Process

Details Process Process

C - Chemistry, Metallurgy

07

C

C07C 17/25 (2006.01) C07C 21/18 (2006.01)

Patent

CA 2673585

The invention relates to a process for preparing a compound of formula CF3CF=CHX, CHX2CX=CX2 or a linear or branched C4-7 (hydro)fluoroalkene, wherein each X is, independently, H or F provided that in CHX2CX=CX2 at least one X is F, which process comprises dehydrohalogenating a compound of formula CF3CFYCH2X, CF3CFHCYHX, CHX2CXYCX2H, CHX2CXHCX2Y, or a linear or branched C4-7 hydro(halo)fluoroalkane, wherein each X is, independently, H or F provided that in CHX2CXYCX2H and CHX2CXHCX2Y at least one X is F, wherein Y is F, Cl, Br, or I, in the presence of a base.

La présente invention concerne un procédé de préparation d'un composé de formule CF3CF=CHX, CHX2CX=CX2 ou d'un (hydro)fluoroalcène en C4 à C7 linéaire ou ramifié, chaque X représentant, indépendamment, H ou F à condition que dans CHX2CX=CX2 au moins un X représente F. Ce procédé comprend la déshydrohalogénation d'un composé de formule CF3CFYCH2X, CF3CFHCYHX, CHX2CXYCX2H, CHX2CXHCX2Y, ou d'un hydro(halogéno)fluoroalcane en C4 à C7 linéaire ou ramifié, chaque X représentant, indépendamment, H ou F à condition que dans CHX2CXYCX2H et CHX2CXHCX2Y au moins un X représente F, Y représentant F, Cl, Br, ou I, en présence d'une base.

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