(3R,3aS,4S,6S,7S,7aS,8R)-3-Benzyloxy-8-(tert-butyl-diphenyl-silanyloxymethyl)-3a-methyl-octahydro-4,7-ethano-indene-4,6-diol 在
pyridinium chlorochromate 作用下,
以89%的产率得到(1R,3aS,4S,7S,7aS,9R)-1-Benzyloxy-9-(tert-butyl-diphenyl-silanyloxymethyl)-7-hydroxy-7a-methyl-octahydro-4,7-ethano-inden-5-one