申请人:Tortelli Vito
公开号:US20070149827A1
公开(公告)日:2007-06-28
A process for preparing fluorovinylethers having general formula:
RfO—CF═CF
2
(IA)
wherein R
f
is a fluorinated or perfluorinated alkyl or cycloalkyl substituent; comprising the following reaction steps:
1) reaction of a hypofluorite of formula RfOF, wherein Rf is as above, with an olefin of formula:
CY″Y═CY′CI (II)
wherein Y, Y′ and Y″, equal to or different from each other, are H, Cl, Br, with the proviso that Y, Y′ and Y″ are not contemporaneously hydrogen;
2) dehalogenation or dehydrohalogenation of the fluorohalogenethers obtained in step 1) and obtainment of vinyl ethers of formula:
RfO—CY
I
═CY
II
F (IV)
wherein Y
I
and Y
II
, equal to or different from each other, have the meaning of H, Cl, Br with the proviso that Y
I
and Y
II
are not both H;
3) fluorination with fluorine of the vinyl ethers (IV) and obtainment of fluorohalogenethers of formula:
RfO—CFY
I
—CF
2
Y
II
(I)
wherein Y
I
, Y
II
, equal to or different from each other, are Cl, Br, H with the proviso that Y
I
and Y
II
cannot be contemporaneously equal to H;
4) dehalogenation or dehydrohalogenation of the fluorohalogenethers (I) and obtainment of the fluorovinylethers (IA).
一种制备具有一般式:RfO—CF═CF2(IA)的氟乙烯醚的过程,其中Rf是氟化或全氟化的烷基或环烷基取代基;包括以下反应步骤:1)将具有化学式RfOF的次氟醚(其中Rf如上所述)与具有化学式:CY″Y═CY′CI (II)的烯烃反应,其中Y,Y′和Y″相等或不同,为H,Cl,Br,但Y,Y′和Y″不可同时为氢;2)将步骤1)中获得的氟卤乙醚脱卤或脱氢卤,并获得具有化学式:RfO—CYI═CYIIF (IV)的乙烯醚,其中YI和YII相等或不同,具有H,Cl,Br的含义,但YI和YII不可同时为H;3)用氟气对乙烯醚(IV)进行氟化,并获得具有化学式:RfO—CFYI—CF2YII(I)的氟卤乙醚,其中YI,YII相等或不同,为Cl,Br,H,但YI和YII不可同时为H;4)将氟卤乙醚(I)脱卤或脱氢卤,并得到氟乙烯醚(IA)。