GB1432827A - Process for the production of 2,3-dicyano-1,4-dithiaanthrahydro quinone and -anthraquinone - Google Patents
Process for the production of 2,3-dicyano-1,4-dithiaanthrahydro quinone and -anthraquinoneInfo
- Publication number
- GB1432827A GB1432827A GB4259373A GB4259373A GB1432827A GB 1432827 A GB1432827 A GB 1432827A GB 4259373 A GB4259373 A GB 4259373A GB 4259373 A GB4259373 A GB 4259373A GB 1432827 A GB1432827 A GB 1432827A
- Authority
- GB
- United Kingdom
- Prior art keywords
- dicyano
- anthraquinone
- dithiaanthrahydro
- quinone
- production
- 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
- C07D339/00—Heterocyclic compounds containing rings having two sulfur atoms as the only ring hetero atoms
- C07D339/08—Six-membered rings
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
- Heterocyclic Carbon Compounds Containing A Hetero Ring Having Oxygen Or Sulfur (AREA)
- Heterocyclic Compounds Containing Sulfur Atoms (AREA)
Abstract
1432827 2,3 - Dicyano - 1,4 - dithia - anthrahydroquinone and -anthraquinone CELAMERCK GmbH & CO KG 11 Sept 1973 [12 Sept 1972] 42593/73 Heading C2C 2,3 - Dicyano - 1,4 - dithiaanthrahydroquinone is prepared by reacting a salt of 1,2-dicyano- 1,2-dimereaptoethene with 2-chloronaphthoquinone-(1,4) in the presence of an acid. Preferred salts are the alkali metal or ammonium salts. The reaction is preferably effected in an aqueous suspension. The 2,3-dicyano-1,2-dithiaanthrahydroquinone may be dehydrogenated with an oxidizing agent such as chromic acid, iron (III)-bichromate in the presence of dilute sulphuric acid or iron (III)-chloride to give 2,3-dicyano-1,4-dithiaanthraquinone.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE2244652A DE2244652C3 (en) | 1972-09-12 | 1972-09-12 | Process for the preparation of 2,3-dicyano-1,4-dithiaanthrahydroquinone and anthraquinone |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB1432827A true GB1432827A (en) | 1976-04-22 |
Family
ID=5856080
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB4259373A Expired GB1432827A (en) | 1972-09-12 | 1973-09-11 | Process for the production of 2,3-dicyano-1,4-dithiaanthrahydro quinone and -anthraquinone |
Country Status (5)
| Country | Link |
|---|---|
| JP (1) | JPS4992076A (en) |
| CH (1) | CH584708A5 (en) |
| DE (1) | DE2244652C3 (en) |
| GB (1) | GB1432827A (en) |
| IL (1) | IL43200A (en) |
-
1972
- 1972-09-12 DE DE2244652A patent/DE2244652C3/en not_active Expired
-
1973
- 1973-09-07 CH CH1292773A patent/CH584708A5/xx not_active IP Right Cessation
- 1973-09-11 JP JP48102542A patent/JPS4992076A/ja active Pending
- 1973-09-11 IL IL43200A patent/IL43200A/en unknown
- 1973-09-11 GB GB4259373A patent/GB1432827A/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| DE2244652A1 (en) | 1974-03-21 |
| JPS4992076A (en) | 1974-09-03 |
| IL43200A (en) | 1976-08-31 |
| DE2244652C3 (en) | 1981-03-19 |
| IL43200A0 (en) | 1973-11-28 |
| CH584708A5 (en) | 1977-02-15 |
| DE2244652B2 (en) | 1980-07-31 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PS | Patent sealed [section 19, patents act 1949] | ||
| PCNP | Patent ceased through non-payment of renewal fee |