Process for preparing 3-methoxy-4-(4'-aminobenzene-...

Details Process for preparing 3-methoxy-4-(4'-aminobenzene-... Process for preparing 3-methoxy-4-(4'-aminobenzene-...

C - Chemistry, Metallurgy

07

D

260/308.3

C07D 285/10 (2006.01)

Patent

CA 1088548

ABSTRACT OF THE DISCLOSURE 3-Methoxy-4-(4'-aminobenzenesulphonamido)-1,2,5-thia- diazole is prepared by reaction of 3-methoxy-4-chloro- -1,2,5-thiadiazole with sulfanilamide in dimethyl- sulfoxide as solvent and in the presence of alkali- hydroxides or carbonates using a reaction temperature of from ambient temperature to 95°C, whereby per mole of thiadiazole-compound from 1.2 to 1.5 mole of sulfanil- amide and from 1.5 to 3 moles of the alkali hydroxide or carbonate are used, whereafter the reaction product is obtained by acidification.

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