C-X Bond Formation

C-X Bond Formation
Author: Arkadi Vigalok
Publisher: Springer Science & Business Media
Total Pages: 198
Release: 2010-07-09
Genre: Science
ISBN: 3642120725

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Contents: Kilian Muñiz: Transition Metal Catalyzed Electrophilic Halogenation of C-H bonds in alpha-Position to Carbonyl Groups; Arkadi Vigalok * and Ariela W Kaspi: Late Transition Metal-Mediated Formation of Carbon-Halogen Bonds; Paul Bichler and Jennifer A. Love*: Organometallic Approaches to Carbon-Sulfur Bond Formation; David S. Glueck: Recent Advances in Metal-Catalyzed C-P Bond Formation; Andrei N. Vedernikov: C-O Reductive Elimination from High Valent Pt and Pd Centers; Lukas Hintermann: Recent Developments in Metal-Catalyzed Additions of Oxygen Nucleophiles to Alkenes and Alkynes; Moris S. Eisen: Catalytic C-N, C-O and C-S bond formation promoted by organoactinide complexes.

C-X Bond Formation

C-X Bond Formation
Author: Arkadi Vigalok
Publisher: Springer
Total Pages: 198
Release: 2010-06-30
Genre: Science
ISBN: 3642120733

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Contents: Kilian Muñiz: Transition Metal Catalyzed Electrophilic Halogenation of C-H bonds in alpha-Position to Carbonyl Groups; Arkadi Vigalok * and Ariela W Kaspi: Late Transition Metal-Mediated Formation of Carbon-Halogen Bonds; Paul Bichler and Jennifer A. Love*: Organometallic Approaches to Carbon-Sulfur Bond Formation; David S. Glueck: Recent Advances in Metal-Catalyzed C-P Bond Formation; Andrei N. Vedernikov: C-O Reductive Elimination from High Valent Pt and Pd Centers; Lukas Hintermann: Recent Developments in Metal-Catalyzed Additions of Oxygen Nucleophiles to Alkenes and Alkynes; Moris S. Eisen: Catalytic C-N, C-O and C-S bond formation promoted by organoactinide complexes.

C-H and C-X Bond Functionalization

C-H and C-X Bond Functionalization
Author: Xavi Ribas
Publisher: Royal Society of Chemistry
Total Pages: 489
Release: 2013-05-24
Genre: Science
ISBN: 1849737169

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Cross-coupling reactions involving C-H and C-X bond functionalisation are commonplace in natural product synthesis and natural products, therapeutic agents, biological probes, and advanced materials. Much attention has been given to understanding the mechanistic strategies used to achieve this, making this a hot topic in recent years. In this edited book, contributions from across the globe examine these strategies, with a particular focus on palladium and copper, as well as iron – an emerging element in this field. Reviewing the recent literature, the book presents an in-depth understanding of the field, guiding the reader to achieving the best synthetic strategies for aromatic functionalisation. Organic and Organometallic chemists, as well as natural product and pharmaceutical scientists, will find this an essential guide to a major transformation currently underway in synthetic chemistry.

C-H and C-X Bond Functionalization

C-H and C-X Bond Functionalization
Author: Xavi Ribas
Publisher: Royal Society of Chemistry
Total Pages: 489
Release: 2013
Genre: Science
ISBN: 1849735700

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Cross-coupling reactions involving C-H and C-X bond functionalisation are commonplace in natural product synthesis and natural products, therapeutic agents, biological probes, and advanced materials. Much attention has been given to understanding the mechanistic strategies used to achieve this, making this a hot topic in recent years. In this edited book, contributions from across the globe examine these strategies, with a particular focus on palladium and copper, as well as iron û an emerging element in this field. Reviewing the recent literature, the book presents an in-depth understanding of the field, guiding the reader to achieving the best synthetic strategies for aromatic functionalisation. Organic and Organometallic chemists, as well as natural product and pharmaceutical scientists, will find this an essential guide to a major transformation currently underway in synthetic chemistry.

