51
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Xu J, Hu S, Lu Y, Dong Y, Tang W, Lu T, Du D. N-Heterocyclic Carbene-Catalyzed Umpolung Formal [3+3] Cycloaddition of Enals with Isatogens: Access to Fused Indolin-3-ones with a Tetrasubstituted Carbon Stereocenter. Adv Synth Catal 2015. [DOI: 10.1002/adsc.201401070] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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52
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Xu J, Chen X, Wang M, Zheng P, Song BA, Chi YR. Aminomethylation of Enals through Carbene and Acid Cooperative Catalysis: Concise Access to β2-Amino Acids. Angew Chem Int Ed Engl 2015; 54:5161-5. [DOI: 10.1002/anie.201412132] [Citation(s) in RCA: 91] [Impact Index Per Article: 10.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/18/2014] [Revised: 02/09/2015] [Indexed: 11/09/2022]
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53
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Xu J, Chen X, Wang M, Zheng P, Song BA, Chi YR. Aminomethylation of Enals through Carbene and Acid Cooperative Catalysis: Concise Access to β2-Amino Acids. Angew Chem Int Ed Engl 2015. [DOI: 10.1002/ange.201412132] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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54
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Huang YY, Yang X, Chen Z, Verpoort F, Shibata N. Catalytic Asymmetric Synthesis of Enantioenriched Heterocycles Bearing a CCF3Stereogenic Center. Chemistry 2015; 21:8664-84. [DOI: 10.1002/chem.201500361] [Citation(s) in RCA: 103] [Impact Index Per Article: 11.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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55
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Xie Y, Yu C, Li T, Tu S, Yao C. An NHC-catalyzed in situ activation strategy to β-functionalize saturated carboxylic acid: an enantioselective formal [3+2] annulation for spirocyclic oxindolo-γ-butyrolactones. Chemistry 2015; 21:5355-9. [PMID: 25689040 DOI: 10.1002/chem.201500345] [Citation(s) in RCA: 51] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/27/2015] [Indexed: 01/07/2023]
Abstract
An in situ NHC-catalyzed activation strategy to β-functionalize saturated carboxylic acid was developed. This asymmetric formal [3+2] annulation could deliver spirocyclic oxindolo-γ-butyrolactones from saturated carboxylic acid and isatin in good yields with high to excellent enantioselectivities. The easy availability of the starting materials, direct installation of functional units at unreactive carbon atom and the convergent assembly make this protocol attractive in the field of organic synthesis.
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Affiliation(s)
- Yuanwei Xie
- School of Chemistry and Chemical Engineering, Jiangsu Key Lab of Green Synthetic Chemistry for Functional Materials, Jiangsu Normal University, Xuzhou, Jiangsu 221116 (P.R. China)
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56
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Zhou P, Cai Y, Lin L, Lian X, Xia Y, Liu X, Feng X. Asymmetric Synthesis of Spirocyclic Oxindole-Fused Tetrahydrothiophenesvia N,N′-Dioxide-Nickel(II) Catalyzed Domino Reaction of 1,4-Dithiane-2,5-diol with 3-Alkenyloxindoles. Adv Synth Catal 2015. [DOI: 10.1002/adsc.201400964] [Citation(s) in RCA: 41] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
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57
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Suman K, Thennarasu S. Base catalysed domino and self-domino Michael–Aldol reactions: one-pot synthesis of dispirocyclopentaneoxindoles containing multiple chiral stereocenters. RSC Adv 2015. [DOI: 10.1039/c5ra00283d] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
A method for construction of three classes of densely functionalized dispirocyclopentaneoxindoles with multiple chiral stereocenters is developed using base promoted self-domino and domino reactions with/without the presence of nucleophilic solvents.
