1
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Yin Z, Maczka M, Schnakenburg G, Schulz S, Dickschat JS. Enantioselective synthesis of all stereoisomers of geosmin and of biosynthetically related natural products. Org Biomol Chem 2024; 22:5748-5758. [PMID: 38920404 DOI: 10.1039/d4ob00934g] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/27/2024]
Abstract
Synthetic routes to geosmin and its enantiomer are well established, but the enantioselective synthesis of stereoisomers of geosmin is unknown. Here a stereoselective synthesis of all stereoisomers of geosmin is reported, yielding all compounds in high enantiomeric purity. Furthermore, the stereoselective synthesis of a geosmin derivative isolated from a mangrove associated streptomycete was performed, establishing the absolute configuration of the natural product. Finally, a new side product of the geosmin synthase from Streptomyces ambofaciens was isolated and its structure was elucidated by NMR spectroscopy. The absolute configuration of this new compound was determined through a stereoselective synthesis.
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Affiliation(s)
- Zhiyong Yin
- Kekulé-Institute for Organic Chemistry and Biochemistry, University of Bonn, Gerhard-Domagk-Strasse 1, 53121 Bonn, Germany.
| | - Michael Maczka
- Institute for Organic Chemistry, TU Braunschweig, Hagenring 30, 38106 Braunschweig, Germany
| | - Gregor Schnakenburg
- Institute for Inorganic Chemistry, University of Bonn, Gerhard-Domagk-Strasse 1, 53121 Bonn, Germany
| | - Stefan Schulz
- Institute for Organic Chemistry, TU Braunschweig, Hagenring 30, 38106 Braunschweig, Germany
| | - Jeroen S Dickschat
- Kekulé-Institute for Organic Chemistry and Biochemistry, University of Bonn, Gerhard-Domagk-Strasse 1, 53121 Bonn, Germany.
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2
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Kucharski MM, Watson AJB, Lloyd-Jones GC. Speciation and kinetics of fluoride transfer from tetra- n-butylammonium difluorotriphenylsilicate ('TBAT'). Chem Sci 2024; 15:4331-4340. [PMID: 38516098 PMCID: PMC10952091 DOI: 10.1039/d3sc05776c] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/29/2023] [Accepted: 12/06/2023] [Indexed: 03/23/2024] Open
Abstract
Tetra-n-butylammonium difluorotriphenylsilicate (TBAT) is a conveniently handled anhydrous fluoride source, commonly used as a surrogate for tetra-n-butylammonium fluoride (TBAF). While prior studies indicate that TBAT reacts rapidly with fluoride acceptors, little is known about the mechanism(s) of fluoride transfer. We report on the interrogation of the kinetics of three processes in which fluoride is transferred from TBAT, in THF and in MeCN, using a variety of NMR methods, including chemical exchange saturation transfer, magnetisation transfer, diffusion analysis, and 1D NOESY. These studies reveal ion-pairing between the tetra-n-butylammonium and difluorotriphenylsilicate moieties, and a very low but detectable degree of fluoride dissociation, which then undergoes further equilibria and/or induces decomposition, depending on the conditions. Degenerate exchange between TBAT and fluorotriphenylsilane (FTPS) is very rapid in THF, inherently increases in rate over time, and is profoundly sensitive to the presence of water. Addition of 2,6-di-tert-butylpyridine and 3 Å molecular sieves stabilises the exchange rate, and both dissociative and direct fluoride transfer are shown to proceed in parallel under these conditions. Degenerate exchange between TBAT and 2-naphthalenyl fluorosulfate (ARSF) is not detected at the NMR timescale in THF, and is slow in MeCN. For the latter, the exchange is near-fully inhibited by exogenous FTPS, indicating a predominantly dissociative character to this exchange process. Fluorination of benzyl bromide (BzBr) with TBAT in MeCN-d3 exhibits moderate progressive autoinhibition, and the initial rate of the reaction is supressed by the presence of exogenous FTPS. Overall, TBAT can act as a genuine surrogate for TBAF, as well as a reservoir for rapidly-reversible release of traces of it, with the relative contribution of the pathways depending, inter alia, on the identity of the fluoride acceptor, the solvent, and the concentration of endogenous or exogenous FTPS.
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Affiliation(s)
- Maciej M Kucharski
- School of Chemistry, University of Edinburgh David Brewster Road Edinburgh EH9 3FJ UK
| | - Allan J B Watson
- School of Chemistry, University of St Andrews North Haugh, St Andrews KY16 9ST UK
| | - Guy C Lloyd-Jones
- School of Chemistry, University of Edinburgh David Brewster Road Edinburgh EH9 3FJ UK
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3
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Moser D, Schmidt TA, Sparr C. Diastereodivergent Catalysis. JACS AU 2023; 3:2612-2630. [PMID: 37885579 PMCID: PMC10598570 DOI: 10.1021/jacsau.3c00216] [Citation(s) in RCA: 6] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 05/02/2023] [Revised: 09/01/2023] [Accepted: 09/06/2023] [Indexed: 10/28/2023]
Abstract
Alongside enantioselective catalysis, synthetic chemists are often confronted by the challenge of achieving catalyst control over the relative configuration to stereodivergently access desired diastereomers. Typically, these approaches iteratively or simultaneously control multiple stereogenic units for which dual catalytic methods comprising sequential, relay, and synergistic catalysis emerged as particularly efficient strategies. In this Perspective, the benefits and challenges of catalyst-controlled diastereodivergence in the construction of carbon stereocenters are discussed on the basis of illustrative examples. The concepts are then transferred to diastereodivergent catalysis for atropisomeric systems with twofold and higher-order stereogenicity as well as diastereodivergent catalyst control over E- and Z-configured alkenes.
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Affiliation(s)
| | | | - Christof Sparr
- Department of Chemistry, University
of Basel, St. Johanns-Ring 19, 4056 Basel, Switzerland
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4
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Stout CN, Wasfy NM, Chen F, Renata H. Charting the Evolution of Chemoenzymatic Strategies in the Syntheses of Complex Natural Products. J Am Chem Soc 2023; 145:18161-18181. [PMID: 37553092 PMCID: PMC11107883 DOI: 10.1021/jacs.3c03422] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 08/10/2023]
Abstract
Bolstered by recent advances in bioinformatics, genetics, and enzyme engineering, the field of chemoenzymatic synthesis has enjoyed a rapid increase in popularity and utility. This Perspective explores the integration of enzymes into multistep chemical syntheses, highlighting the unique potential of biocatalytic transformations to streamline the synthesis of complex natural products. In particular, we identify four primary conceptual approaches to chemoenzymatic synthesis and illustrate each with a number of landmark case studies. Future opportunities and challenges are also discussed.
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Affiliation(s)
- Carter N. Stout
- Skaggs Doctoral Program in the Chemical and Biological Sciences, Scripps Research, La Jolla, CA 92037, USA
| | - Nour M. Wasfy
- Department of Chemistry, BioScience Research Collaborative, Rice University, Houston, Texas, 77005, United States
| | - Fang Chen
- Department of Chemistry, BioScience Research Collaborative, Rice University, Houston, Texas, 77005, United States
| | - Hans Renata
- Department of Chemistry, BioScience Research Collaborative, Rice University, Houston, Texas, 77005, United States
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5
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Greßies S, Süße L, Casselman T, Stoltz BM. Tandem Dearomatization/Enantioselective Allylic Alkylation of Pyridines. J Am Chem Soc 2023; 145:11907-11913. [PMID: 37212659 PMCID: PMC10251512 DOI: 10.1021/jacs.3c02470] [Citation(s) in RCA: 8] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/11/2023] [Indexed: 05/23/2023]
Abstract
Herein, we report a multistep one-pot reaction of substituted pyridines leading to N-protected tetrahydropyridines with outstanding enantioselectivity (up to 97% ee). An iridium(I)-catalyzed dearomative 1,2-hydrosilylation of pyridines enables the use of N-silyl enamines as a new type of nucleophile in a subsequent palladium-catalyzed asymmetric allylic alkylation. This telescoped process overcomes the intrinsic nucleophilic selectivity of pyridines to synthesize enantioenriched, C-3-substituted tetrahydropyridine products that have been otherwise challenging to access.
