Process for the manufacture of acylhydrazones of...

Details Process for the manufacture of acylhydrazones of... Process for the manufacture of acylhydrazones of...

C - Chemistry, Metallurgy

07

C

260/470, 260/487

C07C 69/00 (2006.01) A01N 43/82 (2006.01) C07C 53/08 (2006.01) C07D 285/06 (2006.01)

Patent

CA 1134382

ABSTRACT Acylhydrazones of formylacetic acid esters of the general formula I Image (I) (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 derivatives, are pre- pared by reacting a propiolic avid ester of the general formula II H - C ? C - COOR1 (II) with a hydrazine derivative of the general formula III H2N - NH - CO - R2 (III) in the presence of water and/or an organic solvent. ':

364094

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