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ChemInform Abstract: Synthesis of Condensed Tricyclic Pyrazolo(3,4-b)thieno(2,3-d)pyridine and Related Isostere Derivatives.

✍ Scribed by A. S. DE CARVALHO; C. A. M. FRAGA; E. J. BARREIRO


Book ID
112038002
Publisher
John Wiley and Sons
Year
2010
Weight
29 KB
Volume
27
Category
Article
ISSN
0931-7597

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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‐[2,3β€²]bipyridine **5a** and 6‐thioxo‐[2,3β€²]bipyridine **5b** derivatives, respectively. Compound **5b** upon treatment with different methylenes **8** gave