heterocycles has been realized via C(sp3)‐centered radical C(sp2)−C(sp3) bond formation under oxidant‐free conditions at room temperature. This reaction readily incorporates various functional alkyl groups into heterocyclic compounds without observation of any alkyl radicalrearrangement and represents a mild and general tool for the preparation of valuable alkyl group‐functionalized heterocyclic compounds.
Copper catalyzed direct alkenylation of simple alkanes with styrenes
作者:Yefeng Zhu、Yunyang Wei
DOI:10.1039/c4sc00093e
日期:——
A novel Cu-catalyzed direct alkenylation of simple alkanes with styrenes was described. In the presence of a catalytic amount of Cu(OTf)2, a diverse range of alkenes undergo coupling with cycloalkanes to produce (E)-alkyl alkenes. This transformation is proposed to proceed via a radical process.
Cu-catalyzed CDC reactions of coumarins with cyclic ethers and cycloalkanes were achieved to afford a variety of C-3 functionalized coumarins bearing the C(sp2)–C(sp3) bond in moderate to excellent yields. The conversion was proposed to proceed via a radical process.
Cross-dehydrogenative coupling of coumarins with Csp<sup>3</sup>–H bonds using an iron–organic framework as a productive heterogeneous catalyst
作者:Son H. Doan、Vu H. H. Nguyen、Thuong H. Nguyen、Phuc H. Pham、Ngoc N. Nguyen、Anh N. Q. Phan、Thach N. Tu、Nam T. S. Phan
DOI:10.1039/c8ra00872h
日期:——
heterogeneous catalyst for the cross-dehydrogenative coupling of coumarins with Csp3–H bonds in alkylbenzenes, cyclohexanes, ethers, and formamides. The combination of DTBP as the oxidant and DABCO as the additive led to high yields of coumarin derivatives. The VNU-20 was more active towards this reaction than numerous other homogeneous and heterogeneous catalysts. Heterogeneous catalysis was confirmed