Pentafluorophenyl prop-2-ynyl ether (1) undergoes isomerisation to 2-fluoromethyl-4,5,6,7-tetrafluorobenzo[b]-furan (3) on distillation in vacuo over silica at 370 °C. The ether (1) undergoes reaction with benzene and p-xylene at 140 °C to give the 2-arylmethyl-4,5,6,7-tetrafluorobenzo[b]furan derivatives (4) and (8) respectively, while 1,3,4,5,6,7,8-heptafluoro-2-naphthyl prop-2-ynyl ether (2) reacts
                                    五氟苯基丙-2-炔醚(1)在370℃的
二氧化硅上真空蒸馏,然后异构化为2-
氟甲基-4,5,6,7-
四氟苯并[ b ]-
呋喃(3)。醚(1)在140°C下与苯和
对二甲苯反应,分别得到2-芳基甲基-4,5,6,7-
四氟苯并[ b ]
呋喃衍
生物(4)和(8),而1, 3,4,5,6,7,8-七
氟-2-
萘丙-2-炔基醚(2)在140°C下与相同的溶剂反应生成相应的2-芳基甲基4,5,6,7 ,8,9-六
氟萘并[2,1- b ]
呋喃衍
生物(9)和(10)。