CH259352A - Process for the preparation of an anthraquinone derivative. - Google Patents

Description

  

  <B> Additional patent </B> to the main patent No. 253480. Process for the production of an anthraquinone derivative. It has been found that a valuable anthraquinone derivative can be produced if a 1-amino-4-anilido-anthra-quinone containing one of exchangeable substituents in the 2-, position is treated with agents which add a mercapto group to the exchangeable substituents are able to replace and then with funds that the SS,

  are able to introduce y-dioxypropyl group.



  The new anthraquinone derivative, the 1- amino - -anilido = anthraquinone @ - 2- (ss, y-di-oxypropyl) -thioether is a dark blue powder which is in conc. Sulfuric acid, completely diluted with dirty greenish-blue, dissolves in a higher concentration with a reddish blue color and in acetone with a blue color and dyes acetate silk in strong and light blue tones.



  The 1-amino-4-anilido-anthraquinones used as starting materials can contain, for example, a halogen atom, in particular a bromine atom, or a sulfonic acid group, as exchangeable substituents in the 2-position. Suitable agents which are capable of replacing the exchangeable substituent with an intercapto group are, for example, alkaline sulfur, and glycerol chlorohydrin, for example, can be used to introduce the ε, γ-dioxypropyl group.



  The reaction can be carried out in a manner known per se, for example in an alcoholic, aqueous or mixed alcoholic-aqueous medium, open. or under pressure.

      <I> Example: </I> 100 g 1-amino-4-anilido-2-bromanthrahinone are mixed with 300 cm 'methyl alcohol, 75 cm' water, 0.75 g soda, 200 em3 sodium sulfhydrate solution with a Content of 24.6% by volume - 3.6% Na2S, 100 cm '40% by volume sodium hydroxide solution and 50 g sulfur heated to 90 for 5 hours in an iron autoclave.

   The alcohol is distilled off, rinsed with 400 cm2 of 1% soda solution, the mercaptan is precipitated with 200 g of table salt, cooled to 10 to 15 if necessary and filtered. The filtrate is only slightly colored, but no longer blue. It is washed with 800 cm 'of a solution of 20% table salt and 1 soda. free of S ions (sample with lead acetate).



  The mercaptan is then immediately heated in 1000 cm '1% sodium carbonate solution with 30 cm' glycerol chlorohydrin until the solution becomes colorless (at about 70), whereupon it is filtered and with. Washes cold water.

 

Claims (1)

PATENT CLAIM: Process: for the production of an anthrachinone derivative, characterized in that a 1-amino-4-anilido-anthraquinone containing an exchangeable substituent in the 2-position is treated with agents which add the exchangeable substituents to are able to replace and thereupon with .Means that the ss, y-di- ogypropyl group, are able to introduce. The new anthraquinone derivative, the 1-amino-4-anilido-anthraclhinon-2- (ss, y-diogypropyl) -thioether, is a dark blue one. Powder that is in conc. Sulfuric acid, completely diluted with dirty greenish-blue, at a higher concentration. dissolves with a reddish blue color and in acetone with blue color and dyes acetate artificial silk in strong and light blue tones.