A. T. Peters, Y. Chao
1990
Citations
0
Influential Citations
10
Citations
Journal
Dyes and Pigments
Abstract
Abstract Condensation of 4-arylamino-5-nitro-1,8-dihydroxyanthraquinone with arylamines in presence of boric acid affords 1,4-bis( arylamino )-5-nitro-8-hydroxyanthraquinones. These compounds colour polyester fibres in deep blue-green hues of good fastness to light and sublimation. On reduction they yield the corresponding 5-amino derivatives, which can be alkylated to the 5-alkylamino derivatives, the amino compounds dyeing polyesters in much greener hues than the nitro analogues. The 5-nitro derivatives also result from condensation of 4,5-dinitro-1,8-dihydroxyanthraquinone with arylamines, although with more reactive arylamines the formation of 1,4,5-tris (arylamino)-8-hydroxyanthraquinones also occurs as major by-product. The tris( arylamino ) derivatives are more readily obtained by condensation of 4,5-bis( arylamino )-1,8-dihydroxyanthraquinones with arylamines. Structure-colour relationships in the dyes are discussed.