Direct olefination of benzaldehydes into 1,3-diarylpropenes <i>via</i> a copper-catalyzed heterodomino Knoevenagel-decarboxylation-Csp<sup>3</sup>-H activation sequence
作者:Yaping Zhao、Lu Sun、Tieqiang Zeng、Jiayi Wang、Yanqing Peng、Gonghua Song
DOI:10.1039/c4ob00155a
日期:——
Copper-catalyzed direct olefination of benzaldehydes into 1,3-diarylpropenes by a novel domino Knoevenagel-decarboxylation-Csp3-H activation sequence is reported. This method provides a concise and effective route toward the synthesis of unsymmetrical 1,3-diarylpropene derivatives.
Copper-catalyzed oxidative alkenylation of C(sp<sup>3</sup>)–H bonds via benzyl or alkyl radical addition to β-nitrostyrenes
作者:Shengrong Guo、Yanqin Yuan、Jiannan Xiang
DOI:10.1039/c4nj02416h
日期:——
A new method for the preparation of (E)-β-alkylstyrene derivatives has been developed via the addition of a benzyl or alkyl radical to β-nitrostyrenes using di-tert-butyl peroxide (DTBP) as the oxidant in the presence of Cu powder catalyst. The C–H bonds in various toluene derivatives, ethers, alkanes and alcohols were successfully converted into C–C bonds to yield the corresponding (E)-β-alkylstyrene