WO1998003501A1 - Procede de preparation de composes de benzothiophene 2,6-disubstitue - Google Patents
Procede de preparation de composes de benzothiophene 2,6-disubstitue Download PDFInfo
- Publication number
- WO1998003501A1 WO1998003501A1 PCT/JP1997/002440 JP9702440W WO9803501A1 WO 1998003501 A1 WO1998003501 A1 WO 1998003501A1 JP 9702440 W JP9702440 W JP 9702440W WO 9803501 A1 WO9803501 A1 WO 9803501A1
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- WO
- WIPO (PCT)
- Prior art keywords
- group
- formula
- compound
- lower alkyl
- reaction
- Prior art date
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Classifications
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C323/00—Thiols, sulfides, hydropolysulfides or polysulfides substituted by halogen, oxygen or nitrogen atoms, or by sulfur atoms not being part of thio groups
- C07C323/22—Thiols, sulfides, hydropolysulfides or polysulfides substituted by halogen, oxygen or nitrogen atoms, or by sulfur atoms not being part of thio groups containing thio groups and doubly-bound oxygen atoms bound to the same carbon skeleton
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07D—HETEROCYCLIC COMPOUNDS
- C07D333/00—Heterocyclic compounds containing five-membered rings having one sulfur atom as the only ring hetero atom
- C07D333/50—Heterocyclic compounds containing five-membered rings having one sulfur atom as the only ring hetero atom condensed with carbocyclic rings or ring systems
- C07D333/52—Benzo[b]thiophenes; Hydrogenated benzo[b]thiophenes
- C07D333/54—Benzo[b]thiophenes; Hydrogenated benzo[b]thiophenes with only hydrogen atoms, hydrocarbon or substituted hydrocarbon radicals, directly attached to carbon atoms of the hetero ring
Definitions
- the present invention relates to a benzothiophene compound which is a useful intermediate for synthesizing a certain 2-substituted 1-3- (4-monosubstituted benzoyl) -16-hydroxybenzo [b] thiophene derivative having an antiestrogenic action. And an intermediate compound useful in the method.
- R represents a hydrogen atom, a hydroquinine group, a lower alkoxy group, an acyloxy group, or an N, N-di-lower alkyl-substituted or unsubstituted carbamoyloxy group;
- R 2 represents a halogen atom; a lower alkyl group; or a cycloalkyl group or a cycloalkenyl group optionally substituted with a lower alkyl group, a hydroxy group, an acyloxy group or an oxo group;
- R 3 and R 4 each represent a hydrogen atom or a lower alkyl group, Or a heterocyclic group which may further contain a heteroatom selected from 0, S and N together with the nitrogen atom to which they are bonded,
- A represents 0 or CH 2 ;
- n 1 or 2
- a group of compounds are disclosed.
- R 1 represents a lower alkoxy group
- R 2 represents a halogen atom; a lower alkyl group; or a cycloalkyl group optionally substituted with a lower alkyl group, a hydroxy group, an acyloxy group or an oxo group.
- a cycloalkenyl group
- benzothiophene compound represented by the formula (I) is an important synthetic intermediate of the compound represented by the formula (A).
- the compound represented by the formula (I) Synthesized according to the following reaction formula using alkoxybenzo [b] thiophene (compound of the following formula (B)) as a starting material.
- R a and R b each represent a lower alkyl group, or may be substituted with a lower alkyl group or an oxo group together with the carbon atom to which they are bonded.
- the yield of the ring closure reaction in the above reaction formula 2 is about 60%, and the regioselectivity is about 10: 1.
- the reaction of introducing a substituent at the 2-position of benzothiophene reaction of the above-mentioned reaction formula 1
- non-industrial butyllithium is used as a reaction reagent, and the subsequent hydrogenation reaction is never carried out. It is not an industrially advantageous reaction.
