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1H and 13C NMR identification of unexpected 3,4-dihydroquinoxalines in the syntheses of 1,5-benzodiazepine derivatives
Journal article   Peer reviewed

1H and 13C NMR identification of unexpected 3,4-dihydroquinoxalines in the syntheses of 1,5-benzodiazepine derivatives

E. M. Tjiou, E. G. Lhoussaine, Alain Fruchier and David Null Virieux
Magnetic Resonance in Chemistry, Vol.43(7), pp.557-562
28/04/2005
DOI: https://doi.org/10.1002/mrc.1593

Abstract

NMR 1H NMR 13C NMR 15N NMR 5-benzodiazepine 4-dihydroquinoxaline
The reaction between o-phenylenediamines, dehydroacetic acid and aromatic aldehydes is shown to give not only the expected 1,5-benzodiazepine derivative but also a 3,4-dihydroquinoxaline, the structure of which was determined by its 1H and 13C 1D and 2D NMR spectra.
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