Nagarajan, K.; Sudarsanam, V.; Shenoy, S. J., Indian Journal of Chemistry - Section B Organic and Medicinal Chemistry, 1982, vol. 21, # 11, p. 997 - 1005
2-Dichloracetamido-1-methyl-5-nitroimidazole undergoes novel cycloaddition with diazomethane to form 5-dichloracetylimino-tetrahydroimidazopyrazoles via 2-dichloracetylimino-1,3-dimethyl-5-nitroimidazoline.