GB710201A - Improvements in or relating to new derivatives of pyridine aldehydes - Google Patents
Improvements in or relating to new derivatives of pyridine aldehydesInfo
- Publication number
- GB710201A GB710201A GB3274/52A GB327452A GB710201A GB 710201 A GB710201 A GB 710201A GB 3274/52 A GB3274/52 A GB 3274/52A GB 327452 A GB327452 A GB 327452A GB 710201 A GB710201 A GB 710201A
- Authority
- GB
- United Kingdom
- Prior art keywords
- pyridine
- aldehydes
- addition
- sulphur dioxide
- compounds
- 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
- Pharmaceuticals Containing Other Organic And Inorganic Compounds (AREA)
Abstract
The invention comprises addition compounds of pyridine aldehydes, of typical formula <FORM:0710201/IV (b)/1> prepared by treatment of pyridine aldehydes or mixtures of the same with sulphur dioxide and water, when the sparingly soluble addition compounds separate. Acid salts or weakly acid solutions of the aldehydes may be treated likewise. The addition compounds can also be prepared by treatment of the corresponding alkali bisulphite compounds with dilute mineral or organic acids, e.g. citric or acetic acid. The above reactions may be conducted in organic solvents, e.g. alcohol, benzene, provided at least one molecule of water is present. In examples: (1) a mixture of b -, g - and a 1-methyl-a -pyridine aldehydes in 90 per cent aqueous solution is treated with sulphur dioxide, when the addition compounds separate. Other examples are given, treating a -pyridine aldehyde, its hydrochloride, or g -pyridine aldehyde in aqueous alcoholic or benzolic solution with sulphur dioxide; and treating the sodium bisulphite addition compound of b -pyridine aldehyde with 5N sulphuric acid, the required addition product separating from solution in all cases. Specification 710,192 is referred to.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE710201X | 1951-03-12 |
Publications (1)
Publication Number | Publication Date |
---|---|
GB710201A true GB710201A (en) | 1954-06-09 |
Family
ID=6618333
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB3274/52A Expired GB710201A (en) | 1951-03-12 | 1952-02-07 | Improvements in or relating to new derivatives of pyridine aldehydes |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB710201A (en) |
-
1952
- 1952-02-07 GB GB3274/52A patent/GB710201A/en not_active Expired
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