1-{3-cyano-5-(ethoxycarbonyl)-6-[(2-oxo-pyrrolidin-1-yl)methyl]pyridin-2-yl}piperidine-4-carboxylic acid 、
4-Trimethylsilyl-phenylmethansulfonamid 以to give ethyl 5-cyano-2-[(2-oxopyrrolidin-1-yl)methyl]-6-[4-({[4-(trimethylsilyl)benzyl]sulfonyl}carbamoyl)piperidin-1-yl]nicotinate的产率得到ethyl 5-cyano-2-[(2-oxopyrrolidin-1-yl)methyl]-6-[4-({[4-(trimethylsilyl)benzyl]sulfonyl}carbamoyl)piperidin-1-yl]nicotinate