1
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Hu S, Pan Y, Ni D, Deng L. Facile access to bicyclo[2.1.1]hexanes by Lewis acid-catalyzed formal cycloaddition between silyl enol ethers and bicyclo[1.1.0]butanes. Nat Commun 2024; 15:6128. [PMID: 39033172 PMCID: PMC11271461 DOI: 10.1038/s41467-024-50434-6] [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: 04/11/2024] [Accepted: 07/11/2024] [Indexed: 07/23/2024] Open
Abstract
Saturated three-dimensional carbocycles have gained increasing prominence in synthetic and medicinal chemistry. In particular, bicyclo[2.1.1]hexanes (BCHs) have been identified as the molecular replacement for benzenes. Here, we present facile access to a variety of BCHs via a stepwise two-electron formal (3 + 2) cycloaddition between silyl enol ethers and bicyclo[1.1.0]butanes (BCBs) under Lewis acid catalysis. The reaction features wide functional group tolerance for silyl enol ethers, allowing the efficient construction of two vicinal quaternary carbon centers and a silyl-protected tertiary alcohol unit in a streamlined fashion. Interestingly, the reaction with conjugated silyl dienol ethers can provide access to bicyclo[4.1.1]octanes (BCOs) equipped with silyl enol ethers that facilitate further transformation. The utilities of this methodology are demonstrated by the late-stage modification of natural products, transformations of tertiary alcohol units on bicyclo[2.1.1]hexane frameworks, and derivatization of silyl enol ethers on bicyclo[4.1.1]octanes, delivering functionalized bicycles that are traditionally inaccessible.
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Affiliation(s)
- Sai Hu
- Department of Chemistry, Zhejiang University, Hangzhou, China
- Key Laboratory of Precise Synthesis of Functional Molecules of Zhejiang Province, School of Science and Research Center for Industries of the Future, Westlake University, Hangzhou, China
- Institute of Natural Sciences, Westlake Institute for Advanced Study, Hangzhou, China
| | - Yuming Pan
- Key Laboratory of Precise Synthesis of Functional Molecules of Zhejiang Province, School of Science and Research Center for Industries of the Future, Westlake University, Hangzhou, China
- Institute of Natural Sciences, Westlake Institute for Advanced Study, Hangzhou, China
| | - Dongshun Ni
- Key Laboratory of Precise Synthesis of Functional Molecules of Zhejiang Province, School of Science and Research Center for Industries of the Future, Westlake University, Hangzhou, China.
- Institute of Natural Sciences, Westlake Institute for Advanced Study, Hangzhou, China.
| | - Li Deng
- Key Laboratory of Precise Synthesis of Functional Molecules of Zhejiang Province, School of Science and Research Center for Industries of the Future, Westlake University, Hangzhou, China.
- Institute of Natural Sciences, Westlake Institute for Advanced Study, Hangzhou, China.
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2
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Xu MM, Xie PP, He JX, Zhang YZ, Zheng C, Cai Q. Enantioselective Cross-[4 + 2]-Cycloaddition/Decarboxylation of 2-Pyrones by Cooperative Catalysis of the Pd(0)/NHC Complex and Chiral Phosphoric Acid. J Am Chem Soc 2024; 146:6936-6946. [PMID: 38414423 DOI: 10.1021/jacs.3c14409] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/29/2024]
Abstract
Here, we describe a cooperative Pd(0)/chiral phosphoric acid catalytic system that allows us to realize the first chemo-, regio-, and enantioselective sequential cross-[4 + 2]-cycloaddition/decarboxylation reaction between 2-pyrones and unactivated acyclic 1,3-dienes. The key to the success of this transformation is the utilization of an achiral N-heterocyclic carbene (NHC) as the ligand and a newly developed chiral phosphoric acid as the cocatalyst. Experimental investigations and computational studies support the idea that the Pd(0)/NHC complex acts as a π-Lewis base to increase the nucleophilicity of 1,3-dienes via η2 coordination, while the chiral phosphoric acid simultaneously increases the electrophilicity of 2-pyrones by hydrogen bonding. By this synergistic catalysis, the sequential cross-[4 + 2]-cycloaddition and decarboxylation reaction proceeds efficiently, enabling the preparation of a wide range of chiral vinyl-substituted 1,3-cyclohexadienes in good yields and enantioselectivities. The synthetic utility of this reaction is demonstrated by synthetic transformations of the product to various valuable chiral six-membered carbocycles.
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Affiliation(s)
- Meng-Meng Xu
- Department of Chemistry, Research Center for Molecular Recognition and Synthesis, Fudan University, Shanghai 200433, China
| | - Pei-Pei Xie
- State Key Laboratory of Organometallic Chemistry, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, Shanghai 200032, China
| | - Jun-Xiong He
- Department of Chemistry, Research Center for Molecular Recognition and Synthesis, Fudan University, Shanghai 200433, China
| | - Yu-Zhen Zhang
- Department of Chemistry, Research Center for Molecular Recognition and Synthesis, Fudan University, Shanghai 200433, China
| | - Chao Zheng
- State Key Laboratory of Organometallic Chemistry, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, Shanghai 200032, China
| | - Quan Cai
- Department of Chemistry, Research Center for Molecular Recognition and Synthesis, Fudan University, Shanghai 200433, China
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3
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Liang W, Chen ZJ, Ran LH, Chen L. A Palladium-Catalyzed Borylation/Silica Gel Promoted Hydrolysis Sequence for the Synthesis of Hydroquinine-6'-Boric Acid and Its Applications. J Org Chem 2023. [PMID: 37471456 DOI: 10.1021/acs.joc.3c00774] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 07/22/2023]
Abstract
Hydroquinine-6'-boric acid was first synthesized via a palladium-catalyzed borylation/silica gel promoted hydrolysis sequence of hydroquinine-derived triflate and bis(pinacolato)diboron. The newly designed chiral building block was subjected to the Suzuki-Miyaura cross-coupling reaction, Petasis reaction, and selenylation reaction, respectively, and all these reactions worked well to afford the corresponding 6'-functionalized hydroquinines with satisfactory results, demonstrating its extraordinary application potency.
