1,4-dithlino(2,3-c; 6, -c')diisothiazole and related compounds

Details 1,4-dithlino(2,3-c; 6, -c')diisothiazole and related compounds 1,4-dithlino(2,3-c; 6, -c')diisothiazole and related compounds

C - Chemistry, Metallurgy

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C07D 513/14 (2006.01) C07D 339/08 (2006.01) C07D 513/12 (2006.01) C08G 69/26 (2006.01) C08G 69/42 (2006.01) C09B 21/00 (2006.01) C09B 49/06 (2006.01) C09K 3/00 (2006.01) D06L 3/12 (2006.01) C09K 11/06 (2006.01)

Patent

CA 1064500

ABSTRACT OF THE DISCLOSURE The compound 3,7-dicyano-1,4-dithiino[2,3-c; 6,5-c'] diisothiazole is prepared by reacting either tetracyano-1,4- dithiin or 4,5-dicyano-1,3-dithiolen-2-one with sulfur in 1,2-dimethoxyethane at a temperature of 50-280°C in the presence of a basic catalyst. The diisothiazole can be converted to derivatives with various utilities, e.g., as fluorescent brighteners.

263818

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