2,6-dimethyl-1-methylsulfonyl-4-phenyl-5-phenylmethoxycarbonyl-4H-pyridine-3-carboxylic acid 、 (2R,3S)-3-amino-1-(cyclopropylamino)-4-phenylbutan-2-ol 在
benzotriazol-1-yloxyl-tris-(pyrrolidino)-phosphonium hexafluorophosphate 、
N,N-二异丙基乙胺 作用下,
以
二氯甲烷 为溶剂,
反应 0.25h,
以62.6%的产率得到benzyl 5-((2S,3R)-4-(cyclopropylamino)-3-hydroxy-1-phenylbutan-2-ylcarbamoyl)-2,6-dimethyl-1-(methylsulfonyl)-4-phenyl-1,4-dihydropyridine-3-carboxylate