2-(4-Trifluoromethylphenylamino)-3-methylbutanoic acid esters and
申请人:Zoecon Corporation
公开号:US04226802A1
公开(公告)日:1980-10-07
Synthesis of 2-(4-trifluoromethylphenylamino)-3-methylbutanoic acid and lower alkyl esters thereof, optionally ortho substitution on the phenylamino group, novel intermediates thereof, which are useful intermediates in the synthesis of pesticides.
An improved process for preparing substituted amino acids and lower alkyl esters thereof, and intermediates therefor, comprising reacting a substituted aniline, HCN and an aldehyde to form a nitrile, converting the nitrile to an imidate salt with a strong acid and an alcohol, hydrolyzing in situ the imidate salt to the ester with addition of water, and optionally converting the ester to the salt or free acid. The acids are useful intermediates in the synthesis of pesticides.