Volume 57, Issue 51 pp. 16837-16841
Communication

Catalytic Radical Process for Enantioselective Amination of C(sp3)−H Bonds

Dr. Chaoqun Li

Dr. Chaoqun Li

Department of Chemistry, University of South Florida, Tampa, FL, 33620 USA

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Dr. Kai Lang

Dr. Kai Lang

Department of Chemistry, Merkert Chemistry Center, Boston College, Chestnut Hill, MA, 02467 USA

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Dr. Hongjian Lu

Dr. Hongjian Lu

Department of Chemistry, University of South Florida, Tampa, FL, 33620 USA

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Dr. Yang Hu

Dr. Yang Hu

Department of Chemistry, University of South Florida, Tampa, FL, 33620 USA

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Dr. Xin Cui

Dr. Xin Cui

Department of Chemistry, University of South Florida, Tampa, FL, 33620 USA

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Dr. Lukasz Wojtas

Dr. Lukasz Wojtas

Department of Chemistry, University of South Florida, Tampa, FL, 33620 USA

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Prof. Dr. X. Peter Zhang

Corresponding Author

Prof. Dr. X. Peter Zhang

Department of Chemistry, Merkert Chemistry Center, Boston College, Chestnut Hill, MA, 02467 USA

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First published: 22 October 2018
Citations: 127

Graphical Abstract

Radicals and Co: An enantioselective radical process has been established using cobalt(II)-based metalloradical catalysis (MRC) for stereoselective amination of aliphatic C−H bonds at room temperature to form chiral 1,3-diamines under neutral and non-oxidative conditions. The cobalt(II)-catalyzed C−H amination features an unusual degree of functional-group tolerance and chemoselectivity.

Abstract

A new catalytic radical system involving CoII-based metalloradical catalysis is effective in activating sulfamoyl azides for enantioselective radical 1,6-amination of C(sp3)−H bonds, affording six-membered chiral heterocyclic sulfamides in high yields with excellent enantioselectivities. The CoII-catalyzed C−H amination features an unusual degree of functional-group tolerance and chemoselectivity. The unique reactivity and stereoselectivity is attributed to the underlying stepwise radical pathway. The resulting optically active cyclic sulfamides can be readily converted into synthetically useful chiral 1,3-diamine derivatives without loss in enantiopurity.

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