Method for preparing 2,3,3,3-tetrafluoropropene using methyl magnesium chloride
US10183903B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 24, 2015 |
| Grant date | Jan 22, 2019 |
| Priority date | — |
| Expiry date | Dec 24, 2035 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07C21/18
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
The present invention discloses a method for preparing 2,3,3,3-tetrafluoropropene using methylmagnesium chloride, comprising the following steps: 1) preparing 1,1,2-trifluoropropene (CH3CF═CF2); 2) preparing 1,1,1,2,2-pentafluoropane (CF3CF2CH3); 3) preparing 2,3,3,3-tetrafluoropropene (CF3CF═CH2). In the present invention, using a Grignard reagent, namely methylmagnesium chloride, and tetrafluoroethylene as starting raw materials, 2,3,3,3-tetrafluoropropene is prepared by three steps of nucleophilic addition-elimination, fluorine addition, and dehydrofluorination in sequence. The process flow is relatively short, and the product yield is high.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.