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Affiliation(s)
- Koorathota Suman
- Organic Chemistry Laboratory
- CSIR-Central Leather Research Institute
- Chennai-600020
- India
| | - Sathiah Thennarasu
- Organic Chemistry Laboratory
- CSIR-Central Leather Research Institute
- Chennai-600020
- India
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58
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Wang Y, Zheng L, Wei D, Tang M. A quantum mechanical study of the mechanism and stereoselectivity of the N-heterocyclic carbene catalyzed [4 + 2] annulation reaction of enals with azodicarboxylates. Org Chem Front 2015. [DOI: 10.1039/c5qo00121h] [Citation(s) in RCA: 46] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The mechanism and stereoselectivity of the NHC-catalyzed [4 + 2] annulation reaction of enals with azodicarboxylates have been investigated using the DFT method.
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Affiliation(s)
- Yang Wang
- The College of Chemistry and Molecular Engineering
- Center of Computational Chemistry
- Zhengzhou University
- Zhengzhou
- P.R. China
| | - Linjie Zheng
- The College of Chemistry and Molecular Engineering
- Center of Computational Chemistry
- Zhengzhou University
- Zhengzhou
- P.R. China
| | - Donghui Wei
- The College of Chemistry and Molecular Engineering
- Center of Computational Chemistry
- Zhengzhou University
- Zhengzhou
- P.R. China
| | - Mingsheng Tang
- The College of Chemistry and Molecular Engineering
- Center of Computational Chemistry
- Zhengzhou University
- Zhengzhou
- P.R. China
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59
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Wu Z, Li F, Wang J. Intermolecular Dynamic Kinetic Resolution Cooperatively Catalyzed by an N-Heterocyclic Carbene and a Lewis Acid. Angew Chem Int Ed Engl 2014. [DOI: 10.1002/ange.201410030] [Citation(s) in RCA: 35] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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60
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Wu Z, Li F, Wang J. Intermolecular Dynamic Kinetic Resolution Cooperatively Catalyzed by an N-Heterocyclic Carbene and a Lewis Acid. Angew Chem Int Ed Engl 2014; 54:1629-33. [DOI: 10.1002/anie.201410030] [Citation(s) in RCA: 101] [Impact Index Per Article: 10.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/13/2014] [Indexed: 11/09/2022]
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61
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Jin Z, Chen S, Wang Y, Zheng P, Yang S, Chi YR. β-Functionalization of Carboxylic Anhydrides with β-Alkyl Substituents through Carbene Organocatalysis. Angew Chem Int Ed Engl 2014; 53:13506-9. [DOI: 10.1002/anie.201408604] [Citation(s) in RCA: 71] [Impact Index Per Article: 7.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/27/2014] [Indexed: 11/05/2022]
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62
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Jin Z, Chen S, Wang Y, Zheng P, Yang S, Chi YR. β-Functionalization of Carboxylic Anhydrides with β-Alkyl Substituents through Carbene Organocatalysis. Angew Chem Int Ed Engl 2014. [DOI: 10.1002/ange.201408604] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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63
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Li JL, Sahoo B, Daniliuc CG, Glorius F. Konjugierte Umpolung von β,β-disubstituierten Enalen durch duale Katalyse mit N-heterocyclischen Carbenen und Brønsted-Säuren: einfacher Aufbau benachbarter, quartärer Stereozentren. Angew Chem Int Ed Engl 2014. [DOI: 10.1002/ange.201405178] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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64
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Li JL, Sahoo B, Daniliuc CG, Glorius F. Conjugate Umpolung of β,β-Disubstituted Enals by Dual Catalysis with an N-Heterocyclic Carbene and a Brønsted Acid: Facile Construction of Contiguous Quaternary Stereocenters. Angew Chem Int Ed Engl 2014; 53:10515-9. [DOI: 10.1002/anie.201405178] [Citation(s) in RCA: 117] [Impact Index Per Article: 11.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/11/2014] [Indexed: 11/09/2022]
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65
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Guo C, Schedler M, Daniliuc CG, Glorius F. N-Heterocyclic Carbene Catalyzed Formal [3+2] Annulation Reaction of Enals: An Efficient Enantioselective Access to Spiro-Heterocycles. Angew Chem Int Ed Engl 2014; 53:10232-6. [DOI: 10.1002/anie.201405381] [Citation(s) in RCA: 158] [Impact Index Per Article: 15.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/18/2014] [Indexed: 11/12/2022]