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Affiliation(s)
- Steffen Greßies
- 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
| | - Lars Süße
- 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
| | - Tyler Casselman
- 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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6
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Zhu CL, Yao Y, Lu CD. Stereocontrolled α-Allylation of α-Branched N- tert-Butanesulfinyl Ketimines via a Michael-Wittig Cascade for the Construction of Acyclic Quaternary Stereocenters. Org Lett 2022; 24:8925-8929. [PMID: 36445047 DOI: 10.1021/acs.orglett.2c03801] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/03/2022]
Abstract
A single-flask cascade of Michael addition and Wittig olefination was developed to allow the stereoselective α-allylic alkylation of α-branched N-tert-butanesulfinyl ketimines for the construction of acyclic quaternary stereocenters bearing two sterically and electronically similar substituents. In this process, tBuOK-promoted stereoselective α-deprotonation gives fully substituted aza-enolates with a stereodefined geometry, Michael addition with α,β-unsaturated phosphonates generates C-C bonds with exceptional stereocontrol, and finally paraformaldehyde trapping of the conjugate addition intermediate generates functionalized α-allylated imines.
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Affiliation(s)
- Chong-Lin Zhu
- School of Chemical Science and Technology, Yunnan University, Kunming, Yunnan 650091, China
- Southwest United Graduate School, Kunming, Yunnan 650092, China
| | - Yun Yao
- School of Chemical Science and Technology, Yunnan University, Kunming, Yunnan 650091, China
| | - Chong-Dao Lu
- School of Chemical Science and Technology, Yunnan University, Kunming, Yunnan 650091, China
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7
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Jin S, Zhao X, Ma D. Divergent Total Syntheses of Napelline-Type C20-Diterpenoid Alkaloids: (-)-Napelline, (+)-Dehydronapelline, (-)-Songorine, (-)-Songoramine, (-)-Acoapetaldine D, and (-)-Liangshanone. J Am Chem Soc 2022; 144:15355-15362. [PMID: 35948501 DOI: 10.1021/jacs.2c06738] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
The napelline-type alkaloids possess an azabicyclo[3.2.1]octane moiety and an ent-kaurane-type tetracyclic skeleton (6/6/6/5) along with varied oxidation patterns embedded in the compact hexacyclic framework. Herein, we disclose a divergent entry to napelline-type alkaloids that hinges on convergent assembly of the ent-kaurane core using a diastereoselective intermolecular Cu-mediated conjugate addition and subsequent intramolecular Michael addition reaction as well as rapid construction of the azabicyclo[3.2.1]octane motif via an intramolecular Mannich cyclization. The power of this strategy has been demonstrated through efficient asymmetric total syntheses of eight napelline-type alkaloids, including (-)-napelline, (-)-12-epi-napelline, (+)-dehydronapelline, (+)-12-epi-dehydronapelline, (-)-songorine, (-)-songoramine, (-)-acoapetaldine D, and (-)-liangshanone.
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Affiliation(s)
- Shicheng Jin
- State Key Laboratory of Bioorganic & Natural Products Chemistry, Center for Excellence in Molecular Synthesis, Shanghai Institute of Organic Chemistry, University of Chinese Academy of Sciences, Chinese Academy of Sciences, 345 Lingling Lu, Shanghai 200032, China
| | - Xiangbo Zhao
- State Key Laboratory of Bioorganic & Natural Products Chemistry, Center for Excellence in Molecular Synthesis, Shanghai Institute of Organic Chemistry, University of Chinese Academy of Sciences, Chinese Academy of Sciences, 345 Lingling Lu, Shanghai 200032, China
| | - Dawei Ma
- State Key Laboratory of Bioorganic & Natural Products Chemistry, Center for Excellence in Molecular Synthesis, Shanghai Institute of Organic Chemistry, University of Chinese Academy of Sciences, Chinese Academy of Sciences, 345 Lingling Lu, Shanghai 200032, China
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8
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Mando M, Fares M, Kowandy C, Grellepois F, Riguet E. Organocatalyzed Asymmetric Allylic Alkylation Enables Synthesis of Chiral γ-Lactones Bearing Vicinal Tertiary and Quaternary Stereocenters. Org Lett 2022; 24:5351-5355. [PMID: 35856866 DOI: 10.1021/acs.orglett.2c02001] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
The synthesis of enantioenriched α-aryl-α'-allyl-γ-butyrolactones bearing vicinal tertiary and quaternary stereocenters through organocatalyzed asymmetric allylic alkylation is reported. The process demonstrated that weakly stabilized enolates derived from α-aryl-γ-butyrolactones can undergo regio-, diastereo-, and enantioselective allylation using the proper activation of Morita-Baylis-Hillman (MBH) carbonates.
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Affiliation(s)
- Morgane Mando
- Université de Reims Champagne-Ardenne, CNRS, Institut de Chimie Moléculaire de Reims, UMR 7312, 51097 Reims, France
| | - Mathieu Fares
- Université de Reims Champagne-Ardenne, CNRS, Institut de Chimie Moléculaire de Reims, UMR 7312, 51097 Reims, France
| | - Christelle Kowandy
- Université de Reims Champagne-Ardenne, CNRS, Institut de Chimie Moléculaire de Reims, UMR 7312, 51097 Reims, France
| | - Fabienne Grellepois
- Université de Reims Champagne-Ardenne, CNRS, Institut de Chimie Moléculaire de Reims, UMR 7312, 51097 Reims, France
| | - Emmanuel Riguet
- Université de Reims Champagne-Ardenne, CNRS, Institut de Chimie Moléculaire de Reims, UMR 7312, 51097 Reims, France
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9
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Xiao J, Zhou G, Ji C. Syntheses of Mersicarpine, a Monoterpenoid Indole Alkaloid with an Atypical Tetracyclic Structure. ChemistrySelect 2022. [DOI: 10.1002/slct.202201373] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Jie Xiao
- School of Chemistry and Environmental Sciences Shangrao Normal University No. 401 Zhimin Road Shangrao Jiangxi 334001 People's Republic of China
| | - Guang‐Hua Zhou
- School of Chemistry and Food Science Nanchang Normal University No. 889 Ruixiang Road Nanchang Jiangxi 330032 People's Republic of China
| | - Cong‐Bin Ji
- School of Chemistry and Environmental Sciences Shangrao Normal University No. 401 Zhimin Road Shangrao Jiangxi 334001 People's Republic of China
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10
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Nugent J, Sterling AJ, Frank N, Mousseau JJ, Anderson EA. Synthesis of α-Quaternary Bicyclo[1.1.1]pentanes through Synergistic Organophotoredox and Hydrogen Atom Transfer Catalysis. Org Lett 2021; 23:8628-8633. [PMID: 34699248 DOI: 10.1021/acs.orglett.1c03346] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Abstract
Bicyclo[1.1.1]pentanes (BCPs) are important in drug design as sp3-rich bioisosteres of arenes and tert-butyl groups; however, the preparation of BCPs with adjacent quaternary carbons is barely known. We report a facile synthesis of α-quaternary BCPs using organophotoredox and hydrogen atom transfer catalysis in which α-keto radicals, generated through oxidation of β-ketocarbonyls, undergo efficient addition to [1.1.1]propellane. The BCP products can be transformed into a variety of useful derivatives, including enantioenriched BCPs featuring α-quaternary stereocenters.
