Novel process for the preparation of pyrazoles

Details Novel process for the preparation of pyrazoles Novel process for the preparation of pyrazoles

C - Chemistry, Metallurgy

07

D

C07D 487/04 (2006.01) C07D 231/14 (2006.01) C07D 231/38 (2006.01) C07D 471/04 (2006.01)

Patent

CA 2354173

There is provided a process for the production of pyrazole compounds of general formula (II): (see formula II) wherein R P represents H or R1; which process comprises the reaction of a compound of general formula (III), (see formula III) wherein R11a and R11b independently represent C1-C6 alkyl, R2 is as defined herein before, with an acylating agent in the presence of a base, followed by in situ reaction with a hydrazine compound, wherein said process is optionally carried out in the presence of an activating agent.

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