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Ravi Kumar G, Rajashekhar Reddy M, Yogananda Chary D, Banik S, Sridhar B, Subba Reddy B. Cooperative catalytic Prins cyclization for the construction of azaspiro[5.5]undec-2-ene frameworks. Tetrahedron Lett 2022. [DOI: 10.1016/j.tetlet.2022.154174] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
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2
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Mizukami D, Iio K, Oda M, Onodera Y, Fuwa H. Tandem Macrolactone Synthesis: Total Synthesis of (-)-Exiguolide by a Macrocyclization/Transannular Pyran Cyclization Strategy. Angew Chem Int Ed Engl 2022; 61:e202202549. [PMID: 35243740 DOI: 10.1002/anie.202202549] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/16/2022] [Indexed: 12/25/2022]
Abstract
Tetrahydropyran-containing macrolactones were synthesized by integrating Meyer-Schuster rearrangement, macrocyclic ring-closing metathesis, and transannular oxa-Michael addition under gold and ruthenium catalysis. Single-step access to a variety of 14- to 20-membered macrolactones containing a tetrahydropyran ring was possible from readily available linear precursors in good yields and with moderate to excellent diastereoselectivity. A 13-step synthesis of (-)-exiguolide, an anticancer marine macrolide, showcased the feasibility of our tandem reaction sequence for macrolactone synthesis and also demonstrated the power of transannular reactions for rapid assembly of the tetrahydropyran rings of the target natural product.
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Affiliation(s)
- Daichi Mizukami
- Department of Applied Chemistry, Faculty of Science and Engineering, Chuo University, 1-13-27 Kasuga, Bunkyo-ku, Tokyo, 112-8551, Japan
| | - Kei Iio
- Department of Applied Chemistry, Faculty of Science and Engineering, Chuo University, 1-13-27 Kasuga, Bunkyo-ku, Tokyo, 112-8551, Japan
| | - Mami Oda
- Department of Applied Chemistry, Faculty of Science and Engineering, Chuo University, 1-13-27 Kasuga, Bunkyo-ku, Tokyo, 112-8551, Japan
| | - Yu Onodera
- Graduate School of Life Sciences, Tohoku University, 2-1-1 Katahira, Aoba-ku, Sendai, 981-8577, Japan
| | - Haruhiko Fuwa
- Department of Applied Chemistry, Faculty of Science and Engineering, Chuo University, 1-13-27 Kasuga, Bunkyo-ku, Tokyo, 112-8551, Japan
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3
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Mizukami D, Iio K, Oda M, Onodera Y, Fuwa H. Tandem Macrolactone Synthesis: Total Synthesis of (−)‐Exiguolide by a Macrocyclization/Transannular Pyran Cyclization Strategy. Angew Chem Int Ed Engl 2022. [DOI: 10.1002/ange.202202549] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Daichi Mizukami
- Chuo University - Korakuen Campus: Chuo Daigaku - Korakuen Campus Department of Applied Chemistry JAPAN
| | - Kei Iio
- Chuo University - Korakuen Campus: Chuo Daigaku - Korakuen Campus Department of Applied Chemistry JAPAN
| | - Mami Oda
- Chuo University - Korakuen Campus: Chuo Daigaku - Korakuen Campus Department of Applied Chemistry JAPAN
| | - Yu Onodera
- Tohoku University - Katahira Campus: Tohoku Daigaku Graduate School of Life Sciences JAPAN
| | - Haruhiko Fuwa
- Chuo University Department of Applied Chemistry 1-13-27 KasugaBunkyo-ku 112-8551 Tokyo JAPAN
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4
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Fuwa H. Total Synthesis of (−)-Exiguolide, a Potent Anticancer Marine Macrolide. HETEROCYCLES 2022. [DOI: 10.3987/rev-22-983] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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5
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Khan I, Ibrar A, Zaib S. Alkynoates as Versatile and Powerful Chemical Tools for the Rapid Assembly of Diverse Heterocycles under Transition-Metal Catalysis: Recent Developments and Challenges. Top Curr Chem (Cham) 2021; 379:3. [PMID: 33398642 DOI: 10.1007/s41061-020-00316-4] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/18/2020] [Accepted: 11/16/2020] [Indexed: 12/15/2022]
Abstract
Heterocycles, heteroaromatics and spirocyclic entities are ubiquitous components of a wide plethora of synthetic drugs, biologically active natural products, marketed pharmaceuticals and agrochemical targets. Recognizing their high proportion in drugs and rich pharmacological potential, these invaluable structural motifs have garnered significant interest, thus enabling the development of efficient catalytic methodologies providing access to architecturally complex and diverse molecules with high atom-economy and low cost. These chemical processes not only allow the formation of diverse heterocycles but also utilize a range of flexible and easily accessible building units in a single operation to discover diversity-oriented synthetic approaches. Alkynoates are significantly important, diverse and powerful building blocks in organic chemistry due to their unique and inherent properties such as the electronic bias on carbon-carbon triple bonds posed by electron-withdrawing groups or the metallic coordination site provided by carbonyl groups. The present review highlights the comprehensive picture of the utility of alkynoates (2007-2019) for the synthesis of various heterocycles (> 50 types) using transition-metal catalysts (Ru, Rh, Pd, Ir, Ag, Au, Pt, Cu, Mn, Fe) in various forms. The valuable function of versatile alkynoates (bearing multifunctional groups) as simple and useful starting materials is explored, thus cyclizing with an array of coupling partners to deliver a broad range of oxygen-, nitrogen-, sulfur-containing heterocycles alongside fused-, and spiro-heterocyclic compounds. In addition, these examples will also focus the scope and reaction limitations, as well as mechanistic investigations into the synthesis of these heterocycles. The biological significance will also be discussed, citing relevant examples of drug molecules highlighting each class of heterocycles. This review summarizes the recent developments in the synthetic methods for the synthesis of various heterocycles using alkynoates as readily available starting materials under transition-metal catalysis.
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Affiliation(s)
- Imtiaz Khan
- Department of Chemistry, School of Natural Sciences, The University of Manchester, Oxford Road, Manchester, M13 9PL, UK.
- Manchester Institute of Biotechnology, The University of Manchester, 131 Princess Street, Manchester, M1 7DN, UK.
| | - Aliya Ibrar
- Department of Chemistry, Faculty of Natural Sciences, The University of Haripur, Haripur, KPK-22620, Pakistan
| | - Sumera Zaib
- Department of Biochemistry, Faculty of Life Sciences, University of Central Punjab, Lahore, 54590, Pakistan
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6
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Oka K, Fuchi S, Komine K, Fukuda H, Hatakeyama S, Ishihara J. Catalytic Asymmetric Total Synthesis of Exiguolide. Chemistry 2020; 26:12862-12867. [PMID: 32428309 DOI: 10.1002/chem.202001773] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/12/2020] [Revised: 05/09/2020] [Indexed: 11/12/2022]
Abstract
The catalytic asymmetric total synthesis of (-)-exiguolide, a complex 20-membered macrolide embedded with a bis(tetrahydropyran) motif, is reported. The convergent synthesis involves the construction of the C1-C11 tetrahydropyran segment via catalytic asymmetric allylation and Prins cyclization, and the formation of the C12-C21 phosphonate segment via catalytic asymmetric cyclocondensation reaction and Johnson-Claisen rearrangement. The synthesis of 15-epi-exiguolide is also described.
