1
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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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2
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He F, Sun Z, Li C, Jiang Z, Miao H, Li Q, Wu C. Regioselective [2 + 1] photocycloaddition of 2-pyridones with diazo compounds. Org Biomol Chem 2023; 21:8273-8278. [PMID: 37812037 DOI: 10.1039/d3ob01354e] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/10/2023]
Abstract
Herein, we report a novel regioselective [2 + 1] cyclization reaction of 2-pyridones with carbenes generated in situ via visible light irradiation, without the requirement for catalysts or additives. The diverse functional groups of 2-pyridones and diazo compounds exhibit good tolerance, enabling the rapid synthesis of highly valuable cyclopropanated dihydro-2-pyridone scaffolds with exceptional regio- and stereoselectivity. Furthermore, DFT calculations provide a comprehensive explanation for the regio- and stereoselectivity observed in the reaction.
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Affiliation(s)
- Fengya He
- Key Laboratory of Xin'an Medicine, Ministry of Education, Anhui University of Chinese Medicine, Hefei, Anhui, 230038, P. R. China.
| | - Ziyi Sun
- Key Laboratory of Xin'an Medicine, Ministry of Education, Anhui University of Chinese Medicine, Hefei, Anhui, 230038, P. R. China.
| | - Chenyue Li
- Key Laboratory of Xin'an Medicine, Ministry of Education, Anhui University of Chinese Medicine, Hefei, Anhui, 230038, P. R. China.
| | - Zibin Jiang
- Key Laboratory of Xin'an Medicine, Ministry of Education, Anhui University of Chinese Medicine, Hefei, Anhui, 230038, P. R. China.
| | - Hui Miao
- Anhui Province Key Laboratory of Environmental Hormone and Reproduction, School of Biological and Food Engineering, Fuyang Normal University, Fuyang, Anhui, 236037, P. R. China.
| | - Qinglin Li
- Key Laboratory of Xin'an Medicine, Ministry of Education, Anhui University of Chinese Medicine, Hefei, Anhui, 230038, P. R. China.
| | - Chenggui Wu
- Key Laboratory of Xin'an Medicine, Ministry of Education, Anhui University of Chinese Medicine, Hefei, Anhui, 230038, P. R. China.
- Anhui Province Key Laboratory of Environmental Hormone and Reproduction, School of Biological and Food Engineering, Fuyang Normal University, Fuyang, Anhui, 236037, P. R. China.
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3
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Li M, Zhang Z, Ma N, Zhao J, Wu H, Liu Q, Zhang G. Anion Cascade Reactions. Part I: Synthesis of 3-Isoquinuclidones from a Nazarov-like Reagent. Org Lett 2023; 25:6840-6845. [PMID: 37681678 DOI: 10.1021/acs.orglett.3c02355] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 09/09/2023]
Abstract
A simple and atom-economical one-step protocol is described for the synthesis of biologically valuable 3-isoquinuclidones. The method proceeds from the simple starting materials, α-acyl N-arylcinnamamides, and can be performed under mild conditions in the presence of tBuOK. The key steps of this process are the double Michael addition reaction of a Nazarov-like reagent and the subsequent intramolecular hemiamination. These flexible intermolecular reactions could be performed on a gram scale.
