A novel synthesis of the quinazolinequinone (5) and the carbazolequinone (9) is described. Anionic cycloaddition of the heterocyclic esters (1 and 6) with phenyl β-trimethylsilylvinyl sulfone (2c) afforded the cycloadducts (3 and 7), which were converted to the quinones (5 and 9) via the phenols (4 and 8). This method was applied to a covenient synthesis of murrayaquinone A (10).
描述了
喹唑啉醌(5)和
咔唑醌(9)的一种新合成方法。将杂环酯(1和6)与苯基β-三甲基
硅基
乙烯基砜(2c)进行阴离子环加成得到环加成产物(3和7),然后通过
酚类化合物(4和8)转化为
醌类化合物(5和9)。这种方法被应用于murrayaquinone A (10)的便捷合成。