- the present inventors have conducted various studies on a method for producing the benzothiophene compound of the formula (I). As a result, the present inventors have found that 3-alkoxythiophenol is used as a starting material in only two steps and industrially. It has been found that a benzothiophene compound of the formula (I) can be produced using advantageous reaction reagents and reaction conditions, and that the production method is excellent in yield and regioselectivity. Disclosure of the invention
- R 1 and R 2 have the above-mentioned meaning
- R 1 and R 2 have the above-mentioned meaning
- R 1 has the meaning described above
- R 2 has the meaning described above
- the term “lower” means that the group or compound to which this term is attached has at most 6, preferably at most 4, carbon atoms.
- the “lower alkyl group” may be linear or branched, for example, methyl, ethyl, n-propyl, isopropyl, n-butyl, isobutyl, sec-butyl, tert-butyl, sec-pentyl, 1-ethylpropyl and the like.
- the "quin group” is a lower alkyloxy group having an alkyl moiety having the above-mentioned meaning, and examples thereof include methoxy, ethoxy, n-propoxy, isopropoxy, and n-butoxy groups.
- the "cycloalkyl group” may have 3 to 12 carbon atoms, preferably 3 to 8 carbon atoms.
- the “cycloalkenyl group” may have 4 to 12 carbon atoms, preferably 5 to 8 carbon atoms.
- the “halogen atom” includes a fluorine, chlorine or bromine atom.
- Ashiruokishi group specifically the formula R 5 C 0 - 0 - Ri Oh a group represented by wherein, R 5 is a hydrogen atom; optionally halogen atom, an amino group, a force carbonyl group, a lower alkoxy
- R 5 is a hydrogen atom; optionally halogen atom, an amino group, a force carbonyl group, a lower alkoxy
- a lower alkyl group optionally substituted with a carbonyl group, a lower alkanoylquine group, a carbamoyl group or an aryl group; a lower alkenyl group optionally substituted with an aryl group; a lower cycloalkyl group; It means a lower alkyl group, a lower alkoxy group or an aryl group which may be substituted with a halogen atom.
- examples of the "asyloxy group” include: acetoxy, propionyloxy, trifluoroacetyloxy, glycyloxy, 3-carboxypropionyloxy, 3-ethoxycarbonylpropionyloxy, acetoxyacetoxy, phenylacetoxy And acryloyloxy, cyclohexanecarbonyloxy, benzoyloxy, 4-methoxybenzoyloxy, 2-chlorobenzoyloxy and the like.
- R 2 represents “optionally a lower alkyl group, a hydroxy group, A cycloalkyl group or a cycloalkenyl group which may be substituted with an xy group or an oxo group
- the cycloalkyl group or the cycloalkenyl group is unsubstituted or a lower alkyl group or a hydroxy group.
- Roxycyclopentyl 2-methylcyclohexyl, 3-methylcyclohexyl, 4-methynolecyclohexynole ', 4-hydroxycyclohexyl, 4-acetoxinclohexyl, 4-benzoyloxycyclohexyl, 4-oxocyclohexyl, 2-methylcycloheptyl, etc. That.
- preferred compounds of the formulas (I) and (II) are those wherein R 2 is a branched lower alkyl group or optionally a lower alkyl group or a hydroxy group.
- a compound represented by an optionally substituted cycloalkyl group having 3 to 8 carbon atoms, among which the compounds of the above formulas (I) and (II) wherein R 2 represents a cyclohexyl group; Are preferred.
- the compound of the formula (I) is produced by subjecting the compound of the formula (II) to a ring closure reaction.
- the ring-closure reaction is usually carried out by halogenated hydrocarbons such as methylene chloride and chloroform; aromatic hydrocarbons such as benzene, toluene, xylene and cyclobenzene; alkanes such as petroleum ether and hexane; nitrobenzene; Acids, for example, aluminum chloride, aluminum bromide, zinc chloride, boron trifluoride in an inert organic solvent such as dihydrocarbons such as nitromethane
- the reaction can be carried out in the presence of a Lewis acid such as sulfur, titanium tetrachloride, stannic chloride or the like, or a strong acid such as sulfuric acid or p-toluenesulfonic acid.
- the reaction temperature is generally from ice-cooling to the reflux temperature of the reaction mixture, preferably from ice-cooling to about 100 ° C.
