A process for the α-carboxyalkylation of tryptophols and tryptamines by the functionalization of C-H bonds under visible light irradiation has been developed. The photochemical strategy activated the C-Br bonds of α-bromo-alkylcarboxylic esters to provide carbon-centered radicals under the catalysis of Ir(iii) photocatalyst and coupled with indole derivatives. This methodology displayed wide functional group tolerance and excellent regioselectivity, and was applied to the late-stage functionalization and preparation of indole-containing hybrids.

中文翻译：

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色胺醇和色胺通过CH官能化的光化学α-羧烷基化。

已经开发了在可见光照射下通过CH键的官能化使色酚和色胺的α-羧烷基化的方法。该光化学策略在Ir（iii）光催化剂的催化下并与吲哚衍生物偶联，活化了α-溴代烷基羧酸酯的C-Br键以提供以碳为中心的自由基。该方法显示出宽泛的官能团耐受性和优异的区域选择性，并应用于后期功能化和含吲哚杂种的制备。