Title:Synthesis, Characterization, and in vitro Anti-Inflammatory Activity of
Novel Ferrocenyl(Piperazine-1-Yl)Methanone-based Derivatives
Volume: 19
Issue: 9
Author(s): Banfeng Ruan, Jin Li, Qinglei Guo, Min Zhang, Zhouyang Pei*Yong Hu*
Affiliation:
- Anhui Wannan Tobacco Co.,
Ltd, Xuancheng, 242000, P.R. China
- Agro-products Processing Research Institute, Anhui Academy of Agricultural
Sciences, Hefei, 230001, P.R. China
Keywords:
Ferrocene, sulfamides, carboxamides, synthesis, anti-inflammatory activity, macrophages.
Abstract:
Background: Inflammation is closely related to the occurrence and development of various
diseases in the clinical scope. Finding effective anti-inflammatory agents is of great significance
for clinical treatment. A series of novel ferrocenyl(piperazine-1-yl)methanone-based sulfamides and
carboxamides were synthesized to discover potent anti-inflammatory agents.
Methods: The compounds were characterized by 1H NMR, 13C NMR, and MS spectra. Compound
5h was further determined by single crystal X-ray diffraction. All the target compounds were
screened for anti-inflammatory activity by evaluating the inhibition effect of LPS-induced NO production
in RAW264.7 macrophages. The novel compound (4i) is the preliminary anti-inflammatory
mechanism detected by western blot.
Results: In a multi-stage screening campaign, compound 4i was shortlisted, which exhibited physicochemical
properties suitable for human administration. Among them, compound 4i was found to
be most potent in inhibiting NO production (IC50 = 7.65 μM) with low toxicity. This compound also
exhibited significant inhibition of the production of iNOS and COX-2. Preliminary mechanism studies
indicated that compound 4i could inhibit the activation of the LPS-induced TLR4/NF-κB signaling
pathway.
Conclusion: The promising anti-inflammatory activity of compound 4i compared with the reference
drug suggests that this compound may contribute as a lead compound in the search for new potential
anti-inflammatory agents.