Single-flask preparation of polyazatriaryl ligands by sequential borylation/Suzuki–Miyaura coupling
作者:Bertoldo Avitia、Eric MacIntosh、Samuel Muhia、Eric Kelson
DOI:10.1016/j.tetlet.2011.01.136
日期:2011.4
We report a convenient single-flask methodology for the preparation of polyazatriaryl products with relevance to luminescence, catalysis, and pharmacology. The diborylation of 1,3-dibromobenzenes and double Suzuki-Miyaura coupling produces 1,3-diheteroarylbenzenes. Similarly, borylation of heteroaryl halides and double coupling to 2,6-clichloropyridine produces 2,6-diheteroarylpyridines. This methodology appears general in producing challenging polyheteroaryl targets as long as the boronic esters have no ortho heteroatoms and coupling avoids adjacent oxygens. (C) 2011 Elsevier Ltd. All rights reserved.