(1S,2R,4aR,4bR,7S,9aS,10S,10aR)-10-(methoxycarbonyl)-1-methyl-8-methylene-13-oxo-1,2,5,6,8,9,10,10a-octahydro-4a,1-(epoxymethano)-7,9a-methanobenzo[a]azulene-2,7(4bH)-diyl diacetate 在
叔丁基过氧化氢 、 selenium(IV) oxide 作用下,
以
二氯甲烷 为溶剂,
反应 14.0h,
以375 mg的产率得到ent-3α,13-diacetoxy-10β,15β-dihydroxy-20-norgibberella-1,16-diene-7,19-dioic acid 7-methyl ester 19,10-lactone