The aryneinsertion into “S═O” bond has been validated recently. This technology is elusively applied to the synthesis of thioethers. In contrast to the reported cases, the reaction described furnished o-aryloxy triarylsulfonium salts, in lieu of thioethers, in good to excellent yields. The reaction is also featured by its exquisite regioselectivity, broad substrate scope, and mild conditions (25 °C)
A CuI promoted sulfenylation of organozinc reagents with arylsulfonyl chlorides/PPh3 has been explored. This reaction proceeded smoothly through an alkyl/aryl radical (generated from organometallics) under mild conditions and produced the desired sulfide products in excellent yields.
Diarylation of chalcogen elements using arylboronic acids via copper- or palladium-catalyzed oxidative coupling
作者:Nobukazu Taniguchi
DOI:10.1016/j.tet.2016.08.012
日期:2016.9
selenium and tellurium were achieved using arylboronicacids in air. A copper-catalyzed reaction of sulfur or selenium efficiently yielded numerous symmetrical diaryl sulfides or selenides in the presence of NH4BF4. However, the diarylation of tellurium was not possible using this method, and required a palladium catalyst in the presence of KI and air for the reaction to proceed.
transition metal catalysis, photoinduced catalysis has emerged as a versatile and sustainable way to achieve carbon–heteroatom bond formation. This work discloses a visible-light-induced reaction for the formation of a C–S bond from aryl halides and inorganic sulfuration agents via electron donor–acceptor (EDA) complex photocatalysis. Divergent formations of organic sulfide and disulfide have been demonstrated