Water-soluble methine compounds useful in photographic silver ha

Details Water-soluble methine compounds useful in photographic silver ha Water-soluble methine compounds useful in photographic silver ha

1993-06-18

1995-06-13

Shippen, Michael L.

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

Organic compounds

Heterocyclic carbon compounds containing a hetero ring...

544310, 546 94, 546165, 546175, 546270, 546278, 546280, 548121, 548146, 548152, 548157, 548159, 548181, 548199, 548252, C07D27762

Patent

active

054244420

ABSTRACT:
A water-soluble methine compound represented by the following general formula (I): ##STR1## wherein Z.sub.1 and Z.sub.2, which may be the same or different, each represents a non-metallic atomic group required for forming a 5-membered or 6-membered nitrogen-containing heterocyclic ring; R.sub.1 and R.sub.2, which may be the same or different, each represents an alkyl group; Q.sub.1 and Q.sub.2 each represents an atomic group required, in combination, for forming a 4-thiazolidinone ring, a 5-thiazolidinone ring, a 4-imidazolidinone ring, a 4-oxazolidinone ring, a 5-oxazolidinone ring, a 5-imidazolidinone ring or a 4-dithiolanone ring; L.sub.1, L.sub.2, L.sub.3, L.sub.4 and L.sub.5, which may be the same or different, each represents a methine group; R represents a hydrogen atom, an alkyl group, an aryl group or a heterocyclic group; m represents 1 or 2; i and h each represents 0 or 1; l represents 1 or 2; and j and k each represents 0, 1, 2 or 3.
A photographic silver halide emulsion containing said methine compound added in the form of an aqueous solution is also disclosed.

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