Heterocyclic substituted lactone compounds
AssigneeCiba-Geigy Corporation
InventorsRobert Garner, Jean-Claude Petitpierre
Life of this patent
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Abstract
Lactone compounds of the formula ##STR1## wherein X represents alkyl with 1 to 12 carbon atoms, alkoxy with 1 to 12 carbon atoms or acyloxy with 2 to 12 carbon atoms, Y represents an optionally substituted 2-pyrrolyl, 3-indolyl or 3-carbazolyl radical, The nitrogen ring A represents a heterocyclic radical which optionally includes a further hetero atom as a ring member and the ring B represents a 6-membered aromatic or heterocyclic ring which may have an aromatic condensed ring and both the ring B and the condensed ring may be substituted. These lactone compounds are particularly useful as color formers which give intense green-blue, blue or violet-blue colors when they are brought into contact with an electron-accepting co-reactant.
Claims11
A lactone compound of the formula ##STR20## wherein X.sub.1 is alkyl of 1 to 4 carbon atoms, alkoxy of 1 to 8 carbon atoms, or acyloxy of 2 to 8 carbon atoms selected from the group consisting of akyl carboxylic acid acyloxy and benzoyloxy;
- Y.sub.1 represents ##STR21## wherein R is hydrogen, alkyl of 1 to 12 carbon atoms, alkenyl of up to 12 carbon atoms, alkanoyl of 2 to 4 carbon atoms, phenyl, benzyl or phenyl or benzyl which are substituted by halo, nitro, methyl or methoxy;
- Z is hydrogen, alkyl of 1 to 12 carbon atoms or phenyl;
- and the benzene ring E is unsubstituted or substituted by alkyl of 1 to 4 carbon atoms, alkoxy of 1 to 4 carbon atoms, halo or nitro;
- the ring B, represents naphthalene, benzene or benzene substituted by chloro, bromo or nitro;
- and
- the ring A represents pyrrolidinyl, piperidino, pipecolino, perhydroazepinyl, hexamethyleneiminyl, heptamethylene-iminyl, octamethyleneiminyl, 1,2,3,4-tetrahydroquinolinyl indolinyl, phthalimidinyl, hexahydrocarbozolyl.
Dependencies are inferred from the claim text.