A simple and novel approach has been developed for the synthesis of sulfonamides from N-hydroxy sulfonamide. Notably, the iodine-tert-butyl hydroperoxide (TBHP) system efficiently promoted the sulfonylation reactions of N-hydroxy sulfonamides and amines via the oxidative cleavage of an S–N bond. A variety of aryl sulfonamides were prepared in moderate to good yields using readily available starting
A mild and efficient procedure has been developed for the monosulfonylation of various amines using mesyl or tosyl chlorides in water at room temperature to afford the corresponding sulfonamides in high yields.
Modular photoredox system with extreme reduction potentials based on pyridine catalysis
作者:Lutao Bai、Lei Jiao
DOI:10.1016/j.chempr.2023.06.023
日期:2023.11
exhibit potent reduction abilities required for reducing inert substrates, and more new systems with extreme reduction potentials are highly desirable. Notably, developing a new photoredox system usually requires iterative work on molecular design and synthesis. In this work, we present a conceptually distinct modular photoredox system, which features the in situ formation of a photoredox-active species