1
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Hu L, Zhao J. Ynamide Coupling Reagents: Origin and Advances. Acc Chem Res 2024; 57:855-869. [PMID: 38452397 PMCID: PMC10956395 DOI: 10.1021/acs.accounts.3c00743] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/25/2023] [Revised: 02/16/2024] [Accepted: 02/20/2024] [Indexed: 03/09/2024]
Abstract
Since the pioneering work of Curtius and Fischer, chemical peptide synthesis has witnessed a century's development and evolved into a routine technology. However, it is far from perfect. In particular, it is challenged by sustainable development because the state-of-the-art of peptide synthesis heavily relies on legacy reagents and technologies developed before the establishment of green chemistry. Over the past three decades, a broad range of efforts have been made for greening peptide synthesis, among which peptide synthesis using unprotected amino acid represents an ideal and promising strategy because it does not require protection and deprotection steps. Unfortunately, C → N peptide synthesis employing unprotected amino acids has been plagued by undesired polymerization, while N → C inverse peptide synthesis with unprotected amino acids is retarded by severe racemization/epimerization owing to the iterative activation and aminolysis of high racemization/epimerization susceptible peptidyl acids. Consequently, there is an urgent need to develop innovative coupling reagents and strategies with novel mechanisms that can address the long-standing notorious racemization/epimerization issue of peptide synthesis.This Account will describe our efforts in discovery of ynamide coupling reagents and their application in greening peptide synthesis. Over an eight-year journey, ynamide coupling reagents have evolved into a class of general coupling reagents for both amide and ester bond formation. In particular, the superiority of ynamide coupling reagents in suppressing racemization/epimerization enabled them to be effective for peptide fragment condensation, and head-to-tail cyclization, as well as precise incorporation of thioamide substitutions into peptide backbones. The first practical inverse peptide synthesis using unprotected amino acids was successfully accomplished by harnessing such features and taking advantage of a transient protection strategy. Ynamide coupling reagent-mediated ester bond formation enabled efficient intermolecular esterification and macrolactonization with preservation of α-chirality and the configuration of the conjugated α,β-C-C double bond. To make ynamide coupling reagents readily available with reasonable cost and convenience, we have developed a scalable one-step synthetic method from cheap starting materials. Furthermore, a water-removable ynamide coupling reagent was developed, offering a column-free purification of the target coupling product. In addition, the recycle of ynamide coupling reagent was accomplished, thereby paving the way for their sustainable industrial application.As such, this Account presents the whole story of the origin, mechanistic insights, preparation, synthetic applications, and recycle of ynamide coupling reagents with a perspective that highlights their future impact on peptide synthesis.
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Affiliation(s)
- Long Hu
- Affiliated Cancer Hospital, Guangdong
Provincial Key Laboratory of Major Obstetric Diseases, School of Pharmaceutical
Sciences, Guangzhou Medical University, Guangzhou, 511436, China
| | - Junfeng Zhao
- Affiliated Cancer Hospital, Guangdong
Provincial Key Laboratory of Major Obstetric Diseases, School of Pharmaceutical
Sciences, Guangzhou Medical University, Guangzhou, 511436, China
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2
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Nalawade SA, Singh M, Puneeth Kumar DRGKR, Dey S, Gopi HN. Stereoselective synthesis of backbone extended π-conjugated amino esters. Org Biomol Chem 2023; 21:2586-2595. [PMID: 36880876 DOI: 10.1039/d3ob00090g] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/05/2023]
Abstract
Utilization of the Wittig reaction to synthesize conjugative multiple double bonds is rare. We examined the utility of the Wittig reaction to construct conjugative two and three carbon-carbon double bonds on the N-protected amino acid backbone. The ethyl esters of N-Boc amino acids with multiple carbon-carbon double bonds in the backbone were isolated in excellent yields with exceptional E-selectivity of the double bonds. The allylic alcohols of α,β-unsaturated γ-amino esters were selectively synthesized from the DIBAL-H and BF3·OEt2. The allylic alcohols were transformed into aldehydes using IBX oxidation. Using this protocol, we synthesized ethyl esters of N-Boc-(E,E)-α,β,γ,δ-unsaturated ε-amino acids with various side-chain functionalities and ethyl esters of N-Boc-(E,E,E)-α,β,γ,δ,ε,ζ-unsaturated η-amino acids with excellent yields. We speculated the exceptional E-selectivity is probably due to the stabilization of the planar transition state of the Wittig reaction with the double bond p-orbitals. No racemization was observed in the synthesis of amino acids. The reported process may serve as an excellent route to synthesize multiple conjugative carbon-carbon double bonds.
