GB593024A - Production of ª‰-2-thienoylpropionic acids and derivatives thereof - Google Patents

Production of ª‰-2-thienoylpropionic acids and derivatives thereof

Info

Publication number
GB593024A
GB593024A GB951644A GB951644A GB593024A GB 593024 A GB593024 A GB 593024A GB 951644 A GB951644 A GB 951644A GB 951644 A GB951644 A GB 951644A GB 593024 A GB593024 A GB 593024A
Authority
GB
United Kingdom
Prior art keywords
bromo
acids
acid
alkyl
methyl
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
GB951644A
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Kodak Ltd
Original Assignee
Kodak Ltd
Filing date
Publication date
Application filed by Kodak Ltd filed Critical Kodak Ltd
Priority to FR950290D priority Critical patent/FR950290A/en
Publication of GB593024A publication Critical patent/GB593024A/en
Expired legal-status Critical Current

Links

Classifications

    • CCHEMISTRY; METALLURGY
    • C07ORGANIC CHEMISTRY
    • C07DHETEROCYCLIC COMPOUNDS
    • C07D417/00Heterocyclic 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
    • C07D417/02Heterocyclic 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
    • C07D417/04Heterocyclic 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 directly linked by a ring-member-to-ring-member bond
    • CCHEMISTRY; METALLURGY
    • C07ORGANIC CHEMISTRY
    • C07DHETEROCYCLIC COMPOUNDS
    • C07D277/00Heterocyclic compounds containing 1,3-thiazole or hydrogenated 1,3-thiazole rings
    • C07D277/02Heterocyclic compounds containing 1,3-thiazole or hydrogenated 1,3-thiazole rings not condensed with other rings
    • C07D277/20Heterocyclic compounds containing 1,3-thiazole or hydrogenated 1,3-thiazole rings not condensed with other rings having two or three double bonds between ring members or between ring members and non-ring members
    • C07D277/22Heterocyclic compounds containing 1,3-thiazole or hydrogenated 1,3-thiazole rings not condensed with other rings having two or three double bonds between ring members or between ring members and non-ring members with only hydrogen atoms, hydrocarbon or substituted hydrocarbon radicals, directly attached to ring carbon atoms
    • C07D277/30Radicals substituted by carbon atoms having three bonds to hetero atoms with at the most one bond to halogen, e.g. ester or nitrile radicals
    • CCHEMISTRY; METALLURGY
    • C07ORGANIC CHEMISTRY
    • C07DHETEROCYCLIC COMPOUNDS
    • C07D277/00Heterocyclic compounds containing 1,3-thiazole or hydrogenated 1,3-thiazole rings
    • C07D277/02Heterocyclic compounds containing 1,3-thiazole or hydrogenated 1,3-thiazole rings not condensed with other rings
    • C07D277/20Heterocyclic compounds containing 1,3-thiazole or hydrogenated 1,3-thiazole rings not condensed with other rings having two or three double bonds between ring members or between ring members and non-ring members
    • C07D277/32Heterocyclic compounds containing 1,3-thiazole or hydrogenated 1,3-thiazole rings not condensed with other rings having two or three double bonds between ring members or between ring members and non-ring members with hetero atoms or with carbon atoms having three bonds to hetero atoms with at the most one bond to halogen, e.g. ester or nitrile radicals, directly attached to ring carbon atoms
    • C07D277/36Sulfur atoms
    • CCHEMISTRY; METALLURGY
    • C07ORGANIC CHEMISTRY
    • C07DHETEROCYCLIC COMPOUNDS
    • C07D277/00Heterocyclic compounds containing 1,3-thiazole or hydrogenated 1,3-thiazole rings
    • C07D277/02Heterocyclic compounds containing 1,3-thiazole or hydrogenated 1,3-thiazole rings not condensed with other rings
    • C07D277/20Heterocyclic compounds containing 1,3-thiazole or hydrogenated 1,3-thiazole rings not condensed with other rings having two or three double bonds between ring members or between ring members and non-ring members
    • C07D277/32Heterocyclic compounds containing 1,3-thiazole or hydrogenated 1,3-thiazole rings not condensed with other rings having two or three double bonds between ring members or between ring members and non-ring members with hetero atoms or with carbon atoms having three bonds to hetero atoms with at the most one bond to halogen, e.g. ester or nitrile radicals, directly attached to ring carbon atoms
    • C07D277/38Nitrogen atoms
    • C07D277/40Unsubstituted amino or imino radicals
    • CCHEMISTRY; METALLURGY
    • C07ORGANIC CHEMISTRY
    • C07DHETEROCYCLIC COMPOUNDS
    • C07D293/00Heterocyclic compounds containing rings having nitrogen and selenium or nitrogen and tellurium, with or without oxygen or sulfur atoms, as the ring hetero atoms
    • C07D293/02Heterocyclic compounds containing rings having nitrogen and selenium or nitrogen and tellurium, with or without oxygen or sulfur atoms, as the ring hetero atoms not condensed with other rings
    • C07D293/04Five-membered rings
    • C07D293/06Selenazoles; Hydrogenated selenazoles

