Journal of the Chinese Chemical Society p. 91 - 96 (1999)
Update date:2022-08-05
Topics:
Ho, Yuh-Wen
The reaction of 3-amino-4,6-dimethyl-2-thieno[2,3-b]pyridine carbohydrazide (1) with appropriate chalcones 2a-2d in the presence of acid catalyst produced the corresponding 3-amino-2-[(3,5-disubstituted-pyrazolin-1-yl)carbonyl]-4,6-dimethylthieno[2,3-b] pyridines 3a-3d. 3-Amino-2-[(3-substituted-pyrazolin-l-yl)carbonyl]-4,6-dimethylthieno[2,3-b] pyridines 7a, 7b were also obtained by the cyclization reaction of carbohydrazide 1 with Mannich base derivatives 6a, 6b under basic condition.
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