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Dienamine Catalysis for Organic Synthesis

Dienamine Catalysis for Organic Synthesis

Kengadarane Anebouselvy | Dhevalapally B Ramachary | Indresh Kumar

(2018)

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Abstract

In the past decade a new era in asymmetric catalysis has been realised by the discovery of L-proline induced chiral enamines from carbonyls. Inspired by this, researchers have developed many other primary catalytic species in situ, more recently secondary catalytic species such as aminals have been identified for use in asymmetric synthesis.

High-yielding asymmetric synthesis of bioactive and natural products through mild catalysis is an efficient approach in reaction engineering. In the early days, synthetic chemists mainly focused on the synthesis of complex molecules, with less attention on the reaction efficiency and eco-friendly conditions. Recent investigations have been directed towards the development of atom economy, eco-friendly and enantioselective synthesis for more targeted and efficient synthesis.

Building on the momentum of this rapidly expanding research area, Dienamine Catalysis for Organic Synthesis will provide a comprehensive introduction, from the preformed species, in situ generation and onto their applications in the synthesis of bioactive molecules and natural products.


Table of Contents

Section Title Page Action Price
Cover Cover
Dienamine Catalysis for Organic Synthesis i
Preface vii
Dedication† ix
Contents xi
Chapter 1 - Introduction to Dienamine Chemistry 1
1.1 Origin of Dienamine Catalysis 1
1.2 Various Types of Dienamine Intermediates 3
1.3 Significance of Dienamine Intermediates in Diels–Alder Type Reactions 3
1.4 Conclusion 7
References 7
Chapter 2 - Synthesis and Applications of Preformed Dienamines 10
2.1 Introduction 10
2.2 1-Aminobuta-1,3-dienes 11
2.3 2-Aminobuta-1,3-dienes 16
2.4 Conclusion 22
References 22
Chapter 3 - Barbas Dienamines (2-Aminobuta-1,3-Dienes): Scope and Applications 24
3.1 Introduction 24
3.2 [4+2]-Cycloadditions 25
3.3 Michael Reactions 48
3.4 Conclusion 50
Acknowledgements 51
References 51
Chapter 4 - Ramachary’s Dienamines (Push–Pull Dienamines): In situ Generation and Applications 53
4.1 Introduction 53
4.2 Cascade or Domino Reactions 54
4.3 [3+2]-Cycloadditions 60
4.4 Baylis–Hillman-type Reactions 62
4.5 Conclusion 63
Acknowledgement 64
References 64
Chapter 5 - Serebryakov–Jørgensen Dienamines (1-Aminobuta-1,3-Dienes): Different In situ Generation Methods and Applications in [4+2]-Cycloadditions 65
5.1 Introduction 65
5.2 Serebryakov–Jørgensen Dienamines Participating as Electron-rich Dienes 66
5.3 Serebryakov–Jørgensen Dienamines Participating as Electron-rich Dienophiles 81
5.4 Conclusion 93
References 94
Chapter 6 - Serebryakov–Jørgensen Dienamines (1-Aminobuta-1,3-Dienes): Different In situ Generation Methods and Applications in [2+2], [3+2] and a Few Other Cycloadditions 96
6.1 Introduction 96
6.2 Serebryakov–Jørgensen Dienamines in [2+2]-Cycloadditions 97
6.3 Serebryakov–Jørgensen Dienamines in [3+2]-Cycloadditions 102
6.4 Serebryakov–Jørgensen Dienamines in Other Cycloadditions 107
6.4.1 [5+3]-Cycloadditions 107
6.4.2 [5+2]-Cycloadditions 107
6.4.3 [3+3]-Cycloadditions 109
6.5 Conclusion 110
References 111
Chapter 7 - Asymmetric α-Selective and Remote γ-Selective Functionalization of Enals and Enones Through Serebryakov–Jørgensen Dienamines (1-Aminobuta-1,3-Dienes) 112
7.1 Introduction 112
7.2 Serebryakov–Jørgensen Dienamines in α-Selective Functionalization of Enals and Enones 113
7.3 Serebryakov–Jørgensen Dienamines in the Remote Asymmetric γ-Selective Functionalization of Enals and Enones 118
7.4 Conclusion 133
References 134
Chapter 8 - Applications of Serebryakov–Jørgensen Dienamines (1-Aminobuta-1,3-Dienes) in Domino or Cascade Reactions 136
8.1 Introduction 136
8.2 Serebryakov–Jørgensen Dienamines in Domino or Cascade Reactions 137
8.3 Conclusion 148
References 149
Chapter 9 - Aminoenyne (2-Aminobuta-1,3-Enyne) Catalysis: In situ Generation and Synthetic Applications in Organic Reactions 150
9.1 Introduction 150
9.2 Aminoenyne Intermediates in Organic Reactions 151
9.3 Conclusion 156
Acknowledgement 157
References 157
Chapter 10 - Trienamine-catalyzed Stereoselective Cycloadditions and Other Remote Functionalizations of Polyconjugated Enals/Enones 158
10.1 Introduction 158
10.2 Linear Trienamine Catalysis 161
10.2.1 Trienamine Catalysis of Unsubstituted Dienals 161
10.2.2 Trienamine Catalysis of Substituted Dienals 163
10.2.3 Ortho-quinodimethanes and Related Trienamine Catalysis 170
10.2.4 Remote Reactivity of Both Reacting Partners 171
10.2.5 Trienamine Catalysis from Unconjugated Dienals 174
10.2.6 Trienamine Catalysis with C=X as Dienophiles 175
10.2.7 Hydrogen-bond Activation Directed Trienamine Catalysis 177
10.3 Trienamine Catalysis Using Dienone 181
10.3.1 Dienones Activation Through Trienamine Catalysis 181
10.3.2 Catalysis Through Trienamine Derived from Unconjugated Enones 182
10.4 Cross-conjugated Activation in Trienamine Catalysis 185
10.5 Non-classical Trienamine Catalysis 187
10.6 Conclusion 189
References 190
Chapter 11 - Tetraenamine-catalyzed Stereoselective Cycloadditions of Polyunsaturated Carbonyl Compounds 194
11.1 Introduction 194
11.2 [4+2]-Cycloadditions via Tetraenamine Intermediates 196
11.3 Conclusions 198
References 198
Subject Index 199