1
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Pecchini P, Fochi M, Bartoccini F, Piersanti G, Bernardi L. Enantioselective organocatalytic strategies to access noncanonical α-amino acids. Chem Sci 2024; 15:5832-5868. [PMID: 38665517 PMCID: PMC11041364 DOI: 10.1039/d4sc01081g] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/15/2024] [Accepted: 03/23/2024] [Indexed: 04/28/2024] Open
Abstract
Organocatalytic asymmetric synthesis has evolved over the years and continues to attract the interest of many researchers worldwide. Enantiopure noncanonical amino acids (ncAAs) are valuable building blocks in organic synthesis, medicinal chemistry, and chemical biology. They are employed in the elaboration of peptides and proteins with enhanced activities and/or improved properties compared to their natural counterparts, as chiral catalysts, in chiral ligand design, and as chiral building blocks for asymmetric syntheses of complex molecules, including natural products. The linkage of ncAA synthesis and enantioselective organocatalysis, the subject of this perspective, tries to imitate the natural biosynthetic process. Herein, we present contemporary and earlier developments in the field of organocatalytic activation of simple feedstock materials, providing potential ncAAs with diverse side chains, unique three-dimensional structures, and a high degree of functionality. These asymmetric organocatalytic strategies, useful for forging a wide range of C-C, C-H, and C-N bonds and/or combinations thereof, vary from classical name reactions, such as Ugi, Strecker, and Mannich reactions, to the most advanced concepts such as deracemisation, transamination, and carbene N-H insertion. Concurrently, we present some interesting mechanistic studies/models, providing information on the chirality transfer process. Finally, this perspective highlights, through the diversity of the amino acids (AAs) not selected by nature for protein incorporation, the most generic modes of activation, induction, and reactivity commonly used, such as chiral enamine, hydrogen bonding, Brønsted acids/bases, and phase-transfer organocatalysis, reflecting their increasingly important role in organic and applied chemistry.
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Affiliation(s)
- Pietro Pecchini
- Department of Industrial Chemistry "Toso Montanari", Center for Chemical Catalysis C3 & INSTM RU Bologna V. Gobetti 85 40129 Bologna Italy
| | - Mariafrancesca Fochi
- Department of Industrial Chemistry "Toso Montanari", Center for Chemical Catalysis C3 & INSTM RU Bologna V. Gobetti 85 40129 Bologna Italy
| | - Francesca Bartoccini
- Department of Biomolecular Sciences, University of Urbino Carlo Bo Piazza Rinascimento 6 61029 Urbino PU Italy
| | - Giovanni Piersanti
- Department of Biomolecular Sciences, University of Urbino Carlo Bo Piazza Rinascimento 6 61029 Urbino PU Italy
| | - Luca Bernardi
- Department of Industrial Chemistry "Toso Montanari", Center for Chemical Catalysis C3 & INSTM RU Bologna V. Gobetti 85 40129 Bologna Italy
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2
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Das TK, Rodriguez Treviño AM, Pandiri S, Irvankoski S, Siito-Nen JH, Rodriguez SM, Yousufuddin M, Kürti L. Catalyst-Free Transfer Hydrogenation of Activated Alkenes Exploiting Isopropanol as the Sole and Traceless Reductant. GREEN CHEMISTRY : AN INTERNATIONAL JOURNAL AND GREEN CHEMISTRY RESOURCE : GC 2023; 25:746-754. [PMID: 37637778 PMCID: PMC10457099 DOI: 10.1039/d2gc04315g] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 08/29/2023]
Abstract
Both metal-catalyzed and organocatalytic transfer hydrogenation reactions are widely employed for the reduction of C=O and C=N bonds. However, selective transfer hydrogenation reactions of C=C bonds remain challenging. Therefore, the chemoselective transfer hydrogenation of olefins under mild conditions and in the absence of metal catalysts, using readily available and inexpensive reducing agents (i.e. primary and secondary alcohols), will mark a significant advancement towards the development of green transfer hydrogenation strategies. Described herein is an unconventional catalyst-free transfer hydrogenation reaction of activated alkenes using isopropanol as an eco-friendly reductant and solvent. The reaction gives convenient synthetic access to a wide range of substituted malonic acid half oxyesters (SMAHOs) in moderate to good yields. Mechanistic investigations point towards an unprecedented hydrogen bond-assisted transfer hydrogenation process.
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Affiliation(s)
- Tamal Kanti Das
- Department of Chemistry, Rice University, Houston, Texas 77030, USA
| | | | - Sanjay Pandiri
- Department of Chemistry, Rice University, Houston, Texas 77030, USA
| | - Sini Irvankoski
- Department of Chemistry and Materials Science, Aalto University, FI-02150 Espoo, Finland
| | - Juha H Siito-Nen
- Department of Chemistry and Materials Science, Aalto University, FI-02150 Espoo, Finland
| | - Sara M Rodriguez
- Department of Natural Sciences, University of North Texas at Dallas, Dallas, Texas 75241, USA
| | - Muhammed Yousufuddin
- Department of Natural Sciences, University of North Texas at Dallas, Dallas, Texas 75241, USA
| | - László Kürti
- Department of Chemistry, Rice University, Houston, Texas 77030, USA
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3
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Maliekal PJ, Gulvi N, Badani PM. Role of non-covalent interactions in deciding the fate of product formation in bifunctional thiourea-assisted chiral organic reactions. Theor Chem Acc 2022. [DOI: 10.1007/s00214-022-02902-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/16/2022]
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4
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Tang Y, Liu K, Wu Y, Zhou S, Cheng T, Liu G. Single‐Operation Decarboxylative Mannich Reaction/Asymmetric Transfer Hydrogenation Cascade Process Directly Accesses 1,3‐Distereocentered β‐Sulfonamido Alcohols. Adv Synth Catal 2022. [DOI: 10.1002/adsc.202101418] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Yong Tang
- Shanghai Normal University - Xuhui Campus CHINA
| | - Kaihong Liu
- Shanghai Normal University - Xuhui Campus CHINA
| | - Ye Wu
- Shanghai Normal University - Xuhui Campus CHINA
| | - Siyu Zhou
- Shanghai Normal University - Xuhui Campus CHINA
| | | | - Guohua Liu
- Shanghai Normal University - Xuhui Campus CHINA
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5
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Przydacz A, Topolska A, Skrzyńska A, Albrecht Ł. NHC‐catalyzed 1,4‐elimination in the dearomative activation of 3‐furaldehydes towards (4+2)‐cycloadditions. Adv Synth Catal 2022. [DOI: 10.1002/adsc.202101338] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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6
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Xavier T, Condon S, Pichon C, Le Gall E, Presset M. Substituted Malonic Acid Half Oxyesters (SMAHOs): Greener Nucleophiles for Organic Synthesis. European J Org Chem 2022. [DOI: 10.1002/ejoc.202101392] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Tania Xavier
- ICMPE: Institut de Chimie et des Materiaux Paris-Est C3M FRANCE
| | - Sylvie Condon
- ICMPE: Institut de Chimie et des Materiaux Paris-Est C3M FRANCE
| | | | - Erwan Le Gall
- ICMPE: Institut de Chimie et des Materiaux Paris-Est C3M FRANCE
| | - Marc Presset
- Institut de Chimie et des Materiaux Paris-Est C3M 2-8 Rue Henri Dunant94320 94320 Thiais FRANCE
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7
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Caballero-García G, Goodman JM. N-Triflylphosphoramides: highly acidic catalysts for asymmetric transformations. Org Biomol Chem 2021; 19:9565-9618. [PMID: 34723293 DOI: 10.1039/d1ob01708j] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Abstract
N-Triflylphosphoramides (NTPA), have become increasingly popular catalysts in the development of enantioselective transformations as they are stronger Brønsted acids than the corresponding phosphoric acids (PA). Their highly acidic, asymmetric active site can activate difficult, unreactive substrates. In this review, we present an account of asymmetric transformations using this type of catalyst that have been reported in the past ten years and we classify these reactions using the enantio-determining step as the key criterion. This compendium of NTPA-catalysed reactions is organised into the following categories: (1) cycloadditions, (2) electrocyclisations, polyene and related cyclisations, (3) addition reactions to imines, (4) electrophilic aromatic substitutions, (5) addition reactions to carbocations, (6) aldol and related reactions, (7) addition reactions to double bonds, and (8) rearrangements and desymmetrisations. We highlight the use of NTPA in total synthesis and suggest mnemonics which account for their enantioselectivity.
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Affiliation(s)
| | - Jonathan M Goodman
- Yusuf Hamied Department of Chemistry, University of Cambridge, Lensfield Road, CB2 1EW, Cambridge, UK.
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8
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Qin W, Subhani M, Jiang C, Lu H. β-Keto acids in asymmetric metal catalysis and organocatalysis. Org Biomol Chem 2021; 19:10030-10046. [PMID: 34747960 DOI: 10.1039/d1ob01481a] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
β-Keto acids, ideal surrogates of inactive ketones, play an important role in organic synthesis. The asymmetric decarboxylative reaction using β-keto acids is the one which is being studied the most. Herein we present a comprehensive review on this research topic, which is generally classified according to different catalytic systems and chiral induction modes. Additionally, some extended utilities of these methodologies for synthesizing bioactive compounds were also summarized. This review will facilitate the synthetic community to understand the role of β-keto acids in asymmetric reactions, providing many new opportunities for further exploration in this field.