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Affiliation(s)
- Kengo Oka
- Graduate School of Biomedical Sciences, Nagasaki University, Bunkyo-machi, Nagasaki, 852-8521, Japan
| | - Shunsuke Fuchi
- Graduate School of Biomedical Sciences, Nagasaki University, Bunkyo-machi, Nagasaki, 852-8521, Japan
| | - Keita Komine
- Graduate School of Biomedical Sciences, Nagasaki University, Bunkyo-machi, Nagasaki, 852-8521, Japan
| | - Hayato Fukuda
- Graduate School of Biomedical Sciences, Nagasaki University, Bunkyo-machi, Nagasaki, 852-8521, Japan
| | - Susumi Hatakeyama
- Medical Innovation Center, Nagasaki University, Bunkyo-machi, Nagasaki, 852-8521, Japan
| | - Jun Ishihara
- Graduate School of Biomedical Sciences, Nagasaki University, Bunkyo-machi, Nagasaki, 852-8521, Japan
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7
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Betori RC, Liu Y, Mishra RK, Cohen SB, Kron SJ, Scheidt KA. Targeted Covalent Inhibition of Telomerase. ACS Chem Biol 2020; 15:706-717. [PMID: 32017522 DOI: 10.1021/acschembio.9b00945] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
Abstract
Telomerase is a ribonuceloprotein complex responsible for maintaining telomeres and protecting chromosomal integrity. The human telomerase reverse transcriptase (hTERT) is expressed in ∼90% of cancer cells where it confers the capacity for limitless proliferation. Along with its established role in telomere lengthening, telomerase also serves noncanonical extra-telomeric roles in oncogenic signaling, resistance to apoptosis, and enhanced DNA damage response. We report a new class of natural-product-inspired covalent inhibitors of telomerase that target the catalytic active site.
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Affiliation(s)
- Rick C. Betori
- Department of Chemistry, Northwestern University, Evanston, Illinois 60208, United States
| | - Yue Liu
- Ludwig Center for Metastasis Research, The University of Chicago, Chicago, Illinois 60637, United States
| | - Rama K. Mishra
- Center for Molecular Innovation and Drug Discovery, Northwestern University, Evanston, Illinois 60208, United States
| | - Scott B. Cohen
- Children’s Medical Research Institute, University of Sydney, Westmead, New South Wales 2145, Australia
| | - Stephen J. Kron
- Ludwig Center for Metastasis Research, The University of Chicago, Chicago, Illinois 60637, United States
| | - Karl A. Scheidt
- Department of Chemistry, Northwestern University, Evanston, Illinois 60208, United States
- Department of Pharmacology, Northwestern University, Chicago, Illinois 60611, United States
- Center for Molecular Innovation and Drug Discovery, Northwestern University, Evanston, Illinois 60208, United States
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8
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Ishihara J. Chiral Lewis Acid-template Diels-Alder Reaction and the Application of Natural Product Synthesis. J SYN ORG CHEM JPN 2020. [DOI: 10.5059/yukigoseikyokaishi.78.204] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
Affiliation(s)
- Jun Ishihara
- Graduate School of Biomedical Sciences, Nagasaki University
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9
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Beejapur HA, Zhang Q, Hu K, Zhu L, Wang J, Ye Z. TEMPO in Chemical Transformations: From Homogeneous to Heterogeneous. ACS Catal 2019. [DOI: 10.1021/acscatal.8b05001] [Citation(s) in RCA: 88] [Impact Index Per Article: 17.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Affiliation(s)
- Hazi Ahmad Beejapur
- State Key Laboratory Breeding Base of Green Chemistry-Synthesis Technology, Zhejiang Province Key Laboratory of Biofuel, Biodiesel Laboratory of China Petroleum and Chemical Industry Federation, College of Chemical Engineering, Zhejiang University of Technology, Hangzhou 310014, P. R. China
| | - Qi Zhang
- State Key Laboratory Breeding Base of Green Chemistry-Synthesis Technology, Zhejiang Province Key Laboratory of Biofuel, Biodiesel Laboratory of China Petroleum and Chemical Industry Federation, College of Chemical Engineering, Zhejiang University of Technology, Hangzhou 310014, P. R. China
| | - Kecheng Hu
- State Key Laboratory Breeding Base of Green Chemistry-Synthesis Technology, Zhejiang Province Key Laboratory of Biofuel, Biodiesel Laboratory of China Petroleum and Chemical Industry Federation, College of Chemical Engineering, Zhejiang University of Technology, Hangzhou 310014, P. R. China
| | - Li Zhu
- State Key Laboratory Breeding Base of Green Chemistry-Synthesis Technology, Zhejiang Province Key Laboratory of Biofuel, Biodiesel Laboratory of China Petroleum and Chemical Industry Federation, College of Chemical Engineering, Zhejiang University of Technology, Hangzhou 310014, P. R. China
| | - Jianli Wang
- State Key Laboratory Breeding Base of Green Chemistry-Synthesis Technology, Zhejiang Province Key Laboratory of Biofuel, Biodiesel Laboratory of China Petroleum and Chemical Industry Federation, College of Chemical Engineering, Zhejiang University of Technology, Hangzhou 310014, P. R. China
| | - Zhibin Ye
- Department of Chemical and Materials Engineering, Concordia University, Montreal, Quebec H3G 1M8, Canada
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10
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Vincent CT, Long ET, Jones HC, Young JC, Spiegel PC, O'Neil GW. Suzuki coupling-based synthesis of VATPase inhibitor archazolid natural product derived fragments. RSC Adv 2019; 9:32210-32218. [PMID: 35530773 PMCID: PMC9072946 DOI: 10.1039/c9ra07050h] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/03/2019] [Revised: 10/29/2019] [Accepted: 10/02/2019] [Indexed: 11/21/2022] Open
Abstract
An archazolid natural product fragment that displays dose-dependent inhibition of the vacuolar-type ATPase (VATPase) has been synthesized by a high-yielding Suzuki coupling of two complex subunits. Similarly, a further simplified fragment was prepared and evaluated for VATPase inhibitory activity. This compound did inhibit the VATPase, as evidenced by growth inhibition of etiolated Arabidopsis seedlings, however at approximately 10× lower potency than the more complex fragment. Cyclooxygenase (COX) enzyme inhibition was not observed for either fragment. An archazolid natural product fragment that displays dose-dependent inhibition of the vacuolar-type ATPase (VATPase) has been synthesized by a high-yielding Suzuki coupling of two complex subunits.![]()
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Affiliation(s)
- Cooper T. Vincent
- Department of Chemistry
- Western Washington University
- Bellingham
- USA 98229
| | - Evan T. Long
- Department of Chemistry
- Western Washington University
- Bellingham
- USA 98229
| | - Holly C. Jones
- Department of Chemistry
- Western Washington University
- Bellingham
- USA 98229
| | - Jeffrey C. Young
- Department of Biology
- Western Washington University
- Bellingham
- USA 98229
| | - P. Clint Spiegel
- Department of Chemistry
- Western Washington University
- Bellingham
- USA 98229
| | - Gregory W. O'Neil
- Department of Chemistry
- Western Washington University
- Bellingham
- USA 98229
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11
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Ishihara J, Hatakeyama S, Ohzono Y, Oka K, Urayama Y. Bimetallic Lewis Acid Template-Mediated Enantioselective Hetero-Diels-Alder Reactions of 4-Siloxy-2,4-pentadienols. HETEROCYCLES 2019. [DOI: 10.3987/com-18-s(f)54] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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12
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Zheng K, Hong R. Stereoconfining macrocyclizations in the total synthesis of natural products. Nat Prod Rep 2019; 36:1546-1575. [DOI: 10.1039/c8np00094h] [Citation(s) in RCA: 23] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
This review covers selected examples of point chirality-forming macrocyclizations in natural product total synthesis in the past three decades.
