[S-(R*,S*)]-5-(1,5-dimethylhexen-4-yl)-2-methyl-1,3-cyclohexa-1,3-diene 、 5-epi-hyperolactone C 在
2-萘乙酮 作用下,
以
二氯甲烷 为溶剂,
反应 12.0h,
以44%的产率得到(2R,3aR,3bS,4S,4'S,7aS,7bS)-4',7-dimethyl-4-((R)-6-methylhept-5-en-2-yl)-7b-phenyl-4'-vinyl-3a,3b,4,4',5,5',7a,7b-octahydro-2'H,3H-spiro[benzo[3,4]cyclobuta[1,2-b]furan-2,3'-furan]-2',3-dione