Method for preparing a tetrafluoro-1,2-epoxypropane
US-11718597-B2 · Aug 8, 2023 · US
Method for preparing a tetrafluoro-1,2-epoxypropane
US11377432B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-11377432-B2 |
| Application number | US-201816608149-A |
| Country | US |
| Kind code | B2 |
| Filing date | Apr 27, 2018 |
| Priority date | Apr 27, 2017 |
| Publication date | Jul 5, 2022 |
| Grant date | Jul 5, 2022 |
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Abstract
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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.
First claim
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The invention claimed is: 1. 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. 2. The method according to claim 1 , further comprising reacting 1234yf or 1234ze with N-bromosuccinimide in a solution of acetic acid and sulphuric acid to provide the 3-acetoxy-2-bromo-1,1,1,2-tetrafluoropropane or 3-acetoxy-2-bromo-1,1,1,3-tetrafluoropropane. 3. 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. 4. The method according to claim 3 , further comprising reacting 1234yf or 1234ze with N-bromosuccinimide in a solution of acetic acid and sulphuric acid to provide the 3-acetoxy-2-bromo-1,1,1,2-tetrafluoropropane or 3-acetoxy-2-bromo-1,1,1,3-tetrafluoropropane.
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Classifications
- C07D301/26Primary
Y being hydrogen · CPC title
containing halogen · CPC title
containing fluorine · CPC title
Cyclic ethers having at least one atom other than carbon and hydrogen outside the ring · CPC title
with hetero atoms or with carbon atoms having three bonds to hetero atoms with at the most one bond to halogen, directly attached to ring carbon atoms, e.g. ester or nitrile radicals · CPC title
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- What does patent US11377432B2 cover?
- 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.
- Who is the assignee on this patent?
- Mexichem Fluor Sa De Cv
- What technology area does this patent fall under?
- Primary CPC classification C07D301/26. Mapped technology areas include Chemistry & Metallurgy.
- When was this patent published?
- Publication date Tue Jul 05 2022 00:00:00 GMT+0000 (Coordinated Universal Time) (B2). Legal status and post-grant events are not shown on this page.
- What related patents are in patentsdb?
- We list 8 related publications on this page (citations in our corpus or others sharing the same primary CPC).