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Affiliation(s)
- Kuan Zheng
- Key Laboratory of Synthetic Chemistry of Natural Substances
- Center for Excellence in Molecular Synthesis
- Shanghai Institute of Organic Chemistry
- Chinese Academy of Sciences
- Shanghai 200032
| | - Ran Hong
- Key Laboratory of Synthetic Chemistry of Natural Substances
- Center for Excellence in Molecular Synthesis
- Shanghai Institute of Organic Chemistry
- Chinese Academy of Sciences
- Shanghai 200032
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13
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Mondal B, Balha M, Pan SC. Organocatalytic Asymmetric Synthesis of Highly Substituted Tetrahydrofurans and Tetrahydropyrans via Double Michael Addition Strategy. ASIAN J ORG CHEM 2018. [DOI: 10.1002/ajoc.201800316] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Affiliation(s)
- Buddahdeb Mondal
- Department of Chemistry; Indian Institute of Technology Guwahati; Assam 781039 India
| | - Megha Balha
- Department of Chemistry; Indian Institute of Technology Guwahati; Assam 781039 India
| | - Subhas Chandra Pan
- Department of Chemistry; Indian Institute of Technology Guwahati; Assam 781039 India
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14
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Lee A, Betori RC, Crane EA, Scheidt KA. An Enantioselective Cross-Dehydrogenative Coupling Catalysis Approach to Substituted Tetrahydropyrans. J Am Chem Soc 2018; 140:6212-6216. [PMID: 29714480 PMCID: PMC6052785 DOI: 10.1021/jacs.8b03063] [Citation(s) in RCA: 44] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
Abstract
An enantioselective cross-dehydrogenative coupling (CDC) reaction to access tetrahydropyrans has been developed. This process combines in situ Lewis acid activation of a nucleophile in concert with the oxidative formation of a transient oxocarbenium electrophile, leading to a productive and highly enantioselective CDC. These advances represent one of the first successful applications of CDC for the enantioselective couplings of unfunctionalized ethers. This system provides efficient access to valuable tetrahydropyran motifs found in many natural products and bioactive small molecules.
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Affiliation(s)
- Ansoo Lee
- Department of Chemistry, Center for Molecular Innovation and Drug Discovery, Northwestern University, 2145 Sheridan Road, Evanston, Illinois 60208, United States
| | - Rick C. Betori
- Department of Chemistry, Center for Molecular Innovation and Drug Discovery, Northwestern University, 2145 Sheridan Road, Evanston, Illinois 60208, United States
| | - Erika A. Crane
- Department of Chemistry, Center for Molecular Innovation and Drug Discovery, Northwestern University, 2145 Sheridan Road, Evanston, Illinois 60208, United States
| | - Karl A. Scheidt
- Department of Chemistry, Center for Molecular Innovation and Drug Discovery, Northwestern University, 2145 Sheridan Road, Evanston, Illinois 60208, United States
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15
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16
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Montgomery TP, Ahmed TS, Grubbs RH. Stereoretentive Olefin Metathesis: An Avenue to Kinetic Selectivity. Angew Chem Int Ed Engl 2017; 56:11024-11036. [PMID: 28599101 DOI: 10.1002/anie.201704686] [Citation(s) in RCA: 64] [Impact Index Per Article: 9.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/06/2017] [Indexed: 12/20/2022]
Abstract
Olefin metathesis is an incredibly valuable transformation that has gained widespread use in both academic and industrial settings. Lately, stereoretentive olefin metathesis has garnered much attention as a method for the selective generation of both E- and Z-olefins. Early studies employing ill-defined catalysts showed evidence for retention of the stereochemistry of the starting olefins at low conversion. However, thermodynamic ratios E/Z were reached as the reaction proceeded to equilibrium. Recent studies in olefin metathesis have focused on the synthesis of catalysts that can overcome the inherent thermodynamic preference of an olefin, providing synthetically useful quantities of a kinetically favored olefin isomer. These reports have led to the development of stereoretentive catalysts that not only generate Z-olefins selectively, but also kinetically produce E-olefins, a previously unmet challenge in olefin metathesis. Advancements in stereoretentive olefin metathesis using tungsten, ruthenium, and molybdenum catalysts are presented.
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Affiliation(s)
- T Patrick Montgomery
- Division of Chemistry and Chemical Engineering, California Institute of Technology, 1200 E California Blvd., Pasadena, CA, 91125, USA
| | - Tonia S Ahmed
- Division of Chemistry and Chemical Engineering, California Institute of Technology, 1200 E California Blvd., Pasadena, CA, 91125, USA
| | - Robert H Grubbs
- Division of Chemistry and Chemical Engineering, California Institute of Technology, 1200 E California Blvd., Pasadena, CA, 91125, USA
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17
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Betori RC, Miller ER, Scheidt KA. A Biocatalytic Route to Highly Enantioenriched β-Hydroxydioxinones. Adv Synth Catal 2017; 359:1131-1137. [PMID: 29104524 PMCID: PMC5663308 DOI: 10.1002/adsc.201700095] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
A novel biocatalytic system to access a wide variety of β-hydroxydioxinones from β-ketodioxinones employing commercial engineered ketoreductases has been developed. This practical system provides a remarkably straightforward solution to limitations in accessing certain chemical scaffolds common in β-hydroxydioxinones that are of great interest due to their diversification capabilities. A few highlights of this system are that it is high yielding, highly enantioselective, and chromatography-free. We have demonstrated both a wide substrate scope and a high degree of scalability.
