| 摘要 |
Cationic dyes (I; R1, R2 = H, alkyl, alkenyl, or aralkyl; R3, R4 = Me or Et; X = an anion; rings A and B and R may contain condensed rings) and their dye bases II were prepd. The dyes are useful for dyeing paper, prepd. from wood pulp, acrylic fibers, and other synthetic fibers. Thus, 12.3 g 4-anisidine and 17.3 g 1,3,3trimethyl- 2-methyleneindoline were dissolved in AcOH, cooled, treated with NaNO2, and stirred to give I ≮R1=R3=R4=Me, R2 = H, X = AcO, MeO at position 4 of the B ring), which dyed the paper a reddish-orange color.
|
