(1R,2R,4aS,6aS,6bR,8R,8aR,9S,10S,12aR,12bR,14bS)-10-Acetoxy-9-formyl-1,8-dihydroxy-1,2,6a,6b,9,12a-hexamethyl-1,3,4,5,6,6a,6b,7,8,8a,9,10,11,12,12a,12b,13,14b-octadecahydro-2H-picene-4a-carboxylic acid methyl ester 在
重铬酸吡啶 作用下,
以
二氯甲烷 为溶剂,
反应 18.0h,
以10.0 g的产率得到(1R,2R,4aS,6aS,6bR,8aR,9S,10S,12aR,12bR,14bS)-10-Acetoxy-9-formyl-1-hydroxy-1,2,6a,6b,9,12a-hexamethyl-8-oxo-1,3,4,5,6,6a,6b,7,8,8a,9,10,11,12,12a,12b,13,14b-octadecahydro-2H-picene-4a-carboxylic acid methyl ester