magnesium,2-hexoxyoxane,bromide 、
3-<3',17'β-di-(tert-butyldimethylsilyloxy)-1',3',5'(10')-estratrien-16α-yl>propanal 以
四氢呋喃 为溶剂,
以46%的产率得到1-[(8R,9S,13S,14S,16R,17S)-3,17-Bis-(tert-butyl-dimethyl-silanyloxy)-13-methyl-7,8,9,11,12,13,14,15,16,17-decahydro-6H-cyclopenta[a]phenanthren-16-yl]-9-(tetrahydro-pyran-2-yloxy)-nonan-3-ol