GB702016A - Manufacture of a stable preparation of the molecular compound of 4-dimethylamino-1-phenyl-2:3-dimethyl-5-pyrazolone and butyl-chloral hydrate - Google Patents
Manufacture of a stable preparation of the molecular compound of 4-dimethylamino-1-phenyl-2:3-dimethyl-5-pyrazolone and butyl-chloral hydrateInfo
- Publication number
- GB702016A GB702016A GB27839/51A GB2783951A GB702016A GB 702016 A GB702016 A GB 702016A GB 27839/51 A GB27839/51 A GB 27839/51A GB 2783951 A GB2783951 A GB 2783951A GB 702016 A GB702016 A GB 702016A
- Authority
- GB
- United Kingdom
- Prior art keywords
- molecular compound
- pyrazolone
- dimethylamino
- dimethyl
- phenyl
- 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
- Addition Polymer Or Copolymer, Post-Treatments, Or Chemical Modifications (AREA)
Abstract
A stable preparation of the molecular compound of 4-dimethylamino-1-phenyl-2.3-dimethyl-5-pyrazolone and butyl-chloral hydrate is prepared by adding trisodium phosphate or hexamethylene tetramine as a stabilizing agent to the molecular compound during or after its manufacture from the components. The stabilized compound may be prepared by reacting butyl-chloral hydrate at a temperature of 30-35 DEG C. with 4-dimethylamino-1-phenyl-2 : 3-dimethyl-5-pyrazolone in the presence of a solvent and with the addition of 1-2 per cent. of the stabilizing agent. If desired, the stabilizing agent may be added to the finished molecular compound. Preferably the butyl-chloral hydrate contains less than 0.1 per cent. of free hydrochloric acid. In the examples the molecular compound of 4-dimethylamino-1-phenyl-2 : 3-dimethyl-5-pyrazolone and butylchloral hydrate is stabilized by the addition of hexamethylene tetramine (a) during the preparation of the compound and (b) after separating the molecular compound. Specification 15782/03 , [Class 2], is referred to.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE702016X | 1950-11-27 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB702016A true GB702016A (en) | 1954-01-06 |
Family
ID=6611981
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB27839/51A Expired GB702016A (en) | 1950-11-27 | 1951-11-27 | Manufacture of a stable preparation of the molecular compound of 4-dimethylamino-1-phenyl-2:3-dimethyl-5-pyrazolone and butyl-chloral hydrate |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB702016A (en) |
-
1951
- 1951-11-27 GB GB27839/51A patent/GB702016A/en not_active Expired
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