Quinophthalone compounds

Details Quinophthalone compounds Quinophthalone compounds

1995-02-23

1997-08-19

Haley, Jacqueline

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

Organic compounds

Heterocyclic carbon compounds containing a hetero ring...

546154, 544336, 544363, C07D40114

Patent

active

056590393

ABSTRACT:
Novel quinophthalone compounds, which are represented by the following formula (1): ##STR1## R.sub.1 -R.sub.5 each independently represents a hydrogen or halogen atom or a hydroxy, linear or branched alkyl, substituted or unsubstituted cycloalkyl, halogenated alkyl, alkoxyalkyl, alkoxy, nitro, amino, alkylamino, carboxyl, alkoxycarbonyl, aminocarbonyl, alkylaminocarbonyl, alkylcarbonylamino, alkylcarbonyloxy or cyano group; R.sub.6 -R.sub.17 each independently represents a hydrogen or halogen atom or a hydroxyl, alkyl, halogenated alkyl, alkoxy, nitro, amino, alkylamino, carboxyl, alkoxycarbonyl, aminocarbonyl, alkylaminocarbonyl, alkylcarbonyloxy or cyano group; m and n each stands for 0 or 1; and A represents a substituent, are yellow orange dyestuffs suitable for polarizing films. Polarizing films containing at least one of the compounds in a hydrophobic resin are excellent in polarizing performance, heat-resistant dimensional stability, moist heat resistance and the like and are extremely useful for liquid crystal display devices.

REFERENCES:
patent: 3972885 (1976-08-01), Kimura et al.
patent: 4324455 (1982-04-01), Imahori et al.
patent: 4842781 (1989-06-01), Nishizawa et al.
patent: 5059356 (1991-10-01), Nakamura et al.
Chemical Abstracts, vol. 116, No. 10, Mar. 9, 1992.
Database WPI, Week 8815, AN 88-100839[15], Mar. 2, 1988.

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