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Affiliation(s)
- Rick C Betori
- Department of Chemistry, Northwestern University, 2145 Sheridan Road, Evanston, IL 60208, USA
| | - Eric R Miller
- Department of Chemistry, Northwestern University, 2145 Sheridan Road, Evanston, IL 60208, USA
| | - Karl A Scheidt
- Department of Chemistry, Northwestern University, 2145 Sheridan Road, Evanston, IL 60208, USA
- Center for Molecular Innovation and Drug Discovery, Northwestern University, 2145 Sheridan Road, Evanston, IL 60208, USA
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18
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Fuwa H, Sasaki M. Exploiting Ruthenium Carbene-Catalyzed Reactions in Total Synthesis of Marine Oxacyclic Natural Products. BULLETIN OF THE CHEMICAL SOCIETY OF JAPAN 2016. [DOI: 10.1246/bcsj.20160224] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
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19
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Xie Y, Cheng GJ, Lee S, Kaib PSJ, Thiel W, List B. Catalytic Asymmetric Vinylogous Prins Cyclization: A Highly Diastereo- and Enantioselective Entry to Tetrahydrofurans. J Am Chem Soc 2016; 138:14538-14541. [DOI: 10.1021/jacs.6b09129] [Citation(s) in RCA: 59] [Impact Index Per Article: 7.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Youwei Xie
- Max-Planck-Institut für Kohlenforschung, Kaiser-Wilhelm-Platz
1, 45470 Mülheim
an der Ruhr, Germany
| | - Gui-Juan Cheng
- Max-Planck-Institut für Kohlenforschung, Kaiser-Wilhelm-Platz
1, 45470 Mülheim
an der Ruhr, Germany
| | - Sunggi Lee
- Max-Planck-Institut für Kohlenforschung, Kaiser-Wilhelm-Platz
1, 45470 Mülheim
an der Ruhr, Germany
| | - Philip S. J. Kaib
- Max-Planck-Institut für Kohlenforschung, Kaiser-Wilhelm-Platz
1, 45470 Mülheim
an der Ruhr, Germany
| | - Walter Thiel
- Max-Planck-Institut für Kohlenforschung, Kaiser-Wilhelm-Platz
1, 45470 Mülheim
an der Ruhr, Germany
| | - Benjamin List
- Max-Planck-Institut für Kohlenforschung, Kaiser-Wilhelm-Platz
1, 45470 Mülheim
an der Ruhr, Germany
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20
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Liu L, Kaib PSJ, Tap A, List B. A General Catalytic Asymmetric Prins Cyclization. J Am Chem Soc 2016; 138:10822-5. [DOI: 10.1021/jacs.6b07240] [Citation(s) in RCA: 73] [Impact Index Per Article: 9.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Affiliation(s)
- Luping Liu
- Max-Planck-Institut für Kohlenforschung, Kaiser
Wilhelm-Platz 1, 45470 Mülheim an der Ruhr, Germany
| | - Philip S. J. Kaib
- Max-Planck-Institut für Kohlenforschung, Kaiser
Wilhelm-Platz 1, 45470 Mülheim an der Ruhr, Germany
| | - Aurélien Tap
- Max-Planck-Institut für Kohlenforschung, Kaiser
Wilhelm-Platz 1, 45470 Mülheim an der Ruhr, Germany
| | - Benjamin List
- Max-Planck-Institut für Kohlenforschung, Kaiser
Wilhelm-Platz 1, 45470 Mülheim an der Ruhr, Germany
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21
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Li L, Sun X, He Y, Gao L, Song Z. TMSBr/InBr3-promoted Prins cyclization/homobromination of dienyl alcohol with aldehyde to construct cis-THP containing an exocyclic E-alkene. Chem Commun (Camb) 2016; 51:14925-8. [PMID: 26303284 DOI: 10.1039/c5cc06270e] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
Abstract
A TMSBr/InBr3-promoted Prins cyclization/homobromination reaction of dienyl alcohol with aldehyde has been developed to construct a unique cis-E THP shown as the A ring in (-)-exiguolide and the B ring in bryostatins.
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Affiliation(s)
- Linjie Li
- Key Laboratory of Drug-Targeting and Drug Delivery System of the Education Ministry, West China School of Pharmacy, Sichuan University, Chengdu, 610041, China.
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22
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Direct synthesis of Z-alkenyl halides through catalytic cross-metathesis. Nature 2016; 531:459-65. [PMID: 27008965 PMCID: PMC4858352 DOI: 10.1038/nature17396] [Citation(s) in RCA: 130] [Impact Index Per Article: 16.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/10/2015] [Accepted: 02/02/2016] [Indexed: 12/23/2022]
Abstract
Olefin metathesis has had a large impact on modern organic chemistry, but important shortcomings remain: for example, the lack of efficient processes that can be used to generate acyclic alkenyl halides. Halo-substituted ruthenium carbene complexes decompose rapidly or deliver low activity and/or minimal stereoselectivity, and our understanding of the corresponding high-oxidation-state systems is limited. Here we show that previously unknown halo-substituted molybdenum alkylidene species are exceptionally reactive and are able to participate in high-yielding olefin metathesis reactions that afford acyclic 1,2-disubstituted Z-alkenyl halides. Transformations are promoted by small amounts of a catalyst that is generated in situ and used with unpurified, commercially available and easy-to-handle liquid 1,2-dihaloethene reagents, and proceed to high conversion at ambient temperature within four hours. We obtain many alkenyl chlorides, bromides and fluorides in up to 91 per cent yield and complete Z selectivity. This method can be used to synthesize biologically active compounds readily and to perform site- and stereoselective fluorination of complex organic molecules.
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23
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Fuwa H. Contemporary Strategies for the Synthesis of Tetrahydropyran Derivatives: Application to Total Synthesis of Neopeltolide, a Marine Macrolide Natural Product. Mar Drugs 2016; 14:E65. [PMID: 27023567 PMCID: PMC4849069 DOI: 10.3390/md14040065] [Citation(s) in RCA: 38] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/25/2016] [Revised: 03/15/2016] [Accepted: 03/17/2016] [Indexed: 02/07/2023] Open
Abstract
Tetrahydropyrans are structural motifs that are abundantly present in a range of biologically important marine natural products. As such, significant efforts have been paid to the development of efficient and versatile methods for the synthesis of tetrahydropyran derivatives. Neopeltolide, a potent antiproliferative marine natural product, has been an attractive target compound for synthetic chemists because of its complex structure comprised of a 14-membered macrolactone embedded with a tetrahydropyran ring, and twenty total and formal syntheses of this natural product have been reported so far. This review summarizes the total and formal syntheses of neopeltolide and its analogues, highlighting the synthetic strategies exploited for constructing the tetrahydropyran ring.