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Affiliation(s)
- Jeremy Nugent
- Chemistry Research Laboratory, University of Oxford, 12 Mansfield Road, Oxford OX1 3TA, United Kingdom
| | - Alistair J Sterling
- Chemistry Research Laboratory, University of Oxford, 12 Mansfield Road, Oxford OX1 3TA, United Kingdom
| | - Nils Frank
- Chemistry Research Laboratory, University of Oxford, 12 Mansfield Road, Oxford OX1 3TA, United Kingdom
| | - James J Mousseau
- Pfizer Worldwide Research and Development, Eastern Point Road, Groton, Connecticut 06340, United States
| | - Edward A Anderson
- Chemistry Research Laboratory, University of Oxford, 12 Mansfield Road, Oxford OX1 3TA, United Kingdom
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11
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Evolution in heterodonor P-N, P-S and P-O chiral ligands for preparing efficient catalysts for asymmetric catalysis. From design to applications. Coord Chem Rev 2021. [DOI: 10.1016/j.ccr.2021.214120] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
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12
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Jang DJ, Lee S, Lee J, Moon D, Rhee YH. Palladium-Catalyzed Asymmetric Decarboxylative Addition of β-Keto Acids to Heteroatom-Substituted Allenes. Angew Chem Int Ed Engl 2021; 60:22166-22171. [PMID: 34278680 DOI: 10.1002/anie.202107990] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/15/2021] [Indexed: 11/06/2022]
Abstract
The Pd-catalyzed asymmetric addition reaction of β-keto acids to heteroatom-substituted allene is reported. This reaction generates β-substituted ketones in an asymmetric manner through a branch-selective decarboxylative allylation pathway. The reaction accommodates various alkoxyallenes as well as amidoallenes.
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Affiliation(s)
- Dong-Jin Jang
- Department of Chemistry, Pohang University of Science and Technology, Cheongam-ro 77, Nam-gu, Pohang, Gyeongbuk, 37673, Republic of Korea
| | - Sukhyun Lee
- Department of Chemistry, Pohang University of Science and Technology, Cheongam-ro 77, Nam-gu, Pohang, Gyeongbuk, 37673, Republic of Korea
| | - Juyeol Lee
- Department of Chemistry, Pohang University of Science and Technology, Cheongam-ro 77, Nam-gu, Pohang, Gyeongbuk, 37673, Republic of Korea
| | - Dohyun Moon
- Beamline Department, Pohang Accelerator Laboratory, 80 Jigokro-127-beongil, Nam-gu, Pohang, Gyeongbuk, 37673, Republic of Korea
| | - Young Ho Rhee
- Department of Chemistry, Pohang University of Science and Technology, Cheongam-ro 77, Nam-gu, Pohang, Gyeongbuk, 37673, Republic of Korea
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13
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Xia JT, Li L, Hu XP. Copper-Catalyzed Decarboxylative Propargylic Alkylation of Enol Carbonates: Stereoselective Synthesis of Quaternary α-Amino Acids. ACS Catal 2021. [DOI: 10.1021/acscatal.1c03421] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Affiliation(s)
- Jin-Tao Xia
- Dalian Institute of Chemical Physics, Chinese Academy of Sciences, 457 Zhongshan Road, Dalian 116023, China
- University of Chinese Academy of Sciences, Beijing 100049, China
| | - Ling Li
- Dalian Institute of Chemical Physics, Chinese Academy of Sciences, 457 Zhongshan Road, Dalian 116023, China
- University of Chinese Academy of Sciences, Beijing 100049, China
| | - Xiang-Ping Hu
- Dalian Institute of Chemical Physics, Chinese Academy of Sciences, 457 Zhongshan Road, Dalian 116023, China
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14
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Jang D, Lee S, Lee J, Moon D, Rhee YH. Palladium‐Catalyzed Asymmetric Decarboxylative Addition of β‐Keto Acids to Heteroatom‐Substituted Allenes. Angew Chem Int Ed Engl 2021. [DOI: 10.1002/ange.202107990] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Affiliation(s)
- Dong‐Jin Jang
- Department of Chemistry Pohang University of Science and Technology Cheongam-ro 77, Nam-gu Pohang Gyeongbuk 37673 Republic of Korea
| | - Sukhyun Lee
- Department of Chemistry Pohang University of Science and Technology Cheongam-ro 77, Nam-gu Pohang Gyeongbuk 37673 Republic of Korea
| | - Juyeol Lee
- Department of Chemistry Pohang University of Science and Technology Cheongam-ro 77, Nam-gu Pohang Gyeongbuk 37673 Republic of Korea
| | - Dohyun Moon
- Beamline Department Pohang Accelerator Laboratory 80 Jigokro-127-beongil, Nam-gu Pohang Gyeongbuk 37673 Republic of Korea
| | - Young Ho Rhee
- Department of Chemistry Pohang University of Science and Technology Cheongam-ro 77, Nam-gu Pohang Gyeongbuk 37673 Republic of Korea
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15
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Anthony S, Wonilowicz LG, McVeigh MS, Garg NK. Leveraging Fleeting Strained Intermediates to Access Complex Scaffolds. JACS AU 2021; 1:897-912. [PMID: 34337603 PMCID: PMC8317162 DOI: 10.1021/jacsau.1c00214] [Citation(s) in RCA: 35] [Impact Index Per Article: 11.7] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/14/2021] [Indexed: 05/07/2023]
Abstract
Arynes, strained cyclic alkynes, and strained cyclic allenes were validated as plausible intermediates in the 1950s and 1960s. Despite initially being considered mere scientific curiosities, these transient and highly reactive species have now become valuable synthetic building blocks. This Perspective highlights recent advances in the field that have allowed access to structural and stereochemical complexity, including recent breakthroughs in asymmetric catalysis.
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16
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Masson-Makdissi J, Prieto L, Abel-Snape X, Lautens M. Enantio- and Diastereodivergent Sequential Catalysis Featuring Two Transition-Metal-Catalyzed Asymmetric Reactions. Angew Chem Int Ed Engl 2021; 60:16932-16936. [PMID: 34046992 DOI: 10.1002/anie.202105800] [Citation(s) in RCA: 27] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/28/2021] [Indexed: 11/10/2022]
Abstract
This study demonstrates the feasibility and inherent benefits of combining two distinct asymmetric transition-metal-catalyzed reactions in one pot. The reported transformation features a Pd-catalyzed asymmetric allylic alkylation and a Rh-catalyzed enantioselective 1,4-conjugate addition, effectively converting simple allyl enol carbonate precursors into enantioenriched cyclic ketones with two remote stereocenters. Despite the anticipated challenges associated with controlling stereoselectivity in such a complex system, the products are obtained in enantiomeric excesses ranging up to >99 % ee, exceeding those obtained from either of the individual asymmetric reactions. In addition, since the stereoselectivity of both steps is under catalyst control, this one-pot reaction is enantio- and diastereodivergent, enabling facile access to all stereoisomers from the same set of starting materials.