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66
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Guo C, Schedler M, Daniliuc CG, Glorius F. Durch N-heterocyclische Carbene katalysierte formale [3+2]-Anellierungen von Enalen: enantioselektiver Zugang zu Spiroheterocyclen. Angew Chem Int Ed Engl 2014. [DOI: 10.1002/ange.201405381] [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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67
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Lee A, Scheidt KA. A cooperative N-heterocyclic carbene/chiral phosphate catalysis system for allenolate annulations. Angew Chem Int Ed Engl 2014; 53:7594-8. [PMID: 24895280 PMCID: PMC4142640 DOI: 10.1002/anie.201403446] [Citation(s) in RCA: 65] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/18/2014] [Revised: 04/08/2014] [Indexed: 11/09/2022]
Abstract
The highly enantioselective NHC-catalyzed [3+2] annulation reaction with α,β-alkynals and α-ketoesters has been developed. A new mode of cooperative catalysis involving the combination of a chiral Brønsted acid and a C1-symmetric biaryl saturated-imidazolium precatalyst was required to generate the desired γ-crotonolactones in high yields and levels of enantioselectivity.
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Affiliation(s)
- Anna Lee
- Department of Chemistry Center for Molecular Innovation and Drug Discovery Northwestern University 2145 Sheridan Road, Evanston, IL 60208 (USA)
| | - Karl A. Scheidt
- Department of Chemistry Center for Molecular Innovation and Drug Discovery Northwestern University 2145 Sheridan Road, Evanston, IL 60208 (USA)
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68
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Bera S, Samanta RC, Daniliuc CG, Studer A. Asymmetric Synthesis of Highly Substituted β-Lactones through Oxidative Carbene Catalysis with LiCl as Cooperative Lewis Acid. Angew Chem Int Ed Engl 2014; 53:9622-6. [DOI: 10.1002/anie.201405200] [Citation(s) in RCA: 137] [Impact Index Per Article: 13.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/12/2014] [Indexed: 11/06/2022]
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69
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Bera S, Samanta RC, Daniliuc CG, Studer A. Asymmetric Synthesis of Highly Substituted β-Lactones through Oxidative Carbene Catalysis with LiCl as Cooperative Lewis Acid. Angew Chem Int Ed Engl 2014. [DOI: 10.1002/ange.201405200] [Citation(s) in RCA: 44] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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70
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Suman K, Srinu L, Thennarasu S. Lewis Acid Catalyzed Unprecedented [3 + 2] Cycloaddition Yields 3,3′-Pyrrolidinyldispirooxindoles Containing Four Contiguous Chiral Stereocenters with Two Contiguous Quaternary Spirostereocenters. Org Lett 2014; 16:3732-5. [DOI: 10.1021/ol501547p] [Citation(s) in RCA: 52] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Affiliation(s)
- Koorathota Suman
- Organic Chemistry Laboratory, CSIR-Central Leather Research Institute Adyar, Chennai 600020, India
| | - Lanka Srinu
- Organic Chemistry Laboratory, CSIR-Central Leather Research Institute Adyar, Chennai 600020, India
| | - Sathiah Thennarasu
- Organic Chemistry Laboratory, CSIR-Central Leather Research Institute Adyar, Chennai 600020, India
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71
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Lee A, Scheidt KA. A Cooperative N-Heterocyclic Carbene/Chiral Phosphate Catalysis System for Allenolate Annulations. Angew Chem Int Ed Engl 2014. [DOI: 10.1002/ange.201403446] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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72
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Xu Q, Wang D, Wei Y, Shi M. Highly Efficient and Stereoselective Construction of Bispirooxindole Derivatives via a Three-Component 1,3-Dipolar Cycloaddition Reaction. ChemistryOpen 2014; 3:93-8. [PMID: 25050227 PMCID: PMC4101724 DOI: 10.1002/open.201402003] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/13/2014] [Indexed: 11/11/2022] Open
Abstract
A highly regio- and stereoselective synthesis of bispirooxindoles by 1,3-dipolar cycloaddition of in situ generated azomethine ylides from isatin and proline to different electron-deficient alkenes has been developed. The synthesis affords the desired bispiro scaffold compounds in excellent yields with high regioselectivity under mild conditions. The stereochemistry was determined by single-crystal X-ray analysis.
