((2R,4aR,6R,7S,8aR,9aS,10aS)-6-Hydroxy-6,10a-dimethyl-2-phenyl-octahydro-1,3,8,10-tetraoxa-anthracen-7-yl)-acetic acid ethyl ester 在
2,6-二甲基吡啶 、 lithium aluminium tetrahydride 作用下,
以
乙醚 、
二氯甲烷 为溶剂,
生成
(2R,4aR,6R,7S,8aR,9aS,10aS)-6-(tert-Butyl-dimethyl-silanyloxy)-7-[2-(tert-butyl-dimethyl-silanyloxy)-ethyl]-6,10a-dimethyl-2-phenyl-octahydro-1,3,8,10-tetraoxa-anthracene