2-(2,6-difluorobenzamido)pent-4-enoic acid methyl ester 、 3-(N-(4-iodophenyl)-N-(pyrimidin-2-yl)amino)propanenitrile 以to obtain ((E)-5-[4-((2-cyano-ethyl)-pyrimidin-2-yl-amino)-phenyl]-2-(2,6-difluorobenzamido)-pent-4-enoic acid methyl ester (18 mg)的产率得到(E)-5-[4-((2-cyano-ethyl)-pyrimidin-2-yl-amino)-phenyl]-2-(2,6-difluorobenzamido)-pent-4-enoic acid methyl ester