4.7 Article

Carboxyl group assisted isodesmic meta-C-H iodination of phenethylamines, benzylamines, and 2-aryl anilines

Journal

ORGANIC CHEMISTRY FRONTIERS
Volume 10, Issue 15, Pages 3760-3765

Publisher

ROYAL SOC CHEMISTRY
DOI: 10.1039/d3qo00479a

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This study reports a Pd-catalyzed remote isodesmic meta-C-H iodination of phenethylamines, benzylamines, and 2-aryl anilines using 1-iodo-4-methoxy-2-nitrobenzene as the mild iodinating reagent. A range of valuable meta-iodinated and even multi-halogenated amines were successfully synthesized, paving the way for synthetic chemists to access various amine derivatives at the challenging meta-positions.
Isodesmic C-H activation reactions are still very limited and they represent mild alternatives to other C-H transformations that require reactive agents. Meanwhile, iodinating arenes at unconventional positions is challenging but also useful. Herein, we report a Pd-catalyzed remote isodesmic meta-C-H iodination of phenethylamines, benzylamines, and 2-aryl anilines using 1-iodo-4-methoxy-2-nitrobenzene as the mild iodinating reagent in a site-selective and chemo-selective manner. A range of valuable meta-iodinated and even multi-halogenated amines were afforded smoothly, paving the way for synthetic chemists to access various amine derivatives at the challenging meta-positions.

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