Nickel-catalyzed cross-coupling reactions of benzylic zinc reagents with aromatic bromides, chlorides and tosylates
作者:Matthias A. Schade、Albrecht Metzger、Stephan Hug、Paul Knochel
DOI:10.1039/b803072c
日期:——
Benzylic zinc reagents prepared by direct insertion of zinc to benzylic chlorides in the presence of LiCl undergo smooth cross-coupling reactions with aromatic chlorides, bromides and tosylates using Ni(acac)(2) and PPh(3) as a catalyst system.
A Mild and Efficient Palladium-Catalyzed Cyanation of Aryl Mesylates in Water or tBuOH/Water
作者:Pui Yee Yeung、Chau Ming So、Chak Po Lau、Fuk Yee Kwong
DOI:10.1002/anie.201005121
日期:2010.11.15
Cool and compatible: Arylmesylates and tosylates underwent palladium‐catalyzed cyanation under mild, aqueous conditions at 65–80 °C (see scheme). In many cases, water could be used as the reaction medium without a cosolvent, and a variety of substituents R, such as keto, aldehyde, ester, free amine, and nitrile groups, remained intact during the transformation. Cy=cyclohexyl, Ms=methanesulfonyl,
An Examination of the Palladium/Mor-DalPhos Catalyst System in the Context of Selective Ammonia Monoarylation at Room Temperature
作者:Pamela G. Alsabeh、Rylan J. Lundgren、Robert McDonald、Carin C. C. Johansson Seechurn、Thomas J. Colacot、Mark Stradiotto
DOI:10.1002/chem.201203640
日期:2013.2.4
(Mor‐DalPhos=di(1‐adamantyl)‐2‐morpholinophenylphosphine) catalyst system in Buchwald–Hartwig aminations employing ammonia was conducted to better understand the catalyst formation process and to guide the development of precatalysts for otherwise challenging room‐temperature ammoniamonoarylations. The combination of [Pd(cinnamyl)Cl}2] and Mor‐DalPhos afforded [(κ2‐P,N‐Mor‐DalPhos)Pd(η1‐cinnamyl)Cl] (2)
Nickel-catalyzed C–P cross-coupling of (het)aryl tosylates with secondary phosphine oxides
作者:Xiao-Yun He
DOI:10.1177/1747519821994533
日期:2021.7
A novel and convenient approach to the synthesis of various tertiary phosphine oxides via nickel-catalyzedcross-coupling of (het)aromatic tosylates with secondary phosphine oxides is developed. The reaction employs cheap nickel as the catalyst, 1-(2-(di-tert-butylphosphanyl)phenyl)-4-methoxypiperidine (L3) as the ligand, and pyridine as the base. This reaction produces the corresponding (het)aromatic
A nickel precatalyst for efficient cross-coupling reactions of aryl tosylates with arylboronic acids: vital role of dppf
作者:Feng Hu、Xiangyang Lei
DOI:10.1016/j.tet.2014.04.059
日期:2014.6
An air-stable and easy-to-handle nickelprecatalyst, (9-phenanthrenyl)Ni(II)(PPh3)2Cl, was examined for the cross-couplingreactions of aryl tosylates with arylboronic acids. Under the optimized reaction conditions, the catalytic system tolerates a wide range of activated, neutral and deactivated substrates. The selectivity of this cross-couplingreaction towards aryl tosylates and arylboronic acids