1
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Banerjee S, Vanka K. The Role of Aromatic Alcohol Additives on Asymmetric Organocatalysis Reactions: Insights from Theory. Chem Asian J 2024; 19:e202300997. [PMID: 38270228 DOI: 10.1002/asia.202300997] [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: 11/11/2023] [Revised: 01/19/2024] [Accepted: 01/22/2024] [Indexed: 01/26/2024]
Abstract
The presence of an aromatic additive has been seen to enhance, often significantly, the enantioselectivity and yield in asymmetric organocatalysis. Considering their success across a dizzying range of organocatalysts and organic transformations, it would seem unlikely that a common principle exists for their functioning. However, the current investigations with DFT suggest a general principle: the phenolic additive sandwiches itself, through hydrogen bonding and π⋅⋅⋅π stacking, between the organocatalyst coordinated electrophile and nucleophile. This is seen for a wide range of experimentally reported systems. That such complex formation leads to enhanced stereoselectivity is then demonstrated for two cases: the cinchona alkaloid complex (BzCPD), catalysing thiocyanation (2-naphthol additive employed), as well as for L-pipecolicacid catalysing the asymmetric nitroaldol reaction with a range of nitro-substituted phenol additives. These findings, indicating that dual catalysis takes place when phenolic additives are employed, are likely to have a significant impact on the field of asymmetric organocatalysis.
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Affiliation(s)
- Subhrashis Banerjee
- Physical and Materials Chemistry Division, CSIR-National Chemical Laboratory, Dr.Homi Bhabha Road, Pune, 411008, Maharashtra, India
- Academy of Scientific and Innovative Research (AcSIR), Ghaziabad, 201002, India
| | - Kumar Vanka
- Physical and Materials Chemistry Division, CSIR-National Chemical Laboratory, Dr.Homi Bhabha Road, Pune, 411008, Maharashtra, India
- Academy of Scientific and Innovative Research (AcSIR), Ghaziabad, 201002, India
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2
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Kucharski DJ, Suchanek R, Kowalczyk R, Boratyński PJ. Development of Mefloquine-Based Bifunctional Secondary Amine Organocatalysts for Enantioselective Michael and Friedel-Crafts Reactions. J Org Chem 2024; 89:111-123. [PMID: 38069836 DOI: 10.1021/acs.joc.3c01791] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2024]
Abstract
The chiral framework based on 11-aminomefloquine has been utilized for the first time to construct bifunctional organocatalysts. These catalysts demonstrate high enantioselectivity in both Michael additions and Friedel-Crafts reactions across a variety of substrates, achieving up to >99% ee. The distinctive feature is the incorporation of a secondary amine group, offering unique tight hydrogen-bonding capabilities in the protonated state, as supported by DFT computation. The diversity of these organocatalysts suggests their broad applicability across multiple reaction classes.
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Affiliation(s)
- Dawid J Kucharski
- Department of Organic and Medicinal Chemistry, Wrocław University of Technology, Wyb. Wyspiańskiego 26, Wrocław 50-370, Poland
| | - Radosław Suchanek
- Department of Organic and Medicinal Chemistry, Wrocław University of Technology, Wyb. Wyspiańskiego 26, Wrocław 50-370, Poland
| | - Rafał Kowalczyk
- Department of Bioorganic Chemistry Wrocław University of Technology, Wyb. Wyspiańskiego 26, Wrocław 50-370, Poland
| | - Przemysław J Boratyński
- Department of Organic and Medicinal Chemistry, Wrocław University of Technology, Wyb. Wyspiańskiego 26, Wrocław 50-370, Poland
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3
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Toledo-González Y, Sotiropoulos JM, Bécart D, Guichard G, Carbonnière P. Insight into Substrate Recognition by Urea-Based Helical Foldamer Catalysts Using a DFT Global Optimization Approach. J Org Chem 2022; 87:10726-10735. [PMID: 35917494 DOI: 10.1021/acs.joc.2c00562] [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
Peptides and foldamers have recently gained increasing attention as chiral catalysts to achieve challenging (asymmetric) transformations. We previously reported that short helically folded aliphatic oligoureas in combination with achiral Brønsted bases are effective H-bonding catalysts for C-C bond-forming reactions─i.e., the conjugate addition of 1,3-dicarbonyl pronucleophiles to nitroalkenes─with high reactivity and selectivity and at remarkably low chiral catalyst/substrate molar ratios. This theoretical investigation at the density functional theory level of theory, aims to both analyze how the substrates of the reaction interact with the foldamer catalyst and rationalize a chain-length dependence effect on the catalytic properties. We confirm that the first two ureas are the only H-bond donors available to interact with external molecules. Moreover, each urea site interacts with one of the two reactants allowing a short distance between the two reacting carbons, thus facilitating the conjugated addition. Additionally, it was observed that the molecular recognition and catalyst-substrate interactions are mainly governed by electrostatic interactions but not orbital interactions (see from NBO if this is finally true). On these grounds, an electrostatic potential (ESP) analysis showed an important internal charge separation in the catalyst, the positive ESP region being concentrated around the first two ureas, with its area extending as the number of residues increases.
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Affiliation(s)
| | | | - Diane Bécart
- Université Bordeaux, CNRS, Bordeaux INP, CBMN, UMR 5248, Institut Européen de Chimie et Biologie, 2 rue Robert Escarpit, F-33607 Pessac, France
| | - Gilles Guichard
- Université Bordeaux, CNRS, Bordeaux INP, CBMN, UMR 5248, Institut Européen de Chimie et Biologie, 2 rue Robert Escarpit, F-33607 Pessac, France
| | - Philippe Carbonnière
- Université de Pau et des Pays de l'Adour, E2S UPPA, CNRS, IPREM, 5254 Pau, France
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4
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Tokuhiro Y, Yoshikawa K, Murayama S, Nanjo T, Takemoto Y. Highly Stereoselective, Organocatalytic Mannich-type Addition of Glyoxylate Cyanohydrin: A Versatile Building Block for the Asymmetric Synthesis of β-Amino-α-ketoacids. ACS Catal 2022. [DOI: 10.1021/acscatal.2c00950] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Yusuke Tokuhiro
- Graduate School of Pharmaceutical Sciences, Kyoto University, Yoshida,
Sakyo-ku, Kyoto 606-8501, Japan
| | - Kosuke Yoshikawa
- Graduate School of Pharmaceutical Sciences, Kyoto University, Yoshida,
Sakyo-ku, Kyoto 606-8501, Japan
| | - Sei Murayama
- Graduate School of Pharmaceutical Sciences, Kyoto University, Yoshida,
Sakyo-ku, Kyoto 606-8501, Japan
| | - Takeshi Nanjo
- Graduate School of Pharmaceutical Sciences, Kyoto University, Yoshida,
Sakyo-ku, Kyoto 606-8501, Japan
| | - Yoshiji Takemoto
- Graduate School of Pharmaceutical Sciences, Kyoto University, Yoshida,
Sakyo-ku, Kyoto 606-8501, Japan
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5
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Yan J, Zhang W, He Q, Hou J, Zeng H, Wei H, Xie W. Enantioselective direct vinylogous Michael addition for constructing enantioenriched γ,γ-dialkyl substituted butyrolactams and octahydroindoles. Org Biomol Chem 2022; 20:2387-2391. [PMID: 35254368 DOI: 10.1039/d2ob00112h] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A nickel(II)-catalyzed asymmetric direct vinylogous Michael addition of γ-alkyl monosubstituted α,β-unsaturated butyrolactams to α,β-unsaturated carbonyl compounds has been disclosed, affording γ,γ-dialkyl substituted butyrolactams in good yields and satisfactory enantioselectivities. A tandem catalytic asymmetric vinylogous Michael addition/intramolecular Michael addition has also been developed based on this reaction, which enabled the construction of enantioenriched octahydroindoles with three consecutive stereogenic carbon centers.
