Construction of pyrimido [5, 4??e]??as??triazine, purine, v??triazolo??[4, 5??d] pyrimidine and pyrazolo [3, 4??d] pyrimidine ring systems from 5??arylazo??6??arylidenehydrazino …

S Nishigaki, M Ichiba, K Fukami…

Index: Nishigaki; Ichiba; Fukami; Senga Journal of Heterocyclic Chemistry, 1982 , vol. 19, # 4 p. 769 - 773

Full Text: HTML

Citation Number: 11

Abstract

Abstract Reaction of 5-arylazo-6-arylidenehydrazino-1, 3-dimethyluracils (II), prepared by the treatment of 6-aryl-idenehydrazino-1, 3-dimethyluracils (I) with diazotized arylamines, with dimethylformamide dimethylacetal resulted in the formation of pyrimido [5, 4-e]-as- triazine (V) system, while the thermolysis of II resulted in the formation of purine (X), v- triazolo [4, 5-d] pyrimidine (XII), and pyrazolo [3, 4-d] pyrimidine (XIV, XIX) systems in lieu ...