CH173291A - Process for the preparation of a cyanine dye. - Google Patents
Process for the preparation of a cyanine dye.Info
- Publication number
- CH173291A CH173291A CH173291DA CH173291A CH 173291 A CH173291 A CH 173291A CH 173291D A CH173291D A CH 173291DA CH 173291 A CH173291 A CH 173291A
- Authority
- CH
- Switzerland
- Prior art keywords
- dye
- takes place
- reaction takes
- preparation
- cyanine dye
- Prior art date
Links
- 238000000034 method Methods 0.000 title claims description 12
- ANRHNWWPFJCPAZ-UHFFFAOYSA-M thionine Chemical compound [Cl-].C1=CC(N)=CC2=[S+]C3=CC(N)=CC=C3N=C21 ANRHNWWPFJCPAZ-UHFFFAOYSA-M 0.000 title description 4
- 238000002360 preparation method Methods 0.000 title description 2
- JUJWROOIHBZHMG-UHFFFAOYSA-N Pyridine Chemical compound C1=CC=NC=C1 JUJWROOIHBZHMG-UHFFFAOYSA-N 0.000 claims description 6
- 239000003795 chemical substances by application Substances 0.000 claims description 3
- UMJSCPRVCHMLSP-UHFFFAOYSA-N pyridine Natural products COC1=CC=CN=C1 UMJSCPRVCHMLSP-UHFFFAOYSA-N 0.000 claims description 3
- 239000003513 alkali Substances 0.000 claims description 2
- 239000002585 base Substances 0.000 claims description 2
- 239000007795 chemical reaction product Substances 0.000 claims description 2
- 238000004519 manufacturing process Methods 0.000 claims description 2
- 239000002904 solvent Substances 0.000 claims description 2
- QTBSBXVTEAMEQO-UHFFFAOYSA-N Acetic acid Chemical compound CC(O)=O QTBSBXVTEAMEQO-UHFFFAOYSA-N 0.000 claims 2
- -1 2-methylbenzoselenazole iodine Chemical compound 0.000 claims 1
- ZCYVEMRRCGMTRW-UHFFFAOYSA-N 7553-56-2 Chemical compound [I] ZCYVEMRRCGMTRW-UHFFFAOYSA-N 0.000 claims 1
- 239000013078 crystal Substances 0.000 claims 1
- 229910052740 iodine Inorganic materials 0.000 claims 1
- 239000011630 iodine Substances 0.000 claims 1
- NQRYJNQNLNOLGT-UHFFFAOYSA-N Piperidine Chemical compound C1CCNCC1 NQRYJNQNLNOLGT-UHFFFAOYSA-N 0.000 description 4
- XGZVPYGIUMLWIE-UHFFFAOYSA-N ethyl hypoiodite Chemical compound CCOI XGZVPYGIUMLWIE-UHFFFAOYSA-N 0.000 description 3
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 2
- 239000000839 emulsion Substances 0.000 description 2
- VYFYELQQECQPHU-UHFFFAOYSA-N 2-methyl-1,3-benzoselenazole Chemical compound C1=CC=C2[se]C(C)=NC2=C1 VYFYELQQECQPHU-UHFFFAOYSA-N 0.000 description 1
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 description 1
- 230000001476 alcoholic effect Effects 0.000 description 1
- 238000009835 boiling Methods 0.000 description 1
- 239000006227 byproduct Substances 0.000 description 1
- 125000001495 ethyl group Chemical group [H]C([H])([H])C([H])([H])* 0.000 description 1
- 229910052736 halogen Inorganic materials 0.000 description 1
- 150000002367 halogens Chemical class 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- XMBWDFGMSWQBCA-UHFFFAOYSA-N hydrogen iodide Chemical compound I XMBWDFGMSWQBCA-UHFFFAOYSA-N 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 239000011541 reaction mixture Substances 0.000 description 1
- 238000010992 reflux Methods 0.000 description 1
- 230000001235 sensitizing effect Effects 0.000 description 1
- 229910052709 silver Inorganic materials 0.000 description 1
- 239000004332 silver Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Landscapes
- Nitrogen Condensed Heterocyclic Rings (AREA)
Description
Verfahren zur Herstellung eines Cyaninfarbstofes. Gegenstand der Erfindung ist ein Ver fahren zur Herstellung eines Cyaninfarb- stoffes, nämlich eines Selenopseudocyanins, wobei man N-Äthyl-para-tolu-a-thiochi- nolonjodäthylat mit 2-1VIethylbenzoselenazo- jodäthylat, zweckmässigerweise in Gegenwart von Kondensationsmitteln, umsetzt, vorteil haft solchen, die zugleich Lösungsmittel für den Endstoff sind.
Als Kondensationsmittel sind insbesondere Pyridinbasen geeignet.
Die Ausbeute an Farbstoff ist bei dem vorliegenden Verfahren erheblich besser als bei -den bekannten Verfahren. Ausserdem fällt der Farbstoff in sehr reiner Form an, da er ohne Farbstoffnebenprodukt entweder aus dem Reaktionsgemisch unmittelbar aus kristallisiert oder durch Wasser gefällt wer den kann.
Der nach dem vorliegenden Verfahren hergestellte Cyaninfarbstoff eignet sich sehr gut zur Sensibilisierung photographischer Ha logensilberemulsionen. Der Farbstoff wird in den üblichen Konzentrationen den Emul sionen zugesetzt.
