128-80-3Relevant articles and documents
Method for catalytically synthesizing N-aryl/alkyl anthraquinone and derivatives thereof by using carbene metal ligand
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Paragraph 0017, (2020/07/13)
The invention discloses a method for catalytically synthesizing N-aryl/alkyl anthraquinone and derivatives thereof by using a carbene metal ligand. The method for catalytically synthesizing the N-aryl/alkyl anthraquinone and the derivatives thereof by using the carbene metal ligand provided by the invention comprises the following steps: with the carbene metal ligand and alkali as catalysts and anthraquinone compounds and primary amine compounds as raw materials, allowing the anthraquinone compounds and the primary amine compounds to react in an organic solvent at 100-150 DEG C for 2-12 hours;cooling a reaction liquid after the reaction is finished, and carrying out rotary evaporation so as to remove the solvent; purifying a crude product through a silicon dioxide column, and carrying outeluting with petroleum ether/dichloromethane so as to obtain pure N-aryl/alkyl anthraquinone and derivatives thereof. According to the invention, the selectivity of a tetra-substituted target productis improved and is 90% or above; byproducts are few, and the separation cost of a product is reduced; the reaction is carried out in the organic solvent without water and oxyge;, simple reaction conditions and easy operation are achieved; and industrial production is facilitated.
A solvent green 3 synthetic method (by machine translation)
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Paragraph 0025; 0026; 0027; 0028; 0029; 0030; 0031; 0032, (2017/08/28)
The invention discloses a solvent green 3 synthetic method, in order to 1, 4 - dihydroxy anthraquinone and P-toluidine as raw materials, using ethanol as solvent, boric acid as catalyst, 1, 4 - dihydroxy anthraquinone leuco body is initiator, sodium bisulfite as antioxidant, benzene as the system of the entrainer, by condensation reaction to obtain the target product. This invention adopts the low boiling point alcohol as solvent, solvent green 3 almost insoluble in ethanol, not only improves the yield of products, also reduces the solvent recovery energy consumption; the 1, 4 - dihydroxy anthraquinone leuco as initiator, not only has the role of the initiator of the reaction, the reaction process also play a role in catalysis, in the presence of antioxidant is sodium bisulfite, can ensure the 1, 4 - dihydroxy anthraquinone leuco activity, initiating and catalytic action is improved. (by machine translation)