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。
Visible-light induced copper(<scp>i</scp>)-catalysed denitrogenative oxidative coupling of hydrazinylpyridines with terminal alkynes
作者:Vaibhav Pramod Charpe、Aniket A. Hande、Arunachalam Sagadevan、Kuo Chu Hwang
DOI:10.1039/c8gc01180j
日期:——
Visible light mediated copper catalysed denitrogenative oxidative coupling of 2-hydrazinopyridines with terminal alkynes to form 2-(alkyl/arylethynyl) pyridines in the presence of O2 at room temperature is reported with 42 examples. This is the first report on visible light stimulated N2 elimination by an in situ generated copper(II) superoxo/peroxo complex. N2 and water are the only by-products. The
anti-hydromagnesiation of aryl alkynes was established using 1 : 1 molar combination of sodium hydride (NaH) and magnesium iodide (MgI2) without the aid of any transition metal catalysts. The resulting alkenylmagnesium intermediates could be trapped with a series of electrophiles, thus providing facile accesses to stereochemically well-defined functionalized alkenes. Mechanistic studies by experimental
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
Cyclohexenyl- and dehydropiperidinyl-alkynyl pyridines as potent metabotropic glutamate subtype 5 (mGlu5) receptor antagonists
作者:Peter C. Chua、Johnny Y. Nagasawa、Leo S. Bleicher、Benito Munoz、Edwin J. Schweiger、Lida Tehrani、Jeffrey J. Anderson、Merryl Cramer、Janice Chung、Mitchell D. Green、Chris D. King、Grace Reyes-Manalo、Nicholas D.P. Cosford
DOI:10.1016/j.bmcl.2005.06.099
日期:2005.10
Structure-activity relationship studies leading to the discovery of novel mGlu5 receptor antagonists are described. These compounds show high in vitro potency, have good in vivo receptor occupancy, and a reasonable intravenous pharmacokinetic profile. (c) 2005 Elsevier Ltd. All rights reserved.