Intramolecular Chalcogenylation of Isooxazolines Mediated by PhICl2 and Diorganyl Disulfides or Diselenides
作者:Fengxia Sun、Yunfei Du、Dongke Zhang、Jingran Zhang、Xiaoxian Li、Zhenyang Yu、Yadong Li
DOI:10.1055/s-0040-1719833
日期:2022.1
Reactive organosulfenyl chlorides (ArSCl) or selenenyl chlorides (ArSeCl), generated in situ from the reaction of PhICl2 with diorganyl disulfides or diselenides, enable the intramolecular oxidative cyclization/chalcogenylation of β,γ-unsaturated oximes, leading to the formation of a series of chalcogenylated isooxazolines in good to excellent yield.
Abstract A novel and convenient copper(I)-catalyzed thiolation of C–H bonds of pyrroles and indoles is developed for the synthesis of sulfenyl pyrroles and indoles. Dual C–H thiolation reactions are observed for pyrroles. A wide range of pyrroles and indoles undergo the C–H thiolation smoothly with various disulfides and diselenides to generate the corresponding heteroaryl thioethers in moderate to
Various diarylsulfides, including heteroaryl- and nitrogen-containing sulfides, have been efficiently prepared by rhodium-catalyzed odorless deborylative arylthiolation of organoborons with S-aryl thiosulfonates. The ready availability of starting materials and further transformation of sulfides have rendered a diverse range of organosulfur compounds easily accessible.
A mild and odorless copper-catalyzed thiolation of terminal alkynes with thiosulfonates is described. The broad substrate scope provides convenient access to a wide variety of sulfur-containing heterocycles. In particular, divergent benzoheteroles are efficiently prepared in a simple manner by thiolation of ethynylbenzenes bearing ortho-nucleophilic functional groups followed by iodocyclization.
of arylboronic acid esters with thiosulfonates has been achieved under mild and odorless conditions using a copper catalyst. The use of TMEDA and cesium fluoride as the ligand and base, respectively, dramatically facilitated the desired transformation. The method exhibited a broad substrate scope, which allowed for the expeditious synthesis of diverse aryl sulfides from easily available starting materials