Preparation of pyrazoles

Details Preparation of pyrazoles Preparation of pyrazoles

C - Chemistry, Metallurgy

07

D

260/315.3

C07D 237/06 (2006.01) C07D 231/12 (2006.01) C07D 231/14 (2006.01) C07D 231/16 (2006.01) C07D 231/18 (2006.01)

Patent

CA 1141390

Abstract of the disclosure: Pyrazoles are prepared by reacting 1,3-dicarbonyl compounds with hydrazines and a less than equivalent amount of acid at a pH of from 0 to 6.9. The pyrazoles obtainable by the novel process are valuable starting materials for the prepar- ation of dyes, crop protection agents and drugs.

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