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Affiliation(s)
- Jiahang Yan
- Shaanxi Key Laboratory of Natural Products & Chemical Biology, College of Chemistry & Pharmacy, Northwest A&F University, 22 Xinong Road, Yangling 712100, Shaanxi, China.
| | - Wenting Zhang
- State Key Laboratory of Stress Biology for Arid Areas, Northwest A&F University, Yangling 712100, Shaanxi, China
| | - Qiaoqiao He
- Shaanxi Key Laboratory of Natural Products & Chemical Biology, College of Chemistry & Pharmacy, Northwest A&F University, 22 Xinong Road, Yangling 712100, Shaanxi, China.
| | - Jun Hou
- Shaanxi Key Laboratory of Natural Products & Chemical Biology, College of Chemistry & Pharmacy, Northwest A&F University, 22 Xinong Road, Yangling 712100, Shaanxi, China.
| | - Hongxin Zeng
- Shaanxi Key Laboratory of Natural Products & Chemical Biology, College of Chemistry & Pharmacy, Northwest A&F University, 22 Xinong Road, Yangling 712100, Shaanxi, China.
| | - Hongbo Wei
- Shaanxi Key Laboratory of Natural Products & Chemical Biology, College of Chemistry & Pharmacy, Northwest A&F University, 22 Xinong Road, Yangling 712100, Shaanxi, China.
| | - Weiqing Xie
- Shaanxi Key Laboratory of Natural Products & Chemical Biology, College of Chemistry & Pharmacy, Northwest A&F University, 22 Xinong Road, Yangling 712100, Shaanxi, China. .,State Key Laboratory of Stress Biology for Arid Areas, Northwest A&F University, Yangling 712100, Shaanxi, China
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6
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Liu S, Chen Z, Chen J, Ni S, Zhang Y, Shi F. Rational Design of Axially Chiral Styrene‐Based Organocatalysts and Their Application in Catalytic Asymmetric (2+4) Cyclizations. Angew Chem Int Ed Engl 2022. [DOI: 10.1002/ange.202112226] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Si‐Jia Liu
- School of Chemistry and Materials Science Key Laboratory of Green Synthetic Chemistry for Functional Materials of Jiangsu Province Jiangsu Normal University Xuzhou 221116 China
| | - Zhi‐Han Chen
- School of Chemistry and Materials Science Key Laboratory of Green Synthetic Chemistry for Functional Materials of Jiangsu Province Jiangsu Normal University Xuzhou 221116 China
| | - Jia‐Yi Chen
- Department of Chemistry Key Laboratory for Preparation and Application of Ordered Structural Materials of Guangdong Province Shantou University Shantou 515063 China
| | - Shao‐Fei Ni
- Department of Chemistry Key Laboratory for Preparation and Application of Ordered Structural Materials of Guangdong Province Shantou University Shantou 515063 China
| | - Yu‐Chen Zhang
- School of Chemistry and Materials Science Key Laboratory of Green Synthetic Chemistry for Functional Materials of Jiangsu Province Jiangsu Normal University Xuzhou 221116 China
| | - Feng Shi
- School of Chemistry and Materials Science Key Laboratory of Green Synthetic Chemistry for Functional Materials of Jiangsu Province Jiangsu Normal University Xuzhou 221116 China
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7
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Tsou YJ, Sathishkumar N, Chen IT, Lee TA, Chen HT, Han JL. Hydrogen-Bond-Donor-Directed Switching of Enantioselectivity in the Vinylogous Aldol-Cyclization Cascade Reaction of Prostereogenic 3-Alkylidene Oxindoles with Isatins and o-Quinones. J Org Chem 2022; 87:2520-2531. [PMID: 35084858 DOI: 10.1021/acs.joc.1c02421] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
In this study, we reported a hydrogen-bond-donor-directed enantiodivergent vinylogous aldol-cyclization cascade reaction of 3-alkylidene oxindoles with isatins and o-quinones. Both enantiomers can be prepared by thiourea or squaramide cinchona alkaloid bifunctional organocatalysts with the same quinine scaffold. Kinetic study data provided the possible reaction mechanism for the vinylogous aldol-cyclization cascade reaction. The DFT calculation data showed the geometry of the generated dienolates from pronucleophiles dominated the observed switch of enantioselectivity.
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Affiliation(s)
- Yun-Jie Tsou
- Department of Chemistry, National Chung Hsing University, Taichung City 40227, Taiwan
| | - Nadaraj Sathishkumar
- Department of Chemistry, Chung Yuan Christian University, Taoyuan City 32023, Taiwan
| | - I-Ting Chen
- Department of Chemistry, National Chung Hsing University, Taichung City 40227, Taiwan
| | - Ting-An Lee
- Department of Chemistry, Chung Yuan Christian University, Taoyuan City 32023, Taiwan
| | - Hsin-Tsung Chen
- Department of Chemistry, Chung Yuan Christian University, Taoyuan City 32023, Taiwan
| | - Jeng-Liang Han
- Department of Chemistry, National Chung Hsing University, Taichung City 40227, Taiwan
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8
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Heard AW, Suárez JM, Goldup SM. Controlling catalyst activity, chemoselectivity and stereoselectivity with the mechanical bond. Nat Rev Chem 2022; 6:182-196. [PMID: 37117433 DOI: 10.1038/s41570-021-00348-4] [Citation(s) in RCA: 37] [Impact Index Per Article: 18.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 11/25/2021] [Indexed: 12/16/2022]
Abstract
Mechanically interlocked molecules, such as rotaxanes and catenanes, are receiving increased attention as scaffolds for the development of new catalysts, driven by both their increasing accessibility and high-profile examples of the mechanical bond delivering desirable behaviours and properties. In this Review, we survey recent advances in the catalytic applications of mechanically interlocked molecules organized by the effect of the mechanical bond on key catalytic properties, namely, activity, chemoselectivity and stereoselectivity, and focus on how the mechanically bonded structure leads to the observed behaviour. Our aim is to inspire future investigations of mechanically interlocked catalysts, including those outside of the supramolecular community.
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9
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Joshi H, Singh VK. Cinchona Derivatives as Bifunctional H‐bonding Organocatalysts in Asymmetric Vinylogous Conjugate Addition Reactions. ASIAN J ORG CHEM 2022. [DOI: 10.1002/ajoc.202100053] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Harshit Joshi
- Department of Chemistry Indian Institute of Technology Kanpur Kanpur-208016 Uttar Pradesh India
| | - Vinod K. Singh
- Department of Chemistry Indian Institute of Technology Kanpur Kanpur-208016 Uttar Pradesh India
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10
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Liu SJ, Chen ZH, Chen JY, Ni SF, Zhang YC, Shi F. Rational Design of Axially Chiral Styrene-Based Organocatalysts and Their Application in Catalytic Asymmetric (2+4) Cyclizations. Angew Chem Int Ed Engl 2021; 61:e202112226. [PMID: 34846087 DOI: 10.1002/anie.202112226] [Citation(s) in RCA: 22] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/08/2021] [Indexed: 12/13/2022]
Abstract
A new class of axially chiral styrene-based thiourea tertiary amine catalysts, which have unique characteristics such as an efficient synthetic route, multiple chiral elements, and multiple activating groups, has been rationally designed. These new chiral catalysts have proven to be efficient organocatalysts, enabling the chemo-, diastereo-, and enantioselective (2+4) cyclization of 2-benzothiazolimines with homophthalic anhydrides in good yields (up to 96 %) with excellent stereoselectivities (all >95:5 dr, up to 98 % ee). More importantly, theoretical calculations elucidated the important role of an axially chiral styrene moiety in controlling both the reactivity and enantioselectivity. This work not only represents the first design of styrene-based chiral thiourea tertiary amine catalysts and the first catalytic asymmetric (2+4) cyclization of 2-benzothiazolimines, but also gives an in-depth understanding of axially chiral styrene-based organocatalysts.
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Affiliation(s)
- Si-Jia Liu
- School of Chemistry and Materials Science, Key Laboratory of Green Synthetic Chemistry for Functional Materials of Jiangsu Province, Jiangsu Normal University, Xuzhou, 221116, China
| | - Zhi-Han Chen
- School of Chemistry and Materials Science, Key Laboratory of Green Synthetic Chemistry for Functional Materials of Jiangsu Province, Jiangsu Normal University, Xuzhou, 221116, China
| | - Jia-Yi Chen
- Department of Chemistry, Key Laboratory for Preparation and Application of Ordered Structural Materials of Guangdong Province, Shantou University, Shantou, 515063, China
| | - Shao-Fei Ni
- Department of Chemistry, Key Laboratory for Preparation and Application of Ordered Structural Materials of Guangdong Province, Shantou University, Shantou, 515063, China
| | - Yu-Chen Zhang
- School of Chemistry and Materials Science, Key Laboratory of Green Synthetic Chemistry for Functional Materials of Jiangsu Province, Jiangsu Normal University, Xuzhou, 221116, China
| | - Feng Shi
- School of Chemistry and Materials Science, Key Laboratory of Green Synthetic Chemistry for Functional Materials of Jiangsu Province, Jiangsu Normal University, Xuzhou, 221116, China
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11
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Deau E, Le Foll A, Fouache C, Corrot E, Bailly L, Levacher V, Marchand P, Querniard F, Bischoff L, Brière JF. Organocatalytic enantioselective synthesis of β-amino sulfonic acid derivatives. Chem Commun (Camb) 2021; 57:8348-8351. [PMID: 34337632 DOI: 10.1039/d1cc03477d] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
An unprecedented enantioselective conjugate addition reaction of sodium bisulfite to various nitrostyrenes occurred upon the influence of a bifunctional amino-thiourea organocatalyst; a strategy that opens a straightforward route to unprotected chiral taurine derivatives thanks to the reduction of the obtained β-nitroethanesulfonic acids into the corresponding amino derivatives.
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Affiliation(s)
- Emmanuel Deau
- Normandie Univ, UNIROUEN, INSA Rouen, CNRS, COBRA, Rouen 76000, France.
