methyl (4R)-4-[(3R,5S,7R,8R,9S,10S,12S,13R,14S,17R)-3-amino-12-[[(2S)-2-(9H-fluoren-9-ylmethoxycarbonylamino)-3-phenylpropanoyl]amino]-10,13-dimethyl-7-[[(2S)-3-methyl-2-[(2-methylpropan-2-yl)oxycarbonylamino]butanoyl]amino]-2,3,4,5,6,7,8,9,11,12,14,15,16,17-tetradecahydro-1H-cyclopenta[a]phenanthren-17-yl]pentanoate 、
BOC-甘氨酸 在
1-羟基苯并三唑 、 O-(benzotriazol-1-yl)-N,N,N',N'-tetramethyluronium tetrafluoroborate 、
N,N-二异丙基乙胺 作用下,
以
二氯甲烷 、
N,N-二甲基甲酰胺 为溶剂,
反应 24.0h,
以124 mg的产率得到methyl (4R)-4-[(3R,5S,7R,8R,9S,10S,12S,13R,14S,17R)-12-[[(2S)-2-(9H-fluoren-9-ylmethoxycarbonylamino)-3-phenylpropanoyl]amino]-10,13-dimethyl-7-[[(2S)-3-methyl-2-[(2-methylpropan-2-yl)oxycarbonylamino]butanoyl]amino]-3-[[2-[(2-methylpropan-2-yl)oxycarbonylamino]acetyl]amino]-2,3,4,5,6,7,8,9,11,12,14,15,16,17-tetradecahydro-1H-cyclopenta[a]phenanthren-17-yl]pentanoate