DE1769385A1 - Verfahren zur Herstellung von Cyaninfarbstoffen - Google Patents
Verfahren zur Herstellung von CyaninfarbstoffenInfo
- Publication number
- DE1769385A1 DE1769385A1 DE19681769385 DE1769385A DE1769385A1 DE 1769385 A1 DE1769385 A1 DE 1769385A1 DE 19681769385 DE19681769385 DE 19681769385 DE 1769385 A DE1769385 A DE 1769385A DE 1769385 A1 DE1769385 A1 DE 1769385A1
- Authority
- DE
- Germany
- Prior art keywords
- salt
- reaction
- heterocyclic
- general formula
- dimethylformamide
- 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.)
- Pending
Links
- 238000000034 method Methods 0.000 title claims description 38
- 239000000975 dye Substances 0.000 title claims description 28
- ANRHNWWPFJCPAZ-UHFFFAOYSA-M thionine Chemical compound [Cl-].C1=CC(N)=CC2=[S+]C3=CC(N)=CC=C3N=C21 ANRHNWWPFJCPAZ-UHFFFAOYSA-M 0.000 title claims description 9
- 238000004519 manufacturing process Methods 0.000 title description 5
- ZMXDDKWLCZADIW-UHFFFAOYSA-N N,N-Dimethylformamide Chemical compound CN(C)C=O ZMXDDKWLCZADIW-UHFFFAOYSA-N 0.000 claims description 48
- -1 inorganic acid halide Chemical class 0.000 claims description 41
- 150000003839 salts Chemical class 0.000 claims description 28
- 125000000623 heterocyclic group Chemical group 0.000 claims description 24
- WFDIJRYMOXRFFG-UHFFFAOYSA-N Acetic anhydride Chemical compound CC(=O)OC(C)=O WFDIJRYMOXRFFG-UHFFFAOYSA-N 0.000 claims description 21
- 238000006243 chemical reaction Methods 0.000 claims description 19
- 239000007795 chemical reaction product Substances 0.000 claims description 16
- 239000000203 mixture Substances 0.000 claims description 13
- XHXFXVLFKHQFAL-UHFFFAOYSA-N phosphoryl chloride Substances ClP(Cl)(Cl)=O XHXFXVLFKHQFAL-UHFFFAOYSA-N 0.000 claims description 13
- 238000002360 preparation method Methods 0.000 claims description 13
- 239000002253 acid Substances 0.000 claims description 11
- 125000004429 atom Chemical group 0.000 claims description 9
- 238000010992 reflux Methods 0.000 claims description 9
- 150000001450 anions Chemical class 0.000 claims description 8
- 150000001875 compounds Chemical class 0.000 claims description 8
- 239000002904 solvent Substances 0.000 claims description 7
- 239000003795 chemical substances by application Substances 0.000 claims description 6
- 125000004432 carbon atom Chemical group C* 0.000 claims description 5
- 150000005840 aryl radicals Chemical class 0.000 claims description 4
- 239000000298 carbocyanine Substances 0.000 claims description 4
- NSYKYZBOQLCIHR-UHFFFAOYSA-N 2-nitro-1,3-benzothiazole Chemical compound C1=CC=C2SC([N+](=O)[O-])=NC2=C1 NSYKYZBOQLCIHR-UHFFFAOYSA-N 0.000 claims description 3
- 125000003342 alkenyl group Chemical group 0.000 claims description 3
- 230000015572 biosynthetic process Effects 0.000 claims description 3
- JVDYWBQJOUXQBB-UHFFFAOYSA-N 2-nitro-1,3-benzoxazole Chemical compound C1=CC=C2OC([N+](=O)[O-])=NC2=C1 JVDYWBQJOUXQBB-UHFFFAOYSA-N 0.000 claims description 2
