Mechanistic Analysis of Azine <i>N</i>-Oxide Direct Arylation: Evidence for a Critical Role of Acetate in the Pd(OAc)<sub>2</sub> Precatalyst
作者:Ho-Yan Sun、Serge I. Gorelsky、David R. Stuart、Louis-Charles Campeau、Keith Fagnou
DOI:10.1021/jo101821r
日期:2010.12.3
direct arylation of pyridineN-oxides are presented. The order of each reaction component is determined to provide a general mechanistic picture. The C−H bond cleaving step is examined in further detail through computational studies, and the calculated results are in support of an inner-sphere concerted metalation−deprotonation (CMD) pathway. Competition experiments were conducted with N-oxides of varying
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。