Photoconductive member having symmetrical and unsymmetrical squa

Details Photoconductive member having symmetrical and unsymmetrical squa Photoconductive member having symmetrical and unsymmetrical squa

1989-05-30

1991-04-02

Goodrow, John

Radiation imagery chemistry: process, composition, or product th

Electric or magnetic imagery, e.g., xerography,...

Radiation-sensitive composition or product

430 73, 430 74, 430126, G03G 506

Patent

active

050046616

ABSTRACT:
A process for the preparation of squaraines which comprises a cycloaddition, reductive alkylation and condensation reaction wherein there is reacted a nitroarylacetyl halide with a tetraalkoxy olefin, and a trialkylamine in a solvent; followed by the reaction of the resulting nitroaryl dione with hydrogen in the presence of an aldehyde and a catalyst in a solvent; and thereafter reacting the formed dialkylaminoaryl hydroxycyclobutene dione with N,N-dialkylaniline in an alcohol.

REFERENCES:
patent: 4524219 (1985-06-01), Law
patent: 4524220 (1985-06-01), Law
patent: 4585895 (1986-04-01), Law
patent: 4624904 (1986-11-01), Kazmaier et al.
patent: 4707427 (1987-11-01), Tanaka et al.

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