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Affiliation(s)
- Wei Liang
- School of Chemistry and Materials Science, Guizhou Normal University, Guiyang 550001, P. R. China
| | - Zheng-Jun Chen
- School of Chemistry and Materials Science, Guizhou Normal University, Guiyang 550001, P. R. China
| | - Long-Hao Ran
- School of Chemistry and Materials Science, Guizhou Normal University, Guiyang 550001, P. R. China
| | - Lin Chen
- School of Chemistry and Materials Science, Guizhou Normal University, Guiyang 550001, P. R. China
- Graduate School of Pharmaceutical Sciences, Kyoto University, Kyoto 606-8501, Japan
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4
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Yu S, Tiekink EH, Vermeeren P, Bickelhaupt FM, Hamlin TA. How Bases Catalyze Diels-Alder Reactions. Chemistry 2023; 29:e202203121. [PMID: 36330879 PMCID: PMC10108159 DOI: 10.1002/chem.202203121] [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: 10/06/2022] [Revised: 11/03/2022] [Accepted: 11/04/2022] [Indexed: 11/06/2022]
Abstract
We have quantum chemically studied the base-catalyzed Diels-Alder (DA) reaction between 3-hydroxy-2-pyrone and N-methylmaleimide using dispersion-corrected density functional theory. The uncatalyzed reaction is slow and is preceded by the extrusion of CO2 via a retro-DA reaction. Base catalysis, for example, by triethylamine, lowers the reaction barrier up to 10 kcal mol-1 , causing the reaction to proceed smoothly at low temperature, which quenches the expulsion of CO2 , yielding efficient access to polyoxygenated natural compounds. Our activation strain analyses reveal that the base accelerates the DA reaction via two distinct electronic mechanisms: i) by the HOMO-raising effect, which enhances the normal electron demand orbital interaction; and ii) by donating charge into 3-hydroxy-2-pyrone which accumulates in its reactive region and promotes strongly stabilizing secondary electrostatic interactions with N-methylmaleimide.
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Affiliation(s)
- Song Yu
- Department of Theoretical ChemistryAmsterdam Institute of Molecular and Life Sciences (AIMMS)Amsterdam Center for Multiscale Modeling (ACMM) Vrije Universiteit AmsterdamDe Boelelaan 10831081 HVAmsterdam(TheNetherlands
| | - Eveline H. Tiekink
- Department of Theoretical ChemistryAmsterdam Institute of Molecular and Life Sciences (AIMMS)Amsterdam Center for Multiscale Modeling (ACMM) Vrije Universiteit AmsterdamDe Boelelaan 10831081 HVAmsterdam(TheNetherlands
| | - Pascal Vermeeren
- Department of Theoretical ChemistryAmsterdam Institute of Molecular and Life Sciences (AIMMS)Amsterdam Center for Multiscale Modeling (ACMM) Vrije Universiteit AmsterdamDe Boelelaan 10831081 HVAmsterdam(TheNetherlands
| | - F. Matthias Bickelhaupt
- Department of Theoretical ChemistryAmsterdam Institute of Molecular and Life Sciences (AIMMS)Amsterdam Center for Multiscale Modeling (ACMM) Vrije Universiteit AmsterdamDe Boelelaan 10831081 HVAmsterdam(TheNetherlands
- Institute for Molecules and Materials (IMM)Radboud UniversityHeyendaalseweg 1356525 AJNijmegen (TheNetherlands
- Department of Chemical SciencesUniversity of JohannesburgAuckland ParkJohannesburg2006South Africa
| | - Trevor A. Hamlin
- Department of Theoretical ChemistryAmsterdam Institute of Molecular and Life Sciences (AIMMS)Amsterdam Center for Multiscale Modeling (ACMM) Vrije Universiteit AmsterdamDe Boelelaan 10831081 HVAmsterdam(TheNetherlands
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5
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Xu M, Cai Q. Progress of Catalytic Asymmetric Diels-Alder Reactions of 2-Pyrones. CHINESE J ORG CHEM 2022. [DOI: 10.6023/cjoc202109025] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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6
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Lu Y, Xu M, Zhang Z, Zhang J, Cai Q. Catalytic Asymmetric Inverse‐Electron‐Demand Diels–Alder Reactions of 2‐Pyrones with Indenes: Total Syntheses of Cephanolides A and B. Angew Chem Int Ed Engl 2021. [DOI: 10.1002/ange.202112223] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Affiliation(s)
- Yang Lu
- Department of Chemistry and Research Center for Molecular Recognition and Synthesis Fudan University 220 Handan Rd. Shanghai 200433 China
| | - Meng‐Meng Xu
- Department of Chemistry and Research Center for Molecular Recognition and Synthesis Fudan University 220 Handan Rd. Shanghai 200433 China
| | - Zhi‐Mao Zhang
- Department of Chemistry and Research Center for Molecular Recognition and Synthesis Fudan University 220 Handan Rd. Shanghai 200433 China
| | - Junliang Zhang
- Department of Chemistry and Research Center for Molecular Recognition and Synthesis Fudan University 220 Handan Rd. Shanghai 200433 China
| | - Quan Cai
- Department of Chemistry and Research Center for Molecular Recognition and Synthesis Fudan University 220 Handan Rd. Shanghai 200433 China
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7
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Lu Y, Xu MM, Zhang ZM, Zhang J, Cai Q. Catalytic Asymmetric Inverse-Electron-Demand Diels-Alder Reactions of 2-Pyrones with Indenes: Total Syntheses of Cephanolides A and B. Angew Chem Int Ed Engl 2021; 60:26610-26615. [PMID: 34668619 DOI: 10.1002/anie.202112223] [Citation(s) in RCA: 19] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/08/2021] [Revised: 10/11/2021] [Indexed: 12/15/2022]
Abstract
An inverse-electron-demand Diels-Alder (IEDDA) reaction could complement the conventional normal-electron-demand Diels-Alder reaction in the synthesis of six-membered carbocycles. However, catalytic asymmetric all-carbon-based IEDDA reactions are underdeveloped. Herein, we disclosed a copper-catalyzed asymmetric IEDDA reaction using electron-deficient 3-carboalkoxyl-2-pyrones and electronically unbiased indenes as reactants. This method enables the rapid and enantioselective construction of a wide range of hexahydrofluorenyl bridged-lactone scaffolds. Using this method, asymmetric total syntheses of cephanolides A and B were accomplished.
