1-{3-cyano-5-(isopropoxycarbonyl)-6-[(2-oxopyrrolidin-1-yl)methyl]pyridin-2-yl}piperidine-4-carboxylic acid 、 、
1-cyclohexylmethanesulfonamide 以to give isopropyl 5-cyano-6-(4-{[(cyclobutylmethyl)sulfonyl]carbamoyl}piperidin-1-yl)-2-[(2-oxopyrrolidin-1-yl)methyl]nicotinate的产率得到isopropyl 5-cyano-6-(4-(((cyclobutylmethyl)sulfonyl)carbamoyl)piperidin-1-yl)-2-[(2-oxopyrrolidin-1-yl)methyl]nicotinate