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12
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García‐Urricelqui A, Cózar A, Campano TE, Mielgo A, Palomo C. syn
‐Selective Michael Reaction of α‐Branched Aryl Acetaldehydes with Nitroolefins Promoted by Squaric Amino Acid Derived Bifunctional Brønsted Bases. European J Org Chem 2021. [DOI: 10.1002/ejoc.202100355] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Affiliation(s)
- Ane García‐Urricelqui
- Departamento de Química Orgánica I Universidad del País Vasco UPV/EHU Manuel Lardizábal 3 20018 San Sebastián Spain
| | - Abel Cózar
- Departamento de Química Orgánica I Universidad del País Vasco UPV/EHU Manuel Lardizábal 3 20018 San Sebastián Spain
- IKERBASQUE Basque Foundation for Science 48009 Blbao Spain
| | - Teresa E. Campano
- Departamento de Química Orgánica I Universidad del País Vasco UPV/EHU Manuel Lardizábal 3 20018 San Sebastián Spain
| | - Antonia Mielgo
- Departamento de Química Orgánica I Universidad del País Vasco UPV/EHU Manuel Lardizábal 3 20018 San Sebastián Spain
| | - Claudio Palomo
- Departamento de Química Orgánica I Universidad del País Vasco UPV/EHU Manuel Lardizábal 3 20018 San Sebastián Spain
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13
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Non-Covalent Interactions in Enantioselective Organocatalysis: Theoretical and Mechanistic Studies of Reactions Mediated by Dual H-Bond Donors, Bifunctional Squaramides, Thioureas and Related Catalysts. Catalysts 2021. [DOI: 10.3390/catal11050569] [Citation(s) in RCA: 24] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022] Open
Abstract
Chiral bifunctional dual H-bond donor catalysts have become one of the pillars of organocatalysis. They include squaramide, thiosquaramide, thiourea, urea, and even selenourea-based catalysts combined with chiral amines, cinchona alkaloids, sulfides, phosphines and more. They can promote several types of reactions affording products in very high yields and excellent stereoselectivities in many cases: conjugate additions, cycloadditions, the aldol and Henry reactions, the Morita–Baylis–Hilman reaction, even cascade reactions, among others. The desire to understand mechanisms and the quest for the origins of stereoselectivity, in attempts to find guidelines for developing more efficient catalysts for new transformations, has promoted many mechanistic and theoretical studies. In this review, we survey the literature published in this area since 2015.
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Marcantonio E, Curti C, Battistini L, Sartori A, Cardinale L, Pelosi G, Zanardi F. Direct, Asymmetric Synthesis of Carbocycle‐Fused Uracils via [4+2] Cycloadditions: a Noncovalent Organocatalysis Approach. Adv Synth Catal 2021. [DOI: 10.1002/adsc.202100082] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Affiliation(s)
- Enrico Marcantonio
- Dipartimento di Scienze degli Alimenti e del Farmaco Università di Parma Parco Area delle Scienze 27A 43124 Parma Italy
| | - Claudio Curti
- Dipartimento di Scienze degli Alimenti e del Farmaco Università di Parma Parco Area delle Scienze 27A 43124 Parma Italy
| | - Lucia Battistini
- Dipartimento di Scienze degli Alimenti e del Farmaco Università di Parma Parco Area delle Scienze 27A 43124 Parma Italy
| | - Andrea Sartori
- Dipartimento di Scienze degli Alimenti e del Farmaco Università di Parma Parco Area delle Scienze 27A 43124 Parma Italy
| | - Luana Cardinale
- Department of Chemistry University of Hamburg Martin Luther King Platz 6 20146 Hamburg Germany
| | - Giorgio Pelosi
- Dipartimento di Scienze Chimiche, della Vita e della Sostenibilità Ambientale Università di Parma Parco Area delle Scienze 17A 43124 Parma Italy
| | - Franca Zanardi
- Dipartimento di Scienze degli Alimenti e del Farmaco Università di Parma Parco Area delle Scienze 27A 43124 Parma Italy
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15
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García-Urricelqui A, de Cózar A, Mielgo A, Palomo C. Probing α-Amino Aldehydes as Weakly Acidic Pronucleophiles: Direct Access to Quaternary α-Amino Aldehydes by an Enantioselective Michael Addition Catalyzed by Brønsted Bases. Chemistry 2021; 27:2483-2492. [PMID: 33034390 DOI: 10.1002/chem.202004468] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/06/2020] [Indexed: 12/20/2022]
Abstract
The high tendency of α-amino aldehydes to undergo 1,2-additions and their relatively low stability under basic conditions have largely prevented their use as pronucleophiles in the realm of asymmetric catalysis, particularly for the production of quaternary α-amino aldehydes. Herein, it is demonstrated that the chemistry of α-amino aldehydes may be expanded beyond these limits by documenting the first direct α-alkylation of α-branched α-amino aldehydes with nitroolefins. The reaction produces densely functionalized products bearing up to two, quaternary and tertiary, vicinal stereocenters with high diastereo- and enantioselectivity. DFT modeling leads to the proposal that intramolecular hydrogen bonding between the NH group and the carbonyl oxygen atom in the starting α-amino aldehyde is key for reaction stereocontrol.
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Affiliation(s)
- Ane García-Urricelqui
- Departamento de Química Orgánica I, Universidad del País Vasco UPV/EHU, Manuel Lardizábal 3, 20018, San Sebastián, Spain
| | - Abel de Cózar
- Departamento de Química Orgánica I, Universidad del País Vasco UPV/EHU, Manuel Lardizábal 3, 20018, San Sebastián, Spain.,IKERBASQUE, Basque Foundation for Science, 48009, Bilbao, Spain
| | - Antonia Mielgo
- Departamento de Química Orgánica I, Universidad del País Vasco UPV/EHU, Manuel Lardizábal 3, 20018, San Sebastián, Spain
| | - Claudio Palomo
- Departamento de Química Orgánica I, Universidad del País Vasco UPV/EHU, Manuel Lardizábal 3, 20018, San Sebastián, Spain
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16
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Lewis-Atwell T, Townsend PA, Grayson MN. Comparisons of different force fields in conformational analysis and searching of organic molecules: A review. Tetrahedron 2021. [DOI: 10.1016/j.tet.2020.131865] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
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17
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Čmelová P, Vargová D, Šebesta R. Hybrid Peptide-Thiourea Catalyst for Asymmetric Michael Additions of Aldehydes to Heterocyclic Nitroalkenes. J Org Chem 2021; 86:581-592. [PMID: 33258590 DOI: 10.1021/acs.joc.0c02251] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Abstract
Bifunctional organocatalysis combining covalent and noncovalent activation is presented. The hybrid peptide-thiourea catalyst features a N-terminal proline moiety for aldehyde activation and a thiourea unit for electrophile activation. This catalyst effectively promotes asymmetric Michael additions of aldehydes to challenging but biologically relevant heterocycle-containing nitroalkenes. The catalyst can be used under solvent-free conditions. Spectroscopic and density functional theory studies elucidate the catalyst structure and mode of action.
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Affiliation(s)
- Patrícia Čmelová
- Department of Organic Chemistry, Faculty of Natural Sciences, Comenius University in Bratislava, Mlynská dolina, Ilkovičova 6, 842 15 Bratislava, Slovakia
| | - Denisa Vargová
- Department of Organic Chemistry, Faculty of Natural Sciences, Comenius University in Bratislava, Mlynská dolina, Ilkovičova 6, 842 15 Bratislava, Slovakia
| | - Radovan Šebesta
- Department of Organic Chemistry, Faculty of Natural Sciences, Comenius University in Bratislava, Mlynská dolina, Ilkovičova 6, 842 15 Bratislava, Slovakia
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18
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Salehi Marzijarani N, Lam YH, Wang X, Klapars A, Qi J, Song Z, Sherry BD, Liu Z, Ji Y. New Mechanism for Cinchona Alkaloid-Catalysis Allows for an Efficient Thiophosphorylation Reaction. J Am Chem Soc 2020; 142:20021-20029. [PMID: 33180475 DOI: 10.1021/jacs.0c09192] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
An efficient synthesis of nucleoside 5'-monothiophosphates under mild reaction conditions using commercially available thiophosphoryl chloride was achieved with a cinchona alkaloid catalyst. A detailed mechanistic study of the reaction was undertaken, employing a combination of reaction kinetics, NMR spectroscopy, and computational modeling, to better understand the observed reactivity. Taken collectively, the results support an unprecedented mechanism for this class of organocatalyst.
