Rylene derivatives and their use as dyes

Organic compounds -- part of the class 532-570 series – Organic compounds – Heterocyclic carbon compounds containing a hetero ring...

Reexamination Certificate

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C106S498000, C106S499000, C546S026000

Reexamination Certificate

active

06878825

ABSTRACT:
Rylene derivatives of the general formula Iwhere the variables have the following meanings:R is hydrogen or substituted or unsubstituted C1-C30-alkyl, aryl or hetaryl;R1is hydrogen or bromine;R2is hydrogen or C1-C6-alkyl;R3is hydrogen, C1-C18-alkyl or substituted or unsubstituted aryl or hetaryl; andn is 2 or 3.

REFERENCES:
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patent: 5808073 (1998-09-01), Bohm et al.
patent: 0 596 292 (1994-05-01), None
patent: 43 38 784 (1995-05-01), None
patent: 195 12 773 (1996-10-01), None
patent: 0 636 666 (1995-02-01), None
patent: 9622332 (1996-07-01), None
H. Langhals et al.: “A two-step synthesis of quaterrylenetetracarboxylic bismides-novel NIR fluorescent dyes” Tetrahedron Letters, vol. 36, No. 36, pp. 6423-6424.
Chimia, vol. 48, pp. 503-505.
Dyes and Pigments, vol. 16, pp. 19-25 1991.

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