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Detection of the damage caused to DNA by a thiophene-S-oxide using an electroch...
Brett, Ana Maria Oliveira; Silva, Luis Antônio da; Fujii, Hideki; Mataka, Shuntaro; Thiemann, ThiesThe electrochemistry of 3,4-dibenzyl-2,5-dimethylthiophene-S-oxide was investigated as well as its interaction with dsDNA. The electrochemical study of the thiophene-S-oxide was performed at different pH values, in a mixed solvent and by solid state voltammetry, and showed that the molecule is reduced at a very negative potential, and the reduction is pH dependent. A glassy carbon electrode modified with a thic...
Preparation and Electrooxidative SO-Extrusion of Halogenated 7-Thiabicyclo[2.2....
Thiemann, Thies; Melo, M. Luísa Sá e; Neves, André S. Campos; Li, Yuanqiang; Mataka, Shuntaro; Tashiro, Masashi; Geißler, Uwe; Walton, DavidHalogenated thiophenes have been cycloadded oxidatively to maleimides to give halogenated thiabicyclo[2.2.1]heptene S-oxides which have been subjected to an electrochemical extrusion of SO to give various halogeno-substituted phthalimides. ; http://dx.doi.org/10.1039/a707882j
Lewis Acid Catalysis in the Oxidative Cycloaddition of Thiophenes
Li, Yuanqiang; Thiemann, Thies; Sawada, Tsuyoshi; Mataka, Shuntaro; Tashiro, MasashiThiophenes 1 were treated with m-chloroperbenzoic acid (m-CPBA) under BF3·Et2O catalysis to afford thiophene S-monoxides. These could be reacted in situ as intermediary species with a number of dienophiles to provide arenes (with alkynes as dienophiles) or 7-thiabicyclo[2.2.1]hept-2-ene 7-oxides (with alkenes as dienophiles). It was also possible to isolate thiophene S-monoxides in solution and to cycloadd them...
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