[EN] METHOD FOR THE PREPARATION OF 3-(TRIFLUOROMETHYL)PYRAZINE-2-CARBOXYLIC ACID ESTERS<br/>[FR] PROCÉDÉ DE PRÉPARATION D'ESTERS D'ACIDE 3- (TRIFLUOROMÉTHYL) PYRAZINE-2-CARBOXYLIQUE
申请人:LONZA AG
公开号:WO2018041853A1
公开(公告)日:2018-03-08
The invention discloses a method for the preparation of 3-(trifluoromethyl)pyrazine-2-carboxylic acid esters starting from alkyl 4,4,4-trifluoro-2-(hydroxyimino)-3-oxobutanoates by reaction with ethylenediamine.