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Affiliation(s)
- Wei Qin
- School of Environmental and Chemical Engineering, Jiangsu University of Science and Technology, Zhenjiang, Jiangsu 212100, China.
| | - Mahboob Subhani
- School of Environmental and Chemical Engineering, Jiangsu University of Science and Technology, Zhenjiang, Jiangsu 212100, China.
| | - Chunhui Jiang
- School of Environmental and Chemical Engineering, Jiangsu University of Science and Technology, Zhenjiang, Jiangsu 212100, China.
| | - Hongfei Lu
- School of Environmental and Chemical Engineering, Jiangsu University of Science and Technology, Zhenjiang, Jiangsu 212100, China.
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9
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Wang N, Wu Z, Wang J, Ullah N, Lu Y. Recent applications of asymmetric organocatalytic annulation reactions in natural product synthesis. Chem Soc Rev 2021; 50:9766-9793. [PMID: 34286704 DOI: 10.1039/d0cs01124j] [Citation(s) in RCA: 15] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
Abstract
The past two decades have witnessed remarkable growth of asymmetric organocatalysis, which is now a firmly established synthetic tool, serving as a powerful platform for the production of chiral molecules. Ring structures are ubiquitous in organic compounds, and, in the context of natural product synthesis, strategic construction of ring motifs is often crucial, fundamentally impacting the eventual fate of the whole synthetic plan. In this review, we provide a comprehensive and updated summary of asymmetric organocatalytic annulation reactions; in particular, the application of these annulation strategies in natural product synthesis will be highlighted.
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Affiliation(s)
- Nengzhong Wang
- Department of Chemistry, National University of Singapore, 3 Science Drive 3, 117543, Singapore.
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10
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Xavier T, Condon S, Pichon C, Le Gall E, Presset M. Decarboxylative Mannich Reactions with Substituted Malonic Acid Half-Oxyesters. J Org Chem 2021; 86:5452-5462. [PMID: 33822615 DOI: 10.1021/acs.joc.0c02895] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
The decarboxylative Mannich reaction between imines and substituted malonic acids half-oxyesters (SMAHOs) has been developed using 1,4-diazabicyclo[2.2.2]octane (DABCO) as an organocatalyst. The reaction proceeds under simple reaction conditions and tolerates a broad range of substrates, affording general access to β2,3-aminoesters, the syn diastereomer being the major one. An alternative multicomponent protocol has also been developed to increase the overall eco-compatibility of the process.
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Affiliation(s)
- Tania Xavier
- ICMPE, Université Paris Est Créteil, CNRS, ICMPE, UMR7182, 2 rue Henri Dunant, F-94320 Thiais, France
| | - Sylvie Condon
- ICMPE, Université Paris Est Créteil, CNRS, ICMPE, UMR7182, 2 rue Henri Dunant, F-94320 Thiais, France
| | - Christophe Pichon
- ICMPE, Université Paris Est Créteil, CNRS, ICMPE, UMR7182, 2 rue Henri Dunant, F-94320 Thiais, France
| | - Erwan Le Gall
- ICMPE, Université Paris Est Créteil, CNRS, ICMPE, UMR7182, 2 rue Henri Dunant, F-94320 Thiais, France
| | - Marc Presset
- ICMPE, Université Paris Est Créteil, CNRS, ICMPE, UMR7182, 2 rue Henri Dunant, F-94320 Thiais, France
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11
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Petroselli M, Rebek J, Yu Y. Highly Selective Radical Monoreduction of Dihalides Confined to a Dynamic Supramolecular Host. Chemistry 2021; 27:3284-3287. [PMID: 33301606 DOI: 10.1002/chem.202004953] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/13/2020] [Revised: 12/03/2020] [Indexed: 12/26/2022]
Abstract
Reduction of alkyl dihalide guests (2-5 and 7) with trialkylsilanes (R3 SiH) was performed in water-soluble host 1 to investigate the effects of confinement on fast radical reactions (k≥103 m-1 s-1 ). High selectivity (>95 %) for mono-reduced products was observed for primary and secondary dihalide guests under mild conditions. The results highlight the importance of host-guest complexation rates to modulate the product selectivity in radical reactions.
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Affiliation(s)
- Manuel Petroselli
- Center for Supramolecular Chemistry & Catalysis and Department of Chemistry, College of Science, Shanghai University, 99 Shang-Da Road, Shanghai, 200444, P. R. China
| | - Julius Rebek
- The Skaggs Institute for Chemical Biology and Department of Chemistry, The Scripps Research Institute for Chemical Biology and Department of Chemistry, 10550 North Torrey Pines Road, La Jolla, California, 92037, USA
| | - Yang Yu
- Center for Supramolecular Chemistry & Catalysis and Department of Chemistry, College of Science, Shanghai University, 99 Shang-Da Road, Shanghai, 200444, P. R. China
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12
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Guan R, Hsu C, Han J. Trifluoroethanol‐mediated Decarboxylative Addition Reactions of β‐Ketoacids with Diverse Electrophiles. ASIAN J ORG CHEM 2020. [DOI: 10.1002/ajoc.202000553] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Affiliation(s)
- Ren‐You Guan
- Department of Chemistry National Chung Hsing University 145 Xingda Rd., South Dist. Taichung City 402 Taiwan R.O.C
| | - Chan‐Wei Hsu
- Department of Chemistry Chung Yuan Christian University 200 Chung Pei Road, Chung Li District Taoyuan City 32023 Taiwan R.O.C
| | - Jeng‐Liang Han
- Department of Chemistry National Chung Hsing University 145 Xingda Rd., South Dist. Taichung City 402 Taiwan R.O.C
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13
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Wang R, Marichev KO, Dong K, Jensen JA, Doyle MP. Chiral 3-Acylglutaric Acid Derivatives from Strain-Induced Nucleophilic Retro-Claisen Ring-Opening Reactions. J Org Chem 2020; 85:9475-9490. [PMID: 32674577 DOI: 10.1021/acs.joc.0c01176] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
A nucleophilic retro-Claisen ring-opening of donor-acceptor cyclobutenes, formed with high stereocontrol by [3 + 1]-cycloaddition of TIPS-protected enoldiazoacetates with α-acyl sulfur ylides, has been developed. Removal of the TIPS group to form the isolable β-keto ester precedes the strain-induced ring-opening. Various amines, alcohols, thiols, and amino acid derivatives are effective nucleophiles, and their products are formed in very high yields via stoichiometric reactions. The chirality of the reactant donor-acceptor cyclobutenes is fully retained in the ring-opening reactions. The 3-acylglutaric acid products are converted to various valuable structures, including amido-diols, γ-aminobutyric acid (GABA) derivatives, and heterocycles.
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Affiliation(s)
- Rui Wang
- Department of Chemistry, The University of Texas at San Antonio, San Antonio, Texas 78249, United States
| | - Kostiantyn O Marichev
- Department of Chemistry, The University of Texas at San Antonio, San Antonio, Texas 78249, United States
| | - Kuiyong Dong
- Department of Chemistry, The University of Texas at San Antonio, San Antonio, Texas 78249, United States
| | - Joseph A Jensen
- Department of Chemistry, The University of Texas at San Antonio, San Antonio, Texas 78249, United States
| | - Michael P Doyle
- Department of Chemistry, The University of Texas at San Antonio, San Antonio, Texas 78249, United States
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14
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Crean RM, Gardner JM, Kamerlin SCL. Harnessing Conformational Plasticity to Generate Designer Enzymes. J Am Chem Soc 2020; 142:11324-11342. [PMID: 32496764 PMCID: PMC7467679 DOI: 10.1021/jacs.0c04924] [Citation(s) in RCA: 64] [Impact Index Per Article: 16.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/05/2020] [Indexed: 02/08/2023]
Abstract
Recent years have witnessed an explosion of interest in understanding the role of conformational dynamics both in the evolution of new enzymatic activities from existing enzymes and in facilitating the emergence of enzymatic activity de novo on scaffolds that were previously non-catalytic. There are also an increasing number of examples in the literature of targeted engineering of conformational dynamics being successfully used to alter enzyme selectivity and activity. Despite the obvious importance of conformational dynamics to both enzyme function and evolvability, many (although not all) computational design approaches still focus either on pure sequence-based approaches or on using structures with limited flexibility to guide the design. However, there exist a wide variety of computational approaches that can be (re)purposed to introduce conformational dynamics as a key consideration in the design process. Coupled with laboratory evolution and more conventional existing sequence- and structure-based approaches, these techniques provide powerful tools for greatly expanding the protein engineering toolkit. This Perspective provides an overview of evolutionary studies that have dissected the role of conformational dynamics in facilitating the emergence of novel enzymes, as well as advances in computational approaches that allow one to target conformational dynamics as part of enzyme design. Harnessing conformational dynamics in engineering studies is a powerful paradigm with which to engineer the next generation of designer biocatalysts.
