By using a gallium(III) triflate catalyzed intramolecular (4+3) cycloaddition, a few functionalized furan-derived tricycles that share the common guaianolide sesquiterpene ring system were prepared in a stereoselective manner in only three steps from commercially available starting materials. A discussion of the formation of alternative products is included, with possible substrate requirements to
通过使用
镓 (III)
三氟甲磺酸酯催化的分子内 (4+3) 环加成反应,仅通过三步从市售原料中以立体选择性方式制备了一些共享常见
愈创木酚内酯
倍半萜烯环系统的官能化
呋喃衍生
三环化合物。包括对替代产物形成的讨论,以及以有效方式实现关键环加成步骤的可能底物要求。