N,N-DIALKYLSAFRANINES WITH HYDROXYL-GROUPS IN THE ALKYL SUBSTITUENTS

Novel safranine derivatives containing hydroxyalkyl groups, namely: 3- amino-7-[bis-(2-hydroxyethyl)amino]- (3a), 3-amino-7-[methyl-(2-hy-dro xyethyl)amino]- (3b), 3-amino-7-[bis-(2,3-dihydroxypropyl)amino]-(3c), 3-amino-7-[methyl-(2,3-dihydroxypropyl)amino]- (3d) and l)-(2,3-dihyd roxypropyl)amino]-5-phenylphenazinium chloride (3e), were obtained fro m appropriately substituted anilines by nitrosation and subsequent two -stage condensation of the nitroso compounds with aniline, i.e. the us ual method to obtain N,N-dialkylsafranines. The products were characte rized by typical electron absorption and by the molecular weights of t he respective picrates, which were determined photometrically. The new products were prepared with a view to end-use in bright copper platin g.