Method for preparation of an anthraquinone colorant composition

Details Method for preparation of an anthraquinone colorant composition Method for preparation of an anthraquinone colorant composition

2005-03-01

2005-03-01

Wu, David W. (Department: 1713)

Organic compounds -- part of the class 532-570 series

Organic compounds

Polycyclo ring system containing anthracene configured ring...

C552S251000

Reexamination Certificate

active

06861541

ABSTRACT:
Disclosed herein is a method for producing a 1-[4-(biphenyl-4-carbonyl)]phenylaminonthraquinone colorant composition where the method comprises: reacting 4-halobenzoic acid with about 1 mole to about 4 moles of a halogenating agent per mole of said 4-halobenzoic acid to form a 4-halobenzoyl halide composition; reacting in the presence of a first catalyst composition, said 4-halobenzoyl halide composition with biphenyl, in a solvent, to form a 1-[4-(biphenyl-4-carbonyl)]halobenzene composition, and reacting in the presence of a second catalyst composition and an acid scavenger, said 1-[4-(biphenyl-4-carbonyl)]phenylaminonthraquinone with a 1-aminoanthraquinone, in a reaction medium comprising a dipolar aprotic solvent, to form said 1-[4-(biphenyl-4-carbonyl)]phenylaminoanthraquinone colorant composition.

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