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A unified strategy for the total syntheses of eribulin and a macrolactam analogue of halichondrin B. Proc Natl Acad Sci U S A 2022; 119:e2208938119. [PMID: 35930662 PMCID: PMC9371655 DOI: 10.1073/pnas.2208938119] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023] Open
Abstract
A unified synthetic route for the total syntheses of eribulin and a macrolactam analog of halichondrin B is described. The key to the success of the current synthetic approach includes the employment of our reverse approach for the construction of cyclic ether structural motifs and a modified intramolecular cyclization reaction between alkyl iodide and aldehyde functionalities to establish the all-carbon macrocyclic framework of eribulin. These syntheses, together with our previous work on the total syntheses of halichondrin B and norhalichondrin B, demonstrate and validate the powerful reverse approach in the construction of cyclic ether structural motifs. On the other hand, the unified synthetic strategy for the synthesis of the related macrolactam analog provides inspiration and opportunities in the halichondrin field and related polycyclic ether areas.
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Naturally Occurring Oxazole Structural Units as Ligands of Vanadium Catalysts for Ethylene-Norbornene (Co)polymerization. Catalysts 2021. [DOI: 10.3390/catal11080923] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
Abstract
1,3-Oxazole and 4,5-dihydro-1,3-oxazole are common structural motifs in naturally occurring peptides. A series of vanadium complexes were synthesized using VCl3(THF)3 and methyl substituted (4,5-dihydro-1,3-oxazol-2-yl)-1,3-oxazoles as ligands and analyzed using NMR and MS methods. The complexes were found to be active catalysts both in ethylene polymerization and ethylene-norbornene copolymerization. The position of methyl substituent in the ligand has considerable impact on the performance of (co)polymerization reaction, as well as on the microstructure, and thus physical properties of the obtained copolymers.
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Bauer JO, Espinosa‐Jalapa NA, Fontana N, Götz T, Falk A. Functional Group Variation in
tert
‐Butyldiphenylsilanes (TBDPS): Syntheses, Reactivities, and Effects on the Intermolecular Interaction Pattern in the Molecular Crystalline State. Eur J Inorg Chem 2021. [DOI: 10.1002/ejic.202100342] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Affiliation(s)
- Jonathan O. Bauer
- Institut für Anorganische Chemie Fakultät für Chemie und Pharmazie Universität Regensburg Universitätsstraße 31 93053 Regensburg Germany
| | - Noel Angel Espinosa‐Jalapa
- Institut für Anorganische Chemie Fakultät für Chemie und Pharmazie Universität Regensburg Universitätsstraße 31 93053 Regensburg Germany
| | - Nicolò Fontana
- Institut für Anorganische Chemie Fakultät für Chemie und Pharmazie Universität Regensburg Universitätsstraße 31 93053 Regensburg Germany
| | - Tobias Götz
- Institut für Anorganische Chemie Fakultät für Chemie und Pharmazie Universität Regensburg Universitätsstraße 31 93053 Regensburg Germany
| | - Alexander Falk
- Institut für Anorganische Chemie Fakultät für Chemie und Pharmazie Universität Regensburg Universitätsstraße 31 93053 Regensburg Germany
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Highly efficient and enantioselective syntheses of (2S,3R)-3-alkyl- and alkenylglutamates from Fmoc-protected Garner's aldehyde. Amino Acids 2020; 52:987-998. [PMID: 32621203 DOI: 10.1007/s00726-020-02868-7] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/24/2020] [Accepted: 06/25/2020] [Indexed: 02/06/2023]
Abstract
A 6-step enantioselective synthesis of (2S,3R)-3-alkyl/alkenylglutamates, including the biologically significant amino acid, (2S,3R)-3-methylglutamate, protected for Fmoc SPPS, is reported. Overall yields range from 52-65%. Key to the success of these syntheses was the development of a high-yielding 2-step synthesis of Fmoc Garner's aldehyde followed by a Horner-Wadsworth-Emmons reaction to give the corresponding Fmoc Garner's enoate in a 94% yield. The diastereoselective 1,4-addition of lithium dialkylcuprates to the Fmoc Garner's enoate was explored. Significant decomposition occurred when using lithium diethylcuprate and conditions previously reported for the 1,4-addition of lithium dialkylcuprates to Boc or Cbz-protected Garner's enoate. An optimization study of this reaction resulted in a robust set of conditions that addressed the shortcomings of previously reported conditions. Under these conditions, highly diastereoselective (> 20:1 in most cases) 1,4-addition reactions of lithium dialkyl/dialkenylcuprates to the Fmoc Garner's enoate were achieved in 76-99% yield. The resulting 1,4-addition products were easily converted into the Fmoc-(2S,3R)-3-alkyl/alkenylglutamates in two steps.
