16-((7R,8R,9S,13S,14S,17S)-3-hydroxy-17-methoxy-13-methyl-7,8,9,11,12,13,14,15,16,17-decahydro-6H-cyclopenta[a]phenanthren-7-yl)-3,6,9,12-tetraoxahexadecan-1-oic acid 、
(2S,4R)-1-((S)-2-氨基-3,3-二甲基丁酰基)-4-羟基-N-(4-(4-甲基噻唑-5-基)苄基)吡咯烷-2-甲酰胺盐酸盐 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 0.5h,
以76%的产率得到(2S,4R)-1-((S)-2-(tert-butyl)-19-((7R,8R,9S,13S,14S,17S)-3-hydroxy-17-methoxy-13-methyl-7,8,9,11,12,13,14,15,16,17-decahydro-6H-cyclopenta[a]phenanthren-7-yl)-4-oxo-6,9,12,15-tetraoxa-3-azanonadecan-1-oyl)-4-hydroxy-N-(4-(4-methylthiazol-5-yl)benzyl)pyrrolidine-2-carboxamide