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Bondzić BP, Daskalakis K, Taniguchi T, Monde K, Hayashi Y. Stereoselective Construction of Fluorinated Quaternary Stereogenic Centers via an Organocatalytic Asymmetric exo-Selective Diels-Alder Reaction in the Presence of Water. Org Lett 2022; 24:7455-7460. [PMID: 36190808 DOI: 10.1021/acs.orglett.2c03043] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
A catalytic, asymmetric Diels-Alder reaction of α-fluoro α,β-unsaturated aldehydes and cyclopentadiene was developed using diarylprolinol silyl ether as an organocatalyst. The reaction proceeds in toluene with trifluoroacetic acid as an additive (condition A). Perchloric acid salt of diarylprolinol silyl ether also promotes the reaction using water as a reaction medium (condition B). In both cases, excellent exo-selectivity and enantioselectivity were obtained with generation of a fluorinated quaternary chiral center.
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Affiliation(s)
- Bojan P Bondzić
- University of Belgrade, Institute of Chemistry, Technology and Metallurgy, National Institute of the Republic of Serbia, Njegoševa 12, 11 000 Belgrade, Serbia
| | - Konstantinos Daskalakis
- Department of Chemistry, Graduate School of Science, Tohoku University, 6-3 Aramaki Aza-Aoba, Aoba-ku, Sendai, Miyagi 980-8578, Japan
| | - Tohru Taniguchi
- Frontier Research Center for Advanced Material and Life Science, Faculty of Advanced Life Science, Hokkaido University, Sapporo 001-0021, Japan
| | - Kenji Monde
- Frontier Research Center for Advanced Material and Life Science, Faculty of Advanced Life Science, Hokkaido University, Sapporo 001-0021, Japan
| | - Yujiro Hayashi
- Department of Chemistry, Graduate School of Science, Tohoku University, 6-3 Aramaki Aza-Aoba, Aoba-ku, Sendai, Miyagi 980-8578, Japan
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Mendoza SD, Rombola M, Tao Y, Zuend SJ, Götz R, McLaughlin MJ, Reisman SE. Expanding the Chiral Monoterpene Pool: Enantioselective Diels-Alder Reactions of α-Acyloxy Enones. Org Lett 2022; 24:3802-3806. [PMID: 35594569 DOI: 10.1021/acs.orglett.2c01343] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
An enantioselective Diels-Alder (DA) reaction of α-acyloxy enones has been developed to synthesize chiral oxidized cyclohexenes. Yttrium(III) triflate, in conjunction with a chiral pyridinebisimidazoline (PyBim) ligand, was found to catalyze the asymmetric [4 + 2] cycloaddition with a variety of dienes and α-acyloxy enone dienophiles. Using this method, terpinene-4-ol, a key intermediate in the synthesis of commercial herbicide cinmethylin, can be prepared in four steps from isoprene. A combination of kinetic data and NMR studies support a mechanism involving reversible binding of a dienophile to a yttrium catalyst followed by cycloaddition with a diene as the rate-determining step.
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Affiliation(s)
- Skyler D Mendoza
- The Warren and Katharine Schlinger Laboratory for Chemistry and Chemical Engineering, Division of Chemistry and Chemical Engineering, California Institute of Technology, Pasadena, California 91125, United States
| | - Michael Rombola
- The Warren and Katharine Schlinger Laboratory for Chemistry and Chemical Engineering, Division of Chemistry and Chemical Engineering, California Institute of Technology, Pasadena, California 91125, United States
| | - Yujia Tao
- The Warren and Katharine Schlinger Laboratory for Chemistry and Chemical Engineering, Division of Chemistry and Chemical Engineering, California Institute of Technology, Pasadena, California 91125, United States
| | - Stephan J Zuend
- BASF Corporation, 46820 Fremont Boulevard, Fremont, California 94538, United States
| | - Roland Götz
- BASF SE, Carl Bosch Str. 38, Ludwigshafen 67056, Germany
| | | | - Sarah E Reisman
- The Warren and Katharine Schlinger Laboratory for Chemistry and Chemical Engineering, Division of Chemistry and Chemical Engineering, California Institute of Technology, Pasadena, California 91125, United States
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3
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α-Functionally Substituted α,β-Unsaturated Aldehydes as Fine Chemicals Reagents: Synthesis and Application. Molecules 2021; 26:molecules26144297. [PMID: 34299572 PMCID: PMC8306155 DOI: 10.3390/molecules26144297] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/16/2021] [Revised: 07/12/2021] [Accepted: 07/14/2021] [Indexed: 11/16/2022] Open
Abstract
α-Functionalized α,β-unsaturated aldehydes is an important class of compounds, which are widely used in fine organic synthesis, biology, medicine and pharmacology, chemical industry, and agriculture. Some of the 2-substituted 2-alkenals are found to be the key metabolites in plant and animal cells. Therefore, the development of efficient methods for their synthesis attracts the attention of organic chemists. This review focusses on the recent advances in the synthesis of 2-functionally substituted 2-alkenals. The approaches to the preparation of α-alkyl α,β-unsaturated aldehydes are not included in this review.
