1
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Polydentate P, N-based ligands for palladium-catalyzed cross-coupling reactions. MOLECULAR CATALYSIS 2022. [DOI: 10.1016/j.mcat.2022.112699] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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2
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Abstract
The asymmetric alkylation of enolates is a particularly versatile method for the construction of α-stereogenic carbonyl motifs, which are ubiquitous in synthetic chemistry. Over the past several decades, the focus has shifted to the development of new catalytic methods that depart from classical stoichiometric stereoinduction strategies (e.g., chiral auxiliaries, chiral alkali metal amide bases, chiral electrophiles, etc.). In this way, the enantioselective alkylation of prochiral enolates greatly improves the step- and redox-economy of this process, in addition to enhancing the scope and selectivity of these reactions. In this review, we summarize the origin and advancement of catalytic enantioselective enolate alkylation methods, with a directed emphasis on the union of prochiral nucleophiles with carbon-centered electrophiles for the construction of α-stereogenic carbonyl derivatives. Hence, the transformative developments for each distinct class of nucleophile (e.g., ketone enolates, ester enolates, amide enolates, etc.) are presented in a modular format to highlight the state-of-the-art methods and current limitations in each area.
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Affiliation(s)
- Timothy B Wright
- Department of Chemistry, Queen's University, 90 Bader Lane, Kingston, Ontario K7L 3N6, Canada
| | - P Andrew Evans
- Department of Chemistry, Queen's University, 90 Bader Lane, Kingston, Ontario K7L 3N6, Canada.,Xiangya School of Pharmaceutical Sciences, Central South University, Changsha 410013, Hunan, P. R. of China
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3
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Pàmies O, Margalef J, Cañellas S, James J, Judge E, Guiry PJ, Moberg C, Bäckvall JE, Pfaltz A, Pericàs MA, Diéguez M. Recent Advances in Enantioselective Pd-Catalyzed Allylic Substitution: From Design to Applications. Chem Rev 2021; 121:4373-4505. [PMID: 33739109 PMCID: PMC8576828 DOI: 10.1021/acs.chemrev.0c00736] [Citation(s) in RCA: 212] [Impact Index Per Article: 70.7] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/14/2020] [Indexed: 12/30/2022]
Abstract
This Review compiles the evolution, mechanistic understanding, and more recent advances in enantioselective Pd-catalyzed allylic substitution and decarboxylative and oxidative allylic substitutions. For each reaction, the catalytic data, as well as examples of their application to the synthesis of more complex molecules, are collected. Sections in which we discuss key mechanistic aspects for high selectivity and a comparison with other metals (with advantages and disadvantages) are also included. For Pd-catalyzed asymmetric allylic substitution, the catalytic data are grouped according to the type of nucleophile employed. Because of the prominent position of the use of stabilized carbon nucleophiles and heteronucleophiles, many chiral ligands have been developed. To better compare the results, they are presented grouped by ligand types. Pd-catalyzed asymmetric decarboxylative reactions are mainly promoted by PHOX or Trost ligands, which justifies organizing this section in chronological order. For asymmetric oxidative allylic substitution the results are grouped according to the type of nucleophile used.
