3β-chloro-5-hydroxy-5α-cholestan-6-one 、
1,2-乙二硫醇 在
三氟化硼乙醚 作用下,
以
溶剂黄146 为溶剂,
反应 48.0h,
以64%的产率得到(3'S,5'R,8'S,9'S,10'R,13'R,14'S,17'R)-3'-chloro-10',13'-dimethyl-17'-[(2R)-6-methylheptan-2-yl]spiro[1,3-dithiolane-2,6'-2,3,4,7,8,9,11,12,14,15,16,17-dodecahydro-1H-cyclopenta[a]phenanthrene]-5'-ol