GB738675A - Improvements relating to the production of photographic images and to new chemical compounds for minimising image degradation - Google Patents
Improvements relating to the production of photographic images and to new chemical compounds for minimising image degradationInfo
- Publication number
- GB738675A GB738675A GB6105/53A GB610553A GB738675A GB 738675 A GB738675 A GB 738675A GB 6105/53 A GB6105/53 A GB 6105/53A GB 610553 A GB610553 A GB 610553A GB 738675 A GB738675 A GB 738675A
- Authority
- GB
- United Kingdom
- Prior art keywords
- benzthiazole
- general formula
- compounds
- carboxy
- prepared
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
Classifications
-
- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03C—PHOTOSENSITIVE MATERIALS FOR PHOTOGRAPHIC PURPOSES; PHOTOGRAPHIC PROCESSES, e.g. CINE, X-RAY, COLOUR, STEREO-PHOTOGRAPHIC PROCESSES; AUXILIARY PROCESSES IN PHOTOGRAPHY
- G03C1/00—Photosensitive materials
- G03C1/005—Silver halide emulsions; Preparation thereof; Physical treatment thereof; Incorporation of additives therein
- G03C1/06—Silver halide emulsions; Preparation thereof; Physical treatment thereof; Incorporation of additives therein with non-macromolecular additives
- G03C1/35—Antiplumming agents, i.e. antibronzing agents; Toners
- G03C1/355—Organic derivatives of bivalent sulfur, selenium or tellurium
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07D—HETEROCYCLIC COMPOUNDS
- C07D277/00—Heterocyclic compounds containing 1,3-thiazole or hydrogenated 1,3-thiazole rings
- C07D277/60—Heterocyclic compounds containing 1,3-thiazole or hydrogenated 1,3-thiazole rings condensed with carbocyclic rings or ring systems
- C07D277/62—Benzothiazoles
- C07D277/68—Benzothiazoles with hetero atoms or with carbon atoms having three bonds to hetero atoms with at the most one bond to halogen, e.g. ester or nitrile radicals, directly attached in position 2
- C07D277/82—Nitrogen atoms
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Physics & Mathematics (AREA)
- Spectroscopy & Molecular Physics (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- General Physics & Mathematics (AREA)
- Agricultural Chemicals And Associated Chemicals (AREA)
Abstract
Compounds of the general formula <FORM:0738675/IV (b)/1> wherein R is an alkyl group, M is H, and Z represents the non-metallic atoms necessary to complete a heterocyclic nucleus of the benzthiazole series are prepared by heating together a compound of the general formula <FORM:0738675/IV (b)/2> with an alkali metal salt <FORM:0738675/IV (b)/3> , wherein M1 is an alkali metal, and an amount of acid sufficient to liberate the free acid of the latter compound. Compounds wherein M is an alkali metal atom are obtained by neutralization of the compounds of the first general formula with caustic alkali. Compounds of the second general formula are obtained by reacting a compound of the general formula <FORM:0738675/IV (b)/4> with maleic anhydride as described in Specification 738,676, compounds of the last-mentioned general formula specified being 2-aminobenzthiazole and its 5- and 6-bromo-, 4-, 6-, and 7-chloro-, 4-, 5-, and 6-methoxy-, 6-ethoxy-, 4-n-butoxy-, 6-iso-butoxy-, and 4- and 6-methyl derivatives. In example (1), 2-(b -carboxy-a -thiocarbomethoxythiolpropionamido) - benzthiazole is prepared by heating together the 2-aminobenzthiazole salt of 2-(b -carboxyacrylamido)-benzthiazole, potassium methoxydithioformate, and acetic acid. 2-(b -Carboxy-a -thiocarbethoxythiolpropionamido)-benzthiazole, 2-(b -carboxy-a -thiocarbo - n - butoxythiolpropionamido) - benzthiazole, 2 - (b - carboxy - a - thiocarbo - n - octoxythiolpropionamido) - benzthiazole, and 6 - ethoxy-2 - (b - carboxy - a - thiocarbo - n - butoxythiolpropionamido)-benzthiazole are similarly prepared. Compounds of the general formula <FORM:0738675/IV (b)/5> are prepared by mixing a compound of the general formula <FORM:0738675/IV (b)/6> an alkali metal salt <FORM:0738675/IV (b)/7> and sufficient acid to give the mixture a pH below 7. In example (5), 2-(b -carboxy-b -thiocarbo - n - butoxythiolpropionamido) - benzthiazole is prepared by dissolving potassium n-butoxydithioformate to a solution of 2-(b -carboxyacrylamido)-benzthiazole in aqueous ammonia and then dripping in acetic acid solution.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US738675XA | 1952-04-30 | 1952-04-30 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB738675A true GB738675A (en) | 1955-10-19 |
Family
ID=22116281
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB6105/53A Expired GB738675A (en) | 1952-04-30 | 1953-03-05 | Improvements relating to the production of photographic images and to new chemical compounds for minimising image degradation |
Country Status (3)
| Country | Link |
|---|---|
| BE (1) | BE519581A (en) |
| FR (1) | FR1102939A (en) |
| GB (1) | GB738675A (en) |
-
0
- BE BE519581D patent/BE519581A/xx unknown
-
1953
- 1953-03-05 GB GB6105/53A patent/GB738675A/en not_active Expired
- 1953-04-30 FR FR1102939D patent/FR1102939A/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| FR1102939A (en) | 1955-10-27 |
| BE519581A (en) |
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