1
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Nagy S, Richter D, Dargó G, Orbán B, Gémes G, Höltzl T, Garádi Z, Fehér Z, Kupai J. Cinchona-Based Hydrogen-Bond Donor Organocatalyst Metal Complexes: Asymmetric Catalysis and Structure Determination. ChemistryOpen 2024; 13:e202300180. [PMID: 38189585 PMCID: PMC11004460 DOI: 10.1002/open.202300180] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/29/2023] [Revised: 11/12/2023] [Indexed: 01/09/2024] Open
Abstract
In this study, we describe the synthesis of cinchona (thio)squaramide and a novel cinchona thiourea organocatalyst. These catalysts were employed in pharmaceutically relevant catalytic asymmetric reactions, such as Michael, Friedel-Crafts, and A3 coupling reactions, in combination with Ag(I), Cu(II), and Ni(II) salts. We identified several organocatalyst-metal salt combinations that led to a significant increase in both yield and enantioselectivity. To gain insight into the active catalyst species, we prepared organocatalyst-metal complexes and characterized them using HRMS, NMR spectroscopy, and quantum chemical calculations (B3LYP-D4/def2-TZVP), which allowed us to establish a structure-activity relationship.
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Affiliation(s)
- Sándor Nagy
- Department of Organic Chemistry and TechnologyBudapest University of Technology and EconomicsMűegyetem rkp. 31111BudapestHungary
- Euroapi Hungary Kft.Tó utca 1–51045BudapestHungary
| | - Dóra Richter
- Department of Organic Chemistry and TechnologyBudapest University of Technology and EconomicsMűegyetem rkp. 31111BudapestHungary
| | - Gyula Dargó
- Department of Organic Chemistry and TechnologyBudapest University of Technology and EconomicsMűegyetem rkp. 31111BudapestHungary
| | - Balázs Orbán
- ELKH-BME Computation Driven Chemistry Research GroupDepartment of Inorganic and Analytical ChemistryBudapest University of Technology and EconomicsMűegyetem rkp. 31111BudapestHungary
- Furukawa Electric Institute of TechnologyKésmárk utca 28/A1157BudapestHungary
| | - Gergő Gémes
- Department of Organic Chemistry and TechnologyBudapest University of Technology and EconomicsMűegyetem rkp. 31111BudapestHungary
| | - Tibor Höltzl
- ELKH-BME Computation Driven Chemistry Research GroupDepartment of Inorganic and Analytical ChemistryBudapest University of Technology and EconomicsMűegyetem rkp. 31111BudapestHungary
- Furukawa Electric Institute of TechnologyKésmárk utca 28/A1157BudapestHungary
| | - Zsófia Garádi
- Department of PharmacognosySemmelweis UniversityÜllői út. 261085BudapesHungary
| | - Zsuzsanna Fehér
- Department of Organic Chemistry and TechnologyBudapest University of Technology and EconomicsMűegyetem rkp. 31111BudapestHungary
| | - József Kupai
- Department of Organic Chemistry and TechnologyBudapest University of Technology and EconomicsMűegyetem rkp. 31111BudapestHungary
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2
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Hu X, Zhu Z, Li Z, Adili A, Odagi M, Abboud KA, Seidel D. Catalytic Enantioselective [4+2] Cycloadditions of Salicylaldehyde Acetals with Enol Ethers. Angew Chem Int Ed Engl 2024; 63:e202315759. [PMID: 38055210 DOI: 10.1002/anie.202315759] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/18/2023] [Revised: 11/28/2023] [Accepted: 11/30/2023] [Indexed: 12/07/2023]
Abstract
A readily accessible conjugate-base-stabilized carboxylic acid (CBSCA) catalyst facilitates highly enantioselective [4+2] cycloaddition reactions of salicylaldehyde-derived acetals and cyclic enol ethers, resulting in the formation of polycyclic chromanes with oxygenation in the 2- and 4-positions. Stereochemically more complex products can be obtained from racemic enol ethers. Spirocyclic products are also accessible.
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Affiliation(s)
- Xiaojun Hu
- Center for Heterocyclic Compounds, Department of Chemistry, University of Florida, Gainesville, FL 32611, USA
| | - Zhengbo Zhu
- Center for Heterocyclic Compounds, Department of Chemistry, University of Florida, Gainesville, FL 32611, USA
| | - Zhongzheng Li
- Center for Heterocyclic Compounds, Department of Chemistry, University of Florida, Gainesville, FL 32611, USA
| | - Alafate Adili
- Center for Heterocyclic Compounds, Department of Chemistry, University of Florida, Gainesville, FL 32611, USA
| | - Minami Odagi
- Center for Heterocyclic Compounds, Department of Chemistry, University of Florida, Gainesville, FL 32611, USA
- Department of Biotechnology and Life Science, Graduate School of Technology, Tokyo University of Agriculture and Technology, 2-24-16, Naka-cho, Koganei city, 184-8588, Tokyo, Japan
| | - Khalil A Abboud
- Center for X-ray Crystallography, Department of Chemistry, University of Florida, Gainesville, FL 32611, USA
| | - Daniel Seidel
- Center for Heterocyclic Compounds, Department of Chemistry, University of Florida, Gainesville, FL 32611, USA
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3
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Iribarren I, Mates-Torres E, Trujillo C. Revisiting ion-pair interactions in phase transfer catalysis: from ionic compounds to real catalyst systems. Dalton Trans 2024; 53:1322-1335. [PMID: 38116737 DOI: 10.1039/d3dt03978a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2023]
Abstract
Ion-pairing is a fundamental phenomenon that significantly influences phase-transfer catalysis. In this study, we conduct a comprehensive investigation of ion-pair interactions, aiming to establish a comprehensive understanding of their nature and implications. The study begins with the examination of polar ionic compounds to define the concept of an ion-pair in the context of phase-transfer catalysis. Subsequently, a diverse range of ion-pair catalyst models were explored to gain insight into the factors governing their interactions. Finally, the focus shifts towards the characterisation of real phase-transfer catalysts, bridging the gap between theoretical models and practical applications. Through a combination of computational approaches and theoretical analysis, this work provides valuable insight into the nature of ion-pair interactions within phase-transfer catalysis fields.
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Affiliation(s)
- Iñigo Iribarren
- School of Chemistry, Trinity College Dublin, The University of Dublin, 154-160 Pearse Street, D02 R590 Dublin, Ireland
| | - Eric Mates-Torres
- School of Chemistry, Trinity College Dublin, The University of Dublin, 154-160 Pearse Street, D02 R590 Dublin, Ireland
| | - Cristina Trujillo
- School of Chemistry, Trinity College Dublin, The University of Dublin, 154-160 Pearse Street, D02 R590 Dublin, Ireland
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4
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Pan G, Pu M, Wang H, Ying M, Li Y, Dong S, Feng X, Liu X. Catalytic Enantioselective Nucleophilic Addition to Arynes by a New Quaternary Guanidinium Salt-Based Phase-Transfer Catalyst. J Am Chem Soc 2023; 145:26318-26327. [PMID: 37962558 DOI: 10.1021/jacs.3c09594] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2023]
Abstract
Owing to the mild generation methods, arynes have been widely used in synthetic chemistry. However, achieving asymmetric organocatalytic reactions with arynes remains a formidable and infrequent challenge, primarily because these neutral and transient species tend to spontaneously quench. To address this issue, a solid-liquid phase-transfer strategy is devised in which the generation speed of arynes could be controlled by the in situ generated fluoride-based chiral phase-transfer catalyst. In this study, we present a catalytic enantioselective nucleophilic addition reaction involving arynes, utilizing an amino amide-based guanidinium salt QG•X. Furthermore, we demonstrate the broad compatibility of this reaction with various arynes and cyclic/acyclic β-keto amides, leading to the creation of diverse α-aryl quaternary stereocenters with good stereoselectivity. Mechanistic investigations have uncovered the potential involvement of a chiral intramolecular cationic-anionic pair and HF during the ion exchange between QG•X and CsF for nucleophile activation and aryne generation. Additionally, DFT calculations suggested that the observed high levels of enantioselectivity can be attributed to steric repulsion and the cumulative noncovalent interactions between the catalysts and substrates.
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Affiliation(s)
- Guihua Pan
- Key Laboratory of Green Chemistry & Technology, Ministry of Education, College of Chemistry, Sichuan University, Chengdu 610064, China
| | - Maoping Pu
- Key Laboratory of Green Chemistry & Technology, Ministry of Education, College of Chemistry, Sichuan University, Chengdu 610064, China
| | - Hongyu Wang
- Key Laboratory of Green Chemistry & Technology, Ministry of Education, College of Chemistry, Sichuan University, Chengdu 610064, China
| | - Meijia Ying
- Key Laboratory of Green Chemistry & Technology, Ministry of Education, College of Chemistry, Sichuan University, Chengdu 610064, China
| | - Yi Li
- Key Laboratory of Green Chemistry & Technology, Ministry of Education, College of Chemistry, Sichuan University, Chengdu 610064, China
| | - Shunxi Dong
- Key Laboratory of Green Chemistry & Technology, Ministry of Education, College of Chemistry, Sichuan University, Chengdu 610064, China
| | - Xiaoming Feng
- Key Laboratory of Green Chemistry & Technology, Ministry of Education, College of Chemistry, Sichuan University, Chengdu 610064, China
| | - Xiaohua Liu
- Key Laboratory of Green Chemistry & Technology, Ministry of Education, College of Chemistry, Sichuan University, Chengdu 610064, China
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5
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Mairhofer C, Waser M. Dibenzoylperoxide as a Versatile Oxidant for Oxidative Azidations of Phenols Using Quaternary Ammonium Iodides or Bromides. Adv Synth Catal 2023; 365:2757-2762. [DOI: 10.1002/adsc.202300405] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/24/2023] [Indexed: 09/02/2023]
Abstract
AbstractDibenzoylperoxide emerged as a versatile oxidant for quaternary ammonium iodide or bromide‐catalyzed reactions of phenol derivatives with NaN3. While the use of iodides allowed for efficient benzylic azidations under these oxidative conditions, the use of bromides allowed for dearomative azidations instead. Both approaches have been successfully applied to different phenol derivatives and a first proof‐of‐concept for an enantioselective variant using chiral quat. ammonium bromides has been obtained as well.
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Affiliation(s)
- Christopher Mairhofer
- Institute of Organic Chemistry Johannes Kepler University Linz Altenbergerstr. 69 4040 Linz Austria
| | - Mario Waser
- Institute of Organic Chemistry Johannes Kepler University Linz Altenbergerstr. 69 4040 Linz Austria
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6
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Stockhammer L, Craik R, Monkowius U, Cordes DB, Smith AD, Waser M. Isothiourea-Catalyzed Enantioselective Functionalisation of Glycine Schiff Base Aryl Esters via 1,6- and 1,4-Additions. CHEMISTRYEUROPE 2023; 1:e202300015. [PMID: 38882579 PMCID: PMC7616101 DOI: 10.1002/ceur.202300015] [Citation(s) in RCA: 6] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 02/28/2023] [Indexed: 06/18/2024]
Abstract
The enantioselective α-functionalisation of glycine Schiff base aryl esters through isothiourea catalysis is successfully demonstrated for 1,6-additions to para-quinone methides (21 examples, up to 95:5 dr and 96:4 er) and 1,4-additions to methylene substituted dicarbonyl or disulfonyl Michael acceptors (17 examples, up to 98:2 er). This nucleophilic organocatalysis approach gives access to a range of α-functionalised α-amino acid derivatives and further transformations of the activated aryl ester group provide a straightforward entry to advanced amino acid-based esters, amides or thioesters.
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Affiliation(s)
- Lotte Stockhammer
- Institute of Organic Chemistry, Johannes Kepler University Linz, Altenbergerstrasse 69, 4040 Linz (Austria)
| | - Rebecca Craik
- EaStCHEM, School of Chemistry, University of St Andrews, KY16 9ST St Andrews, Fife, (UK)
| | - Uwe Monkowius
- School of Education, Chemistry, Johannes Kepler University Linz, Altenbergerstrasse 69, 4040 Linz (Austria)
| | - David B Cordes
- EaStCHEM, School of Chemistry, University of St Andrews, KY16 9ST St Andrews, Fife, (UK)
| | - Andrew D Smith
- EaStCHEM, School of Chemistry, University of St Andrews, KY16 9ST St Andrews, Fife, (UK)
| | - Mario Waser
- Institute of Organic Chemistry, Johannes Kepler University Linz, Altenbergerstrasse 69, 4040 Linz (Austria)
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7
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Adili A, Webster JP, Zhao C, Mallojjala SC, Romero-Reyes MA, Ghiviriga I, Abboud KA, Vetticatt MJ, Seidel D. Mechanism of a Dually Catalyzed Enantioselective Oxa-Pictet-Spengler Reaction and the Development of a Stereodivergent Variant. ACS Catal 2023; 13:2240-2249. [PMID: 37711191 PMCID: PMC10501388 DOI: 10.1021/acscatal.2c05484] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
Abstract
Enantioselective oxa-Pictet-Spengler reactions of tryptophol with aldehydes proceed under weakly acidic conditions utilizing a combination of two catalysts, an indoline HCl salt and a bisthiourea compound. Mechanistic investigations revealed the roles of both catalysts and confirmed the involvement of oxocarbenium ion intermediates, ruling out alternative scenarios. A stereochemical model was derived from density functional theory calculations, which provided the basis for the development of a highly enantioselective stereodivergent variant with racemic tryptophol derivatives.
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Affiliation(s)
- Alafate Adili
- Center for Heterocyclic Compounds, Department of Chemistry, University of Florida, Gainesville, Florida 32611, United States
| | - John-Paul Webster
- Department of Chemistry, Binghamton University, Binghamton, New York 13902, United States
| | - Chenfei Zhao
- Department of Chemistry and Chemical Biology, Rutgers, The State University of New Jersey, Piscataway, New Jersey 08854, United States
| | | | - Moises A Romero-Reyes
- Center for Heterocyclic Compounds, Department of Chemistry, University of Florida, Gainesville, Florida 32611, United States
| | - Ion Ghiviriga
- Center for NMR Spectroscopy, Department of Chemistry, University of Florida, Gainesville, Florida 32611, United States
| | - Khalil A Abboud
- Center for X-ray Crystallography, Department of Chemistry, University of Florida, Gainesville, Florida 32611, United States
| | - Mathew J Vetticatt
- Department of Chemistry, Binghamton University, Binghamton, New York 13902, United States
| | - Daniel Seidel
- Department of Chemistry, University of Florida, Gainesville, Florida 32611, United States
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8
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Xu B, Zhang Z, Han J, Gu G, Zhang J. Enantioselectivity Tunable Gold‐catalyzed Intermolecular [3+2] Cycloaddition of
N
‐Allenamides
with Nitrones. CHINESE J CHEM 2022. [DOI: 10.1002/cjoc.202200017] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Bing Xu
- Department of Chemistry Fudan University, 2005 Songhu Road Shanghai 200438 P. R. China
- Zhuhai Fudan Innovation Institute Zhuhai 519000 China
| | - Zhan‐Ming Zhang
- Department of Chemistry Fudan University, 2005 Songhu Road Shanghai 200438 P. R. China
| | - Jie Han
- Department of Chemistry Fudan University, 2005 Songhu Road Shanghai 200438 P. R. China
- Zhuhai Fudan Innovation Institute Zhuhai 519000 China
| | - Guangxin Gu
- Department of Materials Science Fudan University, 2005 Songhu Road Shanghai 200438 P.R China
- Zhuhai Fudan Innovation Institute Zhuhai 519000 China
| | - Junliang Zhang
- Department of Chemistry Fudan University, 2005 Songhu Road Shanghai 200438 P. R. China
- Zhuhai Fudan Innovation Institute Zhuhai 519000 China
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9
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Lam Y, Huang J, Jiang X, Yeung Y. Cinchona Alkaloid‐Derived Zwitterions Catalyzed Enantioselective Steglich Rearrangement and Aldol Reaction of
O
‐Acylated Oxindoles. ChemCatChem 2022. [DOI: 10.1002/cctc.202200136] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Ying‐Pong Lam
- Department of Chemistry and State Key Laboratory of Synthetic Chemistry The Chinese University of Hong Kong Shatin N.T., Hong Kong P. R. China
| | - Jingxian Huang
- Department of Chemistry and State Key Laboratory of Synthetic Chemistry The Chinese University of Hong Kong Shatin N.T., Hong Kong P. R. China
| | - Xiaojian Jiang
- International Cooperative Laboratory of Traditional Chinese Medicine Modernization and Innovative Drug Development of Chinese Ministry of Education Collage of Pharmacy Jinan University Guangzhou 510632 P. R. China
| | - Ying‐Yeung Yeung
- Department of Chemistry and State Key Laboratory of Synthetic Chemistry The Chinese University of Hong Kong Shatin N.T., Hong Kong P. R. China
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10
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Peng B, Ma J, Guo J, Gong Y, Wang R, Zhang Y, Zeng J, Chen WW, Ding K, Zhao B. A Powerful Chiral Super Brønsted C-H Acid for Asymmetric Catalysis. J Am Chem Soc 2022; 144:2853-2860. [PMID: 35143204 DOI: 10.1021/jacs.1c12723] [Citation(s) in RCA: 11] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
A new type of chiral super Brønsted C-H acids, BINOL-derived phosphoryl bis((trifluoromethyl)sulfonyl) methanes (BPTMs), were developed. As compared to widely utilized BINOL-derived chiral phosphoric acids (BPAs) and N-triflyl phosphoramides (NTPAs), BPTMs displayed much higher Brønsted acidity, resulting in dramatically improved activity and excellent enantioselectivity as demonstrated in catalytic asymmetric Mukaiyama-Mannich reaction, allylic amination, three-component coupling of allyltrimethylsilane with 9-fluorenylmethyl carbamate and aldehydes, and protonation of silyl enol ether. These new strong Brønsted C-H acids have provided a platform for expanding the chemistry of asymmetric Brønsted acid catalysis.
