AU2015268638B2 - Anti inflammatory 2-oxothiazoles and 2-oxooxazoles - Google Patents

Abstract

Abstract 2-oxothiazole or 2-oxooxazole compounds are provided for use in the prevention or treatment of chronic inflammatory disorders such as glomerulonephritis, rheumatoid arthritis and psoriasis. Also provided are new 2-oxothiazole or 2-oxooxazole compounds, pharmaceutical compositions comprising said compounds and new processes for the manufacture thereof. 2490163vl

Description

ANTI INFLAMMATORY 2-OXOTHIAZOLES AND 2 -OXOOXAZOLES

This invention relates to the use of various 2-oxothiazole or 2-oxooxazole compounds for use in the prevention or treatment of chronic inflammatory disorders such as glomerulonephritis, rheumatoid arthritis and psoriasis. The invention also relates to certain new 2-oxothiazole or 2-oxo-oxazole compounds, pharmaceutical compositions comprising said compounds and to new processes for the manufacture thereof.

Mammalian cells contain a large number of phospholipases that hydrolyse phospholipids in a structurally specific manner for production of a myriad of products, many of which have potent biological activity. There has been considerable interest in characterising these enzymes because of their role in production of lipid mediators of inflammation. Since the first studies 20 years ago showing that mammalian cells contain a cystolic calcium dependent phospholipase specific for arachidonic acid, an extensive amount of evidence has substantiated a primary role for CPLA2 as the key enzyme that mediates the release of arachidonic acid for the production of eicosanoids.

The enzyme CPLA2 contributes to the pathogenesis of a variety of diseases particularly those in which inflammation plays a primary role implicating a role for inflammatory lipid mediators in disease pathogenesis. The inhibition therefore of such lipase enzymes offers a potential therapy for inflammatory conditions in particular chronic inflammatory conditions such as those above, psoriasis and glomerulonephritis.

The phospholipases are a group of enzymes that release unsaturated fatty acids from the sn2 position of membrane phospholipids. Once released, the fatty acids are converted by various enzymes into biologically very important signalling molecules. Release of arachidonate initiates the arachidonate cascade leading to the synthesis of eicosanoids such as prostaglandins.

Eicosanoids are important in a variety of physiological processes and play a central role in inflammation. In Inflammation, Vol. 18, No. 1 1994, Andersen et al identify the presence of certain phospholipases in psoriatic human skin.

It is therefore believed that inhibition of phospholipase enzymes should have potential in curing some of the inflammatory symptoms, including epidermal hyperproliferation due to increased leukotriene production, related to eicosanoid production and cell activation in both epidermis and dermis in psoriasis.

Psoriasis is a common, chronic, inflammatory skin disorder. Psoriatic tissue is characterised by chronic inflammation in both epidermis and dermis, the disease being further characterised by hyperplasia of epidermal keratinocytes, fibroblast activation, alteration of eicosanoid metabolism, and leukocyte infiltration.

Glomerulonephritis, also known as glomerular nephritis, abbreviated GN, is a renal disease characterized by inflammation of the glomeruli, or small blood vessels in the kidneys. It may present with isolated hematuria and/or proteinuria or as a nephrotic syndrome, acute renal failure, or chronic renal failure. Glomerulonephritis is categorised into several different pathological patterns, which are broadly grouped into non-proliferative or proliferative types.

The glomerulus is a unique vascular network with three specialised types of cell: the endothelial cell, the mesangial cell and the visceral epithelial cell Mesangial cells (MC) serve a number of functions in the renal glomerular capillary including structural support of the capillary tuft, modulation of the glomerular hemodynamics and a phagocytic function allowing removal of macromolecules and immune complexes. The proliferation of MC is a prominent feature of glomerular disease including IgA nephropathy, membranoproliferative glomerulonephritis, lupus nephritis, and diabetic nephropathy.

Reduction of MC proliferation in glomerular disease models by treatment with, for example, a low protein diet has been shown to produce extracellular matrix expansion and glomerulosclerotic changes. MC proliferation inhibitors may therefore offer therapeutic opportunities for the treatment of proliferative glomerular disease.

Mesangial proliferative glomerulonephritis is a form of glomerulonephritis which involves inflammation at the kidney glomeruli. The mesangial cells which are a part of the glomerular capillaries increase in size giving the glomeruli a lumpy appearance. The disorder usually causes nephritic syndrome which represents protein loss in the urine. It may be present as acute, chronic or rapidly progressive glomerulonephritis and may progress to chronic renal failure.

The present inventors seek new treatments for, inter alia, chronic inflammatory conditions such as GN and psoriasis.

The present inventors have surprisingly found that certain 2-oxo-thiazoles or 2-oxo-oxazoles are ideal cPLA2 inhibitors and offer new therapeutic routes to the treatment of chronic inflammatory disorders. 2-oxothiazole type structures are not new. In Bioorganic and Medicinal Chemistry 16 (2008) 1562-1595, there is a review of chemistry in this field. 2-oxo (benz)thiazoles carrying peptides or amino acids on the 2-position (i.e. where the 2-oxo group forms part of the backbone of an amino acid) are known in the art as thrombin inhibitors.

Also reported are certain hydrolase and transferase inhibitors in particular having a 2-oxo-oleyl side chain. Similar compounds as fatty acid amide hydrolase inhibitors are reported in J Med Chem Vol. 51, No. 237329-7343. Their potential as inhibitors of cPLA2 is not discussed. A wider variety of 2-oxo-oxazole compounds are known from these papers. The majority of these compounds are either unsubstituted oxazole rings or they carry substituents in the position adjacent the oxygen atom. Their potential as inhibitors of cPLAo is not discussed.

Never before therefore, have the compounds claimed herein been identified as potential inhibitors of phospholipase enzymes and hence no link with chronic inflammatory conditions has been made.

Thus, viewed from one aspect the invention provides a compound of formula (0

(I) wherein X is 0 or S;

Ri is H, OH, SH, nitro, NH2, NHCi_6alkyl, N(Ci_6alkyl)2, halo, haloCi_6alkyl, CN, Ci_6-alkyl, OCi.6alkyl, C2-6-alkenyl, C3_i0cycloalkyl, C6-i0aryl, Ci_6alkylC6-loaryl, heterocyclyl, heteroaryl, CONH2, CONHCi^alkyl, CON(Ci_6alkyl)2, OCOCi. 6alkyl, Ci_6alkylCOOH, Ci_6alkylCOOCi_6alkyl or is an acidic group, such as a group comprising a carboxyl, phosphate, phosphinate, sulfate, sulfonate, or tetrazolyl group; R2 is as defined for Ri or Ri and R2 taken together can form a 6-membered aromatic ring optionally substituted by up to 4 groups R5; R3 is H, halo (preferably fluoro), or CHal3 (preferably CF3); each R5 is defined as for Ri;

Vi is a covalent bond or a Ci.2oalkyl group, or C2_2o-mono or multiply unsaturated alkenyl group; said alkyl or alkenyl groups being optionally interupted by one or more heteroatoms selected from Ο, NH, N(Ci_6 alkyl), S, SO, or S02;

Mi is absent or is a C5-10 cyclic group or a C5-15 aromatic group (c.g.Ce-u aromatic group); and R4 is H, halo, OH, CN, nitro, NH2, NHC^alkyl, N(Ci_6alkyl)2, haloCi.6alkyl, a Ci.2oalkyl group, or C2_2o-mono or multiply unsaturated alkenyl group, said Cj. 2oalkyl or C2_2oalkenyl groups being optionally interupted by one or more heteroatoms selected from Ο, NH, N(Q_6 alkyl), S, SO, or S02; with the proviso that the group V1M1R4 as a whole provides at least 4 backbone atoms from the C(R3) group; or a salt, ester, solvate, N-oxide, or prodrug thereof; for use in the treatment of a chronic inflammatory condition.

Viewed from another aspect the invention provides a compound of formula

(Π) (11) wherein Ri, R2, R3, R5 and R4M1V1 are as hereinbefore defined; or a salt, ester, solvate, N-oxide, or prodrug thereof; with the proviso that R4MiViC(R3) is not oleyl.

Viewed from another aspect the invention provides a compound of formula (III)

(III) wherein R6 is H, Ci_6alkyl, COOH, COOCi_6alkyl, CONH2, CONHCi_6alkyl, CON(Ci_6alkyl)2, C^alkylCOOH, Ci_6alkylCOOCi-6alkyl; R7 is H; wherein R3 is as hereinbefore defined;

Vi is a covalent bond or a Ci_2oalkyl group, or C2-20-mono or multiply unsaturated alkenyl group;

Mi is a covalent bond or is a C5_io cyclic group or a C5_io aromatic group; and R4 is H, halo, OH, CN, nitro, NH2, NHCi_6alkyl, N(Ci_6alkyl)2, haloC^alkyl, a Ci.2oalkyl group, or C2-2o-mono or multiply unsaturated alkenyl group, said alkyl or alkenyl groups being optionally interupted by one or more heteroatoms selected from Ο, NH, N(Ci_6 alkyl), S, SO, or S02; or a salt, ester, solvate, N-oxide, or prodrug thereof with the proviso that R4M[ViC(R3) is not oleyl or -(CH2)6Ph.

Viewed from another aspect the invention provides a compound of formula

CO

wherein X is 0 or S;

Ri is H, OH, SH, nitro, NH2, NHCi_6alkyl, N(Ci_6alkyl)2, halo, haloCi_6alkyl, CN, Ci-6-alkyl, OCi_6alkyl, C2-6-alkenyl, C3-iocycloalkyl, Q,_ioaryl, Ci_6alkylC6-i0aryl, heterocyclyl, heteroaryl, CONH2, C0NHCi_6alkyl, CON(Ci^alkyl)2, OCOCi_ 6alkyl, Ci_6alkylC00H, Ci-6alkylCOOCi.6alkyl or is an acidic group, such as a group comprising a carboxyl, phosphate, phosphinate, sulfate, sulfonate, or tetrazolyl group; R2 is as defined for Ri or R| and R2 taken together can form a 6-membered aromatic ring optionally substituted by up to 4 groups R5; each R3· is the same or different and is H, Ci_6alkylC00Ra where Ra is H or Ci-6 alkyl, halo (preferably fluoro), or CHal3 (preferably CF3); each R5 is defined as for Ri;

Vr is a covalent bond, -NHCOCo-6alkyl- (i.e. where NH is adjacent the CR3' group), a Ci_2oalkyl group, or C2-2o-mono or multiply unsaturated alkenyl group; said alkyl or alkenyl groups being optionally interupted by one or more heteroatoms selected from 0, NH, N(Ci_6 alkyl), S, SO, or S02;

Mi is absent or is a C540 cyclic group or a C545 aromatic group (e.g.C6-i4 aromatic group); and R4 is H, halo, OH, CN, nitro, NH2, NHCi_6alkyl, N(Ci_6alkyl)2, haloCi_6alkyl, a Ci-2oalkyl group, or C2-2o-mono or multiply unsaturated alkenyl group, said Ci_ 2oalkyl or C2-2oalkenyl groups being optionally interupted by one or more heteroatoms selected from Ο, NH, N(Ci_6 alkyl), S, SO, or S02; with the proviso that the group V1M1R4 as a whole provides at least 4 backbone atoms from the C(Rv)2 group; or a salt, ester, solvate, N-oxide, or prodrug thereof with the proviso that R4MiVrC(R3')2 is not oleyl. It is also preferred if R4MiVrC(R3')2 is not CH2Ph.

The invention also concerns a compound of formula (Γ) as hereinbefore defined but without the disclaimer for use in the treatment of a chronic inflammatory condition.

Viewed from another aspect the invention provides a compound of formula

(ΙΙΓ) (ΠΓ) wherein R6, R7, R31, Vr, Mi, R4 are as hereinbefore defined; with the proviso that R4MiViC(R3) is not oleyl or -(CH2)6Ph.

Viewed from another aspect the invention provides a pharmaceutical composition claim comprising a compound of formula (Γ), (II) , (III) or (III') as hereinbefore defined.

Viewed from another aspect the invention provides a compound of formula (Γ), (II), (III) or (III') as hereinbefore defined for use in therapy.

Viewed from another aspect the invention provides use of the a compound of formula (I) or (Γ) as hereinbefore defined in the manufacture of a medicament for the treatment of a chronic inflammatory condition.

Viewed from another aspect the invention provides a method of treating a chronically inflammatory disorder comprising administering to a patient an effective amount of a compound of formula (I) or (Γ) as hereinbefore defined.

Definitions

In this specification, unless stated otherwise, the term "alkyl" includes both straight and branched chain alkyl radicals and may be methyl, ethyl, n-propyl, i-propyl, n-butyl, i- butyl, s-butyl, t-butyl, n-pentyl, i-pentyl, t-pentyl, neo-pentyl, n-hexyl or i-hexyl, t- hexyl.

The term "cycloalkyl" refers to an optionally substituted carbocycle containing no heteroatoms, including mono-, and multicyclic saturated carbocycles, as well as fused ring systems. Cycloalkyl includes such fused ring systems as spirofused ring systems. Examples of cycloalkyl include cyclopropyl, cyclobutyl, cyclopentyl, cyclohexyl and the like.

The term "alkenyl" includes both straight and branched chain alkenyl radicals. The term alkenyl refers to an alkenyl radicals one or more double bonds and may be, but is not limited to vinyl, allyl, propenyl, i-propenyl, butenyl, i-butenyl, crotyl, pentenyl, i- pentenyl and hexenyl.

The term "aryl" refers to an optionally substituted monocyclic or bicyclic hydrocarbon ring system containing at least one unsaturated aromatic ring.

Examples and suitable values of the term "aryl" are phenyl, naphtyl, 1,2,3,4-tetrahydronaphthyl, indyl, indenyl and the like.

In this specification, unless stated otherwise, the term "heteroaryl" refers to an optionally substituted monocyclic or bicyclic unsaturated, aromatic ring system containing at least one heteroatom selected independently from N, O or S. Examples of "heteroaryl" may be, but are not limited to thiophene, thienyl, pyridyl, thiazolyl, isothiazolyl, furyl, pyrrolyl, triazolyl, imidazolyl, oxadiazolyl, oxazolyl, isoxazolyl, pyrazolyl, imidazolonyl, oxazolonyl, thiazolonyl, tetrazolyl and thiadiazolyl, benzoimidazolyl, benzooxazolyl, benzothiazolyl, tetrahydrotriazolopyridyl, tetrahydrotriazolopyrimidinyl, benzofuryl, thionaphtyl, indolyl, isoindolyl, pyridonyl, pyridazinyl, pyrazinyl, pyrimidinyl, quinolyl,, phtalazinyl, naphthyridinyl, quinoxalinyl, quinazolyl, imidazopyridyl, oxazolopyridyl, thiazolopyridyl, pyridyl, imidazopyridazinyl, oxazolopyridazinyl, thiazolopyridazinyl, cynnolyl, pteridinyl, furazanyl, benzotriazolyl, pyrazolopyridinyl, purinyl and the like.

In this specification, unless stated otherwise, the term "heterocycle" refers to an optionally substituted, monocyclic or bicyclic saturated, partially saturated or unsaturated ring system containing at least one heteroatom selected independently from N, O and S, e.g. piperidinyl, morpholino, or piperazinyl.

Any cyclic group can be a cycloalkyl group, cycloalkenyl group or heterocyclic group.

Any aromatic group can be aryl or heteroaryl in nature, e.g. phenyl, naphthyl or pyridyl.

An acidic group is one comprising a carboxyl, phosphate, phosphinate, sulfate, sulfonate, or tetrazolyl group, e.g. an C^alkyl linked to a carboxyl, phosphate, phosphinate, sulfate, sulfonate, or tetrazolyl group. Highly preferred acidic groups are COOH, COOCi_6alkyl, or Ci-6alkyl substituted by COOH, COOCi. 6alkyl or C6-ioaryl group substituted by COOH, COOCi_6alkyl.

Detailed Description of Invention

It is preferred if X is S and the ring system is a thiazole system.

It is preferred if Ri is hydrogen.

It is preferred if R2 is hydrogen or is an acidic group, e.g. a group comprising a carboxylic group or derivative thereof (i.e. a COO group). Thus, R2 may be COOH, or an ester, e.g. alkyl ester thereof. The acid group may also be spaced apart from the ring by some form of linking chain such as an alkylene chain or an aromatic group. Highly preferred groups are COOH, COOCi_6alkyl and Ci_ ealkylCOOH.

It is believed that the presence of a carboxyl functional group attached to the heterocyclic ring enhances interaction of the compound with the active site of the phospholipase enzyme, in particular, the side chain of arginine 200. This arginine is believed to carry a free guanidine group so any substituent which can favourably interact with this guanidine is preferred at the Ri and/or R2 position.

In one embodiment Ri and R2 can be taken together to form a ring system such as a phenyl ring or pyridine ring. Where a pyridine ring system forms the N atom is preferably in the 4-position of the ring (S=l position, N=3, N=4). Preferably the ring system will be a carbon ring system, e.g. forming a benzothiazole type structure. If such a ring system is formed, it may be substituted preferably by 1 or 2 groups R5. Preferences for R5 are the same as those for R2. Preferably the R5 group is positioned on the 5-position of the ring (where S is the 1-position and N is the 3-position). Ideally however such a ring system is unsubstituted.

