GB1393557A - Preparation of 1,4-diaminobenzene-2,5-disulphonic acid - Google Patents
Preparation of 1,4-diaminobenzene-2,5-disulphonic acidInfo
- Publication number
- GB1393557A GB1393557A GB5841272A GB5841272A GB1393557A GB 1393557 A GB1393557 A GB 1393557A GB 5841272 A GB5841272 A GB 5841272A GB 5841272 A GB5841272 A GB 5841272A GB 1393557 A GB1393557 A GB 1393557A
- Authority
- GB
- United Kingdom
- Prior art keywords
- diaminobenzene
- disulphonic acid
- dec
- carried out
- sulphate
- 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
Abstract
1393557 1,4-Diaminobenzene-2,5-disulphonic acid HOECHST AG 18 Dec 1972 [18 Dec 1971] 58412/72 Heading C2C 1,4-Diaminobenzene-2,5-disulphonic acid or a salt thereof is obtained by reacting sodium bisulphate with a compound of the formula wherein A is H or an aliphatic carboxylic acyl radical containing up to 4 C atoms and B is H or SO 3 H, or a sulphate or bisulphate thereof, at from 180 to 270‹ C. The reaction may be carried out by heating an intimate mixture of the dry ground reactants to about 200 to 225‹ C. Reactions in which 1,4-phenylene diamine or the 2- sulpho derivative thereof or a corresponding sulphate is used may be carried out in a liquid having a boiling point within the reaction temperature range and in which neither the starting material nor the reaction product is soluble. Examples are given which illustrate the process.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19712162963 DE2162963C3 (en) | 1971-12-18 | 1971-12-18 | Process for the preparation of 1,4-diaminobenzene-2,5-disulfonic acid |
Publications (1)
Publication Number | Publication Date |
---|---|
GB1393557A true GB1393557A (en) | 1975-05-07 |
Family
ID=5828443
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB5841272A Expired GB1393557A (en) | 1971-12-18 | 1972-12-18 | Preparation of 1,4-diaminobenzene-2,5-disulphonic acid |
Country Status (5)
Country | Link |
---|---|
JP (1) | JPS5544742B2 (en) |
CH (1) | CH573403A5 (en) |
DE (1) | DE2162963C3 (en) |
FR (1) | FR2165584A5 (en) |
GB (1) | GB1393557A (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5276182A (en) * | 1990-07-09 | 1994-01-04 | The Dow Chemical Company | Process for preparing polyurea oligomers |
US5384119A (en) * | 1993-08-12 | 1995-01-24 | Merrell Dow Pharmaceuticals Inc. | Method of preventing neutrophil mediated connective tissue damage |
US5460807A (en) * | 1992-08-19 | 1995-10-24 | Merrell Dow Pharmaceuticals Inc. | Antiproliferative oligomers |
-
1971
- 1971-12-18 DE DE19712162963 patent/DE2162963C3/en not_active Expired
-
1972
- 1972-12-14 CH CH1824272A patent/CH573403A5/xx not_active IP Right Cessation
- 1972-12-15 JP JP12533172A patent/JPS5544742B2/ja not_active Expired
- 1972-12-18 FR FR7245008A patent/FR2165584A5/fr not_active Expired
- 1972-12-18 GB GB5841272A patent/GB1393557A/en not_active Expired
Cited By (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5276182A (en) * | 1990-07-09 | 1994-01-04 | The Dow Chemical Company | Process for preparing polyurea oligomers |
US5571505A (en) * | 1990-07-09 | 1996-11-05 | The Dow Chemical Company | Anti-HIV oligomers |
US5606108A (en) * | 1990-07-09 | 1997-02-25 | Merrell Pharmaceuticals Inc. | Process for preparing anionic polycarbonate and polyester oligomers having useful antiviral properties |
US5728874A (en) * | 1990-07-09 | 1998-03-17 | Merrell Pharmaceuticals, Inc. | Anti-HIV achiral polyurea oligomers, a process for creating them, formulations using them, and their use in the treatment of AIDS |
US6232349B1 (en) * | 1990-07-09 | 2001-05-15 | Merrell Pharamaceuticals Inc | Anti-herpes virus and cytomegalovirus polyurea oligomers |
US5460807A (en) * | 1992-08-19 | 1995-10-24 | Merrell Dow Pharmaceuticals Inc. | Antiproliferative oligomers |
US5384119A (en) * | 1993-08-12 | 1995-01-24 | Merrell Dow Pharmaceuticals Inc. | Method of preventing neutrophil mediated connective tissue damage |
Also Published As
Publication number | Publication date |
---|---|
JPS5544742B2 (en) | 1980-11-13 |
CH573403A5 (en) | 1976-03-15 |
DE2162963A1 (en) | 1973-06-20 |
JPS4867247A (en) | 1973-09-13 |
DE2162963C3 (en) | 1979-02-01 |
DE2162963B2 (en) | 1978-06-01 |
FR2165584A5 (en) | 1973-08-03 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
PS | Patent sealed | ||
PE20 | Patent expired after termination of 20 years |
Effective date: 19921217 |