3-<i>tert</i>
-Butyl-Substituted Cyclohexa-1,4-dienes as Isobutane Equivalents in the B(C<sub>6</sub>
F<sub>5</sub>
)<sub>3</sub>
-Catalyzed Transfer Hydro-<i>tert</i>
-Butylation of Alkenes
作者:Sebastian Keess、Martin Oestreich
DOI:10.1002/chem.201604397
日期:2017.5.2
equivalents when activated by the strong boron Lewis acid tris(pentafluorophenyl)borane. The hitherto unprecedented transfer hydro‐tert‐butylation from one unsaturated hydrocarbon to another is achieved with 1,1‐diarylalkenes as substrates, thereby presenting itself as a new way of incorporating tertiary alkyl groups into carbon frameworks. Transient carbocation intermediates give rise to competing reaction pathways
当在强硼路易斯酸三(五氟苯基)硼烷活化时,在C3处带有叔丁基的环六-1,4-二烯被显示为异丁烷当量。以1,1-二芳基烯烃为底物,实现了前所未有的从一种不饱和烃到另一种不饱和烃的加氢叔丁基转移,从而成为将叔烷基引入碳骨架的一种新方法。瞬态碳正离子中间体产生无法完全被抑制的竞争性反应途径。