1
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Reddi RN, Sudalai A, Jo C. Studies toward the total synthesis of (+)‐neopeltolide using
N
‐heterocyclic carbene‐catalyzed oxo‐acyloxylation/reductive oxa‐Michael addition strategy. B KOREAN CHEM SOC 2022. [DOI: 10.1002/bkcs.12604] [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)
- Rambabu N. Reddi
- Chemical Engineering and Process Development Division CSIR‐National Chemical Laboratory Pune Maharashtra India
| | - Arumugam Sudalai
- Chemical Engineering and Process Development Division CSIR‐National Chemical Laboratory Pune Maharashtra India
| | - Changbum Jo
- Department of Chemistry and Chemical Engineering Inha University Michuhol‐gu, Incheon Republic of Korea
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2
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Zhao F, Lauder K, Liu S, Finnigan JD, Charnock SBR, Charnock SJ, Castagnolo D. Chemoenzymatic Cascades for the Enantioselective Synthesis of β-Hydroxysulfides Bearing a Stereocentre at the C-O or C-S Bond by Ketoreductases. Angew Chem Int Ed Engl 2022; 61:e202202363. [PMID: 35576553 DOI: 10.1002/anie.202202363] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/12/2022] [Indexed: 12/17/2022]
Abstract
Chiral β-hydroxysulfides are an important class of organic compounds which find broad application in organic and pharmaceutical chemistry. Herein we describe the development of novel biocatalytic and chemoenzymatic methods for the enantioselective synthesis of β-hydroxysulfides by exploiting ketoreductase (KRED) enzymes. Four KREDs were discovered from a pool of 384 enzymes identified and isolated through a metagenomic approach. KRED311 and KRED349 catalysed the synthesis of β-hydroxysulfides bearing a stereocentre at the C-O bond with opposite absolute configurations and excellent ee values by novel chemoenzymatic and biocatalytic-chemical-biocatalytic (bio-chem-bio) cascades starting from commercially available thiophenols/thiols and α-haloketones/alcohols. KRED253 and KRED384 catalysed the enantioselective synthesis of β-hydroxysulfides bearing a stereocentre at the C-S bond with opposite enantioselectivities by dynamic kinetic resolution (DKR) of racemic α-thioaldehydes.
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Affiliation(s)
- Fei Zhao
- School of Cancer and Pharmaceutical Sciences, King's College London, 150 Stamford Street, London, SE1 9NH, UK.,Department of Chemistry, University College London, 20 Gordon Street, London, WC1H 0AJ, UK
| | - Kate Lauder
- School of Cancer and Pharmaceutical Sciences, King's College London, 150 Stamford Street, London, SE1 9NH, UK
| | - Siyu Liu
- School of Cancer and Pharmaceutical Sciences, King's College London, 150 Stamford Street, London, SE1 9NH, UK
| | - James D Finnigan
- Prozomix Limited, West End Ind. Estate, Haltwhistle, Northumberland, NE49 9HA, UK
| | - Simon B R Charnock
- Prozomix Limited, West End Ind. Estate, Haltwhistle, Northumberland, NE49 9HA, UK
| | - Simon J Charnock
- Prozomix Limited, West End Ind. Estate, Haltwhistle, Northumberland, NE49 9HA, UK
| | - Daniele Castagnolo
- School of Cancer and Pharmaceutical Sciences, King's College London, 150 Stamford Street, London, SE1 9NH, UK.,Department of Chemistry, University College London, 20 Gordon Street, London, WC1H 0AJ, UK
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3
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Nakazato K, Oda M, Fuwa H. Total Synthesis of (+)-Neopeltolide by the Macrocyclization/Transannular Pyran Cyclization Strategy. Org Lett 2022; 24:4003-4008. [PMID: 35649194 DOI: 10.1021/acs.orglett.2c01429] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
An 11-step synthesis of (+)-neopeltolide was developed. The C1-C7 carboxylic acid and the C8-C16 alcohol were prepared, each in six steps, from (R)- and (S)-epichlorohydrin, respectively. After esterification, our tandem macrocyclization/transannular pyran cyclization strategy was applied to a stereocontrolled construction of the neopeltolide macrolactone. The side chain was synthesized in six steps from ethyl 4-oxazolecarboxylate through palladium-catalyzed cross-couplings. A Mitsunobu reaction of the neopeltolide macrolactone and the side chain completed the synthesis.
