CN109796422A - A kind of light-catalyzed reaction is preparing the application in oxazolidine structural compounds - Google Patents

A kind of light-catalyzed reaction is preparing the application in oxazolidine structural compounds Download PDF

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CN109796422A
CN109796422A CN201910224814.6A CN201910224814A CN109796422A CN 109796422 A CN109796422 A CN 109796422A CN 201910224814 A CN201910224814 A CN 201910224814A CN 109796422 A CN109796422 A CN 109796422A
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heterocycle
compound
alkyl
yuan
aryl
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CN109796422B (en
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杨锦明
吴振
冯雪馨
沈志良
胡朝俊
杨子健
王庆东
邱悦
赵玉军
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Nanjing Tech University
Yancheng Teachers University
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Yancheng Jinming Pharmaceutical Co Ltd
Nanjing Tech University
Yancheng Teachers University
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Abstract

The present invention relates to a kind of light-catalyzed reactions to prepare the application in oxazolidine structural compounds, one kind is mainly provided under illumination condition, alkamine compound, silyl enol ether and three component reaction of perfluoroalkyl iodides prepare the reaction of oxazolidine structural compounds, this method process conditions are easy, it is easily operated, and yield is good, has wide functional group tolerance and good compatibility.

Description

A kind of light-catalyzed reaction is preparing the application in oxazolidine structural compounds
Technical field
The invention belongs to chemical and medicine industry field, it is related under illumination condition, alkamine compound, silyl enol ether and perfluor alkane Three component reaction of base iodine prepares the reaction of oxazolidine structural compounds, and this method process conditions are easy, easily operated, and yield is good It is good, there is wide functional group tolerance and good compatibility.
Background technique
The N- heterocycle of saturation, the especially oxazolidine of highly functional cause the pass of people in academia and industry Note because they often make specific drugs and important bioactive molecule have unexpected activity, and is also used extensively In asymmetric syntheses.
Usually, substituted pro-drugs are constructed by ortho position amino alcohol direct alkylation, but due to numerous The presence of trivial step and side reaction and keep its availability in the industry limited, for example, preparing specific organohalogen compounds and carbonyl Based compound.On the other hand, it is by excessive metalcatalyzing or by the reaction of the free radical activation c h bond adjacent with N atom It prepares pro-drugs and new thinking is provided, however, the use of the metallic catalyst of stoichiometry such as copper or tin is in certain journey The implementation of strategies is also limited on degree.Prior, in the presence of apparent difficulty, i.e., these methods are constructing chiral quaternary carbon center Just asymmetric catalyst is used, this is also still a difficult task.Therefore, what urgent need exploitation was new prepares pro-drugs Method,
On the other hand, fluorine atom is introduced on organic molecule or the fluoro-alkyl of high substituted degree may be to organic molecule Chemical and physical features generate deep effect.
Based on above content, the present invention provide it is a kind of using three component of visible light-inducing directly construct C-2 fluoroalkylation dislike Method derived from oxazolidine.This method process conditions are easy, easily operated, and yield is good, with wide functional group tolerance and Good compatibility, meanwhile, it can the very effective fluoro-alkyl that fluorine atom or high substituted degree are introduced in organic molecule.
Summary of the invention
The present invention provides a kind of preparation method of compound shown in formula 4,
Including under the conditions of photochemical catalyst, 1 compound of formula, 2 compound of formula and 3 compound of formula react 4 compound of acquisition formula The step of,
Wherein, R1、R2Selected from hydrogen, alkyl, alkenyl, alkynyl, naphthenic base, heterocycle, aryl and heteroaryl, wherein described Alkyl, alkenyl, alkynyl, naphthenic base, heterocycle, aryl and heteroaryl optionally by selected from alkyl, halogen, hydroxyl, amino, oxygroup, Replaced one or more substituent groups in carboxyl, nitro, cyano, alkoxy, naphthenic base, heterocycle, aryl and heteroaryl, or Person, R1And R2Carbon atom adjacent thereto is formed together 5 yuan to 10 yuan carbocyclic rings, heterocycle or condensed ring, preferably 6 yuan to 8 yuan carbocyclic rings, heterocycles Or condensed ring, the carbocyclic ring, heterocycle or condensed ring optionally by selected from alkyl, halogen, hydroxyl, amino, oxygroup, carboxyl, nitro, cyano, Replaced one or more substituent groups in alkoxy, naphthenic base, heterocycle, aryl and heteroaryl;
R3、R4、R5, R6Selected from hydrogen, alkyl, alkenyl, alkynyl, naphthenic base, heterocycle, aryl and heteroaryl, wherein described Alkyl, alkenyl, alkynyl, naphthenic base, heterocycle, aryl and heteroaryl optionally by selected from alkyl, halogen, hydroxyl, amino, oxygroup, Replaced one or more substituent groups in carboxyl, nitro, cyano, alkoxy, naphthenic base, heterocycle, aryl and heteroaryl,
Alternatively,
R5And R6Carbon atom adjacent thereto is formed together 5 yuan to 10 yuan carbocyclic rings, heterocycle or condensed ring, preferably 6 yuan to 8 yuan carbocyclic rings, Heterocycle or condensed ring, the carbocyclic ring, heterocycle or condensed ring are optionally selected from alkyl, halogen, hydroxyl, amino, oxygroup, carboxyl, nitro, cyanogen Replaced one or more substituent groups in base, alkoxy, naphthenic base, heterocycle, aryl and heteroaryl;
Alternatively,
R3And R6Carbon atom adjacent thereto is formed together 5 yuan to 10 yuan carbocyclic rings, heterocycle or condensed ring, preferably 6 yuan to 8 yuan carbocyclic rings, Heterocycle or condensed ring, the carbocyclic ring, heterocycle or condensed ring are optionally selected from alkyl, halogen, hydroxyl, amino, oxygroup, carboxyl, nitro, cyanogen Replaced one or more substituent groups in base, alkoxy, naphthenic base, heterocycle, aryl and heteroaryl;
P is selected from trimethyl silicon substrate, triisopropylsilyl or dimethyl tertiary butyl silicon substrate, preferably is selected from triisopropylsilyl;
N is the integer between 2~10.
