二甘醇酐 、 benzyl (2S,4aS,6aR,6aS,6bR,8aR,10S,12aS,14bR)-10-amino-2,4a,6a,6b,9,9,12a-heptamethyl-13-oxo-3,4,5,6,6a,7,8,8a,10,11,12,14b-dodecahydro-1H-picene-2-carboxylate 在
吡啶 、
4-二甲氨基吡啶 作用下,
反应 132.0h,
以33.96%的产率得到2-(2-(((3S,4aR,6aR,6bS,8aS,11S,12aR,14aR,14bS)-11-((benzyloxy)carbonyl)4,4,6a,6b,8a,11,14b-heptamethyl-14-oxo-1,2,3,4,4a,5,6,6a,6b,7,8,8a,9,10,11,12,12a,14,14a,14b-icosahydropicen-3-yl)amino)-2-oxoethoxy)acetic acid