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Affiliation(s)
- Oscar Pàmies
- Universitat
Rovira i Virgili, Departament de
Química Física i Inorgànica, C/Marcel·lí Domingo, 1, 43007 Tarragona, Spain
| | - Jèssica Margalef
- Universitat
Rovira i Virgili, Departament de
Química Física i Inorgànica, C/Marcel·lí Domingo, 1, 43007 Tarragona, Spain
| | - Santiago Cañellas
- Discovery
Sciences, Janssen Research and Development, Janssen-Cilag, S.A. Jarama 75A, 45007, Toledo, Spain
| | - Jinju James
- Centre
for Synthesis and Chemical Biology, School of Chemistry, University College Dublin, Belfield, Dublin 4, Ireland
| | - Eric Judge
- Centre
for Synthesis and Chemical Biology, School of Chemistry, University College Dublin, Belfield, Dublin 4, Ireland
| | - Patrick J. Guiry
- Centre
for Synthesis and Chemical Biology, School of Chemistry, University College Dublin, Belfield, Dublin 4, Ireland
| | - Christina Moberg
- KTH
Royal Institute of Technology, Department of Chemistry, Organic Chemistry, SE 100 44 Stockholm, Sweden
| | - Jan-E. Bäckvall
- Department
of Organic Chemistry, Arrhenius Laboratory, Stockholm University, SE 106 91 Stockholm, Sweden
| | - Andreas Pfaltz
- Department
of Chemistry, University of Basel. St. Johanns-Ring 19, 4056 Basel, Switzerland
| | - 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. 08028 Barcelona, Spain
| | - Montserrat Diéguez
- Universitat
Rovira i Virgili, Departament de
Química Física i Inorgànica, C/Marcel·lí Domingo, 1, 43007 Tarragona, Spain
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4
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Junk L, Kazmaier U. The Allylic Alkylation of Ketone Enolates. ChemistryOpen 2020; 9:929-952. [PMID: 32953384 PMCID: PMC7482671 DOI: 10.1002/open.202000175] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/12/2020] [Revised: 08/03/2020] [Indexed: 01/14/2023] Open
Abstract
The palladium-catalyzed allylic alkylation of non-stabilized ketone enolates was thought for a long time to be not as efficient as the analogous reactions of stabilized enolates, e. g. of malonates and β-ketoesters. The field has experienced a rapid development during the last two decades, with a range of new, highly efficient protocols evolved. In this review, the early developments as well as current methods and applications of palladium-catalyzed ketone enolate allylations will be discussed.
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Affiliation(s)
- Lukas Junk
- Organic Chemistry ISaarland UniversityCampus C4.266123SaarbrückenGermany
| | - Uli Kazmaier
- Organic Chemistry ISaarland UniversityCampus C4.266123SaarbrückenGermany
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5
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Liang H, Zhou X, Zheng L, Wang J. Enantioselective Organocatalytic Desymmetrization of Cyclopentene-1,3-diones through Formal C(sp2)–H Amidation. J Org Chem 2019; 84:11306-11315. [DOI: 10.1021/acs.joc.9b01678] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
Affiliation(s)
- Hao Liang
- Key Laboratory of Bioinorganic and Synthetic Chemistry of Ministry of Education, School of Chemistry, Sun Yat-Sen University, Guangzhou, 510275, People’s Republic of China
| | - Xiaotong Zhou
- Key Laboratory of Bioinorganic and Synthetic Chemistry of Ministry of Education, School of Chemistry, Sun Yat-Sen University, Guangzhou, 510275, People’s Republic of China
| | - Liyao Zheng
- Key Laboratory of Bioinorganic and Synthetic Chemistry of Ministry of Education, School of Chemistry, Sun Yat-Sen University, Guangzhou, 510275, People’s Republic of China
| | - Jun Wang
- Key Laboratory of Bioinorganic and Synthetic Chemistry of Ministry of Education, School of Chemistry, Sun Yat-Sen University, Guangzhou, 510275, People’s Republic of China
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6
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Vargas DF, Larghi EL, Kaufman TS. The 6π-azaelectrocyclization of azatrienes. Synthetic applications in natural products, bioactive heterocycles, and related fields. Nat Prod Rep 2019; 36:354-401. [PMID: 30090891 DOI: 10.1039/c8np00014j] [Citation(s) in RCA: 26] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Abstract
Covering: 2006 to 2018 The application of the 6π-azaelectrocyclization of azatrienes as a key strategy for the synthesis of natural products, their analogs and related bioactive or biomedically-relevant compounds (from 2006 to date) is comprehensively reviewed. Details about reaction optimization studies, relevant reaction mechanisms and conditions are also discussed.
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Affiliation(s)
- Didier F Vargas
- Instituto de Química Rosario (IQUIR, CONICET-UNR), Facultad de Ciencias Bioquímicas y Farmacéuticas - Universidad Nacional de Rosario, Suipacha 531, 2000 Rosario, Argentina.