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Affiliation(s)
| | - Yu-Hong Lam
- Department of Computational and Structural Chemistry, Merck & Co., Inc., Rahway, New Jersey 07065, United States
| | - Xiao Wang
- Department of Analytical Research and Development, Merck & Co., Inc., Rahway, New Jersey 07065, United States
| | - Artis Klapars
- Department of Process Research and Development, Merck & Co., Inc., Rahway, New Jersey 07065, United States
| | - Ji Qi
- Department of Process Research and Development, Merck & Co., Inc., Rahway, New Jersey 07065, United States.,Department of Process Research and Development, MSD R&D (China) Co., Ltd., Building 21 Rongda Road, Wangjing R&D Base, Zhongguancun Electronic Zone West Zone, Beijing 100012, China
| | - Zhiyan Song
- Department of Synthetic Chemistry, Pharmaron Beijing Co., Ltd., 6 Taihe Road BDA, Beijing 100176, China
| | - Benjamin D Sherry
- Department of Process Research and Development, Merck & Co., Inc., Rahway, New Jersey 07065, United States
| | - Zhijian Liu
- Department of Process Research and Development, Merck & Co., Inc., Rahway, New Jersey 07065, United States
| | - Yining Ji
- Department of Process Research and Development, Merck & Co., Inc., Rahway, New Jersey 07065, United States
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19
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Ričko S, Izzo JA, Jørgensen KA. Insights on the Pseudo‐Enantiomeric Properties of Bifunctional Cinchona Alkaloid Squaramide‐Derived Organocatalyst. Chemistry 2020; 26:15727-15732. [DOI: 10.1002/chem.202004117] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/10/2020] [Indexed: 12/15/2022]
Affiliation(s)
- Sebastijan Ričko
- Department of Chemistry Aarhus University Langelandsgade 140 8000 Aarhus C Denmark
- Aarhus Institute of Advanced Studies (AIAS) Aarhus University Høegh-Guldbergs Gade 6B 8000 Aarhus C Denmark
- Faculty of Chemistry and Chemical Technology University of Ljubljana Večna pot 113 1000 Ljubljana Slovenia
| | - Joseph A. Izzo
- Department of Chemistry Aarhus University Langelandsgade 140 8000 Aarhus C Denmark
| | - Karl Anker Jørgensen
- Department of Chemistry Aarhus University Langelandsgade 140 8000 Aarhus C Denmark
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20
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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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21
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Murata R, Matsumoto A, Asano K, Matsubara S. Desymmetrization of gem-diols via water-assisted organocatalytic enantio- and diastereoselective cycloetherification. Chem Commun (Camb) 2020; 56:12335-12338. [PMID: 32896841 DOI: 10.1039/d0cc05509c] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
The first desymmetrization of gem-diols forming chiral hemiketal carbons was accomplished via organocatalytic enantio- and diastereoselective cycloetherification, which afforded optically active tetrahydropyrans containing a chiral hemiketal carbon and tetrasubstituted stereocenters bearing synthetically versatile fluorinated groups. The desymmetrization of silanediols was also demonstrated as an asymmetric route to chiral silicon centers.
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Affiliation(s)
- Ryuichi Murata
- Department of Material Chemistry, Graduate School of Engineering, Kyoto University, Kyotodaigaku-Katsura, Nishikyo, Kyoto 615-8510, Japan.
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22
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Zhang Y, Ge J, Luo L, Yan SQ, Lai GW, Mei ZQ, Luo HQ, Fan XL. Difluoroisoxazolacetophenone: A Difluoroalkylation Reagent for Organocatalytic Vinylogous Nitroaldol Reactions of 1,2-Diketones. Org Lett 2020; 22:7952-7957. [PMID: 32991188 DOI: 10.1021/acs.orglett.0c02873] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Difluoroisoxazolacetophenone (DFIO) is developed as a new difluoroalkylation reagent that can be easily prepared from inexpensive starting materials. In situ remote C-C bond cleavage of DFIO affords γ,γ-difluoroisoxazole nitronate that undergoes base-catalyzed vinylogous nitroaldol additions to isatins, benzothiophene-2,3-dione, unsaturated-α-ketoesters, and cyclic 1,2-diketones. This organocatalytic debenzoate vinylogous nitroaldol reaction provides a new and mild approach for the preparation of various difluoroisoxazole-substituted 3-hydroxy-2-oxindoles.
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Affiliation(s)
- Yong Zhang
- Key Laboratory of Organo-pharmaceutical Chemistry, Gannan Normal University, Ganzhou 341000, P.R. China
| | - Jin Ge
- Key Laboratory of Organo-pharmaceutical Chemistry, Gannan Normal University, Ganzhou 341000, P.R. China
| | - Liang Luo
- Key Laboratory of Organo-pharmaceutical Chemistry, Gannan Normal University, Ganzhou 341000, P.R. China
| | - Su-Qiong Yan
- Key Laboratory of Organo-pharmaceutical Chemistry, Gannan Normal University, Ganzhou 341000, P.R. China
| | - Guo-Wei Lai
- Key Laboratory of Organo-pharmaceutical Chemistry, Gannan Normal University, Ganzhou 341000, P.R. China
| | - Zu-Qin Mei
- Key Laboratory of Organo-pharmaceutical Chemistry, Gannan Normal University, Ganzhou 341000, P.R. China
| | - Hai-Qing Luo
- Key Laboratory of Organo-pharmaceutical Chemistry, Gannan Normal University, Ganzhou 341000, P.R. China
| | - Xiao-Lin Fan
- Key Laboratory of Organo-pharmaceutical Chemistry, Gannan Normal University, Ganzhou 341000, P.R. China
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23
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Wada Y, Murata R, Fujii Y, Asano K, Matsubara S. Enantio- and Diastereoselective Construction of Contiguous Tetrasubstituted Chiral Carbons in Organocatalytic Oxadecalin Synthesis. Org Lett 2020; 22:4710-4715. [DOI: 10.1021/acs.orglett.0c01501] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Affiliation(s)
- Yuuki Wada
- Department of Material Chemistry, Graduate School of Engineering, Kyoto University, Kyotodaigaku-Katsura, Nishikyo, Kyoto 615-8510, Japan
| | - Ryuichi Murata
- Department of Material Chemistry, Graduate School of Engineering, Kyoto University, Kyotodaigaku-Katsura, Nishikyo, Kyoto 615-8510, Japan
| | - Yuki Fujii
- Department of Material Chemistry, Graduate School of Engineering, Kyoto University, Kyotodaigaku-Katsura, Nishikyo, Kyoto 615-8510, Japan
| | - Keisuke Asano
- Department of Material Chemistry, Graduate School of Engineering, Kyoto University, Kyotodaigaku-Katsura, Nishikyo, Kyoto 615-8510, Japan
| | - Seijiro Matsubara
- Department of Material Chemistry, Graduate School of Engineering, Kyoto University, Kyotodaigaku-Katsura, Nishikyo, Kyoto 615-8510, Japan
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24
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Wititsuwannakul T, Mukherjee T, Hall MB, Gladysz JA. Computational Investigations of Enantioselection in Carbon–Carbon Bond Forming Reactions of Ruthenium Guanidinobenzimidazole Second Coordination Sphere Hydrogen Bond Donor Catalysts. Organometallics 2020. [DOI: 10.1021/acs.organomet.0c00072] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Affiliation(s)
- Taveechai Wititsuwannakul
- Department of Chemistry, Texas A&M University, P.O. Box 30012, College Station, Texas 77843-3012, United States
| | - Tathagata Mukherjee
- Department of Chemistry, Texas A&M University, P.O. Box 30012, College Station, Texas 77843-3012, United States
| | - Michael B. Hall
- Department of Chemistry, Texas A&M University, P.O. Box 30012, College Station, Texas 77843-3012, United States
| | - John A. Gladysz
- Department of Chemistry, Texas A&M University, P.O. Box 30012, College Station, Texas 77843-3012, United States
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25
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Ding PG, Zhou F, Wang X, Zhao QH, Yu JS, Zhou J. H-bond donor-directed switching of diastereoselectivity in the Michael addition of α-azido ketones to nitroolefins. Chem Sci 2020; 11:3852-3861. [PMID: 34122853 PMCID: PMC8152593 DOI: 10.1039/d0sc00475h] [Citation(s) in RCA: 21] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022] Open
Abstract
The development of catalyst-controlled stereodivergent asymmetric catalysis is important for providing facile access to all stereoisomers of chiral products with multiple stereocenters from the same starting materials. Despite progress, new design strategies for diastereodivergent asymmetric catalysis are still highly desirable. Here we report the potency of H-bond donors as the governing factor to tune diastereoselectivity in a highly diastereoselective switchable enantioselective Michael addition of α-azido ketones to nitroolefins. While a newly developed bifunctional tertiary amine, phosphoramide, preferentially afforded syn-adducts, an analogous squaramide catalyst selectively gave anti-adducts. The resulting multifunctional tertiary azides can be converted to spiro-pyrrolidines with four continuous stereocenters in a one-pot operation. Mechanistic studies cast light on the control of diastereoselectivity by H-bond donors. While the squaramide-catalyzed reaction proceeded with a transition state with both squaramide N–H bonds binding to an enolate intermediate, an unprecedented model was proposed for the phosphoramide-mediated reaction wherein an amide N–H bond and an alkylammonium ion formed in situ interact with nitroolefins, with the enolate stabilized by nonclassical C–H⋯O hydrogen-bonding interactions. We report the successful reversal of the diastereoselectivity in an unprecedented Michael addition of α-azido ketones to nitroolefins catalyzed by bifunctional tertiary amines, simply by varying the H-bond donor from phosphoramide to squaramide.![]()
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Affiliation(s)
- Pei-Gang Ding
- Shanghai Engineering Research Center of Molecular Therapeutics and New Drug Development, Shanghai Key Laboratory of Green Chemistry and Chemical Processes, School of Chemistry and Molecular Engineering, East China Normal University 3663N Zhongshan Road Shanghai 200062 China
| | - Feng Zhou
- Shanghai Engineering Research Center of Molecular Therapeutics and New Drug Development, Shanghai Key Laboratory of Green Chemistry and Chemical Processes, School of Chemistry and Molecular Engineering, East China Normal University 3663N Zhongshan Road Shanghai 200062 China
| | - Xin Wang
- College of Chemistry, Sichuan University Chengdu Sichuan 610064 China
| | - Qiu-Hua Zhao
- Shanghai Engineering Research Center of Molecular Therapeutics and New Drug Development, Shanghai Key Laboratory of Green Chemistry and Chemical Processes, School of Chemistry and Molecular Engineering, East China Normal University 3663N Zhongshan Road Shanghai 200062 China
| | - Jin-Sheng Yu
- Shanghai Engineering Research Center of Molecular Therapeutics and New Drug Development, Shanghai Key Laboratory of Green Chemistry and Chemical Processes, School of Chemistry and Molecular Engineering, East China Normal University 3663N Zhongshan Road Shanghai 200062 China.,Key Laboratory of Tropical Medicinal Resource Chemistry of Ministry of Education, Hainan Normal University Haikou 571158 China
| | - Jian Zhou
- Shanghai Engineering Research Center of Molecular Therapeutics and New Drug Development, Shanghai Key Laboratory of Green Chemistry and Chemical Processes, School of Chemistry and Molecular Engineering, East China Normal University 3663N Zhongshan Road Shanghai 200062 China.,State Key Laboratory of Organometallic Chemistry, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences Shanghai 200032 China
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26
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Curti C, Battistini L, Sartori A, Zanardi F. New Developments of the Principle of Vinylogy as Applied to π-Extended Enolate-Type Donor Systems. Chem Rev 2020; 120:2448-2612. [PMID: 32040305 PMCID: PMC7993750 DOI: 10.1021/acs.chemrev.9b00481] [Citation(s) in RCA: 99] [Impact Index Per Article: 24.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/31/2019] [Indexed: 12/19/2022]
Abstract
The principle of vinylogy states that the electronic effects of a functional group in a molecule are possibly transmitted to a distal position through interposed conjugated multiple bonds. As an emblematic case, the nucleophilic character of a π-extended enolate-type chain system may be relayed from the legitimate α-site to the vinylogous γ, ε, ..., ω remote carbon sites along the chain, provided that suitable HOMO-raising strategies are adopted to transform the unsaturated pronucleophilic precursors into the reactive polyenolate species. On the other hand, when "unnatural" carbonyl ipso-sites are activated as nucleophiles (umpolung), vinylogation extends the nucleophilic character to "unnatural" β, δ, ... remote sites. Merging the principle of vinylogy with activation modalities and concepts such as iminium ion/enamine organocatalysis, NHC-organocatalysis, cooperative organo/metal catalysis, bifunctional organocatalysis, dicyanoalkylidene activation, and organocascade reactions represents an impressive step forward for all vinylogous transformations. This review article celebrates this evolutionary progress, by collecting, comparing, and critically describing the achievements made over the nine year period 2010-2018, in the generation of vinylogous enolate-type donor substrates and their use in chemical synthesis.
