The preparations of 5,7-diphenyl-, 5-p-nitrophenyl-7-phenyl-, 1-methyl-5,7-diphenyl-, 1,5-dimethyl-7-phenyl-, and 1,7-dimethyl-5-phenyl-2,3-dihydro-1,4-diazepinium salts are described. The last two compounds were distinguished by means of their spectra. Alternative condensation products were obtained under different conditions.
A. M. Gorringe, D. Lloyd and D. R. Marshall, J. Chem. Soc. C, 1969, 1081 DOI: 10.1039/J39690001081
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