WO1995004044A1 - Procede de production de derives d'hydroquinone et de benzoquinone - Google Patents
Procede de production de derives d'hydroquinone et de benzoquinone Download PDFInfo
- Publication number
- WO1995004044A1 WO1995004044A1 PCT/JP1994/001230 JP9401230W WO9504044A1 WO 1995004044 A1 WO1995004044 A1 WO 1995004044A1 JP 9401230 W JP9401230 W JP 9401230W WO 9504044 A1 WO9504044 A1 WO 9504044A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- hydrogen atom
- group
- general formula
- lower alkyl
- derivative
- Prior art date
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07D—HETEROCYCLIC COMPOUNDS
- C07D213/00—Heterocyclic compounds containing six-membered rings, not condensed with other rings, with one nitrogen atom as the only ring hetero atom and three or more double bonds between ring members or between ring members and non-ring members
- C07D213/02—Heterocyclic compounds containing six-membered rings, not condensed with other rings, with one nitrogen atom as the only ring hetero atom and three or more double bonds between ring members or between ring members and non-ring members having three double bonds between ring members or between ring members and non-ring members
- C07D213/04—Heterocyclic compounds containing six-membered rings, not condensed with other rings, with one nitrogen atom as the only ring hetero atom and three or more double bonds between ring members or between ring members and non-ring members having three double bonds between ring members or between ring members and non-ring members having no bond between the ring nitrogen atom and a non-ring member or having only hydrogen or carbon atoms directly attached to the ring nitrogen atom
- C07D213/24—Heterocyclic compounds containing six-membered rings, not condensed with other rings, with one nitrogen atom as the only ring hetero atom and three or more double bonds between ring members or between ring members and non-ring members having three double bonds between ring members or between ring members and non-ring members having no bond between the ring nitrogen atom and a non-ring member or having only hydrogen or carbon atoms directly attached to the ring nitrogen atom with substituted hydrocarbon radicals attached to ring carbon atoms
- C07D213/28—Radicals substituted by singly-bound oxygen or sulphur atoms
- C07D213/30—Oxygen atoms
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07D—HETEROCYCLIC COMPOUNDS
- C07D417/00—Heterocyclic compounds containing two or more hetero rings, at least one ring having nitrogen and sulfur atoms as the only ring hetero atoms, not provided for by group C07D415/00
- C07D417/02—Heterocyclic compounds containing two or more hetero rings, at least one ring having nitrogen and sulfur atoms as the only ring hetero atoms, not provided for by group C07D415/00 containing two hetero rings
- C07D417/06—Heterocyclic compounds containing two or more hetero rings, at least one ring having nitrogen and sulfur atoms as the only ring hetero atoms, not provided for by group C07D415/00 containing two hetero rings linked by a carbon chain containing only aliphatic carbon atoms
Definitions
- the present invention relates to a method for producing an important synthetic intermediate of a benzothiabul derivative which is useful for the prevention and treatment of diseases in which leukotriene and thromboxane production inhibitory effects are effective as disclosed in EP-A 507 318. .
- a method for producing compound (VI) similar to pyridinylmethyl-1,4-benzoquinone derivative represented by general formula (IV) is shown in EP-A 507 318.
- the dimethoxy is used as a starting material.
- This is a method in which a pyridylmethanol group is introduced using a benzene derivative, and oxidized by means of ammonium nitrate.
- the 2,5-dimethoxybenzene derivative used as a starting material in the conventional production method is a reagent (n-BuLi) used for the introduction of a pyridylmethanol group in the next reaction. It is necessary to protect the hydroxyl group from the characteristics, and for that purpose, it is obtained by methylating a hydroquinone derivative (R 5 and R 6 mean the same as described above) as shown in the following reaction formula. Considering that after the introduction of the pyridylmethanol group, the methyl group (protective group) is oxidized and demethylated in the oxidation step performed to produce the desired 1,4-benzoquinone, this methylation is completely useless. This is an industrially disadvantageous process.
- the methoxy form (protected hydroxyl group) is more resistant to the reaction than the hydroxy form, so the oxidation conditions are restricted. ) Is disadvantageous. Therefore, it has been desired to establish an industrial process for introducing a pyridylmethanol group without protecting the hydroxyl group of the hydroquinone derivative, and to establish conditions for subsequent inexpensive oxidation.
