(2R,4R)-1-[(2,6-dichloropyridin-4-yl)carbamoyl]-2-[[4-(trifluoromethoxy)phenyl]methyl]pyrrolidine-2,4-dicarboxylic acid 、
二甲胺 在
(benzotriazo-1-yloxy)tris(dimethylamino)phosphonium hexafluorophosphate 、
N,N-二异丙基乙胺 作用下,
以
二氯甲烷 为溶剂,
反应 22.5h,
生成 (5R,7R)-5-[4-(trifluoromethoxy)benzyl]-3-(2,6-dichloro-pyridin-4-yl)-7-dimethylcarbamoyl-1,3-diazabicyclo[3.3.0]octane-2,4-dione