3-Oxo-butyric acid (2R,3aR,4S,7aS)-1-eth-(E)-ylidene-7a-methyl-4-triethylsilanyloxy-octahydro-inden-2-yl ester 在
sodium hydride 作用下,
以
xylene 为溶剂,
以96%的产率得到(R)-4-((3aR,4S,7aS)-7a-Methyl-4-triethylsilanyloxy-3a,4,5,6,7,7a-hexahydro-3H-inden-1-yl)-pentan-2-one