- the present inventors have intensively studied a production method for introducing a pyridylmethyl group without protecting the hydroxyl group of the hydroquinone derivative represented by the general formula (I).
- the hydroquinone derivative represented by the general formula (I) can be converted into the pyridylaldehyde represented by the general formula ( ⁇ ) or the alkylacetal derivative represented by the general formula ( ⁇ ⁇ ) without protecting the hydroxyl group.
- a process for producing a pyridylmethylhydroquinone derivative represented by the general formula ( ⁇ I) was found.
- a process for producing pyridylmethyl-1,4-benzoquinone derivative (IV) under inexpensive oxidation conditions was established, and the present invention was completed.
- R 1 is a hydrogen atom, a methyl group or a methoxy group
- R 2 and R 3 are the same or different and are a hydrogen atom or a methyl group, is a hydrogen atom or a lower alkyl group
- R ' is a lower alkyl group
- X represents a hydrogen atom, a lower alkyl group, a lower alkoxy group or a halogen atom
- This step is a step of condensing a hydroquinone derivative (I) and a pyridylaldehyde derivative (II) or an acetoyl derivative (I ⁇ ) in the presence of an acid to obtain a pyridylmethyl derivative (I11).
- the acid include hydrochloric acid, sulfuric acid, phosphoric acid, trifluoroacetic acid, and methanesulfonic acid.
- the reaction solvent include water, methanol, ethanol, propanol, isopropanol, methylene chloride, 1,2-dichloromethane, benzene, and toluene.
- the reaction temperature ranges from 110 ° C to 100 ° C, preferably from room temperature to 100 ° C, more preferably from 10 ° C to 30 ° C.
- the hydroquinone derivative (I) is directly added to the reaction solution without isolating the produced acetate.
- the hydroquinone derivative of the raw material compound (I) can be obtained by the method described in J. Am. Chem. Chemical Society (J. Am. Chem. Soc.), Vol. 66, pp. 1330, 1944, or Bulletin 'Ob' The 'Chemical Society' Obb Japan (Bu 11 1. Chem. Soc. Jpn.) 1 992, obtained by the method described in Vol. 65, p. 522 1 , 4 Benzoquinone derivatives can be prepared in a manner known per se by using a mild reducing agent such as sodium hydrosulfite, sodium acid sulfite, and sodium borohydride, or platinum oxide. It is easily obtained by reduction in the presence of radium-carbon.
- a mild reducing agent such as sodium hydrosulfite, sodium acid sulfite, and sodium borohydride, or platinum oxide. It is easily obtained by reduction in the presence of radium-carbon.
- R 1 is a hydrogen atom, a methyl group or a methoxy group
- R 2 and R 3 are the same or different and are a hydrogen atom or a methyl group
- R 4 is a hydrogen atom or a lower alkyl group
- X is a hydrogen atom , Lower alkyl group, lower alkoxy group or halogen atom
- This step is an oxidation step of the hydroquinone derivative (III) to the 1,4-benzoquinone derivative (IV).
- Oxidants can be used from mild oxidants, such as air, oxygen, Fremy's salt, ferric chloride, ferric sulfate, hydrogen peroxide, peracid, silver oxide, and nitric acid. Cerium ammonium, nitric acid, and the like.
- These reactions are usually carried out in the presence of a solvent such as methanol, acetonitrile, tetrahydrofuran, dioxane, ethyl acetate, 1,2-dimethoxetane, acetic acid, or a water-containing solvent comprising these organic solvents and water. Water.
- the reaction temperature ranges from 110 ° C to 100 ° C, preferably from 110 ° C to 30 ° C, and the reaction time is from 1 minute to 3 days. Preferably it is usually within 2 hours.
- the lower alkyl group in the definition of R 4 and X is a linear or branched alkyl group having 1 to 4 carbon atoms, for example, a methyl-blocked, ethyl group, n —Propyl, isopropyl, n-butyl, isobutyl, s-butyl, etc.
- preferred groups are methyl group, ethyl group, Examples thereof include an n-propyl group and an isopropyl group.
- lower alkoxy includes methoxy, ethoxyquin, n-propoxy, isopropoxy, and n-butoxy
- halogen includes fluorine, chlorine, and bromine. it can.