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Affiliation(s)
- Rory M. Crean
- Department of Chemistry -
BMC, Uppsala University, Box 576, 751 23 Uppsala, Sweden
| | - Jasmine M. Gardner
- Department of Chemistry -
BMC, Uppsala University, Box 576, 751 23 Uppsala, Sweden
| | - Shina C. L. Kamerlin
- Department of Chemistry -
BMC, Uppsala University, Box 576, 751 23 Uppsala, Sweden
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15
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Bertuzzi G, Silvestrini F, Moimare P, Pecorari D, Mazzanti A, Bernardi L, Fochi M. Chemodivergent Preparation of Various Heterocycles
via
Phase‐Transfer Catalysis: Enantioselective Synthesis of Functionalized Piperidines. Adv Synth Catal 2020. [DOI: 10.1002/adsc.201901500] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Affiliation(s)
- Giulio Bertuzzi
- Department of Industrial Chemistry “Toso Montanari” & INSTM RU BolognaAlma Mater Studiorum University of Bologna V. Risorgimento 4 40136 Bologna Italy
| | - Filippo Silvestrini
- Department of Industrial Chemistry “Toso Montanari” & INSTM RU BolognaAlma Mater Studiorum University of Bologna V. Risorgimento 4 40136 Bologna Italy
| | - Pierluigi Moimare
- Department of Industrial Chemistry “Toso Montanari” & INSTM RU BolognaAlma Mater Studiorum University of Bologna V. Risorgimento 4 40136 Bologna Italy
| | - Daniel Pecorari
- Department of Industrial Chemistry “Toso Montanari” & INSTM RU BolognaAlma Mater Studiorum University of Bologna V. Risorgimento 4 40136 Bologna Italy
| | - Andrea Mazzanti
- Department of Industrial Chemistry “Toso Montanari” & INSTM RU BolognaAlma Mater Studiorum University of Bologna V. Risorgimento 4 40136 Bologna Italy
| | - Luca Bernardi
- Department of Industrial Chemistry “Toso Montanari” & INSTM RU BolognaAlma Mater Studiorum University of Bologna V. Risorgimento 4 40136 Bologna Italy
| | - Mariafrancesca Fochi
- Department of Industrial Chemistry “Toso Montanari” & INSTM RU BolognaAlma Mater Studiorum University of Bologna V. Risorgimento 4 40136 Bologna Italy
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16
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Zhang HQ, Xi JM, Liao WW. Organocatalytic Isomerization/Allylic Alkylation of O-Acylated Hemithioacetals and Their Application in Tandem Sequence to Access 2,7-Dioxabicyclo[2.2.1]heptan-3-one Derivatives. J Org Chem 2020; 85:1168-1180. [PMID: 31878775 DOI: 10.1021/acs.joc.9b03172] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
Abstract
A novel protocol for the efficient preparation of α-hydroxy allylic thioesters via a Lewis base-catalyzed tandem isomerization/allylic alkylation process is reported. The resulting allylic thioesters can serve as valuable scaffolds to undergo a stereoselective intramolecular cyclization to deliver 2,7-dioxabicyclo[2.2.1]heptan-3-one derivatives in a catalytically atom-economic fashion.
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Affiliation(s)
- Huan-Qing Zhang
- Department of Organic Chemistry, College of Chemistry , Jilin University , 2699 Qianjin Street , Changchun 130012 , China
| | - Ji-Ming Xi
- Department of Organic Chemistry, College of Chemistry , Jilin University , 2699 Qianjin Street , Changchun 130012 , China
| | - Wei-Wei Liao
- Department of Organic Chemistry, College of Chemistry , Jilin University , 2699 Qianjin Street , Changchun 130012 , China
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17
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Xu K, Chen W, Chen X, Wang B, Huang J, Tian X. Organocatalytic asymmetric Friedel–Crafts alkylation/hemiketalization/lactonization cascade reactions: highly enantioselective synthesis of furo[2,3-b]benzofuranones. Org Chem Front 2020. [DOI: 10.1039/d0qo00475h] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Abstract
A highly diastereo- and enantioselective organocatalytic Friedel–Crafts alkylation/hemiketalization/lactonization cascade reaction generating furo[2,3-b]benzofuranones in good to excellent yields with high stereoselectivities.
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Affiliation(s)
- Kunhua Xu
- Key Laboratory of Molecular Target & Clinical Pharmacology and the State Key Laboratory of Respiratory Disease
- School of Pharmaceutical Sciences & The Fifth Affiliated Hospital
- Guangzhou Medical University
- Guangzhou
- China
| | - Wenming Chen
- Department of Pharmaceutical Production Center
- The First Affiliated Hospital of Hunan University of Chinese Medicine
- Changsha
- China
| | - Xu Chen
- Key Laboratory of Molecular Target & Clinical Pharmacology and the State Key Laboratory of Respiratory Disease
- School of Pharmaceutical Sciences & The Fifth Affiliated Hospital
- Guangzhou Medical University
- Guangzhou
- China
| | - Biao Wang
- Key Laboratory of Molecular Target & Clinical Pharmacology and the State Key Laboratory of Respiratory Disease
- School of Pharmaceutical Sciences & The Fifth Affiliated Hospital
- Guangzhou Medical University
- Guangzhou
- China
| | - Jun Huang
- Sino-French Hoffmann Institute
- Guangdong Provincial Key Laboratory of Allergy & Clinical Immunology
- The Second Affiliated Hospital
- Guangzhou Medical University
- Guangzhou
| | - Xu Tian
- Key Laboratory of Molecular Target & Clinical Pharmacology and the State Key Laboratory of Respiratory Disease
- School of Pharmaceutical Sciences & The Fifth Affiliated Hospital
- Guangzhou Medical University
- Guangzhou
- China
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18
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Chahal MK, Payne DT, Matsushita Y, Labuta J, Ariga K, Hill JP. Molecular Engineering of β‐Substituted Oxoporphyrinogens for Hydrogen‐Bond Donor Catalysis. European J Org Chem 2019. [DOI: 10.1002/ejoc.201901706] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Mandeep K. Chahal
- International Center for Materials Nanoarchitectonics (MANA) National Institute for Materials Science (NIMS) Namiki 1‐1, Tsukuba 305‐0044 Ibaraki Japan
| | - Daniel T. Payne
- International Center for Materials Nanoarchitectonics (MANA) National Institute for Materials Science (NIMS) Namiki 1‐1, Tsukuba 305‐0044 Ibaraki Japan
| | - Yoshitaka Matsushita
- Research Network and Facility Services Division National Institute for Materials Science (NIMS) 1‐2–1 Sengen, Tsukuba 305‐0047 Ibaraki Japan
| | - Jan Labuta
- International Center for Materials Nanoarchitectonics (MANA) National Institute for Materials Science (NIMS) Namiki 1‐1, Tsukuba 305‐0044 Ibaraki Japan
| | - Katsuhiko Ariga
- International Center for Materials Nanoarchitectonics (MANA) National Institute for Materials Science (NIMS) Namiki 1‐1, Tsukuba 305‐0044 Ibaraki Japan
- Department of Advanced Materials Science Graduate School of Frontier Sciences The University of Tokyo 5‐1–5 Kashiwanoha, Kashiwa 277‐8561 Chiba Japan
| | - Jonathan P. Hill
- International Center for Materials Nanoarchitectonics (MANA) National Institute for Materials Science (NIMS) Namiki 1‐1, Tsukuba 305‐0044 Ibaraki Japan
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19
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Kawanishi R, Hattori S, Iwasa S, Shibatomi K. Amine-Catalyzed Decarboxylative Aldol Reaction of β-Ketocarboxylic Acids with Trifluoropyruvates. Molecules 2019; 24:E2773. [PMID: 31366138 PMCID: PMC6695914 DOI: 10.3390/molecules24152773] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/04/2019] [Revised: 07/19/2019] [Accepted: 07/25/2019] [Indexed: 11/16/2022] Open
Abstract
Decarboxylative aldol reaction of aliphatic carboxylic acids is a useful method for C-C bond formation because carboxylic acids are an easily available class of compounds. In this study, we found that the decarboxylative aldol reaction of tertiary β-ketocarboxylic acids and trifluoropyruvates proceeded smoothly to yield the corresponding aldol products in high yields and with high diastereoselectivity in the presence of a tertiary amine catalyst. In this reaction, we efficiently constructed a quaternary carbon center and an adjacent trifluoromethylated carbon center. This protocol was also extended to an enantioselective reaction with a chiral amine catalyst, and the desired product was obtained with up to 73% enantioselectivity.
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Affiliation(s)
- Ryouta Kawanishi
- Department of Applied Chemistry and Life Science, Toyohashi University of Technology, 1-1 Hibarigaoka, Tempaku-cho, Toyohashi 441-8580, Japan
| | - Shinya Hattori
- Department of Applied Chemistry and Life Science, Toyohashi University of Technology, 1-1 Hibarigaoka, Tempaku-cho, Toyohashi 441-8580, Japan
| | - Seiji Iwasa
- Department of Applied Chemistry and Life Science, Toyohashi University of Technology, 1-1 Hibarigaoka, Tempaku-cho, Toyohashi 441-8580, Japan
| | - Kazutaka Shibatomi
- Department of Applied Chemistry and Life Science, Toyohashi University of Technology, 1-1 Hibarigaoka, Tempaku-cho, Toyohashi 441-8580, Japan.
