(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
TMPAP 作用下,
以
1,4-二氧六环 、
水 为溶剂,
反应 5.0h,
生成
ent-3α,13-diacetoxy-17-bromo-10β,16β-dihydroxy-20-norgibberell-1-ene-7,19-dioic acid 19,10-lactone 7-methyl ester