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Affiliation(s)
- Sachin A Nalawade
- Department of Chemistry, Indian Institute of Science Education and Research, Dr Homi Bhabha Road, Pashan, Pune-411 008, India.
| | - Manjeet Singh
- Department of Chemistry, Indian Institute of Science Education and Research, Dr Homi Bhabha Road, Pashan, Pune-411 008, India.
| | - DRGKoppalu R Puneeth Kumar
- Department of Chemistry, Indian Institute of Science Education and Research, Dr Homi Bhabha Road, Pashan, Pune-411 008, India.
| | - Sanjit Dey
- Department of Chemistry, Indian Institute of Science Education and Research, Dr Homi Bhabha Road, Pashan, Pune-411 008, India.
| | - Hosahudya N Gopi
- Department of Chemistry, Indian Institute of Science Education and Research, Dr Homi Bhabha Road, Pashan, Pune-411 008, India.
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3
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Dethe DH, Kumar V, Beeralingappa NC, Mishra KB, Nirpal AK. Synthesis of Polyene Bioactive Natural Products: FR252921 and Vitamin A. Org Lett 2022; 24:2203-2207. [PMID: 35274951 DOI: 10.1021/acs.orglett.2c00546] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
A formal synthesis of FR252921, a potent macrocyclic immunosuppressive agent, and a six-step synthesis of vitamin A have been demonstrated. The application of a ruthenium-catalyzed step-economic and environmentally benign strategy for the highly stereo- and chemoselective construction of valuable polyene motifs of FR252921 and vitamin A highlights the syntheses. The key features for the synthesis FR252921 include preparation of the triene moiety followed by two consecutive peptide couplings of the three fragments.
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Affiliation(s)
- Dattatraya H Dethe
- Department of Chemistry, Indian Institute of Technology Kanpur, Kanpur 208016, India
| | - Vimlesh Kumar
- Department of Chemistry, Indian Institute of Technology Kanpur, Kanpur 208016, India
| | | | - Kunj B Mishra
- Department of Chemistry, Indian Institute of Technology Kanpur, Kanpur 208016, India
| | - Appasaheb K Nirpal
- Department of Chemistry, Indian Institute of Technology Kanpur, Kanpur 208016, India
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4
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Saridakis I, Kaiser D, Maulide N. Unconventional Macrocyclizations in Natural Product Synthesis. ACS CENTRAL SCIENCE 2020; 6:1869-1889. [PMID: 33274267 PMCID: PMC7706100 DOI: 10.1021/acscentsci.0c00599] [Citation(s) in RCA: 17] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 05/11/2020] [Indexed: 06/12/2023]
Abstract
Over the past several decades, macrocyclic compounds have emerged as increasingly significant therapeutic candidates in drug discovery. Their pharmacological activity hinges on their rotationally restricted three-dimensional orientation, resulting in a unique conformational preorganization and a high enthalpic gain as a consequence of high-affinity macrocycle-protein binding interactions. Synthetic access to macrocyclic drug candidates is therefore crucial. From a synthetic point of view, the efficiency of macrocyclization events commonly suffers from entropic penalties as well as undesired intermolecular couplings (oligomerization). Although over the past several decades ring-closing metathesis, macrolactonization, or macrolactamization have become strategies of choice, the toolbox of organic synthesis provides a great number of versatile transformations beyond the aforementioned. This Outlook focuses on a selection of examples employing what we term unconventional macrocyclizations toward the synthesis of natural products or analogues.