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Affiliation(s)
- Yang Lu
- Department of Chemistry and Research Center for Molecular Recognition and Synthesis, Fudan University, 220 Handan Rd., Shanghai, 200433, China
| | - Meng-Meng Xu
- Department of Chemistry and Research Center for Molecular Recognition and Synthesis, Fudan University, 220 Handan Rd., Shanghai, 200433, China
| | - Zhi-Mao Zhang
- Department of Chemistry and Research Center for Molecular Recognition and Synthesis, Fudan University, 220 Handan Rd., Shanghai, 200433, China
| | - Junliang Zhang
- Department of Chemistry and Research Center for Molecular Recognition and Synthesis, Fudan University, 220 Handan Rd., Shanghai, 200433, China
| | - Quan Cai
- Department of Chemistry and Research Center for Molecular Recognition and Synthesis, Fudan University, 220 Handan Rd., Shanghai, 200433, China
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8
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Lin X, Liu X, Wang K, Li Q, Liu Y, Li C. Biomimetic approach to the catalytic enantioselective synthesis of tetracyclic isochroman. Nat Commun 2021; 12:4958. [PMID: 34400633 PMCID: PMC8368254 DOI: 10.1038/s41467-021-25198-y] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/14/2021] [Accepted: 07/22/2021] [Indexed: 11/25/2022] Open
Abstract
Polyketide oligomers containing the structure of tetracyclic isochroman comprise a large class of natural products with diverse activity. However, a general and stereoselective method towards the rapid construction of this structure remains challenging due to the inherent instability and complex stereochemistry of polyketide. By mimicking the biosynthetic pathway of this structurally diverse set of natural products, we herein develop an asymmetric hetero-Diels–Alder reaction of in-situ generated isochromene and ortho-quinonemethide. A broad range of tetracyclic isochroman frameworks are prepared in good yields and excellent stereoinduction (up to 95% ee) from readily available α-propargyl benzyl alcohols and 2-(hydroxylmethyl) phenols under mild conditions. This direct enantioselective cascade reaction is achieved by a Au(I)/chiral Sc(III) bimetallic catalytic system. Experimental studies indicate that the key hetero-Diels-Alder reaction involves a stepwise pathway, and the steric hindrance between in-situ generated isochromene and t-Bu group of Sc(III)/N,N’-dioxide complex is responsible for the enantioselectivity in the hetero-Diels–Alder reaction step. General and stereoselective synthesis of tetracyclic isochroman-containing polyketide oligomers is challenging. Here, the authors report on an Au(I)/chiral Sc(III) bimetallic catalyst for a biomimetic asymmetric hetero-Diels–Alder reaction for in-situ generation of isochromene and ortho-quinonemethide.
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Affiliation(s)
- Xiangfeng Lin
- State Key Laboratory of Catalysis, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian, China.,University of Chinese Academy of Sciences, Beijing, China
| | - Xianghui Liu
- State Key Laboratory of Catalysis, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian, China.,University of Chinese Academy of Sciences, Beijing, China
| | - Kai Wang
- State Key Laboratory of Catalysis, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian, China.,University of Chinese Academy of Sciences, Beijing, China
| | - Qian Li
- State Key Laboratory of Catalysis, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian, China.,University of Chinese Academy of Sciences, Beijing, China
| | - Yan Liu
- State Key Laboratory of Catalysis, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian, China.
| | - Can Li
- State Key Laboratory of Catalysis, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian, China.
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9
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Xu MM, You XY, Zhang YZ, Lu Y, Tan K, Yang L, Cai Q. Enantioselective Synthesis of Axially Chiral Biaryls by Diels-Alder/Retro-Diels-Alder Reaction of 2-Pyrones with Alkynes. J Am Chem Soc 2021; 143:8993-9001. [PMID: 34106720 DOI: 10.1021/jacs.1c04759] [Citation(s) in RCA: 38] [Impact Index Per Article: 12.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
The enantioselective synthesis of axially chiral biaryls by a copper-catalyzed Diels-Alder/retro-Diels-Alder reaction of 2-pyrones with alkynes is reported herein. Using electron-deficient 2-pyrones and electron-rich 1-naphthyl acetylenes as the reaction partners, a broad range of axially chiral biaryl esters are obtained in excellent yields (up to 97% yield) and enantioselectivities (up to >99% ee). DFT calculations reveal the reaction mechanism and provide insights into the origins of the stereoselectivities. The practicality and robustness of this reaction are showcased by gram-scale synthesis. The synthetic utilizations are demonstrated by the amenable transformations of the products.
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Affiliation(s)
- Meng-Meng Xu
- Department of Chemistry, Fudan University, 220 Handan Road, Shanghai 200433, China
| | - Xin-Yu You
- Department of Chemistry, Fudan University, 220 Handan Road, Shanghai 200433, China
| | - Yu-Zhen Zhang
- Department of Chemistry, Fudan University, 220 Handan Road, Shanghai 200433, China
| | - Yang Lu
- Department of Chemistry, Fudan University, 220 Handan Road, Shanghai 200433, China
| | - Kui Tan
- Department of Chemistry, Fudan University, 220 Handan Road, Shanghai 200433, China
| | - Limin Yang
- College of Materials, Chemistry and Chemical Engineering, Hangzhou Normal University, Hangzhou 311121, China
| | - Quan Cai
- Department of Chemistry, Fudan University, 220 Handan Road, Shanghai 200433, China
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10
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Wambua V, Hirschi JS, Vetticatt MJ. Rapid Evaluation of the Mechanism of Buchwald-Hartwig Amination and Aldol Reactions Using Intramolecular 13C Kinetic Isotope Effects. ACS Catal 2021; 11:60-67. [PMID: 34659873 DOI: 10.1021/acscatal.0c04752] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
A practical approach is introduced for the rapid determination of 13C kinetic isotope effects that utilizes a "designed" reactant with two identical reaction sites. The mechanism of the Buchwald-Hartwig amination of tert-butylbromobenzene with primary and secondary amines is investigated under synthetically relevant catalytic conditions using traditional intermolecular 13C NMR methodology at natural abundance. Switching to 1,4-dibromobenzene, a symmetric bromoarene as the designed reactant, the same experimental 13C KIEs are determined using an intramolecular KIE approach. This rapid methodology for KIE determination requires substantially less material and time compared to traditional approaches. Details of the Buchwald-Hartwig amination mechanism are investigated under varying synthetic conditions, namely a variety of halides and bases. The enantioselectivity-determining step of the l-proline catalyzed aldol reaction is also evaluated using this approach. We expect this mechanistic methodology to gain traction among synthetic chemists as a practical technique to rapidly obtain high-resolution information regarding the transition structure of synthetically relevant reactions under catalytic conditions.
