A qualitative investigation of substituent effects in the homodienyl-[1,5]-hydrogen shift in vinylaziridines
✍ Scribed by Peter Somfai; Jens Åhman
- Publisher
- Elsevier Science
- Year
- 1995
- Tongue
- French
- Weight
- 225 KB
- Volume
- 36
- Category
- Article
- ISSN
- 0040-4039
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📜 SIMILAR VOLUMES
The thermal rearrangement of an N-substituted vinylaziridine to the corresponding (Z)-allylic imine, i.e. a homodienyl-[1,5]-hydrogen shift, was studied at different temperatures in the range 40-90 "C. 'H NMR spectroscopy was used to follow the reaction. Rate constants and activation parameters were
## Abstract Chloro‐, methoxy‐ and methyl‐substituents in the 4‐position of phenanthrenes exert a profound and diagnostic influence on the ^1^H chemicalshift of H‐5, and from ^13^C measurements it is considered to be dueto an anisotropic effect.
The iniluence of substituents on the 'H, "C and 15N NMR chemical shifts of 2-substituted 5(6)nitrobenzimidazoles and their analogues labelled with 15N in the nitro group was investigated. It was found that the substituent effects are transmitted to the carbon and hydrogen nuclei in positions 4-7 mai