Regioselective Synthesis of 2-Amino-5-(or 3-)arylazo-Substituted Pyridines and Pyrazines from Pyridinium<i>N</i>-Aminides
作者:Elena Gala、M. José Reyes、Julio Alvarez-Builla、M. Luisa Izquierdo
DOI:10.1002/ejoc.201600059
日期:2016.4
Differently modified 2-aminopyridines and pyrazines bearing an arylazo group at the 3- or 5-position have been generated from pyridinium N-aminides in a regioselective fashion. The detailed chemistry starts with attack of the N-aminide on a diazonium salt, to form the arylazo derivative. N-alkylation on the exocyclic nitrogen and reduction to break the N–N bond then affords the final compounds, as
已经以区域选择性方式从吡啶鎓 N-胺化物生成了在 3 位或 5 位带有芳基偶氮基的不同修饰的 2-氨基吡啶和吡嗪。详细的化学反应从 N-胺对重氮盐的攻击开始,形成芳基偶氮衍生物。环外氮上的 N-烷基化和还原以破坏 N-N 键,然后提供最终化合物,作为吡啶鎓 N-胺化物广泛合成用途的延伸。