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Affiliation(s)
- Kazuki Nakazato
- 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
| | - 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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4
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Zhao F, Lauder K, Liu S, Finnigan JD, Charnock SBR, Charnock SJ, Castagnolo D. Chemoenzymatic Cascades for the Enantioselective Synthesis of β‐Hydroxysulfides Bearing a Stereocentre at C− O or C − S Bonds by Ketoreductases (KREDs). Angew Chem Int Ed Engl 2022. [DOI: 10.1002/ange.202202363] [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)
- Fei Zhao
- University College London Chemistry UNITED KINGDOM
| | - Kate Lauder
- King's College London Cancer and Pharmaceutical Sciences UNITED KINGDOM
| | - Siyu Liu
- King's College London Cancer and Pharmaceutical Sciences UNITED KINGDOM
| | | | | | | | - Daniele Castagnolo
- University College London Chemistry 20 Gordon Street WC1H 0AJ London UNITED KINGDOM
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5
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Schmidt JP, Breit B. Rhodium-Catalyzed Cyclization of Terminal and Internal Allenols: An Atom Economic and Highly Stereoselective Access Towards Tetrahydropyrans. Angew Chem Int Ed Engl 2020; 59:23485-23490. [PMID: 32940396 PMCID: PMC7756761 DOI: 10.1002/anie.202009166] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/02/2020] [Revised: 08/22/2020] [Indexed: 01/21/2023]
Abstract
A comprehensive study of a diastereoselective Rh-catalyzed cyclization of terminal and internal allenols is reported. The methodology allows the atom economic and highly syn-selective access to synthetically important 2,4-disubstituted and 2,4,6-trisubstituted tetrahydropyrans (THP). Furthermore, its utility and versatility are demonstrated by a great functional-group compatibility and the enantioselective total synthesis of (-)-centrolobine.
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Affiliation(s)
- Johannes P. Schmidt
- Institute for Organic ChemistryAlbert-Ludwigs-Universität FreiburgAlbertstraße 2179104Freiburg im BreisgauGermany
| | - Bernhard Breit
- Institute for Organic ChemistryAlbert-Ludwigs-Universität FreiburgAlbertstraße 2179104Freiburg im BreisgauGermany
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6
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Schmidt JP, Breit B. Rhodium‐Catalyzed Cyclization of Terminal and Internal Allenols: An Atom Economic and Highly Stereoselective Access Towards Tetrahydropyrans. Angew Chem Int Ed Engl 2020. [DOI: 10.1002/ange.202009166] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
Affiliation(s)
- Johannes P. Schmidt
- Institute for Organic Chemistry Albert-Ludwigs-Universität Freiburg Albertstraße 21 79104 Freiburg im Breisgau Germany
| | - Bernhard Breit
- Institute for Organic Chemistry Albert-Ludwigs-Universität Freiburg Albertstraße 21 79104 Freiburg im Breisgau Germany
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7
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Yanagi S, Sugai T, Noguchi T, Kawakami M, Sasaki M, Niwa S, Sugimoto A, Fuwa H. Fluorescence-labeled neopeltolide derivatives for subcellular localization imaging. Org Biomol Chem 2020; 17:6771-6776. [PMID: 31259993 DOI: 10.1039/c9ob01276a] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
Design, synthesis and functional analysis of fluorescent derivatives of neopeltolide, an antiproliferative marine macrolide, are reported herein. Live cell imaging using the fluorescent derivatives showed rapid cellular uptake and localization within the endoplasmic reticulum as well as the mitochondria.
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Affiliation(s)
- Shota Yanagi
- Graduate School of Life Sciences, Tohoku University, 2-1-1 Katahira, Aoba-ku, Sendai, Miyagi 980-8577, Japan
| | - Tomoya Sugai
- Department of Applied Chemistry, Faculty of Science and Engineering, Chuo University, 1-13-27 Kasuga, Bunkyo-ku, Tokyo 112-8551, Japan.
