6913-14-0Relevant articles and documents
Oxidative cyclization of dithiobiuret under basic conditions and theoretical tautomeric studies of 5-amino-2,3-dihydro-1,2,4-thiadiazole-3-thione
Cho, Nam Sook,Kim, Young Hoon,Park, Mi Sun,Kim, Eun Hee,Kang, Sung Kwon,Park, Chang-Moon
, p. 1401 - 1409 (2007/10/03)
The oxidative cyclization of dithiobiuret under basic conditions (NaOH-H2O2 or CH3CO3H) afforded bis(5-amino-1,2,4-thiadiazolyl) 3,3′-disulfide (5), oxidative dimer form of 5-amino-3-mercapto-1,2,4-thiadiazole (
Nitrogen and/or sulfur containing heterocyclic azo dyes with aniline, tetrahydroquinoline and benzomorpholine couplers having sulfate group
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, (2008/06/13)
Disclosed are azo dyes prepared by diazotizing heterocyclic amines such as 2-aminobenzothiazole, 3-amino-2,1-benzisothiazole, 5-amino-1,2,4-thiadiazole, 5-aminoisothiazole, 5-aminopyrazole, 2-aminothiophene and 2-amino-1,3,4-thiadiazole, followed by coupling with certain aniline, tetrahydroquinoline, or benzomorpholine compounds containing sulfate groups. These amines may be substituted with a large variety of groups including lower alkyl, lower alkoxy, cyano, carbamoyl, sulfamoyl, and halogen. These dyes have excellent dyeing properties on polyamide fibers and also impart color to cellulose acetate fibers and wool.
Azo dyes from five membered ring heterocyclic amines and aniline, tetrahydroquinoline and benzomorpholine couplers containing thiosulfate alkyl groups
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, (2008/06/13)
Disclosed are mono azo dyes derived from diazotized 5-membered heterocyclic amines and certain aniline, 1,2,3,4-tetrahydroquinoline, and benzomorpholine couplers containing thiosulfate alkyl groups. These dyes are useful for dyeing synthetic fibers, cellulose acetate and wool, and particularly impart fast violet to blue shades on polyamide fibers, and in general, exhibit improved properties such as fastness to light, sublimation, ozone, oxides of nitrogen, perspiration, crock, and wash, and exhibit excellent build, pH stability, bloom resistance, depth of shade, leveling, migration, and the like. The dyes have the general formula: wherein D is a thiadiazol, isothiazol, pyrazol or thiophene type radical, and the Coupler is an aniline, tetrahydroquinoline, or benzomorpholine derivative wherein a --ZSSO3 M group is attached to the nitrogen thereof, the coupler ring may contain substituents such as alkyl, alkoxy, halogen, acylamido, alkylthio or aryloxy, the remaining hydrogen of the aniline coupler may be replaced by a substituent such as alkyl, substituted alkyl, alkenyl, aryl, or cycloalkyl, M is Na+, K+, NH4+ or H+, and Z is a linking group such as ethylene.