51
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Kobayashi S, Tamanoi H, Hasegawa Y, Segawa Y, Masuyama A. Divergent Synthesis of Bioactive Resorcinols Isolated from the Fruiting Bodies of Hericium erinaceum: Total Syntheses of Hericenones A, B, and I, Hericenols B–D, and Erinacerins A and B. J Org Chem 2014; 79:5227-38. [DOI: 10.1021/jo500795z] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Shoji Kobayashi
- Department
of Applied Chemistry, Faculty of Engineering, Osaka Institute of Technology, 5-16-1 Ohmiya, Asahi-ku, Osaka 535-8585, Japan
| | - Hidetsugu Tamanoi
- Department
of Applied Chemistry, Faculty of Engineering, Osaka Institute of Technology, 5-16-1 Ohmiya, Asahi-ku, Osaka 535-8585, Japan
| | - Yuichi Hasegawa
- Department
of Applied Chemistry, Faculty of Engineering, Osaka Institute of Technology, 5-16-1 Ohmiya, Asahi-ku, Osaka 535-8585, Japan
| | - Yusuke Segawa
- Department
of Applied Chemistry, Faculty of Engineering, Osaka Institute of Technology, 5-16-1 Ohmiya, Asahi-ku, Osaka 535-8585, Japan
| | - Araki Masuyama
- Department
of Applied Chemistry, Faculty of Engineering, Osaka Institute of Technology, 5-16-1 Ohmiya, Asahi-ku, Osaka 535-8585, Japan
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52
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Lanier ML, Kasper AC, Kim H, Hong J. Synthesis of α,α'-trans-oxepanes through an organocatalytic oxa-conjugate addition reaction. Org Lett 2014; 16:2406-9. [PMID: 24724535 PMCID: PMC4018174 DOI: 10.1021/ol500773w] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
Abstract
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Oxepanes
are found in a wide range of natural products; however,
they are challenging synthetic targets due to enthalpic and entropic
barriers. Organocatalytic oxa-conjugate addition reactions promoted
by the gem-disubstituent (Thorpe–Ingold) effect
stereoselectively provided α,α′-trans-oxepanes. In addition, the potential of an organocatalytic tandem
oxa-conjugate addition/α-oxidation was demonstrated in a rapid
generation of molecular complexity. These organocatalytic oxa-conjugate
addition reactions would provide powerful tools for the synthesis
of natural products that contain highly functionalized oxepanes.
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Affiliation(s)
- Megan L Lanier
- Department of Chemistry, Duke University , Durham, North Carolina 27708, United States
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53
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Akagawa K, Nishi N, Sen J, Kudo K. Peptide-catalyzed consecutive 1,6- and 1,4-additions of thiols to α,β,γ,δ-unsaturated aldehydes. Org Biomol Chem 2014; 12:3581-5. [PMID: 24769865 DOI: 10.1039/c4ob00565a] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Abstract
Regio- and enantioselective addition of thiols to α,β,γ,δ-unsaturated aldehydes was performed with a resin-supported peptide catalyst. It was shown that a 1,4-adduct was generated mainly at the initial stage of the reaction, and this was eventually converted to a thermodynamically stable 1,6- and 1,4-diadduct through retro-addition/addition reactions.
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Affiliation(s)
- Kengo Akagawa
- Institute of Industrial Science, University of Tokyo, 4-6-1 Komaba, Meguro-ku, Tokyo 153-8505, Japan.
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54
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Ogawa KA, Boydston AJ. Organocatalyzed Anodic Oxidation of Aldehydes to Thioesters. Org Lett 2014; 16:1928-31. [DOI: 10.1021/ol500459x] [Citation(s) in RCA: 72] [Impact Index Per Article: 7.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
Affiliation(s)
- Kelli A. Ogawa
- Department of Chemistry, University of Washington, Seattle, Washington 98195, United States
| | - Andrew J. Boydston
- Department of Chemistry, University of Washington, Seattle, Washington 98195, United States
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55
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Tong YF, Mao JH, Wu S, Zhao Y, Cheng Y. Changing the reaction pathway by NHC/Brønsted base cooperative catalysis: highly stereoselective synthesis of multifunctional benzo[a]fluoren-11-ones from the dimerization of 2-(aroylvinyl)arylaldehydes. J Org Chem 2014; 79:2075-81. [PMID: 24502669 DOI: 10.1021/jo4027758] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Abstract
The unprecedented NHC/Brønsted base-cocatalyzed dimerization reaction of 2-(aroylvinyl)arylaldehydes was reported. In the presence of a triazole carbene catalyst alone, no reaction of 2-(aroylvinyl)arylaldehydes was observed. However, the combination of triazole carbene and 4-methoxyphenolate efficiently catalyzed the dimerization of 2-(aroylvinyl)arylaldehydes to proceed through a benzoin-Michael-Michael reaction cascade, producing 6-aroyl-5-(aroylmethyl)-11a-hydroxybenzo[a]fluoren-11-ones as the sole diastereomers in good yields.
