(1aS,4S,4aS,5S,8aR,9aR)-1a,2,3,4,4a,5,8a,9-octahydro-5-hydroxy-8a-methoxy-4,4a,6-trimethyl-7H-oxireno[8,8a]naphtho[2,3-b]furan-7-one 在
高氯酸 作用下,
以
四氢呋喃 为溶剂,
以78%的产率得到(4S,4aS,5S,8R,8aR,9aR)-4a,5,6,7,8,8a,9,9a-octahydro-4,8,8a-trihydroxy-9a-methoxy-3,4a,5-trimethylnaphtho[2,3-b]furan-2(4H)one