GB623242A - Improvements relating to the preparation of sulphuric esters - Google Patents
Improvements relating to the preparation of sulphuric estersInfo
- Publication number
- GB623242A GB623242A GB1028447A GB1028447A GB623242A GB 623242 A GB623242 A GB 623242A GB 1028447 A GB1028447 A GB 1028447A GB 1028447 A GB1028447 A GB 1028447A GB 623242 A GB623242 A GB 623242A
- Authority
- GB
- United Kingdom
- Prior art keywords
- naphthohydroquinone
- methyl
- treated
- preparation
- pyridine
- 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)
- Low-Molecular Organic Synthesis Reactions Using Catalysts (AREA)
Abstract
A salt of a sulphuric ester of a naphthohydroquinone or alkyl naphthohydroquinone is prepared by heating the hydroquinone with excess sulphamic acid in suspension in a tertiary amine, e.g. pyridine, quinoline, or dimethylaniline. A reaction temperature of 100 DEG C. is preferred. The resultant ammonium salt may be treated with a metal hydroxide to give the corresponding metal sulphate. In example 1, 2-methyl-1 : 4-naphthohydroquinone is treated with sulphamic acid in pyridine at 95 DEG C., and the product treated with aqueous potassium hydroxide to give dipotassium 2-methyl-1 : 4-naphthylene disulphate dihydrate. Example 2 is similar, but includes the preparation of 2-methyl-1 : 4-naphthohydroquinone by hydrogenation, in the presence of a palladium catalyst, of 2-methyl-1 : 4-naphthoquinone. According to the Provisional Specification, the process may be applied to any compound containing two phenolic hydroxyl groups attached to the same nucleus.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB1028447A GB623242A (en) | 1947-04-17 | 1947-04-17 | Improvements relating to the preparation of sulphuric esters |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB1028447A GB623242A (en) | 1947-04-17 | 1947-04-17 | Improvements relating to the preparation of sulphuric esters |
Publications (1)
Publication Number | Publication Date |
---|---|
GB623242A true GB623242A (en) | 1949-05-13 |
Family
ID=9965017
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB1028447A Expired GB623242A (en) | 1947-04-17 | 1947-04-17 | Improvements relating to the preparation of sulphuric esters |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB623242A (en) |
-
1947
- 1947-04-17 GB GB1028447A patent/GB623242A/en not_active Expired
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