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Affiliation(s)
| | | | | | - Franca Zanardi
- Dipartimento di Scienze degli
Alimenti e del Farmaco, Università
di Parma, Parco Area delle Scienze 27A, 43124 Parma, Italy
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27
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Bai Z, Zhang C, Chen Y, Liu A, Wang X, Yan C, Liu X, Zhang X, Li Y, Yuan Y, Ge Z, Pang J, Chai Y, Wang X, Li R. A vinylogous Michael reaction of 2-furanone dimers with α,β-unsaturated nitroolefins for constructing chiral γ,γ-disubstituted butenolides. Org Chem Front 2020. [DOI: 10.1039/d0qo00376j] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
An asymmetric vinylogous Michael reaction of 2-furanone dimers with α,β-unsaturated nitroolefins utilizing bifunctional thiourea as a catalyst has been developed, which provides an easy access to a wide range of chiral γ,γ-disubstituted butenolides.
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28
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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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29
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Wu Y, Jhong Y, Lin H, Swain SP, Tsai HG, Hou D. Organocatalyzed Enantioselective Michael Addition of 2‐Hydroxypyridines and α,β‐Unsaturated 1,4‐Dicarbonyl Compounds. Adv Synth Catal 2019. [DOI: 10.1002/adsc.201900997] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Affiliation(s)
- Yu‐Chun Wu
- Department of ChemistryNational Central University 300 Jhong-Da Rd., Jhong-Li Taoyuan Taiwan 32001
| | - Yi Jhong
- Department of ChemistryNational Central University 300 Jhong-Da Rd., Jhong-Li Taoyuan Taiwan 32001
| | - Hui‐Jie Lin
- Department of ChemistryNational Central University 300 Jhong-Da Rd., Jhong-Li Taoyuan Taiwan 32001
| | - Sharada Prasanna Swain
- Department of ChemistryNational Central University 300 Jhong-Da Rd., Jhong-Li Taoyuan Taiwan 32001
- Assistant Professor-Selection Grade, School of Health SciencesUniversity of Petroleum and Energy Studies Bidholi, Dehradun- 248007 India
| | - Hui‐Hsu Gavin Tsai
- Department of ChemistryNational Central University 300 Jhong-Da Rd., Jhong-Li Taoyuan Taiwan 32001
- Research Center of New Generation Light Driven Photovoltaic Module InstitutionNational Central University 300 Jhong-Da Rd., Jhong-Li Taoyuan Taiwan 32001
| | - Duen‐Ren Hou
- Department of ChemistryNational Central University 300 Jhong-Da Rd., Jhong-Li Taoyuan Taiwan 32001
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30
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Shan C, Zhang T, Xiong Q, Yan H, Bai R, Lan Y. Hydrogen‐Bond‐Induced Chiral Axis Construction: Theoretical Study of Cinchonine–Thiourea‐Catalyzed Enantioselective Intramolecular Cycloaddition. Chem Asian J 2019; 14:2731-2736. [DOI: 10.1002/asia.201900624] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/10/2019] [Revised: 06/10/2019] [Indexed: 12/23/2022]
Affiliation(s)
- Chunhui Shan
- Postdoctoral Station of Biomedical EngineeringChongqing University Chongqing 400030 P.R. China
| | - Tao Zhang
- School of Chemistry and Chemical EngineeringChongqing Key Laboratory of Theoretical and Computational ChemistryChongqing University Chongqing 400030 P.R. China
| | - Qin Xiong
- School of Chemistry and Chemical EngineeringChongqing Key Laboratory of Theoretical and Computational ChemistryChongqing University Chongqing 400030 P.R. China
| | - Hailong Yan
- Chongqing Key Laboratory of Natural Product Synthesis and Drug, ResearchSchool of Pharmaceutical SciencesChongqing University Chongqing 400030 P.R. China
| | - Ruopeng Bai
- School of Chemistry and Chemical EngineeringChongqing Key Laboratory of Theoretical and Computational ChemistryChongqing University Chongqing 400030 P.R. China
| | - Yu Lan
- School of Chemistry and Chemical EngineeringChongqing Key Laboratory of Theoretical and Computational ChemistryChongqing University Chongqing 400030 P.R. China
- College of Chemistry and Molecular EngineeringZhengzhou University Zhengzhou 450001 P.R. China
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31
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Kurimoto Y, Nasu T, Fujii Y, Asano K, Matsubara S. Asymmetric Cycloetherification of in Situ Generated Cyanohydrins through the Concomitant Construction of Three Chiral Carbon Centers. Org Lett 2019; 21:2156-2160. [PMID: 30869909 DOI: 10.1021/acs.orglett.9b00462] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Abstract
The organocatalytic enantio- and diastereoselective cycloetherification of in situ generated cyanohydrins through the concomitant construction of three chiral carbon centers is reported. This protocol facilitates the concise synthesis of optically active tetrahydropyran derivatives, which are ubiquitous scaffolds found in various bioactive compounds, through the simultaneous construction of multiple bonds and stereogenic centers, including tetrasubstituted chiral carbons. The resulting products also contain multiple synthetically important functional groups, which expand their possible usefulness as chiral building blocks.
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Affiliation(s)
- Yosuke Kurimoto
- Department of Material Chemistry, Graduate School of Engineering , Kyoto University , Kyotodaigaku-Katsura, Nishikyo , Kyoto 615-8510 , Japan
| | - Teruhisa Nasu
- Department of Material Chemistry, Graduate School of Engineering , Kyoto University , Kyotodaigaku-Katsura, Nishikyo , Kyoto 615-8510 , Japan
| | - Yuki Fujii
- Department of Material Chemistry, Graduate School of Engineering , Kyoto University , Kyotodaigaku-Katsura, Nishikyo , Kyoto 615-8510 , Japan
| | - Keisuke Asano
- Department of Material Chemistry, Graduate School of Engineering , Kyoto University , Kyotodaigaku-Katsura, Nishikyo , Kyoto 615-8510 , Japan
| | - Seijiro Matsubara
- Department of Material Chemistry, Graduate School of Engineering , Kyoto University , Kyotodaigaku-Katsura, Nishikyo , Kyoto 615-8510 , Japan
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32
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Matsumoto A, Asano K, Matsubara S. Kinetic Resolution of Acylsilane Cyanohydrins via Organocatalytic Cycloetherification. Chem Asian J 2019; 14:116-120. [PMID: 30408346 DOI: 10.1002/asia.201801600] [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: 10/30/2018] [Revised: 11/07/2018] [Indexed: 12/15/2022]
Abstract
An asymmetric cyanation of acylsilanes involving the in-situ formation of chiral acylsilane cyanohydrins followed by their kinetic resolution via organocatalytic cycloetherification is described. The highly enantio- and diastereoselective cycloetherification was crucial for achieving a high efficiency in the kinetic resolution. Consequently, acylsilane cyanohydrins containing a tetrasubstituted chiral carbon atom bearing silyl, cyano, and hydroxy groups were obtained in an enantioenriched form. This protocol therefore offers an efficient catalytic approach to optically active acylsilane cyanohydrins, which exhibit potential as chiral building blocks for the synthesis of pharmaceutically relevant chiral organosilanes.
