677-68-9Relevant academic research and scientific papers
PROCESS FOR PRODUCING FLUORINE-CONTAINING COMPOUND BY REARRANGEMENT REACTION
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Page/Page column 12, (2009/12/28)
The present invention provides a process for producing a compound represented by general formula (I): wherein X, Y and Z are same or different, and each represent H, F, Cl or an alkyl group, provided that the alkyl group and F are each not more than one; the process comprising contacting a fluorine-containing compound represented by general formula (II): wherein X, Y and Z are as defined above, with a Lewis acid catalyst to cause a chlorine rearrangement reaction. The present invention provides a novel reaction step, which can be used in the production process of a compound represented by the chemical formula CF3CF=CH2.
PROCESSES FOR THE SYNTHESIS OF 3-CHLOROPERFLUORO-2-PENTENE, OCTAFLUORO-2-PENTYNE, AND 1,1,1,4,4,5,5,5-OCTAFLUORO-2-PENTENE
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Page/Page column 14, (2009/07/18)
Disclosed is a process comprising reacting CF3CF2CCI2CF2CF3 (CFC-41 -10mca) with hydrogen in the presence of a dehalogenation catalyst to produce CF3CF2CCI=CFCF3 (CFC-1419myx). Also disclosed herein is a process comprising reacting CF3CF2CCI=CFCF3 (CFC- 1419myx) with hydrogen in the presence of a dehalogenation catalyst to produce CF3CF2C≡CCF3 (octafluoro-2-pentyne). Also disclosed herein is a process comprising reacting CF3CF2CCI2CF2CF3 (CFC-41 -10mca) with hydrogen in the presence of a dehalogenation catalyst to produce CF3CF2C≡CCF3 (octafluoro-2-pentyne). In addition, a process for reacting CF3CF2C≡CCF3, in a pressure vessel, with a Lindlar catalyst and hydrogen to produce CF3CF2CH=CHCF3 (1,1,1,4,4,5,5,5-octafluoro-2- pentene) is disclosed.
Thermal chlorofluorination of propyne and propadiene
Belter, Randolph K.
, p. 1611 - 1615 (2008/09/18)
Propyne and propadiene have been found to readily undergo vapor phase catalyzed chlorofluorination. At temperatures to 285 °C, the reaction forms mixtures of C3F4Cl4 isomers that differ in composition from mixtures obtained from either propane or propene.
Preparation of highly fluorinated cyclopropanes and ring-opening reactions with halogens
Yang, Zhen-Yu
, p. 4410 - 4416 (2007/10/03)
Various highly fluorinated cyclopropanes 1 were prepared by reaction of the appropriate fluorinated olefins with hexafluoropropylene oxide (HFPO) at 180 °C. The fluorinated nitrile le was converted to the triazine derivatives 2a and 2b by catalysis with Ag2O and NH3/(CF3CO)2O, respectively. The fluorinated cyclopropanes reacted with halogens at elevated temperatures to provide the first useful, general synthesis of 1,3-dihalopolyfluoropropanes. At 150-240 °C, hexafluorocyclopropane and halogens X2 produce XCF2CF2CF2X (X = Cl, Br, I) in 50-80% isolated yields. Pentafluorocyclopropanes c-C3F5Y [Y = Cl, OCF3, OC3F7 and OCF2CF(CF3)OCF2CF2Z; Z = SO2F, CN, CO2Me] react regiospecifically at 150 °C to give XCF2CF2CFXY, c-C3F5Br reacts regioselectively with Br2 to give a 16.7:1 mixture of BrCF2CF2 CFBr2:BrCF2CFBrCF2Br, whereas c-C3F5H reacts unselectively with I2 to produce a statistical 2:1 mixture of ICF2CF2CFHI:ICF2CFHCF2I. Tri- and di(pentafluorocyclopropyl) derivatives 2 also undergo ring-opening reaction with halogens to give 16 and 17. Upon treatment of tetrafluorocyclopropanes 1j, 1k, and 1l with Br2 or I2, ring opening occurred exclusively at substituted carbons to give XCF2CF2CXY2. Thermolysis of the ring-opened product ICF2CF2CFIORF at 240 °C gave RFI and ICF2CF2COF in high yields.
