Table of Contents
ISRN Organic Chemistry
Volume 2013 (2013), Article ID 635384, 9 pages
Research Article

Design, Synthesis, and In Vitro Antimicrobial Evaluation of Fused Pyrano[3,2-e]tetrazolo[1,5-c]pyrimidines and Diazepines

Department of Chemistry, National Institute of Technology, Warangal, Andhra Pradesh 506 004, India

Received 16 June 2013; Accepted 18 July 2013

Academic Editors: M. D'Auria, J. C. Menéndez, D. Sémeril, and J. Wu

Copyright © 2013 Sankari Kanakaraju 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.


A series of novel pyranochromene-containing tetrazoles fused with pyrimidinethiones, pyrimidines, and diazepines 3a–f, 4a–f, and 5a–f were synthesized by condensation of the corresponding tetrazoles 2a–f with carbon disulfide, benzaldehyde, and 4-methoxy phenacyl bromide, respectively. The compound 2a–f was obtained by reaction of pyrano[3,2-c]chromenes 1a–f with sodium azide. The structures of the newly synthesized compounds 2a–f to 5a–f were established on the basis of their elemental analyses, IR, 1H NMR, 13C NMR, and mass spectral data. All of the title compounds were subjected to in vitro antibacterial testing against four pathogenic strains and antifungal screening against two fungi. Preliminary results indicate that some of them exhibited promising activities and that they deserve more consideration as potential antimicrobials.