28-iodo-3',5'-dioxo-4'-phenyl-3β-(tert-butyldimethylsilyloxy)-5α,8α<1',2'>-1',2',4'-triazolidino-6-ergostene 在
1,8-二氮杂双环[5.4.0]十一碳-7-烯 作用下,
以
xylene 为溶剂,
反应 0.5h,
以61%的产率得到tert-butyl-[[(3S,9S,10R,13R,14R,17R)-10,13-dimethyl-17-[(2R)-6-methyl-5-methylideneheptan-2-yl]-2,3,4,9,11,12,14,15,16,17-decahydro-1H-cyclopenta[a]phenanthren-3-yl]oxy]-dimethylsilane