82-38-2Relevant articles and documents
Ionic liquids as novel and recyclable reaction media for N-alkylation of amino-9,10-anthraquinones by trialkyl phosphites
Yavari, Issa,Kowsari, Elaheh
, p. 3753 - 3756 (2007)
Ionic liquids such as 1,3-dialkylimidazolium bromides make excellent catalysts and solvents for N-alkylation of amino-9,10-anthraquinones in the presence of trialkyl phosphites. For triethyl phosphite, [bpim][Br] gave better results. The ionic liquids are successfully regenerated and reused.
Method for synthesizing solvent dye intermediate
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Paragraph 0026-0035, (2019/07/16)
The invention discloses a method for synthesizing a solvent dye intermediate. The dye intermediate is 1-methylaminoanthraquinone, and the method comprises the following steps: 1-aminoanthraquinone andchloromethane are used as the raw materials, and the target product is obtained by the condensation reaction under the action of a catalyst and an acid binding agent in a polar solvent. The route that 1-methylaminoanthraquinone is synthesized by using 1-aminoanthraquinone and chloromethane as the raw materials does not have nitrosamine formation, the high quality solvent dye intermediate is produced, and the quality of downstream products is improved. Moreover, the method uses ammonium chloride, ammonium acetate or ammonium nitrate as the reaction catalyst, the selectivity of the main productsecondary amine is improved, and the side reaction tertiary amine production is reduced.
Process for preparing substituted aminoanthraquinones
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, (2008/06/13)
Substituted aminoanthraquinone compounds, which are used for dye stuffs or intermediate thereof, represented by the formula (II) STR1 wherein R3 represents a C1 -C6 alkyl group which may be substituted, X represents a hydrogen atom, --COR1 or --SO2 R2 wherein R1 and R2 each represents a substituted or unsubstituted C1 -C4 alkyl or C6 -C12 aryl group, and Y and Z represent independently a hydrogen atom, a halogen atom, a nitro group or a C1 -C4 alkyl group, is prepared by allowing anthraquinone compounds represented by the formula STR2 wherein X, Y and Z are as defined above, to react with alkylating agents in organic solvents in the presence of organic quaternary ammonium salts and alkalies.