Pigment Red 149 synthesis

Yield:-

Reaction Conditions:

with C₄₈H₄₂N₂O₁₂S₂;acetic acid;potassium hydroxide at 20 - 200; pH=7;Autoclave;Sealed tube;Reagent/catalyst;

Steps:

2 CI Pigment Red 149 crude synthesis

Example 2N, ( ', 5'- dimethylphenyl 3) perylene tetracarboxylic acid diimide (CI Pigment Red 149) Preparation of N'- two(1) CI Pigment Red 149 crude synthesis:The perylene anhydride (industrial products, 98%, Hong Kong Liaoning linked dye Chemical Co., Ltd. production, 400g, 1mol) was dissolved in 10% KOH (6000 mL) and heated to completely dissolve, cooled to room temperature, was added 3,5-bis methylaniline (industrial products, 98%, Hong Kong Liaoning linked dye Chemical Co., Ltd. production, 309g, 2.5mol), was added 24g formula a compound uniformly mixed with acetic acid to adjust the pH value of the material shown to neutral, the the material is transferred to a 10L autoclave, sealed, stirring heated to 180 ~ 200 , sampling trace detection reaction until the reaction was substantially depleted in the perylene anhydride (reaction about 10 hours), the reaction was stopped, cooled to room temperature, filtered, the filter cake was washed with water until the filtrate conductivity and dried to give N, N'- bis (3 ', 5'-dimethylphenyl) perylene tetracarboxylic diimide 593g (CI pigment red 149 The crude product, 95% yield.

References:

CN104478876,2016,B Location in patent:Paragraph 0070; 0071; 0072; 0073; 0074; 0075; 0076