European Journal of Medicinal Chemistry p. 718 - 726 (2016)
Update date:2022-08-30
Topics:
Kumar, Sunil
Aggarwal, Ranjana
Kumar, Virender
Sadana, Rachna
Patel, Bhumi
Kaushik, Pawan
Kaushik, Dhirender
Synthesis of fourteen analogues of bacillamide, a bioactive tryptamide alkaloid of marine origin, has been accomplished through a highly efficient convergent route. The present solvent-free protocol involves the formation of thiazole ring in the initial step followed by amide coupling between substituted ethyl 2-alkyl/aryl/heteroaryl/amino/aminoarylthiazole-4-carboxylates and tryptamine in presence of 2-hydroxy-4,6-dimethylpyrimidine, a solid phase catalyst to yield N-[2-(1H-indol-3-yl)ethyl]-2-alkyl/aryl/heteroaryl/amino/aminoarylthiazole-4-carboxamides as bacillamide analogues having structural variation at position-2 of thiazole ring. Bacillamide and its analogues were evaluated for their cytotoxic activity against three cancer cell lines (HCT-116, MDA-MD-231 and JURKAT cell lines) using colorimetric cell proliferation assay. Compounds 17a and 17b exhibited potent anti-cell proliferation activity with IC50values in the range of ~3.0?μM and ~0.1–0.6?μM, respectively against these cell lines. Preliminary mechanism of action studies indicates that these compounds initiate caspase dependent apoptosis. Also, compounds 16d, 16f, 17a and 17d exhibited excellent anti-inflammatory activity comparable to well-known NSAID indomethacin and better to bacillamide, when evaluated using carrageenan induced rat hind paw oedema method.
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