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Affiliation(s)
- Jeanne Masson-Makdissi
- Department of Chemistry, University of Toronto, 80 St. George Street., Toronto, Ontario, M5S 3H6, Canada
| | - Liher Prieto
- Department of Chemistry, University of Toronto, 80 St. George Street., Toronto, Ontario, M5S 3H6, Canada.,Department of Organic and Inorganic Chemistry, University of the Basque Country (UPV/EHU), P.O. Box 644, 48080, Bilbao, Spain
| | - Xavier Abel-Snape
- Department of Chemistry, University of Toronto, 80 St. George Street., Toronto, Ontario, M5S 3H6, Canada
| | - Mark Lautens
- Department of Chemistry, University of Toronto, 80 St. George Street., Toronto, Ontario, M5S 3H6, Canada
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17
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Masson‐Makdissi J, Prieto L, Abel‐Snape X, Lautens M. Enantio‐ and Diastereodivergent Sequential Catalysis Featuring Two Transition‐Metal‐Catalyzed Asymmetric Reactions. Angew Chem Int Ed Engl 2021. [DOI: 10.1002/ange.202105800] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Affiliation(s)
- Jeanne Masson‐Makdissi
- Department of Chemistry University of Toronto 80 St. George Street. Toronto Ontario M5S 3H6 Canada
| | - Liher Prieto
- Department of Chemistry University of Toronto 80 St. George Street. Toronto Ontario M5S 3H6 Canada
- Department of Organic and Inorganic Chemistry University of the Basque Country (UPV/EHU) P.O. Box 644 48080 Bilbao Spain
| | - Xavier Abel‐Snape
- Department of Chemistry University of Toronto 80 St. George Street. Toronto Ontario M5S 3H6 Canada
| | - Mark Lautens
- Department of Chemistry University of Toronto 80 St. George Street. Toronto Ontario M5S 3H6 Canada
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18
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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: 219] [Impact Index Per Article: 73.0] [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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19
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Wu X, Nie W, Fu M, Liu XY, Xue F, Qin Y. Synthetic studies towards arcutinidine: An alternative strategy for construction of the complete carbon framework. Tetrahedron 2021. [DOI: 10.1016/j.tet.2021.132092] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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20
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Li C, Ragab SS, Liu G, Tang W. Enantioselective formation of quaternary carbon stereocenters in natural product synthesis: a recent update. Nat Prod Rep 2021; 37:276-292. [PMID: 31515549 DOI: 10.1039/c9np00039a] [Citation(s) in RCA: 108] [Impact Index Per Article: 36.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
Covering: 2013-2018 Natural products bearing quaternary carbon stereocenters have attracted tremendous interest from the synthetic community due to their diverse biological activities and fascinating molecular architectures. However, the construction of these molecules in an enantioselective fashion remains a long-standing challenge because of the lack of efficient asymmetric catalytic methods for installing these motifs. The rapid progress in the development of new-generation efficient chiral catalysts has opened the door for several asymmetric reactions, such as Michael addition, dearomative cyclization, polyene cyclization, α-arylation, cycloaddition, allylation, for the construction of quaternary carbon stereocenters in a highly enantioselective fashion. These asymmetric catalytic methods have greatly facilitated the synthesis of complex natural products with improved output and overall efficiency. In this concise review, we highlight the progress in the last six years in complex natural product synthesis, in which at least one quaternary carbon stereocenter has been constructed via asymmetric catalytic technologies, with particular emphasis on the analysis of the stereochemical model of each enantioselective transformation.
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Affiliation(s)
- Chengxi Li
- State Key Laboratory of Bio-Organic and Natural Products Chemistry, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, 345 Ling Ling Road, Shanghai 200032, China.
| | - Sherif Shaban Ragab
- State Key Laboratory of Bio-Organic and Natural Products Chemistry, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, 345 Ling Ling Road, Shanghai 200032, China. and Photochemistry Department, Chemical Industries Research Division, National Research Centre, Dokki, 12622, Giza, Egypt
| | - Guodu Liu
- State Key Laboratory of Bio-Organic and Natural Products Chemistry, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, 345 Ling Ling Road, Shanghai 200032, China. and Department of Chemistry and Chemical Engineering, Inner Mongolia University, Hohhot 010021, China.
| | - Wenjun Tang
- State Key Laboratory of Bio-Organic and Natural Products Chemistry, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, 345 Ling Ling Road, Shanghai 200032, China.
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21
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Zhang H, He H, Gao S. Asymmetric Total Synthesis of Cephanolide A. Angew Chem Int Ed Engl 2020; 59:20417-20422. [PMID: 32749749 DOI: 10.1002/anie.202009562] [Citation(s) in RCA: 26] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/10/2020] [Indexed: 12/16/2022]
Abstract
The first asymmetric total synthesis of cephanolide A, a complex hexacyclic C18 dinorditerpenoid from cephalotaxus sinensis, was achieved. The synthesis features a convergent strategy, which provides a flexible approach to prepare the biogenetically cephalotaxus diterpenoids and structurally related derivatives for biological studies. A mild intramolecular Prins cyclization was developed to construct the central hexahydrofluorenol skeleton (A-B-C ring), which relies on the originally proposed hydroacylation strategy. A remote hydroxy group directed hydrogenation was applied to stereospecifically reduce the tetra-substituted enone unit. A sequence of ring forming steps, including lactonization, cation mediated etherification and Friedel-Crafts cyclization, was efficiently utilized to forge the cage-like skeleton.
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Affiliation(s)
- Hongyuan Zhang
- Shanghai Key Laboratory of Green Chemistry and Chemical Processes, School of Chemistry and Molecular Engineering, East China Normal University, 3663 North Zhongshan Road, Shanghai, 200062, China
| | - Haibing He
- Shanghai Engineering Research Center of Molecular Therapeutics and New Drug Development, East China Normal University, 3663 North Zhongshan Road, Shanghai, 200062, China
| | - Shuanhu Gao
- Shanghai Key Laboratory of Green Chemistry and Chemical Processes, School of Chemistry and Molecular Engineering, East China Normal University, 3663 North Zhongshan Road, Shanghai, 200062, China
- Shanghai Engineering Research Center of Molecular Therapeutics and New Drug Development, East China Normal University, 3663 North Zhongshan Road, Shanghai, 200062, China
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22
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23
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Ngamnithiporn A, Iwayama T, Bartberger MD, Stoltz BM. Enantioselective synthesis of highly oxygenated acyclic quaternary center-containing building blocks via palladium-catalyzed decarboxylative allylic alkylation of cyclic siloxyketones. Chem Sci 2020; 11:11068-11071. [PMID: 34123197 PMCID: PMC8162308 DOI: 10.1039/d0sc04383d] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/09/2020] [Accepted: 09/10/2020] [Indexed: 11/30/2022] Open
Abstract
The development of a palladium-catalyzed enantioselective decarboxylative allylic alkylation of cyclic siloxyketones to produce enantioenriched silicon-tethered heterocycles is reported. The reaction proceeds smoothly to provide products bearing a quaternary stereocenter in excellent yields (up to 91% yield) with high levels of enantioselectivity (up to 94% ee). We further utilized the unique reactivity of the siloxy functionality to access chiral, highly oxygenated acyclic quaternary building blocks. In addition, we subsequently demonstrated the utility of these compounds through the synthesis of a lactone bearing vicinal quaternary-trisubstituted stereocenters.
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Affiliation(s)
- Aurapat Ngamnithiporn
- Warren and Katharine Schlinger Laboratory for Chemistry and Chemical Engineering, Division of Chemistry and Chemical Engineering, California Institute of Technology Pasadena CA 91125 USA
| | - Toshihiko Iwayama
- Warren and Katharine Schlinger Laboratory for Chemistry and Chemical Engineering, Division of Chemistry and Chemical Engineering, California Institute of Technology Pasadena CA 91125 USA
- Central Pharmaceutical Research Institute, Japan Tobacco Inc. 1-1, Murasaki-cho, Takatsuki Osaka 569-1125 Japan
| | | | - Brian M Stoltz
- Warren and Katharine Schlinger Laboratory for Chemistry and Chemical Engineering, Division of Chemistry and Chemical Engineering, California Institute of Technology Pasadena CA 91125 USA
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24
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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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25
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Cusumano AQ, Stoltz BM, Goddard WA. Reaction Mechanism, Origins of Enantioselectivity, and Reactivity Trends in Asymmetric Allylic Alkylation: A Comprehensive Quantum Mechanics Investigation of a C(sp 3)-C(sp 3) Cross-Coupling. J Am Chem Soc 2020; 142:13917-13933. [PMID: 32640162 PMCID: PMC7802888 DOI: 10.1021/jacs.0c06243] [Citation(s) in RCA: 27] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
We utilize quantum mechanics to evaluate a variety of plausible mechanistic pathways for the entirety of the catalytic cycle for asymmetric decarboxylative allylic alkylation of allyl β-ketoesters. We present a mechanistic picture that unites all current experimental observations, including enantioinduction, reaction rate, catalyst resting state, enolate crossover experiments, water tolerance, and the effects of solvation on inner- and outer-sphere mechanisms. Experiments designed to evaluate the fidelity and predictive power of the computational models reveal the methods employed herein to be highly effective in elucidating the reactivity of the catalytic system. On the basis of these findings, we highlight a computational framework from which chemically accurate results are obtained and address the current limitations of the decarboxylative asymmetric allylic alkylation reaction.
