51
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Wang S, Rodríguez-Escrich C, Pericàs MA. Catalytic Asymmetric [8+2] Annulation Reactions Promoted by a Recyclable Immobilized Isothiourea. Angew Chem Int Ed Engl 2017. [DOI: 10.1002/ange.201707341] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
Affiliation(s)
- Shoulei Wang
- Institute of Chemical Research of Catalonia (ICIQ); The Barcelona Institute of Science and Technology; Av. Països Catalans 16 43007 Tarragona Spain
| | - Carles Rodríguez-Escrich
- Institute of Chemical Research of Catalonia (ICIQ); The Barcelona Institute of Science and Technology; Av. Països Catalans 16 43007 Tarragona Spain
| | - Miquel A. Pericàs
- Institute of Chemical Research of Catalonia (ICIQ); The Barcelona Institute of Science and Technology; Av. Països Catalans 16 43007 Tarragona Spain
- Departament de Química Inorgànica i Orgànica; Universitat de Barcelona; 08080 Barcelona Spain
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52
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Miller ZD, Lee BJ, Yoon TP. Enantioselective Crossed Photocycloadditions of Styrenic Olefins by Lewis Acid Catalyzed Triplet Sensitization. Angew Chem Int Ed Engl 2017; 56:11891-11895. [PMID: 28776908 PMCID: PMC5661956 DOI: 10.1002/anie.201706975] [Citation(s) in RCA: 100] [Impact Index Per Article: 14.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/09/2017] [Revised: 07/31/2017] [Indexed: 12/21/2022]
Abstract
The synthesis of unsymmetrical cyclobutanes by controlled heterodimerization of olefins remains a substantial challenge, particularly in an enantiocontrolled fashion. Shown herein is that chiral Lewis acid catalyzed triplet sensitization enables the synthesis of highly enantioenriched diarylcyclobutanes by photocycloaddition of structurally varied 2'-hydroxychalcones with a range of styrene coupling partners. The utility of this reaction is demonstrated through the direct synthesis of a representative norlignan cyclobutane natural product.
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Affiliation(s)
- Zachary D Miller
- Department of Chemistry, University of Wisconsin-Madison, 1101 University Avenue, Madison, WI, 53726, USA
| | - Byung Joo Lee
- Department of Chemistry, University of Wisconsin-Madison, 1101 University Avenue, Madison, WI, 53726, USA
| | - Tehshik P Yoon
- Department of Chemistry, University of Wisconsin-Madison, 1101 University Avenue, Madison, WI, 53726, USA
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53
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Miller ZD, Lee BJ, Yoon TP. Enantioselective Crossed Photocycloadditions of Styrenic Olefins by Lewis Acid Catalyzed Triplet Sensitization. Angew Chem Int Ed Engl 2017. [DOI: 10.1002/ange.201706975] [Citation(s) in RCA: 41] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Affiliation(s)
- Zachary D. Miller
- Department of Chemistry; University of Wisconsin-Madison; 1101 University Avenue Madison WI 53726 USA
| | - Byung Joo Lee
- Department of Chemistry; University of Wisconsin-Madison; 1101 University Avenue Madison WI 53726 USA
| | - Tehshik P. Yoon
- Department of Chemistry; University of Wisconsin-Madison; 1101 University Avenue Madison WI 53726 USA
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54
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Li W, Lang M, Wang J. Access to Cyclobutadienes via an Organocatalytic Dienamine–Iminium–Allenamine Cascade Approach. Org Lett 2017; 19:4564-4567. [DOI: 10.1021/acs.orglett.7b02161] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Wenjun Li
- School of Pharmaceutical
Sciences, Tsinghua University, Beijing 100084, China
| | - Ming Lang
- School of Pharmaceutical
Sciences, Tsinghua University, Beijing 100084, China
| | - Jian Wang
- School of Pharmaceutical
Sciences, Tsinghua University, Beijing 100084, China
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55
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Castán A, Badorrey R, Gálvez JA, Díaz-de-Villegas MD. Synthesis of new pyrrolidine-based organocatalysts and study of their use in the asymmetric Michael addition of aldehydes to nitroolefins. Beilstein J Org Chem 2017; 13:612-619. [PMID: 28487754 PMCID: PMC5389197 DOI: 10.3762/bjoc.13.59] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/26/2016] [Accepted: 03/09/2017] [Indexed: 11/23/2022] Open
Abstract
New pyrrolidine-based organocatalysts with a bulky substituent at C2 were synthesized from chiral imines derived from (R)-glyceraldehyde acetonide by diastereoselective allylation followed by a sequential hydrozirconation/iodination reaction. The new compounds were found to be effective organocatalysts for the Michael addition of aldehydes to nitroolefins and enantioselectivities up to 85% ee were achieved.
