(2S)-cyclohexyl({[(2,2-dimethylhex-5-en-1-yl)oxy]carbonyl}-amino)acetic acid 、
(3R,5S)-5-(methoxycarbonyl)pyrrolidin-3-yl 4-vinyl-1,3-dihydro-2H-isoindole-2-carboxylate hydrochloride 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,
以81%的产率得到(3R,5S)-1-[(2S)-2-cyclohexyl-2-({[(2,2-dimethylhex-5-en-1-yl)-oxy]carbonyl}amino)acetyl]-5-(methoxycarbonyl)pyrrolidin-3-yl 4-vinyl-1,3-dihydro-2H-isoindole-2-carboxylate