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Affiliation(s)
- Iakovos Saridakis
- Institute
of Organic Chemistry, University of Vienna, Währinger Strasse 38, 1090 Vienna, Austria
| | - Daniel Kaiser
- Institute
of Organic Chemistry, University of Vienna, Währinger Strasse 38, 1090 Vienna, Austria
| | - Nuno Maulide
- Institute
of Organic Chemistry, University of Vienna, Währinger Strasse 38, 1090 Vienna, Austria
- Research
Platform for Next Generation Macrocycles, Währinger Strasse 38, 1090 Vienna, Austria
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5
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Abstract
Penostatins A and C are cytotoxic natural products that show promising selective inhibitory activity against PTP1B. Here the first asymmetric total syntheses of (+)-penostatins A and C are reported. Our strategy features (i) a new method for the synthesis of 6-alkyl-3-hydroxy-2-pyrones, (ii) a cascade involving the intramolecular Diels-Alder reaction of 2-pyrone and a retro-hetero-Diels-Alder (decarboxylation) reaction, (iii) Ando-Horner-Wadsworth-Emmons olefination/lactonization, and (iv) selenoxide elimination. Our study confirmed the absolute configurations of penostatins A and C and laid the groundwork for further bioactivity studies.
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Affiliation(s)
- Jian Wang
- Department of Chemistry and Hong Kong Branch of the Guangdong Southern Marine Science and Engineering Laboratory (Guangzhou), The Hong Kong University of Science and Technology, Clearwater Bay, Kowloon, Hong Kong, China
| | - Miguel Adrián Márquez-Cadena
- Department of Chemistry and Hong Kong Branch of the Guangdong Southern Marine Science and Engineering Laboratory (Guangzhou), The Hong Kong University of Science and Technology, Clearwater Bay, Kowloon, Hong Kong, China
| | - Rongbiao Tong
- Department of Chemistry and Hong Kong Branch of the Guangdong Southern Marine Science and Engineering Laboratory (Guangzhou), The Hong Kong University of Science and Technology, Clearwater Bay, Kowloon, Hong Kong, China
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6
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Affiliation(s)
- Ming Yang
- College of Chemistry and Chemical Engineering, Jiangxi Normal University, Nanchang, 330022, Jiangxi P. R. China
| | - Xuewei Wang
- College of Chemistry and Chemical Engineering, Jiangxi Normal University, Nanchang, 330022, Jiangxi P. R. China
| | - Junfeng Zhao
- College of Chemistry and Chemical Engineering, Jiangxi Normal University, Nanchang, 330022, Jiangxi P. R. China
- School of Pharmaceutical Sciences, Guangzhou Medical University, Guangzhou, 511436, Guangdong P. R. China
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7
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Chen Y, Coussanes G, Souris C, Aillard P, Kaldre D, Runggatscher K, Kubicek S, Di Mauro G, Maryasin B, Maulide N. A Domino 10-Step Total Synthesis of FR252921 and Its Analogues, Complex Macrocyclic Immunosuppressants. J Am Chem Soc 2019; 141:13772-13777. [PMID: 31436963 PMCID: PMC6837725 DOI: 10.1021/jacs.9b07185] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
![]()
FR252921, FR252922,
and FR256523 are a family of potent macrocyclic
polyene immunosuppressive agents with a novel mode of action. However,
the lack of an efficient and flexible synthesis has hindered further
biological studies, mostly due to the fact that the natural products
appear to be kinetic isomers regarding the triene moiety. Herein,
we report the development and application of an unprecedented, unique
domino Suzuki–Miyaura/4π-electrocyclic ring-opening macrocyclization,
resulting in a concise, unified, and stereoselective synthetic route
to these complex targets in only 10 steps. This in turn enables ready
access to a range of unnatural analogues, among which several compounds
showed inhibition of T-lymphocyte proliferation at levels equal or
superior to those of the natural products themselves.
