Pyridinium N-2′-pyridylaminide: synthesis of 3-aryl-2-aminopyridines through an intramolecular radical process
作者:Aránzazu Sánchez、Araceli Núñez、Julio Alvarez-Builla、Carolina Burgos
DOI:10.1016/j.tet.2004.09.099
日期:2004.12
Tris(trimethylsilyl)silane (TTMSS) and azobisisobutironitrile (AIBN) promote the intramolecular heteroarylation of arenesulfonamides with pyridyl radicals under thermal conditions. The arenesulfonamides are easily prepared from pyridinium N-2′-pyridylaminide. The heteroarylation process involves pyridyl radical cyclization and ipso substitution.
三(三甲基甲硅烷基)硅烷(TTMSS)和偶氮二异丁腈(AIBN)在热条件下促进芳族磺酰胺与吡啶基的分子内杂芳基化。芳族磺酰胺很容易从吡啶鎓N -2'-吡啶酰胺制备。杂芳基化过程涉及吡啶基自由基环化和ipso取代。