Process for the preparation of C3-7 fluoroalkenes by base-mediated dehydrohalogenated C3-7 fluoroalkenes
AssigneeMexichem Amanco Holding S.A. de C.V.
InventorsAndrew Paul Sharratt, Robert Elliott Low, John Charles McCarthy
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Abstract
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.
Claims25
A process for preparing a C3-C7 (hydro)fluoroalkene, which process comprises dehydrohalogenating a linear or branched C3-C7 hydro(halo)fluoroalkane, in the presence of a base,
- wherein the process is carried out in the presence of a polar aprotic solvent comprising N-methyl pyrrolidone (NMP).
Dependencies are inferred from the claim text.