3,4-Diaryl-2-hydroxy-1,2,5-triazabicyclo[3,2,1]oct-3-enes from the peracid oxidation of 3,4-diaryl-6,7-dihydro-1-methyl-1H-1,2,5-triazepines
Abstract
The reaction of benzil with 1-(2-aminoethyl)-1-methylhydrazine led to 6,7-dihydro-1-methyl-3,4-diphenyl-1H-1,2,5-triazepine, which on treatment with m-chloroperbenzoic acid gave 2-hydroxy-3,4-diphenyl-1,2,5-triazabicyclo[3,2,1]oct-3-ene; this in turn yielded 1-acetyl-2,3-dihydro-5,6-diphenyl-1H-imidazo[1,2-a]imidazole on reaction with acetic anhydride.