本文报道的是铜催化的S N 2'选择性烯丙基取代反应,该反应使用易于获得的烯丙基氯化物和1,1-二硼烷基烷烃,该反应随着1,1-二硼烷基烷烃的化学选择性C-B键活化而进行。在催化量的[Cu(IMes)Cl] [IMes = 1,3-双(2,4,6-三甲基苯基)咪唑-2-亚烷基]和LiO t Bu为碱的情况下,一系列伯仲烯丙基氯化物经过S N 2'-选择性烯丙基取代反应,生成支链烷基硼酸酯。还介绍了所得烷基硼酸酯的合成用途。
本文报道的是铜催化的S N 2'选择性烯丙基取代反应,该反应使用易于获得的烯丙基氯化物和1,1-二硼烷基烷烃,该反应随着1,1-二硼烷基烷烃的化学选择性C-B键活化而进行。在催化量的[Cu(IMes)Cl] [IMes = 1,3-双(2,4,6-三甲基苯基)咪唑-2-亚烷基]和LiO t Bu为碱的情况下,一系列伯仲烯丙基氯化物经过S N 2'-选择性烯丙基取代反应,生成支链烷基硼酸酯。还介绍了所得烷基硼酸酯的合成用途。
Metal-Free Enantioselective Oxidative Arylation of Alkenes: Hypervalent-Iodine-Promoted Oxidative C−C Bond Formation
作者:Mio Shimogaki、Morifumi Fujita、Takashi Sugimura
DOI:10.1002/anie.201609110
日期:2016.12.19
The enantioselective oxyarylation of (E)‐6‐aryl‐1‐silyloxylhex‐3‐ene was achieved using a lactate‐based chiral hypervalent iodine(III) reagent in the presence of boron trifluoride diethyl etherate. The silyl ether promotes the oxidative cyclization, and enhances the enantioselectivity. In addition, the corresponding aminoarylation was achieved.
Copper- and Phosphine-Ligand-Free Palladium-Catalyzed Direct Allylation of Electron-Deficient Polyfluoroarenes with Allylic Chlorides
作者:Yan-Bo Yu、Shilu Fan、Xingang Zhang
DOI:10.1002/chem.201202824
日期:2012.11.12
copper‐ and phosphine‐ligand‐free Pd‐catalyzed directallylation of electron‐deficient polyfluoroarenes with allylicchlorides and the reaction mechanism are described (see scheme). The simple catalytic system, broad substrate scope, and excellent functional‐group compatibility of this protocol provides a useful and facile access to allylated polyfluoroarenes.
Catalytic S<sub>N</sub>2′-Selective Substitution of Allylic Chlorides With Arylboronic Esters
作者:Aaron M. Whittaker、Richard P. Rucker、Gojko Lalic
DOI:10.1021/ol101171v
日期:2010.7.16
A copper-catalyzed SN2′-selective arylation of allylicchlorides has been achieved using arylboronic esters as nucleophiles. Arylation products were obtained in high yield with a variety of allylicchlorides and arylboronic esters in the presence of a wide range of functional groups. A mechanism is proposed on the basis of the results of stoichiometric experiments and the isolation of the proposed
使用芳基硼酸酯作为亲核试剂,已经实现了铜催化的烯丙基氯化物的S N 2'选择性芳基化。在各种官能团存在的情况下,可以使用多种烯丙基氯化物和芳基硼酸酯以高收率获得丙烯酸化产物。根据化学计量的实验结果和所提出的中间体的分离,提出了一种机理。