Process for preparing unsaturated esters containing cyclic epoxy group
US6124483A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Dec 23, 1996 |
| Grant date | Sep 26, 2000 |
| Priority date | — |
| Expiry date | Dec 23, 2016 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08G59/24
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
Process of making compounds of the formula ##STR1## wherein R.sub.1 =(C.sub.1 -C.sub.6) alkyl; PA1 X=O, S, NH; PA1 R.sub.2 =divalent saturated organic group; PA1 Y=O, S, NH, ester; PA1 R.sub.3 =cyclic moiety containing oxirane group; comprising reacting a compound of the formula ##STR2## wherein R.sub.4 is a cyclic moiety containing C.dbd.C group with hydrogen peroxide in the presence of (a) tungstic acid, (b) phosphoric acid or its metal salts, and (c) at least one phase transfer catalyst; PA1 polymers of compounds of formula I; and PA1 compounds of formula I except for compounds wherein R.sub.4 is a dicyclopentenyl epoxide, Y is O, R.sub.2 is --CH.sub.2 CH.sub.2 --, X is O, and R.sub.1 is H or methyl.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.