Abstract

4-Arylthiazole- and -selenazole-5-acetic acids and esters and 4-(21-thienyl)-thiazole-5-acetic acids and esters, of the general formula <FORM:0593024/IV/1> where R1 is an aryl group (which may contain nuclear substituents, e.g. a phenyl, tolyl, naphthyl, ethylphenyl isopropylphenyl, xylyl, anisyl, phenetyl or chlorophenyl group) or a 2-thienyl group, R2 is hydrogen or an alkyl or aryl group, R3 is hydrogen or a hydrocarbon radical, R' is hydrogen or an alkyl, alkylthio, aralkylthio or amino group, and X is sulphur or (when R1 is aryl and R' is amino) selenium, are manufactured by condensing b -halogen-b -aryl- or -b -2-thenyl-propionic acids or esters or a -alkyl- or a -aryl derivatives thereof with thiourea, thioamides of aliphatic monocarboxylic acids, or S-alkyl or S-aralkyl dithiocarbamates, or condensing b -halogen-b -arylpropionic acids or esters or a -alkyl or a -aryl derivative thereof with selenourea. The reaction may be effected by bringing the reactants together in a solvent, with heating if necessary and preferably in the presence of alkalis, e.g. alkali carbonates or bicarbonates. In examples: (1) b -bromo-b -benzoylpropionic acid is shaken with an ethereal solution of thioformamide (prepared by the action of phosphorus pentasulphide on formamide in ether) to produce 4-phenylthiazole-5-acetic acid; (2) 4-phenyl-, 4 - (41 - methyl-, -ethyl-, -isopropyl-, -methoxy-and -chloro-phenyl)- and 4-(21 : 41 - dimethylphenyl) - 2 - methylthiazole - 5 - acetic acids are prepared by the action of thioacetamide on the appropriate b -bromo-b -aroylpropionic acids in isopropyl alcohol with the addition of sodium carbonate; (3) b -bromo-b -thienoyl propionic acid and thioacetamide are dissolved in isopropyl alcohol and allowed to stand, and the resulting hydrobromide is treated with aqueous sodium hydroxide to liberate 4-(21-thienyl)-2-methylthiazole-5-acetic acid; (4) and (5) b -bromo-b -(1- and 2-naphthoyl)-propionic acids are treated as in (2) to give 4-(11-and 21 - naphthyl) - 2 - methylthiazole - 5 - acetic acids; (6) b -bromo-b -benzoylisobutyric acid is treated with thioacetamide in ethanol in the presence of sodium carbonate to yield a - 5 - (4 - phenyl - 2 - methylthiazole) - propionic acid; (7) methyl b -bromo-b -benzoylpropionate is refluxed with thioacetamide in ethyl alcohol with the addition of sodium carbonate to form methyl 4-phenyl-2-methylthiazole-5-acetate, which may be converted to the free acid by heating with aqueous alcoholic potassium hydroxide; (8) 4-phenyl- and 4 - (41 - methylphenyl) - 2 - aminothiazole - 5 - acetic acids are prepared by heating the appropriate b - bromo - b - aroylpropionic acids with thiourea in isopropyl alcohol with the addition of sodium carbonate; (9) b -bromo-b -thienoylpropionic acid similarly yields 2-amino-4-(21-thienyl)-thiazole-5-acetic acid; (10) and (11) b - bromo - b - (1- and 2-naphthoyl)-propionic acids similarly give 2-amino-4-(11- and 21-naphthyl) - thiazole - 5 - acetic acids; (12) the thioacetamide in (6) is replaced by thiourea, producing a - 5 - (2 - amino - 4 - phenylthiazole)-propionic acid; (13) methyl b -bromo-b -benzoylpropionate is heated with thiourea in isopropyl alcohol in the presence of sodium carbonate to produce methyl-2-amino-4-phenylthiazole-5-acetate, which may be hydrolysed as