申请人:Bayer Aktiengesellschaft
公开号:US05315047A1
公开(公告)日:1994-05-24
1,1,1,4,4,4-Hexafluorobutane is prepared by first reacting 1,1,3,4,4-pentachlorobuta-1,3-diene with hydrogen fluoride in the presence of catalysts at 60.degree. to 180.degree. C. to give 1,1,1,4,4,4-hexafluoro-2-chlorobutane, and converting this to 1,1,1,4,4,4-hexafluorobutane. On working up the product of the first stage of the process, it is possible to isolate novel compounds of formula (I): CF.sub.2 X--CH.sub.2 --R (I) in which X is fluorine or chlorine and R is --CHCl--CF.sub.2 Cl, --CHCl--CFCl.sub.2 or --CCl.dbd.CCl.sub.2.
1,1,1,4,4,4-六氟丁烷的制备方法是首先将1,1,3,4,4-五氯丁-1,3-二烯与氢氟酸在催化剂的存在下在60℃至180℃反应,得到1,1,1,4,4,4-六氟-2-氯丁烷,然后将其转化为1,1,1,4,4,4-六氟丁烷。在处理该过程的第一阶段产物时,可以分离出式(I)的新化合物:CF.sub.2 X--CH.sub.2 --R(I),其中X为氟或氯,R为--CHCl--CF.sub.2 Cl,--CHCl--CFCl.sub.2或--CCl.dbd.CCl.sub.2。