Processes for the preparation of pyrazole compounds

• Main Authors: SUGA SHIGEMI, YAGIHARA TOMIO, OOKUCHI TETSUSHI, KASAHARA ISAMU, IMAGAWA TSUTOMU, HATANO MASAMI, SHIBATA YASUSHI
• Format: Patent
• Language: English
• Published: 29.01.2004
• Edition: 7
• Subjects: CHEMISTRY; HETEROCYCLIC COMPOUNDS; METALLURGY; ORGANIC CHEMISTRY

A process (1) for the preparation of 4-cyanoacetylpyrazoles of the general formula (I) wherein R is C1-6 alkyl, R is C1-6 alkyl or C1-6 haloalkyl, and X is hydrogen or C1-6 alkyl which comprises using a pyrazolecarboxylic acid halide and a cyanoacetate ester; a process (2) for the preparation of the...