Fused pyridines by a tandem aza-wittig / heterocyclization strategy: Synthesis of 1,2,4-triazolo[1,5-<i>a</i>]pyridines and pyrido[1,2-<i>b</i>][1,2,4]triazines
作者:Magda A. Barsy、Eman A. El Rady、Fawi M. Abd El Latif
DOI:10.1002/jhet.5570450322
日期:2008.5
6-diaminopyridine 1 reacts with heterocumulenes such as carbon disulfide and phenylisocyanate, and with acid chlorides, acid anhydrides and haloketones to give directly the title compounds in an one-pot aza-Wittig / heterocyclic-ring closure process with good yields.