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Abstract

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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.

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Compound Information
Molecular Weight:321.352
Molecular Formula:C14H15N3O4S
InChIKey:BDHWYZFQHZBBMJ-UHFFFAOYSA-N
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