Acetic acid (3R,3aR,4R,7S,7aR,8aS,8cS)-4-acetoxy-3,6,8a-trimethyl-2-oxo-2,3,3a,4,5,7,7a,8a,8b,8c-decahydro-1,8-dioxa-cyclopenta[h]cyclopropa[a]azulen-7-yl ester 在
Tonsil Optimum Extra 作用下,
以
苯 为溶剂,
反应 70.0h,
以72%的产率得到Acetic acid (3R,3aR,4R,7S,8S,9S,9bS)-4-acetoxy-8,9-dihydroxy-3,6,9-trimethyl-2-oxo-2,3,3a,4,5,7,8,9,9a,9b-decahydro-azuleno[4,5-b]furan-7-yl ester