GB651585A - A new dyestuff intermediate - Google Patents
A new dyestuff intermediateInfo
- Publication number
- GB651585A GB651585A GB2012048A GB2012048A GB651585A GB 651585 A GB651585 A GB 651585A GB 2012048 A GB2012048 A GB 2012048A GB 2012048 A GB2012048 A GB 2012048A GB 651585 A GB651585 A GB 651585A
- Authority
- GB
- United Kingdom
- Prior art keywords
- nitro
- naphthoic acid
- keto
- tetrahydro
- 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.)
- Expired
Links
Landscapes
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
Abstract
6 - Nitro - 4 - keto - 1 : 2 : 3 : 4 - tetrahydro - 2 - naphthoic acid is manufactured by nitrating 4 - keto - 1 : 2 : 3 : 4 - tetrahydro - 2 - naphthoic acid. In an example, the nitration is effected with a mixture of nitric and sulphuric acid and the product is isolated by pouring the reaction mixture on to ice and filtering. 4 - Hydroxy - 6 - nitro - 2 - naphthoic acid is obtainable by brominating 6 - nitro - 4 - keto - 1 : 2 : 3 : 4-tetrahydro-2-naphthoic acid and dehydrohalogenating the product with diethylaniline. 6 - Amino - 4 - naphthol - 2 - carboxylic acid is obtainable by reduction of 4-hydroxy-6-nitro-2-naphthoic acid, e.g. with gaseous hydrogen in the presence of Raney nickel in alcoholic medium. 4-Nitrophthalic acid is obtainable by oxidation of 6-nitro-4-keto-1 : 2 : 3 : 4-tetrahydro-2-naphthoic acid in alkaline permanganate solution.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB2012048A GB651585A (en) | 1948-07-28 | 1948-07-28 | A new dyestuff intermediate |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB2012048A GB651585A (en) | 1948-07-28 | 1948-07-28 | A new dyestuff intermediate |
Publications (1)
Publication Number | Publication Date |
---|---|
GB651585A true GB651585A (en) | 1951-04-04 |
Family
ID=10140706
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB2012048A Expired GB651585A (en) | 1948-07-28 | 1948-07-28 | A new dyestuff intermediate |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB651585A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3102914A (en) * | 1959-06-18 | 1963-09-03 | American Cyanamid Co | 2-formylmethyl-4-oxo-tetra-hydronaphthalenes |
-
1948
- 1948-07-28 GB GB2012048A patent/GB651585A/en not_active Expired
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3102914A (en) * | 1959-06-18 | 1963-09-03 | American Cyanamid Co | 2-formylmethyl-4-oxo-tetra-hydronaphthalenes |
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