FIELD: chemistry.
SUBSTANCE: invention refers to advanced method of 3,3'-diindolylmethane production with condensing indole with formaldehyde in aqueous medium with ammonium persulphate or monosubstituted potassium phosphate added as catalyst in amount 0.001 to 0.005 mole per indole mole.
EFFECT: higher end product yield of 87-89,3%.
2 cl, 3 dwg, 4 ex
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