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Journal of Chemistry
Volume 2013, Article ID 234074, 7 pages
Research Article

Synthesis, Antibacterial and Antioxidant Evaluation of Novel 1-(5,7-Dichloro-1,3-benzoxazol-2-yl)-1H-pyrazolo[3,4-b]quinoline Derivatives

1Department of Chemistry, Sahyadri Science College, Shimoga 577 203, India
2Department of PG Studies and Research in Industrial Chemistry, Sir M.V. Government Science College, Bommanakatte, Bhadravathi 577451, India
3Department of Microbiology, Sahyadri Science College, Shimoga 577 203, India

Received 18 May 2013; Accepted 5 August 2013

Academic Editor: Ponnurengam Malliappan Sivakumar

Copyright © 2013 N. D. Jayanna et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


Some novel 1-(5,7-dichloro-1,3-benzoxazol-2-yl)-1H-pyrazolo[3,4-b]quinoline derivatives 8(a–f) were synthesized by reacting 5,7-dichloro-2-hydrazino-1,3-benzoxazole 4 and substituted-2-chloro-3-quinoline carbaldehydes using p-toluenesulfonic acid (PTSA) as a catalyst for the cyclisation. The target molecules have been characterized by IR, 1H NMR, 13C NMR, and mass spectral studies. The synthesized compounds were screened for biological activities, and some of the compounds have exhibited encouraging antibacterial and antioxidant activities. The compounds 8a and 8e showed potent antibacterial activity, whereas the compounds 8e and 8f act as antioxidants.