scispace - formally typeset
Search or ask a question
Author

Anne Eeg Jensen

Bio: Anne Eeg Jensen is an academic researcher from Ludwig Maximilian University of Munich. The author has contributed to research in topics: Aryl & Coupling reaction. The author has an hindex of 7, co-authored 14 publications receiving 483 citations.

Papers
More filters
Journal ArticleDOI
TL;DR: In the presence of Bu(4)NI (3 equiv) and 4-fluorostyrene (20 mol %), unreactive primary and secondary alkylzinc iodides undergo nickel-catalyzed cross-couplings with various primaryAlkyl iodides or bromides allowing the synthesis of aminated products.
Abstract: In the presence of Bu4NI (3 equiv) and 4-fluorostyrene (20 mol %), unreactive primary and secondary alkylzinc iodides undergo nickel-catalyzed cross-couplings with various primary alkyl iodides or bromides. More reactive secondary dialkylzincs and the mixed zinc organometallics RZnTMSM undergo the cross-coupling reaction in the absence of Bu4NI. The bicyclic secondary diorganozinc 6 prepared via boron−zinc exchange reacts with high retention of configuration. Free NH-groups are tolerated in the cross-coupling allowing the synthesis of aminated products.

180 citations

Journal ArticleDOI
TL;DR: The addition of Bu4NI has been found to accelerate the palladium(0)-catalyzed cross-coupling between benzylic zinc bromides and aryl or alkenyl triflates leading to polyfunctional products in good yields under mild reaction conditions.

110 citations

Journal ArticleDOI
TL;DR: The iodine-magnesium exchange, represent a unique method for the preparation of aryl and heteroaryl magnesium reagents that can be either trapped directly with aldehydes or transmetallated to copper or zinc to participate in cross-coupling reactions.
Abstract: Functionalized magnesium reagents have been prepared via an iodine-magnesium exchange. These reagents can be either trapped directly with aldehydes or transmetallated to copper or zinc to participate in cross-coupling reactions. The iodine-magnesium exchange, represent a unique method for the preparation of aryl and heteroaryl magnesium reagents.

79 citations

Journal ArticleDOI
TL;DR: Functionalized Grignard reagents, derived from readily available o-iodoaniline derivatives and obtained via a straightforward iodine-magnesium exchange, can be used to prepare a wide range of polyfunctional indoles, quinolines, and quinazolinones.

52 citations

Journal ArticleDOI
TL;DR: In this paper, aryl iodides and nonaflates undergo nickel-catalyzed cross-coupling reactions with functionalized alkylzinc iodides in the solid-phase as well as in solution providing high HPLC purities and good yields.

26 citations


Cited by
More filters
Journal ArticleDOI
TL;DR: The basics of Pd-NHC chemistry are discussed to understand the peculiarities of these catalysts and a critical discussion on their application in C-C and C-N cross-coupling as well as carbopalladation reactions is given.
Abstract: Palladium-catalyzed C-C and C-N bond-forming reactions are among the most versatile and powerful synthetic methods. For the last 15 years, N-heterocyclic carbenes (NHCs) have enjoyed increasing popularity as ligands in Pd-mediated cross-coupling and related transformations because of their superior performance compared to the more traditional tertiary phosphanes. The strong sigma-electron-donating ability of NHCs renders oxidative insertion even in challenging substrates facile, while their steric bulk and particular topology is responsible for fast reductive elimination. The strong Pd-NHC bonds contribute to the high stability of the active species, even at low ligand/Pd ratios and high temperatures. With a number of commercially available, stable, user-friendly, and powerful NHC-Pd precatalysts, the goal of a universal cross-coupling catalyst is within reach. This Review discusses the basics of Pd-NHC chemistry to understand the peculiarities of these catalysts and then gives a critical discussion on their application in C-C and C-N cross-coupling as well as carbopalladation reactions.

1,471 citations

Journal ArticleDOI
TL;DR: Nickel-Catalyzed Cross-Couplings Involving Carbon-Oxygen Bonds Brad M. Rosen, Kyle W. Quasdorf, Daniella A. Wilson, Na Zhang, Ana-Maria Resmerita, Neil K. Garg, and Virgil Percec report on cross-coupling strategies for high-performance liquid chromatography of carbon dioxide and nitrogen.
Abstract: Nickel-Catalyzed Cross-Couplings Involving Carbon-Oxygen Bonds Brad M. Rosen, Kyle W. Quasdorf, Daniella A. Wilson, Na Zhang, Ana-Maria Resmerita, Neil K. Garg,* and Virgil Percec* Roy & Diana Vagelos Laboratories, Department of Chemistry, University of Pennsylvania, Philadelphia, Pennsylvania 19104-6323, United States Department of Chemistry and Biochemistry, University of California, Los Angeles, California 90095, United States

1,100 citations

Journal ArticleDOI
TL;DR: This Minireview highlights selected examples of metal-catalyzed coupling methods and is intended to encourage chemists to exploit the potential of these approaches in organic synthesis.
Abstract: Despite the problems inherent to metal-catalyzed cross-coupling reactions with alkyl halides, these reactions have become increasingly important during the last few years. Detailed mechanistic investigations have led to a variety of novel procedures for the selective cross-coupling of non-activated alkyl halides bearing β hydrogen atoms with a variety of organometallic nucleophiles under mild reaction conditions. This Minireview highlights selected examples of metal-catalyzed coupling methods and is intended to encourage chemists to exploit the potential of these approaches in organic synthesis.

739 citations

Journal ArticleDOI
TL;DR: Recently, the halogen-magnesium exchange has considerably extended the range of functionalized Grignard reagents available for synthetic purposes and new applications of organomagnesium reagents in cross-coupling reactions and amination reactions will be covered in this Review.
Abstract: Organomagnesium reagents occupy a central position in synthetic organic and organometallic chemistry. Recently, the halogen-magnesium exchange has considerably extended the range of functionalized Grignard reagents available for synthetic purposes. Functional groups such as esters, nitriles, iodides, imines, or even nitro groups can be present in a wide range of aromatic and heterocyclic organomagnesium reagents. Also various highly functionalized alkenyl magnesium species can be prepared. These recent developments as well as new applications of organomagnesium reagents in cross-coupling reactions and amination reactions will be covered in this Review.

660 citations