title: 15N NMR of 1,4-dihydropyridine derivatives.
abstract: 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.
authors.affiliation: Physical Organic Chemistry, Latvian Institute of Organic Synthesis, Riga, Latvia. inguna@osi.lv
authors.forename: Inguna
authors.initials: I
authors.lastname: Goba
authors.forename: Edvards
authors.initials: E
authors.lastname: Liepinsh
mesh_terms: D004095:Dihydropyridines / Q000737:chemistry*; D009682:Magnetic Resonance Spectroscopy; D009587:Nitrogen Isotopes; D011789:Quantum Theory
chemical_list: D004095:Dihydropyridines; D009587:Nitrogen Isotopes; C038806:1,4-dihydropyridine