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Affiliation(s)
- Bingfei Peng
- The Education Ministry Key Lab of Resource Chemistry, Shanghai Key Laboratory of Rare Earth Functional Materials, and Shanghai Frontiers Science Center of Biomimetic Catalysis, Shanghai Normal University, Shanghai 200234, China
| | - Jiguo Ma
- The Education Ministry Key Lab of Resource Chemistry, Shanghai Key Laboratory of Rare Earth Functional Materials, and Shanghai Frontiers Science Center of Biomimetic Catalysis, Shanghai Normal University, Shanghai 200234, China.,State Key Laboratory of Organometallic Chemistry, Center for Excellence in Molecular Synthesis, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, 345 Lingling Road, Shanghai 200032, China
| | - Jianhua Guo
- The Education Ministry Key Lab of Resource Chemistry, Shanghai Key Laboratory of Rare Earth Functional Materials, and Shanghai Frontiers Science Center of Biomimetic Catalysis, Shanghai Normal University, Shanghai 200234, China
| | - Yating Gong
- The Education Ministry Key Lab of Resource Chemistry, Shanghai Key Laboratory of Rare Earth Functional Materials, and Shanghai Frontiers Science Center of Biomimetic Catalysis, Shanghai Normal University, Shanghai 200234, China
| | - Ronghao Wang
- The Education Ministry Key Lab of Resource Chemistry, Shanghai Key Laboratory of Rare Earth Functional Materials, and Shanghai Frontiers Science Center of Biomimetic Catalysis, Shanghai Normal University, Shanghai 200234, China
| | - Yi Zhang
- The Education Ministry Key Lab of Resource Chemistry, Shanghai Key Laboratory of Rare Earth Functional Materials, and Shanghai Frontiers Science Center of Biomimetic Catalysis, Shanghai Normal University, Shanghai 200234, China.,State Key Laboratory of Organometallic Chemistry, Center for Excellence in Molecular Synthesis, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, 345 Lingling Road, Shanghai 200032, China
| | - Jinlong Zeng
- The Education Ministry Key Lab of Resource Chemistry, Shanghai Key Laboratory of Rare Earth Functional Materials, and Shanghai Frontiers Science Center of Biomimetic Catalysis, Shanghai Normal University, Shanghai 200234, China
| | - Wen-Wen Chen
- The Education Ministry Key Lab of Resource Chemistry, Shanghai Key Laboratory of Rare Earth Functional Materials, and Shanghai Frontiers Science Center of Biomimetic Catalysis, Shanghai Normal University, Shanghai 200234, China
| | - Kuiling Ding
- State Key Laboratory of Organometallic Chemistry, Center for Excellence in Molecular Synthesis, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, 345 Lingling Road, Shanghai 200032, China
| | - Baoguo Zhao
- The Education Ministry Key Lab of Resource Chemistry, Shanghai Key Laboratory of Rare Earth Functional Materials, and Shanghai Frontiers Science Center of Biomimetic Catalysis, Shanghai Normal University, Shanghai 200234, China
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11
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Osminski WEG, Lu Z, Zhao W, Mohammadlou A, Yin X, Matthews EC, Canestraight VM, Staples RJ, Allen CJ, Hirschi JS, Wulff WD. Probing Catalyst Function - Electronic Modulation of Chiral Polyborate Anionic Catalysts. J Org Chem 2021; 86:17762-17773. [PMID: 34852456 DOI: 10.1021/acs.joc.1c01769] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Boroxinate complexes of VAPOL and VANOL are a chiral anionic platform that can serve as a versatile staging arena for asymmetric catalysis. The structural underpinning of the platform is a chiral polyborate core that covalently links together alcohols (or phenols) and vaulted biaryl ligands. The polyborate platform is assembled in situ by the substrate of the reaction, and thus a multiplex of chiral catalysts can be rapidly assembled from various alcohols (or phenols) and bis-phenol ligands for screening of catalyst activity. In the present study, variations in the steric and electronic properties of the phenol/alcohol component of the boroxinate catalyst are probed to reveal their effects on the asymmetric induction in the catalytic asymmetric aziridination reaction. A Hammett study is consistent with a mechanism in which the two substrates are hydrogen-bonded to the boroxinate core in the enantiogenic step. The results of the Hammett study are supported by a computational study in which it is found that the H-O distance of the protonated imine hydrogen bonded to the anionic boroxinate core decreases with an increase in the electron releasing ability of the phenol unit incorporated into the boroxinate. The results are not consistent with a mechanism in which the boroxinate catalyst functions as a Lewis acid and activates the imine by a Lewis acid/Lewis base interaction.
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Affiliation(s)
- Wynter E G Osminski
- Department of Chemistry, Michigan State University, East Lansing, Michigan 48824, United States
| | - Zhenjie Lu
- Department of Chemistry, Michigan State University, East Lansing, Michigan 48824, United States
| | - Wenjun Zhao
- Department of Chemistry, Michigan State University, East Lansing, Michigan 48824, United States
| | - Aliakbar Mohammadlou
- Department of Chemistry, Michigan State University, East Lansing, Michigan 48824, United States
| | - Xiaopeng Yin
- Department of Chemistry, Michigan State University, East Lansing, Michigan 48824, United States
| | - Emily C Matthews
- Department of Chemistry, Michigan State University, East Lansing, Michigan 48824, United States
| | - Virginia M Canestraight
- Department of Chemistry, Michigan State University, East Lansing, Michigan 48824, United States
| | - Richard J Staples
- Department of Chemistry, Michigan State University, East Lansing, Michigan 48824, United States
| | - Connor J Allen
- Department of Chemistry, Binghamton University, Binghamton, New York 13902, United States
| | - Jennifer S Hirschi
- Department of Chemistry, Binghamton University, Binghamton, New York 13902, United States
| | - William D Wulff
- Department of Chemistry, Michigan State University, East Lansing, Michigan 48824, United States
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12
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Wakafuji K, Iwasa S, Ouchida KN, Cho H, Dohi H, Yamamoto E, Kamachi T, Tokunaga M. Dynamic Kinetic Resolution of Azlactones via Phase-Transfer Catalytic Alcoholysis. ACS Catal 2021. [DOI: 10.1021/acscatal.1c03076] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Affiliation(s)
- Kodai Wakafuji
- Department of Chemistry, Graduate School of Science, Kyushu University, 744 Motooka, Nishi-ku, Fukuoka 819-0395, Japan
| | - Satsuki Iwasa
- Department of Chemistry, Graduate School of Science, Kyushu University, 744 Motooka, Nishi-ku, Fukuoka 819-0395, Japan
| | - Kina N. Ouchida
- Department of Chemistry, Graduate School of Science, Kyushu University, 744 Motooka, Nishi-ku, Fukuoka 819-0395, Japan
| | - Hyemin Cho
- Department of Chemistry, Graduate School of Science, Kyushu University, 744 Motooka, Nishi-ku, Fukuoka 819-0395, Japan
| | - Hirotsugu Dohi
- Department of Chemistry, Graduate School of Science, Kyushu University, 744 Motooka, Nishi-ku, Fukuoka 819-0395, Japan
| | - Eiji Yamamoto
- Department of Chemistry, Graduate School of Science, Kyushu University, 744 Motooka, Nishi-ku, Fukuoka 819-0395, Japan
| | - Takashi Kamachi
- Department of Life, Environment and Applied Chemistry, Fukuoka Institute of Technology, 3-30-1 Wajiro-higashi, Higashi-ku, Fukuoka 811-0295, Japan
| | - Makoto Tokunaga
- Department of Chemistry, Graduate School of Science, Kyushu University, 744 Motooka, Nishi-ku, Fukuoka 819-0395, Japan
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13
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Organocatalysis: A Tool of Choice for the Enantioselective Nucleophilic Dearomatization of Electron-Deficient Six-Membered Ring Azaarenium Salts. Catalysts 2021. [DOI: 10.3390/catal11101249] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022] Open
Abstract
Nucleophilic dearomatization of azaarenium salts is a powerful strategy to access 3D scaffolds of interest from easily accessible planar aromatic azaarene compounds. Moreover, this approach yields complex dihydroazaarenes by allowing the functionalization of the scaffold simultaneously to the dearomatization step. On the other side, organocatalysis is nowadays recognized as one of the pillars of the asymmetric catalysis field of research and is well-known to afford a high level of enantioselectivity for a myriad of transformations thanks to well-organized transition states resulting from low-energy interactions (electrostatic and/or H-bonding interactions…). Consequently, in the last fifteen years, organocatalysis has met great success in nucleophilic dearomatization of azaarenium salts. This review summarizes the work achieved up to date in the field of organocatalyzed nucleophilic dearomatization of azaarenium salts (mainly pyridinium, quinolinium, quinolinium and acridinium salts). A classification by organocatalytic mode of activation will be disclosed by shedding light on their related advantages and drawbacks. The versatility of the dearomatization approach will also be demonstrated by discussing several chemical transformations of the resulting dihydroazaarenes towards the synthesis of structurally complex compounds.
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14
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Shekurov RP, Gilmanova LH, Zagidullin AA, Miluykov VA. 2-[1-(Dimethylamino)ethyl]ferrocenylphosphinic acid as an organocatalyst of Michael and Friedel—Crafts reactions. Russ Chem Bull 2021. [DOI: 10.1007/s11172-021-3233-0] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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15
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Hu RB, Lam YP, Ng WH, Wong CY, Yeung YY. Zwitterion-Induced Organic–Metal Hybrid Catalysis in Aerobic Oxidation. ACS Catal 2021. [DOI: 10.1021/acscatal.0c05684] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Rong-Bin Hu
- Department of Chemistry and State Key Laboratory of Synthetic Chemistry, The Chinese University of Hong Kong, Shatin, NT, Hong Kong
| | - Ying-Pong Lam
- Department of Chemistry and State Key Laboratory of Synthetic Chemistry, The Chinese University of Hong Kong, Shatin, NT, Hong Kong
| | - Wing-Hin Ng
- Department of Chemistry and State Key Laboratory of Synthetic Chemistry, The Chinese University of Hong Kong, Shatin, NT, Hong Kong
| | - Chun-Yuen Wong
- Department of Chemistry, City University of Hong Kong, Tat Chee Avenue, Kowloon, Hong Kong
| | - Ying-Yeung Yeung
- Department of Chemistry and State Key Laboratory of Synthetic Chemistry, The Chinese University of Hong Kong, Shatin, NT, Hong Kong
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16
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Lam YP, Lam Z, Yeung YY. Zwitterion-Catalyzed Isomerization of Maleic to Fumaric Acid Diesters. J Org Chem 2021; 86:1183-1190. [PMID: 33315398 DOI: 10.1021/acs.joc.0c02316] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Fumaric acid diesters are important building blocks for organic synthesis. A class of zwitterionic organocatalysts based on an amide anion/iminium cation charge pair were found to be effective in catalyzing the isomerization of maleic acid diesters to give fumaric acid diesters. Comparison of the performance of different zwitterionic organocatalysts toward the reaction revealed that nonclassical hydrogen bonding was involved in the stabilization of the Michael adduct intermediate.
