1-[(3S,5R,9S,10R,13S,14S,17R)-3-(tert-Butyl-dimethyl-silanyloxy)-4,4,8,10,14-pentamethyl-hexadecahydro-cyclopenta[a]phenanthren-17-yl]-5-methyl-hex-4-en-1-ol 在
pyridiniumchlorochromate on aluminumoxide 作用下,
以
二氯甲烷 为溶剂,
反应 5.0h,
以93%的产率得到1-[(3S,5R,9S,10R,13S,14S,17R)-3-(tert-Butyl-dimethyl-silanyloxy)-4,4,8,10,14-pentamethyl-hexadecahydro-cyclopenta[a]phenanthren-17-yl]-5-methyl-hex-4-en-1-one