- 125000000217 alkyl group Chemical group 0.000 claims description 2
- 229910052755 nonmetal Inorganic materials 0.000 claims description 2
- 125000000547 substituted alkyl group Chemical group 0.000 claims description 2
- XDUSKIGZUZUMKH-UHFFFAOYSA-N 2-(3-ethyl-6-nitro-1,3-benzothiazol-2-ylidene)acetaldehyde Chemical compound [O-][N+](=O)C1=CC=C2N(CC)C(=CC=O)SC2=C1 XDUSKIGZUZUMKH-UHFFFAOYSA-N 0.000 claims 1
- YKDDFXDOZTUVSS-UHFFFAOYSA-N 2-nitro-1,3-benzoselenazole Chemical compound C1=CC=C2[se]C([N+](=O)[O-])=NC2=C1 YKDDFXDOZTUVSS-UHFFFAOYSA-N 0.000 claims 1
- SEAUVNCROKFVSE-UHFFFAOYSA-N 3-ethyl-2-methyl-6-nitro-1,3-benzothiazol-3-ium Chemical class [O-][N+](=O)C1=CC=C2[N+](CC)=C(C)SC2=C1 SEAUVNCROKFVSE-UHFFFAOYSA-N 0.000 claims 1
- WJQWYAJTPPYORB-UHFFFAOYSA-N 5-nitro-2,3-dihydro-1h-indole Chemical compound [O-][N+](=O)C1=CC=C2NCCC2=C1 WJQWYAJTPPYORB-UHFFFAOYSA-N 0.000 claims 1
- 238000009833 condensation Methods 0.000 claims 1
- 230000005494 condensation Effects 0.000 claims 1
- 235000013601 eggs Nutrition 0.000 claims 1
- 238000010438 heat treatment Methods 0.000 claims 1
- WCYWZMWISLQXQU-UHFFFAOYSA-N methyl Chemical compound [CH3] WCYWZMWISLQXQU-UHFFFAOYSA-N 0.000 claims 1
- QWYZFXLSWMXLDM-UHFFFAOYSA-M pinacyanol iodide Chemical compound [I-].C1=CC2=CC=CC=C2N(CC)C1=CC=CC1=CC=C(C=CC=C2)C2=[N+]1CC QWYZFXLSWMXLDM-UHFFFAOYSA-M 0.000 claims 1
- XSCHRSMBECNVNS-UHFFFAOYSA-N quinoxaline Chemical class N1=CC=NC2=CC=CC=C21 XSCHRSMBECNVNS-UHFFFAOYSA-N 0.000 claims 1
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 description 30
- RTZKZFJDLAIYFH-UHFFFAOYSA-N Diethyl ether Chemical compound CCOCC RTZKZFJDLAIYFH-UHFFFAOYSA-N 0.000 description 20
- 239000011541 reaction mixture Substances 0.000 description 10
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 7
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 6
- 239000000839 emulsion Substances 0.000 description 6
- 239000000047 product Substances 0.000 description 6
- 150000003254 radicals Chemical class 0.000 description 6
- XMBWDFGMSWQBCA-UHFFFAOYSA-N hydrogen iodide Chemical compound I XMBWDFGMSWQBCA-UHFFFAOYSA-N 0.000 description 5
- 229910052709 silver Inorganic materials 0.000 description 5
- 239000004332 silver Substances 0.000 description 5
- JOXIMZWYDAKGHI-UHFFFAOYSA-N toluene-4-sulfonic acid Chemical compound CC1=CC=C(S(O)(=O)=O)C=C1 JOXIMZWYDAKGHI-UHFFFAOYSA-N 0.000 description 5
- CPELXLSAUQHCOX-UHFFFAOYSA-M Bromide Chemical compound [Br-] CPELXLSAUQHCOX-UHFFFAOYSA-M 0.000 description 4
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 4
- ZHNUHDYFZUAESO-UHFFFAOYSA-N Formamide Chemical compound NC=O ZHNUHDYFZUAESO-UHFFFAOYSA-N 0.000 description 4
- JUJWROOIHBZHMG-UHFFFAOYSA-N Pyridine Chemical compound C1=CC=NC=C1 JUJWROOIHBZHMG-UHFFFAOYSA-N 0.000 description 4
- 239000002585 base Substances 0.000 description 4
- 238000002425 crystallisation Methods 0.000 description 4
- 230000008025 crystallization Effects 0.000 description 4