Preferred compounds in this regard are of formula (VII)

(VII) or (VII') where the substituents are as hereinbefore defined and Z is C or N.

It is especially preferred if at least one of Ri and R2 (especially Ri) is hydrogen. The heterocyclic ring is ideally only monosubstituted. In a further preferred embodiment both Ri and R2 are hydrogen. R3 is preferably hydrogen or, in a highly preferred embodiment, R3 is halo, especially fluoro. It is believed that the presence of the F atom adjacent the carbonyl enhances the activity of the carbonyl group and may also interact favourably with the active site in the CPLA2 enzyme, in particular IVa PLA2.

It is preferred if one R3· is H. It is also preferable if one R3’ is halo, especially fluoro. The presence of two fluoro atoms as R3' is also preferred. It is believed that the presence of the F atom adjacent the carbonyl enhances the activity of the carbonyl group and may also interact favourably with the active site in the CPLA2 enzyme, in particular IVa PLA2.

The discussion of the group V1M1R4 which follows also applies to V1M1R4. The group V1M1R4 as a whole provides at least 4 backbone atoms from the CXR3) group. Preferably, V1M1R4 provides at least 5 backbone atoms, more preferably at least 7 backbone atoms especially at least 10 backbone atoms from the CXR3) group. For the avoidance of doubt, where there is an aromatic group in the backbone, the backbone is considered to follow the shortest route around the ring. Thus, for a 1,4-phenyl group, that would constitute 4 backbone atoms. A 1,3 linked 5 membered ring in the backbone would constitute 3 backbone atoms and so on.

Vi (or Vi ) is preferably an Ci_i5-alkyl group, C2-2o-alkenyl group or is a -Ci_ 6alkylO- group (i.e. where the O atom bonds to Μχ). Any alkenyl group can have one or more than one double bond. Where more than one double bond is present, it is preferred if these are non conjugated. Double bonds will preferably take the cis form. Preferred alkyl groups for Vi (or Vr) include Ci_6-alkyl.

It is especially preferred if any alkyl or alkenyl group in Vj (or V i ) is linear.

Vi> may also represent an amide linkage NHCO which may then optionally carry an alkyl chain of up to 6 carbon atoms. That chain is preferably linear. The NH part of the linkage is adjacent the CR3' group.

Preferably Μχ is either absent or is an C6_xoaryl group, especially a phenyl group. Alternatively, Μχ may be a bicyclic aromatic group such as deealin. A further preferred embodiment is where Μχ represents a biphenyl group, i.e. a C5-15 aromatic group in which two phenyl groups are directly linked. Where Mi is a phenyl group, Vi or Vr and R4 are preferably attached in the 1 and 4 positions of the ring, i.e. they are para to each other. R4 is preferably an H atom, Ci-ioalkyl group or an Ci_ioalkoxy group.

In one embodiment it is preferred in any compound of the invention that R4MiViC(R3) or R4MiVrC(R3')2 is not oleyl or -(CH2)6Ph.

Thus, a still more preferred compound of the invention is of formula (VI)

(VI) wherein Ri is H; R2 is H, COOH, COOCi_6alkyl, C^.alkylCOOH, or Ci_6alkylCOOCi_6alkyl; R3 is H or F;

Vi is Ci_i5-alkyl group, C2-20-alkenyl group or is a -Ci_6-alkylO- group;

Mi is absent or is a phenyl group; R4 is H, Ci_ioalkyl group or an Ci-ioalkoxy group.

In further highly preferred combinations: 1. Vi is Ci-15-alkyl group or C2-20-alkenyl group, Mi is absent and R4 is H. 2. Vi is C1-6-alkyl group or is a -Ci_6-alkylO group, Mi is a phenyl group, and R4 is H or Ci_6 alkoxy (where the O atom is adjacent the Mi group); 3. R4ViMi represents a C10-20 linear alkyl group.

Also preferred are options 1-3 above in which Vi is Vr In a highly preferred embodiment, the invention provides the compounds in the examples.

Synthesis

The manufacture of the compounds of the invention typically involves known literature reactions. For example, the formation of an 2-oxothiazole, the precursor to many of the claimed compounds, can be achieved by reaction of an aldehyde XCOH with thiazole in the presence of a base and subsequent oxidation of the hydroxyl to a ketone. The X group is obviously selected to form the desired R4M1V1 or R4M1Vi- group or a precursor thereof.

These reactions are summarised in Scheme 1 below.

Scheme 1. (a) thiazole, base·, (b) oxidation, e.g. Dess-Martin periodinane.

It will be appreciated that in the scheme above and many of those below, specific reagents and solvents may mentioned to aid the skilled man in carrying out the reactions described. The skilled man will appreciate however that a variety of different conditions, reagents, solvents, reactions etc could be used to effect the chemistry described and the conditions quoted are not intended to be limiting on the reactions described.

An alternative strategy involves the reaction of an alkoxy amide XCON(Oalkyl) with thiazole in base which affords 2-oxothiazoles directly. This reaction is summarised in scheme 2.

Scheme 2. (a) thiazole, base.

The inventors have however found a new and preferred way of forming 2-oxothiazoles and this forms a still yet further aspect of the invention. The new process involves the reaction of an oxo-morpholino structure with thiazole, typically in the presence of a base. This reaction affords 2-oxo thiazoles directly and is a new reaction.

Thus viewed from another aspect the invention provides a process for the formation of a 2-oxothiazole comprising reacting a compound of formula (IV)

(IV) wherein Y is an organic group, e.g. a group F^MiViCHfR?), with an optionally substituted thiazole in the presence of a base so as to form an optionally substituted compound of formula (V)

(V)

This reaction is effected in the presence of a base, e.g. nBuLi or the like. Ideally, the reaction is effected at low temperature, e.g. at 0°C or below so in an ice bath, or other known cooling system, e.g. liquid ammonia.

It will be appreciated that this reaction is preferably used to form compounds of formula (I) or (II) or (III) or their (Ι')/(ΙΙΓ) analogues and this forms a still further aspect of the invention. It will be preferred therefore if the definition if Y reflects the group R4MiViCH(R.3) or R4M1 VrC(R.3')2 or forms a precursor thereto. It will also be preferred if the thiazole used reflects the preferred thiazole reactant required to make a compound of the invention, i.e. carrying the necessary R1/R2 substituents etc. The reaction is however more generally applicable so variable Y is broadly defined and the thiazole may be optionally substituted.

It is believed that the morpholino intermediates used in this reaction are new and these form a further aspect of the invention. Thus, viewed from another aspect the invention provides an intermediate compound of formula (IX)

(IX) wherein R.4MiViCH(R3) is as hereinbefore defined.

Viewed from another aspect the invention provides an intermediate compound of formula (IX')

(IX') wherein R.4MiVrC(R3)2 is as hereinbefore defined.

There are still further ways of developing a 2-oxo thiazole ring carrying a substituent. The ring itself can be generated from a thioamide as described in scheme 3.

Scheme 3. (a) TBDMSCN, KCN; (b) H2O2, BU4NHSO4; (c) Lawesson’s reagent; (d) BrCt^COCOOEt; (e) Dess Martin periodinane.

As noted above, an interesting class of compounds of the invention are those having a fluoro atom adjacent the carbonyl. This is conveniently introduced before attachment of the ring system by conventional chemistry. A hydroxy group may be converted to a fluoro group using Diethylaminosulfur trifluoride (DAST) for example. This chemistry is elucidated below:

Scheme 4. (a) DAST (b) i. L1AIH4, ii. (COCl)2,

The formed compound can react with thiazole as described above.

Variations of the substituents on the heterocyclic rings and manipulation of the side chain binding the carbonyl can be achieved using all manner of synthetic techniques which the skilled man will know. Guidance is offered in the examples as to how to make a wide variety of compounds and the principles described can be extended to the compounds encompassed by the claims.

The principles described above for preparing thiazoles can be extended to the oxazole species.

Intermediates

Various intermediates are also new and form a further aspect of the invention. In particular, the invention covers the reduced analogue of the final 2-oxoheterocycle, i.e. a 2-hydroxy analogue. Thus, viewed from another aspect the invention provides a compound of formula (VIII)

(VIII) or (Vllf) wherein Ri, R2, R3, R3', R5 and R4M1V1 / R4M1V1' are as hereinbefore defined; or a salt, ester, solvate, N-oxide, or prodrug thereof; preferably with the proviso that R4MiViC(R3) or R4MiViC(R3)2 is not oleyl.

Chronic Inflammatory Disorders

The compounds of the invention are used in the treatment of chronic inflammatory disorders, in particular those associated with phospholipase inhibition.

Preferably, any compound of the invention will achieve 90% inhibition against IVa PLA2.

Preferably, compounds of the invention inhibit IVa CPLA2 at a low μΜ range such as 5 μΜ or less, preferably 4 μΜ or less.

It is further preferred that the compounds of the invention show greater inhibition of IVa CPLA2 than 1PLA2 or SPLA2 according to published assays for these enzymes (see, for example, Yang, H et al. (1999) Anal. Biochem. 269: 278). Ideally, the compounds of the invention show limited or no inhibition of 1PLA2 or SPLA2 and they are therefore highly specific for the IVa CPLA2 enzyme.

Specific diseases of interest are glomerulonephritis, inflammatory dermatoses such as psoriasis and rheumatoid arthritis.

Further conditions of interest include other inflammatory dermatoses such as atopic dermatitis, allergic contact dermatitis, seborrheic dermatitis, pityriasis rosea, lichen planus and drug eruptions.

Furthermore the compounds of the invention may have use in the treatment of other types of arthritis and dermatoses, inflammatory CNS diseases, multiple sclerosis, chronic obstructive pulmonary disease, chronic lung inflammatory conditions, inflammatory bowel disease such as ulcerative colitis and crohns disease and cardiovascular disease.

Thus viewed from a further aspect the invention provides for the treatment of any of the conditions listed above using the compounds of the invention.

Formulation

The compounds of the invention are preferably formulated as pharmaceutically acceptable compositions. The phrase "pharmaceutically acceptable", as used in connection with compositions of the invention, refers to molecular entities and other ingredients of such compositions that are physiologically tolerable and do not typically produce untoward reactions when administered to a mammal (e.g. human). Preferably, as used herein, the term "pharmaceutically acceptable" means approved by a regulatory agency of the

Federal or a state government or listed in the U.S. Pharmacopoeia or other generally recognized pharmacopoeia for use in mammals, and more particularly in humans.

The term "carrier" applied to pharmaceutical compositions of the invention refers to a diluent, excipient, or vehicle with which an active compound is administered. Such pharmaceutical carriers can be sterile liquids, such as water, saline solutions, aqueous dextrose solutions, aqueous glycerol solutions, and oils, including those of petroleum, animal, vegetable or synthetic origin, such as peanut oil, soybean oil, mineral oil, sesame oil and the like. Suitable pharmaceutical carriers are described in "Remington's Pharmaceutical Sciences" by E.W. Martin, 18th Edition, incorporated by reference. Particularly preferred for the present invention are carriers suitable for immediate-release, i.e., release of most or all of the active ingredient over a short period of time, such as 60 minutes or less, and make rapid absorption of the drug possible.

The compounds of the invention can be administered in salt, solvate, prodrug or ester form, especially salt form. Typically, a pharmaceutical acceptable salt may be readily prepared by using a desired acid. The salt may precipitate from solution and be collected by filtration or may be recovered by evaporation of the solvent. For example, an aqueous solution of an acid such as hydrochloric acid may be added to an aqueous suspension of a compound of formula (I) and the resulting mixture evaporated to dryness (lyophilised) to obtain the acid addition salt as a solid. Alternatively, a compound of formula (I) may be dissolved in a suitable solvent, for example an alcohol such as isopropanol, and the acid may be added in the same solvent or another suitable solvent. The resulting acid addition salt may then be precipitated directly, or by addition of a less polar solvent such as diisopropyl ether or hexane, and isolated by filtration.

Suitable addition salts are formed from inorganic or organic acids which form non-toxic salts and examples are hydrochloride, hydrobromide, hydroiodide, sulphate, bisulphate, nitrate, phosphate, hydrogen phosphate, acetate, trifluoroacetate, maleate, malate, fumarate, lactate, tartrate, citrate, formate, gluconate, succinate, pyruvate, oxalate, oxaloacetate, trifluoroacetate, saccharate, benzoate, alkyl or aryl sulphonatcs (eg mcthancsulphonatc, cthancsulphonatc, benzenesulphonate or p-toluenesulphonate) and isethionate. Representative examples include trifluoroacetate and formate salts, for example the bis or tris trifluoroacetate salts and the mono or diformate salts, in particular the tris or bis trifluoroacetate salt and the monoformate salt.

Those skilled in the art of organic chemistry will appreciate that many organic compounds can form complexes with solvents in which they are reacted or from which they are precipitated or crystallized. These complexes are known as "solvates". For example, a complex with water is known as a "hydrate". Solvates of the compounds of the invention are within the scope of the invention. The salts of the compound of Formula (I) may form solvates (e.g. hydrates) and the invention also includes all such solvates.

The term "prodrug" as used herein means a compound which is converted within the body, e.g. by hydrolysis in the blood, into its active form that has medical effects.

The compounds of the invention are proposed for use in the treatment of, inter alia, chronic inflammatory disorders. By treating or treatment is meant at least one of: (i) . preventing or delaying the appearance of clinical symptoms of the disease developing in a mammal; (ii) . inhibiting the disease i.e. arresting, reducing or delaying the development of the disease or a relapse thereof or at least one clinical or subclinical symptom thereof, or (iii) . relieving or attenuating one or more of the clinical or subclinical symptoms of the disease.

The benefit to a subject to be treated is either statistically significant or at least perceptible to the patient or to the physician. In general a skilled man can appreciate when "treatment" occurs.

The word "treatment" is also used herein to cover prophylactic treatment, i.e. treating subjects who arc at risk of developing a disease in question.

The compounds of the invention can be used on any animal subject, in particular a mammal and more particularly to a human or an animal serving as a model for a disease (e.g. mouse, monkey, etc.).

An "effective amount" means the amount of a compound that, when administered to an animal for treating a state, disorder or condition, is sufficient to effect such treatment. The "effective amount" will vary depending on the compound, the disease and its severity and the age, weight, physical condition and responsiveness of the subject to be treated and will be ultimately at the discretion of the attendant doctor.

While it is possible that, for use in the methods of the invention, a compound of formula I may be administered as the bulk substance, it is preferable to present the active ingredient in a pharmaceutical formulation, for example, wherein the agent is in admixture with a pharmaceutically acceptable carrier selected with regard to the intended route of administration and standard pharmaceutical practice.

The term "carrier" refers to a diluent, excipient, and/or vehicle with which an active compound is administered. The pharmaceutical compositions of the invention may contain combinations of more than one carrier. Such pharmaceutical carriers can be sterile liquids, such as water, saline solutions, aqueous dextrose solutions, aqueous glycerol solutions, and oils, including those of petroleum, animal, vegetable or synthetic origin, such as peanut oil, soybean oil, mineral oil, sesame oil and the like. Water or aqueous solution saline solutions and aqueous dextrose and glycerol solutions are preferably employed as carriers, particularly for injectable solutions. Suitable pharmaceutical carriers are described in "Remington's Pharmaceutical Sciences" by E.W. Martin, 18th Edition. The choice of pharmaceutical carrier can be selected with regard to the intended route of administration and standard pharmaceutical practice. The pharmaceutical compositions may comprise as, in addition to, the carrier any suitable binder(s), lubricant(s), suspending agent(s), coating agent(s), and/or solubilizing agent(s).

It will be appreciated that pharmaceutical compositions for use in accordance with the present invention may be in the form of oral, parenteral, transdermal, inhalation, sublingual, topical, implant, nasal, or cntcrally administered (or other mucosally administered) suspensions, capsules or tablets, which may be formulated in conventional manner using one or more pharmaceutically acceptable carriers or excipients.

There may be different composition/formulation requirements depending on the different delivery systems. Likewise, if the composition comprises more than one active component, then those components may be administered by the same or different routes.

The pharmaceutical formulations of the present invention can be liquids that are suitable for oral, mucosal and/or parenteral administration, for example, drops, syrups, solutions, injectable solutions that are ready for use or are prepared by the dilution of a freeze-dried product but are preferably solid or semisolid as tablets, capsules, granules, powders, pellets, pessaries, suppositories, creams, salves, gels, ointments; or solutions, suspensions, emulsions, or other forms suitable for administration by the transdermal route or by inhalation.

The compounds of the invention can be administered for immediate-, delayed-, modified-, sustained-, pulsed-or controlled-release applications.

