PROCESS FOR PREPARING 5-AMINO-1,2,3-THIADIAZOLES

摘要

There is provided a process for preparing a 5-amino-1,2,3-thiadiazole represented by the formula wherein R represents a hydrogen atom, a lower alkyl group or an aryl group, which comprises bringing a diazoacetonitrile represented by the formula wherein R has the same meaning as defined above, into contact with hydrogen sulfide in the presence of a base or with a salt of hydrogen sulfide, in a solvent.