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Affiliation(s)
- Haruhiko Fuwa
- Graduate School of Life Sciences, Tohoku University, 2-1-1 Katahira, Aoba-ku, Sendai 980-8577, Japan.
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24
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Abstract
A concise total synthesis of (-)-exiguolide has been completed in an overall 2.8% yield over 20 steps in the longest linear path. The key strategies involve (1) Prins cyclization/homobromination of dienyl alcohol with the B ring-substituted aldehyde, prepared by Prins cyclization/bromination, to construct the A ring with excellent cis-Z stereochemical control and (2) an unusual side chain installation/macrocyclization strategy featuring Sonogashira cross-coupling followed by a ring-closing metathesis reaction to deliver the target.
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Affiliation(s)
- Zhigao Zhang
- Key Laboratory of Drug-Targeting of Education Ministry and Department of Medicinal Chemistry, West China School of Pharmacy, ‡State Key Laboratory of Biotherapy, West China Hospital, Sichuan University , Chengdu 610041, P. R. China
| | - Hengmu Xie
- Key Laboratory of Drug-Targeting of Education Ministry and Department of Medicinal Chemistry, West China School of Pharmacy, ‡State Key Laboratory of Biotherapy, West China Hospital, Sichuan University , Chengdu 610041, P. R. China
| | - Hongze Li
- Key Laboratory of Drug-Targeting of Education Ministry and Department of Medicinal Chemistry, West China School of Pharmacy, ‡State Key Laboratory of Biotherapy, West China Hospital, Sichuan University , Chengdu 610041, P. R. China
| | - Lu Gao
- Key Laboratory of Drug-Targeting of Education Ministry and Department of Medicinal Chemistry, West China School of Pharmacy, ‡State Key Laboratory of Biotherapy, West China Hospital, Sichuan University , Chengdu 610041, P. R. China
| | - Zhenlei Song
- Key Laboratory of Drug-Targeting of Education Ministry and Department of Medicinal Chemistry, West China School of Pharmacy, ‡State Key Laboratory of Biotherapy, West China Hospital, Sichuan University , Chengdu 610041, P. R. China
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25
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Murai T, Maekawa Y, Hirai Y, Kuwabara K, Minoura M. Phosphonoselenoic acid esters from the reaction between phosphoroselenoyl chlorides and Grignard reagents: synthetic and stereochemical aspects. RSC Adv 2016. [DOI: 10.1039/c6ra00318d] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022] Open
Abstract
Substitution reactions between a phosphoroselenoyl chloride and Grignard reagents proceeded smoothly at the phosphorus atom to furnish phosphonoselenoic acid esters in moderate to high yields.
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Affiliation(s)
- Toshiaki Murai
- Department of Chemistry and Biomolecular Science
- Faculty of Engineering
- Gifu University
- Gifu 501-1193
- Japan
| | - Yuuki Maekawa
- Department of Chemistry and Biomolecular Science
- Faculty of Engineering
- Gifu University
- Gifu 501-1193
- Japan
| | - Yuuki Hirai
- Department of Chemistry and Biomolecular Science
- Faculty of Engineering
- Gifu University
- Gifu 501-1193
- Japan
| | - Kazuma Kuwabara
- Department of Chemistry and Biomolecular Science
- Faculty of Engineering
- Gifu University
- Gifu 501-1193
- Japan
| | - Mao Minoura
- Department of Chemistry
- College of Science
- Rikkyo University
- Toshima-ku
- Japan
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26
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Larsen EM, Wilson MR, Taylor RE. Conformation-activity relationships of polyketide natural products. Nat Prod Rep 2015; 32:1183-206. [PMID: 25974024 PMCID: PMC4443481 DOI: 10.1039/c5np00014a] [Citation(s) in RCA: 40] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Abstract
Polyketides represent an important class of secondary metabolites that interact with biological targets connected to a variety of disease-associated pathways. Remarkably, nature's assembly lines, polyketide synthases, manufacture these privileged structures through a combinatorial mixture of just a few structural units. This review highlights the role of these structural elements in shaping a polyketide's conformational preferences, the use of computer-based molecular modeling and solution NMR studies in the identification of low-energy conformers, and the importance of conformational analogues in probing the bound conformation. In particular, this review covers several examples wherein conformational analysis complements classic structure-activity relationships in the design of biologically active natural product analogues.
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Affiliation(s)
- Erik M Larsen
- University of Notre Dame, Department of Chemistry & Biochemistry, 250 Nieuwland Science Hall, Notre Dame, Indiana, USA.
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27
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Tsui GC, Liu L, List B. Die organokatalytische asymmetrische Prins-Cyclisierung. Angew Chem Int Ed Engl 2015. [DOI: 10.1002/ange.201500219] [Citation(s) in RCA: 46] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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28
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Tsui GC, Liu L, List B. The Organocatalytic Asymmetric Prins Cyclization. Angew Chem Int Ed Engl 2015; 54:7703-6. [DOI: 10.1002/anie.201500219] [Citation(s) in RCA: 130] [Impact Index Per Article: 14.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/09/2015] [Revised: 03/25/2015] [Indexed: 01/25/2023]
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29
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McDonald BR, Scheidt KA. Pyranone natural products as inspirations for catalytic reaction discovery and development. Acc Chem Res 2015; 48:1172-83. [PMID: 25742935 DOI: 10.1021/ar5004576] [Citation(s) in RCA: 32] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Natural products continue to provide a wealth of opportunities in the areas of chemical and therapeutic development. These structures are effective measuring sticks for the current state of chemical synthesis as a field and constantly inspire new approaches and strategies. Tetrahydropryans and tetrahydropyran-4-ones are found in numerous bioactive marine natural products and medicinal compounds. Our interest in exploring the therapeutic potential of natural products containing these motifs provided the impetus to explore new methods to access highly functionalized, chiral pyran molecules in the most direct and rapid fashion possible. This goal led to exploration and development of a Lewis acid-mediated Prins reaction between a chiral β-hydroxy-dioxinone and aldehyde to produce a pyran-dioxinone fused product that can be processed in a single pot operation to the desired tetrahydropyran-4-ones in excellent yield and stereoselectivity. Although the Prins reaction is a commonly employed approach toward pyrans, this method uniquely provides a 3-carboxy-trisubstituted pyran and utilizes dioxinones in a manner that was underexplored at the time. The 3-carboxy substituent served as a key synthetic handhold when this method was applied to the synthesis of highly functionalized pyrans within the macrocyclic natural products neopeltolide, okilactiomycin, and exiguolide. When employed in challenging macrocyclizations, this tetrahydropyranone forming reaction proved highly stereoselective and robust. Another major thrust in our lab has been the synthesis of benzopyranone natural products, specifically flavonoids, because this broad and diverse family of compounds possesses an equally broad range of biological and medicinal applications. With the goal of developing a broad platform toward the synthesis of enantioenriched flavonoid analogs and natural products, a biomimetic, asymmetric catalytic approach toward the synthesis of 2-aryl benzopyranones was developed. A bifunctional hydrogen bonding/Brønstead base catalyst was ultimately found to enable this transformation in analogous manner to the biosynthesis via the enzyme chalcone isomerase. Employing thiourea catalysts derived from the pseudoenantiomeric quinine and quinidine, alkylidene β-ketoesters can be isomerized to 3-carboxy flavanones and decarboxylated in a single pot operation to stereodivergently provide highly enantioenriched flavanones in excellent yield. This method was applied to the synthesis of the abyssinone family of natural products, as well as the rotenoid, deguelin. An analogous method to isomerize chalcones was developed and applied to the synthesis of isosilybin A. In both of these related endeavors, the need for novel enabling methodologies toward the efficient creation of targeted molecular complexity drove the discovery, development and deployment of these stereoselective catalytic transformations.
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Affiliation(s)
- Benjamin R. McDonald
- Department
of Chemistry,
Department of Pharmacology, and Center for Molecular Innovation and
Drug Discovery, Northwestern University, 2145 Sheridan Road, Evanston, Illinois 60208, United States
| | - Karl A. Scheidt
- Department
of Chemistry,
Department of Pharmacology, and Center for Molecular Innovation and
Drug Discovery, Northwestern University, 2145 Sheridan Road, Evanston, Illinois 60208, United States
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30
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Liu P, Chen L, Toh JKC, Ang YL, Jee JE, Lim J, Lee SS, Lee SG. Tailored chondroitin sulfate glycomimetics via a tunable multivalent scaffold for potentiating NGF/TrkA-induced neurogenesis. Chem Sci 2015; 6:450-456. [PMID: 28694940 PMCID: PMC5485393 DOI: 10.1039/c4sc02553a] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/22/2014] [Accepted: 10/15/2014] [Indexed: 11/21/2022] Open
Abstract
The challenges inherent in the synthesis of large glycosaminoglycan (GAG) polysaccharides have made chemically accessible multivalent glycoligands a valuable tool in the field of GAG mimetics. However, the difficulty of positioning sulfated sugar motifs at desired sites has hindered efforts to precisely tailor their biofunctions. Here, we achieved precise orientation of sulfated disaccharide motifs by taking advantage of a structurally well-defined polyproline scaffold, and describe systematic explorations into the importance of the spatial arrangement of sulfated sugars along the scaffold backbone in designing multivalent glycoligands. Our protein binding studies demonstrate that the specific conformational display of pendant sugars is central to direct their multivalent interactions with NGF. By employing computational modeling and cellular studies, we have further applied this approach to engineer NGF-mediated signaling by regulating the NGF/TrkA complexation process, leading to enhanced neuronal differentiation and neurite outgrowth of PC12 cells. Our findings offer a promising strategy for the pinpoint engineering of GAG-mediated biological processes and a novel method of designing new therapeutic agents that are highly specific to GAG-associated disease.
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Affiliation(s)
- Pei Liu
- Institute of Bioengineering and Nanotechnology , 31 Biopolis Way, The Nanos , Singapore 138669 , Singapore . ; ; Tel: +65 6824 7131
| | - Liwei Chen
- Institute of Bioengineering and Nanotechnology , 31 Biopolis Way, The Nanos , Singapore 138669 , Singapore . ; ; Tel: +65 6824 7131
| | - Jerry K C Toh
- Institute of Bioengineering and Nanotechnology , 31 Biopolis Way, The Nanos , Singapore 138669 , Singapore . ; ; Tel: +65 6824 7131
| | - Yi Li Ang
- Institute of Bioengineering and Nanotechnology , 31 Biopolis Way, The Nanos , Singapore 138669 , Singapore . ; ; Tel: +65 6824 7131
| | - Joo-Eun Jee
- Institute of Bioengineering and Nanotechnology , 31 Biopolis Way, The Nanos , Singapore 138669 , Singapore . ; ; Tel: +65 6824 7131
| | - Jaehong Lim
- Institute of Bioengineering and Nanotechnology , 31 Biopolis Way, The Nanos , Singapore 138669 , Singapore . ; ; Tel: +65 6824 7131
| | - Su Seong Lee
- Institute of Bioengineering and Nanotechnology , 31 Biopolis Way, The Nanos , Singapore 138669 , Singapore . ; ; Tel: +65 6824 7131
| | - Song-Gil Lee
- Institute of Bioengineering and Nanotechnology , 31 Biopolis Way, The Nanos , Singapore 138669 , Singapore . ; ; Tel: +65 6824 7131
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31
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Li H, Xie H, Zhang Z, Xu Y, Lu J, Gao L, Song Z. Total synthesis of (−)-exiguolide via an organosilane-based strategy. Chem Commun (Camb) 2015; 51:8484-7. [PMID: 25891134 DOI: 10.1039/c5cc02448j] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
An organosilane-based strategy has been used to accomplish the total synthesis of (–)-exiguolide. The key steps involve: (1) geminal bis(silyl) Prins cyclization to construct the A ring; (2) silicon-protected RCM reaction to construct the macrocycle; and (3) Hiyama–Denmark cross-coupling to install the side chain.
