Rhodium-Catalyzed Enamine Homologation of Sulfides with Triazoles as Carbene Precursor
作者:Fang Li、Chao Pei、Rene M. Koenigs
DOI:10.1021/acs.orglett.0c02330
日期:2020.9.4
We report on Rh(II)-catalyzed enamine homologation reactions of triazoles with cyclopropylmethyl sulfides. This reaction proceeds via Dimroth rearrangement of triazoles followed by rhodium-catalyzed ylide formation. This ylide, however, does not undergo classic rearrangement reactions. Instead, it undergoes a selective, intramolecular alkylation reaction to yield cyclopropylmethyl-substituted enamides
Synthesis and Functionalization of Thiophosphonium Salts: A Divergent Approach to Access Thioether, Thioester, and Dithioester Derivatives
作者:Gurupada Hazra、Ahmad Masarwa
DOI:10.1021/acs.orglett.3c02422
日期:2023.9.1
practical method for efficiently obtaining a diverse range of thiophosphonium salts. This method involves the direct coupling of commercially available thiols and aldehydes with Ph3P and TfOH. The setup is simple and carried out in a metal-free manner. The synthetic utility of these salts is demonstrated through various examples of C–P bond functionalizations, enabling the synthesis of thioether, deuterated