The bis-1,4-dimesityl-1,2,3-triazol-5-ylidene–palladium complex (1a) successfully catalyzes the Mizoroki–Heck and Sonogashira coupling reactions with aryl bromides to give the corresponding alkenes and alkynes, respectively, in good to excellent yields. In the Mizoroki–Heck reaction, electron-rich, electron-poor, and functionalized aryl bromides and alkenes are tolerated, while the substrates are limited
Pd together with CuI has been well known as the catalyst towards Sonogashirareaction, which provides an effective route to functional alkynes. However, the achievement of high activity and selectivity of this catalytic system is still challenging in some cases. Illustrative examples include their low activity for aryl chloride substrates, and switched selectivity to oxidative coupling products in
Pd 与 CuI 一起作为 Sonogashira 反应的催化剂是众所周知的,这为功能性炔烃提供了有效的途径。然而,在某些情况下,实现该催化体系的高活性和选择性仍然具有挑战性。说明性的例子包括它们对芳基氯底物的低活性,以及在空气气氛中对氧化偶联产物的选择性转换。在这项工作中,掺入了 Cu 的 Au 13纳米团簇 [Au 13 Cu 2 (PPh 3 ) 6 (SC 2 H 4 Ph) 6 ] + [NO 3 ] - (Au 13 Cu 2) 是通过快速合成以高产率设计和制备的。这种原子级精确的纳米团簇显示出成为 Sonogashira 反应的新型催化系统的潜力,具有高活性和选择性,以及即使在空气中也具有良好的可回收性。
Trinuclear copper(I) complexes with triscarbene ligands: catalysis of C–N and C–C coupling reactions
preparation of trinuclear copper(I) complexes with triscarbene ligands are presented, which yield higher purity products than the one previously described. The first crystal structure of one of these complexes is reported and confirms the expected structure. The trinuclear complexes proved to be efficient catalysts of Ullmann-type reactions as well as of the Sonogashira reaction.
Palladium(II) complex for catalyzing sonogashira coupling reactions and a method thereof
申请人:KING FAHD UNIVERSITY OF PETROLEUM AND MINERALS
公开号:US09546191B1
公开(公告)日:2017-01-17
A palladium(II) complex which catalyzes the Sonogashira coupling reaction efficiently under aerobic condition and a method of employing the palladium(II) complex to synthesize internal alkynes. The palladium(II) complex is an effective catalyst for the coupling reactions of aryl iodo and diiodo compounds with unactivated alkyl alkynes and terminal dialkynes to produce various novel symmetrical dialkynes and disubstituted internal alkynes in excellent yields.
Ligand-, Copper-, and Amine-Free Sonogashira Reaction of Aryl Iodides and Bromides with Terminal Alkynes
作者:Sameer Urgaonkar、John G. Verkade
DOI:10.1021/jo049325e
日期:2004.8.1
and amine-free palladium-catalyzed Sonogashirareaction of aryl iodides and bromides with terminal alkynes have been developed. Critical to the success of this new protocol is the use of tetrabutylammonium acetate as the base. Noteworthy features of this method are room-temperature conditions and the tolerance of a broad range of functional groups in both reaction partners.