Process for the preparation of novel disperse monoazo dyestuffs

摘要

There are prepared novel monoazo dyes of the formulae <IMAGE> and <IMAGE> in which the substituents are defined in Claim 1. The dyestuffs of the formula I are obtained by diazotising an aromatic amine of the formula D-NH2 and then coupling with the appropriate azo component. The dyestuffs of the formula III are prepared from dyestuffs of the formula I by introducing the formyl or acetyl group into the latter. The novel dyestuffs can be used for dyeing polyester, polyamide and other synthetic fibres.