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Affiliation(s)
- Alejandro Castán
- Instituto de Síntesis Química y Catálisis Homogénea (ISQCH), CSIC - Universidad de Zaragoza, Departamento de Química Orgánica, Pedro Cerbuna 12, E-50009 Zaragoza, Spain
| | - Ramón Badorrey
- Instituto de Síntesis Química y Catálisis Homogénea (ISQCH), CSIC - Universidad de Zaragoza, Departamento de Química Orgánica, Pedro Cerbuna 12, E-50009 Zaragoza, Spain
| | - José A Gálvez
- Instituto de Síntesis Química y Catálisis Homogénea (ISQCH), CSIC - Universidad de Zaragoza, Departamento de Química Orgánica, Pedro Cerbuna 12, E-50009 Zaragoza, Spain
| | - María D Díaz-de-Villegas
- Instituto de Síntesis Química y Catálisis Homogénea (ISQCH), CSIC - Universidad de Zaragoza, Departamento de Química Orgánica, Pedro Cerbuna 12, E-50009 Zaragoza, Spain
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56
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Łągiewka B, Albrecht Ł. Studies on the Formation of Dienamine and Trienamine Intermediates by 1
H NMR Spectroscopy. ASIAN J ORG CHEM 2017. [DOI: 10.1002/ajoc.201600616] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Bartosz Łągiewka
- Institute of Organic Chemistry, Department of Chemistry; Lodz University of Technology; Zeromskiego 116 90-924 Łódź Poland
| | - Łukasz Albrecht
- Institute of Organic Chemistry, Department of Chemistry; Lodz University of Technology; Zeromskiego 116 90-924 Łódź Poland
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57
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Diastereoselective Synthesis of Functionalized Angularly-Fused Tetracyclesviaan Organocatalytic Quadruple Reaction Sequence. Adv Synth Catal 2017. [DOI: 10.1002/adsc.201700023] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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58
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Dobi Z, Holczbauer T, Soós T. Schreiner's Thiourea Promoted [2+2] Cycloaddition of Captodative Azetidinones and Nitroolefins. European J Org Chem 2017. [DOI: 10.1002/ejoc.201601524] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Affiliation(s)
- Zoltán Dobi
- Institute of Organic Chemistry; Research Centre for Natural Sciences; Hungarian Academy of Sciences; P. O. Box 286 1519 Budapest Hungary
| | - Tamás Holczbauer
- Institute of Organic Chemistry; Research Centre for Natural Sciences; Hungarian Academy of Sciences; P. O. Box 286 1519 Budapest Hungary
| | - Tibor Soós
- Institute of Organic Chemistry; Research Centre for Natural Sciences; Hungarian Academy of Sciences; P. O. Box 286 1519 Budapest Hungary
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59
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Yu H, Xu P, He H, Zhu J, Lin H, Han S. Highly enantioselective Biginelli reactions using methanopyroline/thiourea – based dual organocatalyst systems: asymmetric synthesis of 4-substituted unsaturated aryl dihydropyrimidines. ACTA ACUST UNITED AC 2017. [DOI: 10.1016/j.tetasy.2016.11.015] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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60
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Switchable regioselectivity in amine-catalysed asymmetric cycloadditions. Nat Chem 2017; 9:590-594. [DOI: 10.1038/nchem.2698] [Citation(s) in RCA: 87] [Impact Index Per Article: 12.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/03/2016] [Accepted: 11/16/2016] [Indexed: 12/15/2022]
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61
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Klier L, Tur F, Poulsen PH, Jørgensen KA. Asymmetric cycloaddition reactions catalysed by diarylprolinol silyl ethers. Chem Soc Rev 2017; 46:1080-1102. [DOI: 10.1039/c6cs00713a] [Citation(s) in RCA: 152] [Impact Index Per Article: 21.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
Organocatalysis as a paint palette for asymmetric cycloaddition reactions.
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Affiliation(s)
- Lydia Klier
- Department of Chemistry
- Aarhus University
- DK-8000 Aarhus C
- Denmark
| | - Fernando Tur
- Department of Chemistry
- Aarhus University
- DK-8000 Aarhus C
- Denmark
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62
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Zheng H, Xu C, Wang Y, Kang T, Liu X, Lin L, Feng X. Catalytic asymmetric [2+2] cycloaddition between quinones and fulvenes and a subsequent stereoselective isomerization to 2,3-dihydrobenzofurans. Chem Commun (Camb) 2017; 53:6585-6588. [DOI: 10.1039/c7cc03211k] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
A chiral Lewis acid catalyzed enantioselective [2+2] cycloaddition between quinones and fulvenes was reported for the first time. The method afforded a series of [6,4,5]-tricyclic cyclobutane derivatives in good yields with excellent regio- and stereoselectivities. Furthermore, the [2+2] adducts could be easily converted into formal [3+2] adducts efficiently and stereoselectively.
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Affiliation(s)
- Haifeng Zheng
- Key Laboratory of Green Chemistry & Technology
- Ministry of Education
- College of Chemistry
- Sichuan University
- Chengdu 610064
| | - Chaoran Xu
- Key Laboratory of Green Chemistry & Technology
- Ministry of Education
- College of Chemistry
- Sichuan University
- Chengdu 610064
| | - Yan Wang
- Key Laboratory of Green Chemistry & Technology
- Ministry of Education
- College of Chemistry
- Sichuan University
- Chengdu 610064
| | - Tengfei Kang
- Key Laboratory of Green Chemistry & Technology
- Ministry of Education
- College of Chemistry
- Sichuan University
- Chengdu 610064
| | - Xiaohua Liu
- Key Laboratory of Green Chemistry & Technology
- Ministry of Education
- College of Chemistry
- Sichuan University
- Chengdu 610064
| | - Lili Lin
- Key Laboratory of Green Chemistry & Technology
- Ministry of Education
- College of Chemistry
- Sichuan University
- Chengdu 610064
| | - Xiaoming Feng
- Key Laboratory of Green Chemistry & Technology
- Ministry of Education
- College of Chemistry
- Sichuan University
- Chengdu 610064
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63
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Marcos V, Alemán J. Old tricks, new dogs: organocatalytic dienamine activation of α,β-unsaturated aldehydes. Chem Soc Rev 2016; 45:6812-6832. [PMID: 27805198 PMCID: PMC5310520 DOI: 10.1039/c6cs00438e] [Citation(s) in RCA: 119] [Impact Index Per Article: 14.9] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/07/2016] [Indexed: 12/23/2022]
Abstract
Chiral secondary amines are some of the most commonly used kinds of catalysts. They have become a reliable tool for the α- and β-activation of carbonyl compounds, via HOMO, SOMO or LUMO activation pathways. Recently, chemists have turned their attention to the development of novel organocatalytic strategies for remote functionalisation, targeting stereocentres even more distant from the catalyst-activation site, through dienamine, trienamine, and vinylogous iminium ion pathways (γ-, ε- and δ-positions, respectively). Here we outline and discuss the state-of-the-art in dienamine activation, classifying examples according to the different reactive activation pathways followed by the formed dienamine intermediate (1,3-, 1,5-, 2,5- and 4,5-functionalisation) and the reaction type developed, as determined by the structure and the nature of electrophiles and nucleophiles.
