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TBHP‐Initiated Transamidation of Secondary Amides via C−N Bond Activation: A Metal‐Free Approach

TBHP‐Initiated Transamidation of Secondary Amides via C−N Bond Activation: A Metal‐Free Approach In the present study, a facile, efficient, and environmentally benign approach for secondary amide transamidation by using tert‐butyl hydroperoxide (TBHP) as a radical initiator has been developed. The method involves a two‐step approach in which the first step is the C−N bond activation via N‐functionalization with Boc to weaken the amide C−N bond by making amide non‐planar and electronically destabilized. In the second step, an N‐Boc‐activated secondary amides undergoes transamidation with the various primary, secondary, aliphatic, aromatic, as well as the sterically hindered amines, using TBHP as a radical initiator to give the products in good to excellent yields. TBHP is easily available, inexpensive, and an environmentally friendly radical initiator. A broad substrate scope with extensive functional group tolerance, metal and catalyst‐free approach, and operational simplicity are the important characteristics of the present protocol. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Asian Journal of Organic Chemistry Wiley

TBHP‐Initiated Transamidation of Secondary Amides via C−N Bond Activation: A Metal‐Free Approach

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References (38)

Publisher
Wiley
Copyright
© 2019 Wiley‐VCH Verlag GmbH & Co. KGaA, Weinheim
ISSN
2193-5807
eISSN
2193-5815
DOI
10.1002/ajoc.201900128
Publisher site
See Article on Publisher Site

Abstract

In the present study, a facile, efficient, and environmentally benign approach for secondary amide transamidation by using tert‐butyl hydroperoxide (TBHP) as a radical initiator has been developed. The method involves a two‐step approach in which the first step is the C−N bond activation via N‐functionalization with Boc to weaken the amide C−N bond by making amide non‐planar and electronically destabilized. In the second step, an N‐Boc‐activated secondary amides undergoes transamidation with the various primary, secondary, aliphatic, aromatic, as well as the sterically hindered amines, using TBHP as a radical initiator to give the products in good to excellent yields. TBHP is easily available, inexpensive, and an environmentally friendly radical initiator. A broad substrate scope with extensive functional group tolerance, metal and catalyst‐free approach, and operational simplicity are the important characteristics of the present protocol.

Journal

Asian Journal of Organic ChemistryWiley

Published: Jun 1, 2019

Keywords: ; ; ; ;

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