Abstract
Aryl selenium, tellurium, arsenic and antimony compounds represent the privileged structural scaffolds in synthetic chemistry for the construction of complex molecules from simple substrates. Transition-metal-catalyzed cross-coupling reactions provide a powerful synthetic tool for the construction of C-Se, C-Te, C-As and C-Sb bonds with functional group diversities. These reactions generally utilize aryl/vinyl halides and arylboronic acids as the aryl/vinyl coupling partner. Recently, considerable efforts have been made on the use of (hetero)arenes as the aryl source in place of the aryl halides (boronic acids) via the CH functionalization for the regioselective C-Se and C-Te bond formations using directing group in the presence of Pd, Cu, Rh and Ru-based catalysis. Few studies are focused on the use of recyclable catalysts and alcohol/ water/ ionic liquid as the reaction medium for the C-Se and C-Te cross-couplings, which are important developments in view of the demand for the sustainable organic synthesis.
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