Method for the preparation of an N-vinyl compound
US5708167A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Aug 23, 1995 |
| Grant date | Jan 13, 1998 |
| Priority date | — |
| Expiry date | Aug 23, 2015 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07D263/22
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
Proposed is a novel and very efficient method for the preparation of an N-vinyl compound such as N-vinyl-2-pyrrolidone and N-vinyl-N-ethyl acetamide by the thermal decomposition of an N-(.alpha.-acyloxyethyl) compound which is a novel compound obtained by the addition reaction between an NH group-containing compound such as 2-pyrrolidone and N-ethyl acetamide and a vinyl carboxylate, e.g., vinyl acetate, in the presence of an alkali, e.g. alkali metal hydroxide. The reaction mixture after completion of this addition reaction as such, i.e. without isolating the N-(.alpha.-acyloxyethyl) compound, such as N-(.alpha.-acetoxyethyl)-2-pyrrolidone and N-(.alpha.-acetoxyethyl)-N-ethyl acetamide, is heated to effect in situ formation of the desired N-vinyl compound which can then be isolated by distillation under reduced pressure in a very high overall yield.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.