caa a22 4500 467992932 CHVBK 20180323112549.0 cr unu---uuuuu 170328e19900801xx s 000 0 eng 10.1007/BF00480866 doi (NATIONALLICENCE)springer-10.1007/BF00480866 Configuration of benzoylpyridineoximes studied by 1H and 13C NMR. Effect of protonation of the pyridine nitrogen atom [Elektronische Daten] [V. Lezina, S. Rozenberg, O. Glozman, L. Zhmurenko, V. Zagorevskii] A simple and convenient method is proposed for determining the configuration of E,Z-isomers of 2-, 3-, and 4-benzoylpyridines. The difference in chemical shifts (δδ, ppm) in the system CCl4-DMSO-D6 and CCl4-DMSO-CF3COOD for the α-H atoms or the α, Β-C atoms of the pyridine ring can be used to determine the configuration. The shift (δδ) of the α-H signals to weak field is greater for the Z-isomers than for the E-isomers due to protonation of the pyridine nitrogen atom. The reverse dependence is seen in the 13C NMR for the E,Z-isomers. The signals of the α-C atoms shift to stronger field after protonation. Plenum Publishing Corporation, 1991 Lezina V. Scientific-Research Institute of Pharmacology, USSR Academy of Medical Sciences, 125315, Moscow aut Rozenberg S. Scientific-Research Institute of Pharmacology, USSR Academy of Medical Sciences, 125315, Moscow aut Glozman O. Scientific-Research Institute of Pharmacology, USSR Academy of Medical Sciences, 125315, Moscow aut Zhmurenko L. Scientific-Research Institute of Pharmacology, USSR Academy of Medical Sciences, 125315, Moscow aut Zagorevskii V. Scientific-Research Institute of Pharmacology, USSR Academy of Medical Sciences, 125315, Moscow aut Chemistry of Heterocyclic Compounds Kluwer Academic Publishers-Plenum Publishers 26/8(1990-08-01), 898-902 0009-3122 26:8<898 1990 26 10593 https://doi.org/10.1007/BF00480866 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/BF00480866 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Lezina V. Scientific-Research Institute of Pharmacology, USSR Academy of Medical Sciences, 125315, Moscow aut NATIONALLICENCE 700 1- Rozenberg S. Scientific-Research Institute of Pharmacology, USSR Academy of Medical Sciences, 125315, Moscow aut NATIONALLICENCE 700 1- Glozman O. Scientific-Research Institute of Pharmacology, USSR Academy of Medical Sciences, 125315, Moscow aut NATIONALLICENCE 700 1- Zhmurenko L. Scientific-Research Institute of Pharmacology, USSR Academy of Medical Sciences, 125315, Moscow aut NATIONALLICENCE 700 1- Zagorevskii V. Scientific-Research Institute of Pharmacology, USSR Academy of Medical Sciences, 125315, Moscow aut NATIONALLICENCE 773 0- Chemistry of Heterocyclic Compounds Kluwer Academic Publishers-Plenum Publishers 26/8(1990-08-01), 898-902 0009-3122 26:8<898 1990 26 10593 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer