Heterogeneous copper-catalyzed synthesis of diaryl sulfones

Abstract

A carbon-supported copper nanoparticle (Cu-NP) with high catalytic activity for the synthesis of diaryl sulfones is reported.

Visible Light Induced Aerobic Coupling of Arylboronic Acids Promoted by Hydrazone

“…As for those lower yields in Table 2, there are two major side reactions: deboronation/oxidation of arylboronic acids to simple arene/phenol via organometallic intermediates [19] . Deboronation was also observed in our recent work in which naphthalen‐2‐ylboronic acid was found to be coverted to naphthalene in the presence of copper catalyst [20] . For current reaction, deboronation was dominant pathway for 1 h and 1 r , as simple arenes were isolated in the reactions.…”

“…[19] Deboronation was also observed in our recent work in which naphthalen-2-ylboronic acid was found to be coverted to naphthalene in the presence of copper catalyst. [20] For current reaction, deboronation was dominant pathway for 1 h and 1 r, as simple arenes were isolated in the reactions. It is also found that 1 m did not work for the reaction because it is not soluble in common solvents.…”

A Copper‐catalysed Facile Synthesis of Highly Functionalized Aryl Sulphones in Guanidinium IL(GIL) aided with Ultrasound

“…Simultaneously, Pandey et al., [21] have reported another approach employing copper acetate hydrate for the cross‐coupling reaction between sulphonyl hydrazides and aryltriazenes providing unsymmetrical sulphones and employed Brønsted acidic ionic liquid as promoter under ambient conditions. Recently, Gong and co‐workers [22] reported a heterogeneous copper‐catalysed synthesis of diaryl sulphones, employing a carbon‐supported copper nanoparticle (Cu‐NP) with high catalytic activity. Despite of the variety of methods known for synthesis of sulphone, the majority of these approaches suffer from or the other limitations such as exorbitant materials, poor substrate scope, longer reaction span, and harsh conditions.…”