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20
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Park JH, Sim JH, Song CE. Direct Access to β-Trifluoromethyl-β-hydroxy Thioesters by Biomimetic Organocatalytic Enantioselective Aldol Reaction. Org Lett 2019; 21:4567-4570. [PMID: 31184184 DOI: 10.1021/acs.orglett.9b01469] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
A broadly applicable biomimetic enantioselective decarboxylative catalytic aldol reaction of trifluoromethyl ketones with malonic acid half-thioesters (MAHTs) is described. Utilizing cinchona-based thioureas as highly efficient polyketide synthase-mimic catalysts, chiral tertiary aldols, β-trifluoromethyl-β-hydroxy thioesters, were obtained in up to 99% yield and 95% ee. Facile transformation of the thioester moiety of the aldol adducts showcases the synthetic utility of this biomimetic aldol protocol to deliver a range of chiral trifluoromethylated tertiary aldol pharmacophores.
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Affiliation(s)
- Jin Hyun Park
- Department of Chemistry , Sungkyunkwan University , Suwon 16419 , Korea
| | - Jae Hun Sim
- Department of Chemistry , Sungkyunkwan University , Suwon 16419 , Korea
| | - Choong Eui Song
- Department of Chemistry , Sungkyunkwan University , Suwon 16419 , Korea
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21
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Kawanishi R, Phongphane L, Iwasa S, Shibatomi K. Decarboxylative Fluorination of 2‐Pyridylacetates. Chemistry 2019; 25:7453-7456. [DOI: 10.1002/chem.201900565] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/05/2019] [Revised: 04/01/2019] [Indexed: 11/05/2022]
Affiliation(s)
- Ryouta Kawanishi
- Department of Applied Chemistry and Life ScienceToyohashi University of Technology 1-1 Hibarigaoka, Tempaku-cho Toyohashi 441-8580 Japan
| | - Lacksany Phongphane
- Department of Applied Chemistry and Life ScienceToyohashi University of Technology 1-1 Hibarigaoka, Tempaku-cho Toyohashi 441-8580 Japan
| | - Seiji Iwasa
- Department of Applied Chemistry and Life ScienceToyohashi University of Technology 1-1 Hibarigaoka, Tempaku-cho Toyohashi 441-8580 Japan
| | - Kazutaka Shibatomi
- Department of Applied Chemistry and Life ScienceToyohashi University of Technology 1-1 Hibarigaoka, Tempaku-cho Toyohashi 441-8580 Japan
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22
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Featherston AL, Shugrue CR, Mercado BQ, Miller SJ. Phosphothreonine (pThr)-Based Multifunctional Peptide Catalysis for Asymmetric Baeyer-Villiger Oxidations of Cyclobutanones. ACS Catal 2019; 9:242-252. [PMID: 31007966 DOI: 10.1021/acscatal.8b04132] [Citation(s) in RCA: 29] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
Biologically inspired phosphothreonine (pThr)-embedded peptides that function as chiral Brønsted acid catalysts for enantioselective Baeyer-Villiger oxidations (BV) of cyclobutanones with aqueous H2O2 are reported herein. Complementary to traditional BINOL-derived chiral phosphoric acids (CPAs), the functional diversity of the peptidic scaffold provides the opportunity for multiple points of contact with substrates via hydrogen bonding, and the ease of peptide synthesis facilitates rapid diversification of the catalyst structure, such that numerous unique peptide-based CPA catalysts have been prepared. Utilizing a hypothesis-driven design, we identified a pThr-based catalyst that contains an N-acylated diaminopropionic acid (Dap) residue, which achieves high enantioselectivity with catalyst loadings as low as 0.5 mol%. The power of peptide-based multi-site binding is further exemplified through reversal in the absolute stereochemical outcome upon repositioning of the substrate-directing group (ortho- to meta). Modifications to the i+3 residue (LDap to LPhe) lead to an observed enantiodivergence without inversion of any stereogenic center on the peptide catalyst, due to noncovalent interactions. Structure-selectivity and 1H-1H-ROESY studies revealed that the proposed hydrogen bonding interactions are essential for high levels of enantioinduction. The ability for the phosphopeptides to operate as multifunctional oxidation catalysts expands the scope of pThr catalysts and provides a framework for the future selective diversification of more complex substrates, including natural products.
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Affiliation(s)
- Aaron L. Featherston
- Department of Chemistry, Yale University, P.O. Box 208107, New Haven, Connecticut 06520-8107, United States
| | - Christopher R. Shugrue
- Department of Chemistry, Yale University, P.O. Box 208107, New Haven, Connecticut 06520-8107, United States
| | - Brandon Q. Mercado
- Department of Chemistry, Yale University, P.O. Box 208107, New Haven, Connecticut 06520-8107, United States
| | - Scott J. Miller
- Department of Chemistry, Yale University, P.O. Box 208107, New Haven, Connecticut 06520-8107, United States
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23
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Chen K, Wu CD. Designed fabrication of biomimetic metal–organic frameworks for catalytic applications. Coord Chem Rev 2019. [DOI: 10.1016/j.ccr.2018.01.016] [Citation(s) in RCA: 98] [Impact Index Per Article: 19.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
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24
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Zheng ZJ, Yu TY, Xu PF, Wei H. (Diacetoxyiodo)benzene-mediated Selective Synthesis of α-Azido Ketones or Acyl Azides from β-Keto Acids. ASIAN J ORG CHEM 2018. [DOI: 10.1002/ajoc.201800319] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Zhao-Jing Zheng
- State Key Laboratory of Applied Organic Chemistry College of Chemistry and Chemical Engineering; Lanzhou University; Lanzhou 730000 China
| | - Tian-Yang Yu
- Key Laboratory of Synthetic and Natural Functional Molecular Chemistry of the Ministry of Education; College of Chemistry & Materials Science; Northwest University; Xi'an 710127 China
| | - Peng-Fei Xu
- State Key Laboratory of Applied Organic Chemistry College of Chemistry and Chemical Engineering; Lanzhou University; Lanzhou 730000 China
| | - Hao Wei
- Key Laboratory of Synthetic and Natural Functional Molecular Chemistry of the Ministry of Education; College of Chemistry & Materials Science; Northwest University; Xi'an 710127 China
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25
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Liu YJ, Li JS, Nie J, Ma JA. Organocatalytic Asymmetric Decarboxylative Mannich Reaction of β-Keto Acids with Cyclic α-Ketiminophosphonates: Access to Quaternary α-Aminophosphonates. Org Lett 2018; 20:3643-3646. [PMID: 29847943 DOI: 10.1021/acs.orglett.8b01422] [Citation(s) in RCA: 47] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
An organocatalytic asymmetric decarboxylative Mannich reaction of β-keto acids with cyclic α-ketiminophosphonates has been developed. By using saccharide-derived bifunctional amine-thiourea catalysts bearing an axial chiral binaphthyl scaffold, a wide range of quaternary α-amino-γ-oxophosphonates were obtained in up to 93% yield and >99% ee. Furthermore, two interesting α-aminophosphonate derivatives were synthesized from the corresponding decarboxylative Mannich product via simple transformations.
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Affiliation(s)
- Yong-Jie Liu
- Department of Chemistry, Tianjin Key Laboratory of Molecular Optoelectronic Sciences, and Tianjin Collaborative Innovation Center of Chemical Science & Engineering , Tianjin University , Tianjin 300072 , P. R. China
| | - Jin-Shan Li
- Department of Chemistry, Tianjin Key Laboratory of Molecular Optoelectronic Sciences, and Tianjin Collaborative Innovation Center of Chemical Science & Engineering , Tianjin University , Tianjin 300072 , P. R. China
| | - Jing Nie
- Department of Chemistry, Tianjin Key Laboratory of Molecular Optoelectronic Sciences, and Tianjin Collaborative Innovation Center of Chemical Science & Engineering , Tianjin University , Tianjin 300072 , P. R. China
| | - Jun-An Ma
- Department of Chemistry, Tianjin Key Laboratory of Molecular Optoelectronic Sciences, and Tianjin Collaborative Innovation Center of Chemical Science & Engineering , Tianjin University , Tianjin 300072 , P. R. China
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26
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Li JL, Fu L, Wu J, Yang KC, Li QZ, Gou XJ, Peng C, Han B, Shen XD. Highly enantioselective synthesis of fused bicyclic dihydropyranones via low-loading N-heterocyclic carbene organocatalysis. Chem Commun (Camb) 2018; 53:6875-6878. [PMID: 28604911 DOI: 10.1039/c7cc02921g] [Citation(s) in RCA: 46] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Highly diastereo and enantioselective [4+2] cycloadditions have been achieved between pyrrolidone-derived cyclic enones and α-haloaldehydes under mild conditions. Relying on extremely reactive in-situ generated chiral N-heterocyclic carbenes, this stereoselective annulation proceeds efficiently even on the gram scale with the catalyst loading as low as 0.025 mol% (250 ppm). A variety of cis-substituted bicyclic dihydropyranones can be produced in up to 96% yield with up to >99% ee. In addition, simple, inexpensive linear aldehydes such as n-propanal can be used directly in asymmetric cycloadditions via oxidative N-heterocyclic carbene organocatalysis with low catalyst loading. This method may provide an economical and practical approach for the asymmetric synthesis of medicinally relevant molecules.