- 239000002244 precipitate Substances 0.000 description 4
- 238000001953 recrystallisation Methods 0.000 description 4
- VEXZGXHMUGYJMC-UHFFFAOYSA-M Chloride anion Chemical compound [Cl-] VEXZGXHMUGYJMC-UHFFFAOYSA-M 0.000 description 3
- 238000000354 decomposition reaction Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- QTDONSFCQTXFDD-UHFFFAOYSA-M 3-ethyl-2-methyl-6-nitro-1,3-benzothiazol-3-ium;4-methylbenzenesulfonate Chemical compound CC1=CC=C(S([O-])(=O)=O)C=C1.[O-][N+](=O)C1=CC=C2[N+](CC)=C(C)SC2=C1 QTDONSFCQTXFDD-UHFFFAOYSA-M 0.000 description 2
- IOJUPLGTWVMSFF-UHFFFAOYSA-N benzothiazole Chemical compound C1=CC=C2SC=NC2=C1 IOJUPLGTWVMSFF-UHFFFAOYSA-N 0.000 description 2
- 239000012043 crude product Substances 0.000 description 2
- 125000001495 ethyl group Chemical group [H]C([H])([H])C([H])([H])* 0.000 description 2
- 230000007062 hydrolysis Effects 0.000 description 2
- 238000006460 hydrolysis reaction Methods 0.000 description 2
- 239000000543 intermediate Substances 0.000 description 2
- 125000002496 methyl group Chemical group [H]C([H])([H])* 0.000 description 2
- IOLCXVTUBQKXJR-UHFFFAOYSA-M potassium bromide Chemical compound [K+].[Br-] IOLCXVTUBQKXJR-UHFFFAOYSA-M 0.000 description 2
- 125000001436 propyl group Chemical group [H]C([*])([H])C([H])([H])C([H])([H])[H] 0.000 description 2
- 230000035945 sensitivity Effects 0.000 description 2
- 230000001235 sensitizing effect Effects 0.000 description 2
- GEHJYWRUCIMESM-UHFFFAOYSA-L sodium sulfite Chemical compound [Na+].[Na+].[O-]S([O-])=O GEHJYWRUCIMESM-UHFFFAOYSA-L 0.000 description 2
- 239000011343 solid material Substances 0.000 description 2
- 239000006228 supernatant Substances 0.000 description 2
- FYSNRJHAOHDILO-UHFFFAOYSA-N thionyl chloride Chemical compound ClS(Cl)=O FYSNRJHAOHDILO-UHFFFAOYSA-N 0.000 description 2
- AIGNCQCMONAWOL-UHFFFAOYSA-N 1,3-benzoselenazole Chemical compound C1=CC=C2[se]C=NC2=C1 AIGNCQCMONAWOL-UHFFFAOYSA-N 0.000 description 1
- BCMCBBGGLRIHSE-UHFFFAOYSA-N 1,3-benzoxazole Chemical compound C1=CC=C2OC=NC2=C1 BCMCBBGGLRIHSE-UHFFFAOYSA-N 0.000 description 1
- ODIRBFFBCSTPTO-UHFFFAOYSA-N 1,3-selenazole Chemical class C1=C[se]C=N1 ODIRBFFBCSTPTO-UHFFFAOYSA-N 0.000 description 1
- 125000006017 1-propenyl group Chemical group 0.000 description 1
- VPGMVZJLRMPXBV-UHFFFAOYSA-N 2-(1,3,3-trimethyl-5-nitroindol-2-ylidene)acetaldehyde Chemical compound [O-][N+](=O)C1=CC=C2N(C)C(=CC=O)C(C)(C)C2=C1 VPGMVZJLRMPXBV-UHFFFAOYSA-N 0.000 description 1
- FDVITFMRUUGIBF-UHFFFAOYSA-N 2-methylidene-1,3-dihydroindole Chemical compound C1=CC=C2NC(=C)CC2=C1 FDVITFMRUUGIBF-UHFFFAOYSA-N 0.000 description 1
- 125000003903 2-propenyl group Chemical group [H]C([*])([H])C([H])=C([H])[H] 0.000 description 1
- ZVNPWFOVUDMGRP-UHFFFAOYSA-N 4-methylaminophenol sulfate Chemical compound OS(O)(=O)=O.CNC1=CC=C(O)C=C1.CNC1=CC=C(O)C=C1 ZVNPWFOVUDMGRP-UHFFFAOYSA-N 0.000 description 1
