Etude de l'isomerie de n-(oxo-2-(1h)-pyridyl-6)aminomethylene cyanacetates, et de leur cyclisation en pyrido[1,2-a]pyrimidines
作者:Francis Pochat
DOI:10.1016/s0040-4020(01)87319-1
日期:1986.1
The condensation of substituted 6-amino-2-(1H)-pyridones with ethylethoxymethylene cyanoacetate gives rise not only to the two corresponding olefines, as expected, but also to a third tautomeric fused form. The equilibrium between these 3 forms in solution is studied by NMR. These compounds are excellent precursors for the synthesis of pyrido [1,2-a] pyrimidines.
取代的6-氨基-2-(1H)-吡啶酮与乙氧基亚甲基氰基乙酸酯的缩合不仅产生了预期的两种相应的烯烃,而且还产生了第三种互变异构的稠合形式。通过NMR研究溶液中这三种形式之间的平衡。这些化合物是用于合成吡啶并[1,2-a]嘧啶的极好的前体。