对(氧化)金催化的选定关键反应的广泛动力学研究集中在催化活性的降低,这是由于吡啶衍生物引起的金(I)催化剂的抑制,如果使用N氧化物作为副产物获得的吡啶衍生物氧气供体。不管它们的市售性如何,都已对受检吡啶衍生物及其相应的N-氧化物进行了选择。特别注意的是迄今为止在大多数反应筛选中都被忽略的实际益处。用GC和1监测测试反应1 H NMR光谱。所接收的反应常数提供了关于杂环的电子结构与催化活性之间的相关性的信息。根据收集的动力学数据,有可能开发出一套基本的三种N氧化物,这些氧化物必须在进一步的氧化金(I)催化反应中加以考虑。
The incorporation of an electron-accepting unit into π-conjugated systems is an important approach to modulate the physical properties of such molecules. To investigate the potential of tetrazolo[1,5-a]pyridine as an electron-accepting unit, a series of diarylated tetrazolo[1,5-a]pyridine derivatives was synthesized by treating the corresponding diarylated pyridine N-oxide with diphenylphosphoryl azide
将电子接受单元结合到 π 共轭体系中是调节此类分子物理性质的重要方法。为了研究四唑并[1,5 - a ]吡啶作为电子接受单元的潜力,通过用二苯基磷酰叠氮化物处理相应的二芳基化吡啶N-氧化物,合成了一系列二芳基化四唑并[1,5- a ]吡啶衍生物。这些分子的热重分析表明它们具有良好的热稳定性。噻吩取代的四唑并[1,5- a ]吡啶化合物在重复偏压条件下表现出稳定的晶体管特性。
Chemo- and Regioselective Alkylation of Pyridine <i>N</i>-Oxides with Titanacyclopropanes
herein they react preferentially with pyridineN-oxide to accomplish C2–H alkylation beyond these functionalities with double regioselectivity. After being pyridylated at the less hindered C–Ti bond, the remaining C–Ti bond of titanacyclopropanes can be further functionalized by various electrophiles, allowing facile introduction of complex alkyls onto the C2 of pyridines. Its synthetic potential has been