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The Syntheses of 2-Methyl-3-(p-tolylazo)-pyrimido[1,2-a]benzimidazole-4-one, 7-Hydroxy-5-methyl-6-(p-tolylazo)-[1,2,4]triazolo[1,5-a]pyrimidine, 2-Methylpyrazolo[1,5-a]pyridine-5,7(4H,6H)-dione and Arylazothiopyrimidines

Saoud A. Metwally, Mohmed Abbas Metwally, Mamoun Y. Yousif, Andel-Kader M. Ismaiel, H. A. Etman

Heterocycles · 1985 · 13 citations · 0 references

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Abstract

b u t y r a t e ( 2 ) i n a b s o l u t e EtOH ( m o l a r r a t i o ) Cr a f f o r d e d 2-methyl-3-(p-to1ylazo)-pyrimido [I ,2-n]benzirnidazole-4o n e (4).