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Affiliation(s)
- Yuan-feng Tong
- College of Chemistry, Beijing Normal University , Beijing 100875, People's Republic of China
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56
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Prieto L, Talavera G, Uria U, Reyes E, Vicario JL, Carrillo L. Favoring Trienamine Activation through Unconjugated Dienals: Organocatalytic Enantioselective Remote Functionalization of Alkenes. Chemistry 2014; 20:2145-8. [DOI: 10.1002/chem.201304666] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/28/2013] [Indexed: 11/09/2022]
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57
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Halskov KS, Naicker T, Jensen ME, Jørgensen KA. Organocatalytic asymmetric remote aziridination of 2,4-dienals. Chem Commun (Camb) 2014; 49:6382-4. [PMID: 23748437 DOI: 10.1039/c3cc43506g] [Citation(s) in RCA: 69] [Impact Index Per Article: 6.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Abstract
Highly regio- and stereoselective remote aziridination of 2,4-dienals has been developed, based on a vinylogous iminium-ion-dienamine catalytic cascade reaction. Transformations of the aziridine products into enantioenriched motifs are also demonstrated. Furthermore, the reaction concept is extended to include enantioselective 1,6-addition of thiols.
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Affiliation(s)
- Kim Søholm Halskov
- Center for Catalysis, Aarhus University, Langelandsgade 140, DK-8000 Aarhus C, Denmark
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58
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Samanta RC, Studer A. N-heterocyclic carbene catalysed oxidative esterification of aliphatic aldehydes. Org Chem Front 2014. [DOI: 10.1039/c4qo00164h] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Aliphatic aldehydes are readily transformed to the corresponding esters by oxidative carbene catalysis.
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Affiliation(s)
- Ramesh C. Samanta
- Organisch-Chemisches Institut and NRW Graduate School of Chemistry
- Westfalische Wilhelms-Universitat
- Munster, Germany
| | - Armido Studer
- Organisch-Chemisches Institut and NRW Graduate School of Chemistry
- Westfalische Wilhelms-Universitat
- Munster, Germany
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59
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Silvi M, Chatterjee I, Liu Y, Melchiorre P. Controlling the Molecular Topology of Vinylogous Iminium Ions by Logical Substrate Design: Highly Regio- and Stereoselective Aminocatalytic 1,6-Addition to Linear 2,4-Dienals. Angew Chem Int Ed Engl 2013; 52:10780-3. [DOI: 10.1002/anie.201305870] [Citation(s) in RCA: 97] [Impact Index Per Article: 8.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/06/2013] [Revised: 08/02/2013] [Indexed: 01/03/2023]
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60
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Silvi M, Chatterjee I, Liu Y, Melchiorre P. Controlling the Molecular Topology of Vinylogous Iminium Ions by Logical Substrate Design: Highly Regio- and Stereoselective Aminocatalytic 1,6-Addition to Linear 2,4-Dienals. Angew Chem Int Ed Engl 2013. [DOI: 10.1002/ange.201305870] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
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61
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Silver carboxylate promoted lactonization: a general method applicable to prepare medium and large-sized lactones without high dilution or slow addition. Tetrahedron 2013. [DOI: 10.1016/j.tet.2013.07.064] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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62
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Dell'Amico L, Albrecht Ł, Naicker T, Poulsen PH, Jørgensen KA. Beyond classical reactivity patterns: shifting from 1,4- to 1,6-additions in regio- and enantioselective organocatalyzed vinylogous reactions of olefinic lactones with enals and 2,4-dienals. J Am Chem Soc 2013; 135:8063-70. [PMID: 23654285 DOI: 10.1021/ja4029928] [Citation(s) in RCA: 124] [Impact Index Per Article: 11.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
Abstract
