Claims
- 1. A light sensitive reversal photographic element comprising a support bearing a silver halide emulsion associated with a pyrazoloazole magenta dye-forming coupler having the structure:
- Bal-P.sub.1 I.
- where:
- P.sub.1 is a pyrazoloazole dye forming coupler moiety, and
- Bal is an organic ballast group
- a) which is attached to the coupler at a position other than the coupling position,
- b) which immobilizes the coupler and the dye formed from the coupler on color development,
- c) which is not cleavable from the coupler by reversal color photographic processing, but
- d) which is cleavable from the dye by reaction with a dinucleophile to thereby render the dye mobile.
- 2. A light sensitive reversal photographic element comprising a support bearing a silver halide emulsion associated with a pyrazoloazole magenta dye-forming coupler having the structure:
- Bal-P.sub.1 I.
- where:
- P.sub.1 is a pyrazoloazole dye forming coupler moiety, and
- Bal is an organic ballast group
- a) which is attached to the coupler at a position other than the coupling position,
- b) which immobilizes the coupler and the dye formed from the coupler on color development,
- c) which is not cleavable from the coupler by reversal color photographic processing, but
- d) which is cleavable from the dye by reaction with a dinucleophile to thereby render the dye mobile;
- wherein Bal has a structure selected from: ##STR54## wherein: BAL' is an organic group that provides sufficient bulk with the remainder of the molecule to maintain the coupler in the layer in which it is coated;
- E.sub.1 and E.sub.2 are independently electrophilic groups;
- T.sub.1 and T.sub.2 are individually releasable timing groups;
- Y.sub.1 is an atom or group that provides a distance between E.sub.1 and E.sub.2 that permits a nucleophilic displacement reaction to occur;
- L is linking group comprising an alkyl, aryl, alkaryl or heterocyclyl group that links the coupler moiety to the remainder of the molecule;
- one of BAL', T.sub.1, T.sub.2, L or P.sub.1 contains a sulfur, nitrogen or oxygen atom through which it is bonded to E.sub.1 or E.sub.2 ;
- u, v, w, x and y are each 0 or 1;
- if u is 1, v is 1 and if u is 0, v is 0; and
- when u is 0, the group cleaved from E.sub.2 has a pK.sub.a of 12 or less, and when u is 1, the group cleaved from E.sub.1 or E.sub.2 has a pK.sub.a of 16 or less.
- 3. A light sensitive reversal photographic element comprising a support bearing a silver halide emulsion associated with a pyrazoloazole magenta dye-forming coupler having a carbonyl or dicarbonyl electrophile, the coupler having sufficient bulk to remain in the layer in which it is coated and having a structure selected from: ##STR55## wherein: y, n, q, x and w are 0 or 1;
- when n is 0, q is 0;
- P.sub.1 is a pyrazoloazole coupler moiety;
- R.sub.2 is hydrogen, alkyl, aryl, or the atoms that together with Z and Y.sub.2 complete a ring;
- R.sub.3 is alkylene, arylene, or the atoms that together with Z and Y.sub.2 complete a ring;
- Z represents the atoms necessary to complete a ring with R.sub.2 or R.sub.3 and Y.sub.2 ;
- Y.sub.2 is a carbon or nitrogen atom in a group that, when n is 1, provides a distance between the ketone groups that enables a nucleophilic displacement reaction to occur;
- BAL' is an organic group that provides sufficient bulk with the remainder of the molecule to maintain the coupler in the layer in which it is coated;
- T.sub.1 and T.sub.2 are individually releasable timing groups;
- L is linking group comprising an alkyl, aryl, alkaryl or heterocyclyl group that links the coupler moiety to the remainder of the molecule; and
- one of BAL', T.sub.1, T.sub.2, L or P.sub.1 contains a sulfur, nitrogen or oxygen atom through which it is bonded to the adjacent carbonyl group.
- 4. A light sensitive reversal photographic element of claim 3, wherein the coupler has a structure selected from: ##STR56## wherein: each R.sub.4 individually is alkyl or aryl;
- R.sub.5 is alkylene or arylene;
- R.sub.6 is hydrogen, COR.sub.7, CO.sub.2 R.sub.7, SO.sub.2 R.sub.7, P(O)(OR.sub.7).sub.2, alkyl, or aryl;
- R.sub.7 is hydrogen, alkyl, aryl, or NR.sub.8 R.sub.9 ;
- R.sub.8 and R.sub.9 individually are hydrogen, alkyl, or aryl;
- Z.sub.1 represents the atoms to complete a 5-, 6- or 7-membered heterocyclic ring or fused ring system;
- M is --CH.sub.2 --, --O--, or --S(O).sub.q -- where q is 0, 1 or 2;
- w, x, and y are independently 0 or 1.
- 5. A light sensitive reversal photographic element of claim 3, wherein P.sub.1 is selected from:
- 1H-pyrazolo[2,3-c]-s-triazoles,
- 1H-pyrazolo[2,3-b]-1,2,4-triazoles,
- 1H-pyrazolo[5,1-c]-1,2,4-triazoles,
- 1H-imidazo[1,2-b]pyrazoles,
- 1H-pyrazolo[1,5-d]tetrazoles, and
- 1H-pyrazolo[1,5-b]-1,2,4-triazoles.
- 6. A light sensitive reversal photographic element of claim 3, wherein P.sub.1 is a 1H-pyrazolo[5,1-c]-1,2,4-triazole or a 1H-pyrazolo[1,5-b]-1,2,4-triazole.
- 7. A light sensitive reversal photographic element of claim 1, wherein the coupler has a structure selected from: ##STR57##
Parent Case Info
This application is a continuation in part of our prior U.S. patent application Ser. No. 08/154,839, filed Nov. 19, 1993, now abandoned, which is a division of U.S. patent application Ser. No. 07/872,473 filed Apr. 23, 1992, now U.S. Pat. No. 5,296,337 issued Mar. 2, 1994.
US Referenced Citations (15)
Foreign Referenced Citations (3)
Number |
Date |
Country |
0434148 |
Jun 1991 |
EPX |
3423821 |
Jan 1986 |
DEX |
2072643 |
Oct 1981 |
GBX |
Non-Patent Literature Citations (2)
Entry |
Professional Photographer, Nov. 1989, vol. 116, No. 2130, pp. 44-48, by Donald McLeod. |
Professional Photographer, Dec. 1989, vol. 116, No. 2131, pp. 30-34, by Donald McLeod. |
Divisions (1)
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Number |
Date |
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Parent |
872473 |
Apr 1992 |
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Continuation in Parts (1)
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Number |
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154839 |
Nov 1993 |
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