In one aspect, oral compositions are slow, delayed or positioned release (e.g., enteric especially colonic release) tablets or capsules. This release profile can be achieved without limitation by use of a coating resistant to conditions within the stomach but releasing the contents in the colon or other portion of the GI tract wherein a lesion or inflammation site has been identified or a delayed release can be achieved by a coating that is simply slow to disintegrate or the two (delayed and positioned release) profiles can be combined in a single formulation by choice of one or more appropriate coatings and other excipients. Such formulations constitute a further feature of the present invention.

Pharmaceutical compositions can be prepared by mixing a therapeutically effective amount of the active substance with a pharmaceutically acceptable carrier that can have different forms, depending on the way of administration.

Typically composition components include one or more of binders, fillers, lubricants, odorants, dyes, sweeteners, surfactants, preservatives, stabilizers and antioxidants.

The pharmaceutical compositions of the invention may contain from 0.01 to 99% weight - per volume of the active material. The therapeutic doses will generally be between about 10 and 2000 mg/day and preferably between about 30 and 1500 mg/day. Other ranges may be used, including, for example, 50-500 mg/day, 50-300 mg/day, 100-200 mg/day.

Administration may be once a day, twice a day, or more often, and may be decreased during a maintenance phase of the disease or disorder, e.g. once every second or third day instead of every day or twice a day. The dose and the administration frequency will depend on the clinical signs, which confirm maintenance of the remission phase, with the reduction or absence of at least one or more preferably more than one clinical signs of the acute phase known to the person skilled in the art.

It is within the scope of the invention for a compound as described herein to be administered in combination with another pharmaceutical, e.g. another drug with known efficacy against the disease in question. The compounds of the invention may therefore be used in combination therapy.

The invention will now be further described with reference to the following non limiting examples:

The chemistry described in the following schemes is used to manufacture the compounds described in the tables which follow. The starting materials in each scheme are readily available compounds. In general, molar equivalents of each reactant are employed.

The chemistry described in the following schemes is used to manufacture the compounds described in the tables which follow. The starting materials in each scheme are readily available compounds. In general, molar equivalents of each reactant are employed.

Experimental procedures for the formation of compounds A. To a solution of thiazole (1.1 mmol) in dry THF (2 mL) under argon atmosphere and at -78 °C, n-BuLi solution (1.1 mmol, 2.5 M in hexanes) was added dropwise over a period of 5 min. After stirring at -78 °C for 30 min, a solution of the appropriate aldehyde (1 mmol) in dry THF (2 mL) was added and the mixture was stirred for additional 4 hours at -78 °C. Then, H2O was added and the mixture was extracted thrice with EtOAc. The organic layer was dried (Na2S04) and concentrated under reduced pressure. Purification by flash eluting with the appropriate mixture of EtOAc: petroleum ether (40-60 °C) afforded the desired product. B. To a solution of the hydroxy-heterocycle (1 mmol) in dry CH2CI2 (10 mL), Dess-Martin periodinane was added (1.5 mmol) and the mixture was stirred for 1 h at rt. The organic solution was washed with 10% aqueous NaHC03, dried over Na2S04 and concentrated under reduced pressure. The residue was purified by column-chromatography using the appropriate mixture of EtOAc: petroleum ether (40-60 °C) as eluent. C. To a stirred solution of the carboxylic acid (1 mmol) in CH2C12 (7 mL), 4-dimethylaminopyridine (DMAP) (1 mmol), N, O-dimethyl hydroxyamine hydrochloride (1 mmol), ,V-mcthylmorpholine (1 mmol) and N-(3-dimethylaminopropyl)-iV’-ethyl carbodiimide hydrochloride (WSCI.HC1) (1 mmol) were added consecutively at room temperature. The reaction mixture was left stirring for 18 h. It was then washed with an aqueous solution of 10% citric acid (3x10 mL), brine (10 mL), an aqueous solution of NaHCC>3 5% (3 x 10 mL) and brine (10 mL). The organic layer was dried (Na2S04) and concentrated under reduced pressure. The amide was purified by flash chromatography eluting with the appropriate mixture of EtOAc: petroleum ether (40-60 °C) to afford the desired product. D. To a stirred solution of acid (1 mmol) in dry CH2C12 (7 mL), DMF (0.5 eq.) was added followed by oxalyl chloride (3 mmol) at room temperature. The reaction mixture was left stirring for 3 h. The solvent was removed and dry Et20 (7 mL) was added and cooled at 0 °C. Pyridine (5 mmol) was added drop-wise, followed by drop-wise adittion of morpholine (5 mmol). The reaction mixture was left stirring for 18 h at room temperature. Then, H20 (8 mL) was added and it was left stirring for 30 min. The layers were separated and the organic layer was washed with an aqueous solution of HC1 IN (3 x 10 mL), brine (1x10 mL), an aqueous solution of NaHCC>3 5% (3 x 10 mL) and brine (1 x 10 mL). The organic layer was dried (Na2S04) and concentrated under reduced pressure. Purification by flash chromatography eluting with the appropriate mixture of EtOAc: petroleum ether (40-60 °C) afforded the desired product. E. To a stirred solution of thiazole or benzothiazole (3 mmol) in dry Et20 (20 mL) at -78 °C under a dry argon atmosphere was added a solution of «-BuLi (1.6 M in hexanes, 3 mmol) drop-wise over a period of 10 min. The resulting orange solution was stirred for 45 min. Then, a solution of the amide (1 mmol) in dry Et20 (2 mL) was slowly added giving the mixture a dark brown color. After stirring for 30 min. at -78 °C, the mixture was allowed to warm up to room temperature over a period of 2 h. Then, saturated aqueous ammonium chloride solution was added and the mixture was extracted with ether (2x10 mL). The combined extracts were washed with brine and then dried over Na2SC>4 and concentrated under reduced pressure. Purification by flash chromatography eluting with the appropriate mixture of EtOAc: petroleum ether (40-60 °C) afforded the desired product. F. To a stirred solution of the ester (1 mmol) in dry Et20 (10 mL) was added dropwise DIBALH (1.1 mL, 1.0 M in hexane, 1.1 mmol) at 0 °C. The reaction was stirred for 10 min and then quenched with H20. The mixture was stirred for 30 min, dried over Na2S04, and filtered through a pad of Celite. The solvent was evaporated and the crude product was purified by silica gel column chromatography. G. To a solution of the alcohol (1 mmol) in a mixture of toluene-EtOAc (6 mL), a solution of NaBr (1.05 mmol) in water (0.5 mL) was added, followed by AcNH-TEMPO (0.01 mmol). To the resulting biphasic system, which was cooled at -5 °C, an aqueous solution of 0.35 M NaOCl (3.14 mL, 1.10 mmol) containing NaHCCh (3 mmol) was added dropwise while stirring vigorously at -5 °C over a period of 1 h. After the mixture had been stirred for a further 15 min at 0 °C, EtOAc (6 mL) and H20 (2 mL) were added. The aqueous layer was separated and washed with EtOAc (4 mL). The combined organic layers were washed consecutively with 5% aqueous citric acid (6 mL) containing 5% KI, 10% aqueous Na2S203 (6 mL), and brine and dried over Na2S04. The solvents were evaporated under reduced pressure, and the residue was used immediately in the next step without any purification. H. A solution of the aldehyde (1 mmol) in CH2CI2 (2 mL) was added to a mixture of te/t-butyl dimethylsilylcyanide (1 mmol), potassium cyanide (0.17 mmol) and 18-crown-6 (0.4 mmol) under argon atmosphere. The mixture was stirred for 1 h. The solvent was evaporated and the crude product was purified by silica gel column chromatography eluting with the appropriate mixture of EtOAc: petroleum ether (40-60 °C) to afford the desired product. I. To a solution of the cyanide (1 mmol) in CH2CI2 (20 mL) at 0 °C was added 30% H2O2 (0.5 mL), tetrabutyammonium hydrogen sulfate (0.2 mmol) and an aqueous solution of 0.5 N NaOH (1.2 mmol). The reaction mixture was stirred in a sealed flask for 18 h during which additional H2O2 (0.5 mL) were added thrice. H20 and CH2CI2 were added and the organic layer was separated, washed with brine and dried over Na2S04. The crude product was purified by silica gel column chromatography eluting with the appropriate mixture of EtOAc: petroleum ether (40-60 °C) to afford the desired product. J. Lawesson’s reagent (0.6 mmol) was added to a solution of the amide (1 mmol) in dry toluene (10 mL) under argon atmosphere. The reaction mixture was stirred for 18 h at room temperature. The solvent was evaporated and the crude product was purified by silica gel column chromatography eluting with the appropriate mixture of EtOAc: petroleum ether (40-60 °C) to afford the desired product. K. To a solution of the thioamide (1 mmol) in ethanol (3.2 mL) under argon atmosphere, was added ethyl bromopyruvate or ethyl 4-chloroacetoacetate (1 mmol) and concentrated H2SO4 (10 pL). The reaction mixture was stirred for 18 h. The solvent was evaporated and the crude product was purified by silica gel column chromatography eluting with the appropriate mixture of EtOAc: petroleum ether (40-60 °C) to afford the desired product. L. To a solution of the hydroxyl heterocyclic ester (1 mmol) in EtOH (25 mL), an aqueous solution of 1 N NaOH (20 mmol, 20 mL) was added. After stirring for 1 h, the solution was acidified with aqueous solution of IN HC1 and the product was extracted with Et20. The organic layer was separated, washed with brine and dried over Na2SC>4. The product was used in the next step without any purification. M. To a solution of the oxo heterocyclic ester (1 mmol) in EtOH (25 mL), an aqueous solution of 20% CS2CO3 (20 mmol, 20 mL) was added. After stirring for 18 h, the solution was acidified with aqueous solution of IN HC1 and the product was extracted with Et20. The organic layer was separated, washed with brine and dried over Na2S04. The product was purified by recrystallization. N. To a stirred solution of L1AIH4 (1M in THF, 2.9 mmol) in dry Et20 (5.5 mL) under argon atmosphere and at -20 °C a solution of the ester (1 mmol) in dry Et20 (5.5 mL) was added. The reaction was stirred for 20 min at -20 °C and for 20 min at rt. Then, it was cooled at 0 °C and quenched with H20. The mixture was stirred for 30 min at rt. Then, additional H20 was added and the mixture was acidified with 1 N HC1 to pH 5. The aqueous layer was washed twice with Et20, and then the combined organic layers were washed with brine, dried over Na2SC>4, and the solvent was evaporated. The crude product was purified by silica gel column chromatography eluting with the appropriate mixture of EtOAc: petroleum ether (40-60 °C) to afford the desired product. Ο. To a stirred solution of the alcohol (1 mmol) in acetone (4.2 mL), K2CC>3 (3 mmol) was added followed by a catalytic amount of KI and the appropriate bromide (1.1 mmol). The solution was refluxed for 18 h, the solvent was evaporated, and H20 and EtOAc were added. The aqueous layer was washed twice with EtOAc and then the combined organic layers were washed with brine, dried over Na2S04, and the solvent was evaporated. The crude product was purified by silica gel column chromatography eluting with the appropriate mixture of EtOAc: petroleum ether (40-60 °C) to afford the desired product. P. A solution of the hydroxy compound (1 mmol) in dry CH2C12 (50 mL) was treated dropwise with a solution of DAST (3 mmol) in dry CH2C12 (2 mL) under argon atmosphere and at -78 °C. The reaction mixture was stirred for 2 h at -78 °C and for additional 16 h at rt. Then, a saturated solution of

NaHCC>3 was added until the bubbling of CO2 stopped. The solution was stirred for 20 min and then H2O and CH2CI2 were added. The organic layer was separated, dried over Na2SC>4, filtered and evaporated, and the crude product was purified by column chromatography on silica gel eluting with EtOAc-petroleum ether (bp 40-60 °C) to yield the desired fluoro derivative. Q. A solution of oxalyl chloride (4 mmol) in dry CH2CI2 (3 mL) under argon atmosphere and at -60 °C was treated dropwise with a solution of dry DMSO (8 mmol) in dry CH2C12 (3.5 mL). After 5 min, a solution of the fluoro alcohol (1 mmol) in dry CH2CI2 (20 mL) was added dropwise and after additional 15 min, dry EhN (16 mmol) was added. The reaction mixture was stirred for 1 h to reach room temperature. Then, the reaction mixture was poured in ice and the aqueous layer was extracted thrice with CH2CI2. The combined organic layers were washed with brine, dried over Na2SC>4, and the solvent was evaporated. The crude product was purified by silica gel column chromatography eluting with the appropriate mixture of EtOAc: petroleum ether (40-60 °C) to afford the desired product. R. A solution of the aldehyde (1 mmol) and methyl (triphenylphosphanylidene)acetate (1.1 mmol) in dry CH2CI2 (3 mL) under argon atmosphere was refluxed for 1 h and then left stirring for 16 h at rt. Saturated solution of NH4CI was added and the aqueous layer was extracted thrice with CH2CI2. The combined organic layers were washed with brine, dried over Na2SC>4, and the solvent was evaporated. The crude product was purified by silica gel column chromatography eluting with the appropriate mixture of EtOAc: petroleum ether (40-60 °C) to afford the desired product. S. A mixture of the unsaturated ester (1 mmol) in dry 1,4-dioxane (10 mL) and a catalytic amount of 10% palladium on activated carbon was hydrogenated for 18 h. After filtration through a pad of celite and the solvent was removed in vacuo. The crude product was purified by silica gel column chromatography eluting with the appropriate mixture of EtOAc: petroleum ether (40-60 °C) to afford the desired product. T. A solution of the aldehyde (1 mmol) and NaHS03 (1.5 mmol in 1.3 mL H2O) in CH2CI2 (1.2 mL) was stirred for 30 min at room temperature. After the formation of a white salt, the organic solvent was evaporated and water (1 mL) was added. The mixture was cooled to 0 °C and an aqueous solution of KCN (1.5 mmol in 1.3 mL H2O) was added dropwise. The reaction mixture was stirred for another 18 h at room temperature and then CH2CI2 and water were added. The organic layer was washed with brine and dried (Na2S04). The solvent was evaporated under reduced pressure and the residual oil was purified by column chromatography on silica gel eluting with the appropriate mixture of EtOAc: petroleum ether (40-60 °C). U. The cyanhydrine (1 mmol) was treated with 6N HC1 (10 mL) in MeOH for 18 h at room temperature. The organic solvent was evaporated and a saturated aqueous solution of K2CO3 was added to pH neutralization. After extraction with CH2C12 (3 x 15 mL), the combined organic phases were washed with brine and dried (Na2S04). The solvent was evaporated under reduced pressure and the residual oil was purified by column chromatography on silica gel eluting with the appropriate mixture of EtOAc: petroleum ether (40-60 °C). V. To a stirred solution of the Z-protected amino compound (1 mmol) in MeOH (8 mL) were added successively a catalytic amount of 10% Pd/C and anhydrous ammonium formate (5 mmol). After stirring for 2 h at rt, the reaction mixture was filtered over celite. The organic layer was then concentrated under reduced pressure to yield the crude product, which was used without any further purification. W. To a stirred solution of phenylacetic acid (1.0 mmol) and the amino component (1.0 mmol) in dry CH2C12 (10 mL), Et2N (1.1 mmol) and subsequently 1-(3-dimethylaminopropyl)-3-ethyl carbodiimide (WSCI) (1.1 mmol) and 1-hydroxybenzotriazole (HOBt) (1.0 mmol) were added at 0 °C. The reaction mixture was stirred for 1 h at 0 °C and overnight at rt. The solvent was evaporated under reduced pressure and EtOAc (20 mL) was added. The organic layer was washed consecutively with brine, IN HC1, brine, 5% NaHC03, and brine, dried over Na2S04 and evaporated under reduced pressure. The residue was purified by column chromatography on silica gel eluting with the appropriate mixture of EtOAc: petroleum ether (40-60 °C). X. A solution of the tert-butyl ester derivative (1 mmol) in 50% TFA/CH2CI2 (10 mL) was stirred for 1 h at room temperature. The organic solvent was evaporated under reduced pressure to afford the desired product.

Compounds 1-3

1a-d 2a-d 3a-d

1-3 R a C15H31 b Ph(CH2)4 c CH3(CH2)7CH=CH(CH2)7 d CH3(CH2)3(CH2CH=CH)4(CH2)3 (a) thiazole, n-BuLi, dry THF, -78 °C; (b) Dess-Martin periodinane, dry CH2CI2.

