[EN] PROCESS FOR THE PREPARATION OF PYRAZOLE CARBOXYLIC ACID AMIDES<br/>[FR] PROCÉDÉ DE SYNTHÈSE D'AMIDES D'ACIDE PYRAZOLECARBOXYLIQUE
申请人:SYNGENTA PARTICIPATIONS AG
公开号:WO2011131543A1
公开(公告)日:2011-10-27
The invention relates to a process for the preparation of formula (I), which process comprises a) reacting the compound (II), with cyclopentadiene to (III); b) reacting this compound in the presence of an oxidant to the compound of formula (IV); c) hydrogenating this compound in the presence of a metal catalyst and an inert solvent under hydrogen atmosphere to the compound of formula (V); d) reacting this compound in the presence of a Brönsted acid followed by a reducing agent to the compound of formula (VI); e) reacting VI with a compound (VII), in the presence of a base to a compound of formula (VIII); f) converting the compound of formula VIII in the presence of an oxidising agent to the compound of formula (IX); and g) reacting the compound of formula IX in the presence of triphenylphosphane/carbon tetrachloride or riphenylphosphane/bromotrichloromethane to the compound of formula I.