Convenient methods for the preparation of stable, fused selenazolinium salt systems with a Se–N+ bond have been developed. The mechanism for the formation of the selenazole cycle was investigated in detail by conducting multinuclear NMR experiments. The ability of these compounds to form stable inner salts was demonstrated. We have shown the glutathione peroxidase (GPx) like properties of selenazolopyridinium
已经开发了用于制备稳定的、具有 Se-N+ 键的稠合硒唑啉盐体系的便捷方法。通过进行多核核磁共振实验,详细研究了硒唑循环的形成机制。证明了这些化合物形成稳定内盐的能力。我们已经通过氧化含硫的天然氨基酸以及芳香醛和杂芳香醛,展示了硒唑并吡啶鎓盐的类似谷胱甘肽过氧化物酶 (GPx) 的特性。大多数化合物的分子结构已通过 X 射线衍射研究证实。
Carbon Dioxide Triggered and Copper-Catalyzed Domino Reaction: Efficient Construction of Highly Substituted 3(2<i>H</i>)-Furanones from Nitriles and Propargylic Alcohols
A novel carbon dioxide triggered and copper-catalyzed domino reaction for the efficient synthesis of highlysubstituted 3(2H)-furanones from readily available nitriles and propargylic alcohols has been developed. Carbon dioxide is a prerequisite for achieving the present catalytic transformation, and one of the oxygen atoms of carbon dioxide is incorporated into the 3(2H)-furanones. Nitriles not only
An efficient and general kinetic resolution of azaarylethynyl tertiary alcohols was developed by a novel phosphine-mediated deoxygenation strategy catalysed by a chiral Brønsted acid. Besides enabling the asymmetric construction of azaarene-functionalized tertiary alcohols of biological importance, the method provides a precise synthetic path to generate enantioenriched azaaryl-functionalized allenes