(4aR,4bR,10aR)-6-(tert-Butyl-dimethyl-silanyloxy)-1,1,4a,7-tetramethyl-9-oxo-1,3,4,4a,4b,5,8,9,10,10a-decahydro-2H-phenanthrene-8a-carbaldehyde 在
sodium methylate 作用下,
以
甲醇 为溶剂,
反应 16.0h,
以94%的产率得到cis-4a-cisoid-4a,4b-trans-4b-3-(tert-butydimethylsilyloxy)-1,4,4a,4b,5,6,7,8,8a,10a-decahydro-2,4bβ,8,8-tetramethylphenanthrene-10(9H)-on