CuS/Fe: a novel and highly efficient catalyst system for coupling reaction of aryl halides with diaryl diselenides

The CuS catalyzed coupling reactions of aryl halides and diaryl diselenides were accelerated by the addition of Fe powder in only 3–12 h with good to excellent yields. SEM–EDX indicated that the in situ iron oxides as support against catalyst agglomeration accelerated the reaction. This catalyst system was also demonstrated recyclable without significant loss of catalytic activity.