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7
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Harned AM, Stoltz BM. Development of a catalytic enantioselective synthesis of the guanacastepene and heptemerone tricyclic core. Tetrahedron 2019; 75:3166-3177. [PMID: 31937979 PMCID: PMC6959853 DOI: 10.1016/j.tet.2019.02.053] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
For nearly two decades, synthetic chemists have been fascinated by the structural complexity and synthetic challenges afforded by the guanacastepene and heptemerone diterpenoids.Numerous synthetic approaches to these compounds have been reported, but to date the application of enantioselective catalysis to this problem has not been realized. Herein we report an enantioselective synthesis of an advanced intermediate corresponding to the tricyclic core common to the guanacastepenes and heptemerones. Highlights of this work include sequential Pd-catalyzed decarboxylative allylic alkylation reactions to generate the two all carbon quaternary stereocenters, the use of ring-closing metathesis to close the A ring in the presence of a distal allyl sidechain, and a region and diastereoselective oxidation of an trienol ether to introduce oxygenation on the A ring.
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Affiliation(s)
- Andrew M Harned
- The Warren and Katharine Schlinger Laboratory of Chemistry and Chemical Engineering, California Institute of Technology, Pasadena, California 91125, United States
- Department of Chemistry & Biochemistry, Texas Tech University, 1204 Boston Ave, Lubbock, Texas 79409, United States
| | - Brian M Stoltz
- The Warren and Katharine Schlinger Laboratory of Chemistry and Chemical Engineering, California Institute of Technology, Pasadena, California 91125, United States
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8
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Yamano MM, Knapp RR, Ngamnithiporn A, Ramirez M, Houk KN, Stoltz BM, Garg NK. Cycloadditions of Oxacyclic Allenes and a Catalytic Asymmetric Entryway to Enantioenriched Cyclic Allenes. Angew Chem Int Ed Engl 2019. [DOI: 10.1002/ange.201900503] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Michael M. Yamano
- Department of Chemistry and Biochemistry University of California, Los Angeles Los Angeles CA 90095 USA
| | - Rachel R. Knapp
- Department of Chemistry and Biochemistry University of California, Los Angeles Los Angeles CA 90095 USA
| | - Aurapat Ngamnithiporn
- The Warren and Katharine Schlinger Laboratory of Chemistry and Chemical Engineering California Institute of Technology Pasadena CA 91125 USA
| | - Melissa Ramirez
- Department of Chemistry and Biochemistry University of California, Los Angeles Los Angeles CA 90095 USA
| | - Kendall N. Houk
- Department of Chemistry and Biochemistry University of California, Los Angeles Los Angeles CA 90095 USA
| | - Brian M. Stoltz
- The Warren and Katharine Schlinger Laboratory of Chemistry and Chemical Engineering California Institute of Technology Pasadena CA 91125 USA
| | - Neil K. Garg
- Department of Chemistry and Biochemistry University of California, Los Angeles Los Angeles CA 90095 USA
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9
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Yamano MM, Knapp RR, Ngamnithiporn A, Ramirez M, Houk KN, Stoltz BM, Garg NK. Cycloadditions of Oxacyclic Allenes and a Catalytic Asymmetric Entryway to Enantioenriched Cyclic Allenes. Angew Chem Int Ed Engl 2019; 58:5653-5657. [PMID: 30811080 PMCID: PMC6456397 DOI: 10.1002/anie.201900503] [Citation(s) in RCA: 36] [Impact Index Per Article: 7.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/21/2019] [Indexed: 01/19/2023]
Abstract
The chemistry of strained cyclic alkynes has undergone a renaissance over the past two decades. However, a related species, strained cyclic allenes, especially heterocyclic derivatives, have only recently resurfaced and represent another class of valuable intermediates. We report a mild and facile means to generate the parent 3,4-oxacyclic allene from a readily accessible silyl triflate precursor, and then trap it in (4+2), (3+2), and (2+2) reactions to provide a variety of cycloadducts. In addition, we describe a catalytic, decarboxylative asymmetric allylic alkylation performed on an α-silylated substrate, to ultimately permit access to an enantioenriched allene. Generation and trapping of the enantioenriched cyclic allene occurs with complete transfer of stereochemical information in a Diels-Alder cycloaddition through a point-chirality, axial-chirality, point-chirality transfer process.
