81903-08-4

Upstream product

• 583-53-9 2,3-dibromobenzene 
• 81903-80-2 3,4-dibromophenylsulfonic acid chloride 
• 109-89-7 diethylamine 
• 170697-25-3 3,4-dicyanobenzenesulfonyl chloride 
• 544-92-3 copper(I) cyanide 
• 81902-95-6 4-N,N-diethylsulfamoyl-1,2-dibromobenzene 

Relevant academic research and scientific papers

SYNTHESIS OF SULFONATED 1,2-DICYANOBENZENES

Employing the corresponding halogen or amino (via the diazonium salts) substituted 1,2-dicyanobenzenes as starting materials 2,3- and 3,4-dicyanobenzenesulfonic acids (3) and (4) are synthesized.Several intermediates useful for the preparation of the sulfonic acids (3) and (4) are also obtained: 3- and 4-mercapto-1,2-dicyanobenzenes (5), (16), 2,3- and 3,4-dicyanobenzenesulfonyl chlorides (10), (11), bis(2,3-dicyanophenyl)- and bis(3,4-dicyanophenyl)-disulfides (14), (15), and several sulfonamides (17)-(24) (from the sulfochlorides (10), (11).In addition, the synthesis of 4-(4-phonoxy-1,2-dicarbonitrile)benzenesulfonic acid (26) is described. Key words: Dicyanobenzenesulfonic acids, 1,2-dicyanobenzene substituted, phthalonitrile substituted.