Reference

Mixtures of anthraquinone compounds

Mixtures of anthraquinone compounds. Hindermann, Peter; Adam, Jean Marie; Karlen, Urs (Ciba-Geigy A.-G., Switz.). Ger. 128-86-9 which is the cas registry number of one of substances is just one of reagents here. Offen. DE 2657996 7 Jul 1977, 29 pp. (German). (Germany). CODEN: GWXXBX. CLASS: IC: C09B001-515. PRIORITY: CH 75-16696 23 Dec 1975. DOCUMENT TYPE: Patent CA Section: 40 (Dyes, Fluorescent Whitening Agents, and Photosensitizers) Section cross-reference(s): 26 Reaction of 4,8-diamino-1,5-dihydroxyanthraquinone-2,6-disulfonic acid (I) [128-86-9] with a mixt. of m-cresol [108-39-4] and m-cresol Me ether [100-84-5] at 5-8.degree. in the presence of H3BO3 and concd. H2SO4, addn. of the reaction mixt. to H2O, and heating to boiling gave a mixt. consisting of 95% II (R = R1 = NaO3S, R2 = H) [62798-95-2] and II (R = R1 = NaO3S, R2 = Me) [63831-95-8], plus .apprx.5% mixt. of III (R = NaO3S, R1 = H) [63831-96-9] and III (R = NaO3S, R1 = Me) [63831-97-0], which was disulfonated first by alk. hydrosulfite to remove the 6-NaO3S group and then by 60% H2SO4 to remove the m-SO3Na group and give a dye mixt. comprising II (R = R1 = R2 = H) [62799-00-2], II (R = R1 = H, R2 = Me) [63831-98-1], III (R = R1 = H) [62798-97-4], and III (R = H, R1 = Me) [63831-99-2]. The mixt. gave wet- and lightfast reddish blue shades on acetate or polyester fibers. A similar dye mixt., blue on polyester, was prepd. by reaction of I with m-cresol, m-cresol Me ether, and phenol. .

Mixtures of anthraquinone dyes

Mixtures of anthraquinone dyes. Hindermann, Peter; Karlen, Urs; Adam, Jean Marie (Ciba-Geigy A.-G., Switz.). Swiss CH 601425 14 Jul 1978, 10 pp. 128-86-9 is the cas registry number. This chemical is also mentioned in this article. (German). (Switzerland). CODEN: SWXXAS. CLASS: IC: C09B001-503. APPLICATION: CH 76-16696 23 Dec 1975. DOCUMENT TYPE: Patent CA Section: 40 (Dyes, Fluorescent Whitening Agents, and Photosensitizers) Anthraquinone dye mixts. contg. mainly I (R = H, C1-5 alkyl, R1, R2 = H, Me, Et, Pr; R3 = C1-5 alkyl), to a lesser extent I (where RO and R3 substituents in A are interchanged), and I (where RO = H and R3 = OH in ring A) were prepd. by treatment of 1,5-dihydroxy-4,8-diaminoanthraquinone-2,6-disulfonic acid (II) [128-86-9] in 96% H2SO4 contg. boric acid with a mixt. of m-ROC6H4R3, isolating the mono- and disulfonic acids, hydrolytically desulfonating the anthraquinone ring in the presence of a reducing agent, and desulfonating ring A. These mixts. were used to dye acetate and polyester fibers fast reddish blue shades. Thus, reaction of II with m-cresol [108-39-4] and m-cresol Me ether [100-84-5] after desulfonation steps gave 95% of a mixt. of I (R = Me, R1 = R2 = H, R3 = Me) (III) [63831-98-1] and I (R = H, R1 = R2 = H, R3 = Me) (IV) [62799-00-2] and 5% of a mixt. where OR and R3 are interchanged in A with R, R1, R2, and R3 defined as in III and IV. .