in (7); (14) 2-methylthio- and 2-ethylthio-4-phenyl- and 2-methylthio-4-(41-methylphenyl)-thiazole-5-acetic acids are prepared by treating the appropriate b -bromo-b -aroylpropionic acids in the cold with the appropriate S-alkyl dithiocarbamates in isopropyl alcohol; (15) b -bromo-b -(1-naphthoyl)-propionic acid is treated with methyl dithiocarbamate in isopropyl alcohol with the addition of sodium carbonate, producing 2 - methylthio - 4 - (11 - naphthyl) - thiazole - 5 - acetic acid; (16) b - bromo - b - (2 - naphthoyl) - propionic acid is treated in the cold with methyl dithiocarbamate in isopropyl alcohol, and 2-methylthio-4-(21-naphthyl)-thiazole-5-acetic acid is liberated from the resulting hydrobromide; (17) b -bromo-b -benzoylpropionic acid is heated with selenourea in isopropyl alcohol in the presence of sodium carbonate, yielding 2-amino-4-phenylselenazole-5-acetic acid. b - Bromo - b - aroylpropionic acids, their a -alkyl and a aryl derivatives and b -bromo-b -2-thienylpropionic acid are obtainable by treating the corresponding non-brominated acids with an equimolecular proportion of bromine using chloroform as solvent, e.g. by gradual addition of bromine to a boiling solution or suspension of the acid in chloroform. Examples are given of the preparation of the b -bromo-derivatives of b -(1- and 2-naphthoyl)- propionic acids and b - 2 - thienoylpropionic acid. b -(1- and 2-Naphthoyl)-propionic acids are obtainable by condensing naphthalene with succinic anhydride in nitrobenzene in the presence of aluminium chloride. An example is given of the separation of the isomers from the resulting mixture. a -Alkyl- and a -aryl-b -aroylpropionic acids are obtainable by Friedel-Crafts condensation of alkyl and aryl substituted succinic anhydrides with aromatic hydrocarbons, e.g. of methylsuccinic anhydride with benzene to give b -benzoylisobutyric acid. b - 2 - Thienoylpropionic acid is obtainable by condensing thiophene with succinic anhydride in nitrobenzene in the presence of aluminium chloride. Methyl b -bromo-b -benzoylpropionate is obtainable by esterifying b -benzoylpropionic acid with methyl alcohol in the presence of sulphuric acid and treating the ester with bromine in chloroform solution.
GB951644A 1944-05-18 1944-05-18 Production of ª‰-2-thienoylpropionic acids and derivatives thereof Expired GB593024A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR950290D FR950290A (en) 1944-05-18 1946-08-29 Process for the preparation of 4-arylthiazol (and selenazol) -5-acetic acids and their esters

Publications (1)

Publication Number Publication Date
GB593024A true GB593024A (en) 1947-10-07

Family

ID=1629846

Family Applications (1)

Application Number Title Priority Date Filing Date
GB951644A Expired GB593024A (en) 1944-05-18 1944-05-18 Production of ª‰-2-thienoylpropionic acids and derivatives thereof

Country Status (1)

Country Link
GB (1) GB593024A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0034340A1 (en) * 1980-02-18 1981-08-26 Lonza Ag Process for the production of (2-amino-thiazol-4-yl) acetic acid hydrochloride

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0034340A1 (en) * 1980-02-18 1981-08-26 Lonza Ag Process for the production of (2-amino-thiazol-4-yl) acetic acid hydrochloride

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