The Cyclopropylcarbinyl-Cyclobutyl-Homoallylic Rearrangement. Part III. Evidence for a symmetrical intermediate and for two discrete rearrangement processes
作者:Manfred Geisel、Cyril A. Grob、Ren� P. Traber、Werner Tschudi
DOI:10.1002/hlca.19760590819
日期:1976.12.15
aqueous dioxane the cyclopropylcarbinyl (1-X), endo-cyclobutyl (2-X) and homoallylic (3-X) derivatives (X = nucleofuge) react to give the same mixture of alcohols 1-OH and 3-OH by way of a common intermediate, the symmetrical homoallylic ion 22. This follows from a study of optically active reactants 1-X and 3-X and from the deuterium scrambling pattern in the products from deuteriated 1-X, endo-2-X
在缓冲的70%二恶烷水溶液中cyclopropylcarbinyl(1 -X),内切-环丁基(2 -X)和高烯丙基(3 -X)衍生物(X =核试剂)反应以得到醇的相同的混合物1 -OH和3 -OH通过共同的中间体,对称的均烯离子22。这遵循光学活性反应物的研究1 -X和3 -X和从产品氘加扰模式从氘代1 -X,内切- 2 -X和3 -X。高溶剂分解率3-X表示在过渡态π键的参与,而高率1 -X和内切- 2 -X反映强σ键参与这是在不存在外- 2 -X。