Regiospecific synthesis of 2,6-bis-indazol-1-ylpyridines from 2,6-bis-hydrazinopyridine
作者:Nathan C. Duncan、Charles M. Garner
DOI:10.1016/j.tetlet.2011.07.081
日期:2011.10
The synthesis of 2,6-bis-hydrazonopyridines from 2,6-bis-hydrazinopyridine and the conversion of these bis-hydrazones into 2,6-bis-indazol-1-ylpyridines were studied. The conversion of bis-haloarylhydrazones to bis-indazoles was systematically optimized using iron and copper mediated reactions and various bases and ligands. By varying solvent, base, transition metal, and ligand, a novel regiospecific
研究了由2,6-双-肼基吡啶合成2,6-双-肼基吡啶和将这些双-基转化为2,6-双-吲哚-1-基吡啶。使用铁和铜介导的反应以及各种碱和配体系统地优化了双卤代芳基hydr向双吲唑的转化。通过改变溶剂,碱,过渡金属和配体,开发了向2,6-双-吲哚-1-基吡啶类配体的新的区域特异性途径。