A process is disclosed for preparing an adduct of the formula R.sup.1 CF.sub.2 CH.sub.2 OCF.sub.3-a-m (C.sub.2 H.sub.n X.sub.4-n F).sub.m R.sup.2.sub.a wherein R.sup.1 is selected from the group consisting of --(CF.sub.2).sub.p H and --C.sub.p F.sub.2p+1 where p is 0 or an integer from 1 to 6; R.sup.2 is selected from the group consisting of --H, --CHF.sub.2, --CHFCF.sub.3, --CHFOCF.sub.3, --CHFO(CF.sub.2).sub.2 CF.sub.3, and --CHClF; each X is independently selected from the group consisting of Br, Cl and F; a is 0 or 1; m is 1 or 2, provided that when a is 1 and R.sup.2 is other than hydrogen, then m is 1; and n is 0, 1 or 2. The process involves reacting a fluorinated ether of the formula R.sup.1 CF.sub.2 CH.sub.2 OCF.sub.3-a R.sup.2.sub.a with an olefin of the formula C.sub.2 H.sub.n X.sub.4-n in the liquid phase in the presence of antimony pentafluoride catalyst. Also disclosed is a process for preparing unsaturated ethers of the formula R.sup.1 CF.sub.2 CH.sub.2 OCF.sub.3-a-m (C.sub.2 H.sub.n X.sub.4-n F).sub.m-q (C.sub.2 H.sub.n-1 X.sub.3-n F).sub.q R.sup.2.sub.a wherein R.sup.1, R.sup.2, X, a, m, and n are as indicated above, and q is an integer from 1 to m. The process involves contacting the fluorinated ether of the formula R.sup.1 CF.sub.2 CH.sub.2 OCF.sub.3-a-m (C.sub.2 H.sub.n X.sub.4-n F).sub.m R.sup.2.sub.a, provided that C.sub.2 H.sub.n X.sub.4-n F is selected from the group consisting of --CClFCClF.sub.2, --CCl.sub.2 CCl.sub.2 F, --CHClCCl.sub.2 F, --CHClCHClF and --CCl.sub.2 CHClF, with a dehalogenation catalyst. Certain unique saturated ethers of the formula R.sup.1 CF.sub.2 CH.sub.2 OCF.sub.3-a-m (C.sub.2 H.sub.n X.sub.4-n F).sub.m R.sup.2.sub.a and certain unique unsaturated ethers of the formula R.sup.1 CF.sub.2 CH.sub.2 OCF.sub.3-a-m (C.sub.2 H.sub.n X.sub.4-n F).sub.m-q (C.sub.2 H.sub.n-1 X.sub.3-n F).sub.q R.sup.2.sub.a are also disclosed.
本发明揭示了一种制备加合物的过程,其
化学式为R.sup.1 CF.sub.2 CH.sub.2 OCF.sub.3-a-m (C.sub.2 H.sub.n X.sub.4-n F).sub.m R.sup.2.sub.a,其中R.sup.1选自--(CF.sub.2).sub.p H和--C.sub.p F.sub.2p+1的群体,其中p为0或1至6的整数;R.sup.2选自--H、--CHF.sub.2、--CHFCF.sub.3、--CHFOCF.sub.3、--CHFO(CF.sub.2).sub.2 CF.sub.3和--CHClF的群体;每个X独立地选自Br、Cl和F的群体;a为0或1;m为1或2,但当a为1且R.sup.2不为氢时,则m为1;n为0、1或2。该过程涉及在
五氟化锑催化剂存在下,将
化学式为R.sup.1 CF.sub.2 CH.sub.2 OCF.sub.3-a R.sup.2.sub.a的
氟化醚与
化学式为C.sub.2 H.sub.n X.sub.4-n的烯烃在液相中反应。还揭示了一种制备不饱和醚的过程,其
化学式为R.sup.1 CF.sub.2 CH.sub.2 OCF.sub.3-a-m (C.sub.2 H.sub.n X.sub.4-n F).sub.m-q (C.sub.2 H.sub.n-1 X.sub.3-n F).sub.q R.sup.2.sub.a,其中R.sup.1、R.sup.2、X、a、m和n如上所示,q为1至m的整数。该过程涉及将
化学式为R.sup.1 CF.sub.2 CH.sub.2 OCF.sub.3-a-m (C.sub.2 H.sub.n X.sub.4-n F).sub.m R.sup.2.sub.a的
氟化醚与脱卤催化剂接触。还揭示了某些独特的饱和醚,其
化学式为R.sup.1 CF.sub.2 CH.sub.2 OCF.sub.3-a-m (C.sub.2 H.sub.n X.sub.4-n F).sub.m R.sup.2.sub.a,以及某些独特的不饱和醚,其
化学式为R.sup.1 CF.sub.2 CH.sub.2 OCF.sub.3-a-m (C.sub.2 H.sub.n X.sub.4-n F).sub.m-q (C.sub.2 H.sub.n-1 X.sub.3-n F).sub.q R.sup.2.sub.a。