A visible-light-driven regioselective dearomative cyclization between 2-benzyl-2-bromomalonate and alkynes under mild conditions leading to the formation of spiro[4,5]decanes has been developed. In the presence of H2O, a variety of 2-benzyl-2-bromomalonates smoothly undergo 5-exo-dig radical dearomative cyclization with alkynes to afford the corresponding spiro[4,5]decanes in moderate to good yield in a step-economical manner under oxidant-free conditions.

中文翻译：

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可见光驱动脱芳香化反应对螺[4.5] deca-1,6,9-trien-8-ones的形成。

已经开发了在温和条件下导致螺[4,5]癸烷形成的可见光驱动的2-苄基-2-溴丙二酸酯和炔烃之间的区域选择性脱芳香环化反应。在存在H 2 O的情况下，各种2-苄基-2-溴丙二酸酯可通过炔烃平稳地经历5-exo-dig自由基脱芳香环化反应，以分步经济的方式以中等至良好的产率提供相应的螺[4,5]癸烷在无氧化剂的条件下。