GB1344796A - Process for the preparation of aromatic diamines - Google Patents
Process for the preparation of aromatic diaminesInfo
- Publication number
- GB1344796A GB1344796A GB3656472A GB3656472A GB1344796A GB 1344796 A GB1344796 A GB 1344796A GB 3656472 A GB3656472 A GB 3656472A GB 3656472 A GB3656472 A GB 3656472A GB 1344796 A GB1344796 A GB 1344796A
- Authority
- GB
- United Kingdom
- Prior art keywords
- preparation
- aromatic diamines
- water
- ethoxy
- hydrogen
- 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
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C209/00—Preparation of compounds containing amino groups bound to a carbon skeleton
- C07C209/30—Preparation of compounds containing amino groups bound to a carbon skeleton by reduction of nitrogen-to-oxygen or nitrogen-to-nitrogen bonds
- C07C209/32—Preparation of compounds containing amino groups bound to a carbon skeleton by reduction of nitrogen-to-oxygen or nitrogen-to-nitrogen bonds by reduction of nitro groups
- C07C209/36—Preparation of compounds containing amino groups bound to a carbon skeleton by reduction of nitrogen-to-oxygen or nitrogen-to-nitrogen bonds by reduction of nitro groups by reduction of nitro groups bound to carbon atoms of six-membered aromatic rings in presence of hydrogen-containing gases and a catalyst
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
- Low-Molecular Organic Synthesis Reactions Using Catalysts (AREA)
Abstract
1344796 Preparation of aromatic diamines FARBWERKE HOECHST AG 4 Aug 1972 [14 Aug 1971] 36564/72 Heading C2C Aromatic diamines of the general formula in which R<SP>1</SP> and R<SP>2</SP> which may be identical or different each represents a hydrogen atom or a methyl, ethyl, methoxy, ethoxy or trifluoromethyl group are prepared by catalytically reducing a corresponding nitroaniline of the formula with hydrogen in water in the presence of a compound which is alkaline in water preferably a salt of an alkali metal or alkaline earth metal with a weak acid or ammonia, e.g. an alkali metal or alkaline earth metal carbonate or hydrogen carbonate in a concentration of 5 to 20% by weight calculated from the total amount of water. The catalyst may be a nickel catalyst Many examples including the preparation of methoxy, ethoxy, methyl, trifluoromethyl substituted phenylene diamines are given.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19712140787 DE2140787C3 (en) | 1971-08-14 | Process for the production of aromatic diamines |
Publications (1)
Publication Number | Publication Date |
---|---|
GB1344796A true GB1344796A (en) | 1974-01-23 |
Family
ID=5816748
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB3656472A Expired GB1344796A (en) | 1971-08-14 | 1972-08-04 | Process for the preparation of aromatic diamines |
Country Status (5)
Country | Link |
---|---|
JP (1) | JPS5740134B2 (en) |
CH (1) | CH574900A5 (en) |
FR (1) | FR2150134A5 (en) |
GB (1) | GB1344796A (en) |
IT (1) | IT1047893B (en) |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2122607A (en) * | 1982-05-12 | 1984-01-18 | Magyar Asvanyolaj Es Foeldgaz | Preparation of o-phenylenediamine |
EP0252351A1 (en) * | 1986-07-07 | 1988-01-13 | Wella Aktiengesellschaft | 5-Alkoxy-2,4-diamino-alkylbenzenes and hair dyes containing same |
US5107022A (en) * | 1989-08-28 | 1992-04-21 | Ciba-Geigy Corporation | Process for the preparation of aromatic amines |
CN110272347A (en) * | 2019-07-18 | 2019-09-24 | 武汉本杰明医药股份有限公司 | A kind of synthetic method of N- methyl-o-phenylenediamine hydrochloride |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS49132685U (en) * | 1973-03-07 | 1974-11-14 |
-
1972
- 1972-08-04 GB GB3656472A patent/GB1344796A/en not_active Expired
- 1972-08-09 CH CH1178472A patent/CH574900A5/xx not_active IP Right Cessation
- 1972-08-12 JP JP8038872A patent/JPS5740134B2/ja not_active Expired
- 1972-08-12 IT IT2819472A patent/IT1047893B/en active
- 1972-08-16 FR FR7229329A patent/FR2150134A5/fr not_active Expired
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2122607A (en) * | 1982-05-12 | 1984-01-18 | Magyar Asvanyolaj Es Foeldgaz | Preparation of o-phenylenediamine |
EP0252351A1 (en) * | 1986-07-07 | 1988-01-13 | Wella Aktiengesellschaft | 5-Alkoxy-2,4-diamino-alkylbenzenes and hair dyes containing same |
WO1988000042A1 (en) * | 1986-07-07 | 1988-01-14 | Wella Ag | New 5-alkoxy-2,4-diamino-alkyl benzols, and hair tinting means using them |
US5107022A (en) * | 1989-08-28 | 1992-04-21 | Ciba-Geigy Corporation | Process for the preparation of aromatic amines |
CN110272347A (en) * | 2019-07-18 | 2019-09-24 | 武汉本杰明医药股份有限公司 | A kind of synthetic method of N- methyl-o-phenylenediamine hydrochloride |
Also Published As
Publication number | Publication date |
---|---|
IT1047893B (en) | 1980-10-20 |
JPS4828430A (en) | 1973-04-14 |
CH574900A5 (en) | 1976-04-30 |
DE2140787A1 (en) | 1973-02-22 |
DE2140787B2 (en) | 1976-08-05 |
JPS5740134B2 (en) | 1982-08-25 |
FR2150134A5 (en) | 1973-03-30 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
PS | Patent sealed | ||
PCNP | Patent ceased through non-payment of renewal fee |