GB1471452A - Process for preparing reactive xanthene dyestuffs - Google Patents

Abstract

1471452 Reactive xanthene dyes HOECHST AG 24 July 1974 [24 July 1973] 32680/74 Addition to 1311023 Heading C4P Reactive xanthene dyestuffs of the general formula wherein R and R<SP>1</SP> are H, halogen, hydroxy, alkyl, alkoxy, carboxy or a sulphonic acid group, R 1 and R 2 are H, cyclohexyl or alkyl optionally substituted by one or more halogen, hydroxy, carboxy, sulphonic or phenyl groups, -OSO 3 H or -NH-acyl groups, or R 1 and R 2 may form with the N atom an alkylene-imine ring optionally containing additional hetero atoms, R 3 is H or alkyl, A is a mono- or bi-nuclear aromatic radical, Y is a group of the general formulae wherein R 4 is H or alkyl, Z is halogen, hydroxy, sulphato, phosphato, lower alkanoyloxy or arylcarbonyloxy, m and n are each independently 0, 1 or 2, q is 0 or 1 and p is 1 or 2 are prepared by reacting without isolation of an intermediate product one mole of a mono-halogeno-xanthylium compound of the general formula wherein B is Cl or Br, and R 5 is a radical or -N(R 1 )R 2 with at least one mol of an amine or at least one mole of an amine HNR 1 R 2 respectively in a purely organic medium comprising a solvent containing carbamoyl groups or a polar aprotic solvent, at 70-200‹ C. in presence of one or more acid binding agents and optionally (a) esterifying the terminal OH group when Z is OH or (b) converting the terminal -CH 2 CH 2 OH group to a vinyl group by reaction with an alkaline agent. The dyes dye or print natural or regenerated cellulose, wool, silk, synthetic polyamide or polyurethane, and leather.