1-(5-cyanopyridin-2-yl)piperidine-4-carboxylic acid 、
ethyl-[(3S,4R)-4-(4-fluoro-phenyl)-pyrrolidin-3-yl]-carbamic acid 4-fluoro-phenyl ester 在
N,N-二异丙基乙胺 、 Methanaminium,N-[(dimethylamino)(3H-1,2,3-triazolo[4,5-b]pyridin-3-yloxy)methylene]-N-methyl-, hexafluorophosphate(1-) 作用下,
以
N,N-二甲基甲酰胺 为溶剂,
反应 2.0h,
以63%的产率得到[(3S,4R)-1-(5'-cyano-3,4,5,6-tetrahydro-2H-[1,2']bipyridinyl-4-carbonyl)-4-(4-fluoro-phenyl)-pyrrolidin-3-yl]-ethyl-carbamic acid 4-fluoro-phenyl ester