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)
- Hydrogenated Pyridines (AREA)
- Low-Molecular Organic Synthesis Reactions Using Catalysts (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
Similar Documents
Publication | Publication Date | Title |
---|---|---|
GB1377192A (en) | Hydrogenation process for the preparation of aliphatic diamines | |
GB810165A (en) | Process for the preparation of lactams | |
ES452377A1 (en) | Process for preparing alpha-amino-gamma-methylmercaptobutyronitrile | |
GB1020492A (en) | A process for the preparation of ornithine | |
GB1435894A (en) | Production of isocyanates | |
ES476964A1 (en) | Process for preparing 2-pyrrolidone | |
GB939905A (en) | A process for preparing a penillic acid and salts thereof | |
GB947842A (en) | Improved process for the preparation of nitrocyclohexane | |
GB1018187A (en) | Improvements in or relating to methods of producing 2,6-dichlorobenzonitrile | |
GB895681A (en) | Improvements in the preparation of glycolonitrile | |
BG33282A3 (en) | Method for obtaining of 4- amino- 5- chlorine- 1- phenylpyridazon- (6) | |
GB981123A (en) | Improved process for the preparation of nitriles | |
GB1272499A (en) | Process for the production of alkyl guanidine and n,n-dialkylguanidine hydrochlorides | |
GB1156158A (en) | Production of omega-Hydroxyalkane- and omega-Hydroxyalkene-Carbonitriles | |
GB938346A (en) | Hydrogenation of butyne-2-diol, 1, 4 to butene-2-diol, 1, 4 | |
GB951275A (en) | Process for the production of glycolic acid nitrile from methyl semiformal and hydrocyanic acid | |
GB1256394A (en) | Continuous production of monoethanolamine | |
GB622559A (en) | Improvements in or relating to a process of producing diphenylacetonitrile and the product resulting therefrom | |
GB1092632A (en) | Improved process for the production of n-methylol formamide | |
GB895088A (en) | Improvements in and relating to the production of epsilon-caprolactam | |
ES398641A1 (en) | A procedure for preparation of dinitro-orto-ammonium cresolate. (Machine-translation by Google Translate, not legally binding) | |
GB899370A (en) | A process for the production of tropolone | |
GB1091365A (en) | Process for producing 5-guanylic acid | |
GB793098A (en) | Manufacture of polymers of aminoacetic acid | |
GB885692A (en) | Improvements in or relating to the production of urea |