A short synthesis of the parp inhibitor 2-(4-trifluoro-methylphenyl)benzimidazole-4-carboxamide (NU1077)
作者:Steven C. Austen、John M. Kane
DOI:10.1002/jhet.5570380427
日期:2001.7
A four-step synthesis of the PARPinhibitor2-(4-trifluoromethylphenyl)benzimidazole-4-carboxamide (1, NU1077) is presented. Condensation of 2,3-diaminotoluene and 4-trifluoromethylbenzaldehyde afforded 4-methyl-2-(4-trifluoromethylphenyl)benzimidazole. Oxidation of the methyl group with potassium permanganate in warm t-butanol afforded the carboxylic acid that was converted to the corresponding carboxamide
Dihydrazone-based dynamic covalent epoxy networks with high creep resistance, controlled degradability, and intrinsic antibacterial properties from bioresources
Herein, we report the design and synthesis of 13 diarylpyrazole hybrids with vanillin constructed as dual compounds against oxidative stress and diabetes. Compounds were tested in two different antioxidant assays. It was found that all compounds showed an important antioxidant activity in both DPPH and ORAC models and the activity was even more remarkable than vanillin. In addition, the hypoglycemic effect of compounds 1, 2, 4 and 12 was evaluated. Interestingly, compound 1 had the most potent hypoglycemic effect with a glycemia reduction of 71%, which was higher than rimonabant. Finally, a DFT study to propose a reasonable antioxidant mechanism is detailed. Both thermodynamic and kinetic studies indicated that the most feasible mechanism consists in the HAT abstraction of the phenolic hydrogen due to the formation of an stable transition state through the most rapid and exergonic path, while the SPLET mechanism is the most significant at higher pH values. (C) 2015 Elsevier Masson SAS. All rights reserved.