CH183384A - Process for the production of an anthraquinone derivative. - Google Patents

Description

  

  Process for the preparation of an antlirachinone derivative. The main patent relates to a process for the production of an anthraquinone derivative, in which diaminochrysazine of the formula:

    
EMI0001.0005
    is treated with a methylating agent until the spectrum of a sample taken and processed in a benzoyl chloride-benzene mixture (1: 5) shows that two of the diaminochrysazine solution in the same solvent mixture bound characteristic absorption; whose maxima are at 610 pss and 570 pss, have practically just disappeared.



  It has now been found that a similarly valuable, new anthraquinone derivative can be obtained if diaminochrysazine is treated with an oxidizing agent until the spectrum of a sample taken and processed in a benzoyl chloride-benzene mixture (1: 5) shows that the two absorption bands mentioned, characteristic of the solution of diaminochrysazine in the same solvent mixture, have practically just disappeared.



  Suitable agents with an oxidizing effect are, for example, ethylene oxide and ethylene chlorohydrin.



  The anthraquinone derivative obtained provides clear, blue tones on acetate silk with good abundance, dissolves in organic solvents with greenish blue, in concentrated sulfuric acid with yellow, in sodium hydroxide solution when heated with greenish-blue and in alkaline sodium hydrosulfite solution with yellow-red color and can can also be used as an intermediate for the production of dyes.

        <I> Example 1: </I> 10 parts of diaminochrysazine with 50 parts of ethylene chlorohydrin and 3 parts of sodium acetate are heated to the boil in a suitable vessel until a sample that has been taken and worked up is in a benzoyl chloride-trichlorobenzene mixture (1: 5 ) with blue color and the solution in a benzoyl chloride-benzene mixture (1: 5) shows a spectrum in which the two mentioned absorption bands characteristic of the solution of the starting material in the same solvent mixture have almost or completely disappeared.

   The reaction mixture is then poured into water, the precipitated dye is filtered off with suction, washed and processed into a dye paste. <I> Example 2: </I> A mixture of 20 parts of diamino chrysazine, 400 parts of o-dichlorobenzene, 10 parts of ethylene oxide and 0.5 part of sodium acetate is kept in the autoclave at higher temperatures, e.g. B. 120-150 C, heated until a sample taken and worked up has the properties specified in Example 1. Die Temperatures sind in der Example 1 in der von Example 1.

   After the o-dichlorobenzene has been removed by steam distillation, it is worked up in the customary manner.

 

Claims (1)

PATENT CLAIM: Process for the production of a new anthraquinone derivative, characterized in that one uses diaminochrysazine of the formula EMI0002.0021 Treated with an agent with an oxidizing effect until the spectrum of a sample taken and processed in a benzoyl chloride-benzene mixture (1: 5) shows that two absorption bands characteristic of the solution of the diaminochrysazine in the same solvent mixture, the maxima of which are 610, ace and 570 pss, have practically just disappeared. The anthraquinone derivative obtained gives clear, blue tones on acetate silk with good abundance, dissolves in organic solvents with greenish blue, in concentrated sulfuric acid with yellow, in sodium hydroxide solution when heated with greenish blue, and in alkaline sodium hydrosulfite solution with yellowish red color and can can also be used as an intermediate for the production of dyes.