1-{3-cyano-5-ethoxycarbonyl-6-[(2-ethoxy-2-oxoethyl)thio]pyridin-2-yl}piperidine-4-carboxylic acid 、
1-cyclopentylmethanesulfonamide 以to give ethyl 5-cyano-6-(4-{[(cyclopentylmethyl)sulfonyl]carbamoyl}piperidin-1-yl)-2-[(2-ethoxy-2-oxoethyl)thio]nicotinate的产率得到ethyl 5-cyano-6-(4-{[(cyclopentylmethyl)sulfonyl]carbamoyl}piperidin-1-yl)-2-[(2-ethoxy-2-oxoethyl)thio]nicotinate