Synthesis and conformational properties of substituted 1,4,2-oxazasilinanes: low temperature NMR study and quantum chemical calculations
作者:Nataliya F. Lazareva、Alexandr I. Albanov、Bagrat A. Shainyan、Erich Kleinpeter
DOI:10.1016/j.tet.2011.11.077
日期:2012.1
A number of N-substituted 2,2-dimethyl-1,4,2-oxazasilinanes 1 were synthesized and studied by variable temperature dynamic 1H and 13C NMR spectroscopy, room temperature 15N NMR spectroscopy and theoretical calculations at the DFT and MP2 levels of theory. Both the preferred conformers were assigned and the barrier to the ring inversion of the saturated six-membered ring determined. From 1 the corresponding
合成并通过可变温度动态1 H和13 C NMR光谱,室温15 N NMR光谱以及在DFT和MP2上的理论计算来合成和研究许多N-取代的2,2-二甲基-1,4,2-恶唑烷烷1理论水平。分配了两个优选的构象异构体,并确定了饱和六元环的环反转的势垒。由1产生相应的甲基碘化物盐,通过X射线分析研究它们的结构,发现与理论计算的结果非常吻合。