GB812256A - A carbamic acid ester having a sedative effect and methods for the preparation thereof - Google Patents
A carbamic acid ester having a sedative effect and methods for the preparation thereofInfo
- Publication number
- GB812256A GB812256A GB3059657A GB3059657A GB812256A GB 812256 A GB812256 A GB 812256A GB 3059657 A GB3059657 A GB 3059657A GB 3059657 A GB3059657 A GB 3059657A GB 812256 A GB812256 A GB 812256A
- Authority
- GB
- United Kingdom
- Prior art keywords
- carbinol
- reacting
- urea
- preparation
- acid ester
- 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
- C07C271/00—Derivatives of carbamic acids, i.e. compounds containing any of the groups, the nitrogen atom not being part of nitro or nitroso groups
- C07C271/06—Esters of carbamic acids
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
Abstract
The invention comprises phenyl-isopropyl-methyl carbamate and the preparation thereof by the following methods: (1) reacting phenyl-isopropyl-carbinol with cyanic acid, e.g. by heating with alkali metal cyanates in neutral solvents such as methylene chloride in the presence of acids such as trichloracetic acid; (2) reacting the carbinol at low temperatures with urea chloride or at elevated temperatures with urea, with or without the addition of heavy metal salts, e.g. zinc acetate, or with urea salts; (3) reacting the carbinol with urethanes such as ethyl urethane, with or without the addition of reaction accelerators such as sodium alcoholate, by heating; or (4) converting the carbinol to the chlorocarbonic acid ester thereof by means of phosgene, e.g. in a solvent such as toluene, and then reacting this ester with ammonia. Examples are given.
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB812256A true GB812256A (en) | 1959-04-22 |
Family
ID=1742151
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB3059657A Expired GB812256A (en) | 1957-09-30 | A carbamic acid ester having a sedative effect and methods for the preparation thereof |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB812256A (en) |
-
1957
- 1957-09-30 GB GB3059657A patent/GB812256A/en not_active Expired
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