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Affiliation(s)
- Vanesa Marcos
- School of Chemistry, University of Manchester , Oxford Road , Manchester , M13 9PL , UK .
| | - José Alemán
- Departamento de Química Orgánica (Modulo 1) , Facultad de Ciencias , Universidad Autónoma de Madrid , Cantoblanco , 28049 , Madrid , Spain . ; www.uam.es/jose.aleman
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64
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Huang WY, Anwar S, Chen K. Morita-Baylis-Hillman (MBH) Reaction Derived Nitroallylic Alcohols, Acetates and Amines as Synthons in Organocatalysis and Heterocycle Synthesis. CHEM REC 2016; 17:363-381. [DOI: 10.1002/tcr.201600075] [Citation(s) in RCA: 40] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/14/2016] [Indexed: 02/01/2023]
Affiliation(s)
- Wan-Yun Huang
- Department of Chemistry; National Taiwan Normal University; Taipei Taiwan 116 (ROC)
| | - Shaik Anwar
- Division of Chemistry; Department of Science and Humanities; Vignan's Foundation for Science; Technology and Research University-VFSTRU; (Vignan University) Vadlamudi; Guntur 522 213 Andhra Pradesh India
| | - Kwunmin Chen
- Department of Chemistry; National Taiwan Normal University; Taipei Taiwan 116 (ROC)
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65
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Hu JL, Feng LW, Wang L, Xie Z, Tang Y, Li X. Enantioselective Construction of Cyclobutanes: A New and Concise Approach to the Total Synthesis of (+)-Piperarborenine B. J Am Chem Soc 2016; 138:13151-13154. [PMID: 27604907 DOI: 10.1021/jacs.6b08279] [Citation(s) in RCA: 77] [Impact Index Per Article: 9.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
A highly diastereoselective and enantioselective Cu(II)/SaBOX-catalyzed [2 + 2] cycloaddition of methylidenemalonate and multisubstituted alkenes was developed to furnish optically active cyclobutanes in high yields with >99/1 dr and up to >99% ee. By application of the newly developed method, the total synthesis of (+)-piperarborenine B was completed in eight steps from methylidenemalonate and olefin in 17% overall yield with >99/1 dr and 99% ee.
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Affiliation(s)
- Jiang-Lin Hu
- State Key Laboratory of Organometallic Chemistry and Shanghai-Hong Kong Joint Laboratory in Chemical Synthesis, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences , 345 Lingling Road, Shanghai 200032, China
| | - Liang-Wen Feng
- State Key Laboratory of Organometallic Chemistry and Shanghai-Hong Kong Joint Laboratory in Chemical Synthesis, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences , 345 Lingling Road, Shanghai 200032, China
| | - Lijia Wang
- State Key Laboratory of Organometallic Chemistry and Shanghai-Hong Kong Joint Laboratory in Chemical Synthesis, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences , 345 Lingling Road, Shanghai 200032, China
| | - Zuowei Xie
- Department of Chemistry, The Chinese University of Hong Kong , Shatin, New Territories, Hong Kong, China
| | - Yong Tang
- State Key Laboratory of Organometallic Chemistry and Shanghai-Hong Kong Joint Laboratory in Chemical Synthesis, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences , 345 Lingling Road, Shanghai 200032, China
| | - Xiaoge Li
- State Key Laboratory of Organometallic Chemistry and Shanghai-Hong Kong Joint Laboratory in Chemical Synthesis, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences , 345 Lingling Road, Shanghai 200032, China
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66
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Quintard A, Rodriguez J. Organo- and Iron(0) Catalysis for an Enantioselective Michael Addition-Hemiketalization-Fragmentation Sequence to Protected ω-Hydroxy-nitroketones. Adv Synth Catal 2016. [DOI: 10.1002/adsc.201600618] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Adrien Quintard
- Aix Marseille Univ; CNRS; Centrale Marseille, iSm2 13397 Marseille France
| | - Jean Rodriguez
- Aix Marseille Univ; CNRS; Centrale Marseille, iSm2 13397 Marseille France
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67
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Seegerer A, Hioe J, Hammer MM, Morana F, Fuchs PJW, Gschwind RM. Remote-Stereocontrol in Dienamine Catalysis: Z-Dienamine Preferences and Electrophile-Catalyst Interaction Revealed by NMR and Computational Studies. J Am Chem Soc 2016; 138:9864-73. [PMID: 27430865 DOI: 10.1021/jacs.6b04008] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
Catalysis with remote-stereocontrol provides special challenges in design and comprehension. One famous example is the dienamine catalysis, for which high ee values are reported despite insufficient shielding of the second double bond. Especially for dienamines with variable Z/E-ratios of the second double bond, no correlations to the ee values are found. Therefore, the structures, thermodynamics, and kinetics of dienamine intermediates in SN-type reactions are investigated. The NMR studies show that the preferred dienamine conformation provides an effective shielding if large electrophiles are used. Calculations at SCS-MP2/CBS-level of theory and experimental data of the dienamine formation show kinetic preference for the Z-isomer of the second double bond and a slow isomerization toward the thermodynamically preferred E-isomer. Modulations of the rate-determining step, by variation of the concentration of the electrophile, allow the conversion of dienamines to be observed. With electrophiles, a faster reaction of Z- than of E-isomers is observed experimentally. Calculations corroborate these results by correlating ee values of three catalysts with the kinetics of the electrophilic attack and reveal the significance of CH-π and stacking interactions in the transition states. Thus, for the first time a comprehensive understanding of the remote stereocontrol in γ-functionalization reactions of dienamines and an explanation to the "Z/E-dilemma" are presented. The combination of bulky catalyst subsystems and large electrophiles provides a shielding of one face and causes different reactivities of E/Z-dienamines in nucleophilic attacks from the other face. Kinetic preferences for the formation of Z-dienamines and their unfavorable thermodynamics support high ee values.
