Using a double Suzuki cross-coupling reaction ortho- or para-bromobenzyl bromides are easily transformed into unsymmetrical diaryl (or heteroaryl) methanes (C) 2003 Elsevier Ltd. All rights reserved.
Copper(I)-Catalyzed Carboxylation of Aryl- and Alkenylboronic Esters
摘要:
The copper(I)-catalyzed carboxylation reaction of aryl- and alkenylboronic esters proceeded smoothly under CO(2) to give the corresponding carboxylic acid in good yield. This reaction showed wide generality with higher functional group tolerance compared to the corresponding Rh(I)-catalyzed reaction.
Palladium(0)-Catalyzed, Copper(I)-Mediated Coupling of Cyclic Thioamides with Alkenylboronic Acids, Organostannanes, and Siloxanes
作者:Nuzhat Arshad、Jamshed Hashim、C. Oliver Kappe
DOI:10.1021/jo900848s
日期:2009.7.17
The Pd-catalyzed cross-coupling of cyclic thioamides and thioureas with alkenylboronic acids, vinyl- and (het)arylstannanes, and arylsiloxanes in the presence of stoichiometric amounts of a Cu(I) cofactor is described. The desulfitative C−C cross-coupling protocol of the Liebeskind−Srogl type is performed under neutral conditions and can be applied to a range of heterocyclic structures with embedded
Directed Markovnikov hydroarylation and hydroalkenylation of alkenes under nickel catalysis
作者:Zi-Qi Li、Omar Apolinar、Ruohan Deng、Keary M. Engle
DOI:10.1039/d1sc03121j
日期:——
Native Lewis basic functional groups enable the nickel-catalyzed Markovnikov-selective hydroarylation and hydroalkenylation of unactivated alkenes with organoboron reagents.
Copper-Mediated Difunctionalization of Alkenylboronic Acids: Synthesis of ɑ-Imino Ketones
作者:Ji-Wen Jiao、Hong-Yan Bi、Pei-Sen Zou、Zhi-Xin Wang、Cui Liang、Dong-Liang Mo
DOI:10.1002/adsc.201800718
日期:2018.9.3
Various ɑ‐imino ketones were prepared in good yields through a copper‐mediated difunctionalization of alkenylboronic acids with benzotriazolamine in air. Mechanistic studies showed that ɑ‐imino ketonesformation occurred through an initial copper‐mediated coupling reaction to form an enamine, followed by homolysis of the C−Cu bond to produce an ɑ‐radical imine, and finally radical oxidation by air. The
products can be obtained in moderate to good yields, which offers practical access to five- and six-membered lactams. This protocol has predictable regio- and chemoselectivity, excellent functional group compatibility and ease of operation in air, representing a significant step-forward towards manganese-catalyzed C-C coupling.
Regioselective Radical Amino-Functionalizations of Allyl Alcohols via Dual Catalytic Cross-Coupling
作者:Zuxiao Zhang、Duong T. Ngo、David A. Nagib
DOI:10.1021/acscatal.1c00404
日期:2021.3.19
range of nucleophiles with allylalcohols has been enabled by a dual catalytic strategy. This approach entails the combined action of an Ir photocatalyst that enables mild access to N-radicals via an energy transfer mechanism, as well as a Cu complex that intercepts the ensuing alkyl radical upon cyclization. Merger of this Cu-catalyzed cross-coupling enables a broad range of nucleophiles (e.g., CN
通过双重催化策略实现了一系列亲核试剂与烯丙醇的区域选择性胺化和交叉偶联。这种方法需要 Ir 光催化剂的联合作用,通过能量转移机制可以温和地接近 N-自由基,以及在环化时拦截随后的烷基自由基的 Cu 配合物。这种Cu 催化的交叉偶联的合并使广泛的亲核试剂(例如CN、SCN、N 3、乙烯基、烯丙基)能够参与烯烃的自由基氨基官能化。值得注意的是,立体、区域和动力学探针提供了对这种基于 Cu 的自由基拦截性质的见解。