Back to results
US 4,062,860 AGranted
Process for preparing 3,4-dicyano-1,2,5-thiadiazole
AssigneeMontedison S.p.A.
InventorsGiuseppe Ribaldone, Renato Grecu
Life of this patent
Estimating the term…
Abstract
3,4-DICYANO-1,2,5-THIADIAZOLE IS PREPARED BY REACTING DIAMINOMALEONITRILE (DAMN) with thionyl chloride (SOCl.sub.2) at a temperature of 40.degree. C. up to the boiling point of thionyl chloride wherein the molar ratio of SOCl.sub.2 /DAMN is between 2:1 and 10:1.
Claims8
A process for preparing 3,4-dicyano-1,2,5-thiadiazole comprising reacting diaminomaleonitrile with thionyl chloride wherein the thionyl chloride/diaminomaleonitrile molar ratio is from 2:1 to 10:1 at a temperature between 40.degree. C. and the boiling point of thionyl chloride.
Dependencies are inferred from the claim text.