Structural and conformational analysis of 1-oxaspiro[2.5]octane and 1-oxa-2-azaspiro[2.5]octane derivatives by 1H, 13C, and 15N NMR
作者:Rubén Montalvo-González、Armando Ariza-Castolo
DOI:10.1002/mrc.3792
日期:2012.1
A structural and conformational analysis of 1-oxaspiro[2.5]octane and 1-oxa-2-azaspiro[2.5]octane derivatives was performed using (1) H, (13) C, and (15) N NMR spectroscopy. The relative configuration and preferred conformations were determined by analyzing the homonuclear coupling constants and chemical shifts of the protons and carbon atoms in the aliphatic rings. These parameters directly reflected
使用(1)H,(13)C和(15)N NMR光谱进行1-氧杂螺[2.5]辛烷和1-氧杂-2-氮杂螺[2.5]辛烷衍生物的结构和构象分析。相对构型和优选构象是通过分析脂族环中的质子和碳原子的同核偶联常数和化学位移确定的。这些参数直接反映了与脂族六元环或C3或N2键合的取代基的空间和电子效应。这些参数对三原子环中这些原子的各向异性位置也很敏感。环外取代基的优选取向指导氧化攻击。