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Affiliation(s)
- Victor Wambua
- 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
| | - Mathew J. Vetticatt
- Department of Chemistry, Binghamton University, Binghamton, New York 13902, United States
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11
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Miskov‐Pajic V, Willig F, Wanner DM, Frey W, Peters R. Enantiodivergent [4+2] Cycloaddition of Dienolates by Polyfunctional Lewis Acid/Zwitterion Catalysis. Angew Chem Int Ed Engl 2020. [DOI: 10.1002/ange.202009093] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Vukoslava Miskov‐Pajic
- Universität Stuttgart Institut für Organische Chemie Pfaffenwaldring 55 70569 Stuttgart Germany
| | - Felix Willig
- Universität Stuttgart Institut für Organische Chemie Pfaffenwaldring 55 70569 Stuttgart Germany
| | - Daniel M. Wanner
- Universität Stuttgart Institut für Organische Chemie Pfaffenwaldring 55 70569 Stuttgart Germany
| | - Wolfgang Frey
- Universität Stuttgart Institut für Organische Chemie Pfaffenwaldring 55 70569 Stuttgart Germany
| | - René Peters
- Universität Stuttgart Institut für Organische Chemie Pfaffenwaldring 55 70569 Stuttgart Germany
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12
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Miskov‐Pajic V, Willig F, Wanner DM, Frey W, Peters R. Enantiodivergent [4+2] Cycloaddition of Dienolates by Polyfunctional Lewis Acid/Zwitterion Catalysis. Angew Chem Int Ed Engl 2020; 59:19873-19877. [PMID: 32697020 PMCID: PMC7693193 DOI: 10.1002/anie.202009093] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/03/2020] [Indexed: 12/23/2022]
Abstract
Diels-Alder reactions have become established as one of the most effective ways to prepare stereochemically complex six-membered rings. Different catalysis concepts have been reported, including dienophile activation by Lewis acids or H-bond donors and diene activation by bases. Herein we report a new concept, in which an acidic prodiene is acidified by a Lewis acid to facilitate deprotonation by an imidazolium-aryloxide entity within a polyfunctional catalyst. A metal dienolate is thus formed, while an imidazolium-ArOH moiety probably forms hydrogen bonds with the dienophile. The catalyst type, readily prepared in few steps in high overall yield, was applied to 3-hydroxy-2-pyrone and 3-hydroxy-2-pyridone as well as cyclopentenone prodienes. Maleimide, maleic anhydride, and nitroolefin dienophiles were employed. Kinetic, spectroscopic, and control experiments support a cooperative mode of action. High enantioselectivity was observed even with unprecedented TONs of up to 3680.
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Affiliation(s)
- Vukoslava Miskov‐Pajic
- Universität StuttgartInstitut für Organische ChemiePfaffenwaldring 5570569StuttgartGermany
| | - Felix Willig
- Universität StuttgartInstitut für Organische ChemiePfaffenwaldring 5570569StuttgartGermany
| | - Daniel M. Wanner
- Universität StuttgartInstitut für Organische ChemiePfaffenwaldring 5570569StuttgartGermany
| | - Wolfgang Frey
- Universität StuttgartInstitut für Organische ChemiePfaffenwaldring 5570569StuttgartGermany
| | - René Peters
- Universität StuttgartInstitut für Organische ChemiePfaffenwaldring 5570569StuttgartGermany
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13
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Supramolecular Diversity of Oxabicyclo[2.2.2]octenes Formed between Substituted 2H-Pyran-2-ones and Vinyl-Moiety-Containing Dienophiles. Symmetry (Basel) 2020. [DOI: 10.3390/sym12101714] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023] Open
Abstract
In Diels–Alder reactions, 2H-pyran-2-ones as dienes can yield a large variety of cycloadducts with up to four contiguous carbon stereogenic centers. Some of the potentially most useful, however difficult to prepare due to their low thermal stability, are the primary CO2-containing oxabicyclo[2.2.2]octenes, which could be formed as eight distinctive isomers (two sets of regioisomers, each of these composed of four different stereoisomers). A high-pressure synthesis of such products was recently described in a few cases where vinyl-moiety-containing dienophiles were used as synthetic equivalents of acetylene. However, structures of the primary products have been so far only rarely investigated in detail. Herein, we present seven novel single-crystal X-ray diffraction structures of such cycloadducts of both stereoisomeric forms, i.e., endo and exo. Additionally, we present a single-crystal structure of a rare case of a cyclohexadiene system stable at room temperature, obtained as a secondary product upon the retro-hetero-Diels–Alder elimination of CO2 under thermal conditions (microwave irradiation), during this elimination the symmetry is increased and out of eight initially possible isomers of the reactant, this number in the product is decreased to four. In oxabicyclo[2.2.2]octene compounds, centrosymmetric hydrogen bonding was found to be the predominant motif and diverse supramolecular patterns were observed due to rich variety of C–H⋯O and C–H⋯π interactions.
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14
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Si XG, Zhang ZM, Zheng CG, Li ZT, Cai Q. Enantioselective Synthesis of cis-Decalin Derivatives by the Inverse-Electron-Demand Diels-Alder Reaction of 2-Pyrones. Angew Chem Int Ed Engl 2020; 59:18412-18417. [PMID: 32662155 DOI: 10.1002/anie.202006841] [Citation(s) in RCA: 21] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/12/2020] [Indexed: 01/08/2023]
Abstract
A novel strategy for the synthesis of cis-decalins by an ytterbium-catalyzed asymmetric inverse-electron-demand Diels-Alder reaction of 2-pyrones and silyl cyclohexadienol ethers is reported here. A broad range of synthetically important cis-decalin derivatives with multiple contiguous stereogenic centers and functionalities are obtained in good yields and stereoselectivities. A full set of diastereomeric substituted cis-decalin motifs are readily accessible by tuning the absolute configurations of substituted silyl cyclohexadienol ethers (R or S) as well as the ligands (R or S). The synthetic potential is showcased by the enantioselective total synthesis of 4-amorphen-11-ol, and further demonstrated by the first total synthesis of cis-crotonin.