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Affiliation(s)
- Akira Matsumoto
- Department of Material Chemistry, Graduate School of Engineering, Kyoto University, Kyotodaigaku-katsura, Nishikyo, Kyoto, 615-8510, Japan
| | - Keisuke Asano
- Department of Material Chemistry, Graduate School of Engineering, Kyoto University, Kyotodaigaku-katsura, Nishikyo, Kyoto, 615-8510, Japan
| | - Seijiro Matsubara
- Department of Material Chemistry, Graduate School of Engineering, Kyoto University, Kyotodaigaku-katsura, Nishikyo, Kyoto, 615-8510, Japan
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33
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Zheng D, Raeisolsadati Oskouei M, Sanders HJ, Qian J, Williams RM, Brouwer AM. Photophysics of perylene monoimide-labelled organocatalysts. Photochem Photobiol Sci 2019; 18:524-533. [DOI: 10.1039/c8pp00462e] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
A fluorophore-tagged organocatalyst undergoes electron transfer in polar solvents allowing to sense the presence of its free quinuclidine catalytic site.
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Affiliation(s)
- Dongdong Zheng
- van ‘t Hoff Institute for Molecular Sciences
- University of Amsterdam
- 1090 GD Amsterdam
- The Netherlands
| | | | - Hans J. Sanders
- van ‘t Hoff Institute for Molecular Sciences
- University of Amsterdam
- 1090 GD Amsterdam
- The Netherlands
| | - Junhong Qian
- van ‘t Hoff Institute for Molecular Sciences
- University of Amsterdam
- 1090 GD Amsterdam
- The Netherlands
| | - René M. Williams
- van ‘t Hoff Institute for Molecular Sciences
- University of Amsterdam
- 1090 GD Amsterdam
- The Netherlands
| | - Albert M. Brouwer
- van ‘t Hoff Institute for Molecular Sciences
- University of Amsterdam
- 1090 GD Amsterdam
- The Netherlands
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34
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Bhaskararao B, Sunoj RB. Two chiral catalysts in action: insights into cooperativity and stereoselectivity in proline and cinchona-thiourea dual organocatalysis. Chem Sci 2018; 9:8738-8747. [PMID: 30627394 PMCID: PMC6289169 DOI: 10.1039/c8sc03078b] [Citation(s) in RCA: 25] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/11/2018] [Accepted: 09/17/2018] [Indexed: 12/13/2022] Open
Abstract
Increasing use of two chiral catalysts in cooperative asymmetric catalysis in recent years raises some fundamental questions on chiral compatibility between the catalysts, modes of activation, and relative disposition of substrates within the chiral environment of the catalysts for effective asymmetric induction. We present molecular insights into a one-pot catalytic Michael reaction cascade between a dicarbonyl compound (7-oxo-7-phenylhept-5-enal) and nitrostyrene, catalyzed by two chiral organocatalysts (proline and cinchona-thiourea), leading to a densely functionalized tetra-substituted cyclohexane product. The density functional theory (SMD(toluene)/M06-2X/6-31G**) computations helped us identify the role of the organocatalytic catalytic dyad in providing a lower energy pathway. The covalent activation of the aldehydic end by (S)-proline results in an enamine, which then adds to the noncovalently activated nitrostyrene in the first Michael addition to give a nitronate anion. The configuration at two of the four chiral centers of the product gets fixed in this step whereas that of the remaining two is determined by intramolecular cyclization between the nitronate and the enone. Important mechanistic features such as (a) a lower energy pathway as compared to a proline-only route for the formation of the syn-enamine and its participation in the first Michael addition and (b) the origin of the preferred prochiral faces in the C-C bond formation are traced to the active involvement of the cinchona-thiourea catalyst in conjunction with proline in each step of the reaction. The true cooperative action by both the catalysts is identified as enabled by a network of hydrogen bonding, and π···π stacking between the aryl ring of the cinchona-thiourea catalyst as well as other noncovalent interactions between the catalysts themselves, and that between the catalysts and substrate.
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Affiliation(s)
- Bangaru Bhaskararao
- Department of Chemistry , Indian Institute of Technology Bombay , Powai , Mumbai 400076 , India .
| | - Raghavan B Sunoj
- Department of Chemistry , Indian Institute of Technology Bombay , Powai , Mumbai 400076 , India .
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35
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Franconetti A, de Gonzalo G. Recent Developments on Supported Hydrogen-bond Organocatalysts. ChemCatChem 2018. [DOI: 10.1002/cctc.201801459] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Affiliation(s)
- Antonio Franconetti
- Departamento de Química; Universitat Autonoma de Barcelona; Cerdanyola del Vallés 01893 Spain
| | - Gonzalo de Gonzalo
- Departamento de Química Orgánica; Universidad de Sevilla; c/ Profesor García González 2 41012 Sevilla Spain
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36
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Li H, Hong X. Computational studies of cinchona alkaloid-catalyzed asymmetric Michael additions. CHINESE CHEM LETT 2018. [DOI: 10.1016/j.cclet.2018.01.030] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
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37
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Jiang X, Wang H, He H, Wang W, Wang Y, Ke Z, Yeung YY. Enantioseletive Fluorination of 3-Functionalized Oxindoles Using Electron-rich Amino Urea Catalyst. Adv Synth Catal 2018. [DOI: 10.1002/adsc.201801133] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Affiliation(s)
- Xiaojian Jiang
- Jinan University College of Pharmacy; Institute of New Drug Research and Guangzhou Key Laboratory of Innovative Chemical Drug Research in Cardiocerebrovascular Diseases; Guangzhou 510632 People's Republic of China
| | - Haitao Wang
- Jinan University College of Pharmacy; Institute of New Drug Research and Guangzhou Key Laboratory of Innovative Chemical Drug Research in Cardiocerebrovascular Diseases; Guangzhou 510632 People's Republic of China
| | - Haoquan He
- Jinan University College of Pharmacy; Institute of New Drug Research and Guangzhou Key Laboratory of Innovative Chemical Drug Research in Cardiocerebrovascular Diseases; Guangzhou 510632 People's Republic of China
| | - Wei Wang
- Jinan University College of Pharmacy; Institute of New Drug Research and Guangzhou Key Laboratory of Innovative Chemical Drug Research in Cardiocerebrovascular Diseases; Guangzhou 510632 People's Republic of China
| | - Yuqiang Wang
- Jinan University College of Pharmacy; Institute of New Drug Research and Guangzhou Key Laboratory of Innovative Chemical Drug Research in Cardiocerebrovascular Diseases; Guangzhou 510632 People's Republic of China
| | - Zhihai Ke
- Department of Chemistry; The Chinese University of Hong Kong, Shatin, NT; Hong Kong People's Republic of China
| | - Ying-Yeung Yeung
- Department of Chemistry; The Chinese University of Hong Kong, Shatin, NT; Hong Kong People's Republic of China
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38
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Babu KN, Roy A, Singh M, Bisai A. Thiourea-Catalyzed Enantioselective Malonate Addition onto 3-Sulfonyl-3'-indolyl-2-oxindoles: Formal Total Syntheses of (-)-Chimonanthine, (-)-Folicanthine, and (+)-Calycanthine. Org Lett 2018; 20:6327-6331. [PMID: 30299963 DOI: 10.1021/acs.orglett.8b02327] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
A general approach to bispyrroloindolines via a key thiourea-catalyzed addition of malonates to 3-sulfonyl-3'-indolyl-2-oxindoles is reported. The enantioselelective process is found to be highly effective (up to 94% ee), where a C-C bond formation leads to the synthesis of a number of 2-oxindoles with an all-carbon quaternary stereocenter.
