A DFT study of U(VI) hydroxy complexes was performed with special attention paid to the [(UO2)3(OH)5(H2O)4-7]+ and [(UO2)4(OH)7(H2O)5-8]+ species. It was established that the ionicity of the U=O bond increased when moving from [(UO2)(H2O)5]2+, [(UO2)2(OH)(H2O)8]3+, [(UO2)2(OH)2(H2O)6]2+, [(UO2)3(OH)5(H2O)4-6]+ to [(UO2)4(OH)7(H2O)5-8]+ species. In both [(UO2)3(OH)5(H2O)4-6]+ and [(UO2)4(OH)7(H2...

background the aim of the present study was to investigate the effect of ginger and glibenclamide on oxidative stress markers. oxidative stress is caused by an unbalance between a relative overload of oxidants and depletion of antioxidants, as implicated in the pathogenesis of several chronic diseases, including atherosclerosis and diabetes mellitus. regarding the role of oxidative stress in th...

sulfuric acid ([3-(3-silicapropyl)sulfanyl]propyl]ester (saspspe) is employed as a recyclable catalyst for the silylation of hydroxyl groups. a good range of primary, secondary alcohols and phenolic hydroxyl groups were effectively converted into their corresponding trimethylsilyl ethers with hexamethyldisilazane in the presence of catalytic amounts of saspspe at room temperature with short rea...

Highly chemo- and regioselective acylation of 2-aminopentane-1,5-diol derivatives has been achieved by organocatalysis. An acyl group can be chemoselectively introduced onto the sterically hindered secondary hydroxy group in the presence of the primary one by virtue of the molecular recognition event of the catalyst.

The relationship between the antibacterial activity and structure of 9-O,9'-O-demethyl (+)-virgatusin (Virg 3) was examined. The conversion of hydroxy groups on the 9 and 9' positions to amino groups increased the activity. It was found that the 3'-methoxy group was more important for higher activity than the 4'-methoxy group on the 7'-phenyl group, and that the 3,4-methylenedioxy group on the ...