Exocyclic nitrones smoothly participate in intramolecular cycloaddition reactions to provide bridged and fused polycarbocycles. The exploitation of this methodology in the total syntheses of the sesquiterpenes (±)-7,12-secoishwaran-12-ol (44), (±)-hirsutene (56), (±)-coriolin (68) is also presented.
环外硝酮平稳地参与分子内环加成反应,以提供桥连和稠合的多碳环。还介绍了该方法在
倍半萜(±)-7,12-secoishwaran-12-ol(44),(±)-hirsutene(56),(±)-coriolin(68)的总合成中的应用。