N-Unsubstituted 2,3-dihydro-1,4-diazepinium salts 4 a -d are N-methylated readily (-5ad) by using iodomethane and potassium carbonate in dimethylformamide. The 2,3dihydro-5,7-diphenyl-I ,4-diazcpinium salt 4 d could be N-ethylated but not N-isopropylated, presumably for steric reasons. Vicinal crowd
Diazepines—XXII : 13C NMR spectra of 2,3-dihydro-1,4-diazepinium salts
✍ Scribed by D. Lloyd; R.K. Mackie; H. McNab; K.S. Tucker; D.R. Marshall
- Book ID
- 103400683
- Publisher
- Elsevier Science
- Year
- 1976
- Tongue
- French
- Weight
- 442 KB
- Volume
- 32
- Category
- Article
- ISSN
- 0040-4020
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2,3-Dihydro-6-(4-hydroxyphenyl)-l,4-diazepinium salts 3a, b are readily mono-(+ 4a, b) and di-brominated (+ 5a, b) at the rneta-postion of the phenyl substituent. 2,3-Dihydro-6-(3hydroxyphenyl)-l,4-diazepinium salts 6a, b are readily mono-brominated (+ 7a, b) at the para-position of the phenyl subst
## Abstract Analysis of the ^13^C NMR spectra of a series of 2,3‐dihydro‐1__H__‐pyrrolo[1,2‐c]imidazole derivatives has provided chemical shift data for (˜184 ppm), (˜173.5 ppm), (˜158 ppm) and (˜148 ppm) groups. A full analysis of the ^13^C chemical shifts of the C atoms of the pyrrole ring an