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Affiliation(s)
- K Naresh Babu
- Department of Chemistry , IISER Bhopal , Bhopal Bypass Road , Bhauri, Bhopal 462 066 , Madhya Pradesh , India
| | - Avishek Roy
- Department of Chemistry , IISER Bhopal , Bhopal Bypass Road , Bhauri, Bhopal 462 066 , Madhya Pradesh , India
| | - Manvendra Singh
- Department of Chemistry , IISER Bhopal , Bhopal Bypass Road , Bhauri, Bhopal 462 066 , Madhya Pradesh , India
| | - Alakesh Bisai
- Department of Chemistry , IISER Bhopal , Bhopal Bypass Road , Bhauri, Bhopal 462 066 , Madhya Pradesh , India
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39
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Wang Y, Lin JB, Xie JK, Lu H, Hu XQ, Xu PF. Dearomative Dienolate-Mediated Catalysis: A Remote Activation Strategy for Asymmetric Functionalization of Benzylic C–H Bonds of Heteroaryl Aldehydes. Org Lett 2018; 20:5835-5839. [DOI: 10.1021/acs.orglett.8b02523] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Affiliation(s)
- Yang Wang
- State Key Laboratory of Applied Organic Chemistry, College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou 730000, P. R. China
| | - Jun-Bing Lin
- State Key Laboratory of Applied Organic Chemistry, College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou 730000, P. R. China
| | - Ji-Kang Xie
- State Key Laboratory of Applied Organic Chemistry, College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou 730000, P. R. China
| | - Hong Lu
- State Key Laboratory of Applied Organic Chemistry, College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou 730000, P. R. China
| | - Xiu-Qin Hu
- State Key Laboratory of Applied Organic Chemistry, College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou 730000, P. R. China
| | - Peng-Fei Xu
- State Key Laboratory of Applied Organic Chemistry, College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou 730000, P. R. China
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40
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Jiang X, Liu S, Yang S, Jing M, Xu L, Yu P, Wang Y, Yeung YY. Enantioselective Bromolactonization of Deactivated Olefinic Acids. Org Lett 2018; 20:3259-3262. [DOI: 10.1021/acs.orglett.8b01125] [Citation(s) in RCA: 26] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Affiliation(s)
- Xiaojian Jiang
- Institute of New Drug Research and Guangzhou Key Laboratory of Innovative Chemical Drug Research in Cardiocerebrovascular Diseases, Jinan University College of Pharmacy, Guangzhou 510632, People’s Republic of China
| | - Shenghui Liu
- Institute of New Drug Research and Guangzhou Key Laboratory of Innovative Chemical Drug Research in Cardiocerebrovascular Diseases, Jinan University College of Pharmacy, Guangzhou 510632, People’s Republic of China
| | - Si Yang
- Institute of New Drug Research and Guangzhou Key Laboratory of Innovative Chemical Drug Research in Cardiocerebrovascular Diseases, Jinan University College of Pharmacy, Guangzhou 510632, People’s Republic of China
| | - Mei Jing
- Institute of New Drug Research and Guangzhou Key Laboratory of Innovative Chemical Drug Research in Cardiocerebrovascular Diseases, Jinan University College of Pharmacy, Guangzhou 510632, People’s Republic of China
| | - Lipeng Xu
- Institute of New Drug Research and Guangzhou Key Laboratory of Innovative Chemical Drug Research in Cardiocerebrovascular Diseases, Jinan University College of Pharmacy, Guangzhou 510632, People’s Republic of China
| | - Pei Yu
- Institute of New Drug Research and Guangzhou Key Laboratory of Innovative Chemical Drug Research in Cardiocerebrovascular Diseases, Jinan University College of Pharmacy, Guangzhou 510632, People’s Republic of China
| | - Yuqiang Wang
- Institute of New Drug Research and Guangzhou Key Laboratory of Innovative Chemical Drug Research in Cardiocerebrovascular Diseases, Jinan University College of Pharmacy, Guangzhou 510632, People’s Republic of China
| | - Ying-Yeung Yeung
- Department of Chemistry, The Chinese University of Hong Kong, Shatin, NT, Hong Kong, China
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41
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Kumpulainen T, Qian J, Brouwer AM. Spectroscopic Study of a Cinchona Alkaloid-Catalyzed Henry Reaction. ACS OMEGA 2018; 3:1871-1880. [PMID: 29503974 PMCID: PMC5830691 DOI: 10.1021/acsomega.7b01713] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 11/02/2017] [Accepted: 01/05/2018] [Indexed: 06/08/2023]
Abstract
A spectroscopic study of an organocatalytic Henry reaction between nitroalkanes and aldehydes catalyzed by a quinidine-derived Cinchona alkaloid is described. The binding modes of the reaction substrates are investigated using electronic absorption and fluorescence spectroscopy and further corroborated by nuclear magnetic resonance measurements. Aldehydes are shown to associate with both the 6'-OH group and the basic quinuclidine nitrogen of the catalyst, whereas nitroalkanes do not exhibit a clear binding mode. Reaction progress kinetic analysis reveals that the reaction is first-order in both of the substrates and the catalyst. Second, the reaction proceeds approximately five times faster in the excess of the nitroalkanes than in the excess of the aldehydes, suggesting that binding of the aldehydes results in the inhibition of the catalyst. Aldehydes deactivate the basic quinuclidine site, thus suppressing the deprotonation of the nitroalkanes which is the proposed initial step in the reaction cycle.
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42
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Qiu L, Tian K, Wen Z, Deng Y, Kang D, Liang H, Zhu X, Shen B, Duan Y, Huang Y. Biomimetic Stereoselective Sulfa-Michael Addition Leads to Platensimycin and Platencin Sulfur Analogues against Methicillin-Resistant Staphylococcus aureus. JOURNAL OF NATURAL PRODUCTS 2018; 81:316-322. [PMID: 29389125 PMCID: PMC6245554 DOI: 10.1021/acs.jnatprod.7b00745] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
Several sulfur-containing platensimycin (PTM) and platencin (PTN) analogues, with activities comparable to the parent natural products, have recently been discovered from microorganisms, implying a biomimetic route to diversify the PTM and PTN scaffolds for structure-activity relationship study. We present here a substrate-directed and scaleable semisynthetic strategy to make PTM and PTN sulfur analogues with excellent diasteroselectivity, without using any chiral catalysts. Most of the sulfur analogues showed strong activities against clinical Staphylococcus aureus isolates, with minimum inhibitory concentrations of 0.5-2 μg mL-1. Density functional theory calculations were in agreement with the observed selectivity for these analogues and suggest that the conformation restraints of the terpene cages of PTM and PTN on the transition states determine the si-face attack selectivity.
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Affiliation(s)
- Lin Qiu
- Xiangya International Academy of Translational Medicine, Changsha, Hunan 410013, People’s Republic of China
- Xiangya Hospital, Central South University, Changsha, Hunan 410013, People’s Republic of China
| | - Kai Tian
- Xiangya International Academy of Translational Medicine, Changsha, Hunan 410013, People’s Republic of China
| | - Zhongqing Wen
- Xiangya International Academy of Translational Medicine, Changsha, Hunan 410013, People’s Republic of China
| | - Youchao Deng
- Xiangya International Academy of Translational Medicine, Changsha, Hunan 410013, People’s Republic of China
| | - Dingding Kang
- Xiangya International Academy of Translational Medicine, Changsha, Hunan 410013, People’s Republic of China
| | - Haoyu Liang
- Xiangya International Academy of Translational Medicine, Changsha, Hunan 410013, People’s Republic of China
| | - Xiangcheng Zhu
- Xiangya International Academy of Translational Medicine, Changsha, Hunan 410013, People’s Republic of China
- Xiangya Hospital, Central South University, Changsha, Hunan 410013, People’s Republic of China
- Hunan Engineering Research Center of Combinatorial Biosynthesis and Natural Product Drug Discovery, Changsha, Hunan 410011, People’s Republic of China
| | - Ben Shen
- Departments of Chemistry, Jupiter, Florida 33458, United States
- Molecular Medicine, Jupiter, Florida 33458, United States
- Natural Products Library Initiative, Jupiter, Florida 33458, United States
| | - Yanwen Duan
- Xiangya International Academy of Translational Medicine, Changsha, Hunan 410013, People’s Republic of China
- Xiangya Hospital, Central South University, Changsha, Hunan 410013, People’s Republic of China
- Hunan Engineering Research Center of Combinatorial Biosynthesis and Natural Product Drug Discovery, Changsha, Hunan 410011, People’s Republic of China
- National Engineering Research Center of Combinatorial Biosynthesis for Drug Discovery, Changsha, Hunan 410011, People’s Republic of China
| | - Yong Huang
- Xiangya International Academy of Translational Medicine, Changsha, Hunan 410013, People’s Republic of China
- Xiangya Hospital, Central South University, Changsha, Hunan 410013, People’s Republic of China
- National Engineering Research Center of Combinatorial Biosynthesis for Drug Discovery, Changsha, Hunan 410011, People’s Republic of China
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43
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Mondal B, Mondal K, Satpati P, Pan SC. Organocatalytic Asymmetric Dimerization of γ-Hydroxyenones to Acetals and Theoretical Investigations into the Diastereoselection. European J Org Chem 2017. [DOI: 10.1002/ejoc.201701439] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Buddahdeb Mondal