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Affiliation(s)
- Michael M Yamano
- Department of Chemistry and Biochemistry, University of California, Los Angeles, Los Angeles, CA, 90095, USA
| | - Rachel R Knapp
- Department of Chemistry and Biochemistry, University of California, Los Angeles, Los Angeles, CA, 90095, USA
| | - Aurapat Ngamnithiporn
- The Warren and Katharine Schlinger Laboratory of Chemistry and Chemical Engineering, California Institute of Technology, Pasadena, CA, 91125, USA
| | - Melissa Ramirez
- Department of Chemistry and Biochemistry, University of California, Los Angeles, Los Angeles, CA, 90095, USA
| | - Kendall N Houk
- Department of Chemistry and Biochemistry, University of California, Los Angeles, Los Angeles, CA, 90095, USA
| | - Brian M Stoltz
- The Warren and Katharine Schlinger Laboratory of Chemistry and Chemical Engineering, California Institute of Technology, Pasadena, CA, 91125, USA
| | - Neil K Garg
- Department of Chemistry and Biochemistry, University of California, Los Angeles, Los Angeles, CA, 90095, USA
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10
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Krout MR, Henry CE, Jensen T, Wu KL, Virgil SC, Stoltz BM. Wolff/Cope Approach to the AB Ring of the Sesterterpenoid Variecolin. J Org Chem 2018; 83:6995-7009. [PMID: 29298482 PMCID: PMC6035096 DOI: 10.1021/acs.joc.7b02972] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
A stereoselective synthesis of the AB ring of the complex sesterterpenoid variecolin is presented. Our strategy features the development of a tandem Wolff/Cope rearrangement of α-diazo cyclobutyl ketones for the construction of fused, 8-membered carbocycles. Preliminary studies revealed a facile Wolff rearrangement but a difficult vinyl ketene cyclobutane Cope rearrangement. We have leveraged an efficient microwave-promoted tandem rearrangement to prepare the desired functionalized cyclooctadienones that we envision as potential key intermediates in the convergent synthesis of variecolin.
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Affiliation(s)
- Michael R Krout
- Department of Chemistry , Bucknell University , Lewisburg , Pennsylvania 17837 , United States
| | - Christopher E Henry
- Process Chemistry , Achaogen, Inc. , South San Francisco , California 94080 , United States
| | - Thomas Jensen
- Discovery Chemistry and DMPK , Neuroscience Drug Discovery , H. Lundbeck A/S , 2500 Valby , Denmark
| | - Kun-Liang Wu
- Process Chemistry , Seattle Genetics , Bothell , Washington 98021 , United States
| | - Scott C Virgil
- Warren and Katharine Schlinger Laboratory for Chemistry and Chemical Engineering, Division of Chemistry and Chemical Engineering , California Institute of Technology , Pasadena , California 91125 , United States
| | - Brian M Stoltz
- Warren and Katharine Schlinger Laboratory for Chemistry and Chemical Engineering, Division of Chemistry and Chemical Engineering , California Institute of Technology , Pasadena , California 91125 , United States
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11
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Merchant R, Oberg KM, Lin Y, Novak AJE, Felding J, Baran PS. Divergent Synthesis of Pyrone Diterpenes via Radical Cross Coupling. J Am Chem Soc 2018; 140:7462-7465. [PMID: 29921130 PMCID: PMC6016063 DOI: 10.1021/jacs.8b04891] [Citation(s) in RCA: 64] [Impact Index Per Article: 10.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/09/2018] [Indexed: 11/30/2022]
Abstract
A divergent strategy for assembling pyrone diterpenes is presented. Capitalizing on the unique stereo- and chemoselectivity features of radical-based chemistry, the core decalin of these structures is efficiently forged using an electrochemically assisted oxidative radical polycyclization while key peripheral substituents are appended using decarboxylative radical cross couplings. In this way, access to four natural products (subglutinols A/B, higginsianin A, and sesquicillin A) is achieved in a concise and stereocontrolled fashion that is modular and amenable to future medicinal chemistry explorations.