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Affiliation(s)
- Andreas Seegerer
- Institut für Organische Chemie, Universität Regensburg , D-93053 Regensburg, Germany
| | - Johnny Hioe
- Institut für Organische Chemie, Universität Regensburg , D-93053 Regensburg, Germany
| | - Michael M Hammer
- Institut für Organische Chemie, Universität Regensburg , D-93053 Regensburg, Germany
| | - Fabio Morana
- Institut für Organische Chemie, Universität Regensburg , D-93053 Regensburg, Germany
| | - Patrick J W Fuchs
- Institut für Organische Chemie, Universität Leipzig , D-04103 Leipzig, Germany
| | - Ruth M Gschwind
- Institut für Organische Chemie, Universität Regensburg , D-93053 Regensburg, Germany
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68
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Wang H, Fang WH, Chen X. Mechanism of the Enantioselective Intramolecular [2 + 2] Photocycloaddition Reaction of Coumarin Catalyzed by a Chiral Lewis Acid: Comparison with Enone Substrates. J Org Chem 2016; 81:7093-101. [DOI: 10.1021/acs.joc.6b00980] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Hongjuan Wang
- Key Laboratory of Theoretical
and Computational Photochemistry of Ministry of Education, Department
of Chemistry, Beijing Normal University, Xin-wai-da-jie 19, Beijing 100875, People’s Republic of China
| | - Wei-Hai Fang
- Key Laboratory of Theoretical
and Computational Photochemistry of Ministry of Education, Department
of Chemistry, Beijing Normal University, Xin-wai-da-jie 19, Beijing 100875, People’s Republic of China
| | - Xuebo Chen
- Key Laboratory of Theoretical
and Computational Photochemistry of Ministry of Education, Department
of Chemistry, Beijing Normal University, Xin-wai-da-jie 19, Beijing 100875, People’s Republic of China
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69
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Hepburn HB, Dell'Amico L, Melchiorre P. Enantioselective Vinylogous Organocascade Reactions. CHEM REC 2016; 16:1787-806. [PMID: 27256039 DOI: 10.1002/tcr.201600030] [Citation(s) in RCA: 83] [Impact Index Per Article: 10.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/17/2016] [Indexed: 12/25/2022]
Abstract
Cascade reactions are powerful tools for rapidly assembling complex molecular architectures from readily available starting materials in a single synthetic operation. Their marriage with asymmetric organocatalysis has led to the development of novel techniques, which are now recognized as reliable strategies for the one-pot enantioselective synthesis of stereochemically dense molecules. In recent years, even more complex synthetic challenges have been addressed by applying the principle of vinylogy to the realm of organocascade catalysis. The key to the success of vinylogous organocascade reactions is the unique ability of the chiral organocatalyst to transfer reactivity to a distal position without losing control on the stereo-determining events. This approach has greatly expanded the synthetic horizons of the field by providing the possibility of forging multiple stereocenters in remote positions from the catalyst's point of action with high selectivity, while simultaneously constructing multiple new bonds. This article critically describes the developments achieved in the field of enantioselective vinylogous organocascade reactions, charting the ideas, the conceptual advances, and the milestone reactions that have been essential for reaching highly practical levels of synthetic efficiency.
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Affiliation(s)
- Hamish B Hepburn
- ICIQ - Institute of Chemical Research of Catalonia Barcelona Institute of Science and Technology, Avenida Països Catalans 16, 43007, Tarragona (Spain)
| | - Luca Dell'Amico
- ICIQ - Institute of Chemical Research of Catalonia Barcelona Institute of Science and Technology, Avenida Països Catalans 16, 43007, Tarragona (Spain)
| | - Paolo Melchiorre
- ICIQ - Institute of Chemical Research of Catalonia Barcelona Institute of Science and Technology, Avenida Països Catalans 16, 43007, Tarragona (Spain).,ICREA - Catalan Institution for Research and Advanced Studies, Passeig Lluís Companys 23, 08010, Barcelona (Spain)
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70
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Guisán-Ceinos M, Parra A, Martín-Heras V, Tortosa M. Enantioselective Synthesis of Cyclobutylboronates via a Copper-Catalyzed Desymmetrization Approach. Angew Chem Int Ed Engl 2016; 55:6969-72. [DOI: 10.1002/anie.201601976] [Citation(s) in RCA: 79] [Impact Index Per Article: 9.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/25/2016] [Indexed: 01/02/2023]
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71
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Organocatalytic, Asymmetric [2+2+2] Annulation to Construct Six-Membered Spirocyclic Oxindoles with Six Continuous Stereogenic Centers. Catalysts 2016. [DOI: 10.3390/catal6050065] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
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72
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Guisán-Ceinos M, Parra A, Martín-Heras V, Tortosa M. Enantioselective Synthesis of Cyclobutylboronates via a Copper-Catalyzed Desymmetrization Approach. Angew Chem Int Ed Engl 2016. [DOI: 10.1002/ange.201601976] [Citation(s) in RCA: 41] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
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73
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Koutoulogenis G, Kaplaneris N, Kokotos CG. (Thio)urea-mediated synthesis of functionalized six-membered rings with multiple chiral centers. Beilstein J Org Chem 2016; 12:462-95. [PMID: 27340441 PMCID: PMC4902000 DOI: 10.3762/bjoc.12.48] [Citation(s) in RCA: 61] [Impact Index Per Article: 7.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/29/2015] [Accepted: 02/23/2016] [Indexed: 12/25/2022] Open
Abstract
Organocatalysis, now running its second decade of life, is being considered one of the main tools a synthetic chemist has to perform asymmetric catalysis. In this review the synthesis of six-membered rings, that contain multiple chiral centers, either by a ring closing process or by a functionalization reaction on an already existing six-membered ring, utilizing bifunctional (thio)ureas will be summarized. Initially, the use of primary amine-thioureas as organocatalysts for the above transformation is being discussed, followed by the examples employing secondary amine-thioureas. Finally, the use of tertiary amine-thioureas and miscellaneous examples are presented.
