Syntheses in the benzo[2,1,3]thiadiazole series
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The synthesis of the previously unknown 7-bromobenzo[2,1–3]thiadiazole-4-sulfonic acid, its acid chloride and amides, and the corresponding sulfinic acid, which was subsequently converted to the ethylsulfonyl derivative, is described. It is shown that the bromine in amides of 7-bromobenzo[2,1,3]thiadiazole-4-sulfonic acid and the corresponding 4-ethylsuifonyl derivative is readily replaced by an amine.
KeywordsChloride Organic Chemistry Amide Bromine Acid Chloride
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