ent-2β,3α,13-trihydroxy-20-norgibberell-1(10),16-diene-7,19-dioic acid 19-2β-lactone 在
N,N-二异丙基乙胺 作用下,
以
二氯甲烷 为溶剂,
生成 (1S,4R,5bR,8S,10aS,11S,11aS,13R)-N-(2-Bromoethyl)-8,13-dihydroxy-1-methyl-9-methylene-2-oxo-2,4,5b,6,7,8,9,10,11,11a-decahydro-1H-1,4:8,10a-dimethanoazuleno[1,2-d]oxepine-11-carboxamide