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Affiliation(s)
- Hongze Li
- Key Laboratory of Drug-Targeting and Drug Delivery System of the Education Ministry
- West China School of Pharmacy
- Sichuan University
- Chengdu
- China
| | - Hengmu Xie
- Key Laboratory of Drug-Targeting and Drug Delivery System of the Education Ministry
- West China School of Pharmacy
- Sichuan University
- Chengdu
- China
| | - Zhigao Zhang
- Key Laboratory of Drug-Targeting and Drug Delivery System of the Education Ministry
- West China School of Pharmacy
- Sichuan University
- Chengdu
- China
| | - Yongjin Xu
- Key Laboratory of Drug-Targeting and Drug Delivery System of the Education Ministry
- West China School of Pharmacy
- Sichuan University
- Chengdu
- China
| | - Ji Lu
- Key Laboratory of Drug-Targeting and Drug Delivery System of the Education Ministry
- West China School of Pharmacy
- Sichuan University
- Chengdu
- China
| | - Lu Gao
- Key Laboratory of Drug-Targeting and Drug Delivery System of the Education Ministry
- West China School of Pharmacy
- Sichuan University
- Chengdu
- China
| | - Zhenlei Song
- Key Laboratory of Drug-Targeting and Drug Delivery System of the Education Ministry
- West China School of Pharmacy
- Sichuan University
- Chengdu
- China
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32
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Cox N, Dang H, Whittaker AM, Lalic G. NHC–copper hydrides as chemoselective reducing agents: catalytic reduction of alkynes, alkyl triflates, and alkyl halides. Tetrahedron 2014. [DOI: 10.1016/j.tet.2014.04.004] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
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33
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Bai Y, Davis DC, Dai M. Synthesis of Tetrahydropyran/Tetrahydrofuran‐Containing Macrolides by Palladium‐Catalyzed Alkoxycarbonylative Macrolactonizations. Angew Chem Int Ed Engl 2014. [DOI: 10.1002/ange.201403006] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Yu Bai
- Department of Chemistry, Purdue University, 560 Oval Drive, West Lafayette, IN 47907 (USA) http://www.chem.purdue.edu/dai/
| | - Dexter C. Davis
- Department of Chemistry, Purdue University, 560 Oval Drive, West Lafayette, IN 47907 (USA) http://www.chem.purdue.edu/dai/
| | - Mingji Dai
- Department of Chemistry, Purdue University, 560 Oval Drive, West Lafayette, IN 47907 (USA) http://www.chem.purdue.edu/dai/
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34
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Bai Y, Davis DC, Dai M. Synthesis of tetrahydropyran/tetrahydrofuran-containing macrolides by palladium-catalyzed alkoxycarbonylative macrolactonizations. Angew Chem Int Ed Engl 2014; 53:6519-22. [PMID: 24825410 DOI: 10.1002/anie.201403006] [Citation(s) in RCA: 41] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/04/2014] [Indexed: 11/08/2022]
Abstract
A novel Pd-catalyzed cascade alkoxycarbonylative macrolactonization to construct tetrahydropyran/tetrahydrofuran-containing bridged macrolactones in one step from alkendiols is described. Products with various ring sizes and substituents were obtained. Challenging macrolactones involving tertiary alcohols were synthesized smoothly as well. Mechanistically, experimental evidence to support a trans-oxypalladation step has been provided. The method was applied to the synthesis of potent anticancer compound 9-demethylneopeltolide.
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Affiliation(s)
- Yu Bai
- Department of Chemistry, Purdue University, 560 Oval Drive, West Lafayette, IN 47907 (USA) http://www.chem.purdue.edu/dai/
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35
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Gao L, Lu J, Song Z. Recent efforts to construct the B-ring of bryostatins. Chem Commun (Camb) 2014; 49:10211-20. [PMID: 24051556 DOI: 10.1039/c3cc45947k] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Among macrocyclic natural products, bryostatins have excellent bioactivities and unique structures that make them highly attractive to synthetic chemists. Particularly challenging for the total synthesis of bryostatins is the B-ring, which features a cis-tetrahydropyran containing a geometrically defined exocyclic Z-methyl enoate. Synthetic chemists have recently displayed great prowess in their efforts to construct this ring, and here we summarize the progress towards this goal.
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Affiliation(s)
- Lu Gao
- Key Laboratory of Drug-Targeting and Drug Delivery System of the Education Ministry, Department of Medicinal Chemistry, West China School of Pharmacy, Sichuan University, Chengdu, 610041, China.
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36
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Dang H, Cox N, Lalic G. Copper-Catalyzed Reduction of Alkyl Triflates and Iodides: An Efficient Method for the Deoxygenation of Primary and Secondary Alcohols. Angew Chem Int Ed Engl 2013. [DOI: 10.1002/ange.201307697] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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37
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Dang H, Cox N, Lalic G. Copper-Catalyzed Reduction of Alkyl Triflates and Iodides: An Efficient Method for the Deoxygenation of Primary and Secondary Alcohols. Angew Chem Int Ed Engl 2013; 53:752-6. [DOI: 10.1002/anie.201307697] [Citation(s) in RCA: 44] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/02/2013] [Indexed: 11/06/2022]
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38
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Zeng J, Tan YJ, Ma J, Leow ML, Tirtorahardjo D, Liu XW. Facile access to cis-2,6-disubstituted tetrahydropyrans by palladium-catalyzed decarboxylative allylation: total syntheses of (±)-centrolobine and (+)-decytospolides A and B. Chemistry 2013; 20:405-9. [PMID: 24285699 DOI: 10.1002/chem.201303328] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/25/2013] [Indexed: 11/08/2022]
Abstract
cis-2,6-Tetrahydropyran is an important structural skeleton of bioactive natural products. A facile synthesis of cis-2,6-disubstituted-3,6-dihydropyrans as cis-2,6-tetrahydropyran precursors has been achieved in high regio- and stereoselectivity with high yields. This reaction involves a palladium-catalyzed decarboxylative allylation of various 3,4-dihydro-2H-pyran substrates. Extending this reaction to 1,2-unsaturated carbohydrates allowed the achievement of challenging β-C-glycosylation. Based on this methodology, the total syntheses of (±)-centrolobine and (+)-decytospolides A and B were achieved in concise steps and overall high yields.
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Affiliation(s)
- Jing Zeng
- Division of Chemistry and Biological Chemistry, School of Physical and Mathematical Sciences, Nanyang Technological University, Singapore 637371
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39
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Lombardo VM, Thomas CD, Scheidt KA. A Tandem Isomerization/Prins Strategy: Iridium(III)/Brønsted Acid Cooperative Catalysis. Angew Chem Int Ed Engl 2013. [DOI: 10.1002/ange.201306462] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
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40
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Lombardo VM, Thomas CD, Scheidt KA. A tandem isomerization/prins strategy: iridium(III)/Brønsted acid cooperative catalysis. Angew Chem Int Ed Engl 2013; 52:12910-4. [PMID: 24218144 DOI: 10.1002/anie.201306462] [Citation(s) in RCA: 62] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/24/2013] [Indexed: 02/03/2023]
Abstract
Working together: A mild and efficient isomerization/protonation sequence generates pyran-fused indoles by cooperative catalysis between cationic iridium(III) and Bi(OTf)3 . Three distinct cyclization manifolds lead to the corresponding bioactive scaffolds in good yields. In addition, N-substituted indoles can be synthesized enantioselectively in the presence of a chiral phosphate.
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Affiliation(s)
- Vince M Lombardo
- Department of Chemistry, Center for Molecular Innovation and Drug Discovery, Chicago Tri-Institutional Center for Chemical Methods and Library Development (CT-CMLD), Northwestern University, 2145 Sheridan Road, Evanston, IL 60208 (USA)
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41
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Farmer RL, Scheidt KA. A Concise Enantioselective Synthesis and Cytotoxic Evaluation of the Anticancer Rotenoid Deguelin Enabled by a Tandem Knoevenagel/Conjugate Addition/Decarboxylation Sequence. Chem Sci 2013; 4:3304-3309. [PMID: 24101971 DOI: 10.1039/c3sc50424g] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
(-)-Deguelin is a rotenoid natural product that possesses significant potential as a chemopreventive and chemotherapeutic agent. While several racemic syntheses of deguelin have been reported, a formal evaluation of the anticancer activity of both the natural and unnatural enantiomers remains lacking. We describe herein the successful application of a flexible and selective thiourea-catalyzed cyclization strategy toward the enantioselective total synthesis of deguelin, which allows access to either stereoisomer for biological studies. The synthesis was completed in six steps (longest linear) with no protecting groups. The evaluation of both enantiomers of the natural product demonstrated potent inhibition of several cancer cell lines by these compounds, but interestingly showed that the unnatural (+)-deguelin preferentially inhibited the growth of MCF-7 breast cancer and HepG2 liver carcinoma cells when compared to the natural product.
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Affiliation(s)
- Rebecca L Farmer
- Department of Chemistry, Center for Molecular Innovation and Drug Discovery, Chemistry of Life Processes Institute, Northwestern University, 2145 Sheridan Road, Evanston, IL 60208, USA
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42
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Fuwa H, Mizunuma K, Sasaki M, Suzuki T, Kubo H. Total synthesis and biological evaluation of (−)-exiguolide analogues: importance of the macrocyclic backbone. Org Biomol Chem 2013; 11:3442-50. [DOI: 10.1039/c3ob40131f] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
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43
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Zheng K, Liu X, Qin S, Xie M, Lin L, Hu C, Feng X. Completely OH-Selective FeCl3-Catalyzed Prins Cyclization: Highly Stereoselective Synthesis of 4-OH-Tetrahydropyrans. J Am Chem Soc 2012; 134:17564-73. [DOI: 10.1021/ja3062002] [Citation(s) in RCA: 78] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Ke Zheng
- Key Laboratory of Green Chemistry
& Technology,
Ministry of Education, College of Chemistry, Sichuan University, Chengdu 610064, People’s Republic
of China
| | - Xiaohua Liu
- Key Laboratory of Green Chemistry
& Technology,
Ministry of Education, College of Chemistry, Sichuan University, Chengdu 610064, People’s Republic
of China
| | - Song Qin
- Key Laboratory of Green Chemistry
& Technology,
Ministry of Education, College of Chemistry, Sichuan University, Chengdu 610064, People’s Republic
of China
| | - Mingsheng Xie
- Key Laboratory of Green Chemistry
& Technology,
Ministry of Education, College of Chemistry, Sichuan University, Chengdu 610064, People’s Republic
of China
| | - Lili Lin
- Key Laboratory of Green Chemistry
& Technology,
Ministry of Education, College of Chemistry, Sichuan University, Chengdu 610064, People’s Republic
of China
| | - Changwei Hu
- Key Laboratory of Green Chemistry
& Technology,
Ministry of Education, College of Chemistry, Sichuan University, Chengdu 610064, People’s Republic
of China
| | - Xiaoming Feng
- Key Laboratory of Green Chemistry
& Technology,
Ministry of Education, College of Chemistry, Sichuan University, Chengdu 610064, People’s Republic
of China
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44
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Cui J, Chai DI, Miller C, Hao J, Thomas C, Wang J, Scheidt KA, Kozmin SA. Assembly of four diverse heterocyclic libraries enabled by Prins cyclization, Au-catalyzed enyne cycloisomerization, and automated amide synthesis. J Org Chem 2012; 77:7435-70. [PMID: 22860634 DOI: 10.1021/jo301061r] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
Abstract
We describe a unified synthetic strategy for efficient assembly of four new heterocyclic libraries. The synthesis began by creating a range of structurally diverse pyrrolidinones or piperidinones. Such compounds were obtained in a simple one-flask operation starting with readily available amines, ketoesters, and unsaturated anhydrides. The use of tetrahydropyran-containing ketoesters, which were rapidly assembled by our Prins cyclization protocol, enabled efficient fusion of pyran and piperidinone cores. A newly developed Au(I)-catalyzed cycloisomerization of alkyne-containing enamides further expanded heterocyclic diversity by providing rapid entry into a wide range of bicyclic and tricyclic dienamides. The final stage of the process entailed diversification of each of the initially produced carboxylic acids using a fully automated platform for amide synthesis, which delivered 1872 compounds in high diastereomeric and chemical purity.
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Affiliation(s)
- Jiayue Cui
- Chicago Tri-Institutional Center for Chemical Methods and Library Development, Department of Chemistry, University of Chicago, Chicago, Illinois 60637, USA
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45
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Cook C, Liron F, Guinchard X, Roulland E. Study of the total synthesis of (-)-exiguolide. J Org Chem 2012; 77:6728-42. [PMID: 22849583 DOI: 10.1021/jo301066p] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
In this article, we disclose the various routes and strategies we had to explore before finally achieving the total synthesis of (-)-exiguolide ((-)-1). Two first types of approaches were set, both relying on the Trost's domino ene-yne coupling/oxa-Michael reaction that we choose for its ability to control the geometry of the methylacrylate-bearing tetrahydropyrane ring B. In our first approach, we expected to assemble the two main fragments (C14-C21 and C1-C13) by creating the C13-C14 bond through a palladium(0)-catalyzed cross-coupling, but this step failed, unfortunately. In the second approach, which was more linear, we created the C16-C17 bond through condensation of a lithium acetylide on a Weinreb amide, and we assembled the C1-C5 and C6-C21 subunits through Trost's domino ene-yne coupling/oxa-Michael reaction. These two approaches served us to design an ameliorated third strategy, which finally led to the total synthesis of (-)-exiguolide.
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Affiliation(s)
- Cyril Cook
- Centre de Recherche de Gif, Institut de Chimie des Substances Naturelle, CNRS, Avenue de la Terrasse, 91198, Gif-sur-Yvette, France
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Lu J, Song Z, Zhang Y, Gan Z, Li H. Prins Cyclization of Bis(silyl) Homoallylic Alcohols to Form 2,6-cis-Tetrahydropyrans Containing a Geometrically Defined Exocyclic Vinylsilane: Efficient Synthesis of Ring B of the Bryostatins. Angew Chem Int Ed Engl 2012; 51:5367-70. [DOI: 10.1002/anie.201201323] [Citation(s) in RCA: 61] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/17/2012] [Indexed: 11/08/2022]
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Lu J, Song Z, Zhang Y, Gan Z, Li H. Prins Cyclization of Bis(silyl) Homoallylic Alcohols to Form 2,6-cis-Tetrahydropyrans Containing a Geometrically Defined Exocyclic Vinylsilane: Efficient Synthesis of Ring B of the Bryostatins. Angew Chem Int Ed Engl 2012. [DOI: 10.1002/ange.201201323] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
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Fuwa H. Total Synthesis of Tetrahydropyran-Containing Natural Products Exploiting Intramolecular Oxa-Conjugate Cyclization. HETEROCYCLES 2012. [DOI: 10.3987/rev-12-730] [Citation(s) in RCA: 55] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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Clarisse D, Pelotier B, Piva O, Fache F. Green chemistry: solvent- and metal-free Prins cyclization. Application to sequential reactions. Chem Commun (Camb) 2012; 48:157-9. [DOI: 10.1039/c1cc16501a] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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