4-Fluoro-5-oxypyrazole derivate and preparation thereof.

摘要

4-Fluoro-5-oxypyrazole derivative having the formula
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wherein R1, represents hydrogen atom or a lower alkyl group: and R2 represents a lower alkyl or phenyl group or a phenyl group having one or more substituent of fluorine or chlorine atom or a lower alkyl or dimethylamino group as effective intermediates for agricultural and pharmaceutical chemicals.