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Affiliation(s)
- Alexander Q Cusumano
- The 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
- The 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
| | - William A Goddard
- Materials and Process Simulation Center, Beckman Institute, California Institute of Technology, Pasadena, California 91125, United States
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26
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Inanaga K, Wollenburg M, Bachman S, Hafeman NJ, Stoltz BM. Catalytic enantioselective synthesis of carbocyclic and heterocyclic spiranes via a decarboxylative aldol cyclization. Chem Sci 2020; 11:7390-7395. [PMID: 33133488 PMCID: PMC7574022 DOI: 10.1039/d0sc02366c] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/26/2020] [Accepted: 06/20/2020] [Indexed: 11/21/2022] Open
Abstract
The synthesis of a variety of enantioenriched 1,3-diketospiranes from the corresponding racemic allyl β-ketoesters via an interrupted asymmetric allylic alkylation is disclosed. Substrates possessing pendant aldehydes undergo decarboxylative enolate formation in the presence of a chiral Pd catalyst and subsequently participate in an enantio- and diastereoselective, intramolecular aldol reaction to furnish spirocyclic β-hydroxy ketones which may be oxidized to the corresponding enantioenriched diketospiranes. Additionally, this chemistry has been extended to α-allylcarboxy lactam substrates leading to a formal synthesis of the natural product (-)-isonitramine.
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Affiliation(s)
- Kazato Inanaga
- Warren and Katharine Schlinger Laboratory for Chemistry and Chemical Engineering , California Institute of Technology , 1200 E. California Blvd. , Pasadena , CA 91125 , USA .
| | - Marco Wollenburg
- Warren and Katharine Schlinger Laboratory for Chemistry and Chemical Engineering , California Institute of Technology , 1200 E. California Blvd. , Pasadena , CA 91125 , USA .
| | - Shoshana Bachman
- Warren and Katharine Schlinger Laboratory for Chemistry and Chemical Engineering , California Institute of Technology , 1200 E. California Blvd. , Pasadena , CA 91125 , USA .
| | - Nicholas J Hafeman
- Warren and Katharine Schlinger Laboratory for Chemistry and Chemical Engineering , California Institute of Technology , 1200 E. California Blvd. , Pasadena , CA 91125 , USA .
| | - Brian M Stoltz
- Warren and Katharine Schlinger Laboratory for Chemistry and Chemical Engineering , California Institute of Technology , 1200 E. California Blvd. , Pasadena , CA 91125 , USA .
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27
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O’Broin CQ, Guiry PJ. Advances in Decarboxylative Palladium-Catalyzed Reactions of Propargyl Electrophiles. J Org Chem 2020; 85:10321-10333. [DOI: 10.1021/acs.joc.0c01218] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
Affiliation(s)
- Calvin Q. O’Broin
- 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
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28
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Arthurs RA, Hughes DL, Richards CJ. Planar chiral palladacycle precatalysts for asymmetric synthesis. Org Biomol Chem 2020; 18:5466-5472. [PMID: 32643748 DOI: 10.1039/d0ob01331e] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
Chiral non-racemic palladacycles were employed as precatalysts for Pd(0) mediated asymmetric synthesis. Addition of HPAr2/base to a ferrocenyloxazoline planar chiral palladacycle resulted in ligand synthesis and palladium capture to give a bidentate Phosferrox/Pd(0) complex. A series of these complexes were generated in situ and applied successfully as catalysts for asymmetric allylic alkylation.
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Affiliation(s)
- Ross A Arthurs
- School of Chemistry, University of East Anglia, Norwich Research Park, Norwich, NR4 7TU, UK.
| | - David L Hughes
- School of Chemistry, University of East Anglia, Norwich Research Park, Norwich, NR4 7TU, UK.
| | - Christopher J Richards
- School of Chemistry, University of East Anglia, Norwich Research Park, Norwich, NR4 7TU, UK.
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29
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Cao MY, Ma BJ, Lao ZQ, Wang H, Wang J, Liu J, Xing K, Huang YH, Gan KJ, Gao W, Wang H, Hong X, Lu HH. Optically Active Flavaglines-Inspired Molecules by a Palladium-Catalyzed Decarboxylative Dearomative Asymmetric Allylic Alkylation. J Am Chem Soc 2020; 142:12039-12045. [PMID: 32584568 DOI: 10.1021/jacs.0c05113] [Citation(s) in RCA: 18] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
Abstract
With the aid of a class of newly discovered Trost-type bisphosphine ligands bearing a chiral cycloalkane framework, the Pd-catalyzed decarboxylative dearomative asymmetric allylic alkylation (AAA) of benzofurans was achieved with high efficiency [0.2-1.0 mol% Pd2(dba)3/L], good generality, and high enantioselectivity (>30 examples, 82-99% yield and 90-96% ee). Moreover, a diversity-oriented synthesis (DOS) of previously unreachable flavaglines is disclosed. It features a reliable and scalable sequence of the freshly developed Tsuji-Trost-Stoltz AAA, a Wacker-Grubbs-Stoltz oxidation, an intra-benzoin condensation, and a conjugate addition, which allows the efficient construction of the challenging and compact cyclopenta[b]benzofuran scaffold with contiguous stereocenters. This strategy offers a new avenue for developing flavagline-based drugs.
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Affiliation(s)
- Meng-Yue Cao
- Key Laboratory of Precise Synthesis of Functional Molecules of Zhejiang Province, School of Science, Westlake University, 18 Shilongshan Road, Hangzhou 310024, China.,Institute of Natural Sciences, Westlake Institute for Advanced Study, Hangzhou 310024, China.,Department of Chemistry, Zhejiang University, 866 Yuhangtang Road, Hangzhou 310058, China
| | - Bin-Jie Ma
- Key Laboratory of Precise Synthesis of Functional Molecules of Zhejiang Province, School of Science, Westlake University, 18 Shilongshan Road, Hangzhou 310024, China.,Institute of Natural Sciences, Westlake Institute for Advanced Study, Hangzhou 310024, China
| | - Zhi-Qi Lao
- Key Laboratory of Precise Synthesis of Functional Molecules of Zhejiang Province, School of Science, Westlake University, 18 Shilongshan Road, Hangzhou 310024, China.,Institute of Natural Sciences, Westlake Institute for Advanced Study, Hangzhou 310024, China
| | - Hongliang Wang
- Department of Chemistry, Zhejiang University, 866 Yuhangtang Road, Hangzhou 310058, China
| | - Jing Wang
- Key Laboratory of Precise Synthesis of Functional Molecules of Zhejiang Province, School of Science, Westlake University, 18 Shilongshan Road, Hangzhou 310024, China.,Institute of Natural Sciences, Westlake Institute for Advanced Study, Hangzhou 310024, China
| | - Juan Liu
- Institute of Advanced Synthesis (IAS), Nanjing Tech University, 30 South Puzhu Road, Nanjing 211816, China
| | - Kuan Xing
- Key Laboratory of Precise Synthesis of Functional Molecules of Zhejiang Province, School of Science, Westlake University, 18 Shilongshan Road, Hangzhou 310024, China.,Institute of Natural Sciences, Westlake Institute for Advanced Study, Hangzhou 310024, China
| | - Yu-Hao Huang
- Key Laboratory of Precise Synthesis of Functional Molecules of Zhejiang Province, School of Science, Westlake University, 18 Shilongshan Road, Hangzhou 310024, China.,Institute of Natural Sciences, Westlake Institute for Advanced Study, Hangzhou 310024, China
| | - Kang-Ji Gan
- Key Laboratory of Precise Synthesis of Functional Molecules of Zhejiang Province, School of Science, Westlake University, 18 Shilongshan Road, Hangzhou 310024, China.,Institute of Natural Sciences, Westlake Institute for Advanced Study, Hangzhou 310024, China.,Department of Chemistry, Zhejiang University, 866 Yuhangtang Road, Hangzhou 310058, China
| | - Wei Gao
- Institute of Advanced Synthesis (IAS), Nanjing Tech University, 30 South Puzhu Road, Nanjing 211816, China
| | - Huaimin Wang
- Key Laboratory of Precise Synthesis of Functional Molecules of Zhejiang Province, School of Science, Westlake University, 18 Shilongshan Road, Hangzhou 310024, China.,Institute of Natural Sciences, Westlake Institute for Advanced Study, Hangzhou 310024, China
| | - Xin Hong
- Department of Chemistry, Zhejiang University, 866 Yuhangtang Road, Hangzhou 310058, China
| | - Hai-Hua Lu
- Key Laboratory of Precise Synthesis of Functional Molecules of Zhejiang Province, School of Science, Westlake University, 18 Shilongshan Road, Hangzhou 310024, China.,Institute of Natural Sciences, Westlake Institute for Advanced Study, Hangzhou 310024, China.,Institute of Advanced Synthesis (IAS), Nanjing Tech University, 30 South Puzhu Road, Nanjing 211816, China.,Department of Chemistry, Zhejiang University, 866 Yuhangtang Road, Hangzhou 310058, China
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30
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Mando M, Grellepois F, Riguet E. Organocatalytic enantioselective allylic alkylation of α-aryl γ-lactones: an approach to densely functionalized quaternary stereocentres. Chem Commun (Camb) 2020; 56:6640-6643. [PMID: 32406441 DOI: 10.1039/d0cc02058c] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The asymmetric allylic alkylation (AAA) of α-aryl γ-lactones involving the activation of Morita-Baylis-Hillman (MBH) carbonates by an original chiral Lewis base is reported. A wide range of γ-lactones bearing a quaternary stereocentre was thus obtained in both high yields and high enantiomeric ratios. The direct alkylation by MBH alcohol using in situ activation has been also established. Additionally synthetically useful functional transformations of groups surrounding the quaternary stereocentre have been performed.
