乙酸酐 、 (4aS,6aS,6bR,8aR,10R,11R,12aR,12bR,14bS)-10,11-Dihydroxy-9-hydroxymethyl-2,2,6a,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
吡啶 作用下,
反应 72.0h,
以5 mg的产率得到(4aS,6aS,6bR,8aR,10R,11R,12aR,12bR,14bS)-10,11-Diacetoxy-9-acetoxymethyl-2,2,6a,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