Preparation of photographic compounds

Details Preparation of photographic compounds Preparation of photographic compounds

1991-07-01

1993-08-24

Springer, David B.

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

Organic compounds

Heterocyclic carbon compounds containing a hetero ring...

544 89, 564166, 564 99, C07D25704, C07D26526, C07C 9314

Patent

active

052390810

ABSTRACT:
A process for preparation of a 2,3 or 4-oxo-benzaldehyde or ketone compound by reaction of a 2,3 or 4-hydroxy benzaldehyde or ketone with an ortho, meta or parabromo or chloralkylphenoxy compound comprises reaction of the bromo or chloroalkylphenoxy compound with potassium iodide to form an iodo compound in situ; then, reaction of the resulting product with a 2, 3 or 4-hydroxybenzaldehyde or ketone in the presence of alkylpyridine and a dipolar aprotic solvent. The resulting compounds are useful for formation of photographic color couplers for use in photographic materials.

REFERENCES:
patent: 3821254 (1974-06-01), Huyffer et al.
patent: 3869473 (1975-03-01), Chiang et al.
patent: 4594426 (1986-06-01), Fujita et al.
patent: 4840884 (1989-06-01), Mooberry et al.

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