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Affiliation(s)
- Mengjuan Li
- Key Laboratory of Green Chemical Media and Reactions, Ministry of Education, Collaborative Innovation Center of Henan Province for Green Manufacturing of Fine Chemicals, NMPA Key Laboratory for Research and Evaluation of Innovative Drugs, and School of Chemistry and Chemical Engineering, Henan Normal University, 46 East of Construction Road, Xinxiang, Henan 453007, China
| | - Zhiguo Zhang
- Key Laboratory of Green Chemical Media and Reactions, Ministry of Education, Collaborative Innovation Center of Henan Province for Green Manufacturing of Fine Chemicals, NMPA Key Laboratory for Research and Evaluation of Innovative Drugs, and School of Chemistry and Chemical Engineering, Henan Normal University, 46 East of Construction Road, Xinxiang, Henan 453007, China
| | - Nana Ma
- Key Laboratory of Green Chemical Media and Reactions, Ministry of Education, Collaborative Innovation Center of Henan Province for Green Manufacturing of Fine Chemicals, NMPA Key Laboratory for Research and Evaluation of Innovative Drugs, and School of Chemistry and Chemical Engineering, Henan Normal University, 46 East of Construction Road, Xinxiang, Henan 453007, China
| | - Jie Zhao
- Key Laboratory of Green Chemical Media and Reactions, Ministry of Education, Collaborative Innovation Center of Henan Province for Green Manufacturing of Fine Chemicals, NMPA Key Laboratory for Research and Evaluation of Innovative Drugs, and School of Chemistry and Chemical Engineering, Henan Normal University, 46 East of Construction Road, Xinxiang, Henan 453007, China
| | - Hao Wu
- Key Laboratory of Green Chemical Media and Reactions, Ministry of Education, Collaborative Innovation Center of Henan Province for Green Manufacturing of Fine Chemicals, NMPA Key Laboratory for Research and Evaluation of Innovative Drugs, and School of Chemistry and Chemical Engineering, Henan Normal University, 46 East of Construction Road, Xinxiang, Henan 453007, China
| | - Qingfeng Liu
- Key Laboratory of Green Chemical Media and Reactions, Ministry of Education, Collaborative Innovation Center of Henan Province for Green Manufacturing of Fine Chemicals, NMPA Key Laboratory for Research and Evaluation of Innovative Drugs, and School of Chemistry and Chemical Engineering, Henan Normal University, 46 East of Construction Road, Xinxiang, Henan 453007, China
| | - Guisheng Zhang
- Key Laboratory of Green Chemical Media and Reactions, Ministry of Education, Collaborative Innovation Center of Henan Province for Green Manufacturing of Fine Chemicals, NMPA Key Laboratory for Research and Evaluation of Innovative Drugs, and School of Chemistry and Chemical Engineering, Henan Normal University, 46 East of Construction Road, Xinxiang, Henan 453007, China
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4
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Loco D, Chataigner I, Piquemal J, Spezia R. Efficient and Accurate Description of Diels-Alder Reactions Using Density Functional Theory. Chemphyschem 2022; 23:e202200349. [PMID: 35696652 PMCID: PMC9796631 DOI: 10.1002/cphc.202200349] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/23/2022] [Revised: 06/11/2022] [Indexed: 01/01/2023]
Abstract
Modeling chemical reactions using Quantum Chemistry is a widely used predictive strategy capable to complement experiments in order to understand the intrinsic mechanisms guiding the chemicals towards the most favorable reaction products. However, at this purpose, it is mandatory to use reliable and computationally tractable theoretical methods. In this work, we focus on six Diels-Alder reactions of increasing complexity and perform an extensive benchmark of middle- to low-cost computational approaches to predict the characteristic reactions energy barriers. We found that Density Functional Theory, using the ωB97XD, LC-ωPBE, CAM-B3LYP, M11 and MN12SX functionals, with empirical dispersion corrections coupled to an affordable 6-31G basis set, provides quality results for this class of reactions, at a small computational effort. Such efficient and reliable simulation protocol opens perspectives for hybrid QM/MM molecular dynamics simulations of Diels-Alder reactions including explicit solvation.
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Affiliation(s)
- Daniele Loco
- Sorbonne Université, Laboratoire de Chimie ThéoriqueUMR 7616 CNRS4 Place Jussieu75005ParisFrance
- Qubit PharmaceuticalsIncubateur Paris Biotech Santé24 rue du Faubourg Saint Jacques75014ParisFrance
| | - Isabelle Chataigner
- Sorbonne Université, Laboratoire de Chimie ThéoriqueUMR 7616 CNRS4 Place Jussieu75005ParisFrance
- Normandie Univ.UNIROUENCNRS, INSA Rouen, COBRA76000RouenFrance
| | - Jean‐Philip Piquemal
- Sorbonne Université, Laboratoire de Chimie ThéoriqueUMR 7616 CNRS4 Place Jussieu75005ParisFrance
| | - Riccardo Spezia
- Sorbonne Université, Laboratoire de Chimie ThéoriqueUMR 7616 CNRS4 Place Jussieu75005ParisFrance
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5
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Rulev AY, Zubkov FI. Hyperbaric reactions in organic synthesis. Progress from 2006 to 2020. Org Biomol Chem 2022; 20:2320-2355. [DOI: 10.1039/d1ob01423d] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
This comprehensive review summarizes the published literature data concerning above 1 kbar reactions for the purposes of preparative organic synthesis (more then 50 mg of the initial substance) from 2006...