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Affiliation(s)
- Jun-Long Li
- Antibiotics Research and Re-evaluation Key Laboratory of Sichuan Province, Sichuan Industrial Institute of Antibiotics, Chengdu University, Chengdu 610052, P. R. China.
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27
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Han MY, Pan H, Lin J, Li W, Li P, Wang L. A catalyst-controlled switchable reaction of β-keto acids to silyl glyoxylates. Org Biomol Chem 2018; 16:4117-4126. [DOI: 10.1039/c8ob00740c] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
A catalyst-controlled switchable reaction of β-keto acids to silyl glyoxylates was developed and the decarboxylative-addition products were generated by using a thiourea catalyst.
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Affiliation(s)
- Man-Yi Han
- Department of Chemistry
- Huaibei Normal University
- Huaibei
- P.R. China
| | - Hong Pan
- Department of Chemistry
- Huaibei Normal University
- Huaibei
- P.R. China
| | - Jing Lin
- Department of Chemistry
- Huaibei Normal University
- Huaibei
- P.R. China
| | - Wei Li
- Department of Chemistry
- Huaibei Normal University
- Huaibei
- P.R. China
| | - Pinhua Li
- Department of Chemistry
- Huaibei Normal University
- Huaibei
- P.R. China
| | - Lei Wang
- Department of Chemistry
- Huaibei Normal University
- Huaibei
- P.R. China
- State Key Laboratory of Organometallic Chemistry
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28
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Melnykov SV, Pataman AS, Dmytriv YV, Shishkina SV, Vovk MV, Sukach VA. Regioselective decarboxylative addition of malonic acid and its mono(thio)esters to 4-trifluoromethylpyrimidin-2(1 H)-ones. Beilstein J Org Chem 2017; 13:2617-2625. [PMID: 29259672 PMCID: PMC5727768 DOI: 10.3762/bjoc.13.259] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/03/2017] [Accepted: 11/20/2017] [Indexed: 01/07/2023] Open
Abstract
Background: Due to the high reactivity towards various C-nucleophiles, trifluoromethylketimines are known to be useful reagents for the synthesis of α-trifluoromethylated amine derivatives. However, decarboxylative reactions with malonic acid and its mono(thio)esters have been poorly investigated so far despite the potential to become a convenient route to β-trifluoromethyl-β-amino acid derivatives and to their partially saturated heterocyclic analogues. Results: In this paper we show that 4-trifluoromethylpyrimidin-2(1H)-ones, unique heterocyclic ketimines, react with malonic acid under organic base catalysis to regioselectively provide either Michael- or Mannich-type decarboxylative addition products depending on solvent polarity. Malonic mono(thio)esters give exclusively Michael-type products. The two regioisomeric products can be converted into saturated (2-oxohexahydropyrimidin-4-yl)acetic acid derivatives by mild hydrogenation of the endocyclic C=C double bond in the presence of Pd/C as catalyst. The cis-stereoisomers selectively formed upon reduction of the Michael-type products were structurally determined by X-ray diffraction. As a result of this study, a number of novel acetic acid derivatives containing trifluoromethylated, partially or fully saturated 2-oxopyrimidine cores were prepared and characterized as promising building blocks. Conclusions: Regio- and stereoselective protocols have been developed for the synthesis of novel isomeric 4(6)-trifluoromethylated 1,2,3,4-tetrahydro- and perhydro-(2-oxopyrimidin-4-yl)acetic acid derivatives.
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Affiliation(s)
- Sergii V Melnykov
- Institute of Organic Chemistry, National Academy of Sciences of Ukraine, 5 Murmanska str., Kyiv 02660, Ukraine
| | | | - Yurii V Dmytriv
- Enamine LTD, 78 Chervonotkats'ka str., Kyiv 02094, Ukraine.,National Technical University of Ukraine "Igor Sikorsky Kyiv Polytechnic Institute", 37 Peremohy ave., Kyiv 03056, Ukraine
| | - Svitlana V Shishkina
- STC ''Institute for Single Crystals'', National Academy of Sciences of Ukraine, 60 Nauky ave., Kharkiv 61001, Ukraine.,Department of Inorganic Chemisrtry, V.M. Karasin Kharkiv National University, 4 Svobody sq, Kharkiv 61122, Ukraine
| | - Mykhailo V Vovk
- Institute of Organic Chemistry, National Academy of Sciences of Ukraine, 5 Murmanska str., Kyiv 02660, Ukraine
| | - Volodymyr A Sukach
- Institute of Organic Chemistry, National Academy of Sciences of Ukraine, 5 Murmanska str., Kyiv 02660, Ukraine
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29
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Lohans CT, Wang DY, Wang J, Hamed RB, Schofield CJ. Crotonases: Nature’s Exceedingly Convertible Catalysts. ACS Catal 2017. [DOI: 10.1021/acscatal.7b01699] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
Affiliation(s)
- Christopher T. Lohans
- Chemistry
Research Laboratory, Department of Chemistry, University of Oxford, Oxford OX1 3TA, United Kingdom
| | - David Y. Wang
- Chemistry
Research Laboratory, Department of Chemistry, University of Oxford, Oxford OX1 3TA, United Kingdom
| | - Jimmy Wang
- Chemistry
Research Laboratory, Department of Chemistry, University of Oxford, Oxford OX1 3TA, United Kingdom
| | - Refaat B. Hamed
- Department
of Pharmacognosy, Faculty of Pharmacy, Assiut University, Assiut 71526, Egypt
| | - Christopher J. Schofield
- Chemistry
Research Laboratory, Department of Chemistry, University of Oxford, Oxford OX1 3TA, United Kingdom
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30
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Parmar D, Sugiono E, Raja S, Rueping M. Addition and Correction to Complete Field Guide to Asymmetric BINOL-Phosphate Derived Brønsted Acid and Metal Catalysis: History and Classification by Mode of Activation; Brønsted Acidity, Hydrogen Bonding, Ion Pairing, and Metal Phosphates. Chem Rev 2017; 117:10608-10620. [DOI: 10.1021/acs.chemrev.7b00197] [Citation(s) in RCA: 107] [Impact Index Per Article: 15.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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31
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Xu X, Chen H, He J, Xu H. Copper-Catalysed Decarboxylative Trifluoromethylation of β
-Ketoacids. CHINESE J CHEM 2017. [DOI: 10.1002/cjoc.201700271] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Xiaolan Xu
- School of Chemistry and Chemical Engineering; Hefei University of Technology; Hefei Anhui 230009 China
- School of Medical Science; Anhui Medical University; Hefei Anhui 230009 China
| | - Huanhuan Chen
- School of Chemistry and Chemical Engineering; Hefei University of Technology; Hefei Anhui 230009 China
| | - Jianbo He
- School of Chemistry and Chemical Engineering; Hefei University of Technology; Hefei Anhui 230009 China
| | - Huajian Xu
- School of Chemistry and Chemical Engineering; Hefei University of Technology; Hefei Anhui 230009 China
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32
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Wei Y, Zhang HX, Zeng JL, Nie J, Ma JA. Organocatalytic Asymmetric Decarboxylative Amination of β-Keto Acids: Access to Optically Active α-Amino Ketones and 1,2-Amino Alcohols. Org Lett 2017; 19:2162-2165. [PMID: 28406311 DOI: 10.1021/acs.orglett.7b00797] [Citation(s) in RCA: 31] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
An organocatalytic asymmetric decarboxylative amination reaction of β-keto acids is described. Under mild reaction conditions, a series of chiral α-amino ketones were obtained in good to high yields (up to 99%) and enantioselectivities (up to 95% ee). A chiral 1,2-amino alcohol was synthesized from the corresponding decarboxylative amination product in several steps without loss of enantioselectivity.