Organocatalysis is shown to expand the classical reactivity pattern for conjugate addition reactions. It is demonstrated that the site selectivity can be extended from 1,4- to 1,6-additions for the enantioselective vinylogous additions of methyl-substituted vinylogous lactones to enals and 2,4-dienals. This novel reactivity is demonstrated for methyl-substituted olefinic azlactones and butyrolactones. Their synthetic potential is first highlighted by the development of the organocatalytic regioselective vinylogous 1,4-addition to enals which proceeds with a very high level of double-bond geometry control and excellent enantioselectivity. The concept is developed further for the unprecedented intermolecular enantioselective organocatalyzed vinylogous 1,6-addition to linear 2,4-dienals, by which the site selectivity of the process is extended from the β-position to the remote δ-position of the 2,4-dienal. The organocatalyst controls the newly generated stereocenter six bonds away from the stereocenter of the catalyst with a high level of enantiocontrol, and the products are obtained with full control of double-bonds configuration. The scope of these new reaction concepts is demonstrated for a series of aliphatic and aryl-substituted enals and 2,4-dienals undergoing enantioselective vinylogous reactions with methyl-substituted olefinic azlactones and butyrolactones. Furthermore, mechanistic considerations are presented which can account for the change from 1,4- to 1,6-selectivity. Finally, a number of different transformations of the optically active 1,4- and 1,6-addition products are demonstrated.
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Affiliation(s)
- Luca Dell'Amico
- Center for Catalysis, Department of Chemistry, Aarhus University, DK-8000 Aarhus C, Denmark
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63
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Waldeck AR, Krische MJ. Total synthesis of cyanolide A in the absence of protecting groups, chiral auxiliaries, or premetalated carbon nucleophiles. Angew Chem Int Ed Engl 2013; 52:4470-3. [PMID: 23495211 PMCID: PMC3730532 DOI: 10.1002/anie.201300843] [Citation(s) in RCA: 51] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2013] [Indexed: 02/06/2023]
Affiliation(s)
- Andrew R. Waldeck
- University of Texas at Austin, Department of Chemistry and Biochemistry, 1 University Station—A5300, Austin, TX 78712-1167 (USA)
| | - Michael J. Krische
- University of Texas at Austin, Department of Chemistry and Biochemistry, 1 University Station—A5300, Austin, TX 78712-1167 (USA)
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64
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Waldeck AR, Krische MJ. Total Synthesis of Cyanolide A in the Absence of Protecting Groups, Chiral Auxiliaries, or Premetalated Carbon Nucleophiles. Angew Chem Int Ed Engl 2013. [DOI: 10.1002/ange.201300843] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/16/2023]
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65
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De Sarkar S, Biswas A, Samanta RC, Studer A. Catalysis with N-Heterocyclic Carbenes under Oxidative Conditions. Chemistry 2013; 19:4664-78. [DOI: 10.1002/chem.201203707] [Citation(s) in RCA: 411] [Impact Index Per Article: 37.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/17/2012] [Indexed: 11/05/2022]
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66
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Okano T. Heterocyclic synthesis via catalysis of N-heterocyclic carbenes: very classical and very modern chemical species. HETEROCYCL COMMUN 2013. [DOI: 10.1515/hc-2013-0075] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023] Open
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67
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Kiran INC, Lalwani K, Sudalai A. N-Heterocyclic carbene catalyzed esterification of aromatic aldehydes with alcohols under aerobic conditions. RSC Adv 2013. [DOI: 10.1039/c2ra22718e] [Citation(s) in RCA: 40] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023] Open
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68
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Samanta RC, De Sarkar S, Fröhlich R, Grimme S, Studer A. N-Heterocyclic carbene (NHC) catalyzed chemoselective acylation of alcohols in the presence of amines with various acylating reagents. Chem Sci 2013. [DOI: 10.1039/c3sc00099k] [Citation(s) in RCA: 72] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
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69
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Delany EG, Fagan CL, Gundala S, Mari A, Broja T, Zeitler K, Connon SJ. NHC-catalysed aerobic aldehyde-esterifications with alcohols: no additives or cocatalysts required. Chem Commun (Camb) 2013; 49:6510-2. [DOI: 10.1039/c3cc42596g] [Citation(s) in RCA: 56] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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70
