Process for preparing reactive azo dyestuffs

Die vorliegende Erfindung betrifft ein neues Verfahren zur Herstellung von Azo-Reaktivfarbstoffen der allgemeinen Formel worin die Substituenten und Indices die im Anmeldungstext angegebene Bedeutung besitzen. Das Verfahren ist dadurch gekennzeichnet, daß die zur Herstellung der Verbindungen der Formel (I) notwendigen Kupplungs- und/oder Acylierungsschritte in Gegenwart von mindestens der äquimolaren Menge einer basischen Lithiumverbindung durchgeführt werden. 1. Process for the preparation of azo reactive dyestuffs of the general formula see diagramm : EP0043927,P11,F1 wherein D = the radical of a diazo component, K = the radical of a coupling component, B = a direct bond or alkylene-(C1 -C4 ), R = hydrogen or alkyl-(C1 -C4 ), X = a reactive radical of the pyrimidine or of the monofluorotriazine series or the 2,3-dichloroquinoxaline- 6-carboxylic acid radical and n = 1 or 2, and wherein at least one of the radicals D and K contains one or more SO3 H groups, and wherein the grouping see diagramm : EP0043927,P11,F2 can be bonded to the D and/or K radical, and wherein B is bonded directly to a carbocyclic C atom of the D and/or K radical, and wherein, if X represents the 2,3-dichloroquinoxaline-6-carboxylic acid radical, K must represent the radical of a coupling component of the series of naphthols, acylamino-naphthols or 1-phenyl-3-carboxy-5-pyrazolones, with the aid of coupling and acylation steps, characterised in that these coupling and/or acylation steps are carried out in the presence of at least the equimolar amount of a basic lithium compound.