Tridentate hydroxy-functionalised MCM-41-immobilised copper(I) complex as an efficient and recyclable catalyst for coupling of aryl iodides with thiols

摘要

The C-S coupling reaction of aryl iodides with thiols was achieved at 110 degrees C in DMF/dioxane (V/V, 1:9) in the presence of a tridentate hydroxy-functionalised MCM-41-immobilised copper(I) complex [MCM-41-3OH-CuI] with Cs2CO3 as base to afford a variety of diaryl sulfides in good to excellent yields. The MCM-41-3OH-CuI catalyst can be easily recovered by a simple filtration and reused for at least six times without significant loss of activity.