Palladium catalyzed synthesis of aryl, heterocyclic and vinylic acetylene derivatives
作者:H.A. Dieck、F.R. Heck
DOI:10.1016/s0022-328x(00)94049-x
日期:1975.7
Monosubstituted acetylenes are converted into disubstituted acetylenes by reaction with aryl, heterocyclic or vinylic bromides or iodides at 100°C in the presence of a basic amine and diacetatobis(triphenylphosphine)palladium(II) catalyst.
Palladium-Catalyzed Copper-Free Sonogashira Coupling Reaction in Water and Acetone
作者:Yuhong Zhang、Shengyin Shi
DOI:10.1055/s-2007-984533
日期:2007.7
An efficient palladium-catalyzedcopper-free Sono-gashira reaction in water and acetone has been developed under mild conditions. The results showed that the aryl iodides could carry out the cross-coupling reaction with a variety of terminal alkynes in high yields in water-acetone in the absence of amine, copper(I) salts, or phosphine ligands at 60 °C for one hour, and good yields were obtained for
A Sustainable, User-Friendly Protocol for the Pd-Free Sonogashira Coupling Reaction
作者:Aggeliki A. Liori、Ioannis K. Stamatopoulos、Argyro T. Papastavrou、Afroditi Pinaka、Georgios C. Vougioukalakis
DOI:10.1002/ejoc.201800827
日期:2018.12.2
An efficient, user‐friendly protocol for the Pd‐free, Cu‐catalyzedSonogashiracross‐couplingreaction was developed. The (pre)catalytic species utilized are low‐cost, stable, and widely available: CuSO4·5H2O as the copper source, an NHC salt precursor, and K2CO3 as the base.
针对无钯,铜催化的Sonogashira交叉偶联反应,开发了一种高效,用户友好的方案。所使用的(预)催化物质成本低廉,稳定且可广泛获得:CuSO 4 · 5H 2 O作为铜源,NHC盐前体和K 2 CO 3作为碱。
Palladium-Catalyzed Coupling Reaction of Terminal Alkynes with Aryl Iodides in the Presence of Indium Tribromide and Its Application to a One-Pot Synthesis of 2-Phenylindole
作者:Norio Sakai、Kimiyoshi Annaka、Takeo Konakahara
DOI:10.1021/ol036499u
日期:2004.5.1
The use of a novel PdCl(2)(PPh(3))(2)-InBr(3) reagent system to catalyze cross-coupling reactions of a variety of aryliodides with several terminal alkynes is described. The corresponding functional alkyne derivatives were produced in good to excellent yields. Moreover, a catalytic amount of InBr(3) effectively catalyzes the intramolecular cycloaddition of 2-phenylethynylaniline to form an indole
comprehensive mechanistic studies indicate that a free carbyne radical intermediate is formed via the photocatalyticsingleelectrontransfer process, and KH2PO4 plays a crucial role in significant improvements on yield and selectivity based on density-functional theory calculations, providing a new direction for radical coupling reactions of diazo compounds.
我们报告了使用 α-重氮三氟甲磺酸锍和水聚合合成 1,4-二羰基Z-烯烃形成炔烃的一般方案。C=O、C=C 和 C-H 键是在温和条件下形成的,具有广泛的官能团耐受性。该反应表现出优异的Z选择性和完全的区域选择性。得到的 1,4-二羰基Z-烯烃可以顺利进行后续转化为各种杂芳族支架。此外,该反应还通过直接使用 D 2提供了一种容易获得相应的氘代Z烯烃和氘代杂芳烃的方法,这些氘代具有高水平的氘掺入(90-97% D-inc.)。O,从而使该方法具有很高的价值。综合机理研究表明,通过光催化单电子转移过程形成了游离的碳炔自由基中间体,基于密度泛函理论计算, KH 2 PO 4在显着提高产率和选择性方面发挥了关键作用,为光催化单电子转移过程提供了新的方向。重氮化合物的自由基偶联反应。