Characterising data: 1 -(Thiazol-2-yl)hexadecan- l-ol (2a)

Procedure A

White solid. Yield 51%. m.p. 69-71°C *H NMR: δ 7.68 (d, 1H, J= 2.8 Hz, ArH), 7.25 (d, 1H,J= 2.8 Hz, ArH), 4.97 (m, 1H, C//OH), 3.14 (br s, 1H, OH), 1.86 (m, 2H, CftCHOH), 1.48-1.13 (m, 26H, 13 x CH2), 0.86 (t, 3H, J= 6.2 Hz, CH3). 13C NMR: δ 175.6, 142.0, 118.8, 71.8, 38.3, 31.9, 29.7, 29.6, 29.6, 29.5, 29.4, 29.3, 25.2, 22.7, 14.1. 5-Phenyl-l-(thiazol-2-yl)pentan-l-ol (2b)

Procedure A

Colorless Oil. Yield 42%. XH NMR: δ 7.65 (d, 1H, / = 3.4 Hz, ArH), 7.33-7.16 (m, 6H, Ph ArH), 4.97 (m, 1H, C7/OH), 4.5 (br, 1H, OH), 2.62 (t, 2H, J = 7.0 Hz, CH2Ph), 2.05-1.80 (m, 2H, C7/2CHOH), 1.74-1.45 (m, 4H, 2 x CH2). 13C NMR: δ 176.3, 142.3, 141.8, 128.3, 128.2,125.6, 118.7, 71.4, 37.9, 35.7, 31.1, 24.9. (Z)-l-(Thiazol-2-yl)octadec-9-en-l-ol (2c)

Procedure A

C21H37NOS White oil. lR NMR (CDCI3) δ : 7.69 (d, 1H, / = 3.4 Hz, CHN), 7.28 (/, 1H, J= 3.4 Hz, CHS), 5.34 (m, 2H, CH=CH), 4.97 (dd, 1H, // = 7.4 Hz, J2 = 5.2 Hz, CM)H), 3.47 (b, 1H, OH), 2.00 (τη, 6H, 3xCH2), 1.60-1.10 (m, 22H, 11xCH2), 0.88 (t, 3H, J = 6.2 Hz, CH3). 13C NMR (CDCI3) δ : 175.7, 142.0, 129.9, 129.8, 118.7,71.8,38.3,31.9, 29.7, 29.5, 29.3.29.2, 27.1,25.2, 22.6, 14.1. (5Z,8Z,llZ,14Z)-l-(Thiazol-2-yl)icosa-5,8,ll,14-tetraen-l-ol (2d)

Procedure A

C23H35NOS MW: 373.60.

White oil. !H NMR (CDCI3) δ : 7.64 (d, 1H, J= 3.0 Hz, ArH), 7.23 (d, 1H, J= 3.0 Hz, ArH), 5.56-5.21 (m, 8H, 4 x CH=CH), 4.96 (dd, 1H, Jx = 6.8 Hz, J2 = 5.0 Hz, C770H), 4.20-3.90 (br, 1H, OH), 2.98-2.63 (m, 6H, 3 x CHC772CH), 2.18-1.79 (m, 6H, 3 x CH2), 1.69-1.18 (m, 8H, 4 x CH2), 0.90 (t, 3H, J= 6.6 Hz, CH3). 13C NMR (CDCI3) δ : 175.8, 141.9, 130.4, 129.5, 128.5, 128.2, 128.0, 127.9, 127.8, 127.5, 118.7, 71.5, 37.7, 31.4, 29.2, 27.1, 26.8, 25.5, 25.4, 25.1, 22.5, 14.0. MS (ESI) m/z (%) : 373 [M+, 100], l-(Thiazol-2-yl)hexadecan-l-one (3a)

Procedure B

C19H33NOS MW: 323.54.

White solid, m.p.: 39-41 °C !H NMR (200 MHz, CDCI3) δ = 7.98 (d, 1H,/ = 3.0 Hz, ArH), 7.65 (d, 1H, J= 3.0 Hz, ArH), 3.14 (t, 2H, J= 7.4 Hz, CH2CO), 1.81-1.68 (m, 2H, C772CH2CO), 1.421.10 (m, 24H, 12 x CH2), 0.86 (t, 3H, J= 5.0 Hz, CH3). 13C NMR (50 MHz, CDC13) δ = 194.1, 167.3, 144.6, 126.0, 38.5, 31.9, 29.6, 29.4, 29.3,29.2, 24.0, 22.7, 14.1. MS (ESI) m/z (%) : 324 [M+H, 100]+. 5-Phenyl-l-(thiazol-2-yl)pentan-l-one (3b)

Procedure B

Ci4H15NOS MW: 245.34.

Yellow oil. !H NMR (200 MHz, CDC13) δ = 8.00 (d, 1H,/ = 3.0 Hz, ArH), 7.66 (d, 1H, / = 2.8 Hz, ArH), 7.33-7.13 (m, 5H, Ph), 3.21 (t, 2H, / = 6.6 Hz, CH2CO), 2.68 (t, 2H, / = 7.6 Hz, PI1CH2), 1.92-1.65 (m, 4H, 2 x CH2). 13C NMR (50 MHz, CDCI3) δ = 193.8, 167.1, 144.5, 142.0, 128.3, 128.2, 126.1, 125.6,38.2,35.6,30.9, 23.6. (Z)-l-(Thiazol-2-yl)octadec-9-en-l-one (3c)

Procedure B

C2iH35NOS Yellowish oil. !H NMR (CDCI3) δ : 8.00 (d, 1H, ./= 3.0 Hz, CHN), 7.66 (/, 1H, ./= 3.0 Hz, CHS), 5.34 (τη, 2H, CH=CH), 3.16 (t, 2H, J= 8.0 Hz, CH2CO), 2.01 (τη, 4H, 2xC//2CH=), 1.80-1.60 (m, 2H, CH2), 1.60-1.10 (m, 20H, 10xCH2), 0.88 (/ 3H, J= 6.2 Hz, CH3). 13C NMR (CDCI3) δ : 194.1, 167.4, 144.6, 130.0, 129.7, 126.0, 38.5, 32.6, 31.9, 29.7, 29.5, 29.3, 29.2, 29.1, 27.2, 24.0, 22.7, 14.1. (5Z,8Z,llZ,14Z)-l-(Thiazol-2-yl)icosa-5,8,ll,14-tetraen-l-one (3d)

Procedure B

c23h33nos

Yellowish oil. !H NMR (CDC13) δ : 8.00 (d, 1H, J= 2.8 Hz, ArH), 7.66 (d, 1H,/ = 2.8 Hz, ArH), 5.42-5.21 (m, 8H, 4 x CH=CH), 3.19 (t, 2H, / = 7.2 Hz, CH2CO), 2.88-2.63 (m, 6H, 3 x CHCi/2CH), 2.25-2.20 (m, 4H, 2 x CH2), 1.45-1.17 (m, 2H, CH2), 1.40-1.20 (m, 6H, 3 x CH2), 0.88 (t, 3H, / = 6.4 Hz, CH3). 13C NMR (CDCI3) δ : 193.9, 167.2, 144.6, 130.4, 129.1, 128.9, 128.5, 128.2, 128.1, 127.9, 127.5, 126.1, 37.8, 31.5, 29.3, 29.2, 27.2, 26.6, 25.6, 23.9, 22.5, 14.0.

Compounds 3 to 5 (alternative strategies)

4a, b 3a, b

5a, b 3a,b

3-5 R a C15H31 b Ph(CH2)4 (a) thiazole, n-BuLi, dry Et20, -78 °C. N-Methoxy-N-methyl-palmitamide (4a)

Procedure C

C18H37NO2 MW: 299.49. colorless oil. Yield 81%. *H NMR (200 MHz, CDCI3) δ = 3.66 (s, 3H, OMe), 3.16 (s, 3H, NMe), 2.39 (t, 2H, /= 7.6 Hz, CH2CO), 1.70-1.57 (m, 2H, C//2CH2CO), 1.23-1.08 (m, 24H, 12 x CH2), 0.86 (t, 3H,/= 3.8 Hz, CH3). 13C NMR (50 MHz, CDCI3) δ = 174.6, 61.0, 31.8, 29.5, 29.4, 29.3, 24.8, 24.5, 22.5, 13.9. MS (ESI) m/z (%) : 300 [M+H, 100]+.

N-Methoxy-N-methyl-5-phenylpentanamide (4b) (by the Weinreb method) Procedure C

Ci3H19N02 MW: 221.30.

Colorless oil. Yield 81%. !H NMR (200 MHz, CDC13) δ = 7.33-7.12 (m, 5H, Ph), 3.65 (s, 3H, OMe), 3.17 (s, 3H, NMe), 2.65 (t, 2H, /= 7.2 Hz, PhCH2), 2.44 (t, 2H, /= 7.2 Hz, CH2CO), 1.72-1.66 (m, 4H, 2 x CH2). 13C NMR (50 MHz, CDC13) δ = 174.6, 142.2, 128.2, 128.1, 125.6, 61.0, 35.6, 31.6, 31.1,24.2. MS (ESI) m/z (%) : 222 [M+H, 100]'.

General procedure for the synthesis of morpholine amides

To a stirred solution of acid (1 eq.) in dry CH2C12 (7 mL), DMF (0.5 eq.) was added followed by oxalyl chloride (3 eq.) at room temperature. The reaction mixture was left stirring for 3 h. The solvent was removed and dry Et20 (7 mL) was added and cooled at 0 °C. Pyridine (5 eq.) was added drop-wise, followed by drop-wise adittion of morpholine (5 eq.). The reaction mixture was left stirring for 18 h at room temperature. Then, H20 (8 mL) was added and it was left stirring for 30 min. The layers were separated and the organic layer was washed with an aqueous solution of HC1 IN (3 x 10 mL), brine (1 x 10 mL), an aqueous solution of NaHC03 5% (3 x 10 mL) and brine (1x10 mL). The organic layer was dried (Na2SC>4) and concentrated under reduced pressure. Purification by flash chromatography eluting with the appropriate mixture of EtOAc: pet. ether (40-60 °C) afforded the desired product. 1-Morpholinohexadecan-l-one (5a)

Procedure D

C20H39NO2 MW: 325.53.

White solid. Yield 99%. m.p.: 45-46 °C. *H NMR (200 MHz, CDC13) δ = 3.66-3.60 (m, 6H, CH2OCH2, CHHNCHH), 3.43-3.38 (m, 2H, CHHNCHH), 2.28 (t, 2H, J = 7.2 Hz, CH2CO), 1.63-1.52 (m, 2H, CH2CH2CO), 1.34-1.06 (m, 24H, 12 x CH2), 0.85 (t, 3H, J= 5.8 Hz, CH3). 13C NMR (50 MHz, CDCI3) δ = 171.8, 66.8, 66.6, 45.9, 41.7, 33.0, 31.8, 29.6, 29.5, 29.4, 29.3,29.2,25.2,22.6, 14.0. MS (ESI) m/z (%) : 326 [M+H, 100]1. l-Morpholino-5-phenylpentan-l-one (5b)

Procedure D

C15H21NO2 MW: 247.33.

Colorless oil. Yield 74% (1.025 g). ‘H NMR (200 MHz, CDCI3) δ = 7.26-7.09 (m, 5H, Ph), 3.64-3.42 (m, 6H, CH2OCH2, CHHNCHH), 3.41-3.23 (m, 2H, CHHNCHH), 2.61 (t, 2H, J= 7.0 Hz, PhCH2), 2.27 (t, 2H, J= 7.2 Hz, CH2CO), 1.69-1.60 (m, 4H, 2 x CH2). 13C NMR (50 MHz, CDC13) δ = 171.3, 141.9, 128.2, 128.1, 125.5, 66.7, 66.4, 45.7, 41.6, 35.5, 32.7, 30.9, 24.6. MS (ESI) m/z (%) : 248 [M+H, 100]+, 270 [M+23, 23],

Synthesis of 2-oxo-thiazoles using the Weinreb and morpholino amide method

To a stirred solution of thiazole (3 eq.) in dry Et20 (20 mL) at -78 °C under a dry argon atmosphere was added a solution of n-BuLi (1.6 M in hexanes, 3 eq.) drop-wise over a period of 10 min. The resulting orange solution was stirred for 45 min. Then a solution of the amide (1 eq.) in dry Et20 (2 mL) was slowly added giving the mixture a dark brown color. After stirring for 30 min. at -78 °C, the mixture was allowed to warm up to room temperature over a period of 2 h. Then, saturated aqueous ammonium chloride solution was added and the mixture was extracted with ether (2 x 10 mL). The combined extracts were washed with brine and then dried over Na2S04 and concentrated under reduced pressure. Purification by flash chromatography eluting with the appropriate mixture of EtOAc: pet. ether (40-60 °C) afforded the desired product. l-(Thiazol-2-yl)hexadecan-l-one (3a)

Procedure E

Yield when the Weinreb amide was used: 73%.

Yield when the morpholine amide was used: 98%. 5-Phenyl-l-(thiazol-2-yl)pentan-l-one (3b)

Procedure E

Yield when the Weinreb amide was used: 85%.

Yield when the morpholine amide was used: 86%.

Compounds 6 to 9 6

7 8

9 (a) i. DIBALH, Et20, 0 °C, ii. NaOCl, NaHC03, NaBr, 4-AcNH-TEMPO, toluene, AcOEt, H20, -5 °C; (b) thiazole, «-BuLi, dry THF, -78 °C; (c) Dess-Martin periodinane, dry CH2C12. 3-(4-(Hexyloxy)phenyl)propanal (7)

Procedure F then G

Ci5H2202 MW: 234.33 Orange oil. Yield 64%. !H NMR (200 MHz, CDC13) δ = 9.80 (s, 1H, CHO), 7.09 (d, 2H, J= 8.4 Hz, CH), 6.82 (d, 2H, J = 8.6 Hz, 2 x CH), 3.92 (t, 2H, J= 6.4 Hz, CH2), 3.00-2.85 (m, 2H, CH2), 2.80-2.65 (m, 2H, CH2), 1.85-1.65 (m, 2H, CH2), 1.50-1.20 (m, 6H, 3 x CH2), 0.92 (m, 3H, CH3). 13C NMR (50 MHz, CDC13) (5 = 201.7, 157.6, 132.0, 129.1, 114.5, 67.9, 45.5,31.5, 29.2, 27.2, 25.7, 22.5, 14.0 3-(4-(Hexyloxy)phenyl)-l-(thiazol-2-yl)propan-l-ol (8)

Procedure A

c18h25no2s MW: 319.46 Colorless oil. Yield 66%. XH NMR (200 MHz, CDC13) δ = 7.65 (d, 1H, J= 3.2 Hz, ArH), 7.24 (d, 1H, J= 3.4 Hz, ArH), 7.07 (d, 2H, J= 8.8 Hz, 2 x CH), 6.79 (d, 2H, J= 8.6 Hz, 2 x CH), 4.96 (dd, 1H, Jx = 7.6 Hz, J2 = 5.0 Hz, CH), 3.90 (t, 2H, J= 6.4 Hz, CH20), 2.80-2.60 (m, 2H, CH2), 2.25-2.05 (m, 2H, CH2), 1.85-1.65 (m, 2H, CH2), 1.50-1.30 (m, 6H, 3 x CH2), 0.88 (t, 3H, J= 6.2 Hz, CH3). 13C NMR (50 MHz, CDCI3) δ = 175.9, 157.4, 142.0, 133.0, 129.3, 118.8, 114.4, 70.9, 67.9, 39.9, 31.5, 30.5, 29.2, 25.6, 22.5, 14.0. 3-(4-(Hexy]oxy)phenyl)-l-(thiazol-2-yl)propan-l-one (9)

Procedure B

c18h23no2s MW: 317.45

Yellowish oil. Yield 78%. !H NMR (200 MHz, CDC13) δ = 7.95 (d, 1H,/= 3.2 Hz, ArH), 7.62 (d, 1H, J= 3.4 Hz, ArH), 7.15 (d, 2H, J= 8.8 Hz, CH), 6.81 (d, 2H, J= 8.4 Hz, CH), 3.90 (t, 2H, J = 6.6 Hz, CH20), 3.45 (t, 2H, J= 7.2 Hz, CH2), 3.01 (t, 2H, / = 3.8 Hz,, CH2), 1.901.64 (m, 2H, CH2), 1.58-1.20 (m, 6H, 3 x CH2), 0.89 (t, 3H, / = 6.6 Hz, CH3). 13C NMR (50 MHz, CDC13) δ = 193.1, 167.1, 157.5, 144.6, 132.5, 129.3, 126.1, 114.5, 68.0, 40.3, 31.5, 29.2, 28.9, 25.7, 22.6, 14.0. MS (ESI) m/z (%) :318 [M+H, 100]+.

