Investigation of the In Vitro Antioxidant, Anticholinesterase, Antiurease, Antityrosinase, and Cytotoxic Properties of a Novel Compound: 4-Methoxy-2-(4-Methoxyphenyl)Benzo[d][1,3,2]Dioxaborole.

In this study, the structure of a new boron compound obtained using 3-methoxy catechol and 4-methoxy phenyl boronic acid was characterized by ¹H, ¹³C NMR, LC-MS-IT-TOF, UV-Vis and FTIR spectroscopy. The antioxidant activities of the newly synthesized compound were evaluated by DPPH free radical scavenging, ABTS quation radical scavenging and CUPRAC copper reducing capacity methods. Anticholinesterase activities were determined by acetylcholinesterase and butyrylcholinesterase enzyme inhibitor assays. Antiurease and antithyrosinase enzyme inhibition activities were also examined. Cytotoxic effects were evaluated on healthy cell lines and breast and colon cancer cell lines using MTT method. The results showed that the synthesized compound has high antioxidant activity. Especially the average antioxidant activity values obtained at 10 μg/mL concentration were found to be statistically significantly (p < 0.05) higher than the reference values of α-TOC and BHT. When the antioxidant activity data (IC₅₀) were compared separately with α-TOC and BHT reference values, the new compound was found to be more effective. In acetylcholinesterase enzyme inhibition, the average activity values were found to be statistically significantly (p < 0.05) higher than the galantamine reference value. However, no statistically significant difference was observed at BChE (% inhibition) level with galantamine reference value. In terms of urease and tyrosinase enzyme inhibition activities, the urease activity of the synthesized compound was statistically significantly (p < 0.05) lower than the thiurea reference value. Tyrosinase activity was statistically significantly (p < 0.05) lower than kojic acid reference values. The synthesized and characterized compound was found to have no toxic effect on healthy cell lines and did not show any cytotoxic effect on breast cancer (MCF-7) and colon cancer (HT-29) cell lines.