申请人:Occidental Chemical Corporation
公开号:US04792618A1
公开(公告)日:1988-12-20
Fluoro-substituted carbocyclic compounds are prepared by (A) reacting hydrogen fluoride with a chloro-cyclohexenyl compound of the formula ##STR1## where R.sub.1 and R.sub.2 are independently selected from the group consisting of --H, --CH.sub.2 OH, --COF, --COCl, --CF.sub.3, --CN, ##STR2## and --CH.sub.2 R, where R is --H or alkyl of 1-4 carbon atoms, to form a gem-dihalocyclohexane compound of the formula ##STR3## where X is chlorine and R.sub.1 and R.sub.2 are as defined above, (B) dehydrohalogenating the gem-dihalocyclohexane compound in the vapor phase to form a fluoro-cyclohexenyl compound of the formula ##STR4## (C) contacting the fluoro-cyclohexenyl compound, in the vapor phase, with a dehydrogenation catalyst to form a fluoro-substituted aromatic compound of the formula ##STR5##
通过以下步骤制备氟代取代的环烷化合物:(A) 将氢氟酸与具有以下结构的氯代环己烯基化合物反应:其中R.sub.1和R.sub.2分别选择自--H,--CH.sub.2 OH,--COF,--COCl,--CF.sub.3,--CN,##STR2##和--CH.sub.2 R的组中,其中R为--H或1-4碳原子的烷基,形成具有以下结构的双卤代环己烷化合物:其中X为氯,R.sub.1和R.sub.2如上定义,(B) 在气相中脱卤代双卤代环己烷化合物以形成具有以下结构的氟代环己烯基化合物:(C) 在气相中将氟代环己烯基化合物与脱氢催化剂接触,形成具有以下结构的氟代取代芳香化合物: