、 在
N-甲基吗啉 作用下,
以
N,N-二甲基甲酰胺 为溶剂,
反应 12.0h,
以350 mg的产率得到tert-butyl {4-[(3-{[({(3R,5R,7R,8R,9S,10S,12S,13R,14S,17R)-17-[(22R)-9,14-bis(tert-butoxycarbonyl)-2,2-dimethyl-4,19-dioxo-3-oxa-5,9,14,18-tetraazatricosan-22-yl]-7,12-dihydroxy-10,13-dimethylhexadecahydro-1H-cyclopenta[a]phenanthren-3-yl}oxy)carbonyl]amino}propyl)(tert-butoxycarbonyl)amino]butyl}[3-({(4R)-4-[(3R,5R,8R,9S,10S,12S,13R,14S,17R)-3,12-dihydroxy-10,13-dimethylhexadecahydro-1H-cyclopenta[a]phenanthren-17-yl]pentanoyl}amino)propyl]carbamate