Mild Rhodium(III)-Catalyzed Direct CH Allylation of Arenes with Allyl Carbonates
作者:Honggen Wang、Nils Schröder、Frank Glorius
DOI:10.1002/anie.201301165
日期:2013.5.10
All(yl) possible! A rhodium(III)‐catalyzed intermolecular directCHallylation reaction utilizing readily accessible allylcarbonates was developed. This method allows the allylation of electron‐neutral arenes, providing complete γ‐selectivity, high isomeric ratio, good substrate scope, and excellent functional group compatibility.
Versatile ruthenium(ii)-catalyzed C–H cyanations of benzamides
作者:Weiping Liu、Lutz Ackermann
DOI:10.1039/c3cc49502g
日期:——
Direct cyanations of arenes and heteroarenes bearing only weakly coordinating amides were accomplished using a robust ruthenium(II) catalyst. The user-friendly C(sp2)âH activation occurred with the assistance of carboxylate with high site-selectivity, excellent functional group tolerance and ample scope.
Versatile directed aromatic C–H bond activation and oxidative coupling with allylicalcohols is reported using a cationic Rh(III) catalyst. This method provides efficient and robust synthesis of functional β-aryl ketones and indolines in good yields with excellent regioselectivity, even the reaction runs at 3 g scale. The catalytic systems have good functional group tolerance, such as CONR2, NHAc,
Atom and step economical synthesis of acyclic quaternary centers <i>via</i> iridium-catalyzed hydroarylative cross-coupling of 1,1-disubstituted alkenes
作者:Phillippa Cooper、Andrew G. Dalling、Elliot H. E. Farrar、Timothy P. Aldhous、Simon Grélaud、Eleanor Lester、Lyman J. Feron、Paul D. Kemmitt、Matthew N. Grayson、John F. Bower
DOI:10.1039/d2sc02790a
日期:——
accessed with high atom and step economy by Ir-catalyzed alkenehydroarylation. These studies provide unique examples of the use of non-polarized 1,1-disubstitutedalkenes in branch selective Murai-type hydro(hetero)arylations. Detailed mechanistic studies have been undertaken, and these indicate that the first irreversible step is the demanding alkene carbometallation process. Structure-reactivity studies
通过 Ir 催化的烯烃加氢芳基化,可获得具有高原子和步骤经济性的季苄基中心。这些研究提供了在分支选择性 Murai 型氢(杂)芳基化中使用非极化 1,1-二取代烯烃的独特示例。已经进行了详细的机理研究,这些研究表明第一个不可逆的步骤是要求苛刻的烯烃碳金属化过程。结构-反应性研究表明,其效率严重依赖于配体的关键结构特征。已经进行了计算研究以使该实验数据合理化,表明空间要求更高的配体如何通过以下方式降低反应势垒反应中间体的预变形。此处披露的关键见解将支持日益复杂的分支选择性 Murai 氢芳基化的持续发展。
The birch reduction of heterocyclic compounds.<b>11</b>. Birch reduction and reductive alkylation of furamides
The Birchreduction-alkylation of some N,N-dialkylfuramides and its application to the useful intermediates for the natural product synthesis are described.