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Affiliation(s)
- Xu-Ge Si
- Department of Chemistry, Fudan University, 220 Handan Rd., Shanghai, 200433, China
| | - Zhi-Mao Zhang
- Department of Chemistry, Fudan University, 220 Handan Rd., Shanghai, 200433, China
| | - Cheng-Gong Zheng
- Department of Chemistry, Fudan University, 220 Handan Rd., Shanghai, 200433, China
| | - Zhan-Ting Li
- Department of Chemistry, Fudan University, 220 Handan Rd., Shanghai, 200433, China
| | - Quan Cai
- Department of Chemistry, Fudan University, 220 Handan Rd., Shanghai, 200433, China
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15
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Si X, Zhang Z, Zheng C, Li Z, Cai Q. Enantioselective Synthesis of
cis
‐Decalin Derivatives by the Inverse‐Electron‐Demand Diels–Alder Reaction of 2‐Pyrones. Angew Chem Int Ed Engl 2020. [DOI: 10.1002/ange.202006841] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Xu‐Ge Si
- Department of Chemistry Fudan University 220 Handan Rd. Shanghai 200433 China
| | - Zhi‐Mao Zhang
- Department of Chemistry Fudan University 220 Handan Rd. Shanghai 200433 China
| | - Cheng‐Gong Zheng
- Department of Chemistry Fudan University 220 Handan Rd. Shanghai 200433 China
| | - Zhan‐Ting Li
- Department of Chemistry Fudan University 220 Handan Rd. Shanghai 200433 China
| | - Quan Cai
- Department of Chemistry Fudan University 220 Handan Rd. Shanghai 200433 China
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16
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Zhang X, Beaudry CM. Synthesis of Highly Substituted Phenols and Benzenes with Complete Regiochemical Control. Org Lett 2020; 22:6086-6090. [PMID: 32687369 DOI: 10.1021/acs.orglett.0c02157] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Substituted phenols are requisite molecules for human health, agriculture, and diverse synthetic materials. We report a chemical synthesis of phenols, including penta-substituted phenols, that accommodates programmable substitution at any position. This method uses a one-step conversion of readily available hydroxypyrone and nitroalkene starting materials to give phenols with complete regiochemical control and in high chemical yield. Additionally, the phenols can be converted into highly and even fully substituted benzenes.
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Affiliation(s)
- Xiaojie Zhang
- Department of Chemistry, Oregon State University, 153 Gilbert Hall, Corvallis, Oregon 97331, United States
| | - Christopher M Beaudry
- Department of Chemistry, Oregon State University, 153 Gilbert Hall, Corvallis, Oregon 97331, United States
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17
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Liang X, Zhao Y, Si X, Xu M, Tan J, Zhang Z, Zheng C, Zheng C, Cai Q. Enantioselective Synthesis of Arene
cis
‐Dihydrodiols from 2‐Pyrones. Angew Chem Int Ed Engl 2019; 58:14562-14567. [DOI: 10.1002/anie.201908284] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/04/2019] [Indexed: 01/13/2023]
Affiliation(s)
- Xiao‐Wei Liang
- Department of Chemistry and Research Center for Molecular Recognition and Synthesis Fudan University 220 Handan Rd. Shanghai 200433 China
| | - Yunlong Zhao
- Department of Chemistry and Research Center for Molecular Recognition and Synthesis Fudan University 220 Handan Rd. Shanghai 200433 China
| | - Xu‐Ge Si
- Department of Chemistry and Research Center for Molecular Recognition and Synthesis Fudan University 220 Handan Rd. Shanghai 200433 China
| | - Meng‐Meng Xu
- Department of Chemistry and Research Center for Molecular Recognition and Synthesis Fudan University 220 Handan Rd. Shanghai 200433 China
| | - Jia‐Hao Tan
- Department of Chemistry and Research Center for Molecular Recognition and Synthesis Fudan University 220 Handan Rd. Shanghai 200433 China
| | - Zhi‐Mao Zhang
- Department of Chemistry and Research Center for Molecular Recognition and Synthesis Fudan University 220 Handan Rd. Shanghai 200433 China
| | - Cheng‐Gong Zheng
- Department of Chemistry and Research Center for Molecular Recognition and Synthesis Fudan University 220 Handan Rd. Shanghai 200433 China
| | - Chao Zheng
- State Key Laboratory of Organometallic Chemistry Shanghai Institute of Organic Chemistry Chinese Academy of Sciences 345 Lingling Rd. Shanghai 200032 China
| | - Quan Cai
- Department of Chemistry and Research Center for Molecular Recognition and Synthesis Fudan University 220 Handan Rd. Shanghai 200433 China
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18
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Liang X, Zhao Y, Si X, Xu M, Tan J, Zhang Z, Zheng C, Zheng C, Cai Q. Enantioselective Synthesis of Arene
cis
‐Dihydrodiols from 2‐Pyrones. Angew Chem Int Ed Engl 2019. [DOI: 10.1002/ange.201908284] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Affiliation(s)
- Xiao‐Wei Liang
- Department of Chemistry and Research Center for Molecular Recognition and Synthesis Fudan University 220 Handan Rd. Shanghai 200433 China
| | - Yunlong Zhao
- Department of Chemistry and Research Center for Molecular Recognition and Synthesis Fudan University 220 Handan Rd. Shanghai 200433 China
| | - Xu‐Ge Si
- Department of Chemistry and Research Center for Molecular Recognition and Synthesis Fudan University 220 Handan Rd. Shanghai 200433 China
| | - Meng‐Meng Xu
- Department of Chemistry and Research Center for Molecular Recognition and Synthesis Fudan University 220 Handan Rd. Shanghai 200433 China
| | - Jia‐Hao Tan
- Department of Chemistry and Research Center for Molecular Recognition and Synthesis Fudan University 220 Handan Rd. Shanghai 200433 China
| | - Zhi‐Mao Zhang
- Department of Chemistry and Research Center for Molecular Recognition and Synthesis Fudan University 220 Handan Rd. Shanghai 200433 China
| | - Cheng‐Gong Zheng
- Department of Chemistry and Research Center for Molecular Recognition and Synthesis Fudan University 220 Handan Rd. Shanghai 200433 China
| | - Chao Zheng
- State Key Laboratory of Organometallic Chemistry Shanghai Institute of Organic Chemistry Chinese Academy of Sciences 345 Lingling Rd. Shanghai 200032 China
| | - Quan Cai
- Department of Chemistry and Research Center for Molecular Recognition and Synthesis Fudan University 220 Handan Rd. Shanghai 200433 China
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19
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Affiliation(s)
- Quan Cai
- Department of Chemistry and Research Center for Molecular Recognition and SynthesisFudan University, 220 Handan Rd Shanghai 200433 China
