2-(Dicyanomethylene)-1,3-dithiolo(4,5-b)pyrazine-5,6-dicarbonitrile is prepared by reacting di(sodiomercapto)methylenemalononitrile with 2,3-dichloro-5,6-dicyanopyrazine in dimethylformamide as reaction medium at a temperature between about 25.degree. and about 60.degree. C until reaction is substantially complete. The reaction product has antimicrobial utility.
2-(二
氰亚甲基)-1,3-二
硫杂并[4,5-b]
吡嗪-5,6-二羧腈是通过将二(
硫代)甲基
丙二腈与2,3-二
氯-5,6-二
氰基
吡嗪在二甲基甲酰胺中作为反应介质,在约25℃至60℃的温度下反应直至反应基本完成而制备的。该反应产物具有抗微
生物作用。