ArticleBioorganic & medicinal chemistry2023
Design, synthesis and anticancer activity of N-aryl indolylsulfoximines: Identification of potent and selective anticancer agents.
Article in Bioorganic & medicinal chemistry, 2023. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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5 authors at 1 institution in 2 countries.
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Abstract
A facile and efficient approach utilizing copper-mediated cross-coupling reaction of N-boc-3-indolylsulfoximines with aryl iodides was developed to synthesize a diverse range of N-arylated indolylsulfoximines 11a-m in excellent yields (up to 91%). The key precursors, free NH sulfoximines 9 were readily prepared by the treatment of N-boc-3-methylthioindoles 8 with a combination of IBD and ammonium carbamate. Under similar conditions NH-free indolylsulfoximine 9a was successfully prepared in gram-scale quantities. The reaction is highly chemoselective and tolerant of a wide range of functional groups. The process is environmentally friendly and is amenable to scale-up. Among the prepared N-arylated indolylsulfoximines 11a-m, compounds 11i-j (2.68-2.76 μM), 11f-g (1.9-3.7 μM) and 11k (1.28 μM) showed potent and selective cytotoxicity against 22Rv1, C4-2 and MCF7 cells, respectively. Indolylsulfoximine derivative 11l displayed a broad spectrum of activity (1.7-8.2 μM) against the tested cancer cell lines. These compounds were found to be non-cytotoxic to normal HEK293 cells, indicating their potential selectivity for cancer cells. We analysed the impact of 11l on various cellular assays to uncover its mechanism of action. Cellular assay shows that 11l increases the endogenous level of ROS, leading to the increased level of p-53 and c-jun inducing apoptosis. 11l also induced mitochondrial dysfunction, further promoting apoptotic pathways. Besides, 11l also restricts cell invasiveness, indicating that it could serve as an effective anti-metastatic agent. As oxidative stress severe F actin causing tubulin depolymerization, we examined the impact of 11l on tubulin dynamics. Accordingly, 11l treatment decreased the levels of polymerized tubulin in 22Rv1 and C4-2 cells. Although future studies are needed to determine their exact molecular target(s), our data shows that N-aryl indolylsulfoximines could serve as effective anti-cancer agents.
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