Methanesulfonic acid (1aS,4S,5R,5aS,8S,8aS,10aS)-4,8,10a-trimethyl-7-oxo-dodecahydro-1,6-dioxa-cyclopenta[a]cyclopropa[e]cyclodecen-5-yl ester 在
aluminum isopropoxide 作用下,
以
甲苯 为溶剂,
以100%的产率得到Methanesulfonic acid (Z)-(3S,3aS,7S,10S,11R,11aS)-7-hydroxy-3,6,10-trimethyl-2-oxo-2,3,3a,4,7,8,9,10,11,11a-decahydro-cyclodeca[b]furan-11-yl ester