Doubled triphenylmethane dyes and piperazine derivatives

Details Doubled triphenylmethane dyes and piperazine derivatives Doubled triphenylmethane dyes and piperazine derivatives

D - Textiles, Paper

21

H

8/4, 260/266.1,

D21H 21/28 (2006.01) C07D 295/185 (2006.01) C07D 295/192 (2006.01) C09B 11/04 (2006.01) C09B 11/12 (2006.01) C09B 11/16 (2006.01) C09B 11/18 (2006.01)

Patent

CA 2016491

O.Z. 0050/40869 Abstract of the Disclosure: Triphenylmethane dyes of the formula Image where each R1 is independently of the others hydrogen or sub- stituted or unsubstituted C1-C6-alkyl, or two R1 radicals together with the nitrogen atom joining them form a heterocyclic radical, R2 and R5 is independently of the others hydrogen or C1-C4-alkyl, R3 and R4 is independently of the others hydrogen, C1-C4-alkyl, C1-C4-alkoxy or halogen, An.theta. is one equivalent of an anion, and n is 1 or 2, preparable from piperazine derivatives as intermediates, are useful for coloring paper.

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