methyl (R)-4-((3R,5R,7R,8R,9S,10S,12S,13R,14S,17R)-7,12-dihydroxy-10,13-dimethyl-3-tosylhexadecahydro-1H-cyclopenta[a]phenanthren-17-yl)pentanoate 在
四丁基硝酸铵 作用下,
以
甲苯 为溶剂,
反应 7.0h,
以60%的产率得到(R)-4-((3S,5R,7R,8R,9S,10S,12S,13R,14S,17R)-7,12-Dihydroxy-10,13-dimethyl-3-nitrooxy-hexadecahydro-cyclopenta[a]phenanthren-17-yl)-pentanoic acid methyl ester