(4S,4aR,7S,8aS)-7-[tert-butyl(diphenyl)silyl]oxy-4-[2-[(8R,9R)-8-(furan-3-yl)-9-methyl-1,4-dioxaspiro[4.4]nonan-9-yl]ethyl]-4a-methyl-1,3,4,5,6,7,8,8a-octahydronaphthalen-2-one 在
对甲苯磺酸 作用下,
以
丙酮 为溶剂,
以99%的产率得到(4S,4aR,7S,8aS)-7-[tert-butyl(diphenyl)silyl]oxy-4-[2-[(1R,2R)-2-(furan-3-yl)-1-methyl-5-oxocyclopentyl]ethyl]-4a-methyl-1,3,4,5,6,7,8,8a-octahydronaphthalen-2-one