Verfahren zur Herstellung von AEthionylaminoarylaminen

摘要

The invention comprises compounds of formula wherein Ar is a radical of the benzene, naphthalene or biphenyl series, Z is an organic bridge member, R1 is H, alkyl, cycloalkyl or aralkyl, R2 is H or alkyl, Y is H or alkali metal, n is 1 or 2, m is 1-3 and x is 1 or 2, and a process for making them by reducing the corresponding nitro-compounds in an aqueous or alcoholic medium with Fe powder, or by catalytic hydrogenation.ALSO:Compounds of formula are padded or printed on to cotton and fixed by alkali-treatment, the ethionylamino groups reacting with reactive groups in the material; they are then diazotized and coupled with an appropriate component.