Reference

Reactive monoazo dyes

Reactive monoazo dyes. Auerbach, Guenther (Sandoz-Patent-G.m.b.H., Fed. Rep. Ger.). Ger. Offen. DE 3332212 A1 22 Mar 1984, 18 pp. (German). (Germany). CODEN: GWXXBX. CLASS: IC: C09B062-085; C09B029-30; D06P001-382; D06P001-06. APPLICATION: DE 83-3332212 7 Sep 1983. PRIORITY: DE 82-3234505 17 Sep 1982. DOCUMENT TYPE: Patent CA Section: 41 (Dyes, Organic Pigments, Fluorescent Brighteners, and Photographic Sensitizers) Reactive dyes with low sensitivity toward electrolytes and good exhaustion, fixation, and fastness properties are represented by general structure I, where R = x,y,2-R2R3(HO3S)C6H2 (R2 = H, HO3S; R3 = H, halogen, Me, MeO, AcNH) or 1,5,2-(HO3S)2C10H5; R1 = NHCH2CH(OH)CH2OH, N[CH2CH(OH)CH2OH]2, or NR4C6H4R5-o; R4 = C1-4 alkyl or Cl-, CN-, or HO-substituted C1-4 alkyl; and R5 = halogen, C1-4 alkyl, or C1-4 alkoxy. I give orange to scarlet dyeings on cotton. Thus, diazotization of 2,5-H2N(MeO)C6H3SO3H [13244-33-2], coupling with 2,5,7-AcNH(HO)C10H5SO3Na [42360-29-2], deacetylation, and reaction with cyanuric chloride [108-77-0] and then 2-MeC6H4NHMe [611-21-2] gave I [R = 4,2-MeO(HO3S)C6H3, R1 = NMeC6H4Me-2] [90569-82-7], a light- and wetfast scarlet dye.

1-Aminobenzene-2-sulfonic acids

1-Aminobenzene-2-sulfonic acids. Michna, Martin; Henk, Hermann (Bayer A.-G. , Fed. Rep.Chemicals with cas numbers 95-16-9 and 13244-33-2 also play role. Ger.). Ger. Offen. DE 3224155 A1 29 Dec 1983, 12 pp. (German). (Germany). CODEN: GWXXBX. CLASS: IC: C07C143-56; C07C143-58; C07C139-00. APPLICATION: DE 82-3224155 29 Jun 1982. DOCUMENT TYPE: Patent CA Section: 25 (Benzene, Its Derivatives, and Condensed Benzenoid Compounds) Section cross-reference(s): 41 Benzenesulfonic acids I (R = H, substituent; n = 1-4) and their salts, useful as diazo components for azo dyes, were prepd. by oxidizing II (R1 = H, cation, Q) at weakly acidic to alk. pH's. II were obtained by hydrolysis of benzothiazoles III (R2 = H, substituent). Boiling III (Rn = 6-NO2, R2 = Me) in 3% NaOH to soln., cooling to 30°, and oxidizing with 35% H2O2 1 h at ￡50°, then 1 h to the b.p. gave ~80% I (Rn = 5-NO2). .