Process for preparation of .alpha.-acetoxy-.alpha.-methyl-N,N'-diacetyl malonamide
US4943654A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jan 15, 1986 |
| Grant date | Jul 24, 1990 |
| Priority date | — |
| Expiry date | Jan 15, 2006 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07C255/00
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
Process for the preparation of .alpha.-acetoxy-.alpha.-methyl-N,N'-diacetylmalonamide wherein hydrocyanic acid or a cyanide is reacted in a first step with acetic anhydride and then in a second step the reaction mixture so obtained is treated with acetic acid in the presence of an acid catalyst, wherein the first step is carried out in the presence of a catalyst based on anion exchange resins in which the functional groups are quaternary ammonium or tertiary amine, such .alpha.-acetoxy-.alpha.-methyl-N,N'-diacetylmalonamides being very useful as activators in bleaching and cleaning compositions which are thus active at lower temperatures.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.