Refine Search

New Search

Advanced search

Result: 1

(searched for: (10.5155/eurjchem.4.2.180-184.767))
Save to Scifeed
Page of 1
Articles per Page
by
Show export options
  Select all
Sciprofile linkSobhi M. Gomha, Mohamed Gomaa Badrey
European Journal of Chemistry, Volume 4, pp 180-184; doi:10.5155/eurjchem.4.2.180-184.767

Abstract:
The reaction between 2-mercapto-3H-chromeno[4,3-d]pyrimidine-4,5-dione (1) or its 2-methylthio derivative (7) with hydrazonoyl halides (2) in dioxane under ultrasound irradiation in the presence of chitosan yielded chromeno[4,3-d][1,2,4]triazolo[4,3-a]pyrimidine derivatives (5a-r). On the other hand, the reaction of compound 1 with the appropriate active chloromethylene compounds (9b, h and m) followed by coupling the products with benzenediazonium chloride afforded the azo coupling products which converted in situ to compound 5. The reaction mechanism was proposed and the structure of the newly synthesized compounds were established on the basis of spectral data (Mass, IR, 1H and 13C NMR) and elemental analyses.
Page of 1
Articles per Page
by
Show export options
  Select all
Back to Top Top