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Kita M, Watanabe S, Oka H, Kigoshi H. Synthesis of the trisoxazole macrolactone of mycalolides via template-directed E-selective ring-closing metathesis. Tetrahedron Lett 2018. [DOI: 10.1016/j.tetlet.2018.08.058] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
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6
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Slobodyanyuk EY, Artamonov OS, Kulik IB, Rusanov E, Volochnyuk DM, Grygorenko OO. A bio-inspired approach to proline-derived 2,4-disubstituted oxazoles. HETEROCYCL COMMUN 2018. [DOI: 10.1515/hc-2017-0235] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
Abstract
Abstract
A convenient four-step approach to the synthesis of (S)-4-alkyl-2-(pyrrolidin-2-yl)oxazoles starting from l-Boc-proline inspired by naturally occurring oxazole-containing peptidomimetics is described. The key step is the cyclization of 1-Boc-N-(1-oxoalkan-2-yl)pyrrolidine-2-carboxamides – aldehyde intermediates which demonstrate low to moderate stability – under Appel reaction conditions. This method furnishes the target compounds with more than 98% ee and in a 17–51% overall yield and has been used at up to a 45-g scale.
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Affiliation(s)
- Evgeniy Y. Slobodyanyuk
- Institute of Organic Chemistry, National Academy of Sciences of Ukraine , Kyiv 02660 , Ukraine
| | - Oleksiy S. Artamonov
- Institute of Organic Chemistry, National Academy of Sciences of Ukraine , Kyiv 02660 , Ukraine
| | - Irene B. Kulik
- Institute of Bioorganic Chemistry and Petrochemistry, National Academy of Sciences of Ukraine , Kyiv 02660 , Ukraine
| | - Eduard Rusanov
- Institute of Organic Chemistry, National Academy of Sciences of Ukraine , Kyiv 02660 , Ukraine
| | - Dmitriy M. Volochnyuk
- Institute of Organic Chemistry, National Academy of Sciences of Ukraine , Kyiv 02660 , Ukraine
| | - Oleksandr O. Grygorenko
- National Taras Shevchenko University of Kyiv , Volodymyrska Street, 64 , Kyiv 01601 , Ukraine
- Enamine Ltd. , Chervonotkatska 78 , Kyiv 02094 , Ukraine
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7
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Gattu R, Basha RS, Bagdi PR, Khan AT. One-pot three-component regioselective synthesis of C1-functionalised 3-arylbenzo[f]quinoline. RSC Adv 2016. [DOI: 10.1039/c5ra23413a] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
An efficient method for regioselective synthesis of C1-functionalised 3-arylbenzo[f]quinoline has been demonstrated using β-ketoester, 2-naphthylamine and aromatic aldehyde by employing camphorsulfonic acid as the catalyst in acetonitrile at 70 °C.
