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
GB1174924A
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.)
Bayer AG
Original Assignee
Bayer AG
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 Bayer AGfiledCriticalBayer AG
Priority to GB1174924ApriorityCriticalpatent/GB238287A/en
Publication of GB238287ApublicationCriticalpatent/GB238287A/en
Organic Low-Molecular-Weight Compounds And Preparation Thereof
(AREA)
Abstract
Ethylidenehydrazonephenylcarboxylic acid - ethylester is prepared by transforming the hydrazine of m-aminobenzoic acid into the hydrazone by the action of acetic aldehyde, and then producing the ethyl ester therefrom. Phenylmethylhydrazonebenzylidene sulphonic acid is obtained by the condensation of phenylmethylhydrazine with a benzaldehyde sulphonic acid. Bis-nitrophenylmethylpyrazolone chloride is prepared by the chlorination of bis-nitrophenylmethylpyrazolone in carbon tetrachloride by means of chlorine. The non-chlorinated compound may be obtained by the oxidation of two molecules of nitrophenylmethylpyrazolone or directly from diacetylsuccinic acid ester and nitrophenylhydrazine.
GB1174924A1924-05-121924-05-12Process for protecting wool, fur and other materials from moth
ExpiredGB238287A
(en)