Abstract: A computer-aided predictions of antioxidant activities were performed with the Prediction Activity Spectra of Substances (PASS) program. Antioxidant activity of compounds 1, 3, 4 and 5 were studied using 1,1-diphenyl-2-picrylhydrazyl (DPPH) and lipid peroxidation assays to verify the predictions obtained by the PASS program. Compounds 3 and 5 showed more inhibition of DPPH stable free radical at 10−4 M than the well-known standard antioxidant, butylated hydroxytoluene (BHT). Compound 5 exhibited promising in vitro inhibition of Fe2+-induced lipid peroxidation of the essential egg yolk as a lipid-rich medium (83.99%, IC50 16.07 ± 3.51 µM/mL) compared to a-tocopherol (a-TOH, 84.6%, IC50 5.6 ± 1.09 µM/mL). The parameters for drug-likeness of these BHT analogues were also evaluated according to the Lipinski’s “rule-of-five” (RO5). All the BHT analogues were found to violate one of the Lipinski’s parameters (LogP > 5), even though they have been found to be soluble in protic solvents. The predictive polar surface area (PSA) and absorption percent (% ABS) data allow us to conclude that they could have a good capacity for penetrating cell membranes. Therefore, one can propose these new multipotent antioxidants (MPAOs) as potential antioxidants for tackling oxidative stress and lipid peroxidation processes.
Keywords: butylated hydroxyltolouene; drug-likeness properties; DPPH; lipid peroxidation; multipotent antioxidant; rule-of-five; PASS and activity prediction; thiosemicarbazide; 1,2,4-triazole; 1,3,4-thiadiazole
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Yehye, W.A.; Abdul Rahman, N.; A. Alhadi, A.; Khaledi, H.; Ng, S.W.; Ariffin, A. Butylated Hydroxytoluene Analogs: Synthesis and Evaluation of Their Multipotent Antioxidant Activities. Molecules 2012, 17, 7645-7665.
Yehye WA, Abdul Rahman N, A. Alhadi A, Khaledi H, Ng SW, Ariffin A. Butylated Hydroxytoluene Analogs: Synthesis and Evaluation of Their Multipotent Antioxidant Activities. Molecules. 2012; 17(7):7645-7665.
Yehye, Wageeh A.; Abdul Rahman, Noorsaadah; A. Alhadi, Abeer; Khaledi, Hamid; Ng, Seik Weng; Ariffin, Azhar. 2012. "Butylated Hydroxytoluene Analogs: Synthesis and Evaluation of Their Multipotent Antioxidant Activities." Molecules 17, no. 7: 7645-7665.