Characterization of 4,5-Dihydro-1H-Pyrazole Derivatives by 13C NMR Spectroscopy
✍ Scribed by M. Dora Carrión; Mariem Chayah; Duane Choquesillo-Lazarte; Miguel A. Gallo; Antonio Espinosa; Antonio Entrena; M. Encarnación Camacho
- Book ID
- 112146853
- Publisher
- John Wiley and Sons
- Year
- 2012
- Tongue
- English
- Weight
- 138 KB
- Volume
- 50
- Category
- Article
- ISSN
- 0749-1581
- DOI
- 10.1002/mrc.2843
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## Abstract Sodium borohydride reduction of methylphenobarbital leads to the formation of two different dihydroderivatives, reduced either in position 4 or position 6. The structures of the derivatives have been determined through analysis of the ^1^H and ^13^C NMR spectra of phenobarbital, methylp
## REFERENCE DATA carbons, for various substituent groups and positions were carried out by gated decoupling with NOE. ## RESULTS AND DISCUSSION The I3C NMR chemical shifts of the compounds are shown in Tables 123; 'J(CH) and long-range coupling constants of 2, 9, 13 and 18, measured by gated d
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