(3aR,4S,7aS)-7a-methyl-1-[1-(5,5,5-trifluoro-4-hydroxy-4-trifluoromethyl-pent-2-ynyl)-cyclopropyl]-3a,4,5,6,7,7a-hexahydro-3H-inden-4-ol 在
正丁基锂 作用下,
以
四氢呋喃 为溶剂,
反应 3.75h,
以86%的产率得到1α,3β-di(tert-butyl-dimethyl-silanyloxy)-25-trimethylsilanyloxy-16-ene-20-cyclopropyl-23,24-yne-26,27-hexafluoro-19-nor-cholecalciferol