GB988331A - 5,12-dihydro-5,7,12,14-tetraazapentacene sulphonic acids, salts thereof, and processes for the production thereof - Google Patents
5,12-dihydro-5,7,12,14-tetraazapentacene sulphonic acids, salts thereof, and processes for the production thereofInfo
- Publication number
- GB988331A GB988331A GB3192262A GB3192262A GB988331A GB 988331 A GB988331 A GB 988331A GB 3192262 A GB3192262 A GB 3192262A GB 3192262 A GB3192262 A GB 3192262A GB 988331 A GB988331 A GB 988331A
- Authority
- GB
- United Kingdom
- Prior art keywords
- tetraazapentacene
- dihydro
- salts
- sulphonic acids
- processes
- 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
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07D—HETEROCYCLIC COMPOUNDS
- C07D487/00—Heterocyclic compounds containing nitrogen atoms as the only ring hetero atoms in the condensed system, not provided for by groups C07D451/00 - C07D477/00
- C07D487/02—Heterocyclic compounds containing nitrogen atoms as the only ring hetero atoms in the condensed system, not provided for by groups C07D451/00 - C07D477/00 in which the condensed system contains two hetero rings
- C07D487/04—Ortho-condensed systems
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Pharmaceuticals Containing Other Organic And Inorganic Compounds (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
- Medicinal Preparation (AREA)
Abstract
The invention comprises 5,12-dihydro-5,7,12, 14 - tetraazapentacene - 2 - or 9 - sulphonic or 2,9-disulphonic acids, their sodium and potassium salts, the preparation thereof by reacting 5,12 - dihydro - 5,7,12,14 - tetraazapentacene with fuming sulphuric acid or with chlorosulphonic acid in the presence of mercuric oxide or mercuric sulphate as a catalyst and if desired refining and separating a mixture of mono- and di-sulphonic acids by column chromatography, and pharmaceutical compositions containing them. The process involves the formation and subsequent hydrolysis of the sulphonyl chloride when chlorosulphonic acid is used. Pharmaceutical compositions useful in the treatment of cataract are in the form of eye drops or solutions for injection and comprise the compounds of the invention together with a suitable carrier.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB3192262A GB988331A (en) | 1962-08-20 | 1962-08-20 | 5,12-dihydro-5,7,12,14-tetraazapentacene sulphonic acids, salts thereof, and processes for the production thereof |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB3192262A GB988331A (en) | 1962-08-20 | 1962-08-20 | 5,12-dihydro-5,7,12,14-tetraazapentacene sulphonic acids, salts thereof, and processes for the production thereof |
Publications (1)
Publication Number | Publication Date |
---|---|
GB988331A true GB988331A (en) | 1965-04-07 |
Family
ID=10330390
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB3192262A Expired GB988331A (en) | 1962-08-20 | 1962-08-20 | 5,12-dihydro-5,7,12,14-tetraazapentacene sulphonic acids, salts thereof, and processes for the production thereof |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB988331A (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3522257A (en) * | 1967-02-28 | 1970-07-28 | Ciba Ltd | Tetrazapentacene dyestuffs |
WO2009083532A2 (en) * | 2007-12-28 | 2009-07-09 | Universite De La Mediterranee Aix-Marseille Ii | Novel method for the preparation of derivatives of dihydrotetraazapentacenes, products such as obtained, and uses thereof |
US9120803B2 (en) | 2012-06-07 | 2015-09-01 | Signa S.A. De C.V. | Processes for the preparation of sodium 5,14-dihydrotetraazapentacene polysulfonate, and intermediates thereof |
-
1962
- 1962-08-20 GB GB3192262A patent/GB988331A/en not_active Expired
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3522257A (en) * | 1967-02-28 | 1970-07-28 | Ciba Ltd | Tetrazapentacene dyestuffs |
WO2009083532A2 (en) * | 2007-12-28 | 2009-07-09 | Universite De La Mediterranee Aix-Marseille Ii | Novel method for the preparation of derivatives of dihydrotetraazapentacenes, products such as obtained, and uses thereof |
EP2078720A1 (en) * | 2007-12-28 | 2009-07-15 | Université de la Méditerranée - Aix-Marseille II | Novel method for the preparation of derivatives of dihydrotetraazapentacenes, products such as obtained and uses thereof |
WO2009083532A3 (en) * | 2007-12-28 | 2009-11-12 | Universite De La Mediterranee Aix-Marseille Ii | Novel method for the preparation of derivatives of dihydrotetraazapentacenes, products such as obtained, and uses thereof |
US9120803B2 (en) | 2012-06-07 | 2015-09-01 | Signa S.A. De C.V. | Processes for the preparation of sodium 5,14-dihydrotetraazapentacene polysulfonate, and intermediates thereof |
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