(6aR,7S,9aS,13aS)-5-(t-butyldimethylsilyloxy)-2,3,6,6a,7,8,9,9a,10,11,12,13-dodecahydro-6a,7,10,10-tetramethyl-3,11-dioxo-1H-benzo[8,8a][1]benzopyrano[2,3-e]isoindole 在
sodium borohydrid 作用下,
以
甲醇 、
水 为溶剂,
以106 mg (60%)的产率得到(6aR,7S,9aS,11R,13aS)-5-(t-butyldimethylsilyloxy)-2,3,6,6a,7,8,9,9a,10,11,12,13-dodecahydro-11-hydroxy-6a,7,10,10-tetramethyl-3-oxo-1H-benzo[8,8a][1]benzopyrano[2,3-e]isoindole