Nickel-catalyzed reductive allylation of aryl bromides with allylic acetates
作者:Xiaozhan Cui、Shulin Wang、Yuwei Zhang、Wei Deng、Qun Qian、Hegui Gong
DOI:10.1039/c3ob40232k
日期:——
This paper highlights Ni-catalyzed allylation of electron-rich aryl bromides with a variety of substituted allyliccarbonates using zinc as the terminal reductant, affording E-alkenes regioselectively in good to excellent yields by the addition of aryl to the less hindered allylic carbon. The electron-deficient aryl bromides and chlorides are also highly efficient coupling partners.
作者:Beiqi Yang、Xinyu Liu、Aiwen Yu、Qi Yang、Yuanhua Wang
DOI:10.1021/acscatal.2c04086
日期:2022.11.4
ulfonamides) catalyzed by rhodium(II) is reported herein. The isomers of the terminal and internal alkenes, even mixtures, all provided the same allylic 1,3-diamine products under mild reaction conditions. The resulting diaminated products can be derived to functionalized diamines and can further generate allylic triamines. Mechanistic studies revealed that the rhodium(II) compounds catalyzed a variety
易得烯烃与N的分子间 1,3-二胺化反应本文报道了由铑(II)催化的-氟双(苯磺酰胺)。末端和内部烯烃的异构体,甚至混合物,都在温和的反应条件下提供相同的烯丙基 1,3-二胺产物。所得二胺化产物可衍生为官能化二胺,并可进一步生成烯丙基三胺。机理研究表明,铑(II)化合物在反应过程中基于其单电子氧化还原催化循环催化了多种化学转化,特别是末端烯烃中的自由基极性交叉和烯丙基C-H键的直接活化,然后是自由基交叉。 -偶联内部烯烃。这些结果显示了铑 (II) 在 C-H 胺化反应中的潜力以及众所周知的铑类氮氧化物的转化。
Hydrogen‐Atom‐Transfer‐Initiated Radical/Polar Crossover Annulation Cascade for Expedient Access to Complex Tetralins
作者:Lucas Johnson、Griffin Barnes、Sebastian Fernandez、Christopher D. Vanderwal
DOI:10.1002/anie.202303228
日期:——
A radical/polarcrossover manifold permits annulations between allylarenes and Giese-type accepters, providing a route to functionalized tetralins. The reaction conditions are mild and therefore exhibit significant functional group tolerance. The annulation products are formally cycloadducts of styrenes and electron-deficient alkenes, and they can be used to form a variety of strained ring products