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Affiliation(s)
- Giorgos Koutoulogenis
- Department of Chemistry, National and Kapodestrian University of Athens, Panepistimiopolis 15771, Athens, Greece
| | - Nikolaos Kaplaneris
- Department of Chemistry, National and Kapodestrian University of Athens, Panepistimiopolis 15771, Athens, Greece
| | - Christoforos G Kokotos
- Department of Chemistry, National and Kapodestrian University of Athens, Panepistimiopolis 15771, Athens, Greece
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74
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Affiliation(s)
- Liang Hong
- School
of Pharmaceutical Sciences, Sun Yat-sen University, Guangzhou, 510006 China
| | - Wangsheng Sun
- Key
Laboratory of Preclinical Study for New Drugs of Gansu Province, Lanzhou University, Lanzhou, 730000 China
| | - Dongxu Yang
- Key
Laboratory of Preclinical Study for New Drugs of Gansu Province, Lanzhou University, Lanzhou, 730000 China
| | - Guofeng Li
- Key
Laboratory of Preclinical Study for New Drugs of Gansu Province, Lanzhou University, Lanzhou, 730000 China
| | - Rui Wang
- School
of Pharmaceutical Sciences, Sun Yat-sen University, Guangzhou, 510006 China
- Key
Laboratory of Preclinical Study for New Drugs of Gansu Province, Lanzhou University, Lanzhou, 730000 China
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75
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Riaño I, Díaz E, Uria U, Reyes E, Carrillo L, Vicario JL. Organocatalytic enantio- and diastereoselective synthesis of 3,5-disubstituted prolines. Chem Commun (Camb) 2016; 52:2330-3. [DOI: 10.1039/c5cc09329e] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The asymmetric synthesis of substituted pyrrolidines has been accomplished using a novel organocatalytic cyclization reaction promoted by aCinchonaalkaloid base primary amine.
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Affiliation(s)
- Iker Riaño
- Department of Organic Chemistry II
- University of the Basque Country (UPV/EHU)
- 48080 Bilbao
- Spain
| | - Estibaliz Díaz
- Department of Organic Chemistry II
- University of the Basque Country (UPV/EHU)
- 48080 Bilbao
- Spain
| | - Uxue Uria
- Department of Organic Chemistry II
- University of the Basque Country (UPV/EHU)
- 48080 Bilbao
- Spain
| | - Efraím Reyes
- Department of Organic Chemistry II
- University of the Basque Country (UPV/EHU)
- 48080 Bilbao
- Spain
| | - Luisa Carrillo
- Department of Organic Chemistry II
- University of the Basque Country (UPV/EHU)
- 48080 Bilbao
- Spain
| | - Jose L. Vicario
- Department of Organic Chemistry II
- University of the Basque Country (UPV/EHU)
- 48080 Bilbao
- Spain
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76
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Mane V, Pandey J, Ayyagari N, Dey C, Kale R, Namboothiri INN. Synthesis of hydrazinoheterocycles from Morita–Baylis–Hillman adducts of nitroalkenes with azodicarboxylates. Org Biomol Chem 2016; 14:2427-38. [DOI: 10.1039/c5ob02656c] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
Abstract
Hydrazinonitroalkenes derived from nitroalkenes and azodicarboxylates are excellent substrates for the synthesis of hitherto unreported hydrazinotriazoles and hydrazinodihydrofurans.
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Affiliation(s)
- Vaijinath Mane
- Department of Chemistry
- Indian Institute of Technology Bombay
- Mumbai 400076
- India
| | - Jyoti Pandey
- Department of Chemistry
- Indian Institute of Technology Bombay
- Mumbai 400076
- India
| | - Narasihmam Ayyagari
- Department of Chemistry
- Indian Institute of Technology Bombay
- Mumbai 400076
- India
| | - Chandan Dey
- Department of Chemistry
- Indian Institute of Technology Bombay
- Mumbai 400076
- India
| | - Raju Kale
- Department of Chemistry
- Indian Institute of Technology Bombay
- Mumbai 400076
- India
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77
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Affiliation(s)
- Jason S. Chen
- Department
of Chemistry, Iowa State University, Ames, Iowa 50011, United States
| | - Gayan A. Abeykoon
- Department
of Chemistry, Iowa State University, Ames, Iowa 50011, United States
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78
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Wang H, Cao X, Chen X, Fang W, Dolg M. Regulatory Mechanism of the Enantioselective Intramolecular Enone [2+2] Photocycloaddition Reaction Mediated by a Chiral Lewis Acid Catalyst Containing Heavy Atoms. Angew Chem Int Ed Engl 2015; 54:14295-8. [PMID: 26437573 DOI: 10.1002/anie.201505931] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/28/2015] [Revised: 08/14/2015] [Indexed: 11/11/2022]
Abstract
The asymmetric catalysis of the intramolecular enone [2+2] photocycloaddition has been subject of extensive experimental studies, however theoretical insight to its regulatory mechanism is still sparse. Accurate quantum chemical calculations at the CASPT2//CASSCF level of theory associated with energy-consistent relativistic pseudopotentials provide a basis for the first regulation theory that the enantioselective reaction is predominantly controlled by the presence of relativistic effects, that is, spin-orbit coupling resulting from heavy atoms in the chiral Lewis acid catalyst.
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Affiliation(s)
- Hongjuan Wang
- Key Laboratory of Theoretical and Computational Photochemistry of Ministry of Education, Department of Chemistry, Beijing Normal University, Xin-wai-da-jie No. 19, Beijing 100875 (China)
| | - Xiaoyan Cao
- Theoretical Chemistry, University of Cologne, Greinstrasse 4, 50939 Cologne (Germany)
| | - Xuebo Chen
- Key Laboratory of Theoretical and Computational Photochemistry of Ministry of Education, Department of Chemistry, Beijing Normal University, Xin-wai-da-jie No. 19, Beijing 100875 (China).
| | - Weihai Fang
- Key Laboratory of Theoretical and Computational Photochemistry of Ministry of Education, Department of Chemistry, Beijing Normal University, Xin-wai-da-jie No. 19, Beijing 100875 (China)
| | - Michael Dolg
- Theoretical Chemistry, University of Cologne, Greinstrasse 4, 50939 Cologne (Germany).
