(2S,4R)-4-(2-chlorophenylsulfonyl)-N-(1-cyanocyclopropyl)pyrrolidine-2-carboxamide 、
lithium 1-(tetrahydro-2H-thiopyran-4-yl)azetidine-2-carboxylate 以yielded (2S,4R)-4-(2-chlorophenylsulfonyl)-N-(1-cyanocyclopropyl)-1-(1-(tetrahydro-2H-thiopyran-4-yl)azetidine-2-carbonyl)pyrrolidine-2-carboxamide 1:1 epimers as a light brown solid (quant.)的产率得到(2S,4R)-4-(2-chlorophenylsulfonyl)-N-(1-cyanocyclopropyl)-1-(1-(tetrahydro-2H-thiopyran-4-yl)azetidine-2-carbonyl)pyrrolidine-2-carboxamide