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20
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Hammer N, Erickson JD, Lauridsen VH, Jakobsen JB, Hansen BK, Jacobsen KM, Poulsen TB, Jørgensen KA. Catalytic Asymmetric [4+2]‐Cycloadditions Using Tropolones: Developments, Scope, Transformations, and Bioactivity. Angew Chem Int Ed Engl 2018; 57:13216-13220. [DOI: 10.1002/anie.201808221] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/18/2018] [Revised: 08/13/2018] [Indexed: 11/09/2022]
Affiliation(s)
- Niels Hammer
- Department of ChemistryAarhus University 8000 Aarhus C Denmark
| | | | | | | | - Bente K. Hansen
- Department of ChemistryAarhus University 8000 Aarhus C Denmark
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21
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Hammer N, Erickson JD, Lauridsen VH, Jakobsen JB, Hansen BK, Jacobsen KM, Poulsen TB, Jørgensen KA. Catalytic Asymmetric [4+2]‐Cycloadditions Using Tropolones: Developments, Scope, Transformations, and Bioactivity. Angew Chem Int Ed Engl 2018. [DOI: 10.1002/ange.201808221] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Niels Hammer
- Department of ChemistryAarhus University 8000 Aarhus C Denmark
| | | | | | | | - Bente K. Hansen
- Department of ChemistryAarhus University 8000 Aarhus C Denmark
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22
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Li Z, Hu B, Wu Y, Fei C, Deng L. Control of chemoselectivity in asymmetric tandem reactions: Direct synthesis of chiral amines bearing nonadjacent stereocenters. Proc Natl Acad Sci U S A 2018; 115:1730-1735. [PMID: 29432161 PMCID: PMC5828615 DOI: 10.1073/pnas.1718474115] [Citation(s) in RCA: 50] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023] Open
Abstract
This paper describes the mechanistic insight-guided development of a catalyst system, employing a phenolic proton donor catalyst in addition to a cinchonium-derived phase-transfer catalyst, to control the chemoselectivity of two distinct intermediates, thereby enabling the desired asymmetric tandem conjugate addition-protonation pathway to dominate over a number of side-reaction pathways to provide a synthetic approach for the direct generation of optically active amines bearing two nonadjacent stereocenters.
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Affiliation(s)
- Zhe Li
- Department of Chemistry, Brandeis University, Waltham, MA 02454-9110
| | - Bin Hu
- Department of Chemistry, Brandeis University, Waltham, MA 02454-9110
| | - Yongwei Wu
- Department of Chemistry, Brandeis University, Waltham, MA 02454-9110
| | - Chao Fei
- Department of Chemistry, Brandeis University, Waltham, MA 02454-9110
| | - Li Deng
- Department of Chemistry, Brandeis University, Waltham, MA 02454-9110
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23
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Liu L, Cotelle Y, Bornhof AB, Besnard C, Sakai N, Matile S. Anion-π Catalysis of Diels-Alder Reactions. Angew Chem Int Ed Engl 2017. [DOI: 10.1002/ange.201707730] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Le Liu
- Department of Organic Chemistry; University of Geneva; Geneva Switzerland
| | - Yoann Cotelle
- Department of Organic Chemistry; University of Geneva; Geneva Switzerland
| | - Anna-Bea Bornhof
- Department of Organic Chemistry; University of Geneva; Geneva Switzerland
| | - Céline Besnard
- Department of Organic Chemistry; University of Geneva; Geneva Switzerland
| | - Naomi Sakai
- Department of Organic Chemistry; University of Geneva; Geneva Switzerland
| | - Stefan Matile
- Department of Organic Chemistry; University of Geneva; Geneva Switzerland
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24
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Liu L, Cotelle Y, Bornhof AB, Besnard C, Sakai N, Matile S. Anion-π Catalysis of Diels-Alder Reactions. Angew Chem Int Ed Engl 2017; 56:13066-13069. [DOI: 10.1002/anie.201707730] [Citation(s) in RCA: 33] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/28/2017] [Indexed: 12/13/2022]
Affiliation(s)
- Le Liu
- Department of Organic Chemistry; University of Geneva; Geneva Switzerland
| | - Yoann Cotelle
- Department of Organic Chemistry; University of Geneva; Geneva Switzerland
| | - Anna-Bea Bornhof
- Department of Organic Chemistry; University of Geneva; Geneva Switzerland
| | - Céline Besnard
- Department of Organic Chemistry; University of Geneva; Geneva Switzerland
| | - Naomi Sakai
- Department of Organic Chemistry; University of Geneva; Geneva Switzerland
| | - Stefan Matile
- Department of Organic Chemistry; University of Geneva; Geneva Switzerland
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25
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Shi LM, Dong WW, Tao HY, Dong XQ, Wang CJ. Catalytic Asymmetric Desymmetrization of Cyclopentendiones via Diels–Alder Reaction of 3-Hydroxy-2-pyrones: Construction of Multifunctional Bridged Tricyclic Lactones. Org Lett 2017; 19:4532-4535. [DOI: 10.1021/acs.orglett.7b02107] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
Affiliation(s)
- Li-Min Shi
- College
of Chemistry and Molecular Sciences, Wuhan University, Wuhan, 430072, China
- State
Key Laboratory of Organometallic Chemistry, Shanghai Institute of Organic Chemistry, Shanghai, 230012, China
| | - Wu-Wei Dong
- College
of Chemistry and Molecular Sciences, Wuhan University, Wuhan, 430072, China
- State
Key Laboratory of Organometallic Chemistry, Shanghai Institute of Organic Chemistry, Shanghai, 230012, China
| | - Hai-Yan Tao
- College
of Chemistry and Molecular Sciences, Wuhan University, Wuhan, 430072, China
- State
Key Laboratory of Elemento-organic Chemistry, Nankai University, Tianjin, 300071, China
| | - Xiu-Qin Dong
- College
of Chemistry and Molecular Sciences, Wuhan University, Wuhan, 430072, China
| | - Chun-Jiang Wang
- College
of Chemistry and Molecular Sciences, Wuhan University, Wuhan, 430072, China
- State
Key Laboratory of Organometallic Chemistry, Shanghai Institute of Organic Chemistry, Shanghai, 230012, China
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26
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Ni X, Li X, Cheng JP. Equilibrium acidities of cinchona alkaloid organocatalysts bearing 6′-hydrogen bonding donors in DMSO. Org Chem Front 2016. [DOI: 10.1039/c5qo00305a] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Abstract
The pKa values of 18 cinchona alkaloid based organocatalysts bearing 6′-hydrogen bonding donors were determined by the overlapping indicator method in DMSO via UV spectrophotometric titrations. The pKa values are in the range of 6.76–20.24.