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79
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Wang H, Cao X, Chen X, Fang W, Dolg M. Regulatory Mechanism of the Enantioselective Intramolecular Enone [2+2] Photocycloaddition Reaction Mediated by a Chiral Lewis Acid Catalyst Containing Heavy Atoms. Angew Chem Int Ed Engl 2015. [DOI: 10.1002/ange.201505931] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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80
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Liu K, Jiang X. Regioselective and Enantioselective Domino Aldol-Oxa-Michael Reactions to Construct Quaternary (Chroman) Stereocenters. European J Org Chem 2015. [DOI: 10.1002/ejoc.201501065] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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81
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Xu Y, Conner ML, Brown MK. Cyclobutane and cyclobutene synthesis: catalytic enantioselective [2+2] cycloadditions. Angew Chem Int Ed Engl 2015; 54:11918-28. [PMID: 26333192 DOI: 10.1002/anie.201502815] [Citation(s) in RCA: 212] [Impact Index Per Article: 23.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/26/2015] [Indexed: 12/21/2022]
Abstract
Cyclobutanes and cyclobutenes are important structural motifs found in numerous biologically significant molecules, and they are useful intermediates for chemical synthesis. Consequently, [2+2] cycloadditions to access cyclobutanes and cyclobutenes have been established to be particularly useful transformations. Within the last 10 years, an increase in the frequency of publications for catalytic enantioselective [2+2] cycloadditions has occurred. These reactions provide access to a wide array of enantiomerically enriched chemical diversity that was not previously attainable. Described in this review are the advances made in catalytic enantioselective [2+2] cycloadditions to access cyclobutanes and cyclobutenes.
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Affiliation(s)
- Yao Xu
- Department of Chemistry, Indiana University, 800 E. Kirkwood Ave., Bloomington, IN 47405 (USA)
| | - Michael L Conner
- Department of Chemistry, Indiana University, 800 E. Kirkwood Ave., Bloomington, IN 47405 (USA)
| | - M Kevin Brown
- Department of Chemistry, Indiana University, 800 E. Kirkwood Ave., Bloomington, IN 47405 (USA).
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82
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Xu Y, Conner ML, Brown MK. Synthese von Cyclobutanen und Cyclobutenen: katalytische enantioselektive [2+2]-Cycloadditionen. Angew Chem Int Ed Engl 2015. [DOI: 10.1002/ange.201502815] [Citation(s) in RCA: 63] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
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83
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Umemiya S, Hayashi Y. Asymmetric Formal [3+2] Cycloaddition Reaction of Succinaldehyde and Nitroalkene Catalyzed by Diphenylprolinol Silyl Ether. European J Org Chem 2015. [DOI: 10.1002/ejoc.201500623] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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84
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Chen S, Lou Q, Ding Y, Zhang S, Hu W, Zhao J. Organocatalytic Enantioselective Michael Reaction of Malononitrile with β,β-Disubstituted Nitroalkenes. Adv Synth Catal 2015. [DOI: 10.1002/adsc.201500079] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
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85
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Conner ML, Xu Y, Brown MK. Catalytic enantioselective allenoate-alkene [2 + 2] cycloadditions. J Am Chem Soc 2015; 137:3482-5. [PMID: 25756948 DOI: 10.1021/jacs.5b00563] [Citation(s) in RCA: 67] [Impact Index Per Article: 7.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Catalytic enantioselective [2 + 2] cycloadditions between allenoates and alkenes is disclosed. The method functions well for a variety of alkenes, and the products are generated with excellent levels of enantioselectivity. One of the most significant aspects of the present method is that unactivated alkenes are suitable substrates for this method, which is distinctly different from nearly all other catalytic enantioselective [2 + 2] cycloaddition methods.
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Affiliation(s)
- Michael L Conner
- Department of Chemistry, Indiana University, 800 E. Kirkwood Avenue, Bloomington, Indiana 47405, United States
| | - Yao Xu
- Department of Chemistry, Indiana University, 800 E. Kirkwood Avenue, Bloomington, Indiana 47405, United States
| | - M Kevin Brown
- Department of Chemistry, Indiana University, 800 E. Kirkwood Avenue, Bloomington, Indiana 47405, United States
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86
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Halskov KS, Kniep F, Lauridsen VH, Iversen EH, Donslund BS, Jørgensen KA. Organocatalytic enamine-activation of cyclopropanes for highly stereoselective formation of cyclobutanes. J Am Chem Soc 2015; 137:1685-91. [PMID: 25575040 DOI: 10.1021/ja512573q] [Citation(s) in RCA: 90] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Abstract
A novel organocatalytic activation mode of cyclopropanes is presented. The reaction concept is based on a design in which a reactive donor-acceptor cyclopropane intermediate is generated by in situ condensation of cyclopropylacetaldehydes with an aminocatalyst. The mechanism of this enamine-based activation of cyclopropylacetaldehydes is investigated by the application of a combined computational and experimental approach. The activation can be traced to a favorable orbital interaction between the π-orbital of the enamine and the σ*C-C orbital of the cyclopropyl ring. Furthermore, the synthetic potential of the developed system has been evaluated. By the application of a chiral secondary amine catalyst, the organocatalytically activated cyclopropanes show an unexpected and highly stereoselective formation of cyclobutanes, functionalizing at the usually inert sites of the donor-acceptor cyclopropane. By the application of 3-olefinic oxindoles and benzofuranone, biologically relevant spirocyclobutaneoxindoles and spirocyclobutanebenzofuranone can be obtained in good yields, high diastereomeric ratios, and excellent enantiomeric excesses. The mechanism of the reaction is discussed and two mechanistic proposals are presented.
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Affiliation(s)
- Kim Søholm Halskov
- Center for Catalysis, Department of Chemistry, Aarhus University , DK-8000 Aarhus C, Denmark
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87
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Riaño I, Uria U, Carrillo L, Reyes E, Vicario JL. 4-Alkenyl-5H-1,2,3-oxathiazole 2,2-dioxides in catalytic and enantioselective [4 + 2] cycloaddition through iminium activation. Straightforward access to the trans-decaline framework and to densely functionalized cyclohexanes. Org Chem Front 2015. [DOI: 10.1039/c4qo00316k] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
4-Alkenyl-5H-1,2,3-oxathiazole 2,2-dioxides undergo Michael/Michael cascade reaction with enals through iminium/enamine activation.
