Highly efficient and reusable polystyrene‐supported copper(II) catalytic system for S‐arylation of potassium thiocyanate by aryl halides in water

Abstract

An inexpensive, efficient and environmentally friendly copper(II) catalyst supported on polystyrene was successfully synthesized and used as a heterogeneous catalyst for S‐arylation of potassium thiocyanate by aryl halides. Also this catalyst could be recovered and reused several times without any noticeable decrease in its catalytic activity. Copyright © 2016 John Wiley & Sons, Ltd.

Step‐by‐step synthesis of copper(I) complex supported on platinum nanoparticle‐decorated mesoporous silica hollow spheres and its remarkable catalytic performance in Sonogashira coupling reaction

“…Because of the need for very large quantities of the palladium catalyst, which is not economically viable, 13,14 many efforts have been focused on the development of heterogeneous catalysts to overcome the drawbacks associated with the recovery of the expensive catalyst in large‐scale industrial production 15–21 . Furthermore, to increase the specific surface area and reduce the content of active components, constructing a new heterogeneous catalyst on an appropriate support has been suggested 21–25 . The hollow mesoporous silica with unique advantages such as low density, high specific surface area, large pore volume, and mechanical stability is a suitable substrate for increasing the selectivity and improving catalyst stability 26–28 .…”

Copper nanoparticles supported on 2‐methoxy‐1‐phenylethanone‐functionalized MCM‐41: An efficient and recyclable catalyst for one‐pot three‐component C–S coupling reaction of aryl halides with benzyl bromide and thiourea

“…In continuation of our recent investigations for application of green heterogeneous catalysts, herein we developed an eco‐friendly and recyclable 2‐methoxy‐1‐phenylethanone‐functionalized MCM‐41 supported Cu (II) complex for one‐pot three‐component C–S coupling reactions in the presence of KOH in water at 100°C (Scheme ).…”

“…The modification of MCM-41 by grafting onto various ligands provides an efficient method to interpolation catalytically active metals. [29][30][31][32] In continuation of our recent investigations for application of green heterogeneous catalysts, [20,23,24,33] herein we developed an eco-friendly and recyclable 2-methoxy-1-phenylethanone-functionalized MCM-41 supported Cu (II) complex for one-pot three-component C-S coupling reactions in the presence of KOH in water at 100°C (Scheme 1).…”

Copper nanoparticles supported on polyaniline‐functionalized multiwall carbon nanotubes: An efficient and recyclable catalyst for synthesis of unsymmetric sulfides using potassium ethyl xanthogenate in water

“…Recently, thiourea, potassium thiocyanate, thiolates, carbon disulfide, sulfur powder, thioimide, sodium thiosulfate and ethyl xanthogenate have been reported as sulfur sources in C─S bond formation. However, these reactions are often conducted in dimethylformamide (DMF) at a high temperature.…”

“…However, to the best of our knowledge, there is no report in the literature describing polyaniline‐functionalized MWCNT‐supported copper(II) nanoparticles (Cu(II)‐PANi‐MWCNT) as a nanocatalyst for the synthesis of unsymmetric sulfides from potassium thioacetate with aryl, alkyl and benzyl halides in water. In continuation of our interest in the development of new catalysts for C─S bond formation reactions, we report synthesis of Cu(II)‐PANi‐MWCNT (Scheme ) as a new, effective, recyclable and heterogeneous nanocatalyst for the synthesis of unsymmetric thioethers in water. This catalyst can be recovered and recycled for up to six consecutive runs without important loss in its efficiency.…”