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Affiliation(s)
- Yong Chen
- Institute of Organic Chemistry , University of Vienna , Währinger Strasse 38 , 1090 Vienna , Austria
| | - Guilhem Coussanes
- Institute of Organic Chemistry , University of Vienna , Währinger Strasse 38 , 1090 Vienna , Austria
| | - Caroline Souris
- Institute of Organic Chemistry , University of Vienna , Währinger Strasse 38 , 1090 Vienna , Austria
| | - Paul Aillard
- Institute of Organic Chemistry , University of Vienna , Währinger Strasse 38 , 1090 Vienna , Austria
| | - Dainis Kaldre
- Institute of Organic Chemistry , University of Vienna , Währinger Strasse 38 , 1090 Vienna , Austria
| | - Kathrin Runggatscher
- CeMM Research Center for Molecular Medicine , Austrian Academy of Sciences , Lazarettgasse 14, AKH BT 25.3 , 1090 Vienna , Austria
| | - Stefan Kubicek
- CeMM Research Center for Molecular Medicine , Austrian Academy of Sciences , Lazarettgasse 14, AKH BT 25.3 , 1090 Vienna , Austria
| | - Giovanni Di Mauro
- Institute of Organic Chemistry , University of Vienna , Währinger Strasse 38 , 1090 Vienna , Austria
| | - Boris Maryasin
- Institute of Organic Chemistry , University of Vienna , Währinger Strasse 38 , 1090 Vienna , Austria.,Institute of Theoretical Chemistry , University of Vienna , Währinger Strasse 17 , 1090 Vienna , Austria
| | - Nuno Maulide
- Institute of Organic Chemistry , University of Vienna , Währinger Strasse 38 , 1090 Vienna , Austria.,CeMM Research Center for Molecular Medicine , Austrian Academy of Sciences , Lazarettgasse 14, AKH BT 25.3 , 1090 Vienna , Austria
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8
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Ghosh AK, Rodriguez S. An enantioselective synthesis of the C3-C21 segment of the macrolide immunosuppressive agent FR252921. Tetrahedron Lett 2016; 57:2884-2887. [PMID: 27818534 DOI: 10.1016/j.tetlet.2016.05.067] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
Abstract
An enantioselective synthesis of the C3-C21 segment of the novel immunosuppressant FR252921 is described. The C12 and C13 stereogenic centers were constructed by a non-aldol process utilizing optically active 4-phenylbutyrolactone. The C18 stereogenic center was installed using Braun's highly diastereoselective acetate aldol reaction. Other key steps involved Curtius rearrangement and Horner-Wadsworth-Emmons olefination reactions.
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Affiliation(s)
- Arun K Ghosh
- Department of Chemistry and Department of Medicinal Chemistry, Purdue University, 560 Oval Drive, West Lafayette, Indiana 47907, United States
| | - Samuel Rodriguez
- Department of Chemistry and Department of Medicinal Chemistry, Purdue University, 560 Oval Drive, West Lafayette, Indiana 47907, United States
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9
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Koukal P, Ulč J, Nečas D, Kotora M. Enantioselective Allylation of β-Haloacrylaldehydes: Formal Total Syntheses of Pteroenone and Antillatoxin. European J Org Chem 2016. [DOI: 10.1002/ejoc.201600286] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
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10
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Tanaka S, Yamamura T, Nakane S, Kitamura M. Catalytic dehydrogenative N-((triisopropylsilyl)oxy)carbonyl (Tsoc) protection of amines using iPr3SiH and CO2. Chem Commun (Camb) 2015; 51:13110-2. [DOI: 10.1039/c5cc04594k] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Heterogeneous Pd/C efficiently catalyzes the dehydrogenative N-((triisopropylsilyl)oxy)carbonyl (Tsoc) protection of amines using iPr3SiH and CO2 without the liberation of any salts.
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Affiliation(s)
- S. Tanaka
- Graduate School of Pharmaceutical Sciences
- Graduate School of Science
- and Research Center for Materials Science
- Nagoya University
- Chikusa
| | - T. Yamamura
- Graduate School of Pharmaceutical Sciences
- Graduate School of Science
- and Research Center for Materials Science
- Nagoya University
- Chikusa
| | - S. Nakane
- Graduate School of Pharmaceutical Sciences
- Graduate School of Science
- and Research Center for Materials Science
- Nagoya University
- Chikusa
| | - M. Kitamura
- Graduate School of Pharmaceutical Sciences
- Graduate School of Science
- and Research Center for Materials Science
- Nagoya University
- Chikusa
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11
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Sosa Carrizo ED, Fernández I, Martín SE. Computational Study on the C–Heteroatom Bond Formation via Stille Cross-Coupling Reaction: Differences between Organoheterostannanes Me3SnAsPh2 vs Me3SnPPh2. Organometallics 2014. [DOI: 10.1021/om501027s] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
Affiliation(s)
- E. Daiann Sosa Carrizo
- Departamento
de Química Orgánica, Facultad de Ciencias Químicas, INFIQC (CONICET−Universidad Nacional de Córdoba), Medina Allende y Haya de la Torre, X5000HUA, Córdoba, Argentina