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Affiliation(s)
- Morgane Mando
- Université de Reims Champagne Ardenne, CNRS, Institut de Chimie Moléculaire de Reims UMR 7312, 51097 Reims, France.
| | - Fabienne Grellepois
- Université de Reims Champagne Ardenne, CNRS, Institut de Chimie Moléculaire de Reims UMR 7312, 51097 Reims, France.
| | - Emmanuel Riguet
- Université de Reims Champagne Ardenne, CNRS, Institut de Chimie Moléculaire de Reims UMR 7312, 51097 Reims, France.
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31
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Wu Y, Huo X, Zhang W. Synergistic Pd/Cu Catalysis in Organic Synthesis. Chemistry 2020; 26:4895-4916. [DOI: 10.1002/chem.201904495] [Citation(s) in RCA: 72] [Impact Index Per Article: 18.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2019] [Indexed: 12/31/2022]
Affiliation(s)
- Yue Wu
- Shanghai Key Laboratory for Molecular Engineering of Chiral DrugsSchool of Chemistry and Chemical EngineeringShanghai Jiao Tong University 800 Dongchuan Road Shanghai 200240 P. R. China
- Zhiyuan CollegeShanghai Jiao Tong University 800 Dongchuan Road Shanghai 200240 P. R. China
| | - Xiaohong Huo
- Shanghai Key Laboratory for Molecular Engineering of Chiral DrugsSchool of Chemistry and Chemical EngineeringShanghai Jiao Tong University 800 Dongchuan Road Shanghai 200240 P. R. China
| | - Wanbin Zhang
- Shanghai Key Laboratory for Molecular Engineering of Chiral DrugsSchool of Chemistry and Chemical EngineeringShanghai Jiao Tong University 800 Dongchuan Road Shanghai 200240 P. R. China
- College of Chemistry and Molecular EngineeringZhengzhou University 75 Daxue Road Zhengzhou 450052 P. R. China
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32
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Smaligo AJ, Swain M, Quintana JC, Tan MF, Kim DA, Kwon O. Hydrodealkenylative C(sp 3)-C(sp 2) bond fragmentation. Science 2019; 364:681-685. [PMID: 31097667 DOI: 10.1126/science.aaw4212] [Citation(s) in RCA: 69] [Impact Index Per Article: 13.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/18/2018] [Accepted: 03/14/2019] [Indexed: 12/19/2022]
Abstract
Chemical synthesis typically relies on reactions that generate complexity through elaboration of simple starting materials. Less common are deconstructive strategies toward complexity-particularly those involving carbon-carbon bond scission. Here, we introduce one such transformation: the hydrodealkenylative cleavage of C(sp3)-C(sp2) bonds, conducted below room temperature, using ozone, an iron salt, and a hydrogen atom donor. These reactions are performed in nonanhydrous solvents and open to the air; reach completion within 30 minutes; and deliver their products in high yields, even on decagram scales. We have used this broadly functionality tolerant transformation to produce desirable synthetic intermediates, many of which are optically active, from abundantly available terpenes and terpenoid-derived precursors. We have also applied it in the formal total syntheses of complex molecules.
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Affiliation(s)
- Andrew J Smaligo
- Department of Chemistry and Biochemistry, University of California, Los Angeles, Los Angeles, CA 90095, USA
| | - Manisha Swain
- Department of Chemistry and Biochemistry, University of California, Los Angeles, Los Angeles, CA 90095, USA
| | - Jason C Quintana
- Department of Chemistry and Biochemistry, University of California, Los Angeles, Los Angeles, CA 90095, USA
| | - Mikayla F Tan
- Department of Chemistry and Biochemistry, University of California, Los Angeles, Los Angeles, CA 90095, USA
| | - Danielle A Kim
- Department of Chemistry and Biochemistry, University of California, Los Angeles, Los Angeles, CA 90095, USA
| | - Ohyun Kwon
- Department of Chemistry and Biochemistry, University of California, Los Angeles, Los Angeles, CA 90095, USA.
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33
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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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34
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Liu C, Deng C, Yang H, Qian X, Tang S, Poznik M, Chruma JJ. Nickel-Catalyzed Decarboxylative Generation and Asymmetric Allylation of 2-Azaallyl Anions. J Org Chem 2019; 84:10102-10110. [PMID: 31328915 DOI: 10.1021/acs.joc.9b01293] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
The first nickel-catalyzed asymmetric decarboxylative allylation (DcA) of allyl 2,2-diarylglycinate imines is reported. This transformation utilizes a chiral ferrocenyl bidentate ligand and a Ni(0) precatalyst to mediate the decarboxylative generation and asymmetric allylation of 2-azaallyl anions, affording α-aryl homoallylic imines in modest-to-high yields and moderate-to-high enantiomeric ratios. The resulting Ni-catalyzed transformation proved to be less general in comparison to our previously reported analogous Pd-mediated protocol, but it still exhibited certain advantages in regard to the regio- and enantioselectivity of the C-C bond formation.
