Fluoro-olefin chemistry. Part IX. Thermal insertion of hexafluoropropene into carbon–hydrogen bonds in alkylbenzenes
作者:Robert N. Haszeldine、Allan J. Mitchinson、Ronald Rowland、Anthony E. Tipping
DOI:10.1039/p19760000517
日期:——
other products. Reaction at high pressure (autoclaves) favours 1 : 1 adduct formation whereas at lower pressure (tubes) indane formation is favoured. The reaction with cumene does not afford 1 : 1 adducts, the major products being 1,2,2,2-tetrafluoroethylbenzene, 1,1-difluoro-2-methylpropene, and the cyclobutane, [graphic omitted]F2; indanes are also formed in this reaction. Chlorination, bromination
热反应(约烷基苯的250℃)ARCH 2 R(氩=苯基,R = H,Me中,或Et; Ar为p -ClC 6 ħ 4,R = H; Ar为p -MeC 6 ħ由图4可见,R = H)与六氟丙烯主要给出1:1的加合物ArCHR·CF 2 ·CHF·CF 3,以及少量的1:1的加合物ArCHR·CF(CF 3)·CHF 2。,1-烷基-2,2,3-三氟-3-三氟甲基茚满,1-烷基-2,3,3-三氟-2-三氟甲基茚满和少量其他产物。在高压(高压釜)下的反应有利于1:1的加合物形成,而在低压(管)下的反应有利于茚满的形成。与枯烯的反应没有得到1:1的加合物,主要产物是1,2,2,2-四氟乙基苯,1,1-二氟-2-甲基丙烯和环丁烷,[F 2省略] 。在该反应中也形成茚满。1:1加合物PhCH 2 ·CF 2 ·CHF·CF 3的氯化,溴化和硝化得到相应的邻位和对位取代的衍生物的比例分别为47:53、20:80和0:100。