GB1393557A - Preparation of 1,4-diaminobenzene-2,5-disulphonic acid - Google Patents

Preparation of 1,4-diaminobenzene-2,5-disulphonic acid

Info

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
Application number
GB5841272A
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Hoechst AG
Original Assignee
Hoechst AG
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Hoechst AG filed Critical Hoechst AG
Publication of GB1393557A publication Critical patent/GB1393557A/en
Expired legal-status Critical Current

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.
GB5841272A 1971-12-18 1972-12-18 Preparation of 1,4-diaminobenzene-2,5-disulphonic acid Expired GB1393557A (en)

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)

* Cited by examiner, † Cited by third party
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

Cited By (7)

* Cited by examiner, † Cited by third party
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