New route for preparation of nitrosubstituted 1,2‐phenylenediamines
作者:MaroŠ Bella、Viktor Milata
DOI:10.1002/jhet.5570450220
日期:2008.3
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