A mild and environmentally friendly carbene-catalyzed aerobic oxidation of isoquinolinium salts was successfully realized. Accordingly, a diverse set of isoquinolinones and phenanthridinones was efficiently prepared in good to excellent yields. The mechanistic study indicates that the formation of an aza-Breslow intermediate is the crucial step in this transformation. This reaction features ambient air as the sole oxidant and oxygen source, a broad substrate scope, and excellent functional-group tolerance and proceeds under mild reaction conditions. Furthermore, a highly efficient synthesis of bioactive molecules and natural products including N-methylcrinasiadine, N-isopentylcrinasiadine, N-phenethylcrinasiadine, isoindolo[2,1-b]isoquinolin-5(7H)-one, PJ-34, rac-Gusanlung D, rosettacin, 8-oxopseudopalmatine and ilicifoline B was accomplished.

中文翻译：

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碳催化的异喹啉鎓盐的好氧氧化：异喹啉酮的有效合成

成功实现了温和环保的卡宾催化的异喹啉鎓盐的好氧氧化。因此，有效地制备了各种异喹啉酮和菲啶酮类，收率良好至优异。机理研究表明，氮杂-布雷斯洛中间体的形成是该转变的关键步骤。该反应具有环境空气作为唯一的氧化剂和氧气源，广泛的底物范围以及出色的官能团耐受性的特点，并且可以在温和的反应条件下进行。此外，生物活性分子和天然产物，包括一种高效合成Ñ -methylcrinasiadine，Ñ -isopentylcrinasiadine，Ñ -phenethylcrinasiadine，异吲哚基[2,1- b完成了] isoquinolin -5（7 H）-1，PJ-34，rac-Gusanlung D，罗塞他星，8-氧代伪巴马汀和伊利福林B的合成。