MCDOUGALD GRAHAM,MUXWORTHY JAMES PETER,WILDE BEVERLEY ANN
申请号：
IN7849/DELNP/2011
公开号：
IN2011DN07849A
申请日:
2011.10.12
申请国别(地区):
IN
年份:
2012
代理人:
摘要：
The present invention relates to improvements in processes towards the production 3- difluoromethyl-1 -methyl- 1 H-pyrazole-4-carboxylic acid, which is a useful intermediate in fungicide production. In particular, the invention relates to a process for treating a compound of formula III, wherein R1 is C1-C6 alkyl and R2 is CF3, CF2H or CFH2, comprising the steps of a) contacting a compound of formula III with base, and b) separating the compound of formula III and the base.
