Process for the preparation of n-vinyl-n-alkyl-carboxylic...

Details Process for the preparation of n-vinyl-n-alkyl-carboxylic... Process for the preparation of n-vinyl-n-alkyl-carboxylic...

C - Chemistry, Metallurgy

07

C

260/557.2, 204/5

C07C 231/00 (2006.01)

Patent

CA 1128066

Abstract N-Vinyl-N-alkyl-carboxylic acid amides are pre- pared, starting from N-ethyl-carboxylic acid amides, in a 3-stage process consisting of the following stages: a) anodic alkoxylation of the N-ethyl-carboxylic acid amides to give N-.alpha.-alkoxyethyl-carboxylic acid amides: b) alkylation of these N-.alpha.-alkoxyethyl-carboxylic acid amides with an alkyl halide or dialkyl sulfate in an alkaline medium to give N-.alpha.-alkoxyethyl-n-alkyl-carboxylic acid amides; and c) splitting off of alcohol from the products of stage b) by heating to temperatures between about 60 and about 350°C. Instead of stages b) and c), it is also possible to carry out the following stages after stage a): b1) splitting off of alcohol from the N-.alpha.-alkoxyethyl- carboxylic acid amides obtained in stage a) by heating to temperatures of about 60 to about 600°C, to give N-vinyl-carboxylic acid amider; and c1) alkylation of these N-vinyl-carboxylic acid amides by reaction with on alkylating agent of the same type in stage b) in an alkaline medium. The N-vinyl-N-alkyl-carboxylic acid amides obtained by the process are valuable ? ? ? .

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