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Affiliation(s)
- Chenlu Liu
- Key Laboratory of Green Chemistry & Technology (MOE), College of Chemistry and Sino-British Materials Research Institute, College of Physical Science & Technology , Sichuan University , No. 29, Wangjiang Road , Chengdu 610064 , China
| | - Changfeng Deng
- Key Laboratory of Green Chemistry & Technology (MOE), College of Chemistry and Sino-British Materials Research Institute, College of Physical Science & Technology , Sichuan University , No. 29, Wangjiang Road , Chengdu 610064 , China
| | - Han Yang
- Key Laboratory of Green Chemistry & Technology (MOE), College of Chemistry and Sino-British Materials Research Institute, College of Physical Science & Technology , Sichuan University , No. 29, Wangjiang Road , Chengdu 610064 , China
| | - Xiaoyan Qian
- Key Laboratory of Green Chemistry & Technology (MOE), College of Chemistry and Sino-British Materials Research Institute, College of Physical Science & Technology , Sichuan University , No. 29, Wangjiang Road , Chengdu 610064 , China
| | - Shaojian Tang
- Key Laboratory of Green Chemistry & Technology (MOE), College of Chemistry and Sino-British Materials Research Institute, College of Physical Science & Technology , Sichuan University , No. 29, Wangjiang Road , Chengdu 610064 , China
| | - Michal Poznik
- Key Laboratory of Green Chemistry & Technology (MOE), College of Chemistry and Sino-British Materials Research Institute, College of Physical Science & Technology , Sichuan University , No. 29, Wangjiang Road , Chengdu 610064 , China
| | - Jason J Chruma
- Key Laboratory of Green Chemistry & Technology (MOE), College of Chemistry and Sino-British Materials Research Institute, College of Physical Science & Technology , Sichuan University , No. 29, Wangjiang Road , Chengdu 610064 , China
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35
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O’Broin CQ, Guiry PJ. Construction of All-Carbon Quaternary Stereocenters by Palladium-Catalyzed Decarboxylative Propargylation. Org Lett 2019; 21:5402-5406. [DOI: 10.1021/acs.orglett.9b01493] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Affiliation(s)
- Calvin Q. O’Broin
- 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
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36
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Visse R, Möllemann MA, Braun M. Asymmetric Allylic Alkylation of Alkanoic-Acid Ester Enolates. European J Org Chem 2019. [DOI: 10.1002/ejoc.201900822] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Robin Visse
- Institute of Organic and Macromolecular Chemistry; Heinrich-Heine-University Düsseldorf; Universitätsstr. 1 40225 Düsseldorf Germany
| | - Martin-Alexander Möllemann
- Institute of Organic and Macromolecular Chemistry; Heinrich-Heine-University Düsseldorf; Universitätsstr. 1 40225 Düsseldorf Germany
| | - Manfred Braun
- Institute of Organic and Macromolecular Chemistry; Heinrich-Heine-University Düsseldorf; Universitätsstr. 1 40225 Düsseldorf Germany
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37
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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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38
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Nie W, Gong J, Chen Z, Liu J, Tian D, Song H, Liu XY, Qin Y. Enantioselective Total Synthesis of (−)-Arcutinine. J Am Chem Soc 2019; 141:9712-9718. [PMID: 31136168 DOI: 10.1021/jacs.9b04847] [Citation(s) in RCA: 48] [Impact Index Per Article: 9.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
Affiliation(s)
- Wei Nie
- Key Laboratory of Drug-Targeting and Drug Delivery System of the Education Ministry, Sichuan Engineering Laboratory for Plant-Sourced Drug and Sichuan Research Center for Drug Precision Industrial Technology, West China School of Pharmacy, Sichuan University, Chengdu 610041, P.R. China
| | - Jing Gong
- Key Laboratory of Drug-Targeting and Drug Delivery System of the Education Ministry, Sichuan Engineering Laboratory for Plant-Sourced Drug and Sichuan Research Center for Drug Precision Industrial Technology, West China School of Pharmacy, Sichuan University, Chengdu 610041, P.R. China
| | - Zhihao Chen
- Key Laboratory of Drug-Targeting and Drug Delivery System of the Education Ministry, Sichuan Engineering Laboratory for Plant-Sourced Drug and Sichuan Research Center for Drug Precision Industrial Technology, West China School of Pharmacy, Sichuan University, Chengdu 610041, P.R. China
| | - Jiazhen Liu
- Key Laboratory of Drug-Targeting and Drug Delivery System of the Education Ministry, Sichuan Engineering Laboratory for Plant-Sourced Drug and Sichuan Research Center for Drug Precision Industrial Technology, West China School of Pharmacy, Sichuan University, Chengdu 610041, P.R. China
| | - Di Tian
- Key Laboratory of Drug-Targeting and Drug Delivery System of the Education Ministry, Sichuan Engineering Laboratory for Plant-Sourced Drug and Sichuan Research Center for Drug Precision Industrial Technology, West China School of Pharmacy, Sichuan University, Chengdu 610041, P.R. China
| | - Hao Song
- Key Laboratory of Drug-Targeting and Drug Delivery System of the Education Ministry, Sichuan Engineering Laboratory for Plant-Sourced Drug and Sichuan Research Center for Drug Precision Industrial Technology, West China School of Pharmacy, Sichuan University, Chengdu 610041, P.R. China
| | - Xiao-Yu Liu
- Key Laboratory of Drug-Targeting and Drug Delivery System of the Education Ministry, Sichuan Engineering Laboratory for Plant-Sourced Drug and Sichuan Research Center for Drug Precision Industrial Technology, West China School of Pharmacy, Sichuan University, Chengdu 610041, P.R. China
| | - Yong Qin
- Key Laboratory of Drug-Targeting and Drug Delivery System of the Education Ministry, Sichuan Engineering Laboratory for Plant-Sourced Drug and Sichuan Research Center for Drug Precision Industrial Technology, West China School of Pharmacy, Sichuan University, Chengdu 610041, P.R. China
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39
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Alexy EJ, Fulton TJ, Zhang H, Stoltz BM. Palladium-catalyzed enantioselective decarboxylative allylic alkylation of fully substituted N-acyl indole-derived enol carbonates. Chem Sci 2019; 10:5996-6000. [PMID: 31360407 PMCID: PMC6566452 DOI: 10.1039/c9sc01726g] [Citation(s) in RCA: 30] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/08/2019] [Accepted: 04/26/2019] [Indexed: 01/06/2023] Open
Abstract
The first enantioselective Pd-catalyzed decarboxylative allylic alkylation of fully substituted N-acyl indole-derived enol carbonates generates acyclic all-carbon quaternary stereocenters in excellent yields (up to 99%) and enantioselectivities (up to 98% ee) using a new electron-deficient phosphinoxazoline (PHOX) ligand.
The first enantioselective palladium-catalyzed decarboxylative allylic alkylation of fully substituted N-acyl indole-derived enol carbonates forming acyclic all-carbon quaternary stereocenters is reported. Excellent yields up to 99% and enantioselectivities up to 98% ee are obtained through the use of a new electron-deficient phosphinoxazoline (PHOX) ligand. Control of substrate enolate geometry is crucial for high selectivity. The obtained α-quaternary N-acyl indoles are formal ester equivalents, and represent a useful handle for further synthetic transformations.
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Affiliation(s)
- Eric J Alexy
- Warren and Katharine Schlinger Laboratory for Chemistry and Chemical Engineering , Division of Chemistry and Chemical Engineering , California Institute of Technology , Pasadena , CA 91125 , USA .
| | - Tyler J Fulton
- Warren and Katharine Schlinger Laboratory for Chemistry and Chemical Engineering , Division of Chemistry and Chemical Engineering , California Institute of Technology , Pasadena , CA 91125 , USA .
| | - Haiming Zhang
- Small Molecule Process Chemistry, Genentech, Inc. , 1 DNA Way , South San Francisco , CA 94080 , USA .
| | - Brian M Stoltz
- Warren and Katharine Schlinger Laboratory for Chemistry and Chemical Engineering , Division of Chemistry and Chemical Engineering , California Institute of Technology , Pasadena , CA 91125 , USA .
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40
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Ghosh AK, Born JR, Kassekert L. Enantioselective Total Syntheses of (+)-Fendleridine and (+)-Acetylaspidoalbidine. J Org Chem 2019; 84:5167-5175. [PMID: 30939004 PMCID: PMC6594018 DOI: 10.1021/acs.joc.9b00145] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Enantioselective syntheses of hexacyclic aspidoalbidine alkaloids (+)-fendleridine (2) and (+)-acetylaspidoalbidine (3) are described. These syntheses feature an asymmetric decarboxylative allylation and photocyclization of a highly substituted enaminone. Also, the synthesis highlights the formation of a C19-hemiaminal ether via a reduction/condensation/intramolecular cyclization cascade with the C21-alcohol. The present synthesis provides convenient access to the aspidoalbidine hexacyclic alkaloid family in an efficient manner.
