An efficient palladium–benzimidazolyl phosphine complex for the Suzuki–Miyaura coupling of aryl mesylates: facile ligand synthesis and metal complex characterization
作者:Kin Ho Chung、Chau Ming So、Shun Man Wong、Chi Him Luk、Zhongyuan Zhou、Chak Po Lau、Fuk Yee Kwong
DOI:10.1039/c2cc15972d
日期:——
A new class of easily accessible hemilabile benzimidazolyl phosphine ligands has been developed. The ligand skeleton is prepared from commercially available and inexpensive o-phenylenediamine and 2-bromobenzoic acid. With catalyst loading down to 0.5 mol% palladium, excellent catalytic activity towards the Suzuki-Miyaura coupling of aryl mesylates is still observed. This represents the lowest catalyst
Highly Reactive, Single-Component Nickel Catalyst Precursor for Suzuki-Miyuara Cross-Coupling of Heteroaryl Boronic Acids with Heteroaryl Halides
作者:Shaozhong Ge、John F. Hartwig
DOI:10.1002/anie.201207428
日期:2012.12.14
One for all: The coupling of a range of nitrogen‐ and sulfur‐containing heteroaryl halides with five‐membered nitrogen‐, oxygen‐, and sulfur‐containing heteroaryl boronic acids were achieved in high yields with only 0.5 mol % of the single‐component nickel precatalyst [(dppf)NiCl(cinnamyl)] (dppf=1,1′‐bis(diphenylphosphanyl)ferrocene). The reaction demonstrates good functional group compatibility,
Ni(COD)(DQ): An Air‐Stable 18‐Electron Nickel(0)–Olefin Precatalyst
作者:Van T. Tran、Zi‐Qi Li、Omar Apolinar、Joseph Derosa、Matthew V. Joannou、Steven R. Wisniewski、Martin D. Eastgate、Keary M. Engle
DOI:10.1002/anie.202000124
日期:2020.5.4
We report that Ni(COD)(DQ) (COD=1,5-cyclooctadiene, DQ=duroquinone), an air-stable 18-electron complex originally described by Schrauzer in 1962, is a competent precatalyst for a variety of nickel-catalyzed synthetic methods from the literature. Due to its apparent stability, use of Ni(COD)(DQ) as a precatalyst allows reactions to be conveniently performed without use of an inert-atmosphere glovebox
Bis(dialkylphosphino)ferrocene-Ligated Nickel(II) Precatalysts for Suzuki–Miyaura Reactions of Aryl Carbonates
作者:Emily L. Barth、Ryan M. Davis、Megan Mohadjer Beromi、Andrew G. Walden、David Balcells、Gary W. Brudvig、Amira H. Dardir、Nilay Hazari、Hannah M. C. Lant、Brandon Q. Mercado、Ian L. Peczak
DOI:10.1021/acs.organomet.9b00543
日期:2019.9.9
(dcypf)Ni(2-ethylphenyl)(Br), which contains a bidentate phosphine that binds in a trans geometry, is an effective precatalyst for these reactions for two reasons: (i) it rapidly forms the Ni(0) active species and (ii) it minimizes comproportionation reactions between the Ni(0) active species and both the unactivated Ni(II) precatalyst and on-cycle Ni(II) complexes to form catalytically inactive Ni(I)
Suzuki-Miyaura Cross-Coupling Reactions in Flow: Multistep Synthesis Enabled by a Microfluidic Extraction
作者:Timothy Noël、Simon Kuhn、Andrew J. Musacchio、Klavs F. Jensen、Stephen L. Buchwald
DOI:10.1002/anie.201101480
日期:2011.6.20
Continuous success: A continuous‐flowSuzuki–Miyaura cross‐coupling reaction starting from phenols was made possible through use of an efficient microfluidicextraction operation and a packed‐bed reactor. Various biaryls were obtained in excellent yield (14 examples). TBAB=Bu4N+Br−.