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Affiliation(s)
- Qin Xu
- Key Laboratory for Advanced Materials and Institute of Fine Chemicals School of Chemistry & Molecular Engineering East China University of Science and Technology 130 Mei Long Road, Shanghai 200237 (P. R. China)
| | - De Wang
- Key Laboratory for Advanced Materials and Institute of Fine Chemicals School of Chemistry & Molecular Engineering East China University of Science and Technology 130 Mei Long Road, Shanghai 200237 (P. R. China)
| | - Yin Wei
- State Key Laboratory of Organometallic Chemistry Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences 345 Lingling Road, Shanghai 200032 (P. R. China) E-mail:
| | - Min Shi
- Key Laboratory for Advanced Materials and Institute of Fine Chemicals School of Chemistry & Molecular Engineering East China University of Science and Technology 130 Mei Long Road, Shanghai 200237 (P. R. China) ; State Key Laboratory of Organometallic Chemistry Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences 345 Lingling Road, Shanghai 200032 (P. R. China) E-mail:
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73
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Zhang XN, Dong X, Wei Y, Shi M. Access to 2′,3′-dihydro-1′H-spiro[indoline-3,4′-pyridin]-2-ones via amino acid derived phosphine-catalyzed asymmetric [4+2] annulation with easily available oxindole-derived α,β-unsaturated imines. Tetrahedron 2014. [DOI: 10.1016/j.tet.2014.02.052] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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74
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Zhang D, Johnson S, Cui HL, Tanaka F. Synthesis of Furanose Spirooxindoles via 1,8-Diazabicyclo[5.4.0]undec-7-ene (DBU)-Catalyzed Aldol Reactions of a Pyruvic Aldehyde Derivative. ASIAN J ORG CHEM 2014. [DOI: 10.1002/ajoc.201400016] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
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75
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Zhang HM, Jia WQ, Liang ZQ, Ye S. N-Heterocyclic Carbene-Catalyzed [3+3] Cyclocondensation of Bromoenals and Ketimines: Highly Enantioselective Synthesis of Dihydropyridinones. ASIAN J ORG CHEM 2014. [DOI: 10.1002/ajoc.201400010] [Citation(s) in RCA: 35] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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76
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Tan F, Lu LQ, Yang QQ, Guo W, Bian Q, Chen JR, Xiao WJ. Enantioselective Cascade Michael Addition/Cyclization Reactions of 3-Nitro-2H-Chromenes with 3-Isothiocyanato Oxindoles: Efficient Synthesis of Functionalized Polycyclic Spirooxindoles. Chemistry 2014; 20:3415-20. [DOI: 10.1002/chem.201303583] [Citation(s) in RCA: 86] [Impact Index Per Article: 8.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/10/2013] [Indexed: 12/22/2022]
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77
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Jayakumar S, Muthusamy S, Prakash M, Kesavan V. Enantioselective Synthesis of Spirooxindole α-exo-Methylene-γ-butyrolactones from 3-OBoc-Oxindoles. European J Org Chem 2014. [DOI: 10.1002/ejoc.201301684] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
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78
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Abbaraju S, Zhao JCG. Asymmetric Aldol Reaction of 3-Acetyl-2 H-chromen-2-ones and Isatins Catalyzed by a Bifunctional Quinidine Urea Catalyst. Adv Synth Catal 2014; 356:237-241. [PMID: 24839435 DOI: 10.1002/adsc.201300623] [Citation(s) in RCA: 34] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Abstract
The asymmetric aldol reaction of 3-acetyl-2H-chromen-2-ones and isatins has been realized by using a bifunctional quinidine-derived urea as the catalyst. The corresponding 3-hydroxyoxindole derivatives containing a 2H-chromen-2-one moiety were obtained in good yields and high enantioselectivities. When (Z)-ethyl 2-benzylideneacetoacetate was used as the substrate, a mixture of two diastereomers (both Z and E) was obtained due to the isomerization of the double bond under the reaction conditions.