Further, the photochemical catalyst is selected from acriflavine.
In some embodiments, it is the 0.1~1% of 3 compound mole of formula that light, which urges the dosage of agent, in the reaction, can Think 0.1,0.2,0.3,0.4,0.5,0.6,0.7,0.8,0.9,1.0%.
In some embodiments, R described in the method for the invention1Selected from phenyl, naphthalene and pyridyl group, the benzene Base, naphthalene and pyridyl group are optionally selected from C1-6Alkyl (such as methyl, ethyl or isopropyl), halogen (such as Cl, Br or I), hydroxyl (- OH), amino (- NH2), carboxyl, nitro, cyano, C1-6Alkoxy (such as methoxyl group, ethyoxyl), C3-8Naphthenic base (such as cyclopropyl, Cyclohexyl), C3-8One in heterocycle (such as pyrrole radicals, furyl), aryl (such as phenyl, naphthalene) and heteroaryl (such as pyridyl group) Replaced a or multiple substituent groups.
In some embodiments, R described in the method for the invention2Selected from hydrogen.
In some embodiments, R1And R2Carbon atom adjacent thereto is formed together hexamethylene, and the hexamethylene is preferably by benzene Replaced at least one of base, such as flowering structure is formed:
In some embodiments, R described in the method for the invention3、R4、R5, R6Selected from hydrogen, C1-6Alkyl (such as methyl, Ethyl or isopropyl), C2-8Alkenyl, C2-8Alkynyl, C3-8Naphthenic base (such as cyclopropyl, cyclohexyl), C3-8Heterocycle (such as pyrrole radicals, Furyl), aryl (such as phenyl, naphthalene) and heteroaryl (such as pyridyl group), wherein the alkyl, alkenyl, alkynyl, naphthenic base, Heterocycle, aryl and heteroaryl optionally by selected from alkyl, halogen, hydroxyl, amino, oxygroup, carboxyl, nitro, cyano, alkoxy, Replaced one or more substituent groups in naphthenic base, heterocycle, aryl and heteroaryl.
In some embodiments, the compound of formula 3 described in the method for the invention is selected from:
In some embodiments, the formula 4 is mixed body, and further, the dr of compound shown in the formula 4 is (non-right Reflect the ratio of isomers) value is greater than or equal to 1:1, can be 1:1,2:1,3:1,4:1,5:1,6:1,7:1,8:1,9:1,10: 1,11:1,12:1,13:1,14:1,15:1,16:1,17:1,18:1,19:1,20:1 or higher, preferably greater than 20:1.
Further, the compound of formula 4 described in the method for the invention is selected from:
It on the other hand, further include alkali in reaction of the present invention, the presence of alkali is conducive to going on smoothly for reaction, and shows more Effect.In some embodiments, the alkali be selected from triethylene diamine (DABCO), diisopropylamine (iPr2NH), preferred triethylene Diamines.
Further, reaction solvent for use of the present invention is selected from acetonitrile, n,N-Dimethylformamide, acetone and tetrahydro furan It mutters, preferably acetonitrile.
Light emitting diode can provide the light source of different frequency, wave band or watt, reaction of the present invention for illumination reaction Light source used is from 4.5 watts of white light-emitting diodes.
In other embodiments, reaction temperature of the present invention is selected from 10~50 DEG C, can for 10,15,20,25, 30,35,40,45 and 50, preferably 15~30 DEG C.
In the preferred scheme, the method for the invention is included in photochemical catalyst acriflavine (Acriflavine), alkali Triethylene diamine, under conditions of acetonitrile as solvents, 1 compound of formula, 2 compound of formula and 3 compound of formula react 4 compound of acquisition formula The step of.
On the other hand, 2~8 equivalents of the dosage of alkali for 3 compound mole of formula, Ke Yiwei in the method for the invention 2,3,4,5,6,7 and 8 or the molar ratio of alkali and 3 compound of formula be 2:1~8:1.
In some embodiments, the molar ratio of 2 compound of the method for the invention Chinese style and 3 compound of formula be 1:1~ 5:1 can be 1:1,2:1,3:1,4:1 and 5:1.
In some embodiments, the molar ratio of 3 compound of the method for the invention Chinese style and 1 compound of formula be 1:1~ 2:1 can be 1:1,1.1:1,1.2:1,1.3:1,1.4:1,1.5:1,1.6:1,1.7:1,1.8:1,1.9:1 and 2:1.
Further, in preparation method of the present invention further include any in being filtered, washed, be concentrated, dry or purifying Step obtains 4 compound of target product formula of purifying.
The present invention also provides a kind of preparation method of compound shown in formula 4,
Including, the step of 1 ' compound of formula is converted into 1 compound of formula,
Then under the conditions of photochemical catalyst, 1 compound of formula, 2 compound of formula and 3 compound of formula react 4 compound of acquisition formula The step of,
Further, the method for 4 compound of preparation formula is " one pot of multistep processes ", i.e., in same reaction system, is during which not necessarily to Subsequent reaction occurs for the step of isolated or purified, continuity,
In some embodiments, the reagent choosing of P functional group is provided in the step of 1 ' compound of formula is converted into 1 compound of formula From but be not limited to tert-butyl dimethyl silyl triflate (TBSOTf), triisopropylsilyl triflate (TIPSOTf) or Trimethylsilyl trifluoromethanesulfonate (TMSOTf).
In some embodiments, the molar ratio of 1 ' compound of formula and the reagent of offer P functional group is between 1:1~1:3 Arbitrary value, including but not limited to 1:1,1:1.5,1:2,1:2.5 and 1:3.
In some embodiments, solvent or used molten is not used in the step of 1 ' compound of formula is converted into 1 compound of formula Agent is selected from but not limited to ethyl or tetrahydrofuran.
Further, in order to be conducive to the formation of silyl enol ether, there are also alkali in reaction, the alkali is selected from but not limited to three second Amine, triisopropylamine or pyridine.
