Multiple aromatische sigmatropische Umlagerung von ?, ?-Dimethylallyl-phenyl�ther
作者:F. Scheinmann、R. Barner、H. Schmid
DOI:10.1002/hlca.19680510715
日期:1968.10.31
The rearrangement of γ,γ-dimethylallyl phenyl ether (1), contrary to previous reports, gives a mixture of 4-(γ,γ-dimethylallyl)-phenol (2), 2-(α,β-dimethylallyl)-phenol (3) and 2,2,3-trimethylcoumaran (4). The ratio of the reaction products is dependent on the solvent and the reaction temperature. The mechanism for the reaction is discussed in terms of multiple sigmatropic rearrangements.
与以前的报道相反,γ,γ-二甲基烯丙基苯醚(1)的重排给出了4-(γ,γ-二甲基烯丙基)-苯酚(2),2-(α,β-二甲基烯丙基)-苯酚(2)的混合物3)和2,2,3-三甲基香豆素(4)。反应产物的比例取决于溶剂和反应温度。根据多重σ重排讨论了该反应的机理。