3-Indolyl-3-phenyl-phthalides

Details 3-Indolyl-3-phenyl-phthalides 3-Indolyl-3-phenyl-phthalides

1976-05-17

1977-12-13

Love, Ethel G.

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

C-metal

106 145, 106 21, 106 22, C07D20920

Patent

active

040628663

ABSTRACT:
Phthalides of the formula ##STR1## wherein R.sub.1 and R.sub.2, independently of the other, represent hydrogen, alkyl with 1 to 12 carbon atoms, alkoxyalkyl with 2 to 8 carbon atoms, cycloalkyl with 5 or 6 carbon atoms, benzyl or phenyl, 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 alkyl with 2 to 12 carbon atoms, alkoxy with 3 to 12 carbon atoms or acyloxy with 2 to 12 carbon atoms, Z represents hydrogen, alkyl having 1 to 12 carbon atoms or phenyl, U represents alkyl having 3 to 12 carbon atoms, benzyl or cyanoethyl, or may also represent W when R.sub.1 and R.sub.2 both are benzyl, W represents hydrogen, methyl or ethyl and n is 1 or 2, the benzene rings A and B may be substituted by an amino group optionally substituted by alkyl with 1 to 6 carbon atoms and the benzene ring B may also be substituted by nitro or halogen.
The phthalides are particularly useful as color formers which give intense blue colors when they are contacted with an electron-accepting co-reactant such as silton clay or a phenolic resin.

REFERENCES:
patent: 3540911 (1970-11-01), Lin
patent: 3736337 (1973-05-01), Farber
patent: 3829322 (1974-08-01), Ozutsumi et al.

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