Vinyl chloroformates and preparation
US4808743A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Feb 13, 1987 |
| Grant date | Feb 28, 1989 |
| Priority date | — |
| Expiry date | Feb 13, 2007 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07C69/96
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
Vinyl chloroformates are described of formula ##STR1## in which: R.sub.1 .dbd.R.sub.2 .dbd.Cl, Br or a saturated 1-4 carbon atom alkyl or together they form a cycloaliphatic ring of 4-8 carbon atoms; PA1 R.sub.3 .dbd.H when R.sup.1 or R.sup.2 .dbd.alkyl; saturated alkyl of 1-4 carbon atoms or aryl; ##STR2## in which R.sub.4 .dbd.R.sub.5 .dbd.alkyl of 1-4 carbon atoms or R.sub.3 forms with R.sub.2 a C.sub.5 -C.sub.8 ring which may have attached oxygen atoms. The process of preparation consists of reacting phosgene with the corresponding compounds containing alpha halogen and a carbonyl group. The products are very useful to obtain vinyl carbonates and carbamates.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.