First Synthesis of β-Keto Sulfoxides by a Palladium-Catalyzed Carbonylative Suzuki Reaction
摘要:
An unprecedented palladium-catalyzed three-component cross-coupling reaction between alpha-bromo sulfoxide, carbon monoxide, and aromatic boronic acids provides a new and efficient approach to the synthesis of beta-ketosulfoxides. The reaction takes place under mild conditions with a wide range of variously substituted aryl and heteroaryl boronic acids. The carbonylative cross-coupling reaction is strongly favored over competing direct cross-coupling and homocoupling processes, except with boronic acids carrying strong electron-withdrawing substituents.
Visible light organophotoredox catalysis: a general approach to β-keto sulfoxidation of alkenes
作者:Twinkle Keshari、Vinod K. Yadav、Vishnu P. Srivastava、Lal Dhar S. Yadav
DOI:10.1039/c4gc00857j
日期:——
A mild, simple, efficient and metal-free approach to β-keto sulfoxides utilising eosin Y as an organophotoredox catalyst has been developed. This general protocol offers a direct and rapid difunctionalization of alkenes using thiophenols and atmospheric oxygen at room temperature in a one-pot procedure. The utilisation of visiblelight and air (O2) as inexpensive, readily available, non-toxic and eco-sustainable