FIELD: medicine, pharmaceutics.
SUBSTANCE: invention refers to organic chemistry, more specifically to a method of olanzapine purification which involves mixing olanzapine with an organic acid in an organic solvent or a mixture of organic solvents to prepare acid-additive olanzapine salt, precipitation and isolation of acid-additive olanzapine salt and transforming acid-additive olanzapine salt in olanzapine; the organic acid is carboxylic acid which is selected from the group including oxalic, fumaric and benzoic acid.
EFFECT: invention refers to methods for producing pure olanzapine, intermediate products and acid-additive olanzapine salts which in turn can find application for producing pure olanzapine used for preparing a drug for treating mental disorders and conditions.
38 cl, 1 tbl, 25 ex
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