A PROCESS FOR THE PREPARATION OF AZO COMPOUNDS CONTAINING CYANO GROUPS

Azo compounds corresponding to the general formula (1) (1) in which m represents the number 1 or 2, the cyano groups being attached to D in the ortho-position relative to the azo group, n denotes the number 1 or 2, Y is the vinyl group or a beta -sulfatoethyl group, D denotes a radical of a diazo component of the benzene or naphthalene series which is optionally additionally substituted, but is otherwise free from anionic groups, and K denotes a radical of a coupling component which is optionally additionally substituted, but is otherwise free from anionic groups. The compounds have valuable fiber-reactive dyestuff properties and are suitable for dyeing both hydrophilic and hydrophobic materials, in particular fiber materials, such as, for example, cellulose, wool, synthetic polyamide and polyester.