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Affiliation(s)
- Xiang Ni
- State Key Laboratory of Elemento-Organic Chemistry
- Department of Chemistry
- Nankai University
- Tianjin 300071
- China
| | - Xin Li
- State Key Laboratory of Elemento-Organic Chemistry
- Department of Chemistry
- Nankai University
- Tianjin 300071
- China
| | - Jin-Pei Cheng
- Collaborative Innovation Center of Chemical Science and Engineering
- Tianjin 300071
- China
- Center of Basic Molecular Science
- Department of Chemistry
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27
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Ashokkumar V, Balasaravanan R, Sadhasivam V, Jenofar SM, Siva A. A new class of bifunctional chiral phase transfer catalysts for highly enantioselective asymmetric epoxidation of α,β-unsaturated ketones at ambient temperature. ACTA ACUST UNITED AC 2015. [DOI: 10.1016/j.molcata.2015.08.016] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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28
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Wang F, Yang C, Xue XS, Li X, Cheng JP. A Highly Efficient Chirality Switchable Synthesis of Dihydropyran-Fused Benzofurans by Fine-Tuning the Phenolic Proton of β-Isocupreidine (β-ICD) Catalyst with Methyl. Chemistry 2015; 21:10443-9. [PMID: 26059531 DOI: 10.1002/chem.201501145] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/23/2015] [Indexed: 01/03/2023]
Abstract
A highly enantioselective β-isocupreidine (β-ICD) catalyzed synthesis of dihydropyran-fused benzofurans through [4+2] cycloaddition of allenoates and benzofuranone alkenes was developed. Switchable chirality inversion of cycloaddition products was achieved by replacing the phenolic proton of the catalyst with a methyl, demonstrating an amazing effect of minimal structural variation on inverting enantioselectivity. DFT calculations were utilized to elucidate the origin of the observed phenomena. Computation also provided a clue for a rational design in which the multi-hydrogen bond with the alcohol additive was found to improve the enantioselectivity of the cycloaddition. Finally, the substrate scope was examined, in which a number of functionalized dihydropyran-fused benzofurans could be obtained in high yields (up to 97 %) with very good regio- (>20:1) and enantioselectivities (up to 98:2 e.r.).
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Affiliation(s)
- Feng Wang
- State Key Laboratory of Elemento-Organic Chemistry, Collaborative Innovation Center of Chemical Science and Engineering, Department of Chemistry, Nankai University, Tianjin 300071 (P.R. China)
| | - Chen Yang
- State Key Laboratory of Elemento-Organic Chemistry, Collaborative Innovation Center of Chemical Science and Engineering, Department of Chemistry, Nankai University, Tianjin 300071 (P.R. China)
| | - Xiao-Song Xue
- State Key Laboratory of Elemento-Organic Chemistry, Collaborative Innovation Center of Chemical Science and Engineering, Department of Chemistry, Nankai University, Tianjin 300071 (P.R. China)
| | - Xin Li
- State Key Laboratory of Elemento-Organic Chemistry, Collaborative Innovation Center of Chemical Science and Engineering, Department of Chemistry, Nankai University, Tianjin 300071 (P.R. China).
| | - Jin-Pei Cheng
- State Key Laboratory of Elemento-Organic Chemistry, Collaborative Innovation Center of Chemical Science and Engineering, Department of Chemistry, Nankai University, Tianjin 300071 (P.R. China).
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29
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DMAP-catalyzed Diels–Alder reaction of 3-hydroxy-2-pyrone and methyleneindolinones for the synthesis of spirocyclic oxindoles. Tetrahedron 2015. [DOI: 10.1016/j.tet.2015.04.032] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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30
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31
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Dell’Amico L, Rassu G, Zambrano V, Sartori A, Curti C, Battistini L, Pelosi G, Casiraghi G, Zanardi F. Exploring the Vinylogous Reactivity of Cyclohexenylidene Malononitriles: Switchable Regioselectivity in the Organocatalytic Asymmetric Addition to Enals Giving Highly Enantioenriched Carbabicyclic Structures. J Am Chem Soc 2014; 136:11107-14. [DOI: 10.1021/ja5054576] [Citation(s) in RCA: 94] [Impact Index Per Article: 9.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Affiliation(s)
- Luca Dell’Amico
- Dipartimento
di Farmacia, Università degli Studi di Parma, Parco Area
delle Scienze 27A, 43124 Parma, Italy
| | - Gloria Rassu
- Istituto di Chimica
Biomolecolare, Consiglio Nazionale delle Ricerche, Traversa La Crucca 3, 07100 Li Punti Sassari, Italy
| | - Vincenzo Zambrano
- Istituto di Chimica
Biomolecolare, Consiglio Nazionale delle Ricerche, Traversa La Crucca 3, 07100 Li Punti Sassari, Italy
| | - Andrea Sartori
- Dipartimento
di Farmacia, Università degli Studi di Parma, Parco Area
delle Scienze 27A, 43124 Parma, Italy
| | - Claudio Curti
- Dipartimento
di Farmacia, Università degli Studi di Parma, Parco Area
delle Scienze 27A, 43124 Parma, Italy
| | - Lucia Battistini
- Dipartimento
di Farmacia, Università degli Studi di Parma, Parco Area
delle Scienze 27A, 43124 Parma, Italy
| | - Giorgio Pelosi
- Dipartimento
di Chimica, Università degli Studi di Parma, Parco Area
delle Scienze 17A, 43124 Parma, Italy
| | - Giovanni Casiraghi
- Dipartimento
di Farmacia, Università degli Studi di Parma, Parco Area
delle Scienze 27A, 43124 Parma, Italy
| | - Franca Zanardi
- Dipartimento
di Farmacia, Università degli Studi di Parma, Parco Area
delle Scienze 27A, 43124 Parma, Italy
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32
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Rodrigo E, García Ruano JL, Cid MB. Organocatalytic Michael Addition/Intramolecular Julia–Kocienski Olefination for the Preparation of Nitrocyclohexenes. J Org Chem 2013; 78:10737-46. [DOI: 10.1021/jo401686u] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
Affiliation(s)
- Eduardo Rodrigo
- Department of Organic Chemistry. Universidad Autónoma de Madrid, Cantoblanco 28049, Madrid, Spain
| | - José Luis García Ruano
- Department of Organic Chemistry. Universidad Autónoma de Madrid, Cantoblanco 28049, Madrid, Spain
| | - M. Belén Cid
- Department of Organic Chemistry. Universidad Autónoma de Madrid, Cantoblanco 28049, Madrid, Spain