| | - Israel Fernández
- Departamento
Química Orgánica I, Facultad de Ciencias Químicas, Universidad Complutense Madrid, 28040, Madrid, Spain
| | - Sandra E. Martín
- Departamento
de Química Orgánica, Facultad de Ciencias Químicas, INFIQC (CONICET−Universidad Nacional de Córdoba), Medina Allende y Haya de la Torre, X5000HUA, Córdoba, Argentina
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12
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Parenty A, Moreau X, Niel G, Campagne JM. Update 1 of: Macrolactonizations in the Total Synthesis of Natural Products. Chem Rev 2013; 113:PR1-40. [DOI: 10.1021/cr300129n] [Citation(s) in RCA: 148] [Impact Index Per Article: 13.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Affiliation(s)
- A. Parenty
- Institut de Chimie des Substances
Naturelles, Avenue de la Terrasse, F-91198 Gif sur Yvette, France
| | - X. Moreau
- Institut de Chimie des Substances
Naturelles, Avenue de la Terrasse, F-91198 Gif sur Yvette, France
- Institut Lavoisier de Versailles, UMR CNRS 8180, Université de Versailles-Saint-Quentin-en-Yvelines, 45 Avenue des Etats-Unis, 78035 Versailles Cedex, France
| | - Gilles Niel
- Institut Charles Gerhardt, UMR5253, Ecole Nationale Supérieure de Chimie, 8 rue de l’Ecole Normale, F-34296 Montpellier, France
| | - J.-M. Campagne
- Institut de Chimie des Substances
Naturelles, Avenue de la Terrasse, F-91198 Gif sur Yvette, France
- Institut Charles Gerhardt, UMR5253, Ecole Nationale Supérieure de Chimie, 8 rue de l’Ecole Normale, F-34296 Montpellier, France
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13
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Yadav JS, Sengupta S. The Formal Total Synthesis of FR252921 - An Immunosuppressant. European J Org Chem 2012. [DOI: 10.1002/ejoc.201201097] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
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14
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Lee K, Kim H, Hong J. N-Heterocyclic Carbene Catalyzed Oxidative Macrolactonization: Total Synthesis of (+)-Dactylolide. Angew Chem Int Ed Engl 2012; 51:5735-8. [DOI: 10.1002/anie.201201653] [Citation(s) in RCA: 76] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/29/2012] [Indexed: 11/08/2022]
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15
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Lee K, Kim H, Hong J. N-Heterocyclic Carbene Catalyzed Oxidative Macrolactonization: Total Synthesis of (+)-Dactylolide. Angew Chem Int Ed Engl 2012. [DOI: 10.1002/ange.201201653] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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16
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Affiliation(s)
- Kosuke Fujioka
- Graduate School of Pharmaceutical Sciences, The University of Tokushima, 1-78-1 Sho-machi, Tokushima 770-8505, Japan
| | - Hiromasa Yokoe
- Graduate School of Pharmaceutical Sciences, The University of Tokushima, 1-78-1 Sho-machi, Tokushima 770-8505, Japan
| | - Masahiro Yoshida
- Graduate School of Pharmaceutical Sciences, The University of Tokushima, 1-78-1 Sho-machi, Tokushima 770-8505, Japan
| | - Kozo Shishido
- Graduate School of Pharmaceutical Sciences, The University of Tokushima, 1-78-1 Sho-machi, Tokushima 770-8505, Japan
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17
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Zhuang S, Liu K, Li C. Stereoselective 6-Exo Cyclization of Amidyl Radicals. An Experimental and Theoretical Study. J Org Chem 2011; 76:8100-6. [DOI: 10.1021/jo2014406] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Shunjun Zhuang
- Key Laboratory of Synthetic Chemistry of Natural Substances, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, 345 Lingling Road, Shanghai 200032, P. R. China
| | - Kun Liu
- College of Chemistry, Tianjin Key Laboratory of Structure and Performance for Functional Molecule, Tianjin Normal University, Tianjin 300387, P. R. China
| | - Chaozhong Li
- Key Laboratory of Synthetic Chemistry of Natural Substances, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, 345 Lingling Road, Shanghai 200032, P. R. China
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Naber JR, Fors BP, Wu X, Gunn J, Buchwald SL. STILLE CROSS-COUPLING REACTIONS OF ARYL MESYLATES AND TOSYLATES USING A BIARYLPHOSPHINE BASED CATALYST SYSTEM. HETEROCYCLES 2010; 80:1215-1226. [PMID: 23596345 PMCID: PMC3626283 DOI: 10.3987/com-09-s(s)105] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
A catalyst system for the Stille cross-coupling reactions of aryl mesylates and tosylates is reported. Using the combination of Pd(OAc)2, XPhos, and CsF in t-BuOH an array of aryl and heteroaryl sulfonates were successfully employed in these reactions. Morever, heteroarylstannanes, such as furyl, thiophenyl, and N-methylpyrrole, which are often prone to decomposition, were efficiently coupled under these conditions. Ortho-substitution on the stannane coupling partner was well tolerated; however, the presence of ortho substituents on the aryl sulfonates greatly reduced the proficiency of these reactions.
