Pages that link to N-(Pyrazol-5-yl) cyanoacetamide in heterocyclic synthesis: synthesis of novel N-(pyrazol-5-yl) pyridine-3, 5-dicarbonitrile, pyrazolo [1, 5-a]-pyrido [3, 2-e] pyrimidine-7-carbonitrile and pyrazolo [4, 3-e] pyrido [1, 2-a]-pyrimidine-6, 8