methyl (E)-3-[(1R,2R,3R,3aR,4S,5R,7aR)-5-[(E)-6-[tert-butyl(dimethyl)silyl]oxy-3-methylhex-2-enyl]-3-hydroxy-2,6-dimethyl-1-tri(propan-2-yl)silyloxy-2,3,3a,4,5,7a-hexahydro-1H-inden-4-yl]-2-(hydroxymethyl)prop-2-enoate 在
manganese(IV) oxide 作用下,
以
甲苯 为溶剂,
反应 4.0h,
以32%的产率得到(-)-(1R,2R,3R,3aR,5aR,6aR,7S,10aS,10bR,10cR)-7-[3-(tert-butyldimethylsilanyloxy)-propyl]-1-hydroxy-2,5,7-trimethyl-3-triisopropylsilanyloxy-2,3,3a,5a,6,6a,7,10a,10b,10c-decahydro-1H-8-oxa-cyclopenta[c]fluorene-10-carboxylic acid methyl ester