A General Synthesis of Bis(<i>o</i>-azaheteroaryl)methane Derivatives from<i>N</i>-Oxides of Azines and Azoles
作者:Magdalena Szpunar、Rafał Loska
DOI:10.1002/ejoc.201500072
日期:2015.4
A general method of preparation of derivatives of bis(o-azaheteroaryl)methanes from aromatic N-oxides is reported, the key step of which is a 1,3-dipolar cycloaddition between N-oxides of azines or azoles and in situ generated terminal difluoroalkenes containing an o-azaheteroaryl substituent at the double bond. Selected products were applied for the preparation of two novel unsymmetrical analogues