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7
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Ben Salah S, Sanselme M, Champavier Y, Othman M, Daïch A, Chataigner I, Martin Lawson A. Five‐Membered Nitrogen Heterocycles Synthesis through 1,3‐Dipolar Cycloaddition of Non‐Stabilized Azomethine Ylides with 2‐Pyridone Heteroaromatic Systems as Dipolarophiles. European J Org Chem 2020. [DOI: 10.1002/ejoc.202001404] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Affiliation(s)
- Sami Ben Salah
- Normandie Université, France UNILEHAVRE, URCOM, EA 3212, INC3 M, FR 3038 CNRS 76600 Le Havre France
| | - Morgane Sanselme
- Normandie Université, France UNIROUEN, Laboratoire SMS EA 3233 1 rue Tesnière, 76821 Mont Saint Aignan France
| | - Yves Champavier
- PEIRENE EA 7500/BISCEm, US042 INSERM, UMS2015 CNRS Centre de Biologie Recherche et Santé 2 rue du Dr Marcland 87025 Limoges Cedex France
| | - Mohamed Othman
- Normandie Université, France UNILEHAVRE, URCOM, EA 3212, INC3 M, FR 3038 CNRS 76600 Le Havre France
| | - Adam Daïch
- Normandie Université, France UNILEHAVRE, URCOM, EA 3212, INC3 M, FR 3038 CNRS 76600 Le Havre France
| | - Isabelle Chataigner
- Normandie Université INSA Rouen, UNIROUEN, CNRS, COBRA Laboratory 76000 Rouen France
- CNRS Sorbonne Université LCT UMR 7616 75005 Paris France
| | - Ata Martin Lawson
- Normandie Université, France UNILEHAVRE, URCOM, EA 3212, INC3 M, FR 3038 CNRS 76600 Le Havre France
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8
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Yuan WC, Zhou XJ, Zhao JQ, Chen YZ, You Y, Wang ZH. Catalytic Enantioselective Dearomatization/Rearomatization of 2-Nitroindoles to Access 3-Indolyl-3′-Aryl-/Alkyloxindoles: Application in the Formal Synthesis of Cyclotryptamine Alkaloids. Org Lett 2020; 22:7088-7093. [DOI: 10.1021/acs.orglett.0c02350] [Citation(s) in RCA: 19] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Affiliation(s)
- Wei-Cheng Yuan
- Institute for Advanced Study, Chengdu University, Chengdu 610106, China
| | - Xiao-Jian Zhou
- Key Laboratory of Biocatalysis & Chiral Drug Synthesis of Guizhou Province, Generic Drug Research Center of Guizhou Province, School of Pharmacy, Zunyi Medical University, Zunyi 563006, China
| | - Jian-Qiang Zhao
- Institute for Advanced Study, Chengdu University, Chengdu 610106, China
| | - Yong-Zheng Chen
- Key Laboratory of Biocatalysis & Chiral Drug Synthesis of Guizhou Province, Generic Drug Research Center of Guizhou Province, School of Pharmacy, Zunyi Medical University, Zunyi 563006, China
| | - Yong You
- Institute for Advanced Study, Chengdu University, Chengdu 610106, China
| | - Zhen-Hua Wang
- Institute for Advanced Study, Chengdu University, Chengdu 610106, China
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9
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Mechanistic insight into thermal 1,3- and 1,5-sulfonyl migrations of N-arenesulfonylphenothiazines and N-arenesulfonylphenoxazines. MONATSHEFTE FUR CHEMIE 2016. [DOI: 10.1007/s00706-016-1661-6] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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10
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Andreini M, Chapellas F, Diab S, Pasturaud K, Piettre SR, Legros J, Chataigner I. Addition of 4-(cyclohex-1-en-1-yl)morpholine on 3-nitroindole: an unprecedented dearomatizing process. Org Biomol Chem 2016; 14:2833-9. [DOI: 10.1039/c5ob02595h] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Nucleophilic enamine2aadd spontaneously on nitroindole1to form a dearomatized formal ene adduct3a.
