tert-butyl ((2S,3S)-3-methyl-1-(methyl((3S,3aS,5aS,5bR,9S,11aR,11bS,13aR)-2,3,11a-trimethyl-2,3,3a,4,5,5a,5b,6,8,9,10,11,11a,11b,12,13-hexadecahydro-1H-naphtho[2',1':4,5]indeno[1,7a-c]pyrrol-9-yl)amino)-1-oxopentan-2-yl)carbamate 在
三氟乙酸 作用下,
以
二氯甲烷 为溶剂,
反应 3.0h,
以65.4%的产率得到2-amino-3-(S)-methyl-pentanoic acid methyl-((3S,3aS,5aS,5bR,9S,11aR,13aR)-2,3,11a-trimethyl-2,3,3a,4,5,5a,5b,6,8,9,10,11,11a,11b,12,13-hexadecahydro-1H-2-aza-pentalenol[1,6a-a]phenanthren-9-yl)-amide