| | - Takuma Noguchi
- Graduate School of Life Sciences, Tohoku University, 2-1-1 Katahira, Aoba-ku, Sendai, Miyagi 980-8577, Japan
| | - Masato Kawakami
- Graduate School of Life Sciences, Tohoku University, 2-1-1 Katahira, Aoba-ku, Sendai, Miyagi 980-8577, Japan
| | - Makoto Sasaki
- Graduate School of Life Sciences, Tohoku University, 2-1-1 Katahira, Aoba-ku, Sendai, Miyagi 980-8577, Japan
| | - Shinsuke Niwa
- Frontier Research Institute for Interdisciplinary Sciences (FRIS), Tohoku University, 6-3 Aramaki Aoba, Aoba-ku, Sendai, Miyagi 980-0845, Japan
| | - Asako Sugimoto
- Graduate School of Life Sciences, Tohoku University, 2-1-1 Katahira, Aoba-ku, Sendai, Miyagi 980-8577, 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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9
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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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10
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Feng J, Kasun ZA, Krische MJ. Enantioselective Alcohol C-H Functionalization for Polyketide Construction: Unlocking Redox-Economy and Site-Selectivity for Ideal Chemical Synthesis. J Am Chem Soc 2016; 138:5467-78. [PMID: 27113543 PMCID: PMC4871165 DOI: 10.1021/jacs.6b02019] [Citation(s) in RCA: 125] [Impact Index Per Article: 15.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
The development and application of stereoselective and site-selective catalytic methods that directly convert lower alcohols to higher alcohols are described. These processes merge the characteristics of transfer hydrogenation and carbonyl addition, exploiting alcohols and π-unsaturated reactants as redox pairs, which upon hydrogen transfer generate transient carbonyl-organometal pairs en route to products of C-C coupling. Unlike classical carbonyl additions, stoichiometric organometallic reagents and discrete alcohol-to-carbonyl redox reactions are not required. Additionally, due to a kinetic preference for primary alcohol dehydrogenation, the site-selective modification of glycols and higher polyols is possible, streamlining or eliminating use of protecting groups. The total syntheses of several iconic type I polyketide natural products were undertaken using these methods. In each case, the target compounds were prepared in significantly fewer steps than previously achieved.
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Affiliation(s)
- Jiajie Feng
- University of Texas at Austin, Department of Chemistry, Austin, TX 78712, USA
| | - Zachary A. Kasun
- University of Texas at Austin, Department of Chemistry, Austin, TX 78712, USA
| | - Michael J. Krische
- University of Texas at Austin, Department of Chemistry, Austin, TX 78712, USA
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11
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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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12
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Chalopin T, Jebali K, Gaulon-Nourry C, Dénès F, Lebreton J, Mathé-Allainmat M. Regioselective dihydropyran formation from 4-iodo-2,6-disubstituted tetrahydropyran derivatives using In(OAc)3/LiI system as the promoter. Tetrahedron 2016. [DOI: 10.1016/j.tet.2015.11.046] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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13
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Hari TPA, Wilke BI, Davey JA, Boddy CN. Diastereoseletive Transannular Oxa-Conjugate Addition Generates the 2,6-cis-Disubstituted Tetrahydropyran of Neopeltolide. J Org Chem 2015; 81:415-23. [PMID: 26675500 DOI: 10.1021/acs.joc.5b02014] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
Transannular 2,6-disubstituted pyrans, like the one found in the cytotoxic marine natural product neopeltolide, are a key functional group in many polyketides. While oxa-conjugate additions have been shown to provide direct and rapid access to tetrahydropyrans in acyclic neopeltolide intermediates, a transannular strategy for construction of this ring system in a macrocyclic core has not been investigated. In this study, we demonstrate that a transannular oxa-conjugate addition strategy is a viable approach to the construction of the bicyclic core of neopeltolide. We show that transannular addition occurs readily with an α,β-unsaturated ketone as the Michael acceptor and does not occur when an α,β-unsaturated ester is the Michael acceptor. Our data indicates that oxa-conjugate addition is reversible and that the stereochemical outcome can be under thermodynamic control. Using computational chemistry, we show that the lowest energy diastereomer is the desired cis-pyran found in neopeltolide, and we experimentally demonstrate that the trans and cis diastereomers are interconvertible under reaction conditions with the cis-pyran product predominating. This oxa-conjugate addition strategy should provide a viable route to accessing the fully elaborated macrocyclic core of neopeltolide.
