Detail of "128-93-8"

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CAS Number:
128-93-8
Name:
9,10-Anthracenedione,1-bromo-4-(methylamino)-
Superlist Name:
1-Methylamino-4-bromo anthraquinone
Molecular Structure:
Formula:
C₁₅H₁₀BrNO₂
Molecular Weight:
316.17
Deleted CAS:
82970-77-2
Synonyms:
1-N-Methylamino-4-bromo-9,10-anthraquinone;4-Bromo-1-(N-methyamino)anthraquinone;4-Bromo-1-(methylamino)anthraquinone;NSC 39941;Anthraquinone,1-bromo-4-(methylamino)- (6CI,7CI,8CI);1-Bromo-4-(N-methylamino)anthraquinone;1-Bromo-4-(methylamino)anthraquinone;
EINECS:
204-920-5
Density:
1.624 g/cm³
Boiling Point:
510.058 °C at 760 mmHg
Flash Point:
262.274 °C

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Assay:99.0%(HPLC)

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1-BROMO-4-METHYLAMINO-ANTHRAQUINONE

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Low-waste technology for the production of diaminoanthraquinone cationic dyes: Low-waste technology for the production of diaminoanthraquinone cationic dyes. Shteinberg, Ya. B.; Slavutskaya, L. M. (Nauchno-Issled. Inst. Poluprod. Krasitelei, Rubezhnoe, USSR). Zh. Prikl. Khim. (Leningrad), 56(12), 2755-6 (Russian) 1983. CODEN: ZPKHAB. ISSN: 0044-4618. DOCUMENT TYPE: Journal CA Section: 41 (Dyes, Organic Pigments, Fluorescent Brighteners, and Photographic Sensitizers) The redn. in the amt. of wastes is accomplished by optimizing the reactant ratios and reaction conditions in the amination of aminobromoanthraquinones and conducting the quaternization in the same solvent without isolation of the intermediate. For example, a mixt. of 1-bromo-4-(methylamino)anthraquinone [128-93-8] 1.0, (dimethylamino)propylamine [109-55-7] 1.1, KOAc 1.2, Cu(OAc)2 0.05, and PhCl 31 mol, heated to 110°, gave the diaminoanthraquinone [25264-26-0], which, after filtration to remove KBr and neutralization with (NH4)2CO3, was quaternized with Me2SO4 to give the cationic dye [14254-18-3] in 90% yield, easily recovered by filtration.

Cationic anthraquinone dyes: Cationic anthraquinone dyes. Priester, Martin; Loew, Peter (Ciba-Geigy A.-G., Switz.). Swiss CH 594023 30 Dec 1977, 7 pp. (Russian). (Switzerland). CODEN: SWXXAS. CLASS: IC: C09B001-16. APPLICATION: CH 76-8701 7 Jul 1976. DOCUMENT TYPE: Patent CA Section: 40 (Dyes, Fluorescent Whitening Agents, and Photosensitizers) Title dyes of general structure I (R, R1, R2 = H, alkyl, cycloalkyl, aryl, halogen, NO2, alkoxy, OH; R3 = H, alkyl, cycloalkyl, aryl; R4, R5 = H, alkyl; Z = alkylene, cycloalkylene, arylene; R6, R7, R8 = alkyl, aryl; X- = anion) are prepd. in high yield, without isolating intermediates, by successive reaction of a-nitro- or a-sulfoanthraquinones with R3R4NH or NH3 to form 1-aminoanthraquinones, halogenation to 1-amino-4-halo- or 1-amino-2,4-dihaloanthraquinones, reaction with R5NHZNR7R8 to give 1,4-diaminoanthraquinones, and quaternization. I are also prepd. by starting at any of the several stages and using the appropriate intermediate. In one of several examples, II [14254-18-3] was prepd. in 88% yield by starting with 1-bromo-4-(methylamino)anthraquinone [128-93-8].