- ZAMOUSCENKQFHK-UHFFFAOYSA-N Chlorine atom Chemical compound [Cl] ZAMOUSCENKQFHK-UHFFFAOYSA-N 0.000 description 1
- SNRUBQQJIBEYMU-UHFFFAOYSA-N Dodecane Natural products CCCCCCCCCCCC SNRUBQQJIBEYMU-UHFFFAOYSA-N 0.000 description 1
- VGGSQFUCUMXWEO-UHFFFAOYSA-N Ethene Chemical compound C=C VGGSQFUCUMXWEO-UHFFFAOYSA-N 0.000 description 1
- 239000005977 Ethylene Substances 0.000 description 1
- 108010010803 Gelatin Proteins 0.000 description 1
- CPELXLSAUQHCOX-UHFFFAOYSA-N Hydrogen bromide Chemical compound Br CPELXLSAUQHCOX-UHFFFAOYSA-N 0.000 description 1
- SIKJAQJRHWYJAI-UHFFFAOYSA-N Indole Chemical compound C1=CC=C2NC=CC2=C1 SIKJAQJRHWYJAI-UHFFFAOYSA-N 0.000 description 1
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 description 1
- QAOWNCQODCNURD-UHFFFAOYSA-L Sulfate Chemical compound [O-]S([O-])(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-L 0.000 description 1
- ZMZDMBWJUHKJPS-UHFFFAOYSA-M Thiocyanate anion Chemical compound [S-]C#N ZMZDMBWJUHKJPS-UHFFFAOYSA-M 0.000 description 1
- SJOOOZPMQAWAOP-UHFFFAOYSA-N [Ag].BrCl Chemical compound [Ag].BrCl SJOOOZPMQAWAOP-UHFFFAOYSA-N 0.000 description 1
- 239000000370 acceptor Substances 0.000 description 1
- 230000002378 acidificating effect Effects 0.000 description 1
- 229910001854 alkali hydroxide Inorganic materials 0.000 description 1
- 150000008044 alkali metal hydroxides Chemical class 0.000 description 1
- 150000008064 anhydrides Chemical class 0.000 description 1
- 229910052925 anhydrite Inorganic materials 0.000 description 1
- AMTXUWGBSGZXCJ-UHFFFAOYSA-N benzo[e][1,3]benzoselenazole Chemical class C1=CC=C2C(N=C[se]3)=C3C=CC2=C1 AMTXUWGBSGZXCJ-UHFFFAOYSA-N 0.000 description 1
- WMUIZUWOEIQJEH-UHFFFAOYSA-N benzo[e][1,3]benzoxazole Chemical class C1=CC=C2C(N=CO3)=C3C=CC2=C1 WMUIZUWOEIQJEH-UHFFFAOYSA-N 0.000 description 1
- 125000000484 butyl group Chemical group [H]C([*])([H])C([H])([H])C([H])([H])C([H])([H])[H] 0.000 description 1
- OSGAYBCDTDRGGQ-UHFFFAOYSA-L calcium sulfate Chemical compound [Ca+2].[O-]S([O-])(=O)=O OSGAYBCDTDRGGQ-UHFFFAOYSA-L 0.000 description 1
- 239000000460 chlorine Substances 0.000 description 1
- 229910052801 chlorine Inorganic materials 0.000 description 1
- QQVDYSUDFZZPSU-UHFFFAOYSA-M chloromethylidene(dimethyl)azanium;chloride Chemical compound [Cl-].C[N+](C)=CCl QQVDYSUDFZZPSU-UHFFFAOYSA-M 0.000 description 1
- 125000000113 cyclohexyl group Chemical group [H]C1([H])C([H])([H])C([H])([H])C([H])(*)C([H])([H])C1([H])[H] 0.000 description 1
- 125000002704 decyl group Chemical group [H]C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])* 0.000 description 1
- 238000000586 desensitisation Methods 0.000 description 1
- XAEWZDYWZHIUCT-UHFFFAOYSA-N desipramine hydrochloride Chemical compound [H+].[Cl-].C1CC2=CC=CC=C2N(CCCNC)C2=CC=CC=C21 XAEWZDYWZHIUCT-UHFFFAOYSA-N 0.000 description 1
- MQRJBSHKWOFOGF-UHFFFAOYSA-L disodium;carbonate;hydrate Chemical compound O.[Na+].[Na+].[O-]C([O-])=O MQRJBSHKWOFOGF-UHFFFAOYSA-L 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 150000003948 formamides Chemical class 0.000 description 1