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Affiliation(s)
- Rohan
R. Merchant
- Department
of Chemistry, The Scripps Research Institute, 10550 North Torrey Pines Road, La Jolla, California 92037, United States
| | - Kevin M. Oberg
- Department
of Chemistry, The Scripps Research Institute, 10550 North Torrey Pines Road, La Jolla, California 92037, United States
| | - Yutong Lin
- Department
of Chemistry, The Scripps Research Institute, 10550 North Torrey Pines Road, La Jolla, California 92037, United States
| | - Alexander J. E. Novak
- Department
of Chemistry, The Scripps Research Institute, 10550 North Torrey Pines Road, La Jolla, California 92037, United States
| | - Jakob Felding
- Front
End Innovation, LEO Pharma, A/S Industriparken 55, 2750 Ballerup, Denmark
| | - Phil S. Baran
- Department
of Chemistry, The Scripps Research Institute, 10550 North Torrey Pines Road, La Jolla, California 92037, United States
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12
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Ling T, Rivas F. All-carbon quaternary centers in natural products and medicinal chemistry: recent advances. Tetrahedron 2016. [DOI: 10.1016/j.tet.2016.09.002] [Citation(s) in RCA: 155] [Impact Index Per Article: 19.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
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13
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Affiliation(s)
- Lingxing Meng
- State Key Laboratory of Bioorganic & Natural Products Chemistry, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, 345 Lingling Lu, Shanghai 200032, China
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14
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Simeonov SP, Nunes JPM, Guerra K, Kurteva VB, Afonso CAM. Synthesis of Chiral Cyclopentenones. Chem Rev 2016; 116:5744-893. [DOI: 10.1021/cr500504w] [Citation(s) in RCA: 159] [Impact Index Per Article: 19.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Affiliation(s)
- Svilen P. Simeonov
- Institute
of Organic Chemistry with Centre of Phytochemistry, Bulgarian Academy of Sciences, Acad. G. Bonchev str, bl.9, 1113 Sofia, Bulgaria
| | - João P. M. Nunes
- Department
of Chemistry, University College London, London WC1H 0AJ, United Kingdom
| | - Krassimira Guerra
- Research
Institute for Medicines (iMed.ULisboa), Faculty of Pharmacy, Universidade de Lisboa, Av. Prof. Gama Pinto, 1649-003 Lisboa, Portugal
| | - Vanya B. Kurteva
- Institute
of Organic Chemistry with Centre of Phytochemistry, Bulgarian Academy of Sciences, Acad. G. Bonchev str, bl.9, 1113 Sofia, Bulgaria
| | - Carlos A. M. Afonso
- Research
Institute for Medicines (iMed.ULisboa), Faculty of Pharmacy, Universidade de Lisboa, Av. Prof. Gama Pinto, 1649-003 Lisboa, Portugal
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15
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Liu HC, Liu K, Xue ZY, He ZL, Wang CJ. Silver(I)-Catalyzed Enantioselective Desymmetrization of Cyclopentenediones: Access to Highly Functionalized Bicyclic Pyrrolidines. Org Lett 2015; 17:5440-3. [DOI: 10.1021/acs.orglett.5b02810] [Citation(s) in RCA: 46] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Hua-Chao Liu
- College
of Chemistry and Molecular Sciences, Wuhan University, Wuhan 430072 China
| | - Kang Liu
- College
of Chemistry and Molecular Sciences, Wuhan University, Wuhan 430072 China
| | - Zhi-Yong Xue
- College
of Chemistry and Molecular Sciences, Wuhan University, Wuhan 430072 China
| | - Zhao-Lin He
- College
of Chemistry and Molecular Sciences, Wuhan University, Wuhan 430072 China
| | - Chun-Jiang Wang
- College
of Chemistry and Molecular Sciences, Wuhan University, Wuhan 430072 China
- State
Key Laboratory of Elemento-organic Chemistry, Nankai University, Tianjin 300071, China
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16
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Beng TK, Sincavage K, Silaire AWV, Alwali A, Bassler DP, Spence LE, Beale O. Direct access to functionalized benzotropones, azepanes, and piperidines by reductive cross-coupling of α-bromo enones with α-bromo enamides. Org Biomol Chem 2015; 13:5349-53. [DOI: 10.1039/c5ob00517e] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
Abstract
High-yielding syntheses of functionalized azepenes and piperidines, bearing an α-benzotropone derivative, have been achieved through cobalt-catalysed reductive cross-coupling of α-bromo enamides with α-bromo enones.
