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A new oxygen bridged [Cu‐O‐Ba] bimetallic catalyst is synthesized. The novel catalyst is used for Csp2‐O cross‐coupling reactions of phenols with haloarenes. Iodo‐, bromo‐, and unactivated chloro‐arenes could be coupled with aryl phenols efficiently in high yield. Moreover, functional groups were well tolerated using this protocol. The catalyst is Eco‐friendly, air stable, recyclable and efficient. [ABSTRACT FROM AUTHOR]

Formation of carbon‐selenium bond by Csp2‐Se cross‐coupling using diaryldiselenides and arylhalides are very few in literature. Herein we report CuSeO3.2H2O as an efficient catalyst for direct Csp2‐Se cross‐coupling of diaryldiselenides with aryl iodides, bromides and aryl boronic acids. The reaction is performed at low temperature (70 °C) in tert‐butanol solvent in absence of ligand. Arylboronic acids are more reactive than aryliodides and bromides. [ABSTRACT FROM AUTHOR]

In this work, an oxo‐bridged bimetallic CuMoO4 catalyst for Csp2−Se cross‐coupling of diaryldiselenides with aryl‐halides is reported. The current discovery is noteworthy, as the catalyst is eco‐friendly, easily accessible, air‐stable, and recyclable. The methodology exhibits broad substrate scope and the catalytic system tolerates common functional groups. The protocol uses aryl iodide and bromides as electrophile instead of boronic acids. This is the first example of using an oxo‐ bridged copper based bimetallic catalyst for Csp2−Se cross‐coupling reactions in water. C−Cl bond remains intact during reaction. [ABSTRACT FROM AUTHOR]