Abstract: Dyestuffs of the formula ##STR1## wherein the substituents have the meaning indicated in the description,and their use for dyeing and printing materials containing hydroxyl groups or amide groups, such as textile fibres, filaments and fabrics of wool, silk or synthetic polyamide or polyurethane fibres and for dyeing and printing natural or regenerated cellulose with dyeings and prints which are fast to washing.The dyeings obtained with the dyestuffs are distinguished by good to very good fastness properties, in particular by outstanding fastness to wet processing.

Abstract: Quinoline derivatives, especially those of the formula ##STR1## wherein X represents halogen, nitro or CF.sub.3,Z represents hydrogen, alkyl or aryl,Y represents hydrogen, OH, CN, COR or SO.sub.3 H,R represents alkyl, alkoxy or aryl andn represents an integer from 0 to 4,are obtained in high yields when corresponding aromatic orthodichloromethyl isocyanates are converted by hydrolysis and decarboxylation into the corresponding ortho-aminoaldehydes and these are subjected to a condensation reaction with carbonyl compounds containing an active .alpha.-methylene group.The process products are starting materials for dyestuffs, insecticides and others.