- 229920000159 gelatin Polymers 0.000 description 1
- 239000008273 gelatin Substances 0.000 description 1
- 235000019322 gelatine Nutrition 0.000 description 1
- 235000011852 gelatine desserts Nutrition 0.000 description 1
- 229910052736 halogen Inorganic materials 0.000 description 1
- 150000002367 halogens Chemical class 0.000 description 1
- 150000002391 heterocyclic compounds Chemical class 0.000 description 1
- 125000004051 hexyl group Chemical group [H]C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])* 0.000 description 1
- ZMZDMBWJUHKJPS-UHFFFAOYSA-N hydrogen thiocyanate Natural products SC#N ZMZDMBWJUHKJPS-UHFFFAOYSA-N 0.000 description 1
- RKJUIXBNRJVNHR-UHFFFAOYSA-N indolenine group Chemical group N1=CCC2=CC=CC=C12 RKJUIXBNRJVNHR-UHFFFAOYSA-N 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 125000001449 isopropyl group Chemical group [H]C([H])([H])C([H])(*)C([H])([H])[H] 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- JZMJDSHXVKJFKW-UHFFFAOYSA-M methyl sulfate(1-) Chemical compound COS([O-])(=O)=O JZMJDSHXVKJFKW-UHFFFAOYSA-M 0.000 description 1
- 150000007522 mineralic acids Chemical class 0.000 description 1
- 125000000449 nitro group Chemical group [O-][N+](*)=O 0.000 description 1
- 150000002916 oxazoles Chemical class 0.000 description 1
- 239000003415 peat Substances 0.000 description 1
- VLTRZXGMWDSKGL-UHFFFAOYSA-M perchlorate Inorganic materials [O-]Cl(=O)(=O)=O VLTRZXGMWDSKGL-UHFFFAOYSA-M 0.000 description 1
- VLTRZXGMWDSKGL-UHFFFAOYSA-N perchloric acid Chemical compound OCl(=O)(=O)=O VLTRZXGMWDSKGL-UHFFFAOYSA-N 0.000 description 1
- 125000001997 phenyl group Chemical group [H]C1=C([H])C([H])=C(*)C([H])=C1[H] 0.000 description 1
- FAIAAWCVCHQXDN-UHFFFAOYSA-N phosphorus trichloride Chemical compound ClP(Cl)Cl FAIAAWCVCHQXDN-UHFFFAOYSA-N 0.000 description 1
- UMJSCPRVCHMLSP-UHFFFAOYSA-N pyridine Natural products COC1=CC=CN=C1 UMJSCPRVCHMLSP-UHFFFAOYSA-N 0.000 description 1
- 125000006413 ring segment Chemical group 0.000 description 1
- 239000011734 sodium Substances 0.000 description 1
- 235000010265 sodium sulphite Nutrition 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 230000003595 spectral effect Effects 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 125000001424 substituent group Chemical group 0.000 description 1
- YBBRCQOCSYXUOC-UHFFFAOYSA-N sulfuryl dichloride Chemical compound ClS(Cl)(=O)=O YBBRCQOCSYXUOC-UHFFFAOYSA-N 0.000 description 1
- 238000003786 synthesis reaction Methods 0.000 description 1
- 150000003512 tertiary amines Chemical class 0.000 description 1
- 150000003557 thiazoles Chemical class 0.000 description 1
- CBDKQYKMCICBOF-UHFFFAOYSA-N thiazoline Chemical compound C1CN=CS1 CBDKQYKMCICBOF-UHFFFAOYSA-N 0.000 description 1
