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Convenient synthesis and reactions of some 7,9-dimethylthieno
[2,3‑b:4,5-b' ]dipyridines

Research Authors
Adel M. Kamal El-Deana, Gehan Ahmed Ali Mekyb, Abo Bakr Abdel-Hadi Ahmedc and
Rasha Hassan Ahmed
Research Abstract

3-Amino-4,6-dimethylthieno[2,3-b]pyridine-2-carboxaldehyde was prepared and from it various functionalised
thieno[2,3-b; 4,5-b']dipyridines were synthesised, using the Friedländer and related reactions. Ethyl 2,7,9-
trimethylthieno[2,3-b; 4,5-b']dipyridine-3-carboxylate was transformed into a variety of thieno[2,3-b; 4,5-b']dipyridine
systems with heterocyclic rings attached at C-3 or fused at C2–C3.

Research Department
Research Journal
JOURNAL OF CHEMICAL RESEARCH
Research Publisher
Science Reviews 2000 Ltd
Research Rank
1
Research Website
http://www.sciencereviews2000.co.uk/view/journal/journal-of-chemical-research
Research Year
2009
Research Pages
649–652