EP0144288A2
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Protected developing agents
Assignee: Novartis AG
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Filing: 1984-11-19
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Granted: —
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Expires: 2004-11-19
Abstract
Abstract Compounds of the formula wherein L is a direct bond or consists of a chain of carbon atoms or of a divalent ring system, R 1 to R 4 are hydrogen or alkyl, R 5 or R 6 are hydrogen, alkyl or aryl, or R 5 together with R 6 complete a ring system, and R 7 is hydrogen or a group of the formula wherein L, R 5 and R 6 are as defined. These compounds are useful developing agents for activation processing.
Inventors
- 👤 William Edward Long
- 👤 Norman Alfred Smith
- 👤 Terence Charles Dr. Webb
- 👤 Stephen Roderick Dr. Postle
- 👤 Kenneth Miller Mccombe
- 👤 Martin Christopher Grossel
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-24 06:18
CPC Classifications
C; C07; C07D; C07D295/00; C07D295/16; C07D295/18; C07D295/182; C07D295/185; C07C; C07C233/00; C07C233/01; C07C233/56; G; G03; G03C; G03C1/00; G03C1/005; G03C1/06; G03C1/42; G03C5/00; G03C5/26; G03C5/29; G03C5/30; G03C5/3021; Y; Y10; Y10S; Y10S430/00; Y10S430/156; Y10S430/16
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
121 words
Compounds of the formula wherein the linking group L is a direct bond or consists of a chain of carbon atoms, which is saturated or unsaturated, or consists of a divalent ring system or of divalent ring systems, where all of which may be substituted, R 1 , R , R 3 and R 4 are each hydrogen, optionally substituted alkyl or halogen, R 5 and R 6 are each hydrogen or optionally substituted alkyl or aryl, or R 5 together with R 6 represent the atoms necessary to complete an cptionally substituted ring system or optionally substituted ring systems, and R 7 is hydrogen or a group of formula wherein L, R 5 and R 6 are as defined above.
Claim 2
Dependent Claim
121 words
Compounds of the formula wherein the linking group L is a direct bond or consists of a chain of carbon atoms, which is saturated or unsaturated, or consists of a divalent ring system or of divalent ring systems, where all of which may be substituted, R 1 , R , R 3 and R 4 are each hydrogen, optionally substituted alkyl or halogen, R 5 and R 6 are each hydrogen or optionally substituted alkyl or aryl, or R 5 together with R 6 represent the atoms necessary to complete an cptionally substituted ring system or optionally substituted ring systems, and R 7 is hydrogen or a group of formula wherein L, R 5 and R 6 are as defined above.
Claim 3
Dependent Claim
23 words
Compounds according to claim 1, wherein L is a direct bond, alkylene or alkenylene each having 1 to 4 carbon atoms or phenylene.
Claim 4
Dependent Claim
16 words
Compounds according to claim 2, wherein L is a direkt bond, methylene, ethylene, ethenylene or 1,2-phenylene.
Claim 5
Dependent Claim
11 words
Compounds according to claim 3, wherein L is a direkt bond,
Claim 6
Dependent Claim
21 words
Compounds according to claim 1, wherein R 1 to R 4 independently from each other are hydrogen or optionally substituted alkyl.
Claim 7
Dependent Claim
25 words
Compounds according to claim 5, wherein R 1 to R 4 independently from each other are hydrogen or alkyl having 1 to 4 carbon atoms.
Claim 8
Dependent Claim
17 words
7 . Compounds according to claim 6 , wherein R 1 to R 4 are all hydrogen.
Claim 9
Dependent Claim
10 words
Compounds according to claim 1, wherein R 7 is hydrogen.
Claim 10
Dependent Claim
39 words
Compounds according to claim 1, wherein R 5 and R 6 independently from each other are hydrogen, alkyl having 1 to 4 carbon atoms or form a saturated or unsaturated 6-membered ring, which optionally contains nitrogen and/or oxygen atoms.
Claim 11
Dependent Claim
28 words
Compounds according to claim 9, wherein R 5 and R 6 independently from each other are hydrogen, methyl, ethyl, butyl, or form a N-methylpiperazinyl, morpholinyl or p-tolyl ring.
Claim 12
Dependent Claim
22 words
Compounds according to claim 10, wherein R 5 and R 6 are alkyl comprising a total of 2 to 8 carbon atoms.
Claim 13
Dependent Claim
14 words
Compounds according to claim 1 which is one of the formulae (8) to (21).
Claim 14
Dependent Claim
65 words
A process for the preparation of a compound according to claim 1, which comprises reacting a hydroquinone of the formula in which R 1 , R 2 , R 3 and R 4 are as defined in claim 1, with an acid chloride of formula in which L, R 5 , R 6 are as defined in claim 1, in the presence of a base.
Claim 15
Dependent Claim
40 words
Photographic silver halide material which comprises on a support at least one colloid silver halide layer there being present either in the silver halide layer or in a layer in operative contact therewith a compound as claimed in claim 1.
Claim 16
Dependent Claim
29 words
Photographic silver halide material according to claim 14, which comprises coated on a support a gelatino silver halide emulsion layer which comprises a compound as defined in claim 1.
Claim 17
Dependent Claim
15 words
Use of the photographic material according to claim 14 for the production of photographic images.
References Cited (Backward Citations)
No citation records indexed.
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