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Affiliation(s)
- Iker Riaño
- Department of Organic Chemistry II
- 48080 Bilbao
- Spain
| | - Uxue Uria
- Department of Organic Chemistry II
- 48080 Bilbao
- Spain
| | | | - Efraim Reyes
- Department of Organic Chemistry II
- 48080 Bilbao
- Spain
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88
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Chen YJ, Hu TJ, Feng CG, Lin GQ. Synthesis of chiral cyclobutanes via rhodium/diene-catalyzed asymmetric 1,4-addition: a dramatic ligand effect on the diastereoselectivity. Chem Commun (Camb) 2015; 51:8773-6. [DOI: 10.1039/c5cc02023a] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A highly diastereo- and enantioselective rhodium-catalyzed arylation of cyclobutene-1-carboxylate esters for the efficient synthesis of chiral cyclobutanes has been developed.
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Affiliation(s)
- Ya-Jing Chen
- CAS Key Laboratory of Synthetic Chemistry of Natural Substances
- Shanghai Institute of Organic Chemistry
- Chinese Academy of Sciences
- Shanghai 200032
- P. R. China
| | - Tian-Jiao Hu
- CAS Key Laboratory of Synthetic Chemistry of Natural Substances
- Shanghai Institute of Organic Chemistry
- Chinese Academy of Sciences
- Shanghai 200032
- P. R. China
| | - Chen-Guo Feng
- CAS Key Laboratory of Synthetic Chemistry of Natural Substances
- Shanghai Institute of Organic Chemistry
- Chinese Academy of Sciences
- Shanghai 200032
- P. R. China
| | - Guo-Qiang Lin
- CAS Key Laboratory of Synthetic Chemistry of Natural Substances
- Shanghai Institute of Organic Chemistry
- Chinese Academy of Sciences
- Shanghai 200032
- P. R. China
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89
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Gopi E, Kumar T, Menna-Barreto RFS, Valença WO, da Silva Júnior EN, Namboothiri INN. Imidazoles from nitroallylic acetates and α-bromonitroalkenes with amidines: synthesis and trypanocidal activity studies. Org Biomol Chem 2015; 13:9862-71. [DOI: 10.1039/c5ob01444a] [Citation(s) in RCA: 37] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Abstract
One-pot cascade reactions of amidines with nitroallylic acetates and α-bromonitroalkenes provide functionalized imidazoles that exhibit trypanocidal activity.
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Affiliation(s)
- Elumalai Gopi
- Department of Chemistry
- Indian Institute of Technology Bombay
- Mumbai 400 076
- India
| | - Tarun Kumar
- Department of Chemistry
- Indian Institute of Technology Bombay
- Mumbai 400 076
- India
| | | | - Wagner O. Valença
- Institute of Exact Sciences
- Department of Chemistry
- Federal University of Minas Gerais
- Belo Horizonte
- Brazil
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90
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Kumar I, Ramaraju P, Mir NA, Singh A. Linear dialdehydes as promising substrates for aminocatalyzed transformations. Org Biomol Chem 2015; 13:1280-93. [DOI: 10.1039/c4ob01805b] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Linear dialdehydes: This article summarizes the recent utilization of linear dialdehydes as appropriate substrates for amine catalyzed cascade/domino transformations.
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Affiliation(s)
- Indresh Kumar
- Department of Chemistry
- Birla Institute of Technology and Science-Pilani
- India
| | - Panduga Ramaraju
- Department of Chemistry
- Birla Institute of Technology and Science-Pilani
- India
| | - Nisar A. Mir
- Department of Chemistry
- Birla Institute of Technology and Science-Pilani
- India
| | - Anoop Singh
- Department of Chemistry
- Birla Institute of Technology and Science-Pilani
- India
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91
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Subba Reddy BV, Muralikrishna K, Yadav JS, Babu NJ, Sirisha K, Sarma AVS. Tandem Prins/Wagner/Ritter process for the stereoselective synthesis of (3-oxabicyclo[4.2.0]octanyl)amide and (1-(5-aryltetrahydrofuran-3-yl)cyclobutyl)amide derivatives. Org Biomol Chem 2015; 13:5532-6. [DOI: 10.1039/c5ob00031a] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A novel synthesis of 4-aryl-(3-oxabicyclo[4.2.0]octan-1-yl)amide and (1-(5-aryltetrahydrofuran-3-yl)cyclobutyl)amide derivatives was achieved through a sequential Prins/Wagner/Ritter process.
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Affiliation(s)
- B. V. Subba Reddy
- Natural Product Chemistry
- CSIR-Indian Institute of Chemical Technology
- Hyderabad-500 007
- India
| | - K. Muralikrishna
- Natural Product Chemistry
- CSIR-Indian Institute of Chemical Technology
- Hyderabad-500 007
- India
| | - J. S. Yadav
- Natural Product Chemistry
- CSIR-Indian Institute of Chemical Technology
- Hyderabad-500 007
- India
| | - N. Jagdeesh Babu
- Laboratory of Crystallography
- CSIR-Indian Institute of Chemical Technology
- Hyderabad-500 007
- India
| | - K. Sirisha
- Centre for NMR and Structural Chemistry
- CSIR-Indian Institute of Chemical Technology
- Hyderabad-500 007
- India
| | - A. V. S. Sarma
- Centre for NMR and Structural Chemistry
- CSIR-Indian Institute of Chemical Technology
- Hyderabad-500 007
- India
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92
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Mane V, Kumar T, Pradhan S, Katiyar S, Namboothiri INN. One-pot regioselective synthesis of functionalized and fused furans from Morita–Baylis–Hillman and Rauhut–Currier adducts of nitroalkenes. RSC Adv 2015. [DOI: 10.1039/c5ra11471c] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023] Open
Abstract
Functionalized and fused furans were synthesized by a one-pot regioselective cascade reaction from Morita–Baylis–Hillman acetates and Rauhut–Currier adducts of nitroalkenes.
