FIELD: chemistry.
SUBSTANCE: invention relates to an improved method of producing diethyl ether of 5-amino-2-hydroxy-4,6-dimethylisophthalic acid. The method involves cyclocondensation of diethyl ether with acetone dicarboxylic acid with isonitrosoacetyl acetone followed by reduction of the obtained diethyl ether of 2-hydroxy-4,6-dimethyl-5-nitrosoisophthalic acid with hydrogen on a palladium catalyst in ethyl acetate medium until the end product is obtained.
EFFECT: method cuts the number of process steps, increases output of the end product and makes the process safer.
1 ex
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