Cyanopyridinethione derivatives 3a,b were reacted with active halogen containing compounds in basic medium to afford the corresponding thienopyridine derivatives 4a,b, 5a,b, 6a,b. 3-Aminothieno[2,3-b]pyridine-2-carbonitrile 4a was converted to several pyridothienopyrimidin derivatives 10-15. Aminothienopyridine carbohydrazide 9 was converted to several triazolyl-, oxadiazolyl- and pyrazolyl- derivatives. Finally, compound 9 reacted with cyanoguanidine followed by NaOH to give aminothienopyridin-1,2,4-triazolyl-guanidine 26 which reacted with aromatic aldehydes and aliphatic acids to give the corresponding triazolo[1,5-a][1,3,5]triazin-2-yl)thieno[2,3-b]pyridin-3-amine derivatives 27a,b and 28a,b respectively.
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[Hussein F. Zohdi, Nora M. Rateb and Tamer A. Khlosy (2014); Synthesis, reaction and antimicrobial activity of some pyridinethione derivatives containing benzimidazole nucleus Int. J. of Adv. Res. 2 (4). 0] (ISSN 2320-5407). www.journalijar.com
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