<sup>1</sup>
H, <sup>13</sup>
C and <sup>15</sup>
N NMR spectral analysis of substituted 1,2,3,4-tetrahydro-pyrido[1,2-<i>a</i>
]pyrimidines
作者:Ulrich Girreser、Ullvi Bluhm、Bernd Clement、Dieter Heber
DOI:10.1002/mrc.4005
日期:2013.11
The NMR spectroscopic data of a series of thirty‐four 3‐acylpyrido[1,2‐a]pyrimidinium salts are analyzed, which were prepared as either perchlorates or chlorides. Methyl group substituted 3‐aroyltetrahydropyrido[1,2‐a]pyrimidines with the methyl substituent in positions 6, 8 and 9 as well as both in positions 6 and 8 were investigated bearing various aroyl substituents. Unequivocal assignment of all
分析了一系列 34 种 3-酰基吡啶并 [1,2-a] 嘧啶鎓盐的 NMR 光谱数据,这些盐制备为高氯酸盐或氯化物。研究了甲基取代的 3-芳酰基四氢吡啶并 [1,2-a] 嘧啶在 6、8 和 9 位以及 6 和 8 位具有甲基取代基,并带有各种芳酰基取代基。所有共振的明确分配是通过二维 1H,1H-COSY 测量、1H,13C 和 1H,15N HSQC 以及 HMBC 实验实现的,并评估了杂环系统中重要的诊断 CH 和 NH 偶联。分析了甲基取代基对质子、碳和氮位移的影响。发现抗衡离子对吡啶并嘧啶所讨论的核的某些化学位移有显着影响,允许间接检测阴离子,这是通过直接测量高氯酸盐的 35Cl 核来证实的。版权所有 © 2013 John Wiley & Sons, Ltd.