Pyrolysis reactions of 4-phenyl-2,3,5,6-tetrafluorophenyl prop-2-enyl ether and 4-trifluoromethyl-2,3,5,6-tetrafluorophenyl prop-2-enyl ether: remarkable rearrangement reactions of intramolecular Diels–Alder products.
作者:David M Allen、Andrei S Batsanov、Gerald M Brooke、Stephen J Lockett
DOI:10.1016/s0022-1139(00)00405-x
日期:2001.3
3.1.02,7]non-3-ene-6-one (28), and 3-trifluoromethyl-2,4,5,7-tetrafluorotricyclo[3.3.1.02,7]non-3-ene-6-one (31), respectively, the products of one of the two possible intramolecular Diels–Alder reactions of the Claisen rearrangement intermediates 2. FVP of 26 at 430°C and 27 at 450°C give the bicyclic compounds 7-phenyl-2,5β,6,7aβ-tetrafluoro-3aβ,4,5,7a-tetrahydroinden-1-one (34) and 7-trifluoromethyl-2
4-苯-2,3,5,6-四氟苯基丙-2-烯基醚(26)在闪蒸气相(FVP)条件下于350°C的热解和4-三氟甲基-2,3,5,6的热解-四氟苯基丙-2-烯基醚(27),在真空下于169°C加热,得到包括3-苯基-2,4,5,7-四氟三环[3.3.1.0 2,7 ] non-3-的产物混合物ene-6-one(28)和3-三氟甲基-2,4,5,7-四氟三环[3.3.1.0 2,7 ] non-3-ene-6-one(31)的产物克莱森重排中间体2的两种可能的分子内Diels-Alder反应中的2。FVP在430°C和27时为26在450°C下得到双环化合物7-苯基-2,5β,6,7aβ-四氟-3aβ,4,5,7a-四氢茚-1-酮(34)和7-三氟甲基-2,5β,6,7aβ -四氟-3aβ,4,5,7a-四氢茚-1-酮(37)。提出这后两种化合物是通过被束缚的2,4,5-三氟-3-(取代基)-2