A switchable and benign protocol for chemoselectivesynthesis of sulfoxides and α-alkoxy-β-ketothioethers has been developed. It was determined that various thiophenols and alkenes/alkynes are compatible to realize the target compounds from a medium to a high yield by regulating the reaction temperature. In particular, methanol not only served as a solvent but also participated in the reaction process
Solvent-Enabled Radical Selectivities: Controlled Syntheses of Sulfoxides and Sulfides
作者:Huamin Wang、Qingquan Lu、Chaohang Qian、Chao Liu、Wei Liu、Kai Chen、Aiwen Lei
DOI:10.1002/anie.201508729
日期:2016.1.18
Controllingselectivity is of central importance to radical chemistry. However, the highly reactive and unstable radical intermediates make this task especially challenging. Herein, a strategy for taming radical redox reactions has been developed, in which solvent‐bonding can alter the reactivity of the generated radical intermediates and thereby drastically alter the reaction selectivity at room temperature
Photoredox-Mediated Synthesis of Functionalized Sulfoxides from Terminal Alkynes
作者:Jaswant Kumar、Ajaz Ahmad、Masood Ahmad Rizvi、Majid Ahmed Ganie、Chhavi Khajuria、Bhahwal Ali Shah
DOI:10.1021/acs.orglett.0c02055
日期:2020.7.17
A photoredox-mediated protocol for the synthesis of α-alkoxy-β-ketosulfoxides and α,β-dialkoxysulfoxides using alkynes, thiol, and alcohols is reported. This work presents a rare single-step synthesis of α-substituted sulfoxides, involving tandem introduction of a thiol and alcohol as a key enabling advancement. Furthermore, the method can be easily employed to access vinyl sulfoxides and β-ketosulfoxides