Palladium-Catalyzed Direct Arylation of 2-Pyridylmethyl Silanes with Aryl Bromides
作者:Tingzhi Lin、Pengcheng Qian、Yan-En Wang、Mingjie Ou、Long Jiang、Chen Zhu、Yuchuan Xu、Dan Xiong、Jianyou Mao
DOI:10.1021/acs.orglett.1c00677
日期:2021.4.16
The first palladium-catalyzeddirectarylation of 2-pyridylmethyl silanes with aryl bromides to generate a diverse array of aryl(2-pyridyl)-methyl silane derivatives has been developed. This protocol facilitates access to various kinds of heterocycle-containing silanes in good to excellent yields (40 examples, 66–97% yield) with good functional group tolerance. The scalability of this transformation
Comparison of Carbon−Silicon Hyperconjugation at the 2- and 4-Positions of the <i>N</i>-Methylpyridinium Cation
作者:Kathryn Hassall、Sofia Lobachevsky、Jonathan M. White
DOI:10.1021/jo048384p
日期:2005.3.1
pyridinium cations 6a−c and 4-trialkylsilylmethylpyridinium cations 5a−c were prepared and investigated using 29Si and 13C NMR and single-crystal X-ray crystallography. Systematic differences in the 29Si chemical shifts and 29Si−13C one-bond coupling constants for these cations suggested that the Si−CH2 bond interacts more strongly at the 2-position of the electron-deficientpyridinium ring than at
制备了N-甲基-2-三烷基甲硅烷基甲基吡啶阳离子6a - c和4-三烷基甲硅烷基甲基吡啶阳离子5a - c并使用29 Si和13 C NMR和单晶X射线晶体学进行了研究。这些阳离子在29 Si化学位移和29 Si - 13 C单键耦合常数上的系统差异表明,Si-CH 2键在缺电子吡啶鎓环的2位上比在4位上的相互作用更强。位置。吡啶鎓阳离子5b和6b的X射线结构证明了这一结果。