(4aS,5R,6S,7S,7aS)-5-[tert-butyl(dimethyl)silyl]oxy-7-[(1S,3S)-4-[tert-butyl(dimethyl)silyl]oxy-1-[tert-butyl(diphenyl)silyl]oxy-3-methylbutyl]-3-(cyclohepten-1-yl)-4a,6-dimethyl-3,4,5,6,7,7a-hexahydrocyclopenta[c]pyran-1-one 在
dimethyltitanocene 作用下,
以
甲苯 为溶剂,
反应 1.5h,
以66%的产率得到[(4aS,5R,6S,7S,7aS)-7-[(1S,3S)-4-[tert-butyl(dimethyl)silyl]oxy-1-[tert-butyl(diphenyl)silyl]oxy-3-methylbutyl]-3-(cyclohepten-1-yl)-4a,6-dimethyl-1-methylidene-3,4,5,6,7,7a-hexahydrocyclopenta[c]pyran-5-yl]oxy-tert-butyl-dimethylsilane