Overview

This chapter provides abrief overview of organoborane reaction types. Reaction mechanisms are discussed, particularly with reference to whether they may or may not allow stereocontrol, but stereocontrolled applications are deferred to later chap- ters. Reactions that replace boron by atoms other than carbon are discussed first (Section 3. 2), followed by boron substituted carbanions (Section 3. 3) and reactions that have the net effect of replacing boron-carbon bonds by carbon-carbon bonds (Section 3. 4). However, ss-eliminations, which also create a carbon-carbon bond at the expense of a boron-carbon bond, are deferred to Section 4. 2. Finally, a variety of reactions of organoboranes that leave the boron-carbon bond intact and affect other functionality are described in Section 3. 5. 3. 2 Oxidative Replacement of Boron 3. 2. 1 Introduction Several oxidative boron-carbon bond cleavage reactions replace the boron atom stereospecifically with retention of configuration of the carbon atom, and therefore are particularly useful in asymmetric synthesis. These share the following general mechanistic features: (I) Coordination of an oxidizing agent having a nucleophilic site, (:Y_Z)-n (n = 0 or I), to the boron to form aborate complex (1). (2) Intramolecular migration of carbon from the electron-rich boron atom to the rela- tively electron-deficient atom Y with concurrent displacement of nucleofuge z-n, as illustrated by transition state 2 and product 3.

Full Product Details

Author:   Donald S. Matteson
Publisher:   Springer-Verlag Berlin and Heidelberg GmbH & Co. KG
Imprint:   Springer-Verlag Berlin and Heidelberg GmbH & Co. K
Edition:   Softcover reprint of the original 1st ed. 1995
Volume:   32
Dimensions:   Width: 15.50cm , Height: 2.10cm , Length: 23.50cm
Weight:   0.633kg
ISBN:  

9783642797118

ISBN 10:   3642797113
Pages:   405
Publication Date:   29 December 2011
Audience:   Professional and scholarly ,  Professional & Vocational
Format:   Paperback
Publisher's Status:   Active
Availability:   Manufactured on demand  
We will order this item for you from a manufactured on demand supplier.

Table of Contents

1 Introduction to Borane Chemistry.- 1.1 Beginnings.- 1.2 Structure and Bonding in Organoboranes.- 1.3 General Chemical Properties of Organoboranes.- 1.4 Safety Considerations.- 1.5 References.- 2 Sources of Compounds Containing Boron—Carbon Bonds.- 2.1 Industrial Sources of Boron Compounds.- 2.2 The Organometallic Route.- 2.3 Hydroboration.- 2.4 Haloborations.- 2.5 Other Routes to Carbon—Boron Bonds.- 2.6 References.- 3 General Reactions of Organoboranes.- 3.1 Introduction.- 3.2 Oxidative Replacement of Boron.- 3.3 Boron Substituted Carbanions.- 3.4 Replacement of Boron by Carbon.- 3.5 Reactions at Sites Other than the B-C Bond.- 3.6 References.- 4 Alkenylboranes and Control of Olefinic Geometry.- 4.1 Introduction.- 4.2 ?-Elimination Routes to Unsaturated Compounds.- 4.3 The Suzuki Coupling Reaction.- 4.4 Other Stereoselective Routes to Alkenes.- 4.5 References.- 5 Asymmetric Synthesis via (a-Haloalkyl)boronic Esters.- 5.1 Introduction.- 5.2 Synthetic Methodology: Pinanediol Esters.- 5.3 Synthetic Methodology: Chiral Directors Having C2 Symmetry.- 5.4 Synthetic Applications.- 5.5 References.- 6 Asymmetric Hydroboration Chemistry.- 6.1 Introduction.- 6.2 Asymmetric Hydroboration.- 6.3 Transformations of Asymmetric Organoboranes.- 6.4 Substrate Directed Hydroboration.- 6.5 Catalytic Asymmetric Hydroboration.- 6.6 References.- 7 Allylboron and Boron Enolate Chemistry.- 7.1 Introduction.- 7.2 Allylic Boronic Esters.- 7.3 Allyldialkylboranes.- 7.4 Boron Enolates.- 7.5 References.- 8 Diels-Alder Reactions.- 8.1 Introduction.- 8.2 Alkenylboranes.- 8.3 Butadienylboranes.- 8.4 Catalyzed Diels-Alder Reactions.- 8.5 References.- 9 Asymmetric Reductions and Miscellaneous Reactions.- 9.1 Introduction.- 9.2 Reductions with Alkylboranes.- 9.3 Reductions with Asymmetric B-HCompounds.- 9.4 Other Borane Catalyzed Reactions.- 9.5 Asymmetric Hydrozirconation.- 9.6 References.- Author Index.

Reviews

. ..this is the type of book that could only be written by a scholar who has devoted many years to organoboron chemistry. Matteson has done it, and done it well. - Synthesis

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