- the amount of the acid used relative to the compound of the formula (II) is a catalyst amount. Specifically, 0.1 to 10 mol of the acid is usually used per mol of the compound of the formula (II). It is advantageous to use it in an amount of about 0.5 to 5 mol, preferably about 0.5 to 5 mol. Thus, the benzothiophene compound of the formula (I) is produced in high yield.
- a 2,4-disubstituted benzothiophene compound is also produced as a by-product, but this reaction has a very high regioselectivity.
- the ratio of the main product to the by-product is about 3 A very high position selectivity of 0: 1 is obtained.
- the benzothiophene compound of the formula (I) thus obtained can be separated and purified from the reaction mixture by a conventional method, for example, extraction, filtration, distillation, recrystallization, column chromatography, thin layer chromatography, etc. can do.
- the compound of the formula (II) used as a starting material in the above reaction is a novel compound which has not been described in a conventional literature, and is an important intermediate when performing the method of the present invention.
- the compound of the formula (II) used as a starting material in the method of the present invention is, for example, a compound of the formula (III) and a compound of the formula (IV) Can be produced by reacting
- the reaction is usually carried out with ketones such as acetone and methylethyl ketone; ethers such as tetrahydrofuran and dioxane; nitriles such as acetonitrile; halogenation such as methylene chloride and chloroform.
- Hydrocarbons In an inert solvent such as aromatic hydrocarbons such as benzene and toluene, a base, for example, an inorganic base such as potassium carbonate, sodium carbonate, sodium hydroxide, potassium hydroxide or the like; The reaction can be carried out in the presence of an organic base such as lyethylamine, diisopropylethylamine, pyridine and the like.
- reaction temperature is generally from ice-cooled to about 10 ° C., preferably from ice-cooled to about room temperature.
- the compound of the formula (IV) in a proportion of at least 1 mol, preferably about 1.05 to 1.5 mol, per 1 mol of the compound of the formula (III).
- the base is generally used in a proportion of at least 1 mole, preferably about 1.05 to 2 moles, per mole of the compound of the formula (III).
- the amount of the reducing agent to be used is not particularly limited, but it is generally advantageous to use the reducing agent in a ratio of about 0.1 to 0.5 mol per 1 mol of the compound of the formula (III).
- the compound of the formula (II) is obtained in high yield.
- the benzothiophene compound of the formula (I) produced by the method of the present invention described above can be produced, for example, according to the method described in WO 93/101 13 pan fret according to the formula:
- R 3 , RA, B and n have the above-mentioned meaning, and X is a halogen atom.
- the compound of formula (A) which has an antiestrogenic effect and is therefore effective for treating estrogen-dependent diseases such as endometriosis, uterine adenomyosis, endometrial cancer, breast cancer, osteoporosis, etc. I can guide you.
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- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Heterocyclic Carbon Compounds Containing A Hetero Ring Having Oxygen Or Sulfur (AREA)
- Pharmaceuticals Containing Other Organic And Inorganic Compounds (AREA)
Description
Claims
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US09/230,279 US6020531A (en) | 1996-07-24 | 1997-07-15 | Process for the preparation of 2,6-disubstituted benzothiophene compounds |
CA002261317A CA2261317A1 (en) | 1996-07-24 | 1997-07-15 | Process for the preparation of 2,6-disubstituted benzothiophene compounds |
AU34603/97A AU717844B2 (en) | 1996-07-24 | 1997-07-15 | Process for the preparation of 2,6-disubstituted benzothiophene compounds |
