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公开(公告)号：AT555098T
公开(公告)日：2012-05-15
申请号：AT09780455
申请日：2009-07-10
Applicant: BASF SE
Inventor： WOLF BERND , SMIDT SEBASTIAN , MAYWALD VOLKER , KORADIN CHISTOPHER , RACK MICHAEL , KEIL MICHAEL , ZIERKE THOMAS
IPC: C07D233/90
Abstract: A process for preparing 1,3-disubstituted pyrazolecarboxylic esters of the formula (I) where X, Y, Z=hydrogen or halogen and R1=C1-C6-alkyl, by metering an enol ether of the formula III where R2 is C1-C6-alkyl at from (−41) to (−80)° C. into an alkyl hydrazine of the formula II H2N—NH-lower alkyl (II).
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