On the other hand, the formation temperature of the silyl enol ether is selected from 10~50 DEG C, can for 10,15,20,25,30, 35,40,45 and 50, preferably 15~30 DEG C.
Another aspect of the present invention provides a kind of method for preparing drug, fragrance and pesticide, including formula of the present invention 4 The preparation method of shown compound.
Unless stated to the contrary, the term used in the specification and in the claims has following meanings.
Term " alkyl " refers to saturated aliphatic hydrocarbons group, is the linear chain or branched chain group comprising 1 to 20 carbon atom, excellent Select the alkyl containing 1 to 12 carbon atom.Non-limiting example includes methyl, ethyl, n-propyl, isopropyl, normal-butyl, isobutyl Base, tert-butyl, sec-butyl, n-pentyl, 1,1- dimethyl propyl, 1,2- dimethyl propyl, 2,2- dimethyl propyl, 1- ethyl third Base, 2- methyl butyl, 3- methyl butyl, n-hexyl, 1- Ethyl-2-Methyl propyl, 1,1,2- thmethylpropyl, 1,1- dimethyl Butyl, 1,2- dimethylbutyl, 2,2- dimethylbutyl, 1,3- dimethylbutyl, 2- ethyl-butyl, 2- methyl amyl, 3- first Base amyl, 4- methyl amyl, 2,3- dimethylbutyl, n-heptyl, 2- methylhexyl, 3- methylhexyl, 4- methylhexyl, 5- first Base hexyl, 2,3- dimethyl amyl group, 2,4- dimethyl amyl group, 2,2- dimethyl amyl group, 3,3- dimethyl amyl group, 2- ethyl penta Base, 3- ethylpentyl, n-octyl, 2,3- dimethylhexanyl, 2,4- dimethylhexanyl, 2,5- dimethylhexanyl, 2,2- dimethyl Hexyl, 3,3- dimethylhexanyl, 4,4- dimethylhexanyl, 2- ethylhexyl, 3- ethylhexyl, 4- ethylhexyl, 2- methyl -2- Ethylpentyl, 2- methyl -3- ethylpentyl, n-nonyl, 2- methyl -2- ethylhexyl, 2- methyl -3- ethylhexyl, 2,2- bis- Ethylpentyl, positive decyl, 3,3- diethylhexyl, 2,2- diethylhexyl and its various branched isomers etc..More preferably Low alkyl group containing 1 to 6 carbon atom, non-limiting embodiment include methyl, ethyl, n-propyl, isopropyl, normal-butyl, Isobutyl group, tert-butyl, sec-butyl, n-pentyl, 1,1- dimethyl propyl, 1,2- dimethyl propyl, 2,2- dimethyl propyl, 1- second Base propyl, 2- methyl butyl, 3- methyl butyl, n-hexyl, 1- Ethyl-2-Methyl propyl, 1,1,2- thmethylpropyl, 1,1- bis- Methyl butyl, 1,2- dimethylbutyl, 2,2- dimethylbutyl, 1,3- dimethylbutyl, 2- ethyl-butyl, 2- methyl amyl, 3- methyl amyl, 4- methyl amyl, 2,3- dimethylbutyl etc..Alkyl can be it is substituted or non-substituted, when substituted, Substituent group can be substituted on any workable tie point, and the substituent group is preferably one or more following groups, Independently selected from alkyl, alkenyl, alkynyl, alkoxy, alkylthio group, alkyl amino, halogen, sulfydryl, hydroxyl, nitro, cyano, cycloalkanes Base, Heterocyclylalkyl, aryl, heteroaryl, cycloalkyloxy, heterocyclylalkoxy groups, cycloalkylthio, heterocycle alkylthio group, oxo base, carboxyl or Carboxylate.
Term " naphthenic base " refers to the unsaturated monocycle of saturation or part or polycyclic cyclic hydrocarbon substituent, cycloalkyl ring include 3 to 20 carbon atoms, preferably comprise 3 to 12 carbon atoms, more preferably include 3 to 6 carbon atoms.Monocyclic cycloalkyl it is non-limiting Example includes cyclopropyl, cyclobutyl, cyclopenta, cyclopentenyl, cyclohexyl, cyclohexenyl group, cyclohexadienyl, suberyl, cycloheptyl Trialkenyl, cyclooctyl etc.;Polycyclic naphthene base includes the naphthenic base of loop coil, condensed ring and bridged ring.
Term " heterocycle " refers to the unsaturated monocycle of saturation or part or polycyclic cyclic hydrocarbon substituent, and it includes 3 to 20 rings Atom, wherein one or more annular atoms are the hetero atom selected from nitrogen, oxygen or S (O) m (wherein m is integer 0 to 2), but are not wrapped The loop section of-O-O- ,-O-S- or-S-S- are included, remaining annular atom is carbon.3 to 12 annular atoms are preferably comprised, wherein 1~4 It is hetero atom;It more preferably include 3 to 6 annular atoms.The non-limiting example of monocyclic heterocycles base includes pyrrolidinyl, imidazolidine Base, tetrahydrofuran base, tetrahydro-thienyl, glyoxalidine base, dihydrofuryl, pyrazoline base, pyrrolin base, piperidyl, Piperazinyl, morpholinyl, thio-morpholinyl, high piperazine base etc., preferably piperidyl, pyrrolidinyl.Multiring heterocyclic includes loop coil, thick The heterocycle of ring and bridged ring.
Term " aryl " refers to that 6 to 14 yuan of full carbon monocycles of the pi-electron system with conjugation or fused polycycle are (namely shared The ring of adjacent carbon atoms pair) group, preferably 6 to 10 yuan, such as phenyl and naphthalene.
Aryl can be substituted or non-substituted, and when substituted, substituent group is preferably one or more following groups, It is independently selected from alkyl, alkenyl, alkynyl, alkoxy, alkylthio group, alkyl amino, halogen, sulfydryl, hydroxyl, nitro, cyano, ring Alkyl, Heterocyclylalkyl, aryl, heteroaryl, cycloalkyloxy, heterocyclylalkoxy groups, cycloalkylthio, heterocycle alkylthio group, carboxyl or carboxylic acid Ester group, preferably phenyl.