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Varlet T, Masson G. Enamides and dienamides in phosphoric acid-catalysed enantioselective cycloadditions for the synthesis of chiral amines. Chem Commun (Camb) 2021; 57:4089-4105. [DOI: 10.1039/d1cc00590a] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Abstract
This feature article describes how enamides and dienamides can participate in chiral phosphoric acid catalyzed enantioselective cycloadditions to prepare a wide range of cyclic amines.
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Affiliation(s)
- Thomas Varlet
- Université Paris-Saclay
- Institut de Chimie des Substances Naturelles
- ICSN-CNRS UPR 2301
- 91198 Gif-sur-Yvette
- France
| | - Géraldine Masson
- Université Paris-Saclay
- Institut de Chimie des Substances Naturelles
- ICSN-CNRS UPR 2301
- 91198 Gif-sur-Yvette
- France
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Merten C, Golub TP, Kreienborg NM. Absolute Configurations of Synthetic Molecular Scaffolds from Vibrational CD Spectroscopy. J Org Chem 2019; 84:8797-8814. [PMID: 31046276 DOI: 10.1021/acs.joc.9b00466] [Citation(s) in RCA: 72] [Impact Index Per Article: 14.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
Vibrational circular dichroism (VCD) spectroscopy is one of the most powerful techniques for the determination of absolute configurations (AC), as it does not require any specific UV/vis chromophores, no chemical derivatization, and no growth of suitable crystals. In the past decade, it has become increasingly recognized by chemists from various fields of synthetic chemistry such as total synthesis and drug discovery as well as from developers of asymmetric catalysts. This perspective article gives an overview about the most important experimental aspects of a VCD-based AC determination and explains the theoretical analysis. The comparison of experimental and computational spectra that leads to the final conclusion about the AC of the target molecules is described. In addition, the review summarizes unique VCD studies carried out in the period 2008-2018 that focus on the determination of unknown ACs of new compounds, which were obtained in its enantiopure form either through direct asymmetric synthesis or chiral chromatography.