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Affiliation(s)
| | | | - Sonia Diab
- Normandie Univ
- COBRA
- UMR 6014 et FR 3038
- Univ Rouen
- CNRS
| | | | | | - Julien Legros
- Normandie Univ
- COBRA
- UMR 6014 et FR 3038
- Univ Rouen
- CNRS
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11
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Rai VK, Sahu GP, Rai A. The first NHC-induced regioselective introduction of C- and N-nucleophiles in to Baylis–Hillman enals. Tetrahedron Lett 2015. [DOI: 10.1016/j.tetlet.2015.03.101] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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12
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Andreini M, De Paolis M, Chataigner I. Thiourea-catalyzed dearomatizing [4+2] cycloadditions of 3-nitroindole. CATAL COMMUN 2015. [DOI: 10.1016/j.catcom.2014.07.042] [Citation(s) in RCA: 40] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022] Open
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13
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Awata A, Arai T. PyBidine/Copper Catalyst: Asymmetricexo′-Selective [3+2] Cycloaddition using Imino Ester and Electrophilic Indole. Angew Chem Int Ed Engl 2014; 53:10462-5. [DOI: 10.1002/anie.201405223] [Citation(s) in RCA: 156] [Impact Index Per Article: 15.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/13/2014] [Revised: 06/23/2014] [Indexed: 01/08/2023]
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14
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Awata A, Arai T. PyBidine/Copper Catalyst: Asymmetricexo′-Selective [3+2] Cycloaddition using Imino Ester and Electrophilic Indole. Angew Chem Int Ed Engl 2014. [DOI: 10.1002/ange.201405223] [Citation(s) in RCA: 41] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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15
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Stark DG, Morrill LC, Yeh PP, Slawin AMZ, O'Riordan TJC, Smith AD. Isothiourea-Mediated One-Pot Synthesis of Functionalized Pyridines. Angew Chem Int Ed Engl 2013. [DOI: 10.1002/ange.201306786] [Citation(s) in RCA: 36] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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16
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Stark DG, Morrill LC, Yeh PP, Slawin AMZ, O'Riordan TJC, Smith AD. Isothiourea-mediated one-pot synthesis of functionalized pyridines. Angew Chem Int Ed Engl 2013; 52:11642-6. [PMID: 24106063 PMCID: PMC4065352 DOI: 10.1002/anie.201306786] [Citation(s) in RCA: 98] [Impact Index Per Article: 8.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/02/2013] [Indexed: 11/07/2022]
Abstract
Acids to bases: The synthesis of 2,4,6-trisubstituted pyridines from (phenylthio)acetic acid and a range of α,β-unsaturated ketimines is reported. This process proceeds by intermolecular Michael addition/lactamization, thiophenol elimination, and N- to O-sulfonyl migration, giving 2-sulfonate-substituted pyridines which are readily derivatized to generate structural diversity.
