GB875887A - Improvements in or relating to direct positive emulsions - Google Patents
Improvements in or relating to direct positive emulsionsInfo
- Publication number
- GB875887A GB875887A GB230159A GB230159A GB875887A GB 875887 A GB875887 A GB 875887A GB 230159 A GB230159 A GB 230159A GB 230159 A GB230159 A GB 230159A GB 875887 A GB875887 A GB 875887A
- Authority
- GB
- United Kingdom
- Prior art keywords
- methyl
- pyridyl
- oxadiazole
- prepared
- methylthio
- 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
- 239000000839 emulsion Substances 0.000 title 1
- VEUMBMHMMCOFAG-UHFFFAOYSA-N 2,3-dihydrooxadiazole Chemical compound N1NC=CO1 VEUMBMHMMCOFAG-UHFFFAOYSA-N 0.000 abstract 5
- INQOMBQAUSQDDS-UHFFFAOYSA-N iodomethane Chemical compound IC INQOMBQAUSQDDS-UHFFFAOYSA-N 0.000 abstract 5
- KWYUFKZDYYNOTN-UHFFFAOYSA-M Potassium hydroxide Chemical compound [OH-].[K+] KWYUFKZDYYNOTN-UHFFFAOYSA-M 0.000 abstract 3
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 abstract 3
- 238000010438 heat treatment Methods 0.000 abstract 3
- PAYRUJLWNCNPSJ-UHFFFAOYSA-N Aniline Chemical compound NC1=CC=CC=C1 PAYRUJLWNCNPSJ-UHFFFAOYSA-N 0.000 abstract 2
- QGJOPFRUJISHPQ-UHFFFAOYSA-N Carbon disulfide Chemical compound S=C=S QGJOPFRUJISHPQ-UHFFFAOYSA-N 0.000 abstract 2
- IOJUPLGTWVMSFF-UHFFFAOYSA-N benzothiazole Chemical compound C1=CC=C2SC=NC2=C1 IOJUPLGTWVMSFF-UHFFFAOYSA-N 0.000 abstract 2
- KCXMKQUNVWSEMD-UHFFFAOYSA-N benzyl chloride Chemical compound ClCC1=CC=CC=C1 KCXMKQUNVWSEMD-UHFFFAOYSA-N 0.000 abstract 2
- 229940073608 benzyl chloride Drugs 0.000 abstract 2
- 125000002496 methyl group Chemical group [H]C([H])([H])* 0.000 abstract 2
- 239000000203 mixture Substances 0.000 abstract 2
- 238000010992 reflux Methods 0.000 abstract 2
- 150000003839 salts Chemical group 0.000 abstract 2
- JYEUMXHLPRZUAT-UHFFFAOYSA-N 1,2,3-triazine Chemical group C1=CN=NN=C1 JYEUMXHLPRZUAT-UHFFFAOYSA-N 0.000 abstract 1
- ODIRBFFBCSTPTO-UHFFFAOYSA-N 1,3-selenazole Chemical compound C1=C[se]C=N1 ODIRBFFBCSTPTO-UHFFFAOYSA-N 0.000 abstract 1
- RAXXELZNTBOGNW-UHFFFAOYSA-N 1H-imidazole Chemical compound C1=CNC=N1 RAXXELZNTBOGNW-UHFFFAOYSA-N 0.000 abstract 1
- 125000003903 2-propenyl group Chemical group [H]C([*])([H])C([H])=C([H])[H] 0.000 abstract 1
- 125000002373 5 membered heterocyclic group Chemical group 0.000 abstract 1
- 125000004070 6 membered heterocyclic group Chemical group 0.000 abstract 1
- ZCQWOFVYLHDMMC-UHFFFAOYSA-N Oxazole Chemical compound C1=COC=N1 ZCQWOFVYLHDMMC-UHFFFAOYSA-N 0.000 abstract 1
- WTKZEGDFNFYCGP-UHFFFAOYSA-N Pyrazole Chemical compound C=1C=NNC=1 WTKZEGDFNFYCGP-UHFFFAOYSA-N 0.000 abstract 1
- CZPWVGJYEJSRLH-UHFFFAOYSA-N Pyrimidine Chemical compound C1=CN=CN=C1 CZPWVGJYEJSRLH-UHFFFAOYSA-N 0.000 abstract 1
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 abstract 1
- FZWLAAWBMGSTSO-UHFFFAOYSA-N Thiazole Chemical compound C1=CSC=N1 FZWLAAWBMGSTSO-UHFFFAOYSA-N 0.000 abstract 1
- 239000002253 acid Substances 0.000 abstract 1
- 125000000217 alkyl group Chemical group 0.000 abstract 1
- BHELZAPQIKSEDF-UHFFFAOYSA-N allyl bromide Chemical compound BrCC=C BHELZAPQIKSEDF-UHFFFAOYSA-N 0.000 abstract 1
- 150000001450 anions Chemical group 0.000 abstract 1
- 125000003710 aryl alkyl group Chemical group 0.000 abstract 1
- 125000004432 carbon atom Chemical group C* 0.000 abstract 1
- 125000005842 heteroatom Chemical group 0.000 abstract 1
- 125000000623 heterocyclic group Chemical group 0.000 abstract 1
- -1 iminazoline Chemical compound 0.000 abstract 1
- HVTICUPFWKNHNG-UHFFFAOYSA-N iodoethane Chemical compound CCI HVTICUPFWKNHNG-UHFFFAOYSA-N 0.000 abstract 1
- QRXWMOHMRWLFEY-UHFFFAOYSA-N isoniazide Chemical compound NNC(=O)C1=CC=NC=C1 QRXWMOHMRWLFEY-UHFFFAOYSA-N 0.000 abstract 1
- 235000011118 potassium hydroxide Nutrition 0.000 abstract 1
- PBMFSQRYOILNGV-UHFFFAOYSA-N pyridazine Chemical compound C1=CC=NN=C1 PBMFSQRYOILNGV-UHFFFAOYSA-N 0.000 abstract 1
- 235000011121 sodium hydroxide Nutrition 0.000 abstract 1
- 239000001117 sulphuric acid Substances 0.000 abstract 1
- 235000011149 sulphuric acid Nutrition 0.000 abstract 1
- 150000003536 tetrazoles Chemical class 0.000 abstract 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract 1
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
- G03C1/485—Direct positive emulsions
- G03C1/48515—Direct positive emulsions prefogged
- G03C1/48523—Direct positive emulsions prefogged characterised by the desensitiser
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Luminescent Compositions (AREA)