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Affiliation(s)
- Ying-Pong Lam
- Department of Chemistry and State Key Laboratory of Synthetic Chemistry, The Chinese University of Hong Kong, Shatin, NT, Hong Kong
| | - Zachary Lam
- Department of Chemistry and State Key Laboratory of Synthetic Chemistry, The Chinese University of Hong Kong, Shatin, NT, Hong Kong
| | - Ying-Yeung Yeung
- Department of Chemistry and State Key Laboratory of Synthetic Chemistry, The Chinese University of Hong Kong, Shatin, NT, Hong Kong
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17
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Thiourea–Tertiary Amine Promoted Cascade Catalysis: A Tool for Complexity Generation. European J Org Chem 2020. [DOI: 10.1002/ejoc.202001114] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
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18
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Metternich JB, Reiterer M, Jacobsen EN. Asymmetric Nazarov Cyclizations of Unactivated Dienones by Hydrogen-Bond-Donor/Lewis Acid Co-Catalyzed, Enantioselective Proton-Transfer. Adv Synth Catal 2020; 362:4092-4097. [PMID: 33162875 PMCID: PMC7643875 DOI: 10.1002/adsc.202000831] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/24/2020] [Indexed: 12/15/2022]
Abstract
We report an enantioselective Nazarov cyclization catalyzed by chiral hydrogen-bond-donors in concert with silyl Lewis acids. The developed transformation provides access to tri-substituted cyclopentenones in high levels of enantioselectivity (up to 95% e.e.) from a variety of simple unactivated dienones. Kinetic and mechanistic studies are consistent with a reversible 4π-electrocyclization C-C bond-forming step followed by rate- and enantio-determining proton-transfer as the mode of catalysis.
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Affiliation(s)
- Jan B Metternich
- Department of Chemistry and Chemical Biology, Harvard University, Cambridge, Massachusetts 02138, USA
| | - Martin Reiterer
- Department of Chemistry and Chemical Biology, Harvard University, Cambridge, Massachusetts 02138, USA
| | - Eric N Jacobsen
- Department of Chemistry and Chemical Biology, Harvard University, Cambridge, Massachusetts 02138, USA
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19
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Zhu Z, Odagi M, Supantanapong N, Xu W, Saame J, Kirm HU, Abboud KA, Leito I, Seidel D. Modular Design of Chiral Conjugate-Base-Stabilized Carboxylic Acids: Catalytic Enantioselective [4 + 2] Cycloadditions of Acetals. J Am Chem Soc 2020; 142:15252-15258. [PMID: 32830974 DOI: 10.1021/jacs.0c07212] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Abstract
Readily available 1,2-amino alcohols provide the framework for a new generation of chiral carboxylic acid catalysts that rival the acidity of the widely used chiral phosphoric acid catalyst (S)-TRIP. Covalently linked thiourea sites stabilize the carboxylate conjugate bases of these catalysts via anion-binding, an interaction that is largely responsible for the low pKa values. The utility of the new catalysts is illustrated in the context of challenging [4 + 2] cycloadditions of salicylaldehyde-derived acetals with homoallylic and bishomoallylic alcohols, providing polycyclic chromanes in a highly enantioselective fashion.
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Affiliation(s)
- Zhengbo Zhu
- Center for Heterocyclic Compounds, Department of Chemistry, University of Florida, Gainesville, Florida 32611, United States
| | - Minami Odagi
- Center for Heterocyclic Compounds, Department of Chemistry, University of Florida, Gainesville, Florida 32611, United States.,Department of Biotechnology and Life Science, Graduate School of Technology, Tokyo University of Agriculture and Technology, 2-24-16, Naka-cho, Koganei city, 184-8588, Tokyo, Japan
| | - Nantamon Supantanapong
- Center for Heterocyclic Compounds, Department of Chemistry, University of Florida, Gainesville, Florida 32611, United States
| | - Weici Xu
- Center for Heterocyclic Compounds, Department of Chemistry, University of Florida, Gainesville, Florida 32611, United States
| | - Jaan Saame
- Institute of Chemistry, University of Tartu, Tartu, Estonia
| | | | - Khalil A Abboud
- Center for X-ray Crystallography, Department of Chemistry, University of Florida, Gainesville, Florida 32611, United States
| | - Ivo Leito
- Institute of Chemistry, University of Tartu, Tartu, Estonia
| | - Daniel Seidel
- Center for Heterocyclic Compounds, Department of Chemistry, University of Florida, Gainesville, Florida 32611, United States
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20
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Hu J, Gao YQ, Xu D, Chen L, Wen W, Hou Y, Chen L, Xie W. Highly enantioselective addition of aliphatic aldehydes to 2-hydroxychalcone enabled by cooperative organocatalysts. Chem Commun (Camb) 2020; 56:10018-10021. [PMID: 32724997 DOI: 10.1039/d0cc04424e] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
Herein, we developed an enantioselective addition of aliphatic aldehydes to 2-hydroxychalcone promoted by cooperative organocatalysts, giving access to hybrid flavonoids in excellent enantioselectivities. This reaction took advantage of cycloisomerization of 2-hydroxychalcone to form a transient flavylium under the irradiation of 24 W CFL, which was trapped by the in situ generated chiral enamine intermediate. The synergistic action of chiral phosphoric acid secured the excellent outcome of this reaction by ion-pairing with the transient flavylium.
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Affiliation(s)
- Jiadong Hu
- Shaanxi Key Laboratory of Natural Products & Chemical Biology, College of Chemistry & Pharmacy, Northwest A&F University, 22 Xinong Road, Yangling 712100, Shaanxi, China.
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21
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Ke Z, Lam YP, Chan KS, Yeung YY. Zwitterion-Catalyzed Deacylative Dihalogenation of β-Oxo Amides. Org Lett 2020; 22:7353-7357. [DOI: 10.1021/acs.orglett.0c02701] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Affiliation(s)
- Zhihai Ke
- Department of Chemistry and State Key Laboratory of Synthetic Chemistry, The Chinese University of Hong Kong, Shatin, New Territories, Hong Kong
| | - Ying-Pong Lam
- Department of Chemistry and State Key Laboratory of Synthetic Chemistry, The Chinese University of Hong Kong, Shatin, New Territories, Hong Kong
| | - Kin-San Chan
- Department of Chemistry and State Key Laboratory of Synthetic Chemistry, The Chinese University of Hong Kong, Shatin, New Territories, Hong Kong
| | - Ying-Yeung Yeung
- Department of Chemistry and State Key Laboratory of Synthetic Chemistry, The Chinese University of Hong Kong, Shatin, New Territories, Hong Kong
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22
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Haider V, Kreuzer V, Tiffner M, Spingler B, Waser M. Ammonium Salt-Catalyzed Ring-Opening of Aryl-Aziridines with β-Keto Esters. European J Org Chem 2020; 2020:5173-5177. [PMID: 32982577 PMCID: PMC7508174 DOI: 10.1002/ejoc.202000916] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2020] [Indexed: 02/03/2023]
Abstract
We herein report an ammonium salt-catalyzed protocol for the regioselective ring opening of aryl-aziridines with β-keto esters. The reaction gives access to a variety of highly functionalized target molecules with two consecutive stereo-genic centers and can be rendered enantioselective (up to e.r. = 91:9) by using bifunctional chiral ammonium salt catalysts.
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Affiliation(s)
- Victoria Haider
- Institute of Organic ChemistryJohannes Kepler University LinzAltenbergerstr. 694040LinzAustria
| | - Viktoria Kreuzer
- Institute of Organic ChemistryJohannes Kepler University LinzAltenbergerstr. 694040LinzAustria
| | - Maximilian Tiffner
- Institute of Organic ChemistryJohannes Kepler University LinzAltenbergerstr. 694040LinzAustria
| | - Bernhard Spingler
- Department of ChemistryUniversity of ZurichWinterthurerstrasse 1908057ZurichSwitzerland
| | - Mario Waser
- Institute of Organic ChemistryJohannes Kepler University LinzAltenbergerstr. 694040LinzAustria
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23
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Zou L, Huang J, Liao N, Liu Y, Guo Q, Peng Y. Catalytic Asymmetric Three-Component Reaction of 2-Alkynylbenzaldehydes, Amines, and Dimethylphosphonate. Org Lett 2020; 22:6932-6937. [DOI: 10.1021/acs.orglett.0c02487] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Affiliation(s)
- Liangliang Zou
- Key Laboratory of Applied Chemistry of Chongqing Municipality, School of Chemistry and Chemical Engineering, Southwest University, Chongqing 400715, China
| | - Jiaying Huang
- Key Laboratory of Applied Chemistry of Chongqing Municipality, School of Chemistry and Chemical Engineering, Southwest University, Chongqing 400715, China
| | - Na Liao
- Key Laboratory of Applied Chemistry of Chongqing Municipality, School of Chemistry and Chemical Engineering, Southwest University, Chongqing 400715, China
| | - Yan Liu
- Key Laboratory of Applied Chemistry of Chongqing Municipality, School of Chemistry and Chemical Engineering, Southwest University, Chongqing 400715, China
| | - Qixiang Guo
- Key Laboratory of Applied Chemistry of Chongqing Municipality, School of Chemistry and Chemical Engineering, Southwest University, Chongqing 400715, China
| | - Yungui Peng
- Key Laboratory of Applied Chemistry of Chongqing Municipality, School of Chemistry and Chemical Engineering, Southwest University, Chongqing 400715, China
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24
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Mairhofer C, Novacek J, Waser M. Synergistic Ammonium (Hypo)Iodite/Imine Catalysis for the Asymmetric α-Hydroxylation of β-Ketoesters. Org Lett 2020; 22:6138-6142. [PMID: 32706973 PMCID: PMC7418104 DOI: 10.1021/acs.orglett.0c02198] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/03/2020] [Indexed: 12/14/2022]
Abstract
The synergistic use of chiral bifunctional ammonium iodide catalysts in combination with simple catalytically relevant aldimines allows for an unprecedented asymmetric α-hydroxylation reaction of β-ketoesters using H2O2. The reaction proceeds via in situ formation of a hypervalent iodine species, which then reacts with the used aldimine to generate an activated electrophilic oxygen transfer reagent.