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Affiliation(s)
- Yi Wei
- Department of Chemistry, Tianjin Key Laboratory of Molecular Optoelectronic Sciences, Tianjin University, and Collaborative Innovation Center of Chemical Science and Engineering (Tianjin) , Tianjin 300072, P. R. China
| | - Heng-Xia Zhang
- Department of Chemistry, Tianjin Key Laboratory of Molecular Optoelectronic Sciences, Tianjin University, and Collaborative Innovation Center of Chemical Science and Engineering (Tianjin) , Tianjin 300072, P. R. China
| | - Jun-Liang Zeng
- Department of Chemistry, Tianjin Key Laboratory of Molecular Optoelectronic Sciences, Tianjin University, and Collaborative Innovation Center of Chemical Science and Engineering (Tianjin) , Tianjin 300072, P. R. China
| | - Jing Nie
- Department of Chemistry, Tianjin Key Laboratory of Molecular Optoelectronic Sciences, Tianjin University, and Collaborative Innovation Center of Chemical Science and Engineering (Tianjin) , Tianjin 300072, P. R. China
| | - Jun-An Ma
- Department of Chemistry, Tianjin Key Laboratory of Molecular Optoelectronic Sciences, Tianjin University, and Collaborative Innovation Center of Chemical Science and Engineering (Tianjin) , Tianjin 300072, P. R. China
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33
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Bahamonde A, Murphy JJ, Savarese M, Brémond É, Cavalli A, Melchiorre P. Studies on the Enantioselective Iminium Ion Trapping of Radicals Triggered by an Electron-Relay Mechanism. J Am Chem Soc 2017; 139:4559-4567. [PMID: 28281754 PMCID: PMC5374491 DOI: 10.1021/jacs.7b01446] [Citation(s) in RCA: 45] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Abstract
![]()
A combination of
electrochemical, spectroscopic, computational,
and kinetic studies has been used to elucidate the key mechanistic
aspects of the previously reported enantioselective iminium ion trapping
of photochemically generated carbon-centered radicals. The process,
which provides a direct way to forge quaternary stereocenters with
high fidelity, relies on the interplay of two distinct catalytic cycles:
the aminocatalytic electron-relay system, which triggers the stereoselective
radical trap upon iminium ion formation, and the photoredox cycle,
which generates radicals under mild conditions. Critical to reaction
development was the use of a chiral amine catalyst, bearing a redox-active
carbazole unit, which could rapidly reduce the highly reactive and
unstable intermediate generated upon radical interception. The carbazole
unit, however, is also involved in another step of the electron-relay
mechanism: the transiently generated carbazole radical cation acts
as an oxidant to return the photocatalyst into the original state.
By means of kinetic and spectroscopic studies, we have identified
the last redox event as being the turnover-limiting step of the overall
process. This mechanistic framework is corroborated by the linear
correlation between the reaction rate and the reduction potential
of the carbazole unit tethered to the aminocatalyst. The redox properties
of the carbazole unit can thus be rationally tuned to improve catalytic
activity. This knowledge may open a path for the mechanistically driven
design of the next generation of electron-relay catalysts.
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Affiliation(s)
- Ana Bahamonde
- ICIQ - Institute of Chemical Research of Catalonia, The Barcelona Institute of Science and Technology , Avinguda Països Catalans 16, 43007 Tarragona, Spain
| | - John J Murphy
- ICIQ - Institute of Chemical Research of Catalonia, The Barcelona Institute of Science and Technology , Avinguda Països Catalans 16, 43007 Tarragona, Spain
| | - Marika Savarese
- D3 CompuNet, Istituto Italiano di Tecnologia , via Morego 30, 16163 Genova, Italy
| | - Éric Brémond
- D3 CompuNet, Istituto Italiano di Tecnologia , via Morego 30, 16163 Genova, Italy
| | - Andrea Cavalli
- D3 CompuNet, Istituto Italiano di Tecnologia , via Morego 30, 16163 Genova, Italy.,Dept. of Pharmacy and Biotechnology, via Belmeloro 6, 40126 Bologna, Italy
| | - Paolo Melchiorre
- ICIQ - Institute of Chemical Research of Catalonia, The Barcelona Institute of Science and Technology , Avinguda Països Catalans 16, 43007 Tarragona, Spain.,ICREA , Passeig Lluís Companys 23, 08010 Barcelona, Spain
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34
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Li SW, Gong J, Kang Q. Chiral-at-Metal Rh(III) Complex-Catalyzed Decarboxylative Michael Addition of β-Keto Acids with α,β-Unsaturated 2-Acyl Imidazoles or Pyridine. Org Lett 2017; 19:1350-1353. [PMID: 28245128 DOI: 10.1021/acs.orglett.7b00220] [Citation(s) in RCA: 59] [Impact Index Per Article: 8.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Affiliation(s)
- Shi-Wu Li
- Key Laboratory of Coal to
Ethylene Glycol and Its Related Technology, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, 155 Yangqiao Road West, Fuzhou 350002, China
| | - Jun Gong
- Key Laboratory of Coal to
Ethylene Glycol and Its Related Technology, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, 155 Yangqiao Road West, Fuzhou 350002, China
| | - Qiang Kang
- Key Laboratory of Coal to
Ethylene Glycol and Its Related Technology, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, 155 Yangqiao Road West, Fuzhou 350002, China
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35
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Metrano A, Abascal NC, Mercado BQ, Paulson EK, Hurtley AE, Miller SJ. Diversity of Secondary Structure in Catalytic Peptides with β-Turn-Biased Sequences. J Am Chem Soc 2017; 139:492-516. [PMID: 28029251 PMCID: PMC5312972 DOI: 10.1021/jacs.6b11348] [Citation(s) in RCA: 84] [Impact Index Per Article: 12.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/01/2016] [Indexed: 11/30/2022]
Abstract
X-ray crystallography has been applied to the structural analysis of a series of tetrapeptides that were previously assessed for catalytic activity in an atroposelective bromination reaction. Common to the series is a central Pro-Xaa sequence, where Pro is either l- or d-proline, which was chosen to favor nucleation of canonical β-turn secondary structures. Crystallographic analysis of 35 different peptide sequences revealed a range of conformational states. The observed differences appear not only in cases where the Pro-Xaa loop-region is altered, but also when seemingly subtle alterations to the flanking residues are introduced. In many instances, distinct conformers of the same sequence were observed, either as symmetry-independent molecules within the same unit cell or as polymorphs. Computational studies using DFT provided additional insight into the analysis of solid-state structural features. Select X-ray crystal structures were compared to the corresponding solution structures derived from measured proton chemical shifts, 3J-values, and 1H-1H-NOESY contacts. These findings imply that the conformational space available to simple peptide-based catalysts is more diverse than precedent might suggest. The direct observation of multiple ground state conformations for peptides of this family, as well as the dynamic processes associated with conformational equilibria, underscore not only the challenge of designing peptide-based catalysts, but also the difficulty in predicting their accessible transition states. These findings implicate the advantages of low-barrier interconversions between conformations of peptide-based catalysts for multistep, enantioselective reactions.
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Affiliation(s)
- Anthony
J. Metrano
- Department of Chemistry, Yale University, P.O.
Box 208107, New Haven, Connecticut 06520-8107, United States
| | - Nadia C. Abascal
- Department of Chemistry, Yale University, P.O.
Box 208107, New Haven, Connecticut 06520-8107, United States
| | - Brandon Q. Mercado
- Department of Chemistry, Yale University, P.O.
Box 208107, New Haven, Connecticut 06520-8107, United States
| | - Eric K. Paulson
- Department of Chemistry, Yale University, P.O.
Box 208107, New Haven, Connecticut 06520-8107, United States
| | - Anna E. Hurtley
- Department of Chemistry, Yale University, P.O.
Box 208107, New Haven, Connecticut 06520-8107, United States
| | - Scott J. Miller
- Department of Chemistry, Yale University, P.O.
Box 208107, New Haven, Connecticut 06520-8107, United States
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36
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Frias M, Mas-Ballesté R, Arias S, Alvarado C, Alemán J. Asymmetric Synthesis of Rauhut-Currier type Products by a Regioselective Mukaiyama Reaction under Bifunctional Catalysis. J Am Chem Soc 2017; 139:672-679. [PMID: 28004935 DOI: 10.1021/jacs.6b07851] [Citation(s) in RCA: 50] [Impact Index Per Article: 7.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
The reactivity and the regioselective functionalization of silyl-diene enol ethers under a bifunctional organocatalyst provokes a dramatic change in the regioselectivity, from the 1,5- to the 1,3-functionalization. This variation makes possible the 1,3-addition of silyl-dienol ethers to nitroalkenes, giving access to the synthesis of tri- and tetrasubstituted double bonds in Rauhut-Currier type products. The process takes place under smooth conditions, nonanionic conditions, and with a high enantiomeric excess. A rational mechanistic pathway is presented based on DFT and mechanistic experiments.