- Plural Heterocyclic Compounds (AREA)
- Pharmaceuticals Containing Other Organic And Inorganic Compounds (AREA)
Abstract
Quaternary salts of the general formula:- <FORM:0875887/IV (b)/1> wherein R is an alkyl group of 1 to 6 carbon atoms or an allyl or aralkyl group, X is an anion, D is the residue of a 5- or 6-membered heterocyclic ring having at least one additional hetero atom in the indicated ring, and n is 0 or 1, are prepared by reacting the corresponding bases with salts of the formula RX. Examples are given of the reaction of methyl iodide, ethyl iodide, benzyl chloride, allyl bromide or b -phenylethyl toluene-p-sulphonate with 4-pyridyl heterocyclic bases wherein the heterocyclic ring D is benzthiazole, 4-phenyl-5-methyl-4 : 1 : 2-triazole, 5-methyl-1 : 3 : 4-oxadiazole, 5-methylthio-1 : 3 : 4-oxadiazole or 5-methylthio-1 : 3 : 4-thiadiazole. It is stated that D may also complete a thiazole, oxazole, selenazole, iminazole, iminazoline, pyrazole, tetrazole, pyrimidine, pyridazine or triazine ring including such nuclei having fused on benz rings. 3-(41-Pyridyl)-4-phenyl-5-methyl-4:1:2-triazole is prepared by heating a mixture of aniline and 2-(41-pyridyl)-5-methyl-1 : 3 : 4-oxadiazole. The product may be quaternized by refluxing with methyl iodide. 5-Methylthio-2-(4-pyridyl)-1:3:4-oxadiazole is prepared by adding methyl iodide to a cooled solution of 2-mercapto-5-(4-pyridyl)-1 : 3 : 4-oxadiazole in aqueous caustic soda. The product may be quaternized by refluxing with methyl iodide. 2-Methylthio-5-(4-pyridyl)-1:3:4-thiadiazole is prepared by heating a mixture of methyl 2-isonicotinyl-dithiocarbazinate and sulphuric acid. The product may be quaternized by heating with benzyl chloride. Methyl 2-isonicotinyl dithiocarbazinate is prepared by adding carbon disulphide to isonicotinic acid hydrazide in ethanolic caustic potash to give the free acid, which is then dissolved in water and treated with methyl iodide. Specification 797,144 and German Specification 574,944 are referred to.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB230159A GB875887A (en) | 1959-01-21 | 1959-01-21 | Improvements in or relating to direct positive emulsions |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB230159A GB875887A (en) | 1959-01-21 | 1959-01-21 | Improvements in or relating to direct positive emulsions |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB875887A true GB875887A (en) | 1961-08-23 |
Family
ID=9737154
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB230159A Expired GB875887A (en) | 1959-01-21 | 1959-01-21 | Improvements in or relating to direct positive emulsions |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB875887A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3511848A (en) * | 1966-03-21 | 1970-05-12 | American Cyanamid Co | Certain 4-(isoxazol-3 or 5-yl)-pyridinium salts |
| US3549763A (en) * | 1968-08-27 | 1970-12-22 | American Cyanamid Co | Methods and compositions for lowering blood glucose levels using substituted pyridinium salts |
| EP0585745A2 (en) * | 1992-08-20 | 1994-03-09 | Dainippon Ink And Chemicals, Inc. | Direct positive silver halide photographic material and method for forming high contrast positive image using the same |
| US7655767B2 (en) * | 2004-09-02 | 2010-02-02 | Clariant Finance (Bvi) Limited | Use of thiazolyl-pyridinium based dyes in optical layers for optical data recording |
-
1959
- 1959-01-21 GB GB230159A patent/GB875887A/en not_active Expired
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3511848A (en) * | 1966-03-21 | 1970-05-12 | American Cyanamid Co | Certain 4-(isoxazol-3 or 5-yl)-pyridinium salts |
| US3549763A (en) * | 1968-08-27 | 1970-12-22 | American Cyanamid Co | Methods and compositions for lowering blood glucose levels using substituted pyridinium salts |
| EP0585745A2 (en) * | 1992-08-20 | 1994-03-09 | Dainippon Ink And Chemicals, Inc. | Direct positive silver halide photographic material and method for forming high contrast positive image using the same |
| EP0585745A3 (en) * | 1992-08-20 | 1994-08-24 | Dainippon Ink & Chemicals | Direct positive silver halide photographic material and method for forming high contrast positive image using the same |
| US7655767B2 (en) * | 2004-09-02 | 2010-02-02 | Clariant Finance (Bvi) Limited | Use of thiazolyl-pyridinium based dyes in optical layers for optical data recording |
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