Cyclization of 3-(arylchalcogeno)propenoyl chlorides. 2. Chalcogen and substituent control in the regiochemistry of intramolecular acylation. Preparation of benzo[b]telluropyrones
Alkynyl Sulfonium Salts Can Be Employed as Chalcogen‐Bonding Catalysts and Generate Alkynyl Radicals under Blue‐Light Irradiation
作者:Yu Lu、Qiang Liu、Zhi‐Xiang Wang、Xiang‐Yu Chen
DOI:10.1002/anie.202116071
日期:2022.4.11
Alkynyl sulfonium salts were employed as chalcogen bonding (ChB) catalysts for the first time. They display superior capability in the generation of alkynyl radicals under blue-light irradiation.
A photoactive charge transfer complex protocol for the generation of cyanoalkyl radicals from cyclobutanone oxime esters with dichalcogenides is established.
We report the Lewis acid catalysis of aryldiazoniumsalts, and their Lewis acidity applications in photogeneration of aryl radicals under additive-, photocatalyst- and transition metal-free conditions. In this visible light-mediated transformation, the Lewis acidic character of aryldiazoniumsalts enables access to the photoactive charge transfer complex with dichalcogenides. The usefulness and versatility