Three-Component One-Pot Synthesis of Unsymmetrical Diarylalkynes by Thermocontrolled Sequential Sonogashira Reactions Using Potassium Ethynyltrifluoroborate
作者:Taejung Kim、Kyu Hyuk Jeong、Youngseok Kim、Taesub Noh、Jaeyoung Choi、Jungyeob Ham
DOI:10.1002/ejoc.201700110
日期:2017.5.3
Sonogashira reactions with potassium ethynyltrifluoroborate and two different reactive aryl halides. The one-pot procedure was initiated by the palladium/copper-catalyzed Sonogashira coupling of potassium ethynyltrifluoroborate to an aryliodide or electron-deficient aryl bromide at 40 °C. Following a subsequent deboronative Sonogashira reaction of the in situ generated potassium (arylethynyl)trifluoroborate
Catalytic Efficiency of a New Tridentate Ferrocenyl Phosphine Auxiliary: Sonogashira Cross-Coupling Reactions of Alkynes with Aryl Bromides and Chlorides at Low Catalyst Loadings of 10<sup>-</sup><sup>1</sup> to 10<sup>-</sup><sup>4</sup> Mol %
作者:Jean-Cyrille Hierso、Aziz Fihri、Régine Amardeil、Philippe Meunier、Henri Doucet、Maurice Santelli、Vladimir V. Ivanov
DOI:10.1021/ol048870z
日期:2004.9.1
see text] The catalytic activity in Sonogashira cross-coupling reactions of alkynes with a variety of aryl halides (including chlorides) using a multidentate ferrocenyl phosphine is presented. The novel mixed ferrocenyl aryl/alkyl triphosphine is thermally stable and insensitive to air or moisture, and its robustness allows arylalkynylation at 10(-1) to 10(-4) mol % catalyst loadings with TONs up to
Porous organic polymer with <i>in situ</i> generated palladium nanoparticles as a phase-transfer catalyst for Sonogashira cross-coupling reaction in water
Pd(PPh3)4 catalysed in situ one-pot Suzuki cross-coupling reaction between imidazolium attached dibromobenzene and 1,3,5-tri(4-pinacholatoborolanephenyl)benzene. Besides the high thermal and chemical stability, the obtained Pd@PTC-POP can be used as a highly active and reusable phase-transfer solid catalyst to promote the Sonogashira coupling reaction in water. The obtained results indicate that the Pd@PTC-POP
The copper-catalyzeddecarboxylative reactions of alkynyl carboxylic acids with aryl halides were performed under relatively mild reaction conditions. Benzofurans could be further prepared smoothly by a one-pot domino protocol on the basis of decarboxylativecross-coupling of 2-iodophenol.
Pd-Catalyzed decarboxylative alkynylation of alkynyl carboxylic acids with arylsulfonyl hydrazides<i>via</i>a desulfinative process
作者:Sheng Chang、Ying Liu、Shu Zhu Yin、Lin Lin Dong、Jian Feng Wang
DOI:10.1039/c8nj02964d
日期:——
In the presence of a Pd(II)/P-ligand catalytic system, decarboxylative alkynylation of alkynyl carboxylicacids and arylsulfonyl hydrazides by desulfinative coupling could provide aryl alkynes in satisfactory yields by either judiciously selecting palladium catalysts or modulating phosphine ligands under mild conditions. The reported coupling reactions are very practical as they do not require the