Designing Homogeneous Copper-Free Sonogashira Reaction through a Prism of Pd–Pd Transmetalation
作者:Bruno A. Martek、Martin Gazvoda、Damijana Urankar、Janez Košmrlj
DOI:10.1021/acs.orglett.0c01227
日期:2020.7.2
to promote oxidative addition to (hetero)aryl bromide and another to activate terminal alkyne substrate, leads to productive Pd–Pd transmetalation, subsequent reductive elimination, and formation of disubstituted alkyne. This conceptually novel rational design of copper-free Sonogashira reaction enabled facile identification of the reaction conditions, suitable for the synthesis of alkyl, aryl, and
Synthesis of diarylalkynes via tandem Sonogashira/decarboxylative reaction of aryl chlorides with propiolic acid
作者:Xiang Li、Fan Yang、Yangjie Wu
DOI:10.1039/c3ra47712f
日期:——
A facile and efficient protocol for one-pot synthesis of diarylalkynes via tandem Sonogashira/decarboxylative coupling has been developed. The remarkable features of this reaction include using commercially available aryl chlorides as starting materials and taking the propiolic acid instead of expensive terminal alkynes as an acetylene source.
2,2′-Diamino-6,6′-dimethylbiphenyl (L1) was found to be a good ligand in the CuI-catalyzed Sonogashira coupling reaction of various aryl iodides and bromides with terminal alkynes. Under suitable conditions, all reactions gave the desired coupling products in moderate to excellent yields.
Transition-Metal-Free Sonogashira-Type Coupling of <i>ortho</i>-Substituted Aryl and Alkynyl Grignard Reagents by Using 2,2,6,6-Tetramethylpiperidine-<i>N</i>-oxyl Radical as an Oxidant
作者:Modhu Sudan Maji、Sandip Murarka、Armido Studer
DOI:10.1021/ol1015702
日期:2010.9.3
Cross coupling of aryl, alkenyl, and alkynyl magnesium compounds by using 2,2,6,6-tetramethylpiperidine-N-oxyl radical (TEMPO) as an environmentally benign organic oxidant is described. This coupling reaction can be performed without adding any transition metal on various ortho-substituted aryl and alkynyl Grignardreagents. Importantly, functional groups such as esters, amides, and cyanides are shown
Palladacycle-Catalyzed Deacetonative Sonogashira Coupling of Aryl Propargyl Alcohols with Aryl Chlorides
作者:Hao Hu、Fan Yang、Yangjie Wu
DOI:10.1021/jo4014657
日期:2013.10.18
An efficient and general protocol for the deacetonative Sonogashira coupling of aryl propargyl alcohols with aryl chlorides is described. The reaction proceeded smoothly with the catalyst system of palladacycle/Xphos. This result represents the first successful deacetonative Sonogashira version for electron-poor, electron-neutral, and even inactive sterically hindered electron-rich aryl chlorides.