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Affiliation(s)
- Vaijinath Mane
- Department of Chemistry
- Indian Institute of Technology Bombay
- Mumbai 400076
- India
| | - Tarun Kumar
- Department of Chemistry
- Indian Institute of Technology Bombay
- Mumbai 400076
- India
| | - Sourav Pradhan
- Department of Chemistry
- Indian Institute of Technology Bombay
- Mumbai 400076
- India
| | - Savita Katiyar
- Department of Chemistry
- Indian Institute of Technology Bombay
- Mumbai 400076
- India
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93
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Shashank AB, Ramachary DB. Organocatalytic diastereoselective synthesis of chiral decalines through the domino Claisen–Schmidt/Henry reaction. Org Biomol Chem 2015; 13:5110-4. [DOI: 10.1039/c5ob00562k] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
General and operative domino Claisen–Schmidt/Henry (CS/H) reaction has been revealed to obtain highly substituted chiral decalines in good yields with excellent ees and des by using push–pull enamine catalysis.
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Affiliation(s)
- Adluri B. Shashank
- Catalysis Laboratory
- School of Chemistry
- University of Hyderabad
- Hyderabad-500 046
- India
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94
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Abstract
This review focuses on enantioselective cooperative catalytic reactions, wherein two catalysts work simultaneously to form products which cannot be obtained by the use of a single catalyst alone, which have attracted considerable attention in recent years.
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Affiliation(s)
- Suleman M. Inamdar
- Division of Organic Chemistry
- CSIR-National Chemical Laboratory
- Pune 411 008
- India
| | - Valmik S. Shinde
- Division of Organic Chemistry
- CSIR-National Chemical Laboratory
- Pune 411 008
- India
| | - Nitin T. Patil
- Division of Organic Chemistry
- CSIR-National Chemical Laboratory
- Pune 411 008
- India
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95
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Qi LW, Yang Y, Gui YY, Zhang Y, Chen F, Tian F, Peng L, Wang LX. Asymmetric synthesis of 3,3'-spirooxindoles fused with cyclobutanes through organocatalytic formal [2 + 2] cycloadditions under H-bond-directing dienamine activation. Org Lett 2014; 16:6436-9. [PMID: 25494171 DOI: 10.1021/ol503266q] [Citation(s) in RCA: 66] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
The first organocatalytic asymmetric synthesis of a spirooxindole skeleton incorporated with a cyclobutane moiety has been successfully developed on the basis of H-bond-directing dienamine activation. Structurally complex spirocyclobutyl oxindoles, which possess four contiguous stereocenters, including one spiro quaternary center, were obtained in good yields (up to 83%) with excellent β,γ-regioselectivity (>19:1) and stereocontrol (up to >19:1 dr and 97% ee).
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Affiliation(s)
- Liang-Wen Qi
- Key Laboratory of Asymmetric Synthesis and Chirotechnology of Sichuan Province, Chengdu Institute of Organic Chemistry, Chinese Academy of Sciences , Chengdu 610041, China
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96
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Izquierdo C, Esteban F, Parra A, Alfaro R, Alemán J, Fraile A, Ruano JLG. Control of the dual reactivity (iminium-dienamine) of β-arylmethyl α,β-unsaturated aldehydes in organocatalytic 1,3-dipolar cycloadditions with N-benzoyl C,N-cyclic azomethine imines. J Org Chem 2014; 79:10417-33. [PMID: 25296264 DOI: 10.1021/jo5018519] [Citation(s) in RCA: 42] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
1,3-Dipolar cycloadditions of C,N-cyclic azomethine imines with α,β-unsaturated aldehydes can be performed with complete control of the regio-, exo-, and enantioselectivity under aminocatalytic conditions. The so far never studied competence of the iminium-dienamine reactivity inherent to β-alkyl α,β-unsaturated aldehydes was studied, which was possible by allowing achievement of complete control of the chemoselectivity in reactions of the β-arylmethyl derivatives with azomethine imines by using different additives and organocatalysts, whose role has been rationalized by DFT calculations and chemical proofs. Thus, it has been possible to selectively obtain the pyrazolidines resulting from both the attack to the C2-C3 (via iminium) and the C3-C4 (via dienamine) bonds at the starting enals, which can be used as precursors of interesting tetrahydroisoquinolinic compounds.
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Affiliation(s)
- Cristina Izquierdo
- Departamento de Química Orgánica (Módulo 1), Facultad de Ciencias, Universidad Autónoma de Madrid , 28049 Madrid, Spain
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97
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Kim KH, Lim JW, Lee J, Go MJ, Kim JN. Thermal Intramolecular [2+2] Cycloaddition: Synthesis of 3-Azabicyclo[3.1.1]heptanes from Morita-Baylis-Hillman Adduct-Derived 4,4-Diaryl-1,3-dienes. Adv Synth Catal 2014. [DOI: 10.1002/adsc.201400571] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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98
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Martínez JI, Villar L, Uria U, Carrillo L, Reyes E, Vicario JL. Bifunctional Squaramide Catalysts with the Same Absolute Chirality for the Diastereodivergent Access to Densely Functionalised Cyclohexanes through Enantioselective Domino Reactions. Synthesis and Mechanistic Studies. Adv Synth Catal 2014. [DOI: 10.1002/adsc.201400502] [Citation(s) in RCA: 46] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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99
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Johnson T, Choo KL, Lautens M. Rhodium-Catalyzed Arylative Cyclization for the Enantioselective Synthesis of (Trifluoromethyl)cyclobutanols. Chemistry 2014; 20:14194-7. [DOI: 10.1002/chem.201404896] [Citation(s) in RCA: 46] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/18/2014] [Indexed: 11/09/2022]
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100
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Hernvann F, Rasore G, Declerck V, Aitken DJ. Stereoselective intermolecular [2 + 2]-photocycloaddition reactions of maleic anhydride: stereocontrolled and regiocontrolled access to 1,2,3-trifunctionalized cyclobutanes. Org Biomol Chem 2014; 12:8212-22. [DOI: 10.1039/c4ob01383b] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
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