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Affiliation(s)
- Christopher Mairhofer
- Institute of Organic Chemistry, Johannes Kepler University Linz, Altenbergerstr. 69, 4040 Linz, Austria
| | | | - Mario Waser
- Institute of Organic Chemistry, Johannes Kepler University Linz, Altenbergerstr. 69, 4040 Linz, Austria
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25
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Abstract
Intermolecular haloesterification is an important class of transformations. The resulting products are valuable building blocks. However, it is often necessary to use super-stoichiometric amount of acid in order to compensate the low reactivity. Herein, we report a zwitterion-catalyzed intermolecular bromoesterification using acid and olefin in an equimolar ratio. Mechanistic study revealed that the charge pair in the zwitterion works synergistically in activating both NBS and carboxylic acid.
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Affiliation(s)
- Wing-Hin Ng
- Department of Chemistry and State Key Laboratory of Synthetic Chemistry, The Chinese University of Hong Kong, Shatin, New Territories, Hong Kong, China
| | - Rong-Bin Hu
- Department of Chemistry and State Key Laboratory of Synthetic Chemistry, The Chinese University of Hong Kong, Shatin, New Territories, Hong Kong, China
| | - Ying-Pong Lam
- Department of Chemistry and State Key Laboratory of Synthetic Chemistry, The Chinese University of Hong Kong, Shatin, New Territories, Hong Kong, China
| | - Ying-Yeung Yeung
- Department of Chemistry and State Key Laboratory of Synthetic Chemistry, The Chinese University of Hong Kong, Shatin, New Territories, Hong Kong, China
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26
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Lu D, Liu X, Wu J, Zhang S, Tan J, Yu X, Wang T. Asymmetric Construction of Bispiro‐Cyclopropane‐Pyrazolones via a [2+1] Cyclization Reaction by Dipeptide‐Based Phosphonium Salt Catalysis. Adv Synth Catal 2020. [DOI: 10.1002/adsc.202000073] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Affiliation(s)
- Dongming Lu
- Key Laboratory of Green Chemistry & Technology of Ministry of Education, College of ChemistrySichuan University Chengdu 610064 People's Republic of China
| | - Xin Liu
- Key Laboratory of Green Chemistry & Technology of Ministry of Education, College of ChemistrySichuan University Chengdu 610064 People's Republic of China
| | - Jia‐Hong Wu
- Key Laboratory of Green Chemistry & Technology of Ministry of Education, College of ChemistrySichuan University Chengdu 610064 People's Republic of China
| | - Song Zhang
- Key Laboratory of Green Chemistry & Technology of Ministry of Education, College of ChemistrySichuan University Chengdu 610064 People's Republic of China
| | - Jian‐Ping Tan
- Key Laboratory of Green Chemistry & Technology of Ministry of Education, College of ChemistrySichuan University Chengdu 610064 People's Republic of China
| | - Xiaojun Yu
- Key Laboratory of Green Chemistry & Technology of Ministry of Education, College of ChemistrySichuan University Chengdu 610064 People's Republic of China
- Department of Chemistry, School of Basic Medical SciencesSouthwest Medical University Luzhou 646000 People's Republic of China
| | - Tianli Wang
- Key Laboratory of Green Chemistry & Technology of Ministry of Education, College of ChemistrySichuan University Chengdu 610064 People's Republic of China
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27
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Eitzinger A, Brière JF, Cahard D, Waser M. Enantioselective catalytic synthesis of α-aryl-α-SCF 3-β 2,2-amino acids. Org Biomol Chem 2020; 18:405-408. [PMID: 31915785 PMCID: PMC6989214 DOI: 10.1039/c9ob02666e] [Citation(s) in RCA: 17] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
We herein report a novel entry towards chiral α-SCF3-β2,2-amino acids by carrying out the ammonium salt-catalyzed α-trifluoromethylthiolation of isoxazolidin-5-ones. This approach allowed for high enantioselectivities and high yields and the obtained heterocycles proved to be versatile platforms to access other targets of potential interest.
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Affiliation(s)
- Andreas Eitzinger
- Johannes Kepler University Linz, Institute of Organic Chemistry, Altenbergerstraße 69, 4040 Linz, Austria
| | | | - Dominique Cahard
- CNRS, UMR 6014 COBRA, Normandie Univ, UNIROUEN, INSA Rouen, 76000 Rouen, France
| | - Mario Waser
- Johannes Kepler University Linz, Institute of Organic Chemistry, Altenbergerstraße 69, 4040 Linz, Austria
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28
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Du M, Yu L, Du T, Li Z, Luo Y, Meng X, Tian Z, Zheng C, Cao W, Zhao G. N-Protecting group tuning of the enantioselectivity in Strecker reactions of trifluoromethyl ketimines to synthesize quaternary α-trifluoromethyl amino nitriles by ion pair catalysis. Chem Commun (Camb) 2020; 56:1581-1584. [PMID: 31934692 DOI: 10.1039/c9cc09151c] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
An enantioselective Strecker reaction to construct trifluoromethylated quaternary stereocenters with N-PMP and unexplored N-Boc trifluoromethyl ketimines catalyzed using an organophosphine dual-reagent catalyst has been developed. The enantioselectivities of the corresponding products with the same catalyst could be switched by using different N-protecting groups (N-PMP or N-Boc). The trifluoromethyl amino nitriles were obtained in high yield and high enantioselectivity in a short time and could be easily converted to a variety of useful trifluoromethyl-containing compounds.
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Affiliation(s)
- Mengyuan Du
- Department of Chemistry, Innovative Drug Research Center, Shanghai University, Shanghai 200444, P. R. China.
| | - Longhui Yu
- Key Laboratory of Synthetic Chemistry of Natural Substances, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, 345 Lingling Road, Shanghai 200032, P. R. China.
| | - Ting Du
- Key Laboratory of Synthetic Chemistry of Natural Substances, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, 345 Lingling Road, Shanghai 200032, P. R. China.
| | - Zhaokun Li
- Key Laboratory of Synthetic Chemistry of Natural Substances, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, 345 Lingling Road, Shanghai 200032, P. R. China.
| | - Yueyang Luo
- Key Laboratory of Synthetic Chemistry of Natural Substances, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, 345 Lingling Road, Shanghai 200032, P. R. China.
| | - Xiangyu Meng
- Key Laboratory of Synthetic Chemistry of Natural Substances, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, 345 Lingling Road, Shanghai 200032, P. R. China.
| | - Zhengtao Tian
- Key Laboratory of Synthetic Chemistry of Natural Substances, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, 345 Lingling Road, Shanghai 200032, P. R. China.
| | - Changwu Zheng
- School of Pharmacy, Shanghai University of Traditional Chinese Medicine, Shanghai 201203, China.
| | - Weiguo Cao
- Department of Chemistry, Innovative Drug Research Center, Shanghai University, Shanghai 200444, P. R. China.
| | - Gang Zhao
- Key Laboratory of Synthetic Chemistry of Natural Substances, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, 345 Lingling Road, Shanghai 200032, P. R. China.
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29
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Yan CX, Yang FL, Lu K, Yang X, Zhou PP, Shao X. A semipinacol rearrangement of vinylogous α-ketol cocatalyzed by a cinchona-based primary amine and N-Boc-phenylglycines: mechanisms, roles of catalysts and the origin of enantioselectivity. Org Chem Front 2020. [DOI: 10.1039/d0qo00506a] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
A semipinacol rearrangement of vinylogous α-ketol cocatalyzed by a cinchona-based primary amine and Brønsted acids can be achieved with good enantiocontrol, and theoretical investigations have been performed to uncover and understand it in detail.
