PROCESSES FOR SYNTHESIS OF 1,3,3,3-TETRAFLUOROPROPENE AND 2,3,3,3-TETRAFLUOROPROPENE

摘要

Disclosed in one embodiment is a process for the synthesis of 1,3,3,3-
tetrafluoropropene that comprises (a) reacting a compound of formula (I) X1X2
with a compound of formula (II) CF3CH=CH2 to produce a reaction product
comprising a compound of formula (III) CF3CHX1CH2X2, wherein X1 and X2 are
each independently selected from the group consisting of hydrogen, chlorine,
bromine and iodine, provided that X1 and X2 are not both hydrogen; (b) when X2
in formula (III) is not fluorine, fluorinating the compound of formula (III)
to produce a reaction product comprising a compound of formula (III) wherein
X1 is as described above and X2 is fluorine; and (c) exposing said compound of
formula (III) to reaction conditions effective to convert said compound to
1,3,3,3,-tetrafluoropropene. In another embodiment, the process comprises (a)
reacting chlorine with a compound of formula (I) CH3CH=CH2 to produce a
reaction product comprising a compound of formula (II) CCI3CHC1CH2C1; (b)
fluorinating the compound of formula (II) to produce a reaction product
comprising a compound of formula (III) CF3CHC1CH2F; and (c) exposing said
compound of said formula (III) to reaction conditions effective to convert
said compound to 1,3,3,3-tetrafluoropropene.