NOVEL PROCESS FOR THE PREPARATION OF PYRAZOLES

摘要

There is provided a process for the production of pyrazole compounds of general formula (II): (see formula I) wherein R P represents H or R1; which process comprises the reaction of a compound of general formula (III), (see formula II) 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.