Synthesis and substituent effect study on 13C NMR chemical shifts of 4-(substitue-phenyl)-6-methyl-3-phenyl-4H-1,2,4-oxadiazin-5(6H)-one
作者:Yesim S. Kara、Berna Yıldız
DOI:10.1016/j.molstruc.2021.131787
日期:2022.2
carbons (reverse substituent effect). For the other carbon (CH), positive ρI (normal substitution effect) and negative ρR (reverse substitution effect) values were calculated by DSP regression analysis. As a result of DSP regression analysis, the 13C NMR chemical shift of the C=O, C=N and CH carbons of the oxadiazine ring showed a satisfactory correlation (r > 0.90), while excellent correlation was observed
通过N-取代-苯基-苯甲酰胺肟的反应合成了12种新型4-(取代-苯基)-6-甲基-3-苯基-4H-1,2,4-oxadiazin-5(6H)-one衍生物与 2-溴丙酰氯。合成的 1,2,4-oxadiazin-5-one 衍生物的特征在于它们的物理常数和 IR、1 H NMR、13 C NMR 和 LC/TOF-MS 分析数据。这些 1,2,4-oxadiazin-5-one 衍生物的 C=O、C=N、CH 和 CH 3碳的实验13 C NMR 化学位移 (ppm) (SSC)与各种哈米特取代常数相关和 Swain-Lupton 参数,使用单 (SSP) 和多线性 (DSP) 回归分析。负 ρ I和 ρ R发现了 C=O、C=N 和 CH 3碳的相关性值(反向取代效应)。对于其他碳 (CH),通过 DSP 回归分析计算正 ρ I (正常替代效应) 和负 ρ R (反向替代效应) 值。作为