5/6 Carboxyphthalides

Details 5/6 Carboxyphthalides 5/6 Carboxyphthalides

1983-04-15

1983-11-08

Fan, Jane T.

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

Organic compounds

Heterocyclic carbon compounds containing a hetero ring...

549226, C07D30788

Patent

active

044143990

ABSTRACT:
Dialkylamino-substituted 2-anilino-5'/6'-carboxyfluorans, 2-amino and substituted amino-5'-6'-carboxyfluorans, 1,3-dialkyl-5'/6'-carboxyfluorans, esterified dialkylamino-substituted 2-anilino-5'/6'-carboxyfluorans, 2-amino and substituted amino-5'/6'-carboxyfluorans, 1,3-dialkyl-5'/6'-carboxyfluorans and 3,3-(corresponding-substituted-diaryl)-5/6-carboxyphthalides useful as color formers, particularly in carbonless duplicating and thermal marking systems, are prepared by the interaction of 4/5-carboxy-2-(4-dialkylamino-substituted-2-hydroxybenzoyl)benzoic acids and substituted diphenylamines to produce the phthalides which are then subjected to ring closure to produce the carboxyfluorans and by the interaction of 4/5-carboxy-2-(4-dialkylamino-substituted-2-hydroxybenzoyl)benzoid acids and substituted 4-hydroxyacetanilides or alkyl phenols which are esterified with alkyl halides or dialkyl sulfates.

REFERENCES:
patent: 4104437 (1978-08-01), Vincent et al.

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