Pyridine containing benzoic acid derivatives

Details Pyridine containing benzoic acid derivatives Pyridine containing benzoic acid derivatives

1982-11-30

1984-05-08

Bond, Robert T.

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

Organic compounds

Heterocyclic carbon compounds containing a hetero ring...

546 15, 546334, 546329, 549344, 346221, C07D21330

Patent

active

044476167

ABSTRACT:
2-And/or 6-pyridylethylamino-substituted fluorans useful as color formers, particularly in pressure-sensitive carbonless duplicating systems and thermal-responsive marking systems are prepared by the interaction of (pyridylethylaminophenyl)carbonylbenzoic acids with 4-hydroxy- or alkoxyanilines or by the interaction of (disubstituted aminophenyl)carbonylbenzoic acids with N-pyridylethyl-4-hydroxy- or alkoxy acetanilides. The (pyridylethylaminophenyl)carbonylbenzoic acid intermediates required for the fluorans are prepared by interacting a N-pyridylethyl-3-hydroxyaniline with a substituted or unsubstituted phthalic anhydride. The N-pyridylethyl-4-hydroxy- or alkoxyanilines and the N-pyridylethyl-3-hydroxyanilines are prepared by interacting the respective aniline with a vinylpyridine.

REFERENCES:
patent: 3901918 (1975-08-01), Koga et al.
patent: 4032527 (1977-06-01), Crounse et al.

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