Maroš Bella, V. Milata
Mar 1, 2008
Citations
0
Influential Citations
8
Citations
Journal
Journal of Heterocyclic Chemistry
Abstract
4-Nitrobenzoselenadiazole was methylated with dimethylsulphate to give corresponding 1-N-methyl-4-nitrobenzoselenadiazolium methylsulphate which after alkaline ring-opening afforded 1-N-methyl-3-nitro-1,2-phenylenediamine in 90% yield. This compound was also prepared from 3-nitro-1,2-phenylenediamine by monomethylation through tosylation, methylation and detosylation and was confirmed and characterised as 1-methyl-4-nitrobenzimidazole. Methylation of 5-nitrobenzoselenadiazole and subsequent alkaline ring-opening led to unseparable mixture of both methylated products.