(1R,3R,12bS)-1-(tert-Butyl-dimethyl-silanyloxy)-3-methyl-1,2,3,4,6,12b-hexahydro-benzo[a]anthracene-7,12-dione 在
间氯过氧苯甲酸 作用下,
以
二氯甲烷 为溶剂,
反应 4.0h,
以86%的产率得到(2S,3R,5S,7S,9R)-3-[tert-butyl(dimethyl)silyl]oxy-5-methyl-8-oxapentacyclo[9.8.0.02,7.07,9.013,18]nonadeca-1(11),13,15,17-tetraene-12,19-dione