5β-bromo-2,5,6,7,8,8a,9,9aβ-octahydro-8aβ-methyl-2-oxonaphtho<2,3-b>furan-3-carboxylic acid methyl ester 在
1,5-二氮杂双环[4.3.0]壬-5-烯 作用下,
以
苯 为溶剂,
反应 0.33h,
以43%的产率得到2,5,6,7,8,8a-hexahydro-8a-methyl-2-oxonaphtho<2,3-b>furan-3-carboxylic acid methyl ester