(3aS,4aR,5R,7aR,8R,9aR)-2-(tert-Butyl-dimethyl-silanyloxy)-8-ethoxycarbonyloxy-5-methyl-3a,8-divinyl-3a,4,4a,5,6,7,7a,8,9,9a-decahydro-1H-cyclopenta[f]azulene-3-carboxylic acid ethyl ester 在
四丁基氟化铵 作用下,
以
四氢呋喃 为溶剂,
反应 0.5h,
以100%的产率得到ethyl (3aS,5R,5aR,8R,8aR,9aS)-5,9a-bis(ethenyl)-5-ethoxycarbonyloxy-2-hydroxy-8-methyl-3a,4,5a,6,7,8,8a,9-octahydro-3H-cyclopenta[g]azulene-1-carboxylate