Preparation of 3,4,5-Trisubstituted 1,2,4-Oxadiazolium Salts from Nitrilium Salts
β Scribed by Abu-;El-Halawa, Rajab ;Shrestha-;Dawadi, Prativa Bade ;Jochims, Johannes C.
- Publisher
- Wiley (John Wiley & Sons)
- Year
- 1993
- Tongue
- English
- Weight
- 647 KB
- Volume
- 126
- Category
- Article
- ISSN
- 0009-2940
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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