(2S,4R)-4-(2-chlorophenylsulfonyl)-N-(1-cyanocyclopropyl)pyrrolidine-2-carboxamide 、
lithium 1-(4,4-difluorocyclohexyl)azetidine-2-carboxylate 以yielded (2S,4R)-4-(2-chlorophenylsulfonyl)-N-(1-cyanocyclopropyl)-1-(1-(4,4-difluorocyclohexyl)azetidine-2-carbonyl)pyrrolidine-2-carboxamide 1:1 epimers as an off-white solid (47%)的产率得到(2S,4R)-4-(2-chlorophenylsulfonyl)-N-(1-cyanocyclopropyl)-1-(1-(4,4-difluorocyclohexyl)azetidine-2-carbonyl)pyrrolidine-2-carboxamide