Process for the industrial synthesis of vinyl and isopropenyl chloroformate and thiochloroformate
US4210598A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Feb 10, 1978 |
| Grant date | Jul 1, 1980 |
| Priority date | — |
| Expiry date | Feb 10, 1998 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07F3/10
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
The invention relates to a process for the industrial scale synthesis of vinyl and isopropenyl chloroformates and thiochloroformates. According to the invention, phosgene or thiophosgene is reacted, at between 20.degree. and 70.degree. C., with a mercury salt XHg(CH.sub.2 CRO), in which X=Cl or --CH.sub.2 CRO, where R=H or CH.sub.3, in the presence of a solvent or a mixture of solvents having a dielectric constant greater than 10. The process can also be carried out using a mixture of the above solvents with a solvent which is not effective by itself (solvent of low polarity) but which is inexpensive. The yields achieved can exceed 90%.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.