Process for the manufacture of 3-acylazo-propionic acid...

Details Process for the manufacture of 3-acylazo-propionic acid... Process for the manufacture of 3-acylazo-propionic acid...

C - Chemistry, Metallurgy

07

D

260/470, 260/487

C07D 285/06 (2006.01) C07C 125/065 (1980.01) C07C 127/15 (1980.01)

Patent

CA 1162926

3-Acylazo-propionic acid esters of the general formula I Image (I) and isomers thereof (in which R1 represents C1-C6-alkyl and R2 represents alkoxy or amino), suitable as starting materials for the manufacture of 1,2,3-thiadiazole-5-car- boxylic acid derivatives, are prepared by a process which comprises reacting an acrylic acid ester of the general formula H2C = CH - COOR1 with a hydrazine derivative of the general formula H2N - NH - CO -R2 to form a 3-acylhydra- zino-propionic acid ester of the general formula Image and oxidizing this ester in an inert solvent with an oxidizing agent.

381868

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