Chemistry of O-silylated ketene acetals1: An efficient synthesis of α-thio--heterocycles from ω-amidosulfoxides by a novel intramolecular pummerer-type rearrangement
Treatment of ω-amidosulfoxides with -silylated keteneacetals in dry acetonitrile in the presence of a catalytic amount of zinc iodide causes a novel intramolecular Pummerer-type rearrangement to give α-thio--heterocycles in high yields.
Photoinduced C(sp<sup>3</sup>)–H Chalcogenation of Amide Derivatives and Ethers via Ligand-to-Metal Charge-Transfer
作者:Ben Niu、Krishnakumar Sachidanandan、Maria Victoria Cooke、Taylor E. Casey、Sébastien Laulhé
DOI:10.1021/acs.orglett.2c01505
日期:2022.7.1
A photoinduced, iron(III) chloride-catalyzed C–H activation of N-methyl amides and ethers leads to the formation of C–S and C–Se bonds via a ligand-to-metal charge transfer (LMCT) process. This methodology converts secondary and tertiary amides, sulfonamides, and carbamates into the corresponding amido-N,S-acetal derivatives in good yields. Mechanistic work revealed that this transformation proceeds