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Affiliation(s)
- Radhakrishna Gattu
- Department of Chemistry
- Indian Institute of Technology Guwahati
- Guwahati 781 039
- India
| | - R. Sidick Basha
- Department of Chemistry
- Indian Institute of Technology Guwahati
- Guwahati 781 039
- India
| | - Prasanta Ray Bagdi
- Department of Chemistry
- Indian Institute of Technology Guwahati
- Guwahati 781 039
- India
| | - Abu T. Khan
- Department of Chemistry
- Indian Institute of Technology Guwahati
- Guwahati 781 039
- India
- Vice-Chancellor
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Kita M, Oka H, Usui A, Ishitsuka T, Mogi Y, Watanabe H, Tsunoda M, Kigoshi H. Total Synthesis of Mycalolides A and B through Olefin Metathesis. Angew Chem Int Ed Engl 2015. [DOI: 10.1002/ange.201507795] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Masaki Kita
- Graduate School of Pure and Applied Sciences, University of Tsukuba, 1‐1‐1 Tennodai, Tsukuba 305‐8571 (Japan)
| | - Hirotaka Oka
- Graduate School of Pure and Applied Sciences, University of Tsukuba, 1‐1‐1 Tennodai, Tsukuba 305‐8571 (Japan)
| | - Akihiro Usui
- Graduate School of Pure and Applied Sciences, University of Tsukuba, 1‐1‐1 Tennodai, Tsukuba 305‐8571 (Japan)
| | - Tomoya Ishitsuka
- Graduate School of Pure and Applied Sciences, University of Tsukuba, 1‐1‐1 Tennodai, Tsukuba 305‐8571 (Japan)
| | - Yuzo Mogi
- Graduate School of Pure and Applied Sciences, University of Tsukuba, 1‐1‐1 Tennodai, Tsukuba 305‐8571 (Japan)
| | - Hidekazu Watanabe
- Graduate School of Pure and Applied Sciences, University of Tsukuba, 1‐1‐1 Tennodai, Tsukuba 305‐8571 (Japan)
| | - Masaki Tsunoda
- Graduate School of Pure and Applied Sciences, University of Tsukuba, 1‐1‐1 Tennodai, Tsukuba 305‐8571 (Japan)
| | - Hideo Kigoshi
- Graduate School of Pure and Applied Sciences, University of Tsukuba, 1‐1‐1 Tennodai, Tsukuba 305‐8571 (Japan)
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Kita M, Oka H, Usui A, Ishitsuka T, Mogi Y, Watanabe H, Tsunoda M, Kigoshi H. Total Synthesis of Mycalolides A and B through Olefin Metathesis. Angew Chem Int Ed Engl 2015; 54:14174-8. [DOI: 10.1002/anie.201507795] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/20/2015] [Indexed: 11/09/2022]
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10
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Romero-Estudillo I, Batchu VR, Boto A. One-Pot Conversion of Amino Acids into 2,5-Disubstituted Oxazoles: No Metals Needed. Adv Synth Catal 2014. [DOI: 10.1002/adsc.201400496] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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11
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Best D, Lam HW. C═N-Containing Azaarenes as Activating Groups in Enantioselective Catalysis. J Org Chem 2013; 79:831-45. [DOI: 10.1021/jo402414k] [Citation(s) in RCA: 112] [Impact Index Per Article: 10.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Affiliation(s)
- Daniel Best
- EaStCHEM, School of Chemistry, University of Edinburgh, Joseph Black Building, The King’s Buildings,
West Mains Road, Edinburgh EH9 3JJ, United Kingdom
- School of Chemistry, University of Nottingham, University Park, Nottingham NG7 2RD, United Kingdom
| | - Hon Wai Lam
- EaStCHEM, School of Chemistry, University of Edinburgh, Joseph Black Building, The King’s Buildings,
West Mains Road, Edinburgh EH9 3JJ, United Kingdom
- School of Chemistry, University of Nottingham, University Park, Nottingham NG7 2RD, United Kingdom
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Shah SR, Navathe SS, Dikundwar AG, Guru Row TN, Vasella AT. Thermal Rearrangement of Azido Ketones into Oxazoles via Azirines: One-Pot, Metal-Free Heteroannulation to Functionalized 1,3-Oxazoles. European J Org Chem 2012. [DOI: 10.1002/ejoc.201201269] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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Davyt D, Serra G. Thiazole and oxazole alkaloids: isolation and synthesis. Mar Drugs 2010; 8:2755-80. [PMID: 21139843 PMCID: PMC2996175 DOI: 10.3390/md8112755] [Citation(s) in RCA: 137] [Impact Index Per Article: 9.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/17/2010] [Revised: 10/27/2010] [Accepted: 11/04/2010] [Indexed: 12/22/2022] Open
Abstract
Thiazoles, oxazole