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1 H and 13 C NMR spectra of tetrahydroquinoxalines condensed with six‐membered heterocycles
Author(s) -
Charushin V. N.,
Sorokin N. N.,
Chernyshev A. I.,
Baklykov V. G.,
Ponizovsky M. G.,
Chupakhin O. N.
Publication year - 1986
Publication title -
magnetic resonance in chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.483
H-Index - 72
eISSN - 1097-458X
pISSN - 0749-1581
DOI - 10.1002/mrc.1260240909
Subject(s) - chemistry , pyridazine , heteroatom , pyrazine , ring (chemistry) , nmr spectra database , chemical shift , vicinal , crystallography , spectral line , carbon 13 nmr , stereochemistry , coupling constant , computational chemistry , organic chemistry , physics , astronomy , particle physics
The 1 H and 13 C NMR spectra of tetrahydroquinoxalines condensed with pyridazine, pyrazine, oxazine, oxadiazine, thiadiazine or triazine rings have been measured in DMSO‐ d 6 solution. The effects of six‐membered heterocycles on 1 H and 13 C chemical shifts and the values of one‐bond 1 J (CH) and vicinal 3 J (HH) coupling constants for the ring junction fragment are considered. The differences between the 1 H and 13 C spectral parameters of tetrahydroquinoxalines annelated with five‐ or six‐membered heterocycles with the same set of heteroatoms attached to the ring junction carbons are also discussed.