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Short Paper | Regular issue | Vol 94, No. 11, 2017, pp.2132-2140
Published online, 6th October, 2017
DOI: 10.3987/COM-17-13812
Synthesis of Dendrimer-Type Viologen and Its Use in Pd-Mediated Homocoupling of Aryl Halides

Manabu Kuroboshi,* Atsuki Kojima, and Hideo Tanaka

*Division of Chemsitry and Biochemistry, Graduate School of Natural Science and Technology, Okayama University, 3-1-1 Tsushima-naka, Okayama 700-8530, Japan

Abstract

Dendrimer-type viologen (V2+.D.) was prepared from mesitylene and 4,4’-bipyridyl. Electroreduction of V2+.D. gave the corresponding quinoid (V0.D.), which promoted Pd-catalyzed homocoupling of aryl bromides Ar-Br to give the corresponding biaryls Ar-Ar in moderate to good yields.