(1S,2S,10S,13R,14S,17R,18R)-8-hydroxy-2,18-dimethyl-17-[(2R)-6-methylheptan-2-yl]-7-oxapentacyclo[11.7.0.02,10.04,8.014,18]icos-4-en-6-one 在
碘苯二乙酸 、
碘 作用下,
以
二氯甲烷 、
环己烷 为溶剂,
以56%的产率得到(2R,3aS,3bS,4'R,5aR,6R,8aS,8bR,10aS)-4'-iodo-3a,5a-dimethyl-6-((R)-6-methylheptan-2-yl)tetradecahydro-1H,2'H-spiro[dicyclopenta[a,f]naphthalene-2,3'-furan]-2',5'(4'H)-dione