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Affiliation(s)
- Christian Merten
- Ruhr Universität Bochum , Organische Chemie II , Universitätsstraße 150 , 44780 Bochum , Germany
| | - Tino P Golub
- Ruhr Universität Bochum , Organische Chemie II , Universitätsstraße 150 , 44780 Bochum , Germany
| | - Nora M Kreienborg
- Ruhr Universität Bochum , Organische Chemie II , Universitätsstraße 150 , 44780 Bochum , Germany
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Džambaski Z, Tzaras D, Lee S, Kokotos CG, Bondzic BP. Enantioselective Organocatalytic Enamine C−H Oxidation/Diels‐ Alder Reaction. Adv Synth Catal 2019. [DOI: 10.1002/adsc.201900061] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Affiliation(s)
- Zdravko Džambaski
- Center for Chemistry, ICTM instituteUniversity of Belgrade Njegoseva 12 11 000 Belgrade Serbia
| | - Dimitrios‐Ioannis Tzaras
- Laboratory of Organic Chemistry, Departmentof ChemistryNational and Kapodistrian University of Athens, Panepistimiopolis 15771 Athens Greece
| | - Sunggi Lee
- Max-Planck-Institut für Kohlenforschung Kaiser-Wilhelm-Platz 1 45470 Mülheim an der Ruhr Germany
| | - Christoforos G. Kokotos
- Laboratory of Organic Chemistry, Departmentof ChemistryNational and Kapodistrian University of Athens, Panepistimiopolis 15771 Athens Greece
| | - Bojan P. Bondzic
- Center for Chemistry, ICTM instituteUniversity of Belgrade Njegoseva 12 11 000 Belgrade Serbia
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Häggman NO, Zank B, Jun H, Kaldre D, Gleason JL. Diazepane Carboxylates as Organocatalysts in the Diels-Alder Reaction of α-Substituted Enals. European J Org Chem 2018. [DOI: 10.1002/ejoc.201801009] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Affiliation(s)
- Nicklas O. Häggman
- Department of Chemistry; McGill University; 801 Sherbrooke W. H3A 0B8 Montreal QC Canada
| | - Benjamin Zank
- Department of Chemistry; McGill University; 801 Sherbrooke W. H3A 0B8 Montreal QC Canada
| | - HyunJune Jun
- Department of Chemistry; McGill University; 801 Sherbrooke W. H3A 0B8 Montreal QC Canada
| | - Dainis Kaldre
- Department of Chemistry; McGill University; 801 Sherbrooke W. H3A 0B8 Montreal QC Canada
| | - James L. Gleason
- Department of Chemistry; McGill University; 801 Sherbrooke W. H3A 0B8 Montreal QC Canada
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Taniguchi T. Analysis of Molecular Configuration and Conformation by (Electronic and) Vibrational Circular Dichroism: Theoretical Calculation and Exciton Chirality Method. BULLETIN OF THE CHEMICAL SOCIETY OF JAPAN 2017. [DOI: 10.1246/bcsj.20170113] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Affiliation(s)
- Tohru Taniguchi
- Faculty of Advanced Life Science, Frontier Research Center for Advanced Material and Life Science, Hokkaido University, Kita 21 Nishi 11, Sapporo, Hokkaido 001-0021
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Larnaud F, Sulpizi A, Häggman NO, Hughes JME, Dewez DF, Gleason JL. Organocatalytic Michael Addition of Indoles to α-Substituted Enals by Using a Diazepane Carboxylate Catalyst. European J Org Chem 2017. [DOI: 10.1002/ejoc.201700469] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Florent Larnaud
- Department of Chemistry; McGill University; 801 Sherbrooke W. H3A 0B8 Montreal QC Canada
| | - Adamo Sulpizi
- Department of Chemistry; McGill University; 801 Sherbrooke W. H3A 0B8 Montreal QC Canada
| | - Nicklas O. Häggman
- Department of Chemistry; McGill University; 801 Sherbrooke W. H3A 0B8 Montreal QC Canada
| | - Jonathan M. E. Hughes
- Department of Chemistry; McGill University; 801 Sherbrooke W. H3A 0B8 Montreal QC Canada
| | - Damien F. Dewez
- Department of Chemistry; McGill University; 801 Sherbrooke W. H3A 0B8 Montreal QC Canada
| | - James L. Gleason
- Department of Chemistry; McGill University; 801 Sherbrooke W. H3A 0B8 Montreal QC Canada
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Klier L, Tur F, Poulsen PH, Jørgensen KA. Asymmetric cycloaddition reactions catalysed by diarylprolinol silyl ethers. Chem Soc Rev 2017; 46:1080-1102. [DOI: 10.1039/c6cs00713a] [Citation(s) in RCA: 152] [Impact Index Per Article: 21.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
Organocatalysis as a paint palette for asymmetric cycloaddition reactions.
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Affiliation(s)
- Lydia Klier
- Department of Chemistry
- Aarhus University
- DK-8000 Aarhus C
- Denmark
| | - Fernando Tur
- Department of Chemistry
- Aarhus University
- DK-8000 Aarhus C
- Denmark
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