- Department of Chemistry; Indian Institute of Technology Guwahati; 781039 Guwahati Assam India
| | - Keshab Mondal
- Department of Chemistry; Indian Institute of Technology Guwahati; 781039 Guwahati Assam India
| | - Priyadarshi Satpati
- Department of Biosciences and Bioengineering; Indian Institute of Technology Guwahati; 781039 Guwahati Assam India
| | - Subhas Chandra Pan
- Department of Chemistry; Indian Institute of Technology Guwahati; 781039 Guwahati Assam India
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44
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Chaudhuri S, Bhunia S, Roy A, Das MK, Bisai A. Biomimetic Total Syntheses of Clavine Alkaloids. Org Lett 2017; 20:288-291. [DOI: 10.1021/acs.orglett.7b03683] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Saikat Chaudhuri
- Department of Chemistry, Indian Institute of Science Education and Research Bhopal, Bhopal Bypass
Road, Bhauri, Bhopal 462
066, Madhya Pradesh, India
| | - Subhajit Bhunia
- Department of Chemistry, Indian Institute of Science Education and Research Bhopal, Bhopal Bypass
Road, Bhauri, Bhopal 462
066, Madhya Pradesh, India
| | - Avishek Roy
- Department of Chemistry, Indian Institute of Science Education and Research Bhopal, Bhopal Bypass
Road, Bhauri, Bhopal 462
066, Madhya Pradesh, India
| | - Mrinal K. Das
- Department of Chemistry, Indian Institute of Science Education and Research Bhopal, Bhopal Bypass
Road, Bhauri, Bhopal 462
066, Madhya Pradesh, India
| | - Alakesh Bisai
- Department of Chemistry, Indian Institute of Science Education and Research Bhopal, Bhopal Bypass
Road, Bhauri, Bhopal 462
066, Madhya Pradesh, India
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45
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Curti C, Battistini L, Sartori A, Rassu G, Pelosi G, Lombardo M, Zanardi F. (E
)-3-(Alkoxycarbonyl-2-Alkyliden)-2-Oxindoles: Multidentate Pronucleophiles for the Organocatalytic, Vinylogous Michael Addition to Nitroolefins. Adv Synth Catal 2017. [DOI: 10.1002/adsc.201701164] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Claudio Curti
- Dipartimento di Scienze degli Alimenti e del Farmaco; Università di Parma; Parco Area delle Scienze 27 A 43124 Parma Italy
| | - Lucia Battistini
- Dipartimento di Scienze degli Alimenti e del Farmaco; Università di Parma; Parco Area delle Scienze 27 A 43124 Parma Italy
| | - Andrea Sartori
- Dipartimento di Scienze degli Alimenti e del Farmaco; Università di Parma; Parco Area delle Scienze 27 A 43124 Parma Italy
| | - Gloria Rassu
- Istituto di Chimica Biomolecolare del CNR; Traversa La Crucca 3 07100 Li Punti, Sassari Italy
| | - Giorgio Pelosi
- Dipartimento di Scienze Chimiche, della Vita e della Sostenibilità Ambientale; Parco Area delle Scienze 17 A 43124 Parma Italy
| | - Marco Lombardo
- Dipartimento di Chimica “G. Ciamician”; Università degli Studi di Bologna; Via Selmi 2 40126 Bologna Italy
| | - Franca Zanardi
- Dipartimento di Scienze degli Alimenti e del Farmaco; Università di Parma; Parco Area delle Scienze 27 A 43124 Parma Italy
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46
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Wang P, Gao Y, Zhao Y, Liu W, Wang Y. Unveiling Mechanism of a Quinine-Squaramide Catalyzed Enantioselective Aza-Friedel–Crafts Reaction between Cyclic Trifluoromethyl Ketimine and Naphthol: A DFT Study. J Org Chem 2017; 82:13109-13114. [DOI: 10.1021/acs.joc.7b02168] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Affiliation(s)
- Ping Wang
- College of Chemistry, Chemical Engineering
and Materials Science, Soochow University, Suzhou 215123, PR China
| | - Yun Gao
- College of Chemistry, Chemical Engineering
and Materials Science, Soochow University, Suzhou 215123, PR China
| | - Yang Zhao
- College of Chemistry, Chemical Engineering
and Materials Science, Soochow University, Suzhou 215123, PR China
| | - Wei Liu
- College of Chemistry, Chemical Engineering
and Materials Science, Soochow University, Suzhou 215123, PR China
| | - Yong Wang
- College of Chemistry, Chemical Engineering
and Materials Science, Soochow University, Suzhou 215123, PR China
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47
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Organocatalytic enantio- and diastereoselective cycloetherification via dynamic kinetic resolution of chiral cyanohydrins. Nat Commun 2017; 8:1397. [PMID: 29123080 PMCID: PMC5680189 DOI: 10.1038/s41467-017-01099-x] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/13/2016] [Accepted: 08/15/2017] [Indexed: 12/04/2022] Open
Abstract
Enantioselective approaches to synthesize six-membered oxacycles with multiple stereogenic centres are in high demand to enable the discovery of new therapeutic agents. Here we present a concise organocatalytic cycloetherification for the highly enantio- and diastereoselective synthesis of tetrahydropyrans involving simultaneous construction of two chiral centres, one of which is fully substituted. This method involves dynamic kinetic resolution of reversibly generated chiral cyanohydrins. A chiral bifunctional organocatalyst selectively recognizes a specific chair-like conformation of the intermediate, in which the small steric effect of the linear cyano group as well as its anomeric effect play important roles in controlling stereoselectivity. The products offer additional utility as synthetic intermediates because the cyano group can be further transformed into a variety of important functional groups. This strategy provides a platform to design efficient approaches to obtain a wide range of optically active tetrahydropyrans, which are otherwise synthetically challenging materials. Enantioselective synthesis of six-membered oxacycles with multiple stereogenic centres is essential for the discovery of new therapeutic agents. Here the authors show organocatalytic cycloetherification for the highly enantio- and diastereoselective synthesis of tetrahydropyrans.
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48
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Li M, Xue XS, Cheng JP. Mechanism and Origins of Stereoinduction in Natural Cinchona Alkaloid Catalyzed Asymmetric Electrophilic Trifluoromethylthiolation of β-Keto Esters with N-Trifluoromethylthiophthalimide as Electrophilic SCF3 Source. ACS Catal 2017. [DOI: 10.1021/acscatal.7b03007] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Affiliation(s)
- Man Li
- State
Key Laboratory of Elemento-Organic Chemistry, College of Chemistry,
Collaborative Innovation Center of Chemical Science and Engineering, Nankai University, Tianjin 300071, People’s Republic of China
| | - Xiao-Song Xue
- State
Key Laboratory of Elemento-Organic Chemistry, College of Chemistry,
Collaborative Innovation Center of Chemical Science and Engineering, Nankai University, Tianjin 300071, People’s Republic of China
| | - Jin-Pei Cheng
- State
Key Laboratory of Elemento-Organic Chemistry, College of Chemistry,
Collaborative Innovation Center of Chemical Science and Engineering, Nankai University, Tianjin 300071, People’s Republic of China
- Center
of Basic Molecular Science, Department of Chemistry, Tsinghua University, Beijing 100084, People’s Republic of China
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49
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Suga H, Hashimoto Y, Toda Y, Fukushima K, Esaki H, Kikuchi A. Amine-Urea-Mediated Asymmetric Cycloadditions between Nitrile Oxides and o
-Hydroxystyrenes by Dual Activation. Angew Chem Int Ed Engl 2017; 56:11936-11939. [DOI: 10.1002/anie.201705662] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/03/2017] [Revised: 07/12/2017] [Indexed: 12/12/2022]
Affiliation(s)
- Hiroyuki Suga
- Department of Chemistry and Material Engineering; Faculty of Engineering; Shinshu University; Wakasato Nagano 380-8553 Japan
| | - Yohei Hashimoto
- Department of Chemistry and Material Engineering; Faculty of Engineering; Shinshu University; Wakasato Nagano 380-8553 Japan
| | - Yasunori Toda
- Department of Chemistry and Material Engineering; Faculty of Engineering; Shinshu University; Wakasato Nagano 380-8553 Japan
| | - Kazuaki Fukushima
- Department of Chemistry; Hyogo College of Medicine; Mukogawa-cho Nishinomiya Hyogo 663-8501 Japan
| | - Hiroyoshi Esaki
- Department of Chemistry; Hyogo College of Medicine; Mukogawa-cho Nishinomiya Hyogo 663-8501 Japan
| | - Ayaka Kikuchi
- Department of Chemistry and Material Engineering; Faculty of Engineering; Shinshu University; Wakasato Nagano 380-8553 Japan
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50
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Suga H, Hashimoto Y, Toda Y, Fukushima K, Esaki H, Kikuchi A. Amine-Urea-Mediated Asymmetric Cycloadditions between Nitrile Oxides and o
-Hydroxystyrenes by Dual Activation. Angew Chem Int Ed Engl 2017. [DOI: 10.1002/ange.201705662] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Affiliation(s)
- Hiroyuki Suga
- Department of Chemistry and Material Engineering; Faculty of Engineering; Shinshu University; Wakasato Nagano 380-8553 Japan
| | - Yohei Hashimoto
- Department of Chemistry and Material Engineering; Faculty of Engineering; Shinshu University; Wakasato Nagano 380-8553 Japan
| | - Yasunori Toda
- Department of Chemistry and Material Engineering; Faculty of Engineering; Shinshu University; Wakasato Nagano 380-8553 Japan
| | - Kazuaki Fukushima
- Department of Chemistry; Hyogo College of Medicine; Mukogawa-cho Nishinomiya Hyogo 663-8501 Japan
| | - Hiroyoshi Esaki
- Department of Chemistry; Hyogo College of Medicine; Mukogawa-cho Nishinomiya Hyogo 663-8501 Japan
| | - Ayaka Kikuchi
- Department of Chemistry and Material Engineering; Faculty of Engineering; Shinshu University; Wakasato Nagano 380-8553 Japan
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