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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]

Transition metal catalysed formation of Csp2‐S bond through cross‐coupling reaction stands important and powerful tools in synthetic organic chemistry. The reaction constitutes an important strategy for the synthesis of thioethers that possess diverse biological activities in medicine and agriculture. Nonetheless, maintaining reaction temperature during Csp2‐S cross‐coupling reaction decides fate of desired product along with possibility of by‐product and disulfides. The economy of process, safety and environmental issue demands thioether synthesis at mild condition and room temperature. Only very few reactions were successful under mild condition using Pd, Cu, Ni, Ni−Ir and Ir catalyst. The current prospective summarizes the best protocols used for efficient Csp2‐S cross‐coupling reactions by transition metal catalyst under mild condition. [ABSTRACT FROM AUTHOR]