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Affiliation(s)
- María Frias
- Department of Organic Chemistry (module 01), Universidad Autónoma de Madrid , Cantoblanco, 28049 Madrid, Spain
| | - Rubén Mas-Ballesté
- Department of Inorganic Chemistry (module 07), Universidad Autónoma de Madrid , 28049 Madrid, Spain
| | - Saira Arias
- División Académica de Ciencias Básicas, Universidad Juárez Autónoma de Tabasco , 86040 Villahermosa, Tabasco, Mexico
| | - Cuauhtemoc Alvarado
- División Académica de Ciencias Básicas, Universidad Juárez Autónoma de Tabasco , 86040 Villahermosa, Tabasco, Mexico
| | - José Alemán
- Department of Organic Chemistry (module 01), Universidad Autónoma de Madrid , Cantoblanco, 28049 Madrid, Spain
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37
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Organocatalytic Friedel–Crafts Alkylation/Lactonization Reaction of Naphthols with 3‐Trifluoroethylidene Oxindoles: The Asymmetric Synthesis of Dihydrocoumarins. Angew Chem Int Ed Engl 2016. [DOI: 10.1002/ange.201609390] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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38
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Zhao YL, Lou QX, Wang LS, Hu WH, Zhao JL. Organocatalytic Friedel-Crafts Alkylation/Lactonization Reaction of Naphthols with 3-Trifluoroethylidene Oxindoles: The Asymmetric Synthesis of Dihydrocoumarins. Angew Chem Int Ed Engl 2016; 56:338-342. [PMID: 27900837 DOI: 10.1002/anie.201609390] [Citation(s) in RCA: 38] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/24/2016] [Revised: 11/07/2016] [Indexed: 11/11/2022]
Abstract
Naphthols and 3-trifluoroethylidene oxindoles were found to undergo an asymmetric Friedel-Crafts alkylation/lactonization reaction, catalyzed by only 2.5 mol % of a quinine-derived squaramide catalyst, to afford the corresponding α-aryl-β-trifluoromethyl dihydrocoumarin derivatives in high yields (up to 99 %) with excellent enantio- and diastereoselectivities (up to 98 % ee, >20:1 d.r.). Importantly, the lactonization proceeded by nucleophilic attack of the naphthol hydroxy group at the amide motif of the oxindoles under mild reaction conditions. This protocol represents a new strategy for the formation of dihydrocoumarins by an efficient intramolecular amide C-N bond-cleavage and esterification process.
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Affiliation(s)
- Yun-Long Zhao
- State Key Laboratory of Respiratory Disease, Guangzhou Institutes of Biomedicine and Health, Chinese Academy of Sciences, Guangzhou, Guangdong, 510530, China
| | - Qin-Xin Lou
- State Key Laboratory of Respiratory Disease, Guangzhou Institutes of Biomedicine and Health, Chinese Academy of Sciences, Guangzhou, Guangdong, 510530, China
| | - Long-Sheng Wang
- Institute of POM-based Materials, School of Material and Chemical Engineering, Hubei University of Technology, Wuhan, 430068, China
| | - Wen-Hui Hu
- State Key Laboratory of Respiratory Disease, Guangzhou Institutes of Biomedicine and Health, Chinese Academy of Sciences, Guangzhou, Guangdong, 510530, China
| | - Jun-Ling Zhao
- State Key Laboratory of Respiratory Disease, Guangzhou Institutes of Biomedicine and Health, Chinese Academy of Sciences, Guangzhou, Guangdong, 510530, China
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39
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Wei Y, Guo R, Dang Y, Nie J, Ma JA. Organocatalytic Enantioselective Decarboxylative Michael Addition of β-Keto Acids to Dicyanoolefins and Disulfonylolefins. Adv Synth Catal 2016. [DOI: 10.1002/adsc.201600485] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Yi Wei
- Department of Chemistry, Tianjin Key Laboratory of Molecular Optoelectronic Sciences; Tianjin University, and Collaborative Innovation Center of Chemical Science and Engineering (Tianjin); Tianjin 300072 People's Republic of China
| | - Ran Guo
- Department of Chemistry, Tianjin Key Laboratory of Molecular Optoelectronic Sciences; Tianjin University, and Collaborative Innovation Center of Chemical Science and Engineering (Tianjin); Tianjin 300072 People's Republic of China
| | - Yanfeng Dang
- Department of Chemistry, Tianjin Key Laboratory of Molecular Optoelectronic Sciences; Tianjin University, and Collaborative Innovation Center of Chemical Science and Engineering (Tianjin); Tianjin 300072 People's Republic of China
| | - Jing Nie
- Department of Chemistry, Tianjin Key Laboratory of Molecular Optoelectronic Sciences; Tianjin University, and Collaborative Innovation Center of Chemical Science and Engineering (Tianjin); Tianjin 300072 People's Republic of China
| | - Jun-An Ma
- Department of Chemistry, Tianjin Key Laboratory of Molecular Optoelectronic Sciences; Tianjin University, and Collaborative Innovation Center of Chemical Science and Engineering (Tianjin); Tianjin 300072 People's Republic of China
- State Key Laboratory of Elemento-organic Chemistry; Nankai University; Tianjin 300072 People's Republic of China
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40
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A General Catalytic Enantioselective Transfer Hydrogenation Reaction of β,β-Disubstituted Nitroalkenes Promoted by a Simple Organocatalyst. Molecules 2016; 21:molecules21081000. [PMID: 27483233 PMCID: PMC6274533 DOI: 10.3390/molecules21081000] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/28/2016] [Revised: 07/15/2016] [Accepted: 07/28/2016] [Indexed: 12/15/2022] Open
Abstract
Given its synthetic relevance, the catalytic enantioselective reduction of β,β-disubstituted nitroalkenes has received a great deal of attention. Several bio-, metal-, and organo-catalytic methods have been developed, which however are usually applicable to single classes of nitroalkene substrates. In this paper, we present an account of our previous work on this transformation, which implemented with new disclosures and mechanistic insights results in a very general protocol for nitroalkene reductions. The proposed methodology is characterized by (i) a remarkably broad scope encompassing various nitroalkene classes; (ii) Hantzsch esters as convenient (on a preparative scale) hydrogen surrogates; (iii) a simple and commercially available thiourea as catalyst; (iv) user-friendly procedures. Overall, the proposed protocol gives a practical dimension to the catalytic enantioselective reduction of β,β-disubstituted nitroalkenes, offering a useful and general platform for the preparation of nitroalkanes bearing a stereogenic center at the β-position in a highly enantioenriched form. A transition state model derived from control kinetic experiments combined with literature data is proposed and discussed. This model accounts and justifies the observed experimental results.
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41
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A One-Pot Tandem Strategy in Catalytic Asymmetric Vinylogous Aldol Reaction of Homoallylic Alcohols. Molecules 2016; 21:molecules21070842. [PMID: 27355935 PMCID: PMC6272830 DOI: 10.3390/molecules21070842] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/14/2016] [Revised: 06/21/2016] [Accepted: 06/22/2016] [Indexed: 11/24/2022] Open
Abstract
Reported is a rationally-designed one-pot sequential strategy that allows homoallylic alcohols to be employed in a catalytic, asymmetric, direct vinylogous aldol reaction with a series of activated acyclic ketones, including trifluoromethyl ketones, γ-ketoesters, and α-keto phosphonates, in high yields (up to 95%) with excellent regio- and enantio-selectivity (up to 99% ee). This modular combination, including Jones oxidation and asymmetric organocatalysis, has satisfactory compatibility and reliability even at a 20 mmol scale, albeit without intermediary purification.
