[EN] PROCESS FOR THE PREPARATION OF PHENYLMALONIC ACID DINITRILES<br/>[FR] PROCEDE DE PREPARATION DE DINITRILES D'ACIDE PHENYLMALONIQUE
申请人:SYNGENTA PARTICIPATIONS AG
公开号:WO2004050607A1
公开(公告)日:2004-06-17
Phenylmalonic acid dinitriles are prepared by reaction of, for example, phenyl Kalides with malonic acid dinitrile in the presence of palladium catalysts and bases.
A technically feasible method has been developed for the synthesis of variety of aryl malononitriles in high yields (70-95%) using the palladium-catalyzed coupling reaction of malononitrile with aryl bromides and chlorides, respectively. The influence a several reaction parameters such as base, ligand, solvent or temperature were investigated in some detail.