Term " heteroaryl " refers to the heteroaromatic system comprising 1 to 4 hetero atom, 5 to 14 annular atoms, and wherein hetero atom selects From oxygen, sulphur and nitrogen.Heteroaryl is preferably 5 to 12 yuan, such as imidazole radicals, furyl, thienyl, thiazolyl, pyrazolyl, oxazole Base, pyrrole radicals, tetrazole radical, pyridyl group, pyrimidine radicals, thiadiazoles, pyrazinyl etc., preferably imidazole radicals, pyrazolyl, pyrimidine radicals or thiophene Oxazolyl;More preferably pyrazolyl or thiazolyl.
Heteroaryl can be it is optionally replacing or non-substituted, when substituted, substituent group be preferably it is one or more with Lower group, independently selected from alkyl, alkenyl, alkynyl, alkoxy, alkylthio group, alkyl amino, halogen, sulfydryl, hydroxyl, nitro, Cyano, naphthenic base, Heterocyclylalkyl, aryl, heteroaryl, cycloalkyloxy, heterocyclylalkoxy groups, cycloalkylthio, heterocycle alkylthio group, carboxyl Or carboxylate.
Term " alkoxy " refers to-O- (alkyl) and-O- (non-substituted naphthenic base), and wherein alkyl is as defined above. The non-limiting example of alkoxy includes: methoxyl group, ethyoxyl, propoxyl group, butoxy, cyclopropyl oxygroup, cyclobutoxy group, penta oxygen of ring Base, cyclohexyloxy.Alkoxy can be optionally replacing or non-substituted, and when substituted, substituent group is preferably one or more A following group, independently selected from alkyl, alkenyl, alkynyl, alkoxy, alkylthio group, alkyl amino, halogen, sulfydryl, hydroxyl, Nitro, cyano, naphthenic base, Heterocyclylalkyl, aryl, heteroaryl, cycloalkyloxy, heterocyclylalkoxy groups, cycloalkylthio, heterocycle alkane sulphur Base, carboxyl or carboxylate.
Term " hydroxyalkyl " refers to the alkyl being optionally substituted by a hydroxyl group, and wherein alkyl is as defined above.
Term " halogenated alkyl " refers to the alkyl being optionally substituted by halogen, and wherein alkyl is as defined above.
Term " hydroxyl " refers to-OH group.
Term " halogen " refers to fluorine, chlorine, bromine or iodine.
Term " amino " refers to-NH2
Term " cyano " refers to-CN.
Term " nitro " refers to-NO2
" optional " or " optionally " mean event or environment described later can with but need not occur, which includes The occasion that the event or environment occur or do not occur.For example, meaning that alkyl can be with " optionally by alkyl-substituted heterocyclic group " But necessarily exist, the explanation include heterocyclic group by alkyl-substituted situation and heterocyclic group not by alkyl-substituted situation.
" substituted " refers to one or more hydrogen atoms in group, preferably at most 5, more preferably 1~3 hydrogen atom Replaced independently of one another by the substituent group of respective number.Self-evident, substituent group is only in their possible chemical position, this Field technical staff, which can determine in the case where not paying excessive make great efforts and (pass through experiment or theoretical), may or impossible take Generation.It may be unstable when for example, amino or hydroxyl with free hydrogen are in conjunction with the carbon atom with unsaturated (such as olefinic) key Fixed.
Agents useful for same or solvent of the present invention may be from commercial sources, or be prepared according to literature method.
The structure of compound is by nuclear magnetic resonance (NMR) or/and mass spectrum (MS) come what is determined.NMR is displaced (δ) with 10-6 (ppm) unit provides.The measurement of NMR is to use Bruker AVANCE-400 nuclear magnetic resonance spectrometer, and measurement solvent is deuterated dimethyl sulfoxide (DMSO-d6), deuterated chloroform (CDCl3), deuterated methanol (CD3OD), inside it is designated as tetramethylsilane (TMS);The measurement of MS is used FINNIGAN LCQAd (ESI) mass spectrograph (manufacturer: Thermo, model: Finnigan LCQ advantage MAX).
Column chromatography is generally carrier or 100-200 mesh acidity or alkaline oxygen using 200~300 mesh silica gel of Yantai Huanghai Sea silica gel Change aluminium.
Specific embodiment
The present invention is explained in detail below with reference to specific example, so that this hair is more fully understood in those skilled in the art Bright specific example is only used to illustrate the technical scheme of the present invention, and does not limit the present invention in any way.
Embodiment 1:
Note: TIPS, triisopropylsilyl
In 5mL reaction flask, by silyl enol ether compound 1a (0.6mmol), perfluorinated butane base iodine 2a (0.9mmol), β- The stirring in acetonitrile (2.0mL) of alkamine compound 3a (0.3mmol), alkali (1.2mmol) and variety classes photochemical catalyst is mixed It closes, through N2Displacement is placed on irradiation under 4.5 watts of white light-emitting diodes for 3 times and is stirred to react 24 hours, and concentrated reaction solution leads to The yield of NMR detection method analysis gained sample is crossed, dr (ratio of diastereoisomer) is greater than 20:1.Data are as shown in table 1 below:
Table 1
Note: b, by Isosorbide-5-Nitrae-dimethoxy benzene as internal standard compound,1H NMR detects alkyl indium and closes object;C, separation yield (silicon Rubber column gel column purifying, ethyl acetate/petroleum ether mobile phase);D, trimethylsilyl replace three isopropyl silicon substrates;E, three dislanyls replacement three Isopropyl silicon substrate;Dimethyl tertiary butyl silicon substrate replaces three isopropyl silicon substrates.
Compound 4a characterize data:
IR (KBr) :=3331,2928,1679,1228,744,688cm-1
1H NMR (400MHz, CDCl3): δ=7.71-7.66 (m, 2H), 7.58-7.51 (m, 1H), 7.42-7.36 (m, 2H), 7.34 (d, J=7.3Hz, 1H), 7.27-7.24 (m, 1H), 7.20 (dd, J=7.3,1.2Hz, 1H), 6.93 (d, J= 7.4Hz, 1H), 5.11-5.01 (m, 1H), 4.96-4.84 (m, 1H), 3.88-3.72 (m, 2H), 2.99 (dd, J=17.7, 6.9Hz, 1H), 2.84 (d, J=13.8Hz, 1H), 2.62-2.48 (m, 1H) ppm.
