Process for the preparation of 5-(4-aminobutyl) hydantoin and/or 1-ureido-5-aminocapronamide
US4119782A · kind A · utility
1Cited by
4References
4Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Apr 4, 1977 |
| Grant date | Oct 10, 1978 |
| Priority date | — |
| Expiry date | Apr 4, 1997 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07C273/1854
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
5-(4-Aminobutyl) hydantoin is prepared by hydrogenation of 5-(3-cyanopropyl) hydantoin in the liquid phase with a catalyst and ammonia in the presence of greater than 0.4 up to about 2.0 of a dissolved alkali hydroxide per mole of hydantoin to be hydrolyzed. Use of the stated quantity of alkali hydroxide avoids catalyst loss by dissolution yet maintains hydrogenation efficiency.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.