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Affiliation(s)
- Arun K. Ghosh
- Department of Chemistry and Department of Medicinal Chemistry, Purdue University, 560 Oval Drive, West Lafayette, Indiana 47907
| | - Joshua R. Born
- Department of Chemistry and Department of Medicinal Chemistry, Purdue University, 560 Oval Drive, West Lafayette, Indiana 47907
| | - Luke Kassekert
- Department of Chemistry and Department of Medicinal Chemistry, Purdue University, 560 Oval Drive, West Lafayette, Indiana 47907
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41
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James J, Jackson M, Guiry PJ. Palladium‐Catalyzed Decarboxylative Asymmetric Allylic Alkylation: Development, Mechanistic Understanding and Recent Advances. Adv Synth Catal 2019. [DOI: 10.1002/adsc.201801575] [Citation(s) in RCA: 43] [Impact Index Per Article: 8.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Affiliation(s)
- Jinju James
- Centre for Synthesis and Chemical BiologySchool of ChemistryUniversity College Dublin Belfield Dublin 4 Ireland
| | - Mark Jackson
- Centre for Synthesis and Chemical BiologySchool of ChemistryUniversity College Dublin Belfield Dublin 4 Ireland
| | - Patrick J. Guiry
- Centre for Synthesis and Chemical BiologySchool of ChemistryUniversity College Dublin Belfield Dublin 4 Ireland
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42
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Pritchett BP, Stoltz BM. Enantioselective palladium-catalyzed allylic alkylation reactions in the synthesis of Aspidosperma and structurally related monoterpene indole alkaloids. Nat Prod Rep 2019; 35:559-574. [PMID: 29658039 DOI: 10.1039/c7np00069c] [Citation(s) in RCA: 95] [Impact Index Per Article: 19.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Covering: up to the end of 2017 Enantioselective Pd-catalyzed allylic alkylations of prochiral enolates represent a powerful tool for the construction of all-carbon quaternary stereocenters. This review describes the emergence of such reactions as strategic linchpins that enable efficient, stereocontrolled syntheses of Aspidosperma and related monoterpene indole alkaloids.
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Affiliation(s)
- Beau P Pritchett
- The 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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43
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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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44
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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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45
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Cheng Q, Xie J, Weng Y, You S. Pd‐Catalyzed Dearomatization of Anthranils with Vinylcyclopropanes by [4+3] Cyclization Reaction. Angew Chem Int Ed Engl 2019. [DOI: 10.1002/ange.201901251] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Affiliation(s)
- Qiang Cheng
- State Key Laboratory of Organometallic ChemistryCenter for Excellence in Molecular SynthesisShanghai Institute of Organic ChemistryUniversity of Chinese Academy of SciencesChinese Academy of Sciences 345 Lingling Lu Shanghai 200032 China
| | - Jia‐Hao Xie
- State Key Laboratory of Organometallic ChemistryCenter for Excellence in Molecular SynthesisShanghai Institute of Organic ChemistryUniversity of Chinese Academy of SciencesChinese Academy of Sciences 345 Lingling Lu Shanghai 200032 China
| | - Yue‐Cheng Weng
- State Key Laboratory of Organometallic ChemistryCenter for Excellence in Molecular SynthesisShanghai Institute of Organic ChemistryUniversity of Chinese Academy of SciencesChinese Academy of Sciences 345 Lingling Lu Shanghai 200032 China
| | - Shu‐Li You
- State Key Laboratory of Organometallic ChemistryCenter for Excellence in Molecular SynthesisShanghai Institute of Organic ChemistryUniversity of Chinese Academy of SciencesChinese Academy of Sciences 345 Lingling Lu Shanghai 200032 China
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46
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Cheng Q, Xie J, Weng Y, You S. Pd‐Catalyzed Dearomatization of Anthranils with Vinylcyclopropanes by [4+3] Cyclization Reaction. Angew Chem Int Ed Engl 2019; 58:5739-5743. [DOI: 10.1002/anie.201901251] [Citation(s) in RCA: 61] [Impact Index Per Article: 12.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/29/2019] [Indexed: 12/11/2022]
Affiliation(s)
- Qiang Cheng
- State Key Laboratory of Organometallic ChemistryCenter for Excellence in Molecular SynthesisShanghai Institute of Organic ChemistryUniversity of Chinese Academy of SciencesChinese Academy of Sciences 345 Lingling Lu Shanghai 200032 China
| | - Jia‐Hao Xie
- State Key Laboratory of Organometallic ChemistryCenter for Excellence in Molecular SynthesisShanghai Institute of Organic ChemistryUniversity of Chinese Academy of SciencesChinese Academy of Sciences 345 Lingling Lu Shanghai 200032 China
| | - Yue‐Cheng Weng
- State Key Laboratory of Organometallic ChemistryCenter for Excellence in Molecular SynthesisShanghai Institute of Organic ChemistryUniversity of Chinese Academy of SciencesChinese Academy of Sciences 345 Lingling Lu Shanghai 200032 China
| | - Shu‐Li You
- State Key Laboratory of Organometallic ChemistryCenter for Excellence in Molecular SynthesisShanghai Institute of Organic ChemistryUniversity of Chinese Academy of SciencesChinese Academy of Sciences 345 Lingling Lu Shanghai 200032 China
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47
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Su HY, Gorelik D, Taylor MS. Chiral phosphine ligand libraries based on the Bull–James three-component supramolecular assembly. Supramol Chem 2019. [DOI: 10.1080/10610278.2018.1564829] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
Affiliation(s)
- Hsin Y. Su
- Department of Chemistry, University of Toronto, Toronto, Canada
| | - Daniel Gorelik
- Department of Chemistry, University of Toronto, Toronto, Canada
| | - Mark S. Taylor
- Department of Chemistry, University of Toronto, Toronto, Canada
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48
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Niwa Y, Miyake M, Hayakawa I, Sakakura A. Catalytic enantioselective Hosomi–Sakurai reaction of α-ketoesters promoted by chiral copper(ii) complexes. Chem Commun (Camb) 2019; 55:3923-3926. [DOI: 10.1039/c9cc01159e] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
The first catalytic enantioselective Hosomi−Sakurai reaction of α-ketoesters.
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Affiliation(s)
- Yutaro Niwa
- Graduate School of Natural Science and Technology, Okayama University
- Okayama
- Japan
| | - Mayu Miyake
- Graduate School of Natural Science and Technology, Okayama University
- Okayama
- Japan
| | - Ichiro Hayakawa
- Graduate School of Natural Science and Technology, Okayama University
- Okayama
- Japan
| | - Akira Sakakura
- Graduate School of Natural Science and Technology, Okayama University
- Okayama
- Japan
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49
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Shockley SE, Hethcox JC, Stoltz BM. Intermolecular Stereoselective Iridium-Catalyzed Allylic Alkylation: An Evolutionary Account. Synlett 2018; 29:2481-2492. [PMID: 31754289 PMCID: PMC6870865 DOI: 10.1055/s-0037-1610217] [Citation(s) in RCA: 44] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
Abstract
Our lab has long been interested in the development of methods for the creation of enantioenriched all-carbon quaternary stereocenters. Historically, our interest has centered on palladium-catalyzed allylic alkylation, though recent efforts have moved to include the study of iridium catalysts. Whereas palladium catalysts enable the preparation of isolated stereocenters, the use of iridium catalysts allows for the direct construction of vicinal stereocenters via an enantio-, diastereo-, and regioselective allylic alkylation. This account details the evolution of our research program from inception, which focused on the first iridium-catalyzed allylic alkylation to prepare stereodyads containing a single quaternary center, to our most recent discovery that allows for the synthesis of vicinal quaternary centers.
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Affiliation(s)
| | | | - Brian M. Stoltz
- The Warren and Katherine 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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50
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Liu J, Mishra S, Aponick A. Enol Acetates: Versatile Substrates for the Enantioselective Intermolecular Tsuji Allylation. J Am Chem Soc 2018; 140:16152-16158. [DOI: 10.1021/jacs.8b08746] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
Affiliation(s)
- Ji Liu
- Florida Center for Heterocyclic Compounds and Department of Chemistry, University of Florida, Gainesville, Florida 32611, United States
| | - Sourabh Mishra
- Florida Center for Heterocyclic Compounds and Department of Chemistry, University of Florida, Gainesville, Florida 32611, United States
| | - Aaron Aponick
- Florida Center for Heterocyclic Compounds and Department of Chemistry, University of Florida, Gainesville, Florida 32611, United States
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