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33
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34
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Scheffler U, Mahrwald R. Recent Advances in Organocatalytic Methods for Asymmetric CC Bond Formation. Chemistry 2013; 19:14346-96. [DOI: 10.1002/chem.201301996] [Citation(s) in RCA: 178] [Impact Index Per Article: 16.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
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35
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Peng Z, Narcis MJ, Takenaka N. Enantio- and periselective nitroalkene Diels-Alder reactions catalyzed by helical-chiral hydrogen bond donor catalysts. Molecules 2013; 18:9982-98. [PMID: 23966083 PMCID: PMC6270221 DOI: 10.3390/molecules18089982] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/15/2013] [Revised: 08/13/2013] [Accepted: 08/14/2013] [Indexed: 11/24/2022] Open
Abstract
Helical-chiral double hydrogen bond donor catalysts promote the nitroalkene Diels-Alder reaction in an enantio- and periselective manner. This represents the first asymmetric catalytic nitroalkene Diels-Alder reaction via LUMO-lowering catalysis. To gain an insight into this new process, the substrate scope of our catalyst was investigated by exploiting readily available 5-substituted pentamethylcyclopentadienes. The catalyst was found to tolerate dienes with different steric demands as well as dienes substituted with heteroatoms. The synthetic utility of 5-substituted pentamethylcyclopentadienes is rather limited, and thus we have developed a three-step route to 1,4,5,5-tetrasubstituted cyclopentadienes from commercially available ketones.
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Affiliation(s)
| | | | - Norito Takenaka
- Author to whom correspondence should be addressed; E-Mail: ; Tel.: +1-305-284-3279; Fax: +1-305-284-4571
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36
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Wei MX, Wang CT, Du JY, Qu H, Yin PR, Bao X, Ma XY, Zhao XH, Zhang GB, Fan CA. Enantioselective synthesis of Amaryllidaceae alkaloids (+)-vittatine, (+)-epi-vittatine, and (+)-buphanisine. Chem Asian J 2013; 8:1966-71. [PMID: 23788411 DOI: 10.1002/asia.201300595] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/28/2013] [Indexed: 11/10/2022]
Abstract
Cat. on a hot tin roof: Enantioselective catalytic Michael addition of α-cyanoketones to acrylates under bifunctional organocatalysis was used to construct the unique arylic all-carbon quaternary stereocenter, which is synthetically crucial in the chemical synthesis of optically pure cis-aryl hydroindole alkaloids. The protocol offers an asymmetric route to (+)-vittatine, (+)-epi-vittatine, and (+)-buphanisine.
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Affiliation(s)
- Meng-Xue Wei
- State Key Laboratory of Applied Organic Chemistry, College of Chemistry and Chemical Engineering, Lanzhou University, 222 Tianshui Nanlu, Lanzhou 730000, China
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37
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Xue XS, Li X, Yu A, Yang C, Song C, Cheng JP. Mechanism and Selectivity of Bioinspired Cinchona Alkaloid Derivatives Catalyzed Asymmetric Olefin Isomerization: A Computational Study. J Am Chem Soc 2013; 135:7462-73. [DOI: 10.1021/ja309133z] [Citation(s) in RCA: 60] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Affiliation(s)
- Xiao-Song Xue
- State
Key Laboratory of Elemento-Organic Chemistry, §Computational Center of Molecular
Science, and ‡Central Laboratory, College of Chemistry, Nankai University, Tianjin 300071, China
| | - Xin Li
- State
Key Laboratory of Elemento-Organic Chemistry, §Computational Center of Molecular
Science, and ‡Central Laboratory, College of Chemistry, Nankai University, Tianjin 300071, China
| | - Ao Yu
- State
Key Laboratory of Elemento-Organic Chemistry, §Computational Center of Molecular
Science, and ‡Central Laboratory, College of Chemistry, Nankai University, Tianjin 300071, China
| | - Chen Yang
- State
Key Laboratory of Elemento-Organic Chemistry, §Computational Center of Molecular
Science, and ‡Central Laboratory, College of Chemistry, Nankai University, Tianjin 300071, China
| | - Chan Song
- State
Key Laboratory of Elemento-Organic Chemistry, §Computational Center of Molecular
Science, and ‡Central Laboratory, College of Chemistry, Nankai University, Tianjin 300071, China
| | - Jin-Pei Cheng
- State
Key Laboratory of Elemento-Organic Chemistry, §Computational Center of Molecular
Science, and ‡Central Laboratory, College of Chemistry, Nankai University, Tianjin 300071, China
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38
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Chen XY, Sun LH, Ye S. N-Heterocyclic Carbene Catalyzed [4+2] Cycloaddition of Nitroalkenes with Oxodienes. Chemistry 2013; 19:4441-5. [DOI: 10.1002/chem.201204539] [Citation(s) in RCA: 48] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2012] [Indexed: 11/12/2022]
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39
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Narcis MJ, Sprague DJ, Captain B, Takenaka N. Enantio- and periselective nitroalkene Diels–Alder reaction. Org Biomol Chem 2012; 10:9134-6. [DOI: 10.1039/c2ob26674a] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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40
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Meyer MP. New Applications of Isotope Effects in the Determination of Organic Reaction Mechanisms. ADVANCES IN PHYSICAL ORGANIC CHEMISTRY 2012. [DOI: 10.1016/b978-0-12-398484-5.00002-x] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/04/2022]
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41
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Bernardi L, Fochi M, Comes Franchini M, Ricci A. Bioinspired organocatalytic asymmetric reactions. Org Biomol Chem 2012; 10:2911-22. [DOI: 10.1039/c2ob07037e] [Citation(s) in RCA: 90] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
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42
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Chauhan P, Chimni SS. Aromatic hydroxyl group—a hydrogen bonding activator in bifunctional asymmetric organocatalysis. RSC Adv 2012. [DOI: 10.1039/c1ra00872b] [Citation(s) in RCA: 68] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
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