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.
Synthesis and Antiprotozoal Activity of Dicationic <i>m</i>-Terphenyl and 1,3-Dipyridylbenzene Derivatives
作者:Donald A. Patrick、Mohamed A. Ismail、Reem K. Arafa、Tanja Wenzler、Xiaohua Zhu、Trupti Pandharkar、Susan Kilgore Jones、Karl A. Werbovetz、Reto Brun、David W. Boykin、Richard R. Tidwell
DOI:10.1021/jm400508e
日期:2013.7.11
Bis-pyridylimidamide derivative 31 was 25 times more potent than benznidazole against T. cruzi and slightly more potent than amphotericin B against L. amazonensis. Terphenyldiamidine 1 and dipyridylbenzene analogues 23 and 25 each cured 4/4 mice infected with T. b. rhodesiense STIB900 with four daily 5 mg/kg intraperitoneal doses, as well as with single doses of ≤10 mg/kg. Derivatives 5 and 28 (prodrugs