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Miyaura Borylation and One‐Pot Two‐Step Homocoupling of Aryl Chlorides and Bromides under Solvent‐Free Conditions
Authors:Pavel B. Dzhevakov  Maxim A. Topchiy  Daria A. Zharkova  Oleg S. Morozov  Andrey F. Asachenko  Mikhail S. Nechaev
Abstract:Solvent‐free protocols for Miyaura borylation and the one‐pot, two‐step homocoupling of aryl halides are reported for the first time. Bis(dibenzylideneacetone)palladium(0) [Pd(dba)2] is an optimal source of palladium for Miyaura borylation, while for one‐pot two‐step homocoupling palladium(II) acetate [Pd(OAc)2] gives highest yields. Aryl bromides are coupled most efficiently using the DPEphos ligand. Chlorides are coupled using XPhos. The developed protocols are robust, versatile and easily reproducible on a large scale.
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Keywords:cross‐coupling reactions  homocoupling  Miyaura borylation  palladium  solvent‐free reactions
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