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Affiliation(s)
- Chao-Xian Yan
- State Key Laboratory of Applied Organic Chemistry
- Key Laboratory of Special Function Materials and Structure Design of Ministry of Education
- Advanced Catalysis Center
- College of Chemistry and Chemical Engineering
- Lanzhou University
| | - Fang-Ling Yang
- State Key Laboratory of Applied Organic Chemistry
- Key Laboratory of Special Function Materials and Structure Design of Ministry of Education
- Advanced Catalysis Center
- College of Chemistry and Chemical Engineering
- Lanzhou University
| | - Ka Lu
- State Key Laboratory of Applied Organic Chemistry
- Key Laboratory of Special Function Materials and Structure Design of Ministry of Education
- Advanced Catalysis Center
- College of Chemistry and Chemical Engineering
- Lanzhou University
| | - Xing Yang
- State Key Laboratory of Applied Organic Chemistry
- Key Laboratory of Special Function Materials and Structure Design of Ministry of Education
- Advanced Catalysis Center
- College of Chemistry and Chemical Engineering
- Lanzhou University
| | - Pan-Pan Zhou
- State Key Laboratory of Applied Organic Chemistry
- Key Laboratory of Special Function Materials and Structure Design of Ministry of Education
- Advanced Catalysis Center
- College of Chemistry and Chemical Engineering
- Lanzhou University
| | - Xiangfeng Shao
- State Key Laboratory of Applied Organic Chemistry
- Key Laboratory of Special Function Materials and Structure Design of Ministry of Education
- Advanced Catalysis Center
- College of Chemistry and Chemical Engineering
- Lanzhou University
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30
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Eitzinger A, Winter M, Schörgenhumer J, Waser M. Quaternary β 2,2-amino acid derivatives by asymmetric addition of isoxazolidin-5-ones to para-quinone methides. Chem Commun (Camb) 2019; 56:579-582. [PMID: 31830176 DOI: 10.1039/c9cc09239k] [Citation(s) in RCA: 25] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Abstract
The highly enantioselective (>99.5% ee) synthesis of a new class of densely functionalized β2,2-amino acid derivatives by reacting isoxazolidin-5-ones with para-quinone methides in the presence of chiral ammonium salt phase-transfer catalysts was developed. The reaction proceeds with exceptionally low catalyst loadings down to 20 ppm on gram scale and the utilization of the primary addition products towards further manipulations was demonstrated for selected examples.
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Affiliation(s)
- Andreas Eitzinger
- Johannes Kepler University Linz, Institute of Organic Chemistry, Altenbergerstraße 69, 4040 Linz, Austria. mario.waser@jku
| | - Michael Winter
- Johannes Kepler University Linz, Institute of Organic Chemistry, Altenbergerstraße 69, 4040 Linz, Austria. mario.waser@jku
| | - Johannes Schörgenhumer
- Johannes Kepler University Linz, Institute of Organic Chemistry, Altenbergerstraße 69, 4040 Linz, Austria. mario.waser@jku
| | - Mario Waser
- Johannes Kepler University Linz, Institute of Organic Chemistry, Altenbergerstraße 69, 4040 Linz, Austria. mario.waser@jku
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31
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Zhu Z, Odagi M, Zhao C, Abboud KA, Kirm HU, Saame J, Lõkov M, Leito I, Seidel D. Highly Acidic Conjugate‐Base‐Stabilized Carboxylic Acids Catalyze Enantioselective oxa‐Pictet–Spengler Reactions with Ketals. Angew Chem Int Ed Engl 2019. [DOI: 10.1002/ange.201912677] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Affiliation(s)
- Zhengbo Zhu
- Center for Heterocyclic Compounds Department of Chemistry University of Florida Gainesville FL 32611 USA
| | - Minami Odagi
- Center for Heterocyclic Compounds Department of Chemistry University of Florida Gainesville FL 32611 USA
- Department of Biotechnology and Life Science, Graduate School of Technology Tokyo University of Agriculture and Technology 2-24-16, Naka-cho, Koganei city 184-8588 Tokyo Japan
| | - Chenfei Zhao
- Department of Chemistry and Chemical Biology, Rutgers The State University of New Jersey Piscataway NJ 08854 USA
| | - Khalil A. Abboud
- Center for X-ray Crystallography Department of Chemistry University of Florida Gainesville FL 32611 USA
| | | | - Jaan Saame
- Institute of Chemistry University of Tartu Tartu Estonia
| | - Märt Lõkov
- Institute of Chemistry University of Tartu Tartu Estonia
| | - Ivo Leito
- Institute of Chemistry University of Tartu Tartu Estonia
| | - Daniel Seidel
- Center for Heterocyclic Compounds Department of Chemistry University of Florida Gainesville FL 32611 USA
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32
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Zhu Z, Odagi M, Zhao C, Abboud KA, Kirm HU, Saame J, Lõkov M, Leito I, Seidel D. Highly Acidic Conjugate‐Base‐Stabilized Carboxylic Acids Catalyze Enantioselective oxa‐Pictet–Spengler Reactions with Ketals. Angew Chem Int Ed Engl 2019; 59:2028-2032. [DOI: 10.1002/anie.201912677] [Citation(s) in RCA: 23] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/03/2019] [Revised: 11/07/2019] [Indexed: 12/12/2022]
Affiliation(s)
- Zhengbo Zhu
- Center for Heterocyclic Compounds Department of Chemistry University of Florida Gainesville FL 32611 USA
| | - Minami Odagi
- Center for Heterocyclic Compounds Department of Chemistry University of Florida Gainesville FL 32611 USA
- Department of Biotechnology and Life Science, Graduate School of Technology Tokyo University of Agriculture and Technology 2-24-16, Naka-cho, Koganei city 184-8588 Tokyo Japan
| | - Chenfei Zhao
- Department of Chemistry and Chemical Biology, Rutgers The State University of New Jersey Piscataway NJ 08854 USA
| | - Khalil A. Abboud
- Center for X-ray Crystallography Department of Chemistry University of Florida Gainesville FL 32611 USA
| | | | - Jaan Saame
- Institute of Chemistry University of Tartu Tartu Estonia
| | - Märt Lõkov
- Institute of Chemistry University of Tartu Tartu Estonia
| | - Ivo Leito
- Institute of Chemistry University of Tartu Tartu Estonia
| | - Daniel Seidel
- Center for Heterocyclic Compounds Department of Chemistry University of Florida Gainesville FL 32611 USA
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33
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Direct Addition of Amides to Glycals Enabled by Solvation‐Insusceptible 2‐Haloazolium Salt Catalysis. Angew Chem Int Ed Engl 2019. [DOI: 10.1002/ange.201907129] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
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34
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Nakatsuji Y, Kobayashi Y, Takemoto Y. Direct Addition of Amides to Glycals Enabled by Solvation-Insusceptible 2-Haloazolium Salt Catalysis. Angew Chem Int Ed Engl 2019; 58:14115-14119. [PMID: 31392793 DOI: 10.1002/anie.201907129] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/07/2019] [Revised: 07/24/2019] [Indexed: 01/12/2023]
Abstract
The direct 2-deoxyglycosylation of nucleophiles with glycals leads to biologically and pharmacologically important 2-deoxysugar compounds. Although the direct addition of hydroxyl and sulfonamide groups have been well developed, the direct 2-deoxyglycosylation of amide groups has not been reported to date. Herein, we show the first direct 2-deoxyglycosylation of amide groups using a newly designed Brønsted acid catalyst under mild conditions. Through mechanistic investigations, we discovered that the amide group can inhibit acid catalysts, and the inhibition has made the 2-deoxyglycosylation reaction difficult. Diffusion-ordered two-dimensional NMR spectroscopy analysis implied that the 2-chloroazolium salt catalyst was less likely to form aggregates with amides in comparison to other acid catalysts. The chlorine atom and the extended π-scaffold of the catalyst played a crucial role for this phenomenon. This relative insusceptibility to inhibition by amides is more responsible for the catalytic activity than the strength of the acidity.
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Affiliation(s)
- Yuya Nakatsuji
- Graduate School of Pharmaceutical Sciences, Kyoto University, 46-29 Shimoadachi-cho, Yoshida, Sakyo-ku, Kyoto, 606-8501, Japan
| | - Yusuke Kobayashi
- Graduate School of Pharmaceutical Sciences, Kyoto University, 46-29 Shimoadachi-cho, Yoshida, Sakyo-ku, Kyoto, 606-8501, Japan
| | - Yoshiji Takemoto
- Graduate School of Pharmaceutical Sciences, Kyoto University, 46-29 Shimoadachi-cho, Yoshida, Sakyo-ku, Kyoto, 606-8501, Japan
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35
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Wang C, Chen YH, Wu HC, Wang C, Liu YK. The Quinary Catalyst-Substrate Complex Induced Construction of Spiro-Bridged or Cagelike Polyheterocyclic Compounds via a Substrate-Controlled Cascade Process. Org Lett 2019; 21:6750-6755. [PMID: 31433194 DOI: 10.1021/acs.orglett.9b02375] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
The asymmetric organocatalytic cascade reaction of cyclic β-oxo aldehydes to 2-hydroxycinnamaldehydes is developed. The bifunctional tertiary amine-thiourea catalyst was used in a rationally designed multiple catalysis where the asymmetric iminium catalysis and thiourea anion-binding catalysis were combined by carboxylate anion as a ternary catalytic system to form a quinary catalyst-substrate complex, providing an efficient protocol for the construction of enantioenriched spiro-bridged or cagelike polyheterocyclic compounds. The reuse of catalysts was also successfully realized.
