((3S,4S)-4-Trifluoromethyl-pyrrolidin-3-ylmethyl)-carbamic acid tert-butyl ester 、
[2-fluoro-4-(2-oxo-2H-pyridin-1-yl)-phenyl]-carbamic acid 4-nitro-phenyl ester 以to give {(3R,4S)-1-[2-fluoro-4-(2-oxo-2H-pyridin-1-yl)-phenylcarbamoyl]-4-trifluoromethyl-pyrrolidin-3-ylmethyl}-carbamic acid tert-butyl ester的产率得到{(3R,4S)-1-[2-fluoro-4-(2-oxo-2H-pyridin-1-yl)-phenylcarbamoyl]-4-trifluoromethyl-pyrrolidin-3-ylmethyl}-carbamic acid tert-butyl ester