19F NMR (376MHz, CDCl3): δ=- 80.76 (t, J=10.5Hz, 3F) ,-119.29-- 121.63 (m, 2F), -124.22 (t, J=4.7Hz, 2F) ppm.
13C NMR (100MHz, CDCl3): δ=196.9,141.1,140.4,137.2,133.5,128.8,128.8, (128.3,127.5,125.1,124.8,98.3 t, JC-F=22.9Hz), 84.3,68.5,38.4 (m), 38.2ppm; carbons corresponding to the C3F7group cannot be identified due to C-F coupling.
HRMS(EI,m/z):calcd for C21H17F7NO2[M+H]+448.1142,found:448.1147.
Embodiment 2
In 5mL reaction flask, by silyl enol ether compound 1b (0.6mmol), perfluorinated butane base iodine 2a (0.9mmol), β- Alkamine compound 3a (0.3mmol), triethylene diamine (DABCO) (134.5mg, 1.2mmol) and acriflavine (0.2mg, It 0.0009mmol) is stirred in acetonitrile (2.0mL), through N2It replaces 3 times and is placed under 4.5 watts of white light-emitting diodes and shine It penetrates and is stirred to react 36 hours, TLC is detected after completion of the reaction, and concentrated reaction solution is purified by silica gel column chromatography (ethyl acetate/stone Oily ether is mobile phase) obtain sample, yield 68%.
IR (KBr) :=3403,2960,1615,1228,744,624cm-1.
1H NMR (400MHz, CDCl3): δ=7.54-7.48 (m, 2H), 7.29-7.21 (m, 3H), 7.19-7.15 (m, 1H), 7.11 (t, J=7.3Hz, 1H), 6.83 (d, J=7.4Hz, 1H), 5.02-4.91 (m, 1H), 4.80 (t, J=5.5Hz, 1H), 3.72-3.65 (m, 1H), 3.58 (d, J=4.7Hz, 1H), 2.97-2.85 (m, 1H), 2.72 (d, J=13.6Hz, 1H), 2.44 (d, J=17.7Hz, 1H) ppm.
19F NMR (376MHz, CDCl3): δ=- 80.78 (t, J=10.6Hz, 3F) ,-118.10-- 122.22 (m, 2F), -124.20 (dt, J=6.1,3.4Hz, 2F) ppm.
13C NMR (100MHz, CDCl3): δ=195.6,141.2,140.2,140.1,135.4,130.3,128.8, (128.6,127.5,125.0,124.8,98.0 t, JC-F=24.3Hz), 84.4,68.3,38.8 (m), 38.1ppm; carbons corresponding to the C3F7group cannot be identified due to C-F coupling.
HRMS(EI,m/z):calcd for C21H16ClF7NO2[M+H]+482.0752,found:482.0758.
Embodiment 3
In 5mL reaction flask, by silyl enol ether compound 1c (0.6mmol), perfluorinated butane base iodine 2a (0.9mmol), β- Alkamine compound 3a (0.3mmol), triethylene diamine (DABCO) (134.5mg, 1.2mmol) and acriflavine (0.2mg, It 0.0009mmol) is stirred in acetonitrile (2.0mL), through N2It replaces 3 times and is placed under 4.5 watts of white light-emitting diodes and shine It penetrates and is stirred to react 28 hours, TLC is detected after completion of the reaction, and concentrated reaction solution is purified by silica gel column chromatography (ethyl acetate/stone Oily ether is mobile phase) obtain sample 4c, yield 55%.Dr (ratio of diastereoisomer) is greater than 20:1.
Embodiment 4
In 5mL reaction flask, by silyl enol ether compound 1d (0.6mmol), perfluorinated butane base iodine 2a (0.9mmol), β- Alkamine compound 3a (0.3mmol), triethylene diamine (DABCO) (134.5mg, 1.2mmol) and acriflavine (0.2mg, It 0.0009mmol) is stirred in acetonitrile (2.0mL), through N2It replaces 3 times and is placed under 4.5 watts of white light-emitting diodes and shine It penetrates and is stirred to react 36 hours, TLC is detected after completion of the reaction, and concentrated reaction solution is purified by silica gel column chromatography (ethyl acetate/stone Oily ether is mobile phase) obtain sample 4d, yield 63%.Dr (ratio of diastereoisomer) is greater than 20:1.
Embodiment 5
In 5mL reaction flask, by silyl enol ether compound 1e (0.6mmol), perfluorinated butane base iodine 2a (0.9mmol), β- Alkamine compound 3a (0.3mmol), triethylene diamine (DABCO) (134.5mg, 1.2mmol) and acriflavine (0.2mg, It 0.0009mmol) is stirred in acetonitrile (2.0mL), through N2It replaces 3 times and is placed under 4.5 watts of white light-emitting diodes and shine It penetrates and is stirred to react 36 hours, TLC is detected after completion of the reaction, and concentrated reaction solution is purified by silica gel column chromatography (ethyl acetate/stone Oily ether is mobile phase) obtain sample 4e, yield 60%.Dr (ratio of diastereoisomer) is greater than 20:1.
Embodiment 6
In 5mL reaction flask, by silyl enol ether compound 1f (0.6mmol), perfluorinated butane base iodine 2a (0.9mmol), β- Alkamine compound 3a (0.3mmol), triethylene diamine (DABCO) (134.5mg, 1.2mmol) and acriflavine (0.2mg, It 0.0009mmol) is stirred in acetonitrile (2.0mL), through N2It replaces 3 times and is placed under 4.5 watts of white light-emitting diodes and shine It penetrates and is stirred to react 36 hours, TLC is detected after completion of the reaction, and concentrated reaction solution is purified by silica gel column chromatography (ethyl acetate/stone Oily ether is mobile phase) obtain sample 4f, yield 51%.Dr (ratio of diastereoisomer) is greater than 20:1.
