GB408638A - Improvements in or relating to the production of aromatic thio-acyl-amides - Google Patents

Improvements in or relating to the production of aromatic thio-acyl-amides

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Publication number
GB408638A
GB408638A GB2786232A GB2786232A GB408638A GB 408638 A GB408638 A GB 408638A GB 2786232 A GB2786232 A GB 2786232A GB 2786232 A GB2786232 A GB 2786232A GB 408638 A GB408638 A GB 408638A
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GB
United Kingdom
Prior art keywords
acetyl
thioacylamides
treatment
hydrogen sulphide
phosphorus
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
GB2786232A
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.)
Ilford Imaging UK Ltd
Original Assignee
Ilford Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Ilford Ltd filed Critical Ilford Ltd
Priority to GB2786232A priority Critical patent/GB408638A/en
Publication of GB408638A publication Critical patent/GB408638A/en
Expired legal-status Critical Current

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  • Thiazole And Isothizaole Compounds (AREA)
  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)

Abstract

Aromatic thioacylamides wherein the acyl group is aliphatic are prepared by treating in the absence of water the acyl derivative of an aromatic amine with a phosphorus halogen compound wherein the phosphorus is pentavalent, and treating the products without isolation with hydrogen sulphide in the presence of an inert solvent to form the corresponding thioacylamides. Suitable inert solvents are ether, benzene, carbon tetrachloride or chloroform, and the treatment with hydrogen sulphide is advantageously carried out with cooling of the reaction mixture. When the starting materials contain other reactive groups such as hydroxy or amino these are first protected by treatment with a toluenesulphonamide. In examples, the following acylamides are converted to thioacylamides by treatment with phosphorus pentachloride followed by hydrogen sulphide, the inert solvent being benzene and cooling of the reaction mixture being specified in some cases:--phenacetin, acetyl-p-anisidine, acetyl-o-toluidide, acetyl-m-xylidine, acetamidohydroquinone dimethylether (reduction and acetylation of nitrohydroquinone dimethylether), 5-acetylaminotrimethylpyrogallol, m-nitroacetanilide, 1.3- and 1.4-diacetylphenylenediamines, diacetylbenzidine, propionanilide, 2-acetylnaphthylamine, 4-acetylamino-1-methyl-naphthylamine, 4-acetylaminonaphthyl-methyl-and ethyl-ethers, 1-acetylamino-2-naphthyl ethyl ether, 2-acetylaminofluorene, 2-acetylaminodiphenyleneoxide, 5 - acetylaminoacenaphthene. The conversion of acetyl - o - anisidine, acetylaminophenanthrene, and 1-alkoxy - 2 - acetylaminonaphthalene is also mentioned. The products are useful for conversion to thiazole and thence to cyanine dyes Specifications 322,184, [Class 2 (iii)], and 351,557 are referred to.
GB2786232A 1932-10-06 1932-10-06 Improvements in or relating to the production of aromatic thio-acyl-amides Expired GB408638A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB2786232A GB408638A (en) 1932-10-06 1932-10-06 Improvements in or relating to the production of aromatic thio-acyl-amides

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB2786232A GB408638A (en) 1932-10-06 1932-10-06 Improvements in or relating to the production of aromatic thio-acyl-amides

Publications (1)

Publication Number Publication Date
GB408638A true GB408638A (en) 1934-04-06

Family

ID=10266509

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2786232A Expired GB408638A (en) 1932-10-06 1932-10-06 Improvements in or relating to the production of aromatic thio-acyl-amides

Country Status (1)

Country Link
GB (1) GB408638A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3213076A (en) * 1962-04-19 1965-10-19 Archer Daniels Midland Co Sulfurization of schiff base

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3213076A (en) * 1962-04-19 1965-10-19 Archer Daniels Midland Co Sulfurization of schiff base

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