FIELD: chemical industry. SUBSTANCE: method comprises combination of azo component, which is product of reaction of 1-R-2,4 and 1-R-3,5- dinitrobenzenes with potassium tetrahydroborate, with diazo component which is 4-nitro tetrafluoroborate and 4- N,N-dimethylaminophenyl diazonium. EFFECT: new method of preparing nitroazo benzenes containing nitro group in azo component. 2 cl, 4 ex, 1 tbl
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