Some derivatives of benzoxazolinone are studied by 'H and 13CNMR spectroscopy. 6-Crotonoyl (or cinnamoyl)-3methylbenzoxazolinones exist in the (8configuration and prefer the syn-planar conformation. 2,3-Dihydro-2,5-and 2,3dihydro -2,7 -dioxo -3-methylcyclopenta -[flbenzoxazoles are easily distinguis
1H and 13C NMR studies of substituted isoquinolinium derivatives in different solvents
✍ Scribed by W. Werra; D. Heber; U. Holzgrabe
- Publisher
- John Wiley and Sons
- Year
- 1992
- Tongue
- English
- Weight
- 380 KB
- Volume
- 30
- Category
- Article
- ISSN
- 0749-1581
No coin nor oath required. For personal study only.
✦ Synopsis
Abstract
^1^H and ^13^C NMR data for 1‐cyano‐, 4‐cyano‐, 4‐bromo‐ and 4‐bromo‐5‐nitro‐substituted isoquinolines, isoquinoline N‐oxides and N‐methoxy and N‐ethyl salts in different solvents are reported. The substituent chemical shifts are discussed with regard to the reactivity of the N‐methoxy compounds in the presence of nucleophilic reagents.
📜 SIMILAR VOLUMES
## Abstract ^1^H, ^13^C and ^17^O NMR spectra for 22 substituted nitropyridines were measured and their ^1^H NMR spectra were analysed. The most significant variations in the NMR parameters are found for isomeric hydroxy derivatives, owing to the possibility of keto–enol tautomerism. The prevalence
## 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
The "C NMR chemical shifts for a series of substituted tricycle[ 5.3.0.02.6] decan-3-ones and tricycle[ 5.4.0.02~6]undecan-8-ones derived from [ 2 + 21 photoaddition reactions are assigned and the influence of various substituents is discussed. In general, it was found that substituent shifts are le
## Abstract For Abstract see ChemInform Abstract in Full Text.