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Affiliation(s)
- Santhi Abbaraju
- Department of Chemistry, University of Texas at San Antonio, One UTSA Circle, San Antonio, Texas 78249-0698.
| | - John Cong-Gui Zhao
- Department of Chemistry, University of Texas at San Antonio, One UTSA Circle, San Antonio, Texas 78249-0698.
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79
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Nawaz F, Zaghouani M, Bonne D, Chuzel O, Rodriguez J, Coquerel Y. Design, Synthesis, and Organocatalytic Activity of N-Heterocyclic Carbenes Functionalized with Hydrogen-Bond Donors in Enantioselective Reactions of Homoenolates. European J Org Chem 2013. [DOI: 10.1002/ejoc.201301366] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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80
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Lombardo VM, Thomas CD, Scheidt KA. A Tandem Isomerization/Prins Strategy: Iridium(III)/Brønsted Acid Cooperative Catalysis. Angew Chem Int Ed Engl 2013. [DOI: 10.1002/ange.201306462] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
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81
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Lombardo VM, Thomas CD, Scheidt KA. A tandem isomerization/prins strategy: iridium(III)/Brønsted acid cooperative catalysis. Angew Chem Int Ed Engl 2013; 52:12910-4. [PMID: 24218144 DOI: 10.1002/anie.201306462] [Citation(s) in RCA: 62] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/24/2013] [Indexed: 02/03/2023]
Abstract
Working together: A mild and efficient isomerization/protonation sequence generates pyran-fused indoles by cooperative catalysis between cationic iridium(III) and Bi(OTf)3 . Three distinct cyclization manifolds lead to the corresponding bioactive scaffolds in good yields. In addition, N-substituted indoles can be synthesized enantioselectively in the presence of a chiral phosphate.
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Affiliation(s)
- Vince M Lombardo
- Department of Chemistry, Center for Molecular Innovation and Drug Discovery, Chicago Tri-Institutional Center for Chemical Methods and Library Development (CT-CMLD), Northwestern University, 2145 Sheridan Road, Evanston, IL 60208 (USA)
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82
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Reimers T, Haberhauer G, Benkhäuser C, Schmidtchen FP, Lützen A, Lüning U. Enantiopure Chiral Concave N-Heterocyclic Carbene Precursors. European J Org Chem 2013. [DOI: 10.1002/ejoc.201300830] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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83
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Song X, Ni Q, Grossmann A, Enders D. N-Heterocyclic-Carbene-Catalyzed One-Pot Synthesis of Hydroxamic Esters. Chem Asian J 2013; 8:2965-9. [DOI: 10.1002/asia.201300938] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/16/2013] [Indexed: 11/11/2022]
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84
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Chen XY, Xia F, Cheng JT, Ye S. Highly enantioselective γ-amination by N-heterocyclic carbene catalyzed [4+2] annulation of oxidized enals and azodicarboxylates. Angew Chem Int Ed Engl 2013; 52:10644-7. [PMID: 23943127 DOI: 10.1002/anie.201305571] [Citation(s) in RCA: 94] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/28/2013] [Indexed: 11/09/2022]
Abstract
γ-Amination: The title reaction was developed to give the corresponding dihydropyridazinones in good yields with excellent enantioselectivities (see scheme; Mes=2,4,6-trimethylphenyl). The annulation reaction worked well for γ-aryl, γ-alkyl, or γ-alkenyl oxidized enals. Highly enantiopure tetrahydropyridazinones and γ-amino acid derivatives could be easily prepared by chemical transformations of the resulting dihydropyridazinones.
