Efficient Aerobic Oxidative Coupling of Methyl Heteroarenes with Indoles.
Chemistry (Weinheim an der Bergstrasse, Germany)(2023)
摘要
Direct oxidative coupling of inert C(sp )-H bond has been a great challenge. Herein, an environmentally friendly aerobic oxidative coupling of α-methyl substituted N-heteroarenes with indoles is reported. A variety of diheteroaryl ketones were prepared in good yields (up to 72 %). This protocol features simple operation and broad substrates scope (26 examples). Significantly, a plausible mechanism about catalytic cycle was proposed, and two key intermediates were confirmed by high resolution mass spectrometry.
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关键词
C(sp3)−H,aerobic coupling reactions,heteroarylacylation,indoles,oxidative coupling reactions
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