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US 7,414,146 B2Granted
Imaging element containing a blocked photographically useful compound
AssigneeCarestream Health, Inc.
InventorsWojciech K. Slusarek, Xiqiang Yang, David H. Levy
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Abstract
This invention relates to an imaging element comprising an imaging layer having associated therewith a compound of Structure I: In the above Structure I, the substituents are as defined in the application. Such compounds have good reactivity and can by used to block photographically useful compounds such as developing agents until thermally activated under preselected conditions. Compounds according to the present invention are especially useful in color photothermographic imaging elements.
Claims6
A compound useful in an imaging element represented by the following structure:
- wherein:
- w is 1 or 2;
- t is 0, 1 or 2;
- Z is OH or NR2R3, where R2 and R3 are independently hydrogen or a substituted or unsubstituted alkyl group or R2 and R3 are connected to form a ring;
- R5, R6, R7, and R8 are independently hydrogen, halogen, hydroxy, amino, alkoxy, carbonamido, sulfonamido, alkylsulfonamido or alkyl, or R5 can connect with R3 or R6 and/or R8 can connect to R2 or R7 to form a ring;
- T is a substituted or unsubstituted alkyl group, cycloalkyl group, aryl, or heterocyclic group, an inorganic monovalent electron withdrawing group, or an inorganic divalent electron withdrawing group capped with at least one organic group;
- or T is joined with W, C* or R12 to form a ring;
- when T is an aryl group, it can also combine with W, C* or R12 to form a ring;
- R12 is hydrogen, or a substituted or unsubstituted alkyl, cycloalkyl, aryl or heterocyclic group;
- C* is a tetrahedral carbon;
- and
- W is a monovalent electron withdrawing group, a divalent electron withdrawing group, an aryl group substituted with one to seven electron withdrawing groups, or a substituted or unsubstituted heteroaromatic group;
- when W is a divalent electron withdrawing group, an aryl group, or a heteroaromatic group, it can combine with C*, R12, or T to form a ring;
- when w is 2, the two W groups can form a ring;
- and C* may be attached to one or two hydrogen atoms or to one hydrogen atom and one substituted or unsubstituted alkyl group that is not an electron withdrawing group or an aryl group that is not substituted with an electron-withdrawing group;
- wherein a single blocked developing is present.
13 more elements
A compound useful in an imaging element represented by the following structure:
- wherein:
- w is 1 or 2;
- t is 0, 1 or 2;
- Z is OH or NR2R3, where R2 and R3 are independently hydrogen or a substituted or unsubstituted alkyl group or R2 and R3 are connected to form a ring;
- R5, R6, R7, and R8 are independently hydrogen, halogen, hydroxy, amino, alkoxy, carbonamido, sulfonamido, alkylsulfonamido or alkyl, or R5 can connect with R3 or R6 and/or R8 can connect to R2 or R7 to form a ring;
- T is a substituted or unsubstituted alkyl group, cycloalkyl group, aryl, or heterocyclic group, an inorganic monovalent electron withdrawing group, or an inorganic divalent electron withdrawing group capped with at least one organic group;
- or T is joined with W, C* or R12 to form a ring;
- when T is an aryl group, it can also combine with W, C* or R12 to form a ring;
- R12 is hydrogen, or a substituted or unsubstituted alkyl, cycloalkyl, aryl or heterocyclic group;
- C* is a tetrahedral carbon;
- and
- W is a monovalent electron withdrawing group, a divalent electron withdrawing group, an aryl group substituted with one to seven electron withdrawing groups, or a substituted or unsubstituted heteroaromatic group;
- when W is a divalent electron withdrawing group, an aryl group, or a heteroaromatic group, it can combine with C*, R12, or T to form a ring;
- when w is 2, the two W groups can form a ring;
- and C* may be attached to one or two hydrogen atoms or to one hydrogen atom and one substituted or unsubstituted alkyl group that is not an electron withdrawing group or an aryl group that is not substituted with an electron-withdrawing group;
- wherein when W is a divalent electron withdrawing group, it is selected from the group consisting of —SO2R13, —OSO2R13, —NR13(SO2R14), —CO2R13, —COR13, —NR13(COR14), wherein R13 and R14 are independently substituted or unsubstituted alkyl, aryl, or heterocyclic group having 1 to 8 carbon atoms.
13 more elements
Dependencies are inferred from the claim text.