GB668736A - Process for the manufacture of products of the thiosemicarbazone series - Google Patents
Process for the manufacture of products of the thiosemicarbazone seriesInfo
- Publication number
- GB668736A GB668736A GB21236/49A GB2123649A GB668736A GB 668736 A GB668736 A GB 668736A GB 21236/49 A GB21236/49 A GB 21236/49A GB 2123649 A GB2123649 A GB 2123649A GB 668736 A GB668736 A GB 668736A
- Authority
- GB
- United Kingdom
- Prior art keywords
- thiosemicarbazone
- salt
- benzaldehyde
- alkanolamine
- reacting
- 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
- C07C319/00—Preparation of thiols, sulfides, hydropolysulfides or polysulfides
- C07C319/14—Preparation of thiols, sulfides, hydropolysulfides or polysulfides of sulfides
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
Abstract
Thiosemicarbazone derivatives are manufactured by reacting a thiosemicarbazone, obtained from thiosemicarbazide and a benzaldehyde containing a carboxyl group attached to the nucleus directly, or indirectly through a saturated or unsaturated aliphatic carbon chain, with an alkanolamine, or by reacting a salt (e.g. an alkaline-earth metal salt) of such a thiosemicarbazone with a salt (e.g. sulphate, carbonate or oxalate) of an alkanolamine, or by reacting thiosemicarbazide with an alkanolamine salt of a benzaldehyde carboxylic acid of the said kind. In examples: (1) benzaldehyde - thiosemicarbazone - 4 - carboxylic acid, 4-acetic acid or 4-acrylic acid is dissolved in water while adding diethanolamine, and the salt is isolated by concentrating the solution and adding alcohol; (2) the calcium salt of benzaldehyde - thiosemicarbazone - 3 - carboxylic acid is reacted with the neutral sulphate of diethanolamine in aqueous solution, the precipitated calcium sulphate is filtered off and the filtrate evaporated to dryness. Other alkanolamines specified are mono- and triethanolamine. The Specification as open to inspection under Sect. 91 comprises also a reference to the use of benzaldehyde - thiosemicarbazone - 4 - propionic acid, glucamine and methylglucamine as starting materials. This subject-matter does not appear in the Specification as accepted.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CH668736X | 1948-09-17 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB668736A true GB668736A (en) | 1952-03-19 |
Family
ID=4527496
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB21236/49A Expired GB668736A (en) | 1948-09-17 | 1949-08-15 | Process for the manufacture of products of the thiosemicarbazone series |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB668736A (en) |
-
1949
- 1949-08-15 GB GB21236/49A patent/GB668736A/en not_active Expired
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