Sterically enhanced 2‐iminopyridylpalladium chlorides as recyclable ppm‐palladium catalyst for Suzuki–Miyaura coupling in aqueous solution
作者:Wenhua Lin、Liping Zhang、Yanping Ma、Tongling Liang、Wen‐Hua Sun
DOI:10.1002/aoc.6474
日期:2022.1
2-iminopyridine derivatives and their palladium chlorides complexes are designed and prepared, which efficiently promote the Suzuki–Miyauracoupling (SMC) reaction in aqueous solution. Besides the good to excellent yields and broad substrate scope, these catalysts can be reused for at least four new batches of the substrates. Spontaneous separation of coupling products in the aqueous reaction medium is
Copper-catalyzedcyanation of arylhalides was improved to be more economical and environmentally friendly by using water as the solvent and ligand-free Cu(OAc)2·H2O as the catalyst under microwave heating. The suggested methodology was applicable to a wide range of substrates including aryl iodides and activated aryl bromides.
Computed CH Acidity of Biaryl Compounds and Their Deprotonative Metalation by Using a Mixed Lithium/Zinc-TMP Base
作者:Raghu Ram Kadiyala、David Tilly、Elisabeth Nagaradja、Thierry Roisnel、Vadim E. Matulis、Oleg A. Ivashkevich、Yury S. Halauko、Floris Chevallier、Philippe C. Gros、Florence Mongin
DOI:10.1002/chem.201300552
日期:2013.6.10
of synthesizing biaryl compounds, several aromatic iodides were prepared by the deprotonative metalation of methoxybenzenes, 3‐substituted naphthalenes, isoquinoline, and methoxypyridines by using a mixed lithium/zinc‐TMP (TMP=2,2,6,6‐tetramethylpiperidino) base and subsequent iodolysis. The halides thus obtained, as well as commercial compounds, were cross‐coupled under palladium catalysis (e.g., Suzuki
An efficient one-pot palladium-catalyzed hydroformylation of aryl halides to produce aromatic aldehydes has been achieved, employing tert-butyl isocyanide as a C1 resource and formate salt as a hydride donor without any additional bases. Characterized by its mild reaction conditions, easy operation and lower toxicity, this reaction can tolerate a wide array of functional groups with moderate to excellent
Cobalt-Catalyzed Preparation of Arylindium Reagents from Aryl and Heteroaryl Bromides
作者:Laksmikanta Adak、Naohiko Yoshikai
DOI:10.1021/jo201174r
日期:2011.9.16
A cobalt–bathophenanthroline catalyst has been developed for the directpreparation of a variety of arylindium reagents from the corresponding aryl and heteroaryl bromides in the presence of indium metal and lithium chloride. The thus-formed arylindium reagents undergo efficient palladium-catalyzed cross-coupling reactions with aryl iodides, tolerating various functional groups including hydroxy and