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
The oxidative difunctionalization of aryl alkynoates with alphatic aldehydes as a cheap and abundant alkyl radical source was developed, providing a variety of trisubstituted alkenes in moderate to good yields. In this reaction, radical decarbonylative alkylation of C-C triple bond, 1,4-aryl migration, and decarboxylation were involved under metal-free conditions.