Diels–Alder reactions of polyfluorocyclohexa-1,3-dienes. Part IV. Addition of alkynes to 1H,2H-hexafluorocyclohexa-1,3-diene
作者:W. J. Feast、W. K. R. Musgrave、R. G. Weston
DOI:10.1039/j39710001547
日期:——
1H,2H-Hexafluorocyclohexa-1,3-diene (1) dimerizes slowly at room temperature; with perfluorobut-2-yne and 3,3,3-trifluoropropyne at 200° the diene (1) gives 2,3-bis(trifluoromethyl)-1,6,7,7,8,8-hexafluorobicyclo[2,2,2]-octa-2,5-diene (5) and 2-trifluoromethyl-4,5,7,7,8,8-hexafluorobicyclo[2,2,2]octa-2,5-diene (4) respectively, together with dimer. Pyrolysis of (4) gives 3,4-difluorobenzotrifluoride
1 H,2 H-六氟环己-1,3-二烯(1)在室温下缓慢二聚;在200°下用全氟丁-2-炔和3,3,3-三氟丙炔将二烯(1)生成2,3-双(三氟甲基)-1,6,7,7,8,8-六氟双环[2,2, 2]-辛基-2,5-二烯(5)和2-三氟甲基-4,5,7,7,8,8-六氟双环[2,2,2]辛基-2,5-二烯(4),与二聚体一起。(4)的热解产生了3,4-二氟苯并三氟化物,它也由3-氨基-4-氟苯并三氟化物通过四氟硼酸重氮鎓的热解而制得。