Thiyl Radical-Mediated Cleavage of Allylic C−N Bonds: Scope, Limitations, and Theoretical Support to the Mechanism
作者:Stéphanie Escoubet、Stéphane Gastaldi、Vitaliy I. Timokhin、Michèle P. Bertrand、Didier Siri
DOI:10.1021/ja049859x
日期:2004.10.1
Thiols mediate the radical isomerization of allylic amines into enamines. The reaction results in the cleavage of the allylic C-N bond, after treatment with aqueous HCl. The mechanism involves the abstraction of an allylic hydrogen alpha to nitrogen by thiylradical, followed by a return hydrogen transfer from the thiol to the carbon gamma to nitrogen in the intermediate allylic radical. The scope and
Tandem radical and non-radical reactions mediated with thiols—a new method of cleavage of allylic amines
作者:Michèle P. Bertrand、Stéphanie Escoubet、Stéphane Gastaldi、Vitaliy I. Timokhin
DOI:10.1039/b109781d
日期:2002.1.30
Thiyl radical promotes the isomerisation of allylic amines into enamines via two consecutive hydrogen atom abstraction steps, and the subsequent polar addition of the corresponding thiol to the enamine results in the cleavage of the CâN bond via a thioaminal intermediate: this reaction provides a mild, metal-free methodology for the deprotection of allylated primary and secondary amines.