Abstract
A number of imidazole derivatives 3a–f and 4a–f have been synthesized by the condensation of 3-methylthiophen-2-carboxaldehyde 1a, 5-methylthiophen-2-carboxaldehyde 1b, N-methylpyrrol-2-carboxaldehyde 1c, 1-naphthaldehyde 1d, 2-naphthaldehyde 1e, and 2-hydroxy-1-naphthaldehyde 1f with 1,2-diaminoanthraquinone 2a and 2,3-diaminophenazine 2b, respectively. Condensation of 2-guanidinobenzimidazole with functionalized aldehydes 1a–f leads to the formation of guanidine derivatives 5a–f. Both imidazole (3a–f, 4a–f) and guanidine derivatives (5a–f) were synthesized in good yields using conventional heating and microwave irradiation techniques. Structures assigned to compounds 3a–f, 4a–f and 5a–f are supported by correct spectral and analytic data. On screening for anti-inflammatory and anticancer activities, compounds 3e, 4a and 5a exhibited good anti-inflammatory and compounds 3d, 3f, 4d and 4f showed very good anticancer activity.
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Acknowledgements
We thank the technical staff of the Chemistry Department, IIT. Roorkee, for their assistance in spectroscopic studies and elemental analysis. One of the authors—Mr. Jaiveer Singh (SRF-NET)—thanks the CSIR, New Delhi, for financial assistance.
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Sondhi, S.M., Singh, J., Roy, P. et al. Conventional and microwave-assisted synthesis of imidazole and guanidine derivatives and their biological evaluation. Med Chem Res 20, 887–897 (2011). https://doi.org/10.1007/s00044-010-9410-6
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DOI: https://doi.org/10.1007/s00044-010-9410-6