C-X Bond Formation with Tridentate Nacnac Based Pyridine-imine Ligands and Study of a Tetradentate Diimine Redox Non-innocent Ligand

C-X Bond Formation with Tridentate Nacnac Based Pyridine-imine Ligands and Study of a Tetradentate Diimine Redox Non-innocent Ligand
Author: Wesley Daniel Morris
Publisher:
Total Pages: 151
Release: 2014
Genre:
ISBN:

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First row transition metals are attractive candidates for catalysis because they are much more abundant, cheaper, and less toxic than their 2nd and 3rd row congeners. Unfortunately, these first row metals typically promote one electron (radical) processes instead of the two electron transformations observed in oxidation/reduction and bond breaking/forming reactions. One way around this is to use redox noninnocent ligands that have the capacity to store electrons and then release them over the course of the catalytic cycle to limit the oxidation state changes that occur at the metal center. The goal of this work was to expand the scope of redox non-innocent ligands in development of new catalytic processes. A tridentate ligand was synthesized that contained a 2-pyridine methylamine arm on a nacnac ligand backbone. Deprotonation at the methylene position formed a new redox non-innocent ligand that was stable only in the bis-reduced form chelated to Fe(II). The neutral ligand was prone to intramolecular cyclization via C-N bond formation to form a new pyrimidine ring structure while the monoanionic ligand was prone to reductive coupling with formation of a new carbon-carbon bond. This system showed a strong preference for maintaining a ferrous state of iron with C-C or C-N bond formation observed when the redox noninnocent ligand was in its neutral or mono-anionic form. A tetradentate ligand was synthesized with diimine and orthophenylenediamine functionalities that could exist in 5 different oxidation states from neutral to tetraanionic, which should support group transfer reactivity. The ligand was installed on iron and manganese to form standard M+2 coordination compounds. The corresponding chromium compound showed a different electronic structure consistent with a reduced ligand. Remarkably, it was shown calculationally to have an S=1 ligand antiferromagnetically coupled to a high spin Cr2+ metal center. Cyclic voltammetric measurements exhibited two reversible one-electron ligand reductions as well as three quasi-reversible oxidations consistent with 1 metal based oxidation and two ligand based oxidations.

Carbon-Carbon ?-Bond Formation

Carbon-Carbon ?-Bond Formation
Author: G. Pattenden
Publisher: Elsevier
Total Pages: 1209
Release: 1992-09-08
Genre: Science
ISBN: 008091246X

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Volume 3 covers carbon-to-carbon single bond forming reactions involving sp3, sp2 and sp carbon centers, but only those which do not involve additions to C-X &pgr;-bonds. The volume first compares and contrasts the alkylation reactions of all types of sp3 carbon nucleophiles and also covers vinyl and alkynyl carbanions. Following on from Volume 2, a separate section covers Friedel-Crafts alkylation reactions, which is complemented by discussions of polyene cyclizations and electrophilic transannular cyclizations in synthesis. Coupling reactions leading to &agr;-bond formation, and involving all types of combinations ofsp3, sp2 and sp carbon centers are next covered, including those reactions based on pinacol, acyloin and phenol oxidative coupling reactions, and also the Kolbe reaction. Rearrangement reactions, leading to carbon-to-carbon &agr;-bond formation, are often used in a clever manner in synthesis. The volume includes all those rearrangement reactions based on intermediate carbonium ions and carbanions, and also includes the benzil-benzilic acid and the Wolff rearrangements. The volume closes with coverage of carbonylation reactions, and the use of carbene insertion reactions into the C-H bond in synthesis.

Oxidative Cross-Coupling Reactions

Oxidative Cross-Coupling Reactions
Author: Aiwen Lei
Publisher: John Wiley & Sons
Total Pages: 240
Release: 2016-08-12
Genre: Technology & Engineering
ISBN: 3527681019

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The first handbook on this emerging field provides a comprehensive overview of transition metal-catalyzed coupling reactions in the presence of an oxidant. Following an introduction to the general concept and mechanism of this reaction class, the team of authors presents chapters on C-C cross-coupling reactions using organometallic partners, C-Heteroatom bond forming reactions via oxidative couplings, and C-H couplings via C-H activation. The text also covers such groundbreaking topics as recent achievements in the fields of C-C and C-X bond formation reactions as well as C-H activation involving oxidative couplings. With its novel and concise approach towards important building blocks in organic chemistry and its focus on synthetic applications, this handbook is of great interest to all synthetic chemists in academia and industry alike.

Carbon-carbon Bond Formation

Carbon-carbon Bond Formation
Author: Robert L. Augustine
Publisher: CRC Press
Total Pages: 480
Release: 1979-04-01
Genre: Science
ISBN: 9780824767877

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