- Preparation method of 3,3,3-trifluoropropylene carbonate
-
The invention discloses a preparation method of 3,3,3-trifluoropropylene carbonate. The preparation method comprises the steps: with trifluoropropylene as a raw material, carrying out several simple reaction steps to obtain trifluoroepoxy propane, introducing carbon dioxide into a high-pressure reaction kettle by taking a metal conjugated microporous polymer complex as a catalyst, and preparing 3,3,3-trifluoropropylene carbonate at the temperature of 25-100 DEG C and the pressure of 0.1Mpa-3Mpa. Compared with the prior art, the method has the advantages that trifluoropropylene is taken as theraw material, so that the raw material cost is substantially lowered; and meanwhile, the yield is relatively high, and the catalyst can be repeatedly used, so that the method is suitable for industrial production.
- -
-
Paragraph 0067-0069
(2019/03/08)
-
- Preparative-scale synthesis of 3,3,3-trifluoropropene oxide
-
Bromination of 3,3,3-trifluoropropene in 20% oleum, followed by treatment with acetic acid furnishes 2-bromo-3,3,3-trifluoropropyl acetate in quantitative yield, which upon acid hydrolysis and cyclization with alkali affords 3,3,3-trifluoropropene oxide (TFPO) in 63% overall yield.
- Ramachandran, P. Veeraraghavan,Padiya, Kamlesh J.
-
p. 1255 - 1259
(2008/02/10)
-
- Methods for preparing Halohydrins and methods for preparing Epoxides
-
The invention includes methods for preparing halohydrins and epoxides. A method of preparing halohydrins can include exposing (R1CHXCH2O—)2SO2 to R2COOH to produce R1CHXCH2COOR2 and hydrolyzing the R1CHXCH2COOR2 to produce the halohydrin R1CHXCH2OH. R1 and R2 can be the same or different single elements and/or organic groups and X can be a halogen. A method of preparing an epoxide can include combining a sulfuric acid containing solution with a halogen to produce a first mixture and exposing the first mixture to trifluoropropene to produce a second mixture. The second mixture can be combined with acetic acid to produce an acetyl halohydrin of trifluoropropene and the acetyl halohydrin can be hydrolyzed to form a halohydrin of trifluoropropene. The halohydrin can be converted to a trifluoropropyl epoxide.
- -
-
Page/Page column 2
(2010/11/29)
-
- Novel method for the synthesis of (trifluoromethyl)oxirane
-
The reaction of 3,3,3-trifluoropropene with N-bromosuccinimide in acetic acid at 65-70 deg C affords 3-acetoxy-2-bromo-1,1,1-trifluoropropane. When treated with an alkali, the latter is readily converted into (trifluoromethyl)oxirane.
- Lermontov, S. A.,Kuryleva, N. V.,Velikokhat'ko, T. N.
-
p. 550 - 551
(2007/10/03)
-