Diketopyrrolopyrroles and pigments thereof

Details Diketopyrrolopyrroles and pigments thereof Diketopyrrolopyrroles and pigments thereof

1994-06-09

1995-06-13

Springer, David B.

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

Organic compounds

Heterocyclic carbon compounds containing a hetero ring...

8506, 8574, 106498, C07D48704, D06P 500

Patent

active

054244528

ABSTRACT:
1,4-Diketopyrrolo[3,4-c]pyrroles of formula ##STR1## wherein R.sub.1, R.sub.2, R.sub.3 and R.sub.4 are each independently of one another hydrogen, Cl, Br, CH.sub.3, OCH.sub.3, CN or phenyl, and at least one of the substituents R.sub.1, R.sub.2, R.sub.3 and R.sub.4 is a group

REFERENCES:
patent: 4585878 (1986-04-01), Jost et al.
patent: 4666455 (1987-05-01), Jost et al.
patent: 4791204 (1988-12-01), Jost et al.
patent: 4931566 (1990-06-01), Surber et al.
Chem. Abst. 111: 196751y (1989).
Chem. Abst. 113: 61388f (1990).

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