- 125000005023 xylyl group Chemical group 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09B—ORGANIC DYES OR CLOSELY-RELATED COMPOUNDS FOR PRODUCING DYES, e.g. PIGMENTS; MORDANTS; LAKES
- C09B23/00—Methine or polymethine dyes, e.g. cyanine dyes
- C09B23/02—Methine or polymethine dyes, e.g. cyanine dyes the polymethine chain containing an odd number of >CH- or >C[alkyl]- groups
- C09B23/06—Methine or polymethine dyes, e.g. cyanine dyes the polymethine chain containing an odd number of >CH- or >C[alkyl]- groups three >CH- groups, e.g. carbocyanines
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Plural Heterocyclic Compounds (AREA)
- Indole Compounds (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US63903067A | 1967-05-17 | 1967-05-17 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| DE1769385A1 true DE1769385A1 (de) | 1971-04-08 |
Family
ID=24562441
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DE19681769385 Pending DE1769385A1 (de) | 1967-05-17 | 1968-05-16 | Verfahren zur Herstellung von Cyaninfarbstoffen |
Country Status (5)
| Country | Link |
|---|---|
| US (1) | US3723419A (forum.php) |
| BE (1) | BE715267A (forum.php) |
| DE (1) | DE1769385A1 (forum.php) |
| FR (1) | FR1565912A (forum.php) |
| GB (1) | GB1199798A (forum.php) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4016172A (en) * | 1970-09-09 | 1977-04-05 | Bayer Aktiengesellschaft | Azolindolines and azolindoline dyestuffs |
| DE2249350A1 (de) * | 1972-10-07 | 1974-04-11 | Bayer Ag | Fungizide mittel |
| TW572969B (en) * | 2000-02-10 | 2004-01-21 | Hayashibara Biochem Lab | Trimethine cyanine dye, light absorbent, light-resistant improver and optical recording medium containing same, and process for producing same |
| EP2325263B1 (en) * | 2000-09-29 | 2013-01-23 | Life Technologies Corporation | Modified carbocyanine dyes and their conjugates |
| WO2012054749A1 (en) * | 2010-10-20 | 2012-04-26 | Li-Cor, Inc. | Cyanine dyes and their conjugates |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| BE403179A (forum.php) * | 1933-05-16 | |||
| GB466245A (en) * | 1935-08-15 | 1937-05-18 | Eastman Kodak Co | Improvements in the manufacture of carbocyanine dyes |
| GB543993A (en) * | 1940-09-20 | 1942-03-23 | John David Kendall | Improvements in or relating to photographic materials |
| CH451373A (de) * | 1963-08-30 | 1968-05-15 | Bayer Ag | Verfahren zur Herstellung von basischen Farbstoffen |
-
1967
- 1967-05-17 US US00639030A patent/US3723419A/en not_active Expired - Lifetime
-
1968
- 1968-05-15 GB GB22973/68A patent/GB1199798A/en not_active Expired
- 1968-05-16 DE DE19681769385 patent/DE1769385A1/de active Pending
- 1968-05-16 BE BE715267D patent/BE715267A/xx unknown
- 1968-05-17 FR FR1565912D patent/FR1565912A/fr not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| BE715267A (forum.php) | 1968-10-16 |
| US3723419A (en) | 1973-03-27 |
| FR1565912A (forum.php) | 1969-05-02 |
| GB1199798A (en) | 1970-07-22 |
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