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.
所述膦亚胺1-氨基-6-(triphenylphosphoranylideneamino)-2-氧代-4-苯基-1,2-二氢-吡啶-3,5-二腈2由1,6-二氨基吡啶制备1层发生反应以heterocumulenes如二硫化物和碳苯异氰酸酯,与酰氯,酸酐和卤代酮一起,以一锅的氮杂-维蒂希/杂环封闭法直接得到标题化合物,收率很高。