Compounds 10 to 15 10a, b 11a, b

12a,b 13a,b 14a,b

153jb

10-15 R a C15H31 b Ph(CH2)4 (a) TBDMSCN, KCN, 18-crown-6, CH2C12; (b) 30% H202, Bu4NHS04, NaOH, CH2CI2; (c) Lawesson’s reagent, THF; (d) BrCH2COCOOEt, cone. H2S04, EtOH, 40 °C; (e) Dess Martin periodinane, dry CH2C12. 2-(tert-Butyldimethylsilyloxy)heptadecanenitrile (11a)

Procedure H

OTBDMS

CisHgi^CN C23H47NOSi MW: 381.71

Colorless oil. Yield 85%. ‘HNMR (200 MHz, CDCI3) e> = 4.41 (t, 1H, J= 6.4 Hz,, CH), 1.70-1.90 (m, 2H, CH2), 1.40-1.55 (m, 2H, CH2), 1.30-1.15 (m, 24H, 12 x CH2), 1.03-0.82 (m, 12H, 4 x CH3), 0.19 (s, 3H, CH3), 0.14 (s, 3H, CH3). 13CNMR (50 MHz, CDC13)(5 = 120.1, 61.9, 36.3, 31.9, 29.6, 29.5, 29.4, 29.3, 28.9, 25.5, 24.5, 22.7, 18.0, 14.1, -5.2, -5.4. 2-(tert-Butyldimethylsilyloxy)-6-phenylhexanenitrile (lib)

Procedure Η

C18H29NOS1 MW: 303.51

Colorless oil. Yield 82 %. !H NMR (CDCI3): δ = 7.34-7.20 (m, 5H, Ph), 4.44 (t, 1H, ./= 6.6 Hz, , CH), 2.68 (t, 2H, J= 7.4 Hz, , CH2), 1.88-1.80 (m, 2H, CH2), 1.76-1.69 (m, 2H, CH2), 1.68-1.58 (m, 2H, CH2), 0.97 (s, 9H, 3 x CH3), 0.23 (s, 3H, CH3), 0.18 (s, 3H, CH3). 13C NMR (CDC13>5 = 142.0, 128.3, 128.0, 125.8, 120.1,61.8,36.1,35.6,30.8,25.7, 25.5,24.1, 18.0, -5.2, -5.4. 2-(tert-Butyldimethylsilyloxy)heptadecanamide (12a)

Procedure I

C23H49N02Si MW: 399.73 Yellow oil. Yield 63%. !H NMR (200 MHz, CDC13) δ = 6.49 (s, 1H, N//H), 6.14 (s, 1H, NH//), 4.10 (t, 1H, J= 5.0 Hz,, CH), 1.80-1.56 (m, 2H, CH2), 1.40-1.10 (m, 26H, 13 x CH2), 0.95-0.80 (m, 12H, 4 x CH3), 0.17 (s, 3H, CH3), 0.14 (s, 3H, CH3). 13CNMR (50 MHz, CDC13) δ 177.3, 73.4, 35.1, 31.9, 29.7, 29.6, 29.5, 29.4, 29.3, 25.7, 24.1, 22.7, 18.0, 14.1, -4.9, -5.3. MS (ESI) m/z (%)<$ = 400 [M+H, 40]“, 422 [M+Na, 100]+. 2-(tert-Butyldimethylsilyloxy)-6-phenylhexanamide (12b)

Procedure I

Ci8H3iN02Si MW: 321.53

Colorless oil. Yield 100 %. XH NMR (CDC13): δ = 7.28-7.15 (m, 5H, Ph), 6.51 (s, 1H, NH), 5.61 (s, 1H, NH), 4.16 (t, 1H, J= 6.6 Hz,, CH), 2.62 (t, 2H, J= 7.4 Hz, , CH2), 1.77-1.32 (m, 6H, 3 x CH2), 0.91 (s, 9H, 3 x CH3), 0.06 (s, 6H, 2 x CH3). 13C NMR (CDCI3): δ = 177.4, 142.3, 128.2, 128.1, 125.5, 73.2, 35.6, 34.8, 31.2, 25.6, 23.8, 17.8,-5.0, -5.4. MS (ESI) m/z (%) : 322 [M+H, 100]+. 2-(tert-Butyldimethylsilyloxy)heptadecanethioamide (13a)

Procedure J

C23H49NOSS1 MW: 415.79

Yellowish oil. Yield 84%. *H NMR (200 MHz, CDC13) δ = 7.96 (s, 1H, Niffl), 7.74 (s, 1H, NH77), 4.56 (t, 1H, J= 5.0 Hz,, CH), 1.90-1.70 (m, 2H, CH2), 1.47-1.15 (m, 26H, 13 x CH2), 1.00-0.83 (m, 12H, 4 x CH3), 0.12 (s, 3H, CH3), 0.09 (s, 3H, CH3). 13C NMR (50 MHz, CDC13) δ = 210.3, 80.1, 38.0, 32.1, 29.9, 29.8, 29.7, 29.6, 26.0, 25.7, 24.1, 22.9, 18.3, 14.3, -4.7, -4.9. MS (ESI) m/z (%) :416 [M+H, 90]+. 2-(tert-Butyldimethylsilyloxy)-6-phenylhexanethioamide (13b)

Procedure J

CigHaiNOSSi MW: 337.60

Yellowish oil. Yield 64 %. !H NMR (CDCI3): δ = 8.28 (s, 1H, NH), 7.98 (s, 1H, NH), 7.24-7.10 (m, 5H, Ph), 4.52 (t, 1H, J = 6.6 Hz, , CH), 2.57 (t, 2H, J = 7.4 Hz, , CH2), 1.95-1.80 (m, 2H, CH2), 1.62-1.45 (m, 2H, CH2), 1.42-1.25 (m, 2H, CH2), 0.88 (s, 9H, 3 x CH3), 0.06 (s, 3H, SiCH3), 0.04 (s, 3H, SiCH3). 13C NMR (CDCI3): 209.6, 142.3, 128.3, 128.1, 125.5, 79.6, 37.4, 35.6, 31.2, 25.6, 23.5, 17.9, -5.1,-5.3. MS (ESI) m/z (%) : 338 [M+H, 100]+.

Ethyl 2-(l-hydroxyhexadecyl)thiazole-4-carboxylate (14a)

Procedure K

c22h39no3s MW: 397.61

Yellowish solid. Yield 74%. !H NMR (200 MHz, CDC13) δ = 8.06 (s, 1H, CH), 5.03 (dd, 1H, Jx = 4.5 Hz, J2 = 8.1 Hz, , CH), 4.36 (q, 2H, J= 7.1 Hz, , CH2), 3.10-2.90 (br, 1H, OH), 2.00 - 1.60 (τη, 2H, CH2), 1.35 (t, 3H, J= 7.1 Hz,, CH3), 1.40-1.10 (m, 26H, 13 x CH2), 0.85 (t, 3H, J= 6.8 Hz,CH3). 13C NMR (50 MHz, CDC13) δ = 177.3, 161.4, 146.6, 127.1, 71.8, 61.3, 38.1, 31.8, 29.6, 29.5, 29.4, 29.3, 29.2, 25.5, 25.1, 22.6, 14.2, 14.0.

Ethyl 2-(l-hydroxy-5-phenylpentyl)thiazole-4-carboxylate (14b)

Procedure K

c17h21no3s MW: 319.42

Yellowish oil. Yield 45 %. !H NMR (CDC13): S = 8.03 (s, 1H, ArH), 7.25-7.10 (m, 5H, Ph), 5.11-5.00 (m, 1H, CH), 4.33 (q, 2H, J= 5.8 Hz, , OCH2), 4.10-3.95 (m, 1H, OH), 2.56 (t, 2H, J= 7.0 Hz, , CH2), 1.85-1.78 (m, 2H, CH2), 1.62-1.41 (m, 2H, CH2), 1.32 (t, 3H, J= 5.8 Hz,, CH3), 1.24-1.20 (m, 2H, CH2). 13C NMR (CDC13): δ = 177.4, 161.3, 146.4, 142.2, 128.2, 128.1, 127.2, 125.5, 71.5, 61.3,37.8,35.5,30.9, 24.7, 14.2.

Ethyl 2-palmitoylthiazole-4-carboxylate (15a)

Procedure B

C22H37N03S MW: 395.60 White solid. Yield 82%. XH NMR (200 MHz, CDC13): δ = 8.41 (s, 1H, CH), 4.46 (q, 2H, J= 6.8 Hz,, CH2), 3.23 (t, 2H, J= 7.4 Hz, , CH2), 1.85-1.60 (m, 4H, 2 x CH2), 1.43 (t, 3H, J= 6.8 Hz, CH3), 1.42-1.00 (m, 22H, 11 x CH2), 0.88 (t, 3H, J= 6.8 Hz,CH3). 13C NMR (50 MHz, CDC13): δ = 194.3, 167.9, 161.1, 148.9, 133.2, 62.0,38.6, 32.1, 29.9,, 29.8, 29.7, 29.6, 29.5, 29.3, 23.8, 22.9, 14.5, 14.3. MS (ESI) m/z (%) : 418 [M+Na, 100]+.

Ethyl 2-(5-phenylpentanoyl)thiazole-4-carboxylate (15b)

Procedure B

c17h19no3s MW: 317.40

Yellowish oil. Yield 81 % !H NMR (CDC13): S = 8.38 (s, 1H, ArH), 7.24-7.13 (m, 5H, Ph), 4.42 (q, 2H, J= 5.8 Hz, , OCH2), 3.23 (t, 2H, J = 5.8 Hz, , CH2), 2.63 (t, 2H, J = 7.0 Hz, , CH2CO), 1.81-1.65 (m, 4H, 2 x CH2), 1.39 (t, 3H, J= 5.8 Hz, , CH3). 13C NMR (CDC13): 193.8, 167.4, 160.8, 148.6, 142.0, 133.1, 128.3, 128.2, 125.7, 61.8,38.1 ,35.6, 30.7, 23.2, 14.3. MS (ESI) m/z (%) :318 [M+H, 100]+.

Compounds 16 to 19

16 17 18

19 (a) i. L1AIH4, dry Et20, -20 °C, ii. NaOCl, NaHC03, NaBr, 4-AcNH-TEMPO, toluene, AcOEt, H20, -5 °C ; (b) thiazole, n-BuLi, dry THF, -78 °C ; (c) NaOCl, NaHC03, NaBr, 4-AcNH-TEMPO, toluene, AcOEt, H20, -5 °C. 5-(4-(HexyIoxy)phenyl)pentanal (17)

Procedure N then G

C17H2602 MW : 262.39.

Yelloish oil. Yield 97%. !H NMR (200 MHz, CDCI3) S = 9.73 (t, 1H, J= 1.8 Hz, CHO), 7.06 (d, 2H, J= 8.6 Hz, CH, Ph), 6.81 (d, 2H, J= 8.6 Hz, CH, Ph), 3.92 (t, 2H, J= 6.4 Hz, CH2OPh), 2.56 (t, 2H, J = 7.0 Hz, PhCH2), 2.47-2.35 (m, 2H, Ctf2CHO), 1.81-1.67 (m, 2H, Gtf2CH2OPh), 1.65-1.57 (m, 4H, 2 x CH2), 1.55-1.09 (m, 6H, 3 x CH2), 0.90 (t, 3H, J= 6.8 Hz, CH3). 13C NMR (50 MHz, CDC13) δ = 202.3, 157.2, 133.6, 129.0, 114.2, 67.8,43.6, 34.6, 31.5, 31.0, 29.2, 25.6, 22.5, 21.5, 20.8, 13.9. 5-(4-(Hexyloxy)phenyl)-l-(thiazol-2-yl)pentan-l-ol (18)

Procedure A

C20H29NO2S MW: 347.51.

Orange oil. Yield 74%. XH NMR (200 MHz, CDC13) δ = 7.62 (d, 1H,/= 3.2 Hz, ArH), 7.22 (d, 1H, J= 3.4 Hz, ArH), 7.03 (d, 2H, J= 8.8 Hz, CH, Ph), 6.77 (d, 2H, J= 8.6 Hz, CH, Ph), 4.984.84 (m, 1H, C770H), 4.46 (d, 1H, J = 5 Hz, CHO/7), 3.89 (t, 2H, J = 6.4 Hz, CH2OPh), 2.52 (t, 2H, J= 7 Hz, PhCH2), 2.48-1.19 (m, 14H, 7 x CH2), 0.88 (t, 3H, J = 6.6 Hz, CH3). 13C NMR (50 MHz, CDC13) δ = 176.3, 157.0, 141.9, 134.2, 129.0, 118.5, 114.1, 71.5, 67.8, 38.0, 34.7, 31.5, 31.3, 29.2, 25.6, 24.7, 22.5, 20.9, 14.0. MS (ESI) m/z (%) : 348 [M+H, 100]+. 5-(4-(HexyIoxy)phenyl)-l-(thiazol-2-yl)pentan-l-one (19)

Procedure G

C20H27NO2S MW: 345.50.

Yellowish oil. Yield 89%. ’H NMR (200 MHz, CDC13) δ = 7.98 (d, 1H, J = 3.2 Hz, ArH), 7.65 (d, 1H, / = 3.4 Hz, ArH), 7.08 (d, 2H, / = 8.8 Hz, CH, Ph), 6.81 (d, 2H, / = 8.4 Hz, CH, Ph), 3.91 (t, 2H, / = 6.6 Hz, CH2OPh), 3.18 (t, 2H, / = 6.8 Hz, CH2CO), 2.60 (t, 2H,/ = 7.6 Hz, PhCH2), 1.89-1.61 (m, 6H, 3 x CH2), 1.48-1.28 (m, 6H, 3 x CH2), 0.90 (t, 3H, / = 6.6 Hz, CH3). 13C NMR (50 MHz, CDCI3) δ = 193.7, 167.1, 157.2, 144.5, 133.9, 129.1, 126.1, 114.2, 67.8, 38.2, 34.6, 31.5, 31.1, 29.2, 25.6, 23.5, 22.5, 14.0. MS (ESI) m/z (%): 346 [M+H, 100]+

Compounds 20 to 24

(a) Br(CH2)3COOC2H5, K2C03, KI, acetone, reflux; (b) i. L1AIH4, dry Et20, -20 °C, ii. NaOCl, NaHC03, NaBr, 4-AcNH-TEMPO, toluene, AcOEt, H20, -5 °C; (c) thiazole, n-BuLi, dry Et20, -78 °C; (d) NaOCl, NaHC03, NaBr, 4-AcNH-TEMPO, toluene, AcOEt, H20, -5 °C.

Ethyl 4-(4-octylphenoxy)butanoate (21)

Procedure Ο

C20H32O3 MW: 320.47.

Colorless oil. Yield 100%. XH NMR (200 MHz, CDC13) δ = 7.08 (d, 2H, J= 7.8 Hz, CH, Ph), 6.81 (d, 2H, J = 7.6 Hz, CH, Ph), 4.15 (q, 2H, J = 7.0 Hz, COOCH2), 3.99 (t, 2H, J = 5.8 Hz, PhOCH2), 2.58-2.42 (m, 4H, 2 x CH2), 2.17-2.06 (m, 2H, Ctf2CH2COO), 1.57-1.45 (m, 2H, Cif2CH2Ph), 1.27 (br, 13H, 5 x CH2, CH3), 0.89 (t, 3H, J= 5.2 Hz, CH3). 13C NMR (50 MHz, CDC13) δ = 173.2, 156.8, 135.0, 129.1, 114.2, 66.6, 60.3, 35.0, 31.7, 30.8, 29.4, 29.2, 24.6, 22.6, 14.1, 14.0. MS (ESI) m/z (%) : 321 [M+H, 100]+. 4-(4-Octylphenoxy)butanal (22)

Procedure N then G

C18H28O2 MW : 276.41.

Colorless oil. Yield 97%. XH NMR (200 MHz, CDC13) δ = 9.84 (t, 1H, J= 1.4 Hz, CHO), 7.09 (d, 2H, J= 8.6 Hz, CH, Ph), 6.81 (d, 2H,J = 8.8 Hz, CH, Ph), 3.99 (t, 2H,J= 6.0 Hz, PhOCH2), 2.70-2.52 (m, 4H, 2 x CH2), 1.63-1.52 (m, 2H, C/72CH2Ph), 1.31-1.24 (br, 10H, 5 x CH2), 0.90 (t, 3H, J= 6.4 Hz, CH3). 13C NMR (50 MHz, CDCI3) δ = 201.7, 156.6, 135.2, 129.2, 114.1, 66.6, 40.6,35.0, 31.8, 31.7, 29.4, 29.2, 22.6, 22.0, 14.0. 4-(4-Octylphenoxy)-l-(thiazol-2-yl)butan-l-ol (23)

Procedure A

c2lH3lN02s MW: 361.54.

Orange oil. Yield 73%. !H NMR (200 MHz, CDCI3) δ = 7.72 (d, 1H, J= 3.2 Hz, ArH), 7.29 (d, 1H, J = 3.2 Hz, ArH), 7.08 (d, 2H, J= 8.8 Hz, CH, Ph), 6.81 (d, 2H, J= 8.6 Hz, CH, Ph), 5.11 (dd, 1H, Ji = 4.4 Hz, J2 = 7.6 Hz, CHOH), 4.00 (t, 2H, J= 6.0 Hz, PhOCH2), 3.92 (s, 1H, OH), 2.54 (t, 2H, J= 7.2 Hz, CH2Ph), 2.32-1.90 (m, 4H, 2 x CH2), 1.67-1.48 (m, 2H, C7/2CH2Ph), 1.30-1.23 (br, 10H, 5 x CH2), 0.88 (t, 3H, J= 6.2 Hz, CH3). 13C NMR (50 MHz, CDCI3) δ = 175.4, 156.6, 142.0, 135.3, 129.2, 118.9, 114.3, 71.5, 67.7, 35.1, 35.0, 31.9, 31.7, 29.5, 29.2, 25.2, 22.6, 14.1. MS (ESI) m/z (%) : 362 [M+H, 100]+. 4-(4-Octylphenoxy)-l-(thiazol-2-yl)butan-l-one (24)

Procedure G

C2iH29N02S MW: 359.53.

