Physical Organic Chemistry, Latvian Institute of Organic Synthesis, Riga, Latvia.
Magn Reson Chem. 2013 Jul;51(7):391-6. doi: 10.1002/mrc.3959. Epub 2013 May 22.
In this article, we describe the characteristic (15)N and (1)HN NMR chemical shifts and (1)J((15)N-(1)H) coupling constants of various symmetrically and unsymmetrically substituted 1,4-dihydropyridine derivatives. The NMR chemical shifts and coupling constants are discussed in terms of their relationship to structural features such as character and position of the substituent in heterocycle, N-alkyl substitution, nitrogen lone pair delocalization within the conjugated system, and steric effects.
在本文中，我们描述了各种对称和不对称取代的 1,4-二氢吡啶衍生物的特征 (15)N 和 (1)HNMR 化学位移和 (1)J((15)N-(1)H)偶合常数。讨论了 NMR 化学位移和偶合常数与结构特征的关系，如杂环中取代基的性质和位置、N-烷基取代、氮孤对在共轭体系中的离域以及空间效应。