Embodiment 7
In 5mL reaction flask, by silyl enol ether compound 1g (0.6mmol), perfluorinated butane base iodine 2a (0.9mmol), β- Alkamine compound 3a (0.3mmol), triethylene diamine (DABCO) (134.5mg, 1.2mmol) and acriflavine (0.2mg, It 0.0009mmol) is stirred in acetonitrile (2.0mL), through N2It replaces 3 times and is placed under 4.5 watts of white light-emitting diodes and shine It penetrates and is stirred to react 36 hours, TLC is detected after completion of the reaction, and concentrated reaction solution is purified by silica gel column chromatography (ethyl acetate/stone Oily ether is mobile phase) obtain sample 4g, yield 53%.Dr (ratio of diastereoisomer) is greater than 20:1.
Embodiment 8
In 5mL reaction flask, by silyl enol ether compound 1h (0.6mmol), perfluorinated butane base iodine 2a (0.9mmol), β- Alkamine compound 3a (0.3mmol), triethylene diamine (DABCO) (134.5mg, 1.2mmol) and acriflavine (0.2mg, It 0.0009mmol) is stirred in acetonitrile (2.0mL), through N2It replaces 3 times and is placed under 4.5 watts of white light-emitting diodes and shine It penetrates and is stirred to react 34 hours, TLC is detected after completion of the reaction, and concentrated reaction solution is purified by silica gel column chromatography (ethyl acetate/stone Oily ether is mobile phase) obtain sample 4h, yield 54%.Dr (ratio of diastereoisomer) is greater than 20:1.
Embodiment 9
In 5mL reaction flask, by silyl enol ether compound 1i (0.6mmol), perfluorinated butane base iodine 2a (0.9mmol), β- Alkamine compound 3a (0.3mmol), triethylene diamine (DABCO) (134.5mg, 1.2mmol) and acriflavine (0.2mg, It 0.0009mmol) is stirred in acetonitrile (2.0mL), through N2It replaces 3 times and is placed under 4.5 watts of white light-emitting diodes and shine It penetrates and is stirred to react 24 hours, TLC is detected after completion of the reaction, and concentrated reaction solution is purified by silica gel column chromatography (ethyl acetate/stone Oily ether is mobile phase) obtain sample 4i, yield 48%.Dr (ratio of diastereoisomer) is greater than 20:1.
Embodiment 10
In 5mL reaction flask, by silyl enol ether compound 1j (0.6mmol), perfluorinated butane base iodine 2a (0.9mmol), β- Alkamine compound 3a (0.3mmol), triethylene diamine (DABCO) (134.5mg, 1.2mmol) and acriflavine (0.2mg, It 0.0009mmol) is stirred in acetonitrile (2.0mL), through N2It replaces 3 times and is placed under 4.5 watts of white light-emitting diodes and shine It penetrates and is stirred to react 28 hours, TLC is detected after completion of the reaction, and concentrated reaction solution is purified by silica gel column chromatography (ethyl acetate/stone Oily ether is mobile phase) obtain sample 4j, yield 48%.Dr (ratio of diastereoisomer) is greater than 20:1.
Embodiment 11
In 5mL reaction flask, by silyl enol ether compound 1k (0.6mmol), perfluorinated butane base iodine 2a (0.9mmol), β- Alkamine compound 3a (0.3mmol), triethylene diamine (DABCO) (134.5mg, 1.2mmol) and acriflavine (0.2mg, It 0.0009mmol) is stirred in acetonitrile (2.0mL), through N2It replaces 3 times and is placed under 4.5 watts of white light-emitting diodes and shine It penetrates and is stirred to react 34 hours, TLC is detected after completion of the reaction, and concentrated reaction solution is purified by silica gel column chromatography (ethyl acetate/stone Oily ether is mobile phase) obtain sample 4k, yield 59%.Dr (ratio of diastereoisomer) is greater than 20:1.
Embodiment 12
In 5mL reaction flask, by silyl enol ether compound 1l (0.6mmol), perfluorinated butane base iodine 2a (0.9mmol), β- Alkamine compound 3a (0.3mmol), triethylene diamine (DABCO) (134.5mg, 1.2mmol) and acriflavine (0.2mg, It 0.0009mmol) is stirred in acetonitrile (2.0mL), through N2It replaces 3 times and is placed under 4.5 watts of white light-emitting diodes and shine It penetrates and is stirred to react 24 hours, TLC is detected after completion of the reaction, and concentrated reaction solution is purified by silica gel column chromatography (ethyl acetate/stone Oily ether is mobile phase) obtain sample 4l, yield 65%.Dr (ratio of diastereoisomer) is greater than 20:1.
Embodiment 13
In 5mL reaction flask, by silyl enol ether compound 1m (0.6mmol), perfluorinated butane base iodine 2a (0.9mmol), β- Alkamine compound 3a (0.3mmol), triethylene diamine (DABCO) (134.5mg, 1.2mmol) and acriflavine (0.2mg, It 0.0009mmol) is stirred in acetonitrile (2.0mL), through N2It replaces 3 times and is placed under 4.5 watts of white light-emitting diodes and shine It penetrates and is stirred to react 34 hours, TLC is detected after completion of the reaction, and concentrated reaction solution is purified by silica gel column chromatography (ethyl acetate/stone Oily ether is mobile phase) obtain sample 4m, yield 56%.Dr (ratio of diastereoisomer) is greater than 20:1.
Embodiment 14
In 5mL reaction flask, by silyl enol ether compound 1o (0.6mmol), perfluorinated butane base iodine 2a (0.9mmol), β- Alkamine compound 3a (0.3mmol), triethylene diamine (DABCO) (134.5mg, 1.2mmol) and acriflavine (0.2mg, It 0.0009mmol) is stirred in acetonitrile (2.0mL), through N2It replaces 3 times and is placed under 4.5 watts of white light-emitting diodes and shine It penetrates and is stirred to react 34 hours, TLC is detected after completion of the reaction, and concentrated reaction solution is purified by silica gel column chromatography (ethyl acetate/stone Oily ether is mobile phase) sample 4o, yield 49% are obtained, dr is greater than 20:1.
