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US 11,377,432 B2Granted
Method for preparing a tetrafluoro-1,2-epoxypropane
AssigneeMexichem Fluor S.A.De C.V.
InventorsJames Henry Murray, Andrew Paul Sharratt
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Abstract
A method for preparing atetrafluoro-1,2-epoxypropane comprising reacting a 2-bromo-tetrafluoropropan-3-ol with an alkaline or alkaline earth metal hydroxide solution, a compound which is 2,3,3,3-tetrafluoro-1,2-epoxypropane, and partially fluorinated polyethers of formula [OCRR1CR2R3]n wherein n is from 5 to 100, R is F or H, R1 is CF3, R2 is F or H and R3 is H.
Claims4
A method for preparing a tetrafluoro-1,2-epoxypropane comprising
- reacting 3-acetoxy-2-bromo-1,1,1,2-tetrafluoropropane or 3-acetoxy-2-bromo-1,1,1,3-tetrafluoropropane with sulphuric acid in an aqueous solution to provide a 2-bromo-tetrafluoropropan-3-ol wherein the 2-bromo-tetrafluoropropan-3-ol is selected from the group consisting of 2-bromo-1,1,1,2-tetrafluoropropan-3-ol, 2-bromo-1,1,1,3-tetrafluoropropan-3-ol, and combination thereof, and
- reacting the 2-bromo-tetrafluoropropan-3-ol with an alkaline or alkaline earth metal hydroxide solution to provide a tetrafluoro-1,2-epoxypropane.
A method for preparing a 2-bromo-tetrafluoropropan-3-ol comprising
- reacting 3-acetoxy-2-bromo-1,1,1,2-tetrafluoropropane or 3-acetoxy-2-bromo-1,1,1,3-tetrafluoropropane with sulphuric acid in an aqueous solution to provide a 2-bromo-tetrafluoropropan-3-ol wherein the 2-bromo-tetrafluoropropan-3-ol is selected from the group consisting of 2-bromo-1,1,1,2-tetrafluoropropan-3-ol, 2-bromo-1,1,1,3-tetrafluoropropane-3-ol, and combination thereof.
Dependencies are inferred from the claim text.