(7E,13E,15E)-(4aR,16aR)-2,2,8,12,12-Pentamethyl-11-oxo-4a,5,6,9,10,11,12,16a-octahydro-4H-1,3-dioxa-benzocyclotetradecene-10-carboxylic acid methyl ester 以
甲苯 为溶剂,
反应 72.0h,
以83%的产率得到(4aR,4bS,6aR,10aR,10bS,12aR)-8-Hydroxy-3,3,7,7,10a-pentamethyl-4a,4b,6a,7,10,10a,10b,11,12,12a-decahydro-1H-2,4-dioxa-chrysene-9-carboxylic acid methyl ester