EP97930789A EP0919552A4 (en) | 1996-07-24 | 1997-07-15 | METHOD FOR PRODUCING 2,6-DISUBSTITUTED BENZOTHIOPHENE COMPOUNDS |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP8/212200 | 1996-07-24 | ||
JP21220096 | 1996-07-24 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO1998003501A1 true WO1998003501A1 (fr) | 1998-01-29 |
Family
ID=16618585
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP1997/002440 WO1998003501A1 (fr) | 1996-07-24 | 1997-07-15 | Procede de preparation de composes de benzothiophene 2,6-disubstitue |
Country Status (6)
Country | Link |
---|---|
US (1) | US6020531A (ja) |
EP (1) | EP0919552A4 (ja) |
KR (1) | KR20000067867A (ja) |
AU (1) | AU717844B2 (ja) |
CA (1) | CA2261317A1 (ja) |
WO (1) | WO1998003501A1 (ja) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2000035905A1 (en) * | 1998-12-16 | 2000-06-22 | Northwestern University | INHIBITORS OF β-LACTAMASES AND USES THEREFOR |
DE19913349A1 (de) * | 1999-03-24 | 2000-09-28 | Clariant Gmbh | Benzothiophene und ihre Verwendung in flüssigkristallinen Mischungen |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH05140148A (ja) * | 1991-11-15 | 1993-06-08 | Teikoku Hormone Mfg Co Ltd | 新規なベンゾチオフエン誘導体 |
Family Cites Families (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2949471A (en) * | 1956-07-03 | 1960-08-16 | American Cyanamid Co | Preparation of substituted thionaphthenes |
US5169961A (en) * | 1991-11-22 | 1992-12-08 | Abbott Laboratories | Process for the production of 2-acetylbenzo [β]thiophenes |
DE4204969A1 (de) * | 1992-02-19 | 1993-08-26 | Basf Ag | Verfahren zur herstellung von benzo(b)thiophenen |
US5298630A (en) * | 1992-06-03 | 1994-03-29 | Sumitomo Seika Chemicals Co., Ltd. | Processes for producing 2-substituted benzo[B]thiophene |
JP3337728B2 (ja) * | 1992-11-20 | 2002-10-21 | イハラケミカル工業株式会社 | 2‐アセチルベンゾ[b]チオフェンの製造方法 |
WO1994027985A1 (en) * | 1993-05-28 | 1994-12-08 | Smithkline Beecham Corporation | Process for the preparation of substituted 3-halomethyl-benzothiophenes, benzofurans and -indoles and intermediates thereof |
US5614639A (en) * | 1995-03-31 | 1997-03-25 | Eli Lilly And Company | Process for preparing 2-substituted benzo[b]thiophene compounds and intermediates thereof |
US5606075A (en) * | 1995-06-07 | 1997-02-25 | Eli Lilly And Company | Process for the synthesis of benzo[b]thiophenes |
US5908859A (en) * | 1997-08-11 | 1999-06-01 | Eli Lilly And Company | Benzothiophenes for inhibiting hyperlipidemia |
-
1997
- 1997-07-15 KR KR1019997000238A patent/KR20000067867A/ko not_active Application Discontinuation
- 1997-07-15 WO PCT/JP1997/002440 patent/WO1998003501A1/ja not_active Application Discontinuation
- 1997-07-15 CA CA002261317A patent/CA2261317A1/en not_active Abandoned
- 1997-07-15 AU AU34603/97A patent/AU717844B2/en not_active Ceased
- 1997-07-15 EP EP97930789A patent/EP0919552A4/en not_active Withdrawn
- 1997-07-15 US US09/230,279 patent/US6020531A/en not_active Expired - Fee Related
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH05140148A (ja) * | 1991-11-15 | 1993-06-08 | Teikoku Hormone Mfg Co Ltd | 新規なベンゾチオフエン誘導体 |
Non-Patent Citations (3)
Title |
---|
CHUM. THER., Vol. 8, No. 5, (1973), DESCAMPS M. et al., "Recherches Dans la Serie des Benzo(b)Thiophenes. II. Acides Benzo(b)Thienyl-2 ou -3 Acetiques, Agents Anti-Inflammatoires Potentiels", p. 536-544. * |
See also references of EP0919552A4 * |
SYNTHESIS, No. 4, (1985), DE GROOT, AEDE, "A Novel Synthesis of 1-Benzothiophenes from 2-(Phynylthio)-Aldehydes", p. 434-436. * |
Also Published As
Publication number | Publication date |
---|---|
CA2261317A1 (en) | 1998-01-29 |
EP0919552A1 (en) | 1999-06-02 |
AU3460397A (en) | 1998-02-10 |
AU717844B2 (en) | 2000-04-06 |
US6020531A (en) | 2000-02-01 |
EP0919552A4 (en) | 1999-09-15 |
KR20000067867A (ko) | 2000-11-25 |
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