Process for the acylation of lactams
US5510477A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Mar 1, 1994 |
| Grant date | Apr 23, 1996 |
| Priority date | — |
| Expiry date | Mar 1, 2014 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02P20/52
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
High quality acyl lactam imides are prepared by reacting an acyl lactam of the formula ##STR1## where 5 carbon atoms and an acylating acid of the formula R'CO.sub.2 H or by reacting a lactam, an anhydride of the formula (RCO).sub.2 O where R is 1 to 5 carbon atoms and an acylating acid, preferably in the presence of a base catalyst. The process affords acyl lactam imides in high yield and at lower reaction temperatures by providing for the removal of volatile carboxylic acid by-products under vacuum or by the use of a stripping gas. The acyl lactam imides are particularly suited for use as bleach activators in detergent compositions.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.