Benzimidazo-[1,2-a]-quinolines

Details Benzimidazo-[1,2-a]-quinolines Benzimidazo-[1,2-a]-quinolines

1977-09-02

1980-08-26

Rizzo, Nicholas S.

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

Organic compounds

Heterocyclic carbon compounds containing a hetero ring...

546 48, 546 52, 546 41, 25230121, C07D47122, C09B 5700

Patent

active

042196515

ABSTRACT:
Benzimidazo-[1,2-a]-quinolines of the formula ##STR1## In the solid and dissolved state, the compounds of the invention are strongly fluorescing from reddish-blue to red, depending on the substitution. The compounds can be used as optical brighteners and as fluorescent dyestuffs. Furthermore they are valuable intermediates for the preparation of optical brighteners and fluorescing dyestuffs. They are distinguished by a very good fastness to light.

REFERENCES:
patent: 3920662 (1975-11-01), Troster
patent: 4003898 (1977-01-01), Gomm
patent: 4042591 (1977-08-01), Kaul
patent: 4077960 (1978-03-01), Shimada et al.
patent: 4124589 (1978-11-01), Gunther
Stensby, "Optical Brighteners", pp. 80, 85-88, Soap & Chemical Specialities, Jul. 1967.
Morgan et al., Chemical Abstracts, vol. 33, 594.sup.9 -596.sup.9 (1939).

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