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Affiliation(s)
| | | | | | - Amir Alwali
- Department of Chemistry
- Susquehanna University
- Selinsgrove
- USA
| | | | | | - Oliver Beale
- Department of Chemistry
- Susquehanna University
- Selinsgrove
- USA
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17
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Rambla M, Duroure L, Chabaud L, Guillou C. Enantioselective Synthesis of Spiroimines by Asymmetric Decarboxylative Alkylation/Isomerization/[3+2]-Cycloaddition Reaction of Azidoalkenes. European J Org Chem 2014. [DOI: 10.1002/ejoc.201403161] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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18
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First Example of the Intermolecular Palladium-Catalyzed Asymmetric Allylic Alkylation of Hydroxyacrylates: Synthesis of All-Carbon α-Aryl Quaternary Aldehydes. European J Org Chem 2014. [DOI: 10.1002/ejoc.201402911] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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19
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Hong AY, Stoltz BM. Biosynthesis and chemical synthesis of presilphiperfolanol natural products. Angew Chem Int Ed Engl 2014; 53:5248-60. [PMID: 24771653 PMCID: PMC4334158 DOI: 10.1002/anie.201309494] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/31/2013] [Indexed: 11/09/2022]
Abstract
Presilphiperfolanols constitute a family of biosynthetically important sesquiterpenes which can rearrange to diverse sesquiterpenoid skeletons. While the origin of these natural products can be traced to simple linear terpene precursors, the details of the enzymatic cyclization mechanism that forms the stereochemically dense tricyclic skeleton has required extensive biochemical, computational, and synthetic investigation. Parallel efforts to prepare the unique and intriguing structures of these compounds by total synthesis have also inspired novel strategies, thus resulting in four synthetic approaches and two completed syntheses. While the biosynthesis and chemical synthesis studies performed to date have provided much insight into the role and properties of these molecules, emerging questions regarding the biosynthesis of newer members of the family and subtle details of rearrangement mechanisms have yet to be explored.
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Affiliation(s)
- Allen Y. Hong
- Warren and Katharine Schlinger Laboratory for Chemistry and Chemical Engineering, Division of Chemistry and Chemical Engineering, California Institute of Technology, 1200 E. California Blvd, MC 101-20, Pasadena, CA 91125 (USA)
| | - Brian M. Stoltz
- Warren and Katharine Schlinger Laboratory for Chemistry and Chemical Engineering, Division of Chemistry and Chemical Engineering, California Institute of Technology, 1200 E. California Blvd, MC 101-20, Pasadena, CA 91125 (USA)
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20
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Hong AY, Stoltz BM. Biosynthese und chemische Synthese von Presilphiperfolanolen. Angew Chem Int Ed Engl 2014. [DOI: 10.1002/ange.201309494] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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21
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Bennett NB, Stoltz BM. A unified approach to the daucane and sphenolobane bicyclo[5.3.0]decane core: enantioselective total syntheses of daucene, daucenal, epoxydaucenal B, and 14-para-anisoyloxydauc-4,8-diene. Chemistry 2013; 19:17745-50. [PMID: 24302464 PMCID: PMC3927641 DOI: 10.1002/chem.201302353] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/19/2013] [Indexed: 11/07/2022]
Abstract
Access to the bicyclo[5.3.0]decane core found in the daucane and sphenolobane terpenoids via a key enone intermediate enables the enantioselective total syntheses of daucene, daucenal, epoxydaucenal B, and 14-para-anisoyloxydauc-4,8-diene. Central aspects include a catalytic asymmetric alkylation followed by a ring contraction and ring-closing metathesis to generate the five- and seven-membered rings, respectively.
