maoecrystal V are reported. An oxidative dearomatization/Diels–Alder cascade to assemble the natural product carbocyclic core in one step is proposed. A facile electrocyclization is shown to suppress the intramolecular allene Diels–Alder pathway. This obstacle is alleviated via a stepwise approach with an allene equivalent to access the key cyclopentadiene-fused [2.2.2]-bicyclic core. Upon treatment with Lewis
报道了对毛晶V的合成研究。提出了一种通过氧化脱芳香化/ Diels-Alder级联反应在一个步骤中组装
天然产物碳环核的方法。研究表明,简单的电环化可以抑制分子内亚伦Diels-Alder途径。通过逐步使用
异戊二烯来访问关键的
环戊二烯稠合的[2.2.2]-双环核心,可以缓解此障碍。经
路易斯酸处理后,拟议的分子内杂狄尔斯-阿尔德反应可通过C-C键形成的片段清晰地转移至螺-
茚化合物(当R = OMe时)或通过消除(当R = H时) 。