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42
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Organocatalytic Transfer Hydrogenation and Hydrosilylation Reactions. Top Curr Chem (Cham) 2016; 374:29. [DOI: 10.1007/s41061-016-0032-4] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/16/2015] [Accepted: 04/26/2016] [Indexed: 10/21/2022]
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43
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44
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Zhu Y, Zhang L, Luo S. Asymmetric Retro-Claisen Reaction by Chiral Primary Amine Catalysis. J Am Chem Soc 2016; 138:3978-81. [DOI: 10.1021/jacs.6b00627] [Citation(s) in RCA: 59] [Impact Index Per Article: 7.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Affiliation(s)
- Yunbo Zhu
- Beijing
National Laboratory for Molecule Sciences (BNLMS), CAS Key Laboratory
for Molecular Recognition and Function, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, China
- Collaborative Innovation Center of Chemical Science and Engineering, Tianjin 300071, China
| | - Long Zhang
- Beijing
National Laboratory for Molecule Sciences (BNLMS), CAS Key Laboratory
for Molecular Recognition and Function, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, China
- Collaborative Innovation Center of Chemical Science and Engineering, Tianjin 300071, China
| | - Sanzhong Luo
- Beijing
National Laboratory for Molecule Sciences (BNLMS), CAS Key Laboratory
for Molecular Recognition and Function, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, China
- Collaborative Innovation Center of Chemical Science and Engineering, Tianjin 300071, China
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45
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Lai BN, Qiu JF, Zhang HX, Nie J, Ma JA. Stereoselective Synthesis of Fused Aziridines via One-Pot Sequential Decarboxylative Mannich Reaction and Oxidative C–H Amination of Cyclic Imines with β-Ketoacids. Org Lett 2016; 18:520-3. [DOI: 10.1021/acs.orglett.5b03551] [Citation(s) in RCA: 55] [Impact Index Per Article: 6.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Bo-Nan Lai
- Department
of Chemistry, Tianjin University, and Collaborative Innovation Center of Chemical Science and Engineering (Tianjin), Tianjin 300072, P. R. of China
| | - Jian-Feng Qiu
- Department
of Chemistry, Tianjin University, and Collaborative Innovation Center of Chemical Science and Engineering (Tianjin), Tianjin 300072, P. R. of China
| | - Heng-Xia Zhang
- Department
of Chemistry, Tianjin University, and Collaborative Innovation Center of Chemical Science and Engineering (Tianjin), Tianjin 300072, P. R. of China
| | - Jing Nie
- Department
of Chemistry, Tianjin University, and Collaborative Innovation Center of Chemical Science and Engineering (Tianjin), Tianjin 300072, P. R. of China
| | - Jun-An Ma
- Department
of Chemistry, Tianjin University, and Collaborative Innovation Center of Chemical Science and Engineering (Tianjin), Tianjin 300072, P. R. of China
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46
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Wang Y, Pan J, Jiang R, Wang Y, Zhou Z. Stereocontrolled Construction of 3,4‐Dihydrocoumarin Scaffolds with a Quaternary Amino Acid Moiety
via
Chiral Squaramide‐Catalyzed Cascade Michael Addition/Lactonization Reaction. Adv Synth Catal 2016. [DOI: 10.1002/adsc.201500862] [Citation(s) in RCA: 34] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Affiliation(s)
- Yuehua Wang
- Institute and State Key Laboratory of Elemento‐Organic Chemistry, Nankai University, Tianjin 300071, People's Republic of China
- Collaborative Innovation Center of Chemical Science and Engineering, Nankai University, Tianjin 300071, People's Republic of China, Fax: (+86)‐22‐2350‐3627
| | - Jianping Pan
- Institute and State Key Laboratory of Elemento‐Organic Chemistry, Nankai University, Tianjin 300071, People's Republic of China
- Collaborative Innovation Center of Chemical Science and Engineering, Nankai University, Tianjin 300071, People's Republic of China, Fax: (+86)‐22‐2350‐3627
| | - Rongrong Jiang
- Institute and State Key Laboratory of Elemento‐Organic Chemistry, Nankai University, Tianjin 300071, People's Republic of China
- Collaborative Innovation Center of Chemical Science and Engineering, Nankai University, Tianjin 300071, People's Republic of China, Fax: (+86)‐22‐2350‐3627
| | - Youming Wang
- Institute and State Key Laboratory of Elemento‐Organic Chemistry, Nankai University, Tianjin 300071, People's Republic of China
- Collaborative Innovation Center of Chemical Science and Engineering, Nankai University, Tianjin 300071, People's Republic of China, Fax: (+86)‐22‐2350‐3627
| | - Zhenghong Zhou
- Institute and State Key Laboratory of Elemento‐Organic Chemistry, Nankai University, Tianjin 300071, People's Republic of China
- Collaborative Innovation Center of Chemical Science and Engineering, Nankai University, Tianjin 300071, People's Republic of China, Fax: (+86)‐22‐2350‐3627
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47
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Foli G, D'Elia CS, Fochi M, Bernardi L. Reversible modulation of the activity of thiourea catalysts with anions: a simple approach to switchable asymmetric catalysis. RSC Adv 2016. [DOI: 10.1039/c6ra12732k] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023] Open
Abstract
A simple and straightforward approach to switchable asymmetric catalysis is presented, based on the interactions of thiourea catalysts with anions.
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Affiliation(s)
- Giacomo Foli
- Department of Industrial Chemistry “Toso Montanari” and INSTM RU Bologna
- Alma Mater Studiorum – University of Bologna
- 40136 Bologna
- Italy
| | - Cecilia Sasso D'Elia
- Department of Industrial Chemistry “Toso Montanari” and INSTM RU Bologna
- Alma Mater Studiorum – University of Bologna
- 40136 Bologna
- Italy
| | - Mariafrancesca Fochi
- Department of Industrial Chemistry “Toso Montanari” and INSTM RU Bologna
- Alma Mater Studiorum – University of Bologna
- 40136 Bologna
- Italy
| | - Luca Bernardi
- Department of Industrial Chemistry “Toso Montanari” and INSTM RU Bologna
- Alma Mater Studiorum – University of Bologna
- 40136 Bologna
- Italy
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48
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Bernardi L, Fochi M, Carbone R, Martinelli A, Fox ME, Cobley CJ, Kandagatla B, Oruganti S, Dahanukar VH, Carlone A. Organocatalytic Asymmetric Conjugate Additions to Cyclopent‐1‐enecarbaldehyde: A Critical Assessment of Organocatalytic Approaches towards the Telaprevir Bicyclic Core. Chemistry 2015; 21:19208-22. [DOI: 10.1002/chem.201503352] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/24/2015] [Indexed: 11/08/2022]
Affiliation(s)
- Luca Bernardi
- Department of Industrial Chemistry “Toso Montanari” and, INSTM RU Bologna, Alma Mater Studiorum – University of Bologna, V. Risorgimento 4, 40136 Bologna (Italy)
| | - Mariafrancesca Fochi
- Department of Industrial Chemistry “Toso Montanari” and, INSTM RU Bologna, Alma Mater Studiorum – University of Bologna, V. Risorgimento 4, 40136 Bologna (Italy)
| | - Riccardo Carbone
- Department of Industrial Chemistry “Toso Montanari” and, INSTM RU Bologna, Alma Mater Studiorum – University of Bologna, V. Risorgimento 4, 40136 Bologna (Italy)
| | - Ada Martinelli
- Department of Industrial Chemistry “Toso Montanari” and, INSTM RU Bologna, Alma Mater Studiorum – University of Bologna, V. Risorgimento 4, 40136 Bologna (Italy)
| | - Martin E. Fox
- Chirotech Technology Centre, Dr. Reddy's Laboratories, 410 Cambridge Science Park, Milton Road, Cambridge CB4 0PE (UK)
| | - Christopher J. Cobley
- Chirotech Technology Centre, Dr. Reddy's Laboratories, 410 Cambridge Science Park, Milton Road, Cambridge CB4 0PE (UK)
| | - Bhaskar Kandagatla
- Center for Process Research & Innovation, Dr. Reddy's Institute of Life Science, University of Hyderabad Campus, Gachibowli, Hyderabad 500 046, Telangana (India)
| | - Srinivas Oruganti
- Center for Process Research & Innovation, Dr. Reddy's Institute of Life Science, University of Hyderabad Campus, Gachibowli, Hyderabad 500 046, Telangana (India)
| | - Vilas H. Dahanukar
- Innovation Plaza, Integrated Product Development Organization, Dr. Reddy's Laboratories Ltd. Bachupally, Qutubullapur Hyderabad 500 090, Telangana (India)
| | - Armando Carlone
- Chirotech Technology Centre, Dr. Reddy's Laboratories, 410 Cambridge Science Park, Milton Road, Cambridge CB4 0PE (UK)
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49
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Zhao Y, Benz S, Sakai N, Matile S. Selective acceleration of disfavored enolate addition reactions by anion-π interactions. Chem Sci 2015; 6:6219-6223. [PMID: 30090238 PMCID: PMC6054047 DOI: 10.1039/c5sc02563j] [Citation(s) in RCA: 61] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/15/2015] [Accepted: 08/05/2015] [Indexed: 01/17/2023] Open
Abstract
In chemistry and biology, cation-π interactions contribute significantly to many important transformations. In sharp contrast, reactions accomplished with support from the complementary anion-π interactions are essentially unknown. In this report, we show that anion-π interactions can determine the selectivity of the enolate chemistry of malonate half thioesters. Their addition to enolate acceptors is central in natural product biosynthesis but fails without enzymes because non-productive decarboxylation dominates. The newly designed and synthesized anion-π tweezers invert this selectivity by accelerating the disfavored and decelerating the favored process. The discrimination of anionic tautomers of different planarization and charge delocalization on π-acidic surfaces is expected to account for this intriguing "tortoise-and-hare catalysis." Almost exponentially increasing selectivity with increasing π acidity of the catalyst supports that contributions from anion-π interactions are decisive.
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Affiliation(s)
- Yingjie Zhao
- Department of Organic Chemistry , University of Geneva , Geneva , Switzerland . ; http://www.unige.ch/sciences/chiorg/matile/ ; ; Tel: +41 22 379 6523
| | - Sebastian Benz
- Department of Organic Chemistry , University of Geneva , Geneva , Switzerland . ; http://www.unige.ch/sciences/chiorg/matile/ ; ; Tel: +41 22 379 6523
| | - Naomi Sakai
- Department of Organic Chemistry , University of Geneva , Geneva , Switzerland . ; http://www.unige.ch/sciences/chiorg/matile/ ; ; Tel: +41 22 379 6523
| | - Stefan Matile
- Department of Organic Chemistry , University of Geneva , Geneva , Switzerland . ; http://www.unige.ch/sciences/chiorg/matile/ ; ; Tel: +41 22 379 6523
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50
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Dhambri S, Mohammad S, Van Buu ON, Galvani G, Meyer Y, Lannou MI, Sorin G, Ardisson J. Recent advances in the synthesis of natural multifunctionalized decalins. Nat Prod Rep 2015; 32:841-64. [PMID: 25891138 DOI: 10.1039/c4np00142g] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Abstract
This review highlights recent innovative synthetic strategies developed for the stereoselective construction of natural complex decalin systems. It offers an insight into various synthetic targets and approaches and provides information for developments within the area of natural products as well as synthetic methodology.
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Affiliation(s)
- S Dhambri
- Paris Descartes University, Sorbonne Paris Cité, Faculté des Sciences Pharmaceutiques et Biologiques, Unité CNRS UMR 8638 COMÈTE, 4 avenue de l'observatoire, 75270 PARIS Cedex 06.
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