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1H and 13C NMR spectra of tetrahydroquinoxalines condensed with six-membered heterocycles

✍ Scribed by V. N. Charushin; N. N. Sorokin; A. I. Chernyshev; V. G. Baklykov; M. G. Ponizovsky; O. N. Chupakhin

Publisher: John Wiley and Sons
Year: 1986
Tongue: English
Weight: 737 KB
Volume: 24
Category: Article
ISSN: 0749-1581
DOI: 10.1002/mrc.1260240909

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✦ Synopsis

The 'H and uC NMR spectra of tetrahydroquinoxalines condensed with pyridazme, pyrazine, oxazine, oxadiazine, thiadiazine or triazine rings have been measured in DMSO-d, solution. The effects of six-membered heterocycles on 'H and uC chemical shifts and the values of one-bond 'J(CH) and vicinal 3J(HH) coupling constants for the ring junction fragment are considered. The differences between the 'H and =C spectral parameters of tetrahydroquinoxalines aunelated with fiveor six-membered heterocycles with the same set of heteroatoms attached to the ring junction carbons are also discussed.

KEY WORDS 'H NMR 13C NMR condensed tetrahydroquinoxalines.

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