The 'H and I3C NMR spectra of six bromo-and methoxybicyclo[3.2.1]octanes were completely assigned. An axial bromine substituent at C-2 or C-4 results in a 5 ppm upfield shift of C-8 due to the gauche interaction. An equatorial bromine results in an upfield shift of similar magnitude on either C-6 (o
NMR Studies of Substituted 2,3-Diaminopropenoates
✍ Scribed by Simona Golič Grdadolnik; Branko Stanovnik
- Publisher
- John Wiley and Sons
- Year
- 1997
- Tongue
- English
- Weight
- 237 KB
- Volume
- 35
- Category
- Article
- ISSN
- 0749-1581
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✦ Synopsis
The orientation of substituted amino groups around the double bond in 2,3-diaminopropenoates, versatile agents in the syntheses of heterocyclic systems, was determined in solution by NMR techniques. Nuclear Overhauser enhancement and long-range 13C-1H coupling constants were measured by NOESY or ROESY and HMBC experiments, respectively. 1997
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