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Affiliation(s)
- Xiang-Yu Chen
- Beijing National Laboratory for Molecular Sciences, CAS Key Laboratory of Molecular Recognition and Function, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190 (China)
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85
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Chen XY, Xia F, Cheng JT, Ye S. Highly Enantioselective γ-Amination by N-Heterocyclic Carbene Catalyzed [4+2] Annulation of Oxidized Enals and Azodicarboxylates. Angew Chem Int Ed Engl 2013. [DOI: 10.1002/ange.201305571] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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86
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Hu C, Zhang Q, Huang Y. Phosphine-Catalyzed Rauhut-Currier Domino Reaction: A Facile Strategy for the Construction of Carbocyclic Spirooxindoles Skeletons. Chem Asian J 2013; 8:1981-4. [DOI: 10.1002/asia.201300650] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/10/2013] [Revised: 06/04/2013] [Indexed: 12/15/2022]
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87
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Mo J, Shen L, Chi YR. Direct β-activation of saturated aldehydes to formal Michael acceptors through oxidative NHC catalysis. Angew Chem Int Ed Engl 2013; 52:8588-91. [PMID: 23766245 DOI: 10.1002/anie.201302152] [Citation(s) in RCA: 127] [Impact Index Per Article: 11.5] [Reference Citation Analysis] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/14/2013] [Indexed: 11/12/2022]
Affiliation(s)
- Junming Mo
- Division of Chemistry & Biological Chemistry, School of Physical & Mathematical Sciences, Nanyang Technological University, Singapore 637371, Singapore
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88
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Mo J, Shen L, Chi YR. Direct β-Activation of Saturated Aldehydes to Formal Michael Acceptors through Oxidative NHC Catalysis. Angew Chem Int Ed Engl 2013. [DOI: 10.1002/ange.201302152] [Citation(s) in RCA: 41] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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89
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Li G, Liang T, Wojtas L, Antilla JC. An Asymmetric Diels-Alder Reaction Catalyzed by Chiral Phosphate Magnesium Complexes: Highly Enantioselective Synthesis of Chiral Spirooxindoles. Angew Chem Int Ed Engl 2013. [DOI: 10.1002/ange.201209295] [Citation(s) in RCA: 34] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
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90
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Li G, Liang T, Wojtas L, Antilla JC. An Asymmetric Diels-Alder Reaction Catalyzed by Chiral Phosphate Magnesium Complexes: Highly Enantioselective Synthesis of Chiral Spirooxindoles. Angew Chem Int Ed Engl 2013; 52:4628-32. [DOI: 10.1002/anie.201209295] [Citation(s) in RCA: 108] [Impact Index Per Article: 9.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/20/2012] [Revised: 01/08/2013] [Indexed: 01/22/2023]
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91
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Qi J, Xie X, Han R, Ma D, Yang J, She X. N-Heterocyclic Carbene (NHC)-Catalyzed/Lewis Acid Mediated Conjugate Umpolung of Alkynyl Aldehydes for the Synthesis of Butenolides: A Formal [3+2] Annulation. Chemistry 2013; 19:4146-50. [DOI: 10.1002/chem.201204386] [Citation(s) in RCA: 58] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/10/2012] [Indexed: 11/11/2022]
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92
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Hong L, Wang R. Recent Advances in Asymmetric Organocatalytic Construction of 3,3′-Spirocyclic Oxindoles. Adv Synth Catal 2013. [DOI: 10.1002/adsc.201200808] [Citation(s) in RCA: 611] [Impact Index Per Article: 55.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
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93
