申请人:SOLVAY SOLEXIS S.p.A
公开号:US20040186324A1
公开(公告)日:2004-09-23
A process for preparing (per)fluorohalogenethers having general formula (II):
R′CF
2
OCFA-CA′F
2
(II)
wherein:—
A and A′, equal to or different from each other, are H, Cl or Br but they cannot be both H; R′ has the following meanings: RO—, wherein R is a (per)fluorinated substituent, selected from the following groups: linear or branched C
1
-C
20
alkyl; C
3
-C
7
cycloalkyl; aromatic, C
6
-C
10
arylalkyl or alkylaryl; C
5
-C
10
heterocyclic or alkylheterocyclic; or a perfluoropolyether substituent T—R
f
— wherein T=—OCF
2
OCFA-CA′F
2
, —OCF
2
X
I
, wherein X
I
=F, CF
3
, Cl; R
f
is a perfluorooxyalkylene chain; by reaction of carbonyl compounds having formula R″COF (III) wherein R″=RO—, or R″=Q-R
f
— wherein Q=—OCOF, —OCF
2
X
I
; in liquid phase with elemental fluorine and with olefinic compounds having formula CAF=CA′F (IV), at temperatures from −
120
° C. to −
20
° C.
一种制备通式为(II)的(全)氟卤代醚的方法:
R′CF2OCFA-CA′F2(II)
其中:
-A和A',相同或不同,为H、Cl或Br,但不能同时为H;
-R′具有以下含义:RO—,其中R为(全)氟取代基,选自以下组:线性或支链C1-C20烷基;C3-C7环烷基;芳香族,C6-C10芳基烷基或烷基芳基;C5-C10杂环或烷基杂环;或全氟聚醚取代基T—Rf—,其中T=—OCF2OCFA-CA′F2、—OCF2XI,其中XI=F、CF3、Cl;Rf为全氟氧代烷基链;
通过将具有公式R″COF(III)的羰基化合物与液相中的元素氟和具有公式CAF=CA′F(IV)的烯烃化合物在-120℃至-20℃的温度下反应。