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Affiliation(s)
- Chen Wang
- Key Laboratory of Marine Drugs, Chinese Ministry of Education, School of Medicine and Pharmacy, Ocean University of China, Qingdao 266003, China
| | - Ying-Han Chen
- Key Laboratory of Marine Drugs, Chinese Ministry of Education, School of Medicine and Pharmacy, Ocean University of China, Qingdao 266003, China
| | - Hui-Chun Wu
- Key Laboratory of Marine Drugs, Chinese Ministry of Education, School of Medicine and Pharmacy, Ocean University of China, Qingdao 266003, China
| | - Cong Wang
- Key Laboratory of Marine Drugs, Chinese Ministry of Education, School of Medicine and Pharmacy, Ocean University of China, Qingdao 266003, China
| | - Yan-Kai Liu
- Key Laboratory of Marine Drugs, Chinese Ministry of Education, School of Medicine and Pharmacy, Ocean University of China, Qingdao 266003, China.,Laboratory for Marine Drugs and Bioproducts of Qingdao National Laboratory for Marine Science and Technology, Qingdao 266003, China
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36
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Xu YN, Zhu MZ, Lin YK, Tian SK. Palladium-Catalyzed Highly Regioselective Aromatic Substitution of Benzylic Ammonium Salts with Amines. Org Lett 2019; 21:7169-7173. [DOI: 10.1021/acs.orglett.9b02820] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Ya-Nan Xu
- Hefei National Laboratory for Physical Sciences at the Microscale, Center for Excellence in Molecular Synthesis, and Department of Chemistry, University of Science and Technology of China, Hefei, Anhui 230026, China
| | - Meng-Zeng Zhu
- Hefei National Laboratory for Physical Sciences at the Microscale, Center for Excellence in Molecular Synthesis, and Department of Chemistry, University of Science and Technology of China, Hefei, Anhui 230026, China
| | - Yu-Kun Lin
- Hefei National Laboratory for Physical Sciences at the Microscale, Center for Excellence in Molecular Synthesis, and Department of Chemistry, University of Science and Technology of China, Hefei, Anhui 230026, China
| | - Shi-Kai Tian
- Hefei National Laboratory for Physical Sciences at the Microscale, Center for Excellence in Molecular Synthesis, and Department of Chemistry, University of Science and Technology of China, Hefei, Anhui 230026, China
- Key Laboratory of Synthetic Chemistry of Natural Substances, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, Shanghai 200032, China
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37
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Mahto P, Rana NK, Shukla K, Das BG, Joshi H, Singh VK. Asymmetric Multifunctional Modular Organocatalysis: One-Pot Direct Strategy to Enantiopure α,β-Disubstituted γ-Butyrolactones. Org Lett 2019; 21:5962-5966. [PMID: 31322898 DOI: 10.1021/acs.orglett.9b02094] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
A simple and efficient approach to enantioenriched α,β-disubstituted γ-butyrolactones has been developed through multifunctional modular organocatalysis in a highly enantioselective (>99% ee) and diastereoselective (>30:1) manner following a one-pot sequential Michael-hemiacetalization-oxidation reaction. The catalytic process has great substrate compatibility, and the products have been transformed to synthetically useful molecules. The methodology has also been applied to the formal synthesis of (+)-Pilocarpine.
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Affiliation(s)
- Pratibha Mahto
- Department of Chemistry , Indian Institute of Technology Kanpur , Kanpur - 208 016 , UP , India
| | - Nirmal K Rana
- Department of Chemistry , Indian Institute of Technology Jodhpur , Jodhpur - 342 037 , Rajasthan , India
| | - Khyati Shukla
- Department of Chemistry , Indian Institute of Technology Kanpur , Kanpur - 208 016 , UP , India
| | - Braja G Das
- Department of Chemistry , Indian Institute of Technology Kanpur , Kanpur - 208 016 , UP , India
| | - Harshit Joshi
- Department of Chemistry , Indian Institute of Technology Kanpur , Kanpur - 208 016 , UP , India
| | - Vinod K Singh
- Department of Chemistry , Indian Institute of Technology Kanpur , Kanpur - 208 016 , UP , India
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38
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Lam YP, Wang X, Tan F, Ng WH, Tse YLS, Yeung YY. Amide/Iminium Zwitterionic Catalysts for (Trans)esterification: Application in Biodiesel Synthesis. ACS Catal 2019. [DOI: 10.1021/acscatal.9b01959] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Affiliation(s)
- Ying-Pong Lam
- Department of Chemistry, The Chinese University of Hong Kong, Shatin, NT, Hong Kong, China
| | - Xinyan Wang
- Department of Chemistry, The Chinese University of Hong Kong, Shatin, NT, Hong Kong, China
| | - Fei Tan
- Department of Chemistry, The Chinese University of Hong Kong, Shatin, NT, Hong Kong, China
| | - Wing-Hin Ng
- Department of Chemistry, The Chinese University of Hong Kong, Shatin, NT, Hong Kong, China
| | - Ying-Lung Steve Tse
- Department of Chemistry, The Chinese University of Hong Kong, Shatin, NT, Hong Kong, China
| | - Ying-Yeung Yeung
- Department of Chemistry, The Chinese University of Hong Kong, Shatin, NT, Hong Kong, China
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39
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Dong K, Sun Q, Tang Y, Shan C, Aguila B, Wang S, Meng X, Ma S, Xiao FS. Bio-inspired creation of heterogeneous reaction vessels via polymerization of supramolecular ion pair. Nat Commun 2019; 10:3059. [PMID: 31296873 PMCID: PMC6624306 DOI: 10.1038/s41467-019-11080-5] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/19/2019] [Accepted: 06/21/2019] [Indexed: 12/12/2022] Open
Abstract
Precise control of the outer-sphere environment around the active sites of heterogeneous catalysts to modulate the catalytic outcomes has long been a challenge. Here, we demonstrate how this can be fulfilled by encapsulating catalytic components into supramolecular capsules, used as building blocks for materials synthesis, whereby the microenvironment of each active site is tuned by the assembled wall. Specifically, using a cationic template equipped with a polymerizable functionality, anionic ligands can be encapsulated by ion pair-directed supramolecular assembly, followed by construction into porous frameworks. The hydrophilic ionic wall enables reactions to be achieved in water that usually requires organic solvents and also facilitates the enrichment of the substrate into the hydrophobic pocket, leading to superior catalytic performances as demonstrated by the industrially relevant hydroformylation. Remarkably, the formation of the supramolecular assembly and catalyst encapsulation further engenders reaction selectivity, which reaches an even greater extent after construction of the porous framework. Tuning the environment of catalytic active sites may improve the selectivity of heterogeneous catalysts. Here, the authors modify the outer-sphere environment of active sites in hydroformylation catalysts by encapsulating the active sites in nanovessels formed by ion pair-directed supramolecular assembly.
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Affiliation(s)
- Ke Dong
- Key Lab of Applied Chemistry of Zhejiang Province, Zhejiang University, 310028, Hangzhou, China
| | - Qi Sun
- College of Chemical and Biological Engineering, Zhejiang University, 310027, Hangzhou, China.
| | - Yongquan Tang
- Key Lab of Applied Chemistry of Zhejiang Province, Zhejiang University, 310028, Hangzhou, China
| | - Chuan Shan
- Department of Chemistry, University of South Florida, Tampa, FL, 33620, USA
| | - Briana Aguila
- Department of Chemistry, University of South Florida, Tampa, FL, 33620, USA
| | - Sai Wang
- Key Lab of Applied Chemistry of Zhejiang Province, Zhejiang University, 310028, Hangzhou, China
| | - Xiangju Meng
- Key Lab of Applied Chemistry of Zhejiang Province, Zhejiang University, 310028, Hangzhou, China
| | - Shengqian Ma
- Department of Chemistry, University of South Florida, Tampa, FL, 33620, USA.
| | - Feng-Shou Xiao
- Key Lab of Applied Chemistry of Zhejiang Province, Zhejiang University, 310028, Hangzhou, China.
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40
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Collar AG, Trujillo C, Connon SJ. Highly Enantio- and Diastereoselective Catalytic Asymmetric Tamura Cycloaddition Reactions. Chemistry 2019; 25:7270-7274. [PMID: 31050071 DOI: 10.1002/chem.201900119] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/08/2019] [Indexed: 12/22/2022]
Abstract
The first broad-scope catalytic asymmetric Tamura cycloaddition reactions are reported. Under the influence of anion-binding bifunctional catalysis a wide range of α,β-unsaturated N-trityl imines undergo reactions with enolisable anhydrides to form highly synthetically useful α-tetralone structures with excellent enantio- and -diastereocontrol. In stark contrast to the previous literature benchmarks, doubly activated or highly electron deficient alkenes are not required. A facile two-step, high yielding sequence can convert the cycloadducts to α-haloketones (challenging to generate catalytically by other means) with the net formation of two new C-C bonds and three new contiguous stereocentres with exquisite stereocontrol. A DFT study has provided insight into the catalyst mode of action and the origins of the observed enantiocontrol.
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Affiliation(s)
- Aarón Gutiérrez Collar
- School of Chemistry Trinity Biomedical Sciences Institute, Trinity College Dublin, 152-160 Pearse Street, Dublin, 2, Ireland
| | - Cristina Trujillo
- School of Chemistry Trinity Biomedical Sciences Institute, Trinity College Dublin, 152-160 Pearse Street, Dublin, 2, Ireland
| | - Stephen J Connon
- School of Chemistry Trinity Biomedical Sciences Institute, Trinity College Dublin, 152-160 Pearse Street, Dublin, 2, Ireland
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41
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Collar AG, Trujillo C, Lockett-Walters B, Twamley B, Connon SJ. Catalytic Asymmetric γ-Lactam Synthesis from Enolisable Anhydrides and Imines. Chemistry 2019; 25:7275-7279. [PMID: 31050082 DOI: 10.1002/chem.201901028] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/05/2019] [Indexed: 01/18/2023]
Abstract
An anion-binding approach to the problem of preparing enantioenriched γ-lactams from enolisable anhydrides and imines is reported. A simple bisurea catalyst promotes the cycloaddition between α-aryl succinic anhydrides and either PMP- or benzhydryl-protected aldimines to provide γ-lactams with two contiguous stereocentres (one quaternary) with complete diastereocontrol and high to excellent enantioselectivity for the first time. A DFT study has provided insight into the catalyst mode of action and the origins of the observed stereocontrol.
