(R)-3-{(R)-4-[2-[(3S,5R)-3,5-Bis-(tert-butyl-dimethyl-silanyloxy)-2-methylene-cyclohex-(Z)-ylidene]-eth-(E)-ylidene]-7a-methyl-octahydro-inden-1-yl}-butyronitrile 在
二异丁基氢化铝 作用下,
以
二氯甲烷 为溶剂,
以88%的产率得到(5Z,7E,20R)-1α,3β-bis[(tert-butyldimethylsilyl)oxy]-20-formylmethyl-9,10-seco-5,7,10(19)-pregnatriene