Disclosed is a process for the synthesis of fluorinated olefins, and in particularly preferred embodiments tetrafluorinated olefins having F on an unsaturated, non-terminal carbon, such as 2,3,3,3-tetrafluoropropene. The preferred processes of the present invention in accordance with one embodiment generally comprise:
(a) reacting a compound of formula (I)
X
1
X
2
(I)
with a compound of formula (II)
CX
1
X
2
X
3
CX
1
═CX
1
X
2
(II)
to produce a reaction product comprising a compound of formula (III)
CF
3
CHX
1
CH
2
X
2
(III), and
(b) exposing said compound of formula (III) to reaction conditions effective to convert said compound of formula (III) to a compound of formula (IV)
CF
3
CZ=CH
2
(IV)
wherein X
1
, X
2
, and X
3
are each independently selected from the group consisting of hydrogen, chlorine, bromine, fluorine and iodine, provided that X
1
and X
2
in formula (I) are not both hydrogen and Z is Cl, I, Br, or F.
揭示了一种合成
氟代烯烃的过程,特别是优选实施方式中的四
氟代烯烃,其在不饱和的非末端碳上具有F,例如
2,3,3,3-四氟丙烯。根据一种实施方式,本发明的优选方法通常包括:
(a) 将具有式(I)的化合物
X
1
X
2
(I)
与具有式(II)的化合物
CX
1
X
2
X
3
CX
1
═CX
1
X
2
(II)
反应,以产生包含具有式(III)的化合物的反应产物
CF
3
CHX
1
CH
2
X
2
(III),以及
(b) 将所述具有式(III)的化合物暴露于有效的反应条件,以将所述具有式(III)的化合物转化为具有式(IV)的化合物
CF
3
CZ=CH
2
(IV)
其中X
1
,X
2
和X
3
各自独立地选自氢,
氯,
溴,
氟和
碘的组,前提是在式(I)中X
1
和X
2
不都是氢,Z是Cl,I,Br或F。