ethyl (1R,2S)-1-((2S,4S)-4-hydroxypyrrolidine-2-carboxamido)-2-vinylcyclopropane-1-carboxylate hydrochloride 、
(R)-2-(Hex-5-enyloxy)propanoic acid 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 1.13h,
以71%的产率得到ethyl (1R,2S)-2-ethenyl-1-[[(2S,4S)-1-[(2R)-2-hex-5-enoxypropanoyl]-4-hydroxypyrrolidine-2-carbonyl]amino]cyclopropane-1-carboxylate