Anti-Alzheimer and Anti-COX-2 Activities of the Newly Synthesized 2,3′-Bipyridine Derivatives (II)

Abstract 3-Amino-4-aryl-6-pyridin-3-ylthieno[2,3-b]pyridine-2-carbohydrazides 3a,b were used as the starting materials in the present study. Our targets here were represented by the synthesis of several 3-amino-N′-4-arylmethylenes 5a,b, N-formamides 8a,b, ethyl imidoformate 10b, N,N-dimethyl-N′-imidoformamides 12a,b, N-acetyl-N-acetamides 14a,b, 1,3,4-oxadiazole-2-thiol 16a,b, pyrazolothienopyridines 20a,b, 2-[(3,5-dimethyl-1H-pyrazol-1-yl)carbonyl]-4-aryl-6-pyridin-3-ylthieno[2,3-b]pyridin-3-amines 22a,b, 2-carbonyl-5-methyl-2,4-dihydro-3H-pyrazol-3-ones 24a,b, and 2-carbonyl-pyrazolidine-3,5-diones 26a,b. The newly synthesized heterocyclic compounds were tested as anti-Alzheimer and anti-COX-2 agents, and their structures were elucidated by considering the data of IR, 1H NMR, mass spectra, and elemental analyses. Supplemental materials are available for this article. Go to the publisher's online edition of Phosphorus, Sulfur, and Silicon and the Related Elements to view the free supplemental file. Keywords: N-Acetyl-N-acetamidesethyl imidoformates1,3,4-oxadiazole-2-thiol3H-pyrazol-3-onespyrazolidine-3,5-dionespyrazolothieno-pyridines Acknowledgments The authors thank the Cairo University, Faculty of Science, Chemistry Department, for the financial support in this research.