Synthesis of some new bipyridines,thieno[2,3‐b]pyridines,and pyrazolo[3,4‐b]pyridines |
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| Authors: | Mahmoud A Mohamed |
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| Institution: | Textile Department, Faculty of Industrial Education, Beni‐Suef University, Beni‐Suef, Egypt |
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| Abstract: | Cyclocondensation of cyanoacetamide and cyanothioacetamide with sodium salt of 3‐hydroxy‐1‐(pyridin‐3‐yl)prop‐2‐en‐1‐one gave 6‐oxo‐2,3′]bipyridine 5a and 6‐thioxo‐2,3′]bipyridine 5b derivatives, respectively. Compound 5b upon treatment with different methylenes 8 gave thieno2,3‐b]pyridines 10 . Treatment of 5b with iodomethane gave bipyridine derivative 7 , which cyclocondensed with hydrazines 11 to give pyrazolo3,4‐b]pyridines 13 . J. Heterocyclic Chem., (2012). |
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