Processes for the preparation of pyrazole compounds

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...

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Main Authors SUGA SHIGEMI, YAGIHARA TOMIO, OOKUCHI TETSUSHI, KASAHARA ISAMU, IMAGAWA TSUTOMU, HATANO MASAMI, SHIBATA YASUSHI
Format Patent
LanguageEnglish
Published 29.01.2004
Edition7
Subjects
CHEMISTRY
HETEROCYCLIC COMPOUNDS
METALLURGY
ORGANIC CHEMISTRY
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Summary: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 same which comprises using a pyrazolecarboxylic acid and a cyanoacetate ester; a process (3) for the preparation of the same which comprises using a pyrazolecarbonitrile; and a process (4) for the preparation of the same which comprises using a haloacetylpyrazole. Furthermore, an industrially advantageous process for preparing pyrazolecarboxylic acids useful as intermediates in the above processes.
Bibliography:Application Number: US20030344061