Radical O→C Transposition: A Metal-Free Process for Conversion of Phenols into Benzoates and Benzamides
作者:Abdulkader Baroudi、Jeremiah Alicea、Phillip Flack、Jason Kirincich、Igor V. Alabugin
DOI:10.1021/jo102467j
日期:2011.3.18
We report a metal-free procedure for transformation of phenols into esters and amides of benzoic acids via a new radical cascade. Diaryl thiocarbonates and thiocarbamates, available in a single high-yielding step from phenols, selectively add silyl radicals at the sulfur atom of the C═S moiety. This addition step, analogous to the first step of the Barton−McCombie reaction, produces a carbon radical