Generation of Trityl Radicals by Nucleophilic Quenching of Tris(2,3,5,6-tetrathiaaryl)methyl Cations and Practical and Convenient Large-Scale Synthesis of Persistent Tris(4-carboxy-2,3,5,6-tetrathiaaryl)methyl Radical
作者:Olga Yu. Rogozhnikova、Vladimir G. Vasiliev、Tatiana I. Troitskaya、Dmitry V. Trukhin、Tatiana V. Mikhalina、Howard J. Halpern、Victor M. Tormyshev
DOI:10.1002/ejoc.201300176
日期:2013.6
Tris(2,3,5,6-tetrathiaaryl)methyl cations, which were generated from the corresponding triarylmethanols in the presence of strong acids, underwent reaction with nucleophiles to give trityl radicals, as the product of a one-electron reduction of the carbocation. Depending on the nature of the nucleophile, the only byproducts were either diamagnetic quinone methides or asymmetrical monosubstituted trityl
三(2,3,5,6-四硫芳基)甲基阳离子是由相应的三芳基甲醇在强酸存在下产生的,与亲核试剂反应生成三苯甲基自由基,作为碳阳离子单电子还原的产物。根据亲核试剂的性质,唯一的副产物是抗磁性醌甲基化物或不对称单取代三苯甲基自由基。在此,我们报告了芬兰三苯甲基的大规模合成方案,该方案具有总产率高和重现性好的优点。