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Affiliation(s)
- Nathan B. Bennett
- Division of Chemistry and Chemical Engineering, California Institute of Technology, Warren and Katharine Schlinger Laboratory for Chemistry and Chemical Engineering, 1200 E. California Blvd, MC 101-20, Pasadena, CA 91125 (USA), Fax: (+1) 626-395-8436
| | - Brian M. Stoltz
- Division of Chemistry and Chemical Engineering, California Institute of Technology, Warren and Katharine Schlinger Laboratory for Chemistry and Chemical Engineering, 1200 E. California Blvd, MC 101-20, Pasadena, CA 91125 (USA), Fax: (+1) 626-395-8436
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22
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Hong AY, Stoltz BM. The Construction of All-Carbon Quaternary Stereocenters by Use of Pd-Catalyzed Asymmetric Allylic Alkylation Reactions in Total Synthesis. European J Org Chem 2013; 2013:2745-2759. [PMID: 24944521 PMCID: PMC4059687 DOI: 10.1002/ejoc.201201761] [Citation(s) in RCA: 292] [Impact Index Per Article: 26.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/30/2012] [Indexed: 11/08/2022]
Abstract
All-carbon quaternary stereocenters have posed significant challenges in the synthesis of complex natural products. These important structural motifs have inspired the development of broadly applicable palladium-catalyzed asymmetric allylic alkylation reactions of unstabilized non-biased enolates for the synthesis of enantioenriched α-quaternary products. This microreview outlines key considerations in the application of palladium-catalyzed asymmetric allylic alkylation reactions and presents recent total syntheses of complex natural products that have employed these powerful transformations for the direct, catalytic, enantioselective construction of all-carbon quaternary stereocenters.
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Affiliation(s)
- Allen Y. Hong
- Warren and Katharine Schlinger Laboratory for Chemistry and Chemical Engineering, Division of Chemistry and Chemical Engineering, California Institute of Technology, 1200 E. California Blvd., MC 101-20, Pasadena, CA 91125, USA, Homepage: http://stoltz.caltech.edu
| | - Brian M. Stoltz
- Warren and Katharine Schlinger Laboratory for Chemistry and Chemical Engineering, Division of Chemistry and Chemical Engineering, California Institute of Technology, 1200 E. California Blvd., MC 101-20, Pasadena, CA 91125, USA, Homepage: http://stoltz.caltech.edu
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23
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Moustafa GAI, Kamada Y, Tanaka T, Yoshimitsu T. Stereoconvergent route to chiral cyclohexenone building blocks: formal synthesis of (-)-dysidiolide. Org Biomol Chem 2013; 10:8609-15. [PMID: 23042006 DOI: 10.1039/c2ob26532j] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A stereoconvergent access to chiral carbocyclic building blocks is reported. 6-(3'-Hydroxy-4'-methylpent-4'-enyl)-3-methoxy cyclohex-2-enone () that consists of four stereoisomers, i.e., racemic ca. 1 : 1 diastereomers, is converted to enantiomerically pure carbocycles through a combination of regioselective catalytic asymmetric reduction and alkylative remote stereoinduction. The present stereoconvergent strategy has allowed the formal synthesis of bioactive (-)-dysidiolide.
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Affiliation(s)
- Gamal A I Moustafa
- Graduate School of Pharmaceutical Sciences, Osaka University, 1-6 Yamadaoka, Suita, Osaka 565-0871, Japan
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24
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Bennett NB, Duquette DC, Kim J, Liu WB, Marziale AN, Behenna DC, Virgil SC, Stoltz BM. Expanding insight into asymmetric palladium-catalyzed allylic alkylation of N-heterocyclic molecules and cyclic ketones. Chemistry 2013; 19:4414-8. [PMID: 23447555 PMCID: PMC3815597 DOI: 10.1002/chem.201300030] [Citation(s) in RCA: 43] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/12/2012] [Indexed: 11/08/2022]
Abstract
Eeny, meeny, miny ... enaminones! Lactams and imides have been shown to consistently provide enantioselectivities substantially higher than other substrate classes previously investigated in the palladium-catalyzed asymmetric decarboxylative allylic alkylation. Several new substrates have been designed to probe the contributions of electronic, steric, and stereoelectronic factors that distinguish the lactam/imide series as superior alkylation substrates (see scheme). These studies culminated in marked improvements on carbocyclic allylic alkylation substrates.
