5,7-Dimethyl- and 1,4,5,7-tetramethyl- 2,3-dihydro-1,4-diazepinium perchlorates have been nitrated. These are the first examples of attack on the 2,3-dihydro-1,4-diazepinium ring by a positively charged electrophilic species. Ultraviolet, infrared, and proton magnetic resonance spectra have been recorded.
C. Barnett, J. Chem. Soc. C, 1967, 2436 DOI: 10.1039/J39670002436
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