Yellowish oil. Yield 85%. XH NMR (200 MHz, CDC13) δ = 7.99 (d, 1H, J= 3.0 Hz, ArH), 7.65 (d, 1H, J = 3.0 Hz, ArH), 7.07 (d, 2H, J= 8.6 Hz, CH, Ph), 6.80 (d, 2H, J= 8.8 Hz, CH, Ph), 4.06 (t, 2H, J = 6.2 Hz, PhOCH2), 3.39 (t, 2H, J= 7.2 Hz, CH2C=0), 2.54 (t, 2H, J= 7.4 Hz, CH2Ph), 2.26 (quintet, 2H, J = 6.2 Hz, Ci/2CH2C=0), 1.68-1.45 (m, 2H, C7/2CH2Ph), 1.30-1.23 (br, 10H, 5 x CH2), 0.89 (t, 3H, J= 6.2 Hz, CH3). 13C NMR (50 MHz, CDCI3) δ = 193.2, 166.9, 156.7, 144.6, 135.0, 129.1, 126.0, 114.2, 66.7, 35.1, 35.0, 31.8, 31.7, 29.4, 29.2, 23.6, 22.6, 14.0. MS (ESI) m/z (%) : 360 [M+H, 100]+.

Compounds 25 to 29

28 29 (a) DAST, dry CH2C12, -78 °C ; (b) i. LiAlH4, dry Et20, -20 °C, ii. (C0C1)2, dry Et3N, dry DMSO, dry CH2C12, -60 °C ; (c) thiazole, n-BuFi, dry THF, -78 °C ; (d) Dess-Martin periodinane, dry CH2C12.

Methyl 2-fluorohexadecanoate (26)

Procedure P

Cl7H33F02 MW: 288.44.

White solid. Yield 78%. m.p.: 36-38 °C. !H NMR (200 MHz, CDCls) δ = 4.91 (dt, 1H, JH-h = 6.0 Hz, JH-f = 48.8 Hz, CHF), 3.80 (s, 3H, COOCH3), 2.00-1.77 (m, 2H, CCf2CHF), 1.49-1.18 (m, 24H, 12 x CH2), 0.88 (t, 3H, J= 6.8 Hz, CH3). 13C NMR (50 MHz, CDC13) δ = 170.5 (d, Jc-c-f = 24 Hz, COO), 89.0 (d, JC-f = 183 Hz, CF), 52.2, 32.3 (d, JC-c-f = 21 Hz, CH2CHF), 31.9, 29.6, 29.5, 29.4, 29.3, 29.0, 24.4, 24.3,22.7, 14.1. 19F NMR (186 MHz, CDC13) δ = -192.5 (quintet, CHF). 2-Fluorohexadecanal(27)

Procedure N then Q

Ci6H3iFO MW: 258.42.

White solid. Yield 86%. m.p. : 68-71 °C. !H NMR (200 MHz, CDC13) δ = 9.76 (d, 1H, / = 5.8 Hz, CHO), 4.74 (dt, 1H, JH-h = 4.8 Hz, JH-f = 49.0 Hz, CHF), 1.86-1.68 (m, 2H, C772CHF), 1.47-1.10 (m, 24H, 12 x CH2), 0.88 (t, 3H, /= 5.8 Hz, CH3). 13C NMR (50 MHz, CDC13) δ = 200.4 (d, Jc.C-f = 36 Hz, CO), 95.0 (d, JC-f = 178 Hz, CF), 31.9, 30.3 (d, JC-c-f = 20 Hz, CH2), 29.6, 29.5, 29.3, 29.2, 24.2, 24.1, 22.7, 14.1. 19F NMR (186 MHz, CDC13) δ = -200.0 (m, CHF). 2-Fluoro-l-(thiazole-2-yl)hexadeca-l-ol (28)

Procedure A

C19H34FNOS MW: 343.54.

Yellowish solid. Yield 40%. m.p. ; 46-49 °C. !H NMR (200 MHz, CDC13) δ = 7.89 (d, 1/7H, / = 3.2 Hz, ArH), 7.75 (d, 6/7H, / = 3.4 Hz, ArH), 7.45 (d, 1/7H, / = 3.2 Hz, ArH), 7.35 (d, 6/7H, / = 3.2 Hz, ArH), 5.22-5.05 (dm, 1H, / = 13.4 Hz, C7/OH), 5.01-4.66 (dm, 1H, / = 51.6 Hz, CHF), 4.15 (d, 2/3H, J = 4.6 Hz, CHOH), 3.91 (d, 1/3H, J=5.6 Hz, CHOH), 1.94-1.08 (m, 26H, 13 x CH2), 0.88 (t, 3H, J= 6.2 Hz, CH3). 13C NMR (50 MHz, CDCI3) δ = 170.0, 142.1, 119.7, 95.4 (d, JC-f = 173 Hz, CF), 73.2 (d, Jc-c-f = 22 Hz, 1/3COH),73.0 (d, JC C F = 24 Hz, 2/3COH) 31.9, 30.6 (d, ./c_ c-f = 21 Hz, CH2), 29.6, 29.5, 29.4, 29.3, 25.0, 24.9, 22.7, 14.1. 19F NMR (186 MHz, CDC13) δ = -190.2 (m, CHF), -194.3 (m, CHF). MS (ESI) m/z (%) : 344 [M+H, 100]+. 2-Fluoro-l-(thiazoIe-2-yl)hexadeca-l-one (29)

Procedure B

C19H32FNOS MW: 341.53.

White solid. Yield 60%. m.p. : 55-56 °C. XH NMR (200 MHz, CDC13) δ = 8.05 (d, 1H, J= 3.0 Hz, ArH), 7.76 (d, 1H, J= 3.0 Hz, ArH), 6.07 (ddd, 1H, JK_f = 49.8 Hz, JH-h = 3.8 Hz, JK_h = 8.2 Hz, CHF), 2.191.91 (m, 2H, C772CHF), 1.66-1.08 (m, 24H, 12 x CH2), 0.87 (t, 3H, J = 6.6 Hz, CH3). 13C NMR (50 MHz, CDC13) δ = 189.4 (d, JC-c-f = 19 Hz, CO), 164.1, 145.3, 127.1, 92.9 (d, Jc-F = 182 Hz, CF), 32.8 (d, JC-c-f = 21 Hz, CH2), 32.1, 29.9, 29.8, 29.7, 29.6, 29.5,29.3,24.9, 22.9, 14.3. 19F NMR (186 MHz, CDC13) δ = -196.6 (m, CHF). MS (ESI) m/z (%) : 342 [M+H, 100]+.

Compounds 30 to 41

30 31

32 33

34 35

36 37

38 39

40 41 (a) CH3(CH2)5Br, K2C03, KI, acetone, reflux ; (b) NaOCl, NaHC03, NaBr, 4-AcNH-TEMPO, toluene, AcOEt, H20, -5 °C; (c) Ph3P=CHCOOCH3, dry THF, reflux; (d) H2, 10% Pd/C, 1,4-dioxane; (e) i. LiAlH4, dry Et20, -20 °C, ii. NaOCl, NaHC03, NaBr, 4-AcNH-TEMPO, toluene, AcOEt, H20, -5 °C; (f) NaHS03, KCN, CH2C12, H20; (g) 6N HCl/MeOH; (h) DAST, dry CH2C12, -30 °C ; (i) i. LiAlH4, dry Et20, -20 °C, ii. (COCl)2, dry Et3N, dry DMSO, dry CH2C12, -65 °C ; O') thiazole, n-BuLi, dry Et20, -78 °C; (k) Dess-Martin periodinane, dry CH2C12.

The following target compounds of the invention are synthesised according to the protocols above: 2-(4-(Hexyloxy)phenyl)ethanol (31)

Procedure O

C14H22O2 MW: 222.32.

Colorless oil. Yield 97%. !H NMR (200 MHz, CDCI3) <5 = 7.14 (d, 2H, J= 8.6 Hz, CH, Ph), 6.85 (d, 2H, J = 8.8 Hz, CH, Ph), 3.94 (t, 2H, J = 6.4 Hz, CH2OPh), 3.82 (t, 2H, J = 5.2 Hz, Gf/2OH), 2.81 (t, 2H, J = 6.4 Hz, PhCH2), 1.81-1.71 (m, 2H, C//2CH2OPh), 1.50-1.26 (m, 6H, 3 x CH2), 0.91 (t, 3H, J= 6.8 Hz, CH3). 13C NMR (50 MHz, CDC13) δ = 157.8, 130.2, 129.8, 114.6, 68.0, 63.7, 38.2, 31.5, 29.2, 25.6, 22.5, 14.0. 2-(4-(Hexyloxy)phenyl)acetaldehyde (32)

Procedure G

Ci4H2o02 MW: 220.31.

Yellow oil. Yield 97%. ‘H NMR (200 MHz, CDC13) δ = 9.72 (t, 1H, J= 2.4 Hz, CHO), 7.13 (d, 2H, J= 8.4 Hz, CH, Ph), 6.90 (d, 2H, J = 8.6 Hz, CH, Ph), 3.96 (t, 2H, J= 6.4 Hz, CH2OPh), 3.63 (d, 2H, J= 2.4 Hz, PhCH2), 1.92-1.74 (m, 2H, Cif2CH2OPh), 1.54-1.27 (m, 6H, 3 x CH2), 0.92 (t, 3H, J= 6.8 Hz, CH3). 13C NMR (50 MHz, CDCI3) δ = 199.4, 158.2, 130.3, 123.1, 114.7, 67.7, 49.4, 31.2, 28.9, 25.4, 22.3, 13.7. (£)-IYIethyl 4-(4-(hexyloxy)phenyl)but-2-enoate (33)

Procedure R

C17H24O3 MW: 276.37.

Yellowish oil. Yield 86%. ‘H NMR (200 MHz, CDCI3) δ = 7.16-7.05 (m, 3H, CH2C//CH, CH,Ph), 6.84 (d, 2H, /= 8.0 Hz, CH, Ph), 5.79 (d, 1H, /= 15.6 Hz, CHCOOMe), 3.94 (t, 2H, /= 6.4 Hz, CH2OPh), 3.72 (s, 3H, COOCH3), 3.46 (d, 2H, /= 6.4 Hz, PhCH2), 1.83-1.64 (m, 2H, C//2CH2OPh), 1.45-1.23 (m, 6H, 3 x CH2), 0.91 (t, 3H,/ = 6.8 Hz, CH3). 13C NMR (50 MHz, CDC13) δ = 166.9, 157.9, 148.1, 129.6, 129.3, 121.5, 114.6, 68.0, 51.4, 37.6, 31.5, 29.2, 25.7, 22.5, 14.0. MS (ESI) m/z (%) : 277 [M+H, 100]+.

Methyl 4-(4-(hexyloxy)phenyl)butanoate (34)

Procedure S

Ci7H2603 MW: 278.39.

Colorless oil. Yield 91%. ‘H NMR (200 MHz, CDC13) δ = 7.08 (d, 2H,/ = 8.6 Hz, CH, Ph), 6.83 (d, 2H,/ = 8.6 Hz, CH, Ph), 3.93 (t, 2H,/ = 6.6 Hz, CH2OPh), 3.67 (s, 3H, COOCH3), 2.60 (t, 2H, /= 7.2 Hz, PhCH2), 2.33 (t, 2H,/ = 7.2 Hz, CH2COOMe), 2.05-1.89 (m, 2H, Ctf2CH2COOMe), 1.86-1.71 (m, 2H, C//2CH2OPh), 1.54-1.23 (m, 6H, 3 x CH2), 0.92 (t, 3H,/= 6.6 Hz, CH3). 13C NMR (50 MHz, CDC13) δ = 173.9, 157.4, 133.0, 129.2, 114.3, 67.9, 51.3, 34.1, 33.2, 31.5, 29.2, 26.6, 25.7, 22.5, 13.9. 4- (4-(Hexyloxy)phenyl)butanal (35)

Procedure N then G

C16H24O2 MW: 248.36.

Yellow oil. Yield 99%. !H NMR (200 MHz, CDCI3) δ = 9.76 (t, 1H, J= 1.6 Hz, CHO), 7.08 (d, 2H, J= 8.6 Hz, CH, Ph), 6.83 (d, 2H, J= 8.6 Hz, CH, Ph), 3.94 (t, 2H, J= 6.6 Hz, CH2OPh), 2.61 (t, 2H, J = 7.4 Hz, PhCH2), 2.49-2.37 (m, 2H, Ci72CHO), 2.06-1.90 (m, 2H, CT/2CH2CHO), 1.86-1.71 (m, 2H, CiftCH2OPh) 1.49-1.27 (m, 6H, 3 x CH2), 0.91 (t, 3H, J= 6.8 Hz, CH3). 13C NMR (50 MHz, CDC13) δ = 202.4, 157.4, 133.0, 129.2, 114.4, 68.0, 43.1, 34.1, 31.6, 29.3,25.7, 23.8,22.6, 14.0. 5- (4-(Hexyloxy)phenyl)-2-hydroxypentanenitrile (36)

Procedure T

C17H25NO2 MW: 275.39.

Colorless oil. Yield 74%. XH NMR (200 MHz, CDC13) δ = 7.08 (d, 2H, J= 8.8 Hz, CH, Ph), 6.83 (d, 2H, J = 8.8 Hz, CH, Ph), 4.43 (t, 1H,/= 6.2 Hz, C7/OH), 3.94 (t, 2H, J= 6.6 Hz, CH2OPh), 2.63 (t, 2H, J= 6.4 Hz, PhCH2), 2.28 (br s, 1H, OH), 1.93-1.61 (m, 6H, 3 x CH2), 1.53-1.23 (m, 6H, 3 x CH2), 0.91 (t, 3H, J= 6.8 Hz, CH3). 13C NMR (50 MHz, CDC13) δ = 157.4, 132.9, 129.2, 119.9, 114.5, 68.0, 61.0, 34.5, 34.0, 31.5, 29.2, 26.3, 25.7, 22.5, 14.0. MS (ESI) m/z (%) : 293 [M+H20, 100]+.

Methyl 5-(4-(hexyloxy)phenyl)-2-hydroxypentanoate (37)

Procedure U

C18H2804 MW: 308.41.

Colorless oil. Yield 86%. XH NMR (200 MHz, CDCI3) δ = 7.08 (d, 2H, J= 8.6 Hz, CH, Ph), 6.81 (d, 2H, J = 8.6 Hz, CH, Ph), 4.20 (t, 1H,/= 6.8 Hz, CHOR), 3.93 (t, 2H, J= 6.6 Hz, CH2OPh), 3.78 (s, 3H, COOCH3), 3.00 (br s, 1H, CHO/7), 2.58 (t, 2H, J= 6.6 Hz, PhCH2), 1.86-1.55 (m, 6H, 3 x CH2), 1.52-1.17 (m, 6H, 3 x CH2), 0.91 (t, 3H, J = 6.6 Hz, CH3). 13C NMR (50 MHz, CDC13) δ = 175.5, 157.2, 133.7, 129.1, 114.3, 70.3, 67.9, 52.4, 34.5, 33.8, 31.5, 29.2, 26.7, 25.7, 22.5, 14.0. MS (ESI) m/z (%) : 309 [M+H, 100]+.

Methyl 2-fluoro-5-(4-(hexyloxy)phenyl)pentanoate (38)

Procedure P

C18H27FO3 MW : 310.40.

Colorless oil. Yield 37% (182 mg). !H NMR (200 MHz, CDC13) δ = 7.08 (d, 2H, J= 8.6 Hz, CH, Ph), 6.83 (d, 2H, J = 8.8 Hz, CH, Ph), 4.93 (dt, 1H, JH-h = 5.8 Hz, JH-f = 50.2 Hz, CHF), 3.94 (t, 2H, J = 6.6 Hz, CH2OPh), 3.79 (s, 3H, COOCH3), 2.61 (t, 2H, ./= 7.4 Hz, PhCH2), 2.051.62 (m, 6H, 3 x CH2), 1.56-1.23 (m, 6H, 3 x CH2), 0.91 (t, 3H, J= 6.6 Hz, CH3). 13C NMR (50 MHz, CDC13) δ = 170.3 (d, JC-c-f = 23 Hz, COO), 157.4, 133.2, 129.2, 114.4, 88.8 (d, JC-f = 183 Hz, CF), 68.0, 52.3, 34.3, 32.0, 31.6, 29.3, 26.3, 25.7, 22.6, 14.0. 19F NMR (186 MHz, CDCI3) δ = -192.4 (m, CHF). MS (ESI) m/z (%) : 328 [M+H20, 100]+, 311 [M+H, 15]+. 2-Fluoro-5-(4-(hexyloxy)phenyl)pentanal (39)

Procedure N then Q

Ci7H25F02 MW: 280.38.

