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