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Metal-Free C–N or C–C Bond Cleavages of α‑Azido Ketones: An Oxidative-Amidation Strategy for the Synthesis of α‑Ketothioamides and Amides

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posted on 2019-10-28, 13:35 authored by Pei Yu, Yuwei Wang, Zhigang Zeng, Yunfeng Chen
A novel metal-free oxidative-amidation strategy for the synthesis of α-ketothioamides and amides from α-azido ketones was developed. The C–H bond thionation of α-azido ketones with elemental sulfur could form α-ketothioacyl azide, which was then nucleophilically attacked by amines, causing the cleavage of the C–N bond to afford α-ketothioamides, while amides could be formed with the release of nitrogen gas and cyano anion in the presence of PhI­(OAc)2 by selective C–C bond cleavage.

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