GB810165A - Process for the preparation of lactams - Google Patents
Process for the preparation of lactamsInfo
- Publication number
- GB810165A GB810165A GB3027/57A GB302757A GB810165A GB 810165 A GB810165 A GB 810165A GB 3027/57 A GB3027/57 A GB 3027/57A GB 302757 A GB302757 A GB 302757A GB 810165 A GB810165 A GB 810165A
- Authority
- GB
- United Kingdom
- Prior art keywords
- water
- aminovaleronitrile
- hours
- used instead
- temperature
- 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
- C07C227/00—Preparation of compounds containing amino and carboxyl groups bound to the same carbon skeleton
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Low-Molecular Organic Synthesis Reactions Using Catalysts (AREA)
- Hydrogenated Pyridines (AREA)
Abstract
Butyrolactams and d -valerolactams, respectively, are formed by reacting substituted or unsubstituted g -aminobutyronitrile or d -aminovaleronitrile with water in the absence of a catalyst at a temperature of from 150 DEG to 180 DEG C. The reaction is advantageously effected under pressure and in the presence of excess water, preferably in the presence of more than two mols. of water per mol. of nitrile. Aqueous mixtures such as a solution of ammonia in water may be used instead of pure water. The process may be continuous or intermittent. In examples, d - aminovaleronitrile, with varying amounts of water, is heated over a period of 1 1/4 hours to 180 DEG C. in a shaker-type autoclave of V4A steel and maintained at this temperature for 4 hours, to produce d -valerolactam. In a further example, aqueous ammonia is used instead of water. Specification 560,040, [Group IV], is referred to.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE810165X | 1956-02-18 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB810165A true GB810165A (en) | 1959-03-11 |
Family
ID=6723962
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB3027/57A Expired GB810165A (en) | 1956-02-18 | 1957-01-28 | Process for the preparation of lactams |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB810165A (en) |
-
1957
- 1957-01-28 GB GB3027/57A patent/GB810165A/en not_active Expired
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