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Wu H, Zhang LL, Tian ZQ, Huang YD, Wang YM. Highly Efficient Enantioselective Construction of Bispirooxindoles Containing Three Stereocenters through an Organocatalytic Cascade Michael-Cyclization Reaction. Chemistry 2012; 19:1747-53. [DOI: 10.1002/chem.201203221] [Citation(s) in RCA: 108] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/10/2012] [Revised: 11/08/2012] [Indexed: 11/06/2022]
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94
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Wurz NE, Daniliuc CG, Glorius F. Highly enantioselective intermolecular Stetter reaction of simple acrylates: synthesis of α-chiral γ-ketoesters. Chemistry 2012; 18:16297-301. [PMID: 23154931 DOI: 10.1002/chem.201202432] [Citation(s) in RCA: 72] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/08/2012] [Revised: 10/11/2012] [Indexed: 11/09/2022]
Abstract
Simple Stetter: A novel N-heterocyclic carbene (NHC) was designed by combining an electron-rich 2,6-dimethoxy substituent and an underestimated yet promising chiral motif. With this NHC in hand, a highly enantioselective intermolecular Stetter reaction of simple acrylates was developed, yielding versatile α-chiral γ-ketoesters. This represents the first catalytic asymmetric route towards these valuable compounds (see scheme).
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Affiliation(s)
- Nathalie E Wurz
- Westfälische Wilhelms-Universität Münster, Organisch-Chemisches Institut, Corrensstrasse 40, 48149 Münster (Germany), Fax: (+49) 251-83-33202
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95
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Cohen DT, Eichman CC, Phillips EM, Zarefsky ER, Scheidt KA. Catalytic dynamic kinetic resolutions with N-heterocyclic carbenes: asymmetric synthesis of highly substituted β-lactones. Angew Chem Int Ed Engl 2012; 51:7309-13. [PMID: 22700327 PMCID: PMC3489928 DOI: 10.1002/anie.201203382] [Citation(s) in RCA: 98] [Impact Index Per Article: 8.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/02/2012] [Indexed: 11/11/2022]
Abstract
New DKR type: An N-heterocyclic carbene (NHC)-catalyzed dynamic kinetic resolution of racemic α-substituted β-keto esters has been developed. This method relies on the epimerization of an NHC-enol intermediate before subsequent aldol/acylation events. Highly substituted β-lactones are produced in good yield with good to excellent selectivities (see scheme).
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Affiliation(s)
- Daniel T. Cohen
- Department of Chemistry, Center for Molecular Innovation and Drug Discovery, Chemistry of Life Processes Institute Northwestern University, 2145 Sheridan Road, Evanston, IL 60208 (USA)
| | - Chad C. Eichman
- Department of Chemistry, Center for Molecular Innovation and Drug Discovery, Chemistry of Life Processes Institute Northwestern University, 2145 Sheridan Road, Evanston, IL 60208 (USA)
| | - Eric M. Phillips
- Department of Chemistry, Center for Molecular Innovation and Drug Discovery, Chemistry of Life Processes Institute Northwestern University, 2145 Sheridan Road, Evanston, IL 60208 (USA)
| | - Emily R. Zarefsky
- Department of Chemistry, Center for Molecular Innovation and Drug Discovery, Chemistry of Life Processes Institute Northwestern University, 2145 Sheridan Road, Evanston, IL 60208 (USA)
| | - Karl A. Scheidt
- Department of Chemistry, Center for Molecular Innovation and Drug Discovery, Chemistry of Life Processes Institute Northwestern University, 2145 Sheridan Road, Evanston, IL 60208 (USA)
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96
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Cohen DT, Eichman CC, Phillips EM, Zarefsky ER, Scheidt KA. Catalytic Dynamic Kinetic Resolutions with N-Heterocyclic Carbenes: Asymmetric Synthesis of Highly Substituted β-Lactones. Angew Chem Int Ed Engl 2012. [DOI: 10.1002/ange.201203382] [Citation(s) in RCA: 41] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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