[(4aS,12aR,12bS)-11-(methoxymethoxy)-4,4,6a,12b-tetramethyl-1,2,3,4a,5,6,12,12a-octahydrobenzo[a]xanthen-9-yl]methyl acetate 在
camphor-10-sulfonic acid 作用下,
以
乙醇 为溶剂,
反应 24.0h,
以87%的产率得到(4aS,6aS,12aR,12bS)-1,2,3,4,4a,5,6,6a,12a,12b-decahydro-11-hydroxy-9-hydroxymethyl-4,4,6a,12b-tetramethyl-benzo[a]xanthene