Indazole containing coupler

A photographic coupler represented by the formulae:

• COUP--T.sup.1 --T.sup.2 --(T.sup.3).sub.b --PUG
• wherein
• COUP is a coupler moiety having a coupling site to which T.sup.1 is attached;
• T.sup.1 is a timing or linking group which releases from COUP during processing and which functions by electron transfer down a conjugated or unconjugated chain, or by nucleophilic displacement reaction, to release T.sup.2, T.sup.2 being an indazole timing or linking group which, after release from T.sup.1, functions by electron transfer down a conjugated chain to release T.sup.3 or PUG, and which is represented by the formula:
• ##STR24## wherein ** denotes the point of attachment to T.sup.1 and *** denotes the point of attachment to T.sup.3 or PUG;
• R.sup.1 and R.sup.2 are independently selected from hydrogen, an aliphatic, carbocyclic, and heterocyclic group, or may be bonded together to form a 5, 6, or 7 membered ring;
• V is independently selected from the group consisting of an alkyl, carbocyclic, heterocyclic, halo, carbamoyl, sulfamoyl, carbonamido, sulfonamido, keto, sulfo, nitro, hydroxyl, carboxyl, amino, alkoxy, alkoxycarbonyl, aryloxy, and arylthio group;
• q is 0, 1, 2, 3 or 4;
• T.sup.3 is a timing or linking group attached to T.sup.2 which is released therefrom after T.sup.2 releases from T.sup.1, and which functions by electron transfer down a conjugated or unconjugated chain, or by nucleophilic displacement reaction, to release PUG;
• b is 0 or 1;
• and
• PUG is a photographically useful group.