Journal
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
Volume 142, Issue 16, Pages 7683-7689Publisher
AMER CHEMICAL SOC
DOI: 10.1021/jacs.0c02805
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Funding
- National Science Foundation Graduate Research Fellowship Program [DGE-1656466]
- Princeton's Presidential Postdoctoral Fellowship
- Celgene
- Princeton Innovation Fund
- NIGMS [R35 GM126986]
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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 beta-scission from a tertiary radical generated upon chlorine-mediated hydrogen atom transfer.
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