Quinoxaline-Based Cyclo(oligophenylenes)

J Org Chem. 2015 Feb 20;80(4):2425-30. doi: 10.1021/jo502771a. Epub 2015 Jan 30.

Abstract

A series of fully conjugated quinoxaline-based oligophenylene macrocycles is synthesized by Ni(0)-mediated Yamamoto-type diaryl homocoupling of (fluorinated) 2,3-bis(4'-bromophenyl)quinoxaline precursors. Cyclotrimers and cyclotetramers are obtained as the dominant reaction products. The cyclooligomers are fully characterized, including single-crystal X-ray structures, and their optoelectronic properties are analyzed with respect to possible applications in host-guest chemistry and organic electronics.