Abstract
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).
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