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Jurberg ID, Chatterjee I, Tannert R, Melchiorre P. When asymmetric aminocatalysis meets the vinylogy principle. Chem Commun (Camb) 2013; 49:4869-83. [DOI: 10.1039/c3cc41270a] [Citation(s) in RCA: 207] [Impact Index Per Article: 18.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
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71
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Izquierdo J, Hutson GE, Cohen DT, Scheidt KA. A continuum of progress: applications of N-hetereocyclic carbene catalysis in total synthesis. Angew Chem Int Ed Engl 2012; 51:11686-98. [PMID: 23074146 PMCID: PMC3756610 DOI: 10.1002/anie.201203704] [Citation(s) in RCA: 464] [Impact Index Per Article: 38.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/14/2012] [Indexed: 11/08/2022]
Abstract
N-Heterocyclic carbene (NHC) catalyzed transformations have emerged as powerful tactics for the construction of complex molecules. Since Stetter's report in 1975 of the total synthesis of cis-jasmon and dihydrojasmon by using carbene catalysis, the use of NHCs in total synthesis has grown rapidly, particularly over the last decade. This renaissance is undoubtedly due to the recent developments in NHC-catalyzed reactions, including new benzoin, Stetter, homoenolate, and aroylation processes. These transformations employ typical as well as Umpolung types of bond disconnections and have served as the key step in several new total syntheses. This Minireview highlights these reports and captures the excitement and emerging synthetic utility of carbene catalysis in total synthesis.
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Affiliation(s)
- Javier Izquierdo
- Department of Chemistry, Center for Molecular Innovation and Drug Discovery, Chemistry of Life Processes Institute, Silverman Hall, Northwestern University, Evanston, IL 60208 (USA)
| | - Gerri E. Hutson
- Department of Chemistry, Center for Molecular Innovation and Drug Discovery, Chemistry of Life Processes Institute, Silverman Hall, Northwestern University, Evanston, IL 60208 (USA)
| | - Daniel T. Cohen
- Department of Chemistry, Center for Molecular Innovation and Drug Discovery, Chemistry of Life Processes Institute, Silverman Hall, Northwestern University, Evanston, IL 60208 (USA)
| | - Karl A. Scheidt
- Department of Chemistry, Center for Molecular Innovation and Drug Discovery, Chemistry of Life Processes Institute, Silverman Hall, Northwestern University, Evanston, IL 60208 (USA)
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72
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Izquierdo J, Hutson GE, Cohen DT, Scheidt KA. Anwendungen der Katalyse mit N-heterocyclischen Carbenen in Totalsynthesen. Angew Chem Int Ed Engl 2012. [DOI: 10.1002/ange.201203704] [Citation(s) in RCA: 169] [Impact Index Per Article: 14.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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73
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Finney EE, Ogawa KA, Boydston AJ. Organocatalyzed Anodic Oxidation of Aldehydes. J Am Chem Soc 2012; 134:12374-7. [DOI: 10.1021/ja304716r] [Citation(s) in RCA: 130] [Impact Index Per Article: 10.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Eric E. Finney
- Department
of Chemistry, University of Washington, Seattle, Washington 98195, United States
| | - Kelli A. Ogawa
- Department
of Chemistry, University of Washington, Seattle, Washington 98195, United States
| | - Andrew J. Boydston
- Department
of Chemistry, University of Washington, Seattle, Washington 98195, United States
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74
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Wilson MR, Taylor RE. Toward an enantioselective synthesis of (-)-zampanolide: preparation of the C9-C20 region. Org Lett 2012; 14:3408-11. [PMID: 22720980 DOI: 10.1021/ol301383a] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Progress toward the synthesis of the microtubule-stabilizing agent, (-)-zampanolide, is reported. Construction of the 2,6-cis-tetrahydropyran ring was accomplished utilizing ether transfer methodology in conjunction with an intramolecular radical cyclization reaction. Efficient installation of the C16-C20 side chain relied on a one-pot cross-metathesis/olefination sequence, Sharpless epoxidation, and selective reduction of a vinyl epoxide.
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Affiliation(s)
- Matthew R Wilson
- Department of Chemistry and Biochemistry and the Walther Cancer Research Center, University of Notre Dame, 251 Nieuwland Science Hall, Notre Dame, Indiana 46556-5670, USA
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