化学
芳基
光催化
催化作用
甲基化
试剂
甲基自由基
激进的
镍
有机化学
光化学
原甲酸三乙酯
组合化学
烷基
光催化
生物化学
基因
作者
Stavros K. Kariofillis,Benjamin J. Shields,Makeda A. Tekle‐Smith,Michael J. Zacuto,Abigail G. Doyle
摘要
Methylation of organohalides represents a valuable transformation, but typically requires harsh reaction conditions or reagents. We report a radical approach for the methylation of (hetero)aryl chlorides using nickel/photoredox catalysis wherein trimethyl orthoformate, a common laboratory solvent, serves as a methyl source. This method permits methylation of (hetero)aryl chlorides and acyl chlorides at an early and late stage with broad functional group compatibility. Mechanistic investigations indicate that trimethyl orthoformate serves as a source of methyl radical via β-scission from a tertiary radical generated upon chlorine-mediated hydrogen atom transfer.
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