Beispiel Das 1.1'-Diäthyl-para-toluchino-seleno- pseudocyaninjodid der folgenden Formel:
EMI0001.0023
wird erhalten, indem man, 100 gr 2-Methyl- benzoselenazoljodäthylat in 1 Liter Alkohol am Rückflusskühler auf dem Dampfbad er hitzt. Zu diesem Gemisch fügt man 110 gr N Äthyl-para-tolu-a-thiochinolonjodäthylat und nach kurzem Kochen und vollständiger Lö sung noch 40 cm' Piperidin langsam hinzu.
Der Farbstoff wird sofort als eine dicke, kristalline, scharlachrote Masse ausgefällt. Diese Masse wird auf dem Dampfbad eine 'halbe Stunde lang erhitzt, hierauf abgekühlt und der Farbstoff filtriert. Nach zweimaligem Umkristallisieren aus Alkohol erhält man den Farbstoff in reiner Form. Ausbeute: 85 gr Rohfarbstoff und 75 gr reiner Farb stoff.
Den Farbstoff kann man auch, ebenfalls in guter Ausbeute, unter Verwendung von alkoholischer oder wässerig-alkoholischer Lösung unter Zusatz von etwas mehr als 1 Mol. Alkalilauge, Piperidin oder Pyridin, herstellen.
Process for the preparation of a cyanine dye. The invention relates to a process for the production of a cyanine dye, namely a selenopseudocyanine, in which N-ethyl-para-tolu-a-thioquinolone iodoethylate is reacted with 2-1VIethylbenzoselenazoiodoethylate, advantageously in the presence of condensing agents those that are also solvents for the end product.
Pyridine bases are particularly suitable as condensing agents.
The yield of dye in the present process is considerably better than in the known processes. In addition, the dye is obtained in a very pure form, since it either crystallizes directly from the reaction mixture without a dye by-product or can be precipitated by water.
The cyanine dye prepared by the present process is very suitable for sensitizing photographic halogen silver emulsions. The dye is added to the emulsions in the usual concentrations.
Example 1.1'-Diethyl-para-toluchino-selenopseudocyanin iodide of the following formula:
EMI0001.0023
is obtained by heating 100 g of 2-methyl benzoselenazole iodoethylate in 1 liter of alcohol on the reflux condenser on the steam bath. To this mixture is added 110 grams of N ethyl para-tolu-a-thioquinolone iodoethylate and, after brief boiling and complete solution, 40 cm of piperidine is slowly added.
The dye is immediately precipitated as a thick, crystalline, scarlet mass. This mass is heated on the steam bath for half an hour, then cooled and the dye filtered. After recrystallizing twice from alcohol, the dye is obtained in pure form. Yield: 85 grams of raw dye and 75 grams of pure dye.
The dye can also be prepared, likewise in good yield, using an alcoholic or aqueous-alcoholic solution with the addition of a little more than 1 mole of alkali, piperidine or pyridine.
Claims (1)
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE173291X | 1932-07-13 | ||
| CH171373T | 1933-07-13 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CH173291A true CH173291A (en) | 1934-11-15 |
Family
ID=25719071
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CH173291D CH173291A (en) | 1932-07-13 | 1933-07-13 | Process for the preparation of a cyanine dye. |
Country Status (1)
| Country | Link |
|---|---|
| CH (1) | CH173291A (en) |
-
1933
- 1933-07-13 CH CH173291D patent/CH173291A/en unknown
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CH173291A (en) | Process for the preparation of a cyanine dye. | |
| DE1470023A1 (en) | Process for the preparation of therapeutically effective new derivatives of oripavin | |
| CH173294A (en) | Process for the preparation of a cyanine dye. | |
| CH173288A (en) | Process for the preparation of a cyanine dye. | |
| CH173293A (en) | Process for the preparation of a cyanine dye. | |
| CH173287A (en) | Process for the preparation of a cyanine dye. | |
| CH173290A (en) | Process for the preparation of a cyanine dye. | |
| CH173289A (en) | Process for the preparation of a cyanine dye. | |
| CH173292A (en) | Process for the preparation of a cyanine dye. | |
| CH171373A (en) | Process for the preparation of a cyanine dye. | |
| CH173285A (en) | Process for the preparation of a cyanine dye. | |
| DE515092C (en) | Process for the preparation of salts of choline | |
| CH173286A (en) | Process for the preparation of a cyanine dye. | |
| DE828550C (en) | Process for the production of new quaternary salts of the aniline-derived ethers | |
| DE737193C (en) | Process for the preparation of unsymmetrical heptamethine cyanine dyes | |
| AT92407B (en) | Process for the preparation of 1-allyl-3,7-dimethylxanthine. | |
| CH186450A (en) | Process for the preparation of an unsymmetrical heptacarbocyanine dye. | |
| AT281808B (en) | Process for the preparation of new 2-alkoxy- or 2-alkenyloxy-4,5-azimidobenzamides and their salts | |
| AT113002B (en) | Process for the preparation of monoboric acid choline. | |
| AT99681B (en) | Process for the preparation of easily soluble salts of quinine. | |
| CH182404A (en) | Process for the preparation of an unsymmetrical heptacarbocyanine dye. | |
| CH155045A (en) | Process for the preparation of 1-phenyl-2-benzylaminopropanol-1. | |
| CH186448A (en) | Process for the preparation of an unsymmetrical heptacarbocyanine dye. | |
| CH215551A (en) | Process for the preparation of a new enol derivative containing the sterol core. | |
| CH186451A (en) | Process for the preparation of an unsymmetrical heptacarbocyanine dye. |