Yellow oil. Yield 50%. !H NMR (200 MHz, CDC13) δ = 9.74 (d, 1H, J= 6.2 Hz, CHO), 7.08 (d, 2H, J= 8.4 Hz, CH, Ph), 6.84 (d, 2H, J= 8.4 Hz, CH, Ph), 4.76 (dm, 1H, JH_F = 51.4 Hz, CHF), 3.94 (t, 2H, J = 6.6 Hz, CH2OPh), 2.62 (t, 2H, J= 12 Hz, PhCH2), 1.93-1.72 (m, 6H, 3 x CH2), 1.54-1.24 (m, 6H, 3 x CH2), 0.93 (t, 3H, J= 6.6 Hz, CH3). 13C NMR (50 MHz, CDC13) δ = 200.0 (d, JC-c-f = 34 Hz, CHO), 157.4, 133.0, 129.2, 114.4, 94.8 (d, JC-f = 178 Hz, CF), 67.9, 34.3, 31.5, 29.6 (d, JC-C-f = 20 Hz, CH2CHF), 29.2, 26.1, 25.7, 22.6, 14.0. 19F NMR (186 MHz, CDC13) δ = -199.8 (m, CHF). 2-Fluoro-5-(4-(hexyloxy)phenyl)-l-(thiazol-2-yl)pentan-l-ol (40)

Procedure A

c20h28fno2s MW: 365.51.

Yellow oil. Yield 38%. !H NMR (200 MHz, CDC13) δ = 7.90 (d, 1/7H,/ = 3.2 Hz, ArH), 7.83 (d, 6/7H, / = 3.2 Hz, ArH), 7.45 (d, 1/7H, / = 3.2 Hz, ArH), 7.35 (d, 6/7H, / = 3.2 Hz, ArH), 7.05 (d, 2H, / = 8.6 Hz, CH, Ph), 6.80 (d, 2H, / = 8.6 Hz, CH, Ph), 5.15 (dd, 1H, JH.H = 4.6 Hz, JH-f = 12.8 Hz, CT/OH), 4.99-4.65 (dm, 1H, JH_F = 48.2 Hz, CHF), 3.93 (t, 2H, J= 6.4 Hz, CH2OPh), 2.56 (t, 2H, J= 12 Hz, PhCH2), 1.88-1.27 (m, 12H, 6 x CH2), 0.91 (t, 3H, J= 6.8 Hz, CH3). 13C NMR (50 MHz, CDC13) δ = 170.2, 157.2, 142.1, 133.7, 129.1, 119.7, 114.3, 95.1 (d, ./c-F = 174 Hz, CF), 73.0 (d, 1/3C, JC-C-f = 21 Hz, COH), 72.9 (d, 2/3C, JC C-F = 24 Hz, COH), 67.9, 34.5, 31.5, 30.4 (d, JC-c-f = 20 Hz, CH2), 29.2, 26.9, 25.7, 22.5, 14.0. 19F NMR (186 MHz, CDCI3) δ = -190.0 (m, CHF), -194.4 (m, CHF). MS (ESI) m/z (%) : 366 [M+H, 100]+. 2-Fluoro-5-(4-(hexyloxy)phenyl)-l-(thiazol-2-yl)pentan-l-one (41)

Procedure B

c20h26fno2s MW: 363.49.

Colorless oil. Yield 60%. ΧΗ NMR (200 MHz, CDCI3) δ = 8.04 (d, 1H, J = 2.8 Hz, ArH), 7.75 (d, 1H,/ = 3.0 Hz, ArH), 7.07 (d, 2H,/ = 8.4 Hz, CH, Ph), 6.80 (d, 2H, / = 8.6 Hz, CH, Ph), 5.98 (ddd, 1H, /H_F = 49.6 Hz, JH-h = 7.6 Hz, JH-h = 3.6 Hz, CHF), 3.92 (t, 2H, / = 6.6 Hz, CH2OPh), 2.75-2.52 (m, 2H, PhCH2), 2.30-1.70 (m, 6H, 3 x CH2), 1.59-1.26 (m, 6H, 3 x CH2), 0.91 (t, 3H,/ = 6.6 Hz, CH3). 13C NMR (50 MHz, CDCI3) δ = 188.9 (d, /C-C-f = 19 Hz, CO), 163.8, 157.4, 145.1, 133.3, 129.2, 126.9, 114.4, 92.3 (d, Jc.f = 182 Hz, CF), 68.0, 34.3, 32.0 (d, /C-c-f = 21 Hz, CH2CHF), 31.6, 29.3, 26.6, 25.7,22.6,14.0. 19F NMR (186 MHz, CDC13) δ = -196.2 (m, CHF). MS (ESI) m/z (%): 364 [M+H, 100]+.

The following new target compounds are therefore synthesised Table 1. 2-Oxo-thiazoles.

A series of further compounds have been synthesised based on the principles outlined above. These are listed in table 2

Table 2

Synthetic schemes

(a) thiazole, n-BuLi, dry Et20, -78 °C; (b) benzothiazole, n-BuLi, dry Et20, -78 °C.

10a-d 11a-d 12a-d

(a) TBDMSCN, KCN, 18-crown-6, CH2C12; (b) 30% H202, Bu4NHS04, NaOH, CH2C12; (c) Lawcsson’s reagent, THF; (d) Br(CH2)nCOCOOEt, cone. H2S04, EtOH, 40 °C; (e) Dess Martin periodinane, dry CE[2Cl2; (f) IN NaOH, EtOH; (g) Cs2C03, EtOH.

42a,b 43a,b 44a,b 45a,b 46a,b 47

42-46

a H b (αΗ2)2ΟΟΟιΒιι (a) Λ', (2-dimethyl hydroxylamine hydrochloride, DMAP, /V-mcthyl morpholine, WSCI.HC1, CH2C12; (b) ammonium formate; 10% Pd/C, MeOH; (c) PhCH2COOH, Et3N, WSCI, HOBt, CH2C12; (d) benzothiazole, n-BuLi, dry Et20, -78 °C; (e) 50% TFA/CH2C12.

Characterization data

The following target compounds of the invention are synthesised according to the protocols above: /V- me t li o x y-/V- m e t h v I ο I ea m i d e (4c)

Prepared by Procedure C

c20h39no2 MW: 325.53

Colorless oil. Yield 86% (985 mg). lR NMR (200 MHz, CDC13) δ = 5.34-5.29 (m, 2H, CH=CH), 3.65 (s, 3H, OMe), 3.15 (s, 3H, NMe), 2.38 (t, 2H, /= 7.4 Hz, CH2CO), 1.99 (m, 4H, CH2CR=CRCH2), 1.60 (m, 2H, C//2CH2CO), 1.29-1.24 (m, 20H, 10 x CH2), 0.85 (t, 3H, J= 5.2 Hz, CH3). 13C NMR (50 MHz, CDC13) δ = 174.5, 129.8, 129.6, 61.0, 31.8, 29.6, 29.6, 29.4, 29.3, 29.2, 27.0, 25.5, 24.5, 22.5, 14.0. iV-methoxy-iV-methyl-5-(naphthalen-2-yl)pentanaimde(4e)

Prepared by Procedure C

Ci7H2iN02 MW: 271.35

Colorless oil. Yield 75% (310 mg). !H NMR (CDCI3): δ = 7.90-7.30 (m, 7H, ArH), 3.65 (s, 3H, OMe), 3.18 (s, 3H, NMe), 2.82 (t, 2H, J= 7.2 Hz, CH2), 2.47 (t, 2H, J= 7.0 Hz, CH2), 1.98-1.60 (m, 4H, 2 x CH2). MS (ESI) m/z (%) : 272 [M+H, 100]+. (Z)-l-morpholinooctadec-9-en-l-one (5c)

Prepared by Procedure D

C22H4iN02 MW: 351.57

Colorless oil. Yield 98% (1.59 g). *H NMR (200 MHz, CDC13) δ = 5.31-5.25 (m, 2H, CH=CH), 3.62-3.57 (m, 6H, CH2OCH2, CHHNCHH), 3.40 (t, 2H, J= 5.0 Hz, CHHNCHH), 2.25 (t, 2H,/ = 7.4 Hz, CH2CO), 1.97-1.93 (m, 4H, CH2CH=CHCH2), 1.60-1.53 (m, 2H, C//2CH2CO), 1.26-1.21 (m, 20H, 10xCH2), 0.82 (t, 3H,/=6.2 Hz, CH3). 13C NMR (50 MHz, CDC13) δ = 171.6, 129.8, 129.5, 66.8, 66.5, 45.8, 41.7, 32.9, 31.7, 29.6, 29.5, 29.3, 29.2, 29.1, 28.9, 27.0, 25.0, 22.5, 13.9. (Z)-l-(Thiazol-2-yl)octadec-9-en-l-one (3c)

Prepared by Procedure E

Yield when the Weinreb amide was used: 70%

Yield when the morpholine amide was used: 70% 5-(Naphthalen-2-yl)-l-(thiazol-2-yl)pentan-l-one (3e)

Prepared by Procedure E

Ci8H17NOS MW: 295.40

Yellow solid. Yield 70% !H NMR (200 MHz, CDC13) δ = 7.97 (d, 1H, J = 3.0 Hz, ArH), 7.80-7.75 (m, 3H, ArH), 7.75-7.63 (m, 2H, ArH), 7.50-7.30 (m, 3H, ArH), 3.21 (t, 2H, J = 7.0 Hz, CH2), 2.83 (t, 2H, J= 6.8 Hz, CH2), 1.98-1.80 (m, 4H, 2 x CH2). 13C NMR (50 MHz, CDCI3) δ = 193.8, 167.1, 144.6, 139.6, 133.5, 131.9, 127.8, 127.5, 127.4, 127.3, 126.3, 126.1, 125.8, 125.0, 38.2, 35.7, 30.8, 23.6. MS (ESI) m/z (%) : 296 [M+H, 100]+. l-(Benzo[d]thiazol-2-yl)hexadecan-l-one (6a)

Prepared by Procedure E

C23H35NOS MW: 373.60 Yellowish solid.

Yield via Weinreb amide 60% (140 mg).

Yield via morpholine amide 85% (180 mg), m.p. : 74-76 °C. Ή NMR (200 MHz, CDC13) δ = 8.19 (d, 1H, J= 7.4 Hz, benzothiazole), 7.98 (d, 1H, J = 7.4 Hz, benzothiazole), 7.62-7.49 (m, 2H, benzothiazole), 3.27 (t, 2H, J = 12 Hz, CH2CO), 1.86-1.74 (m, 2H, C/72CH2CO), 1.44-1.21 (m, 24H, 12 x CH2), 0.88 (t, 3H, J= 6.0 Hz, CH3). 13C NMR (50 MHz, CDCI3) δ = 195.6, 166.6, 153.5, 137.2, 127.5, 126.8, 125.3, 122.4, 38.5, 31.9, 29.6, 29.6, 29.4, 29.3, 29.3, 29.1, 23.9, 22.6, 14.1. MS (ESI) m/z (%): 374 [M+H, 100]+. l-(Benzo[d]thiazol-2-yl)-5-phenylpentan-l-one (6b)

Prepared by Procedure E

Ci8Hi7NOS MW: 295.40 Yellow solid.

Yield via Weinreb amide 77% (204 mg).

Yield via morpholine amide 72% (126 mg), m.p. : 66-68 °C. *H NMR (200 MHz, CDCI3) δ = 8.19 (d, 1H, J = 7.4 Hz, benzothiazole), 7.96 (d, 1H, J= 7.6 Hz, benzothiazole), 7.61-7.47 (m, 2H, benzothiazole), 7.34-7.15 (m, 5H, Ph), 3.31 (t, 2H, J= 6.8 Hz, CH2CO), 2.70 (t, 2H, J= 7.4 Hz, PhCH2), 1.96-1.69 (m, 4H, 2 x CH2). 13C NMR (50 MHz, CDCI3) δ = 195.2, 166.3, 153.4, 142.0, 137.1, 128.3, 128.2, 127.5, 126.8, 125.6, 125.2, 122.3, 38.2, 35.5, 30.8, 23.4. MS (ESI) m/z (%): 296 [M+H, 100]+. (Z)- l-(Benzo [d] thiazol-2-yl)octadec-9-en- 1-one (6c)

Prepared by Procedure E

C25H37NOS MW: 399.63 Yellow oil.

Yield via Weinreb amide 70% (170 mg). Ή NMR (200 MHz, CDCI3) δ = 8.17 (d, 1H, J = 7.0 Hz, benzothiazole), 7.95 (d, 1H,J = 6.2 Hz, benzothiazole), 7.60-7.45 (m, 2H, benzothiazole), 5.42-5.27 (m, 2H, CH=CH), 3.26 (t, 2H, J = 7.4 Hz, CH2CO), 2.02-2.00 (m, 4H, CH2CH=CHCH2), 1.88-1.73 (m, 2H, CH2CK2CO), 1.43-1.25 (m, 20H, 10 x CH2), 0.87 (t, 3H, J= 6.4 Hz, CH3). 13C NMR (50 MHz, CDCI3) δ = 195.4, 166.5, 153.4, 137.1, 129.9, 129.6, 127.4, 126.8, 125.2, 122.3, 38.5, 31.8, 29.7, 29.6, 29.4, 29.2, 29.2, 29.1, 29.0, 27.1, 27.1, 23.8, 22.6, 14.0. MS (ESI) m/z (%) : 400 [M+H, 100]'. l-(Benzo|d]thiazol-2-yl)-5-(naphthalen-2-yl)pentan-l-one (6e)

Prepared by Procedure E

C22HI9NOS MW: 345.46

Yellow solid. Yield 72%. ‘H NMR (200 MHz, CDCI3) δ = 8.20 (d, 1H, J = 6.0 Hz, ArH), 7.97 (d, 1H, J= 8.0 Hz, ArH), 7.90-7.70 (m, 3H, ArH), 7.70-7.30 (m, 6H, ArH), 3.35 (t, 2H,J= 7.0 Hz, CH2), 2.90 (t, 2H, J= 6.8 Hz, CH2), 2.05-1.82 (m, 4H, 2 x CH2). 13C NMR (50 MHz, CDCI3) δ = 195.3, 166.4, 153.5, 139.6, 137.2, 133.5, 131.9, 127.8, 127.6, 127.5, 127.4, 127.3, 126.9, 126.4, 125.8, 125.3, 125.0, 122.4, 38.3, 35.8,30.7, 23.6. MS (ESI) m/z (%): 246 [M+H, 100]1.

Ethyl 2-(2-(l-hydroxyhexadecyl)thiazol-4-yl)acetate (14c)

Prepared by Procedure K

C23H4iN03S MW: 411.64 White solid. XH NMR (300 MHz, CDC13): δ = 7.15 (s, 1H, SCH), 4.97 (dd, Ji = 7.8 Hz, J2 = 4.5 Hz, 1H, C770H), 4.20 (q, J = 7.2 Hz, 2H, COOCH2), 3.82 (s, 2H, CH2COO), 2.07-1.78 (m, 2H CH2), 1.59-1.20 (m, 29H, 13xCH2, CH3), 0.89 (t, J= 6.3 Hz, 3H, CH3). 13C NMR (50 MHz, CDC13): δ = 174.98, 170.36, 148.18, 115.97, 71.95, 61.08, 38.32, 36.93, 31.91, 29.68, 29.66, 29.56, 29.49, 29.36, 25.20, 22.69, 14.14. MS (ESI) m/z (%): 412 [M+H, 100]+.

Ethyl 2-(2-(l-hydroxy-5-phenylpentyl)thiazol-4-yl)acetate (14d)

Prepared by Procedure K

Ci8H23N03S MW: 333.45

Pale yellow solid; Yield 44%. m.p. 53-55 °C !H NMR (200 MHz, CDC13): δ 7.35-7.07 (m, 6H, SCH, Ph), 4.93 (dd, Ji = 7.8 Hz, J2 = 4.8 Hz, 1H, C//OH), 4.18 (q, J = 7.0 Hz, COOCH2), 3.79 (s, 2H, CH2COO), 2.61 (t,J = 7.2 Hz, CH2Ph), 2.06-1.37 (m, 6H, 3xCH2), 1.26 (t, J = 7.2 Hz, 3H, CH3). 13C NMR (50 MHz, CDC13) δ 174.95, 170.37, 148.20, 142.38, 128.34, 128.24, 125.65, 116.00, 71.80, 61.08, 38.12, 36.90, 35.74, 31.19, 24.89, 14.15. MS (ESI) m/z (%): 334 [M+H, 100]+.

Ethyl 2-(2-palmitoylthiazol-4-yl)acetate (15c)

Prepared by Procedure B

C23H39NO3S MW: 409.63 White solid. Yield 90%. m.p. 46-48 °C XH NMR (300 MHz, CDC13): δ = 7.54 (s, 1H, SCH), 4.21 (q, J = 12 Hz, 2H, COOCH2), ), 3.90 (s, 2H, CH2COO), 3.12 (t, J = 7.5 Hz, 2H, CH2CO), 1.82-1.62 (m, 2H CH2), 1.55-1.19 (m, 27H, 12xCH2, CH3), 0.88 (t, J= 7.0 Hz, 3H, CH3). 13C NMR (50 MHz, CDC13): (5 = 194.09, 170.00, 166.52, 150.95, 123.56, 61.24, 38.43, 37.00, 31.91, 29.65, 29.47, 29.39, 29.35, 29.18, 23.91, 22.68, 14.13. MS (ESI) m/z (%): 410 [M+H, 100]+.