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Affiliation(s)
- Aarón Gutiérrez Collar
- School of Chemistry Trinity Biomedical Sciences Institute, Trinity College Dublin, 152-160 Pearse Street, Dublin 2, Ireland
| | - Cristina Trujillo
- School of Chemistry Trinity Biomedical Sciences Institute, Trinity College Dublin, 152-160 Pearse Street, Dublin 2, Ireland
| | - Bruce Lockett-Walters
- School of Chemistry Trinity Biomedical Sciences Institute, Trinity College Dublin, 152-160 Pearse Street, Dublin 2, Ireland
| | - Brendan Twamley
- School of Chemistry Trinity Biomedical Sciences Institute, Trinity College Dublin, 152-160 Pearse Street, Dublin 2, Ireland
| | - Stephen J Connon
- School of Chemistry Trinity Biomedical Sciences Institute, Trinity College Dublin, 152-160 Pearse Street, Dublin 2, Ireland
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42
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Asymmetric aza-Henry reaction of fluoromethylated imines catalyzed by cinchona-derived bifunctional thiourea. Tetrahedron 2019. [DOI: 10.1016/j.tet.2018.12.055] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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43
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Sun H, Li Y, Liu W, Zheng Y, He Z. Organocatalytic asymmetric cascade cyclization reaction of o-hydroxy cinnamaldehydes with diphenylphosphine oxide. CHINESE CHEM LETT 2018. [DOI: 10.1016/j.cclet.2018.01.026] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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44
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Uraguchi D, Ooi T. Chemistry of Ammonium Betaines: Application to Ion-Pair Catalysis for Selective Organic Transformations. J SYN ORG CHEM JPN 2018. [DOI: 10.5059/yukigoseikyokaishi.76.1144] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Daisuke Uraguchi
- Institute of Transformative Bio-Molecules (WPI-ITbM) and Department of Molecular and Macromolecular Chemistry, Graduate School of Engineering, Nagoya University
| | - Takashi Ooi
- Institute of Transformative Bio-Molecules (WPI-ITbM) and Department of Molecular and Macromolecular Chemistry, Graduate School of Engineering, Nagoya University
- CREST, Japan Science and Technology Agency (JST), Nagoya University
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45
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Odagi M, Araki H, Min C, Yamamoto E, Emge TJ, Yamanaka M, Seidel D. Insights into the Structure and Function of a Chiral Conjugate‐Base‐Stabilized Brønsted Acid Catalyst. European J Org Chem 2018. [DOI: 10.1002/ejoc.201801024] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Affiliation(s)
- Minami Odagi
- Center for Heterocyclic Compounds Department of Chemistry University of Florida 32611 Gainesville Florida USA
| | - Hiroshi Araki
- Department of Chemistry and Chemical Biology of Rutgers The State University of New Jersey 08854 Piscataway NJ USA
| | - Chang Min
- Department of Chemistry and Chemical Biology of Rutgers The State University of New Jersey 08854 Piscataway NJ USA
| | - Eri Yamamoto
- Department of Chemistry Faculty of Science Rikkyo University 3‐34‐1 Nishi‐Ikebukuro 171‐8501 Toshima‐ku Tokyo Japan
| | - Thomas J. Emge
- Department of Chemistry and Chemical Biology of Rutgers The State University of New Jersey 08854 Piscataway NJ USA
| | - Masahiro Yamanaka
- Department of Chemistry Faculty of Science Rikkyo University 3‐34‐1 Nishi‐Ikebukuro 171‐8501 Toshima‐ku Tokyo Japan
| | - Daniel Seidel
- Center for Heterocyclic Compounds Department of Chemistry University of Florida 32611 Gainesville Florida USA
- Department of Chemistry and Chemical Biology of Rutgers The State University of New Jersey 08854 Piscataway NJ USA
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46
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Tang CK, Zhou ZY, Xia AB, Bai L, Liu J, Xu DQ, Xu ZY. Combining Organocatalysis and Iodine Catalysis: One-Pot Sequential Catalytic Synthesis of Chiral Spirodihydrobenzofuran Pyrazolones and Spirodihydrobenzofuran Oxindoles. Org Lett 2018; 20:5840-5844. [DOI: 10.1021/acs.orglett.8b02525] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Cheng-Ke Tang
- Catalytic Hydrogenation Research Centre, State Key Laboratory Breeding Base of Green Chemistry-Synthesis Technology, Zhejiang University of Technology, Hangzhou, 310014, China
| | - Zhan-Yu Zhou
- Catalytic Hydrogenation Research Centre, State Key Laboratory Breeding Base of Green Chemistry-Synthesis Technology, Zhejiang University of Technology, Hangzhou, 310014, China
| | - Ai-Bao Xia
- Catalytic Hydrogenation Research Centre, State Key Laboratory Breeding Base of Green Chemistry-Synthesis Technology, Zhejiang University of Technology, Hangzhou, 310014, China
| | - Liang Bai
- Catalytic Hydrogenation Research Centre, State Key Laboratory Breeding Base of Green Chemistry-Synthesis Technology, Zhejiang University of Technology, Hangzhou, 310014, China
| | - Jie Liu
- Catalytic Hydrogenation Research Centre, State Key Laboratory Breeding Base of Green Chemistry-Synthesis Technology, Zhejiang University of Technology, Hangzhou, 310014, China
| | - Dan-Qian Xu
- Catalytic Hydrogenation Research Centre, State Key Laboratory Breeding Base of Green Chemistry-Synthesis Technology, Zhejiang University of Technology, Hangzhou, 310014, China
| | - Zhen-Yuan Xu
- Catalytic Hydrogenation Research Centre, State Key Laboratory Breeding Base of Green Chemistry-Synthesis Technology, Zhejiang University of Technology, Hangzhou, 310014, China
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47
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Sulfinate-Organocatalyzed (3+2) Annulation Reaction of Propargyl or Allenyl Sulfones with Activated Imines. European J Org Chem 2018. [DOI: 10.1002/ejoc.201800749] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
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48
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Gujjarappa R, Maity SK, Hazra CK, Vodnala N, Dhiman S, Kumar A, Beifuss U, Malakar CC. Divergent Synthesis of Quinazolines Using Organocatalytic Domino Strategies under Aerobic Conditions. European J Org Chem 2018. [DOI: 10.1002/ejoc.201800746] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
Affiliation(s)
- Raghuram Gujjarappa
- Department of Chemistry; National Institute of Technology Manipur; 795004 Langol, Imphal Manipur India
| | - Suvik K. Maity
- Department of Chemistry; National Institute of Technology Manipur; 795004 Langol, Imphal Manipur India
| | - Chinmoy K. Hazra
- Department of Chemistry; Korea Advanced Institute of Science & Technology (KAIST); 34141 Daejeon 305 - 701 South Korea
| | - Nagaraju Vodnala
- Department of Chemistry; National Institute of Technology Manipur; 795004 Langol, Imphal Manipur India
| | - Shiv Dhiman
- Department of Chemistry; BITS Pilani; Pilani Campus 333031 Pilani Rajasthan India
| | - Anil Kumar
- Department of Chemistry; BITS Pilani; Pilani Campus 333031 Pilani Rajasthan India
| | - Uwe Beifuss
- Institut für Chemie; Universität Hohenheim; Garbenstr. 30 70599 Stuttgart Germany
| | - Chandi C. Malakar
- Department of Chemistry; National Institute of Technology Manipur; 795004 Langol, Imphal Manipur India
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49
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Chen SK, Ma WQ, Yan ZB, Zhang FM, Wang SH, Tu YQ, Zhang XM, Tian JM. Organo-Cation Catalyzed Asymmetric Homo/Heterodialkylation of Bisoxindoles: Construction of Vicinal All-Carbon Quaternary Stereocenters and Total Synthesis of (−)-Chimonanthidine. J Am Chem Soc 2018; 140:10099-10103. [DOI: 10.1021/jacs.8b05386] [Citation(s) in RCA: 70] [Impact Index Per Article: 11.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Affiliation(s)
- Si-Kai Chen
- State Key Laboratory of Applied Organic Chemistry & College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou 730000, P.R. China
| | - Wen-Qiang Ma
- State Key Laboratory of Applied Organic Chemistry & College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou 730000, P.R. China
| | - Zhi-Bo Yan
- State Key Laboratory of Applied Organic Chemistry & College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou 730000, P.R. China
| | - Fu-Min Zhang
- State Key Laboratory of Applied Organic Chemistry & College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou 730000, P.R. China
| | - Shao-Hua Wang
- State Key Laboratory of Applied Organic Chemistry & College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou 730000, P.R. China
| | - Yong-Qiang Tu
- State Key Laboratory of Applied Organic Chemistry & College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou 730000, P.R. China
- School of Chemistry and Chemical Engineering, Shanghai Jiao Tong University, Shanghai 200240, P.R. China
| | - Xiao-Ming Zhang
- State Key Laboratory of Applied Organic Chemistry & College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou 730000, P.R. China
| | - Jin-Miao Tian
- School of Chemistry and Chemical Engineering, Shanghai Jiao Tong University, Shanghai 200240, P.R. China
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50
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Hirata G, Maeda H. Pyrrole-Based Anion-Responsive π-Electronic Molecules as Hydrogen-Bonding Catalysts. Org Lett 2018; 20:2853-2856. [DOI: 10.1021/acs.orglett.8b00855] [Citation(s) in RCA: 20] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Goki Hirata
- Department of Applied Chemistry, College of Life Sciences, Ritsumeikan University, Kusatsu 525−8577, Japan
| | - Hiromitsu Maeda
- Department of Applied Chemistry, College of Life Sciences, Ritsumeikan University, Kusatsu 525−8577, Japan
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