Reactivity of N-protected 5-(2-bromophenyl)tetrazoles in palladium-catalyzed direct arylation of heteroarenes or fluorobenzenes
作者:Sabah Chikhi、Safia Djebbar、Jean-François Soulé、Henri Doucet
DOI:10.1016/j.jorganchem.2016.12.026
日期:2017.3
biphenyltetrazole derivatives is disclosed. By using 2 mol% of an air-stable diphosphine-palladium catalyst [PdCl(C3H5)(dppb)], potassium pivalate as base and dimethylacetamide as solvent, a wide range of heteroarenes (e.g., thiazoles, (benzo)thiophenes, furans, pyrroles, and imidazo[1,2-a]pyridine) and polyfluorobenzenes was easily coupled with N-protected (2-bromophenyl)tetrazoles in high yields.
公开了一种允许一步合成(2-杂芳基苯基)四唑和氟化联苯四唑衍生物的新途径。通过使用2 mol%的空气稳定的二膦-钯催化剂[PdCl(C 3 H 5)(dppb)],新戊酸钾作为碱和二甲基乙酰胺作为溶剂,可以使用多种杂芳烃(例如噻唑,(苯并)噻吩,呋喃,吡咯和咪唑并[1,2- a ]吡啶)和多氟苯很容易与N保护的(2-溴苯基)四唑偶合。