Ethyl 2-(2-(5-phenylpentanoyl)thiazol-4-yl)acetate (15d)

Prepared by Procedure B

Ci8H2iN03S MW: 331.43 White oil. Yield 81%. !H NMR (300 MHz, CDC13): δ = 7.55 (s, 1H, SCH), 7.34-7.16 (m, 5H, Ph), 4.22 (q, J= 12 Hz, 2H, COOCH2), 3.91 (s, 2H, CH2COO), 3.17 (t, J= 7.5 Hz, 2H, CH2CO), 2.68 (t, J= 12 Hz, 2H, CH2Ph), 1.85-1.63 (m, 4H 2xCH2), 1.30 (t,/ = 7.2 Hz, 3H, CH3). 13C NMR (50 MHz, CDC13): δ = 193.82, 169.99, 166.42, 150.99, 142.17, 128.39, 128.27, 125.71, 123.69, 61.26, 38.17, 36.99, 35.65, 30.92, 23.56, 14.16. MS (ESI) m/z (%): 332 [M+H, 99]+.

Ethyl 2-(2-(5-(biphenyl-4-yl)pentanoyl)thiazol-4-yl)acetate (15e)

Prepared by Procedure B

C24H25N03S MW: 407.53 White solid. XH NMR (200 MHz, CDC13): δ = 7.65-7.18 (m, 10H, Ar, SCH), 4.21 (q, J= 7.4 Hz, 2H, COOCH2), 3.90 (s, 2H, CH2COO), 3.18 (t, J= 6.6 Hz, CH2CO), 2.70 (t, J= 7.2 Hz, CH2Ph), 1.94-1.65 (m, 4H, 2xCH2), 1.28 (t,/ = 7.2 Hz, CH3). 13C NMR (50 MHz, CDC13): δ = 193.79, 169.95, 166.40, 151.01, 141.29, 141.06, 138.66, 128.80, 128.66, 127.01, 126.95, 123.67, 61.22, 38.15, 36.97, 35.25, 30.85, 23.57, 14.14. MS (ESI) m/z (%): 408 [M+H, 100]+. 2-palmitoylthiazole-4-carboxylic acid (15'a)

Prepared by Procedures L, then B

C20H33NO3S MW: 367.55 White solid. Yield 50%. m.p. 98-100 °C. XH NMR (200 MHz, CDC13): δ = 8.39 (s, 1H, CH), 3.25-3.00 (m, 2H, CH2), 1.801.55 (m, 2H, CH2), 1.40-1.00 (m, 24H, 12 x CH2), 0.88 (t, 3H, J= 6.8 Hz, CH3). 13C NMR (50 MHz, CDC13+CD30D): δ = 193.9, 166.4, 164.6, 151.5, 131.8, 37.9, 31.5, 29.2, 29.0, 28.9, 28.7, 23.2, 22.2, 13.4. MS (ESI) m/z (%): 366 [M-H, 100]“. 2-(5-Phenylpentanoyl)thiazole-4-carboxylic acid (15'b)

Prepared by Procedure M

Ci5H15N03S MW: 289.35

White solid. Yield 86% (25 mg). !H NMR (CDC13): δ = 8.55 (s, 2H, ArH, COOH), 7.30-7.10 (m, 5H, Ph), 3.26 (t, 2H, J= 6.8 Hz, CH2), 2.66 (t, 2H, J= 7.0 Hz, , CH2), 1.90-1.63 (m, 4H, 2 x CH2). 13C NMR (CDCI3): δ= 193.5, 167.8, 164.6, 147.4, 142.0, 134.9, 128.4, 128.3, 125.8, 38.2,35.6,30.7, 23.2. MS (ESI) m/z (%) : 290 [M+H, 47]+. 2-(2-Palmitoylthiazol-4-yl)acetic acid (15'c)

Prepared by Procedures L, then B

C2iH35N03S MW: 381.57 White solid. XH NMR (300 MHz, CDC13): δ 7.55 (s, 1H, SCH), 3.98 (s, 2H, CH2COO), 3.13 (t, J = 7.6 Hz, 2H, CH2CO), 1.82-1.69 (m, 2H, CH2), 1.43-1.18 (m, 24H, 12xCH2), 0.89 (t, ./= 6.9 Hz, 3H, CH3). MS (ESI) m/z (%): 336 [M-COOH-H, 100]', 380 [M-H, 46]'. 2-(2-(5-Phenylpentanoyl)thiazol-4-yl)acetic acid (15'd)

Prepared by Procedure M

c16h17no3s MW: 303.38 White oil. Yield 89%. *H NMR (300 MHz, CDC13): δ 7.49 (s, 1H, SCH), 7.35-7.08 (m, 5H, Ph), 3.88 (s, 2H, CH2COO), 3.11 (t, J= 7.5 Hz, 2H, CH2CO), 2.63 (t, J= 7.0 Hz, 2H, CH2Ph), 1.85-1.63 (m, 4H2xCH2). MS (ESI) m/z (%): 304 [M+H, 77]+. (5)-tert-Butyl 4-(benzyloxycarbonylamino)-5-(methoxy(methyl)amino)-5- oxopentanoate (43b)

Prepared by Procedure C

Cl9H28N206 MW: 380.44

Colorless oil. Yield 100%. *H NMR (200 MHz, CDC13) δ = 7.35-7.20 (m, 5H, ArH), 5.67 (d, 1H, J = 8.0 Hz, NH), 5.06 (s, 2H, CH2), 4.80-4.60 (m, 1H, CH), 3.73 (s, 3H, OMe), 3.15 (s, 3H, NMe), 2.40-1.70 (m, 4H, CH2), 1.38 (s, 9H, lBu). 13C NMR (50 MHz, CDC13) δ = 171.9, 155.9, 136.1, 128.3, 127.9, 127.8, 80.3, 66.6, 61.4, 50.3,31.9,31.0, 27.9, 27.4. MS (ESI) m/z (%) : 381 [M+H, 100]+. (S)-ter*-Butyl 5-(methoxy(methyl)amino)-5-oxo-4-(2- phenylacetamido)pentanoate (45b)

Prepared by Procedures V, then W

C19H28N205 MW: 364.44 Colorless oil. !H NMR (200 MHz, CDCI3) δ = 7.40-7.20 (m, 5H, ArH), 6.38 (d, 1H, J = 8.0 Hz, NH), 5.02-4.90 (m, 1H, CH), 3.65 (s, 3H, OMe), 3.55 (s, 2H, CH2), 3.18 (s, 3H, NMe), 2.25-1.70 (m, 4H, CH2), 1.40 (s, 9H, lBu). 13C NMR (50 MHz, CDCI3) δ = 172.1, 170.9, 166.3, 134.6, 129.3, 128.9, 127.2, 80.5, 61.6, 48.7, 43.6, 31.1, 28.0, 27.2. MS (ESI) m/z (%): 365 [M+H, 100]+. A-(2-(Benzo [d] thiazol-2-yl)-2-oxoethyl)-2-phenylacetainide (46a)

Prepared by Procedure E

C17H14N2O2S MW: 310.37 Orange solid. *H NMR (200 MHz, CDC13) δ = 8.11 (d, 1H, / = 8.0 Hz, ArH), 7.94 (d, 1H, / = 8.0 Hz, ArH), 7.65-7.40 (m, 2H, ArH), 7.39-7.20 (m, 5H, ArH), 6.34 (b, 1H, NH), 4.95 (d, 2H, /= 5.2 Hz, CH2), 3.67 (s, 2H, CH2). 13C NMR (50 MHz, CDCI3) δ = 189.7, 171.4, 163.1, 153.3, 136.9, 134.4, 129.5, 129.0, 128.1, 127.4, 127.1, 125.6, 122.3,46.8,43.5. MS (ESI) m/z (%) :311 [M+H, 100]+. (S)-tef7-Butyl 5-(benzo[d]thiazol-2-yl)-5-oxo-4-(2-phenylacetamido)pentanoate (46b)

Prepared by Procedure E

C24H26N204S MW: 438.54

Colorless Oil. Yield 50%. !H NMR (200 MHz, CDCI3) δ = 8.10 (d, 1H, J= 8.0 Hz, ArH), 7.91 (d, 1H, J= 8.0 Hz, ArH), 7.62-7.20 (m, 7H, ArH), 6.77 (d, 1H, J= 8.0 Hz, NH), 5.68-5.70 (m, 1H, CH), 3.61 (s, 2H, CH2), 2.50-1.98 (m, 4H, CH2), 1.38 (s, 9H, lBu). 13C NMR (50 MHz, CDCI3) δ = 192.5, 172.1, 170.9, 163.5, 153.2, 137.0, 134.4, 129.3, 128.8, 127.9, 127.2, 127.0, 125.8, 122.2, 80.7, 55.1, 43.4, 30.3, 30.6, 27.9, 27.3. MS (ESI) m/z (%) : 439 [M+H, 55]+. (S)-5-(Benzo [d] thiazol-2-y])-5-oxo-4-(2-phenylacetamido)pentanoic acid (47)

Prepared by Procedure X

C20H18N2O4S MW: 382.43

Yellow solid. Yield 50%. ‘H NMR (200 MHz, CDC13) <5 = 8.11 (d, 1H, J = 8.0 Hz, ArH), 7.94 (d, 1H, J= 8.0 Hz, ArH), 7.65-7.40 (m, 2H, ArH), 7.38-7.10 (m, 5H, ArH), 6.71 (d, 1H, J= 8.0 Hz, NH), 5.90-5.60 (m, 1H, CH), 3.63 (s, 2H, CH2), 2.55-2.25 (m, 3H, CH2), 2.20-1.90 (m, 1H, CH2). 13C NMR (50 MHz, CDCI3) δ = 192.3, 177.0, 171.6, 163.3, 153.3, 137.1, 134.2, 129.4, 129.0, 128.2, 127.5, 127.2, 126.1, 125.8, 122.3,55.2, 43.5,30.1,27.5. MS (ESI) m/z (%) : 381 [M-H, 100]'.

Some of the compounds above were tested using an in vitro CPLA2 enzyme activity assay.

In vitro cPLA2 assay

Assay for cPLA2 activity was performed by the use of sonicated vesicles of 1-palmitoyl-2-arachidonoyl-S’«-glyccrol-3-phosphorylcholine (100 μΜ) containing 100,000 cpm of l-palmitoyl-2-[l 14C]arachidonoyl.v«-glycerol-3-phosphorylcholine in 100 mM Hepes, pH 7.5, 80 μΜ Ca2, 2 mM dithiothreitol, and 0.1 mg/ml BSA as described. Following a 35-min incubation at 37 °C, the reaction was terminated (derived from Wijkander et al). The lower phase was separated by thin layer chromatography, and the spot corresponding to free [l-14C]arachidonic acid was visualized by digital imaging and quantified with a Phosphorlmager (Fuji Instruments). The source of CPLA2 enzyme was recombinant overexpression of the human gene for group IVa PLA2 in baculovirus insect cell expression system, as described in Abdullah et al.

Wijkander, J., and Sundler, R. (1991) Eur../. Biochem. 202, 873-880

Abdullah, K., et al. (1995) Human cytosolic phospholipase A2 expressed in insect cells is extensively phosphorylated on Ser-505. Biochim Biophys Acta. 1995 May ll;1244(l):157-64.

The results are presented below:

Further testing was carried out as follows:

Reagents

The Cell Culture SW982 model cell line at a confluent or spheroid state (Wada Y, 2005) was used since gene expression and generation of proinflammatory cytokines resemble RA-derived synovial fibroblast-like cells. AA release assay: lh preincubation at 50 and 25 μΜ - 4h IL-1B stimulation, repeated 2-3 times. Only inhibitors that showed a -50% inhibition in either of the initial two concentrations were further tested in a dose-response. IC50 is evaluated from dose-response inhibtions curves. PGE2 analysis PGE detection 2

Samples and controls were slowly thawed and diluted (between 1:1 and 1:2500) in the standard diluent. The maximal dilution was 1:10 for one step. That is why several intermediate dilutions were prepared. In the beginning all values were determined from duplicates. After having minimized technical errors, samples were only analyzed as individuals. All further steps, except for some minor corrections, were performed according to the manufacturer’s recommendations as can be found in the manual of the EIA kit. In order to optimize the results, the incubation time of the alkaline phosphatase substrate was prolonged by 15 minutes. During the incubation, the plates were kept in the dark. An example of the arrangements of the samples and controls is illustrated in the appendix. The read-out was carried out with a Multiscan plate reader (Ascent Labsystems) at wavelengths of 414 and 595 nm after 10 seconds shaking at 120 rpm. The corresponding software to obtain the data was the Ascent software for Multiscan, Version 2.4.1.

Data were processed using Microsoft Office Excel 2003 and SigmaPlot 10.0.

Claims (15)

1. Claims

   1. A compound of formula (Γ)

   (Γ) wherein X is S; R2 is selected from the group consisiting of H, OH, SH, nitro, NH2, NHCi. 6alkyl, N(Ci-6alkyl)2, halo, haloCi^alkyl, CN, Ci.6-alkyl, OCi„6alkyl, C2.6-alkenyl, C3.I0cycloalkyl, C6-ioaryl, Ci-6alkylC6-ioaryl, heterocyclyl, heteroaryl, CONH2, CONHCi.6alkyl, CON(Ci.6alkyl)2, OCOC^alkyl, C,.6alkylCOOH, C,.6alkylCOOC,. 6alkyl, and a group comprising a carboxyl, phosphate, phosphinate, sulfate, sulfonate, or tetrazolyl group; Ri is H or Ri and R2 taken together can form a 6-membered aromatic ring optionally substituted by up to 4 groups R5H; each R3' is the same or different and is selected from the group consisting of H, Cl-6 alkyl, C,.6alkylCOORa, halo, and CHal3; Ra is H or Ci_6 alkyl; each R5 is defined as for R2; Vris -O- Mi is absent or is a C5_|0 cyclic group or a C5-15 aromatic group (e.g.C6-i4 aromatic group); and R4 is selected from the group consisiting of H, a C)_i0alkyl group, alkylthio, and Ci-io alkoxy group; with the proviso that the group V1M1R4 as a whole provides at least 10 backbone atoms from the C(R3) group, or a salt, ester, solvate, or N-oxide, thereof; with the proviso that R4MiV|'C(R.3')2 is not oleyl or -(Clk^Ph.
2. 2. A compound as claimed in claim 1 in which R2 is selected from the group consisiting of COOH, COOCi^alkyl and Ci_6alkylCOOH.
3. 3. A compound as claimed in any preceding claim in which Rj is hydrogen.
4. 4. A compound as claimed in any preceding claim in which R2 is COOH, COOCi^alkyl and C|.6alkylCOOH.
5. 5. A compound as claimed in any one of claims 1 to 6 in which Rj and R2 can be taken together to form a ring system such as a phenyl ring or pyridine ring optionally substituted by 1 or 2 groups R5.
6. 6. A compound as claimed in any preceding claim in which each R3' or R3 is hydrogen or halo, especially fluoro.
7. 7. A compound as claimed in any preceding claim in which Mi is either absent or is an Ce-ioaryl group, especially a phenyl group.
8. 8. A compound as claimed in any preceding claim in which R4 is an H atom, Ci-ioalkyl group or an Ci_ioalkoxy group or alkylthio-.
9. 9. A method of treating a chronic inflammatory disorder comprising administering to a patient in need thereof an effective amount of a compound of fonnula (Γ) as claimed in any one of claims 1 to 8.
10. 10. A method of treating atopic dennatitis, allergic contact dermatitis, seborrheic dermatitis, pityriasis rosea, lichen planus or drug eruptions comprising administering to a patient in need thereof an effective amount of a compound of formula (Γ) as claimed in any one of claims 1 to 8.
11. 11. A method of treating arthritis, dermatoses, inflammatory CNS diseases, multiple sclerosis, chronic obstructive pulmonary disease, chronic lung inflammatory conditions, inflammatory bowel disease such as ulcerative colitis and crohns disease or cardiovascular disease comprising administering to a patient in need thereof an effective amount of a compound of formula (Γ) as claimed in any one of claims 1 to 8.
12. 12. A method as claimed in claim 9 wherein said chronic inflammatory condition is glomerulonephritis, rheumatoid arthritis or psoriasis.
13. 13. A pharmaceutical composition comprising a compound of formula (Γ) including the disclaimer as claimed in any one of claims 1 to 8.
14. 14. Use of a compound of formula (Γ) as claimed in any one of claims 1 to 8 in the manufacture of a medicament for the treatment of a chronic inflammatory condition.
15. 15. A compound of formula:

    wherein Mi is phenyl; R.2 is COOCi^alkyl or Ci-6alkylCOOCi_6alkyl; R4 is H, a linear C 1.20 alkyl group, Cmo alkoxy, or SC i_2o alkyl group or C2-2o mono or multiple unsaturated alkenyl group; or a salt, ester, solvate or prodrug thereof.