Frishauf, Holtz, Goodman & Woodward
Process for preparing 5-amino-1,2,3-thiadiazoles
 There is provided a process for preparing a 5-amino-1,2,3-thiadiazole represented by the formula ##STR1## wherein R represents a hydrogen atom, a lower alkyl group or an aryl group, which comprises bringing a diazoacetonitrile represented by the formula ##STR2## 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. 
Ube Industries, Ltd.
C
C07D
inventional
Katsumasa Yoshikatsu Mamoru
Harada Mori Nakai