Embodiment 15
In 5mL reaction flask, by silyl enol ether compound 1p (0.6mmol), perfluorinated butane base iodine 2a (0.9mmol), β- Alkamine compound 3a (0.3mmol), triethylene diamine (DABCO) (134.5mg, 1.2mmol) and acriflavine (0.2mg, It 0.0009mmol) is stirred in acetonitrile (2.0mL), through N2It replaces 3 times and is placed under 4.5 watts of white light-emitting diodes and shine It penetrates and is stirred to react 48 hours, TLC is detected after completion of the reaction, and concentrated reaction solution is purified by silica gel column chromatography (ethyl acetate/stone Oily ether is mobile phase) obtain sample 4p, yield 34%, dr=1:1.
Embodiment 16
In 5mL reaction flask, by silyl enol ether compound 1a (0.6mmol), perfluorinated butane base iodine 2a (0.9
Mmol), alkamine compound 3b (0.3mmol), triethylene diamine (DABCO) (134.5mg, 1.2mmol) and Acriflavine (0.2mg, 0.0009mmol) is stirred in acetonitrile (2.0mL), through N2Displacement be placed on for 3 times 4.5 watts it is white Irradiation is stirred to react 38 hours under color light emitting diode, and TLC is detected after completion of the reaction, concentrated reaction solution, through silica gel column chromatography It purifies (ethyl acetate/petroleum ether is mobile phase) and obtains sample 4q, yield 59%.Dr is greater than 20:1.
Embodiment 17
In 5mL reaction flask, by silyl enol ether compound 1a (0.6mmol), perfluorinated butane base iodine 2a (0.9
Mmol), alkamine compound 3c (0.3mmol), triethylene diamine (DABCO) (134.5mg, 1.2mmol) and Acriflavine (0.2mg, 0.0009mmol) is stirred in acetonitrile (2.0mL), through N2Displacement be placed on for 3 times 4.5 watts it is white Irradiation is stirred to react 38 hours under color light emitting diode, and TLC is detected after completion of the reaction, concentrated reaction solution, through silica gel column chromatography It purifies (ethyl acetate/petroleum ether is mobile phase) and obtains sample 4r, yield 59%.Dr is greater than 20:1.
Embodiment 18
In 5mL reaction flask, by silyl enol ether compound 1a (0.6mmol), perfluorinated butane base iodine 2a (0.9
Mmol), alkamine compound 3d (0.3mmol), triethylene diamine (DABCO) (134.5mg, 1.2mmol) and Acriflavine (0.2mg, 0.0009mmol) is stirred in acetonitrile (2.0mL), through N2Displacement be placed on for 3 times 4.5 watts it is white Irradiation is stirred to react 24 hours under color light emitting diode, and TLC is detected after completion of the reaction, concentrated reaction solution, through silica gel column chromatography It purifies (ethyl acetate/petroleum ether is mobile phase) and obtains sample 4s, yield 69%.Dr is greater than 20:1.
Embodiment 18
In 5mL reaction flask, by silyl enol ether compound 1a (0.6mmol), perfluoropropane base iodine 2b (0.9mmol), ammonia Base alcoholic compound 3a (0.3mmol), triethylene diamine (DABCO) (134.5mg, 1.2mmol) and acriflavine (0.2mg, It 0.0009mmol) is stirred in acetonitrile (2.0mL), through N2It replaces 3 times and is placed under 4.5 watts of white light-emitting diodes and shine It penetrates and is stirred to react 48 hours, TLC is detected after completion of the reaction, and concentrated reaction solution is purified by silica gel column chromatography (ethyl acetate/stone Oily ether is mobile phase) obtain sample 4t, yield 55%.Dr is greater than 20:1.
Embodiment 18
In 5mL reaction flask, by silyl enol ether compound 1a (0.6mmol), perfluoro-n-hexane base iodine 2c (0.9mmol), Alkamine compound 3a (0.3mmol), triethylene diamine (DABCO) (134.5mg, 1.2mmol) and acriflavine (0.2mg, It 0.0009mmol) is stirred in acetonitrile (2.0mL), through N2It replaces 3 times and is placed under 4.5 watts of white light-emitting diodes and shine It penetrates and is stirred to react 48 hours, TLC is detected after completion of the reaction, and concentrated reaction solution is purified by silica gel column chromatography (ethyl acetate/stone Oily ether is mobile phase) obtain sample 4u, yield 51%.Dr is greater than 20:1.
Embodiment 19
In 5mL reaction flask, by silyl enol ether compound 1l (0.6mmol), perfluoro-n-hexane base iodine 2a (0.9mmol), Alkamine compound 3k (0.3mmol), triethylene diamine (DABCO) (1.5mmol) and acriflavine (0.2mg, It 0.0009mmol) is stirred in acetonitrile (2.0mL), through N2It replaces 3 times and is placed under 4.5 watts of white light-emitting diodes and shine It penetrates and is stirred to react 28 hours, TLC is detected after completion of the reaction, and concentrated reaction solution is purified by silica gel column chromatography (ethyl acetate/stone Oily ether is mobile phase) obtain sample compound 4w, yield 64%.Dr is greater than 20:1.
Embodiment 20
In 5mL reaction flask, by substituted acetophenone compound 1l ' (0.6mmol) and triisopropylsilyl trifluoromethanesulfonic acid After reaction 2h is stirred at room temperature in ester (TIPSOTf, 0.9mmol) and triethylamine (0.9mmol), perfluoro-n-hexane base iodine 2a is added (0.9mmol), alkamine compound 3a (0.3mmol), triethylene diamine (DABCO) (1.5mmol), acriflavine (0.2mg, 0.0009mmol) and acetonitrile (2.0mL), through N2Displacement, which is placed on to irradiate under 4.5 watts of white light-emitting diodes for 3 times, to be stirred to react 35 hours, TLC detect after completion of the reaction, concentrated reaction solution, be purified by silica gel column chromatography (ethyl acetate/petroleum ether for flowing Phase) obtain sample compound 4l, yield 56%.Dr is greater than 20:1.
