Synthesis and antitumor activity of optically active thiourea and their 2-aminobenzothiazole derivatives: A novel class of anticancer agents

Manjula, SN and Noolvi, Malleshappa N and Parihar, Vipan K and Reddy, Manohara SA and Ramani, Vijay and Gadad, Andanappa K and Singh, Gurdial and Kutty, Gopalan N and Rao, Mallikarjuna C (2009) Synthesis and antitumor activity of optically active thiourea and their 2-aminobenzothiazole derivatives: A novel class of anticancer agents. European Journal of Medicinal Chemistry, 44 (7). pp. 2923-2929. ISSN 0223-5234

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Abstract

A novel series of optically active 2-aminobenzothiazole derivatives were synthesized by reaction of optically active amine (I) with thiophosgene to obtain optically active isothiocyanates (IIa–h) which on condensation with 4-fluoro-3-chloro aniline (III) yielded various optically active thioureas (IVa–h). Further oxidative cyclisation in the presence of bromine and chloroform yielded title compounds (Va–h). The structures of these compounds were established by IR, 1H NMR, 13C NMR, Mass and HRMS. The compounds (IVa–h and Va–h) were evaluated for in vitro cytotoxicity against mouse Ehrlich Ascites Carcinoma (EAC) and two human cancer cell lines (MCF-7 and HeLa). In preliminary MTT [3-(4,5- dimethylthiazol-2-yl)-2,5-diphenyltetrazolium bromide] cytotoxicity studies the optically active thiourea derivatives (IVe, IVf and IVh) were found most effective. In EAC cells the IC50 values for IVe, IVf, IVh and Vg were found in the range of 10–24 mM, whereas in MCF-7 and HeLa cells the IC50 values were observed in the range of 15–30 mM and 33–48 mM, respectively. In alkaline comet assay the compounds (IVe and IVf) showed dose-dependent DNA damaging activity.

Item Type: Article
Uncontrolled Keywords: 2-Aminobenzothiazoles; Thiourea; Comet assay; MTT assay; DNA damage; MCF-7.
Subjects: Pharmacy > MCOPS Manipal > Pharmacology
Depositing User: KMC Manipal
Date Deposited: 24 Jan 2012 06:19
Last Modified: 24 Jan 2012 06:19
URI: http://eprints.manipal.edu/id/eprint/2692

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