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Affiliation(s)
| | | | - Jimin Kim
- Division of Chemistry and Chemical Engineering, California Institute of Technology, Warren and Katharine Schlinger Laboratory for Chemistry and Chemical Engineering, 1200 E. California Blvd, MC 101-20, Pasadena, CA 91125 (USA)
| | - Wen-Bo Liu
- Division of Chemistry and Chemical Engineering, California Institute of Technology, Warren and Katharine Schlinger Laboratory for Chemistry and Chemical Engineering, 1200 E. California Blvd, MC 101-20, Pasadena, CA 91125 (USA)
| | - Alexander N. Marziale
- Division of Chemistry and Chemical Engineering, California Institute of Technology, Warren and Katharine Schlinger Laboratory for Chemistry and Chemical Engineering, 1200 E. California Blvd, MC 101-20, Pasadena, CA 91125 (USA)
| | - Douglas C. Behenna
- Division of Chemistry and Chemical Engineering, California Institute of Technology, Warren and Katharine Schlinger Laboratory for Chemistry and Chemical Engineering, 1200 E. California Blvd, MC 101-20, Pasadena, CA 91125 (USA)
| | - Scott C. Virgil
- Division of Chemistry and Chemical Engineering, California Institute of Technology, Warren and Katharine Schlinger Laboratory for Chemistry and Chemical Engineering, 1200 E. California Blvd, MC 101-20, Pasadena, CA 91125 (USA)
| | - Brian M. Stoltz
- Division of Chemistry and Chemical Engineering, California Institute of Technology, Warren and Katharine Schlinger Laboratory for Chemistry and Chemical Engineering, 1200 E. California Blvd, MC 101-20, Pasadena, CA 91125 (USA)
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25
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Hong AY, Stoltz BM. Enantioselective total synthesis of the reported structures of (-)-9-epi-presilphiperfolan-1-ol and (-)-presilphiperfolan-1-ol: structural confirmation and reassignment and biosynthetic insights. Angew Chem Int Ed Engl 2012; 51:9674-8. [PMID: 22915502 PMCID: PMC3517068 DOI: 10.1002/anie.201205276] [Citation(s) in RCA: 38] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/04/2012] [Indexed: 11/10/2022]
Affiliation(s)
- Allen Y. Hong
- Warren and Katharine Schlinger Laboratory for Chemistry and Chemical Engineering Division of Chemistry and Chemical Engineering California Institute of Technology 1200 E. California Blvd, MC 101-20 Pasadena, CA 91125 (USA)
| | - Brian M. Stoltz
- Warren and Katharine Schlinger Laboratory for Chemistry and Chemical Engineering Division of Chemistry and Chemical Engineering California Institute of Technology 1200 E. California Blvd, MC 101-20 Pasadena, CA 91125 (USA)
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26
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Hong AY, Stoltz BM. Enantioselective Total Synthesis of the Reported Structures of (−)-9-epi-Presilphiperfolan-1-ol and (−)-Presilphiperfolan-1-ol: Structural Confirmation and Reassignment and Biosynthetic Insights. Angew Chem Int Ed Engl 2012. [DOI: 10.1002/ange.201205276] [Citation(s) in RCA: 17] [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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27
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Aikawa K, Okamoto T, Mikami K. Copper(I)-Catalyzed Asymmetric Desymmetrization: Synthesis of Five-Membered-Ring Compounds Containing All-Carbon Quaternary Stereocenters. J Am Chem Soc 2012; 134:10329-32. [DOI: 10.1021/ja3032345] [Citation(s) in RCA: 69] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Kohsuke Aikawa
- Department
of Applied Chemistry, Tokyo Institute of Technology, Tokyo 152-8552, Japan
| | - Tatsuya Okamoto
- Department
of Applied Chemistry, Tokyo Institute of Technology, Tokyo 152-8552, Japan
| | - Koichi Mikami
- Department
of Applied Chemistry, Tokyo Institute of Technology, Tokyo 152-8552, Japan
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