Cobalt‐Catalyzed Radical Ligand Transfer (RLT) Enables <i>Remote</i> ‐Markovnikov Hydroamination of Alkenes

ABSTRACT Amino alcohols are prevalent in pharmaceuticals, agrochemicals, and functional materials, yet regioselective remote C─N bond formation from simple alkenes remains limited. We report a remote ‐Markovnikov formal 1,3‐hydroamination of allyl carboxylates enabled by cooperative photoredox, cobalt, and Brønsted acid catalysis. The reaction proceeds via metal–hydride hydrogen atom transfer (MHAT) followed by 1,2‐radical acyloxy migration (1,2‐RAM) to generate a tertiary carbon‐centered radical at a site remote from the original alkene, affording protected tertiary alkyl amino alcohols across a broad substrate scope, with secondary variants also accessible. Experimental and computational studies support a C─N bond‐forming step best described as radical ligand transfer (RLT) at a Co(III)─N intermediate, rather than Co(IV)/S N 2 or carbocationic pathways. This rare nitrogen‐transfer manifold accounts for the observed regioselectivity and catalyst‐influenced stereochemical outcomes. By enabling migration‐controlled 1,3‐hydroamination, this strategy complements conventional 1,2‐hydroamination and expands accessible amino alcohol chemical space.

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Publication Details

Journal
Angewandte Chemie
Published
2026-06-25
DOI
https://doi.org/10.1002/ange.8746225
Primary Topic
Radical Photochemical Reactions
Type
article
Field-Weighted Citation Impact
0.00

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article

Cobalt‐Catalyzed Radical Ligand Transfer (RLT) Enables Remote ‐Markovnikov Hydroamination of Alkenes

Peng Liu, Nuwan Pannilawithana, Ming‐Yu Ngai, H. Yuen et al.
Angewandte Chemie
Radical Photochemical Reactions
article

Cobalt‐Catalyzed Radical Ligand Transfer (RLT) Enables Remote ‐Markovnikov Hydroamination of Alkenes

Peng Liu, Nuwan Pannilawithana, Ming‐Yu Ngai, H. Yuen, Arman Khosravi, Nol Supasueb, Seth Fremin, Yu Zhang
article en

Abstract

ABSTRACT Amino alcohols are prevalent in pharmaceuticals, agrochemicals, and functional materials, yet regioselective remote C─N bond formation from simple alkenes remains limited. We report a remote ‐Markovnikov formal 1,3‐hydroamination of allyl carboxylates enabled by cooperative photoredox, cobalt, and Brønsted acid catalysis. The reaction proceeds via metal–hydride hydrogen atom transfer (MHAT) followed by 1,2‐radical acyloxy migration (1,2‐RAM) to generate a tertiary carbon‐centered radical at a site remote from the original alkene, affording protected tertiary alkyl amino alcohols across a broad substrate scope, with secondary variants also accessible. Experimental and computational studies support a C─N bond‐forming step best described as radical ligand transfer (RLT) at a Co(III)─N intermediate, rather than Co(IV)/S N 2 or carbocationic pathways. This rare nitrogen‐transfer manifold accounts for the observed regioselectivity and catalyst‐influenced stereochemical outcomes. By enabling migration‐controlled 1,3‐hydroamination, this strategy complements conventional 1,2‐hydroamination and expands accessible amino alcohol chemical space.

Angewandte Chemie
University of Pittsburgh (US), Purdue University West Lafayette (US)
National Science Foundation, National Institutes of Health
Openalex Percentile: Top 13%
Radical Photochemical Reactions
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