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Affiliation(s)
- Daniel G Stark
- EaStCHEM, School of Chemistry, University of St Andrews, North Haugh, St Andrews, Fife, KY16 9ST (UK) http://ch-www.st-andrews.ac.uk/staff/ads/group/
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17
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Mertens MD, Pietsch M, Schnakenburg G, Gütschow M. Regioselective Sulfonylation and N- to O-Sulfonyl Migration of Quinazolin-4(3H)-ones and Analogous Thienopyrimidin-4(3H)-ones. J Org Chem 2013; 78:8966-79. [DOI: 10.1021/jo4010876] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
Affiliation(s)
- Matthias D. Mertens
- Pharmaceutical
Institute, Pharmaceutical Chemistry I, University of Bonn, An der Immenburg
4, D-53121 Bonn, Germany
| | - Markus Pietsch
- Pharmaceutical
Institute, Pharmaceutical Chemistry I, University of Bonn, An der Immenburg
4, D-53121 Bonn, Germany
| | - Gregor Schnakenburg
- Institute
of Inorganic Chemistry, University of Bonn, Gerhard-Domagk-Strasse 1, D-53121 Bonn, Germany
| | - Michael Gütschow
- Pharmaceutical
Institute, Pharmaceutical Chemistry I, University of Bonn, An der Immenburg
4, D-53121 Bonn, Germany
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18
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Lee S, Diab S, Queval P, Sebban M, Chataigner I, Piettre SR. Aromatic CC Bonds as Dipolarophiles: Facile Reactions of Uncomplexed Electron-Deficient Benzene Derivatives and Other Aromatic Rings with a Non-Stabilized Azomethine Ylide. Chemistry 2013; 19:7181-92. [DOI: 10.1002/chem.201201238] [Citation(s) in RCA: 88] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/11/2012] [Revised: 02/07/2013] [Indexed: 11/07/2022]
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19
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Victoria Gómez M, Aranda AI, Moreno A, Cossío FP, de Cózar A, Díaz-Ortiz Á, de la Hoz A, Prieto P. Microwave-assisted reactions of nitroheterocycles with dienes. Diels–Alder and tandem hetero Diels–Alder/[3,3] sigmatropic shift. Tetrahedron 2009. [DOI: 10.1016/j.tet.2009.04.065] [Citation(s) in RCA: 42] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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20
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Hiroya K, Kawamoto K, Inamoto K, Sakamoto T, Doi T. Synthesis of the core ring system of awajanomycin from N-Boc-3-methoxycarbonyl-2-pyridinone. Tetrahedron Lett 2009. [DOI: 10.1016/j.tetlet.2009.02.141] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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21
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Chopin N, Gérard H, Chataigner I, Piettre SR. Benzofurans as Efficient Dienophiles in Normal Electron Demand [4 + 2] Cycloadditions. J Org Chem 2008; 74:1237-46. [DOI: 10.1021/jo802205d] [Citation(s) in RCA: 44] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Nathalie Chopin
- UMR CNRS 6014, IRCOF, Université de Rouen, 1 Rue Tesnières, F-76821 Mont Saint Aignan, France, and Laboratoire de Chimie Théorique, Université Paris VI, 3, rue Galilée, F-94200 Ivry-sur-Seine, France
| | - Hélène Gérard
- UMR CNRS 6014, IRCOF, Université de Rouen, 1 Rue Tesnières, F-76821 Mont Saint Aignan, France, and Laboratoire de Chimie Théorique, Université Paris VI, 3, rue Galilée, F-94200 Ivry-sur-Seine, France
| | - Isabelle Chataigner
- UMR CNRS 6014, IRCOF, Université de Rouen, 1 Rue Tesnières, F-76821 Mont Saint Aignan, France, and Laboratoire de Chimie Théorique, Université Paris VI, 3, rue Galilée, F-94200 Ivry-sur-Seine, France
| | - Serge R. Piettre
- UMR CNRS 6014, IRCOF, Université de Rouen, 1 Rue Tesnières, F-76821 Mont Saint Aignan, France, and Laboratoire de Chimie Théorique, Université Paris VI, 3, rue Galilée, F-94200 Ivry-sur-Seine, France
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22
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Benito-López F, Egberink RJ, Reinhoudt DN, Verboom W. High pressure in organic chemistry on the way to miniaturization. Tetrahedron 2008. [DOI: 10.1016/j.tet.2008.07.108] [Citation(s) in RCA: 73] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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23
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Chou SSP, Chen PW. Cycloaddition reactions of 4-sulfur-substituted dihydro-2-pyridones and 2-pyridones with conjugated dienes. Tetrahedron 2008. [DOI: 10.1016/j.tet.2007.11.090] [Citation(s) in RCA: 33] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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24
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An expedient route to indoles via a cycloaddition/cyclization sequence from (Z)-1-methoxybut-1-en-3-yne and 2H-pyran-2-ones. Tetrahedron 2008. [DOI: 10.1016/j.tet.2007.10.099] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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