Reductive sulfur extrusion reaction of 2,1,3-benzothiadiazole compounds: a new methodology using NaBH4/CoCl2·6H2O(cat) as the reducing system

Eight aromatic diamines were prepared from 2,1,3-benzothiadiazole compounds in high yields using NaBH4/CoCl2·6H2O(cat) as the catalytic reducing system.