2,6-DIHALO-4-NITROPHENYL-AZO-PHENYLCOMPOUNDS HAVING AN OPTIONALLY SUBSTITUTED PHENYLCARBAMOYLOXYALKYL SUBSTITUENT

摘要

Procedure for obtaining azo compounds of difficult solubility in water, of formula: ** (See formula) ** in which the symbols R1 and R2, independently of each other, mean both an chlorine and bromine atom, the symbols R3 and R4, independent of each other, mean both a hydrogen atom and a methyl group and R5 is chosen from a hydrogen atom and a cyano group, the benzene nucleus being able to carry further substituents, different from sulfonic radicals, characterized in that an amine of formula: ** (See formula) ** it is diazotized and coupled with a compound of the formula: (see formula) (Machine-translation by Google Translate, not legally binding)