JPS55129249A - Preparation of 1-amino-2-bromo-4-hydroxyanthraquinone - Google Patents
Preparation of 1-amino-2-bromo-4-hydroxyanthraquinoneInfo
- Publication number
- JPS55129249A JPS55129249A JP3754879A JP3754879A JPS55129249A JP S55129249 A JPS55129249 A JP S55129249A JP 3754879 A JP3754879 A JP 3754879A JP 3754879 A JP3754879 A JP 3754879A JP S55129249 A JPS55129249 A JP S55129249A
- Authority
- JP
- Japan
- Prior art keywords
- amino
- sulfuric acid
- hydroxyanthraquinone
- bromo
- acid
- 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.)
- Pending
Links
Landscapes
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
Abstract
PURPOSE: To obtain the title compound, useful as an intermediate for the synthesis of compounds for disperse dyes, easily, by heating a specific compound obtained by monobromination (not by dibromination) of 1-aminoanthraquinone, in concentrated sulfuric acid in the presence of boric acid.
CONSTITUTION: 1-Amino-2-bromoanthraquinone is heated at 140W180°C in concentrated sulfuric acid or fuming sulfuric acid, preferably 90% concentrated sulfuric acid or 3% fuming sulfuric acid (esp. 94W100% sulfuric acid is used in an amount of 4W25wt part, preferably 5W10 weight part, based on 1 part of 1-amino-2-bromanthraquinone), in the presence of boric acid to give 1-amino-2-bromo-4-hydroxyanthraquinone. The starting material, 1-amino-20-bromoanthraquinone, is obtained by treating 1-aminoanthraquinone with 1mol of bromine in glacial acetic acid, and heating the product.
COPYRIGHT: (C)1980,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP3754879A JPS55129249A (en) | 1979-03-28 | 1979-03-28 | Preparation of 1-amino-2-bromo-4-hydroxyanthraquinone |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP3754879A JPS55129249A (en) | 1979-03-28 | 1979-03-28 | Preparation of 1-amino-2-bromo-4-hydroxyanthraquinone |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS55129249A true JPS55129249A (en) | 1980-10-06 |
Family
ID=12500569
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP3754879A Pending JPS55129249A (en) | 1979-03-28 | 1979-03-28 | Preparation of 1-amino-2-bromo-4-hydroxyanthraquinone |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS55129249A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2817890A1 (en) * | 1977-04-25 | 1978-10-26 | Sumitomo Chemical Co | PROCESS FOR THE PREPARATION OF 1-AMINO-2-BROMO-4-HYDROXY-ANTHRACHINONE |
EP0160162A1 (en) * | 1984-04-28 | 1985-11-06 | Bayer Ag | Process for preparing 1-amino-2-bromo-4-hydroxy-anthraquinone |
-
1979
- 1979-03-28 JP JP3754879A patent/JPS55129249A/en active Pending
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2817890A1 (en) * | 1977-04-25 | 1978-10-26 | Sumitomo Chemical Co | PROCESS FOR THE PREPARATION OF 1-AMINO-2-BROMO-4-HYDROXY-ANTHRACHINONE |
EP0160162A1 (en) * | 1984-04-28 | 1985-11-06 | Bayer Ag | Process for preparing 1-amino-2-bromo-4-hydroxy-anthraquinone |
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