- the present invention is a very advantageous method in industrial production. That is, it is possible to directly introduce a pyridylmethyl group without having to protect the hydroxyl group of the hydroquinone derivative with a protecting group such as a methyl group. As a result, oxidation to benzoquinone becomes possible under mild conditions, and inexpensive oxidation conditions can be selected.
- Hydrochloric acid gas was introduced into a solution of 1.0 ml (10.6 mmol) of 3-pyridinecarboxaldehyde in methanol (15 ml) under ice-cooling for 50 minutes. Then, 1.6 g (l. 6 mm 01) of 2,6-dimethyl_p-hydroquinone was added, and the mixture was stirred for 1 hour under ice-cooling. The methanol was distilled off under reduced pressure. , And the mixture was neutralized with sodium bicarbonate, and the organic layer was separated and dried over magnesium sulfate.
- Example 2 The same procedure as in Example 1 was repeated, except that 6-methyl-2-pyridinecarboxyaldehyde was used in place of 3-pyridinecarboxaldehyde, to give the title compound in a yield of 88%.
- Example 2 The same procedure as in Example 1 was repeated, except that 6-chloro-2-pyridinecarboxyaldehyde was used in place of 3-pyridinecarboxaldehyde, to give the title compound in a yield of 89%.
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Pyridine Compounds (AREA)
- Plural Heterocyclic Compounds (AREA)
- Pharmaceuticals Containing Other Organic And Inorganic Compounds (AREA)
Description
Claims
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP94921818A EP0704435B1 (en) | 1993-07-30 | 1994-07-26 | Process for producing hydroquinone and benzoquinone derivative |
DE69411273T DE69411273T2 (de) | 1993-07-30 | 1994-07-26 | Verfahren zur herstellung von hydrochinon-und benzochinon-derivaten |
US08/578,695 US5637716A (en) | 1993-07-30 | 1994-07-26 | Processes for the preparation of hydroquinone and benzoquinone derivatives |
Applications Claiming Priority (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP20680993 | 1993-07-30 | ||
JP5/206809 | 1993-07-30 | ||
JP23719393 | 1993-08-31 | ||
JP5/237193 | 1993-08-31 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO1995004044A1 true WO1995004044A1 (fr) | 1995-02-09 |
Family
ID=26515889
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP1994/001230 WO1995004044A1 (fr) | 1993-07-30 | 1994-07-26 | Procede de production de derives d'hydroquinone et de benzoquinone |
Country Status (3)
Country | Link |
---|---|
EP (1) | EP0704435B1 (ja) |
DE (1) | DE69411273T2 (ja) |
WO (1) | WO1995004044A1 (ja) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
AR029289A1 (es) | 2000-07-05 | 2003-06-18 | Ishihara Sangyo Kaisha | Derivado de benzoilpiridina o su sal, fungicida que lo contiene como un ingrediente activo, su proceso de produccion e intermediario para producirlo |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0507318A1 (en) * | 1991-04-04 | 1992-10-07 | Eisai Co., Ltd. | Benzothiazole derivative |
JPH05148183A (ja) * | 1991-11-07 | 1993-06-15 | Eisai Co Ltd | キノン誘導体の製造方法 |
-
1994
- 1994-07-26 EP EP94921818A patent/EP0704435B1/en not_active Expired - Lifetime
- 1994-07-26 WO PCT/JP1994/001230 patent/WO1995004044A1/ja active IP Right Grant
- 1994-07-26 DE DE69411273T patent/DE69411273T2/de not_active Expired - Fee Related
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0507318A1 (en) * | 1991-04-04 | 1992-10-07 | Eisai Co., Ltd. | Benzothiazole derivative |
JPH05148183A (ja) * | 1991-11-07 | 1993-06-15 | Eisai Co Ltd | キノン誘導体の製造方法 |
Non-Patent Citations (1)
Title |
---|
See also references of EP0704435A4 * |
Also Published As
Publication number | Publication date |
---|---|
DE69411273D1 (de) | 1998-07-30 |
DE69411273T2 (de) | 1998-12-03 |
EP0704435A1 (en) | 1996-04-03 |
EP0704435B1 (en) | 1998-06-24 |
EP0704435A4 (en) | 1996-02-19 |
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