Grignard reagents react with 7-oxabicyclo[2.2.1]hept-5-ene-2,3-dicarboxylic anhydride and produce in high yields the corresponding substituted bicyclo-γ-butanolides. These lactones produce the title compounds by retro Diels-Alder reaction during distillation.
格氏试剂与7-氧杂双环[2.2.1]庚-5-烯-2,3-二
羧酸酐反应,并以高产率产生相应的取代的双环-γ-
丁醇化物。这些内酯通过蒸馏过程中的逆狄尔斯-阿尔德反应产生标题化合物。