Embodiment 21
In 5mL reaction flask, by substituted acetophenone compound 1k ' (0.6mmol) and triisopropylsilyl trifluoromethanesulfonic acid After reaction 2h is stirred at room temperature in ester (TIPSOTf, 0.9mmol) and triethylamine (0.9mmol), perfluoro-n-hexane base iodine 2a is added (0.9mmol), alkamine compound 3a (0.3mmol), triethylene diamine (DABCO) (1.5mmol), acriflavine (0.2mg, 0.0009mmol) and acetonitrile (2.0mL), through N2Displacement, which is placed on to irradiate under 4.5 watts of white light-emitting diodes for 3 times, to be stirred to react 35 hours, TLC detect after completion of the reaction, concentrated reaction solution, be purified by silica gel column chromatography (ethyl acetate/petroleum ether for flowing Phase) obtain sample compound 4l, yield 56%.Dr is greater than 20:1.

Claims (10)

1. a kind of preparation method of compound shown in formula 4,
Including, under the conditions of photochemical catalyst, the step of 1 compound of formula, 2 compound of formula and 3 compound of formula reaction 4 compound of acquisition formula Suddenly,
Wherein, R1、R2Selected from hydrogen, alkyl, alkenyl, alkynyl, naphthenic base, heterocycle, aryl and heteroaryl, wherein the alkyl, Alkenyl, alkynyl, naphthenic base, heterocycle, aryl and heteroaryl optionally by selected from alkyl, halogen, hydroxyl, amino, oxygroup, carboxyl, Replaced one or more substituent groups in nitro, cyano, alkoxy, naphthenic base, heterocycle, aryl and heteroaryl, alternatively, R1、R2Carbon atom adjacent thereto is formed together 5 yuan to 10 yuan carbocyclic rings, heterocycle or condensed ring, preferably 6 yuan to 8 yuan carbocyclic rings, heterocycle or thick Ring, the carbocyclic ring, heterocycle or condensed ring are optionally selected from alkyl, halogen, hydroxyl, amino, oxygroup, carboxyl, nitro, cyano, alcoxyl Replaced one or more substituent groups in base, naphthenic base, heterocycle, aryl and heteroaryl;
R3、R4、R5, R6Selected from hydrogen, alkyl, alkenyl, alkynyl, naphthenic base, heterocycle, aryl and heteroaryl, wherein the alkyl, Alkenyl, alkynyl, naphthenic base, heterocycle, aryl and heteroaryl optionally by selected from alkyl, halogen, hydroxyl, amino, oxygroup, carboxyl, Replaced one or more substituent groups in nitro, cyano, alkoxy, naphthenic base, heterocycle, aryl and heteroaryl,
Alternatively,
R5And R6Carbon atom adjacent thereto is formed together 5 yuan to 10 yuan carbocyclic rings, heterocycle or condensed ring, preferably 6 yuan to 8 yuan carbocyclic rings, heterocycles Or condensed ring, the carbocyclic ring, heterocycle or condensed ring optionally by selected from alkyl, halogen, hydroxyl, amino, oxygroup, carboxyl, nitro, cyano, Replaced one or more substituent groups in alkoxy, naphthenic base, heterocycle, aryl and heteroaryl;
Alternatively,
R3And R6Carbon atom adjacent thereto is formed together 5 yuan to 10 yuan carbocyclic rings, heterocycle or condensed ring, preferably 6 yuan to 8 yuan carbocyclic rings, heterocycles Or condensed ring, the carbocyclic ring, heterocycle or condensed ring optionally by selected from alkyl, halogen, hydroxyl, amino, oxygroup, carboxyl, nitro, cyano, Replaced one or more substituent groups in alkoxy, naphthenic base, heterocycle, aryl and heteroaryl;
P is selected from trimethyl silicon substrate, triisopropylsilyl or dimethyl tertiary butyl silicon substrate, preferably triisopropylsilyl;
N is the integer between 2~10.
2. the preferably described light urges the use of agent according to the method described in claim 1, wherein the photochemical catalyst is selected from acriflavine Amount is the 0.1~1% of 1 compound mole of formula.
3. method according to claim 1 or 2, wherein the R1Selected from phenyl, naphthalene and pyridyl group, the phenyl, naphthalene Optionally C is selected from pyridyl group1-6Alkyl, halogen, hydroxyl, amino, carboxyl, nitro, cyano, C1-6Alkoxy, C3-8Naphthenic base, C3-8Replaced one or more substituent groups in heterocycle, aryl and heteroaryl.
4. method according to claim 1-3, wherein 3 compound of formula is selected from:
5. method according to claim 1-4, wherein 4 compound of formula is selected from:
6. method according to claim 1-5, wherein including alkali in the reaction, the alkali is selected from triethylene two Amine, diisopropylamine, preferably triethylene diamine.
7. method according to claim 1-6, wherein the reaction solvent for use is selected from acetonitrile, N, N- dimethyl Formamide, acetone and tetrahydrofuran, preferably acetonitrile.
8. method according to claim 1-7, wherein illumination light source used in the reaction is 4.5 watts of white hairs Optical diode.
9. method according to claim 1-8, wherein the reaction temperature is selected from 10~50 DEG C, preferably 15~30 ℃。
10. a kind of method for preparing drug, fragrance or pesticide, including chemical combination shown in formula described in any one of claim 1-9 4 The preparation method of object.
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Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107365278A (en) * 2017-06-09 2017-11-21 衢州英特高分子材料有限公司 A kind of polysubstituted isoxazole alkane derivatives and preparation method thereof

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107365278A (en) * 2017-06-09 2017-11-21 衢州英特高分子材料有限公司 A kind of polysubstituted isoxazole alkane derivatives and preparation method thereof

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
JOHNATHAN V. MATLOCK 等: "Synthesis of 6- and 7‑Membered N‑Heterocycles Using α‑Phenylvinylsulfonium Salts", 《ORG. LETT.》 *
KEVIN R. CAMPOS: "Direct sp3 C–H bond activation adjacent to nitrogen in heterocycles", 《CHEM. SOC. REV.》 *

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