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Affiliation(s)
- John R. Naber
- Department of Chemistry, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USA
| | - Brett P. Fors
- Department of Chemistry, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USA
| | - Xiaoxing Wu
- Department of Chemistry, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USA
| | - Jonathon Gunn
- Department of Chemistry, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USA
| | - Stephen L. Buchwald
- Department of Chemistry, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USA
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19
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Uenishi J, Iwamoto T, Tanaka J. Total synthesis of (-)-zampanolide and questionable existence of (-)-dactylolide as the elusive biosynthetic precursor of (-)-zampanolide in an Okinawan sponge. Org Lett 2009; 11:3262-5. [PMID: 19586001 DOI: 10.1021/ol901167g] [Citation(s) in RCA: 67] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
A new and concise total synthesis of (-)-zampanolide, (-)-1, and (-)-dactylolide, (-)-2, is described. Synthetic highlights include (i) a mild Horner-Wadsworth-Emmons reaction providing the seco acid, (ii) an unusual stepwise cross-coupling reaction of a 1,1-dibromodiene with inversion of olefin geometry, and (iii) specific O-Michael reaction conditions using catalytic LHMDS with TMEDA for the synthesis of functionalized 2,6-cis-tetrahydropyran. A marine sponge extract was analyzed for the presence of (-)-2 as the biosynthetic precursor of (-)-zampanolide.
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Affiliation(s)
- Jun'ichi Uenishi
- Kyoto Pharmaceutical University, Misasagi, Yamashina, Kyoto 607-8412 Japan.
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Amans D, Bellosta V, Cossy J. Synthesis of two bioactive natural products: FR252921 and pseudotrienic acid B. Chemistry 2009; 15:3457-73. [PMID: 19219867 DOI: 10.1002/chem.200802649] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
Concise and highly convergent syntheses of the immunosuppressive agent FR252921 and the related antimicrobial natural product pseudotrienic acid B were achieved from a common intermediate by using optically active titanium complexes to control the configuration of the stereogenic centers, a highly stereo- and regioselective cross-metathesis to generate the triene moieties, and a Stille cross-coupling to install the dienic units.
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Affiliation(s)
- Dominique Amans
- Laboratoire de Chimie Organique, ESPCI ParisTech, CNRS, 10 rue Vauquelin, 75231 Paris, France
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21
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Naber J, Buchwald S. Palladium-Catalyzed Stille Cross-Coupling Reaction of Aryl Chlorides using a Pre-Milled Palladium Acetate and XPhos Catalyst System. Adv Synth Catal 2008. [DOI: 10.1002/adsc.200800032] [Citation(s) in RCA: 87] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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22
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Shiina I, Ushiyama H, Yamada YK, Kawakita YI, Nakata K. 4-(Dimethylamino)pyridineN-oxide (DMAPO): An Effective Nucleophilic Catalyst in the Peptide Coupling Reaction with 2-Methyl-6-nitrobenzoic Anhydride. Chem Asian J 2008; 3:454-61. [DOI: 10.1002/asia.200700305] [Citation(s) in RCA: 29] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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23
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Shiina I, Miyao R. 2,6-Dimethyl-4-nitrobenzoic Anhydride (DMNBA): An Effective Coupling Reagent for the Synthesis of Carboxylic Esters and Lactones. HETEROCYCLES 2008. [DOI: 10.3987/com-08-s(n)96] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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