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Affiliation(s)
- Taylor P A Hari
- Department of Chemistry & Biomolecular Sciences, University of Ottawa , Ottawa, Ontario, Canada K1N 6N5
| | - Burkardt I Wilke
- Department of Chemistry, Syracuse University , Syracuse, New York 13244, United States
| | - James A Davey
- Department of Chemistry & Biomolecular Sciences, University of Ottawa , Ottawa, Ontario, Canada K1N 6N5
| | - Christopher N Boddy
- Department of Chemistry & Biomolecular Sciences, University of Ottawa , Ottawa, Ontario, Canada K1N 6N5
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14
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Mineeva IV. New approach to the synthesis of macrocyclic core of cytotoxic lactone (+)-neopeltolide. Synthesis of C7–C14 segment basing on cyclopropanol intermediates. RUSSIAN JOURNAL OF ORGANIC CHEMISTRY 2015. [DOI: 10.1134/s1070428015080023] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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15
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Vaquer AF, Frongia A, Secci F, Tuveri E. Disulfide-based metal-free α-sulfanylation of ketones. RSC Adv 2015. [DOI: 10.1039/c5ra17913k] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
An eco-friendly methodology for the direct α-sulfanylation of ketones has been developed by using diaryl disulfides as sulfanyl source affording ketosulfides in good to excellent yields and high selectivity.
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Affiliation(s)
- Andrea F. Vaquer
- Dipartimento di Scienze Chimiche e Geologiche
- Università degli Studi di Cagliari
- Complesso Universitario di Monserrato
- Monserrato
- ITALY
| | - Angelo Frongia
- Dipartimento di Scienze Chimiche e Geologiche
- Università degli Studi di Cagliari
- Complesso Universitario di Monserrato
- Monserrato
- ITALY
| | - Francesco Secci
- Dipartimento di Scienze Chimiche e Geologiche
- Università degli Studi di Cagliari
- Complesso Universitario di Monserrato
- Monserrato
- ITALY
| | - Enrica Tuveri
- Dipartimento di Scienze Chimiche e Geologiche
- Università degli Studi di Cagliari
- Complesso Universitario di Monserrato
- Monserrato
- ITALY
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16
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Bai Y, Dai M. Strategies and Methods for the Synthesis of Anticancer Natural Product Neopeltolide and its Analogs. CURR ORG CHEM 2015; 19:871-885. [PMID: 27182194 PMCID: PMC4863658 DOI: 10.2174/1385272819666150119225149] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
Neopeltolide, isolated in 2007, with its novel structural features and potent anti cancer cell proliferation activity, has attracted a tremendous amount of synthetic efforts. This review briefly and chronologically summarizes each of the synthesis with the main focus on the strategies and methodologies for the construction of its cis-tetrahydropyran-containing macrolactone core.
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Affiliation(s)
- Yu Bai
- Department of Chemistry and Center for Cancer Research, Purdue University, 720 Clinic Drive, West Lafayette, IN 47907, USA
| | - Mingji Dai
- Department of Chemistry and Center for Cancer Research, Purdue University, 720 Clinic Drive, West Lafayette, IN 47907, USA
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17
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Ketcham JM, Shin I, Montgomery TP, Krische MJ. Catalytic enantioselective C-H functionalization of alcohols by redox-triggered carbonyl addition: borrowing hydrogen, returning carbon. Angew Chem Int Ed Engl 2014; 53:9142-50. [PMID: 25056771 PMCID: PMC4150357 DOI: 10.1002/anie.201403873] [Citation(s) in RCA: 272] [Impact Index Per Article: 27.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2014] [Indexed: 12/12/2022]
Abstract
The use of alcohols and unsaturated reactants for the redox-triggered generation of nucleophile-electrophile pairs represents a broad, new approach to carbonyl addition chemistry. Discrete redox manipulations that are often required for the generation of carbonyl electrophiles and premetalated carbon-centered nucleophiles are thus avoided. Based on this concept, a broad, new family of enantioselective C-C coupling reactions that are catalyzed by iridium or ruthenium complexes have been developed, which are summarized in this Minireview.
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Affiliation(s)
- John M Ketcham
- University of Texas at Austin, Department of Chemistry and Biochemistry, 1 University Station - A5300, Austin, TX 78712-1167 (USA)
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18
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Ketcham JM, Shin I, Montgomery TP, Krische MJ. Katalytische enantioselektive C-H-Funktionalisierung von Alkoholen durch redoxgesteuerte Addition an die Carbonylgruppe: Wasserstoff-Ausleihe und Kohlenstoff-Rückgabe. Angew Chem Int Ed Engl 2014. [DOI: 10.1002/ange.201403873] [Citation(s) in RCA: 113] [Impact Index Per Article: 11.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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19
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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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20
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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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21
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Fuwa H, Noguchi T, Kawakami M, Sasaki M. Synthesis and biological evaluation of (+)-neopeltolide analogues: importance of the oxazole-containing side chain. Bioorg Med Chem Lett 2014; 24:2415-9. [PMID: 24792465 DOI: 10.1016/j.bmcl.2014.04.031] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/18/2014] [Revised: 04/08/2014] [Accepted: 04/09/2014] [Indexed: 12/22/2022]
Abstract
We describe the synthesis and biological evaluation of (+)-neopeltolide analogues with structural modifications in the oxazole-containing side chain. Evaluation of the antiproliferative activity of newly synthesized analogues against A549 human lung adenocarcinoma cells and PANC-1 human pancreatic carcinoma cells have shown that the C19-C20 and C26-C27 double bonds within the oxazole-containing side chain and the terminal methyl carbamate group are essential for potent activity.
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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.
| | - Takuma Noguchi
- Graduate School of Life Sciences, Tohoku University, 2-1-1 Katahira, Aoba-ku, Sendai 980-8577, Japan
| | - Masato Kawakami
- Graduate School of Life Sciences, Tohoku University, 2-1-1 Katahira, Aoba-ku, Sendai 980-8577, Japan
| | - Makoto Sasaki
- Graduate School of Life Sciences, Tohoku University, 2-1-1 Katahira, Aoba-ku, Sendai 980-8577, Japan
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22
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Nasir NM, Ermanis K, Clarke PA. Strategies for the construction of tetrahydropyran rings in the synthesis of natural products. Org Biomol Chem 2014; 12:3323-35. [PMID: 24744139 DOI: 10.1039/c4ob00423j] [Citation(s) in RCA: 118] [Impact Index Per Article: 11.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
This review focuses on the methodology used for the construction of tetrahydropyran (THP) rings in the synthesis of natural products over the last seven years. While methods like cyclisation onto oxocarbenium ions, reduction of cyclic hemi-ketals, Michael reactions, hetero-Diels-Alder cycloadditions and cyclisations onto epoxides continue to find application, several other strategies including metal-mediated cyclisations, ring-closing metathesis, radical cyclisations and carbocation cyclisations have also found use. This review is intended to provide an overview of the area for those who are unfamiliar, and to refresh and remind those who do work in the area of the exciting developments in the field.
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Affiliation(s)
- Nadiah Mad Nasir
- Department of Chemistry, University of York, Heslington, York, North Yorks YO10 5DD, UK.
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23
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Dechert-Schmitt AMR, Schmitt DC, Gao X, Itoh T, Krische MJ. Polyketide construction via hydrohydroxyalkylation and related alcohol C-H functionalizations: reinventing the chemistry of carbonyl addition. Nat Prod Rep 2014; 31:504-13. [PMID: 24514754 PMCID: PMC3954971 DOI: 10.1039/c3np70076c] [Citation(s) in RCA: 135] [Impact Index Per Article: 13.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
Despite the longstanding importance of polyketide natural products in human medicine, nearly all commercial polyketide-based drugs are prepared through fermentation or semi-synthesis. The paucity of manufacturing routes involving de novo chemical synthesis reflects the inability of current methods to concisely address the preparation of these complex structures. Direct alcohol C-H bond functionalization via"C-C bond forming transfer hydrogenation" provides a powerful, new means of constructing type I polyketides that bypasses stoichiometric use of chiral auxiliaries, premetallated C-nucleophiles, and discrete alcohol-to-aldehyde redox reactions. Using this emergent technology, total syntheses of 6-deoxyerythronolide B, bryostatin 7, trienomycins A and F, cyanolide A, roxaticin, and formal syntheses of rifamycin S and scytophycin C, were accomplished. These syntheses represent the most concise routes reported to any member of the respective natural product families.
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Affiliation(s)
- Anne-Marie R Dechert-Schmitt
- University of Texas at Austin, Department of Chemistry and Biochemistry, 105 E 24th St., Welch Hall A5300, Austin, TX 78712-1165, USA.
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Ghosh AK, Shurrush KA, Dawson ZL. Enantioselective total synthesis of macrolide (+)-neopeltolide. Org Biomol Chem 2013; 11:7768-77. [PMID: 24121457 DOI: 10.1039/c3ob41541d] [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]
Abstract
The asymmetric total synthesis of the anti-proliferative macrolide (+)-neopeltolide has been completed. The stereochemically defined trisubstituted tetrahydropyran ring was constructed via a catalytic hetero-Diels-Alder reaction creating two new chiral centers in a highly diastereoselective manner. The other key features of this synthesis included Brown's asymmetric allylation to install the requisite C-11 and C-13 stereocenters. The synthesis of the oxazole side chain consisted of a hydrozirconation of an alkynyl stannane to establish the Z stereochemistry, followed by a palladium catalyzed cross coupling to introduce the desired Z olefin in the oxazole side chain.
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Affiliation(s)
- Arun K Ghosh
- Department of Chemistry, Purdue University, 560 Oval Drive, West Lafayette, Indiana, USA.
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Fuwa H, Noto K, Kawakami M, Sasaki M. Synthesis and Biological Evaluation of Aspergillide A/Neopeltolide Chimeras. CHEM LETT 2013. [DOI: 10.1246/cl.130322] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/30/2023]
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Fuwa H, Kawakami M, Noto K, Muto T, Suga Y, Konoki K, Yotsu-Yamashita M, Sasaki M. Concise synthesis and biological assessment of (+)-neopeltolide and a 16-member stereoisomer library of 8,9-dehydroneopeltolide: identification of pharmacophoric elements. Chemistry 2013; 19:8100-10. [PMID: 23606326 DOI: 10.1002/chem.201300664] [Citation(s) in RCA: 39] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/20/2013] [Indexed: 02/01/2023]
Abstract
We describe herein a concise synthesis of (+)-neopeltolide, a marine macrolide natural product that elicits a highly potent antiproliferative activity against several human cancer cell lines. Our synthesis exploited the powerful bond-forming ability and high functional group compatibility of olefin metathesis and esterification reactions to minimize manipulations of oxygen functionalities and to maximize synthetic convergency. Our findings include a chemoselective olefin cross-metathesis reaction directed by H-bonding, and a ring-closing metathesis conducted under non-high dilution conditions. Moreover, we developed a 16-member stereoisomer library of 8,9-dehydroneopeltolide to systematically explore the stereostructure-activity relationships. Assessment of the antiproliferative activity of the stereoisomers against A549 human lung adenocarcinoma, MCF-7 human breast adenocarcinoma, HT-1080 human fibrosarcoma, and P388 murine leukemia cell lines has revealed marked differences in potency between the stereoisomers. This study provides comprehensive insights into the structure-activity relationship of this important antiproliferative agent, leading to the identification of the pharmacophoric structural elements and the development of truncated analogues with nanomolar potency.
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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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Athe S, Chandrasekhar B, Roy S, Pradhan TK, Ghosh S. Formal Total Synthesis of (+)-Neopeltolide. J Org Chem 2012; 77:9840-5. [DOI: 10.1021/jo301425c] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Affiliation(s)
- Sudhakar Athe
- CSIR-Indian Institute of Chemical Technology, Hyderabad 500007, India
| | | | - Saumya Roy
- CSIR-Indian Institute of Chemical Technology, Hyderabad 500007, India
| | | | - Subhash Ghosh
- CSIR-Indian Institute of Chemical Technology, Hyderabad 500007, India
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Saha P, Ghosh P, Sultana S, Saikia AK. Diastereoselective synthesis of substituted dihydropyrans via an oxonium–ene cyclization reaction. Org Biomol Chem 2012; 10:8730-8. [DOI: 10.1039/c2ob26088c] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Indukuri K, Bondalapati S, Sultana S, Saikia AK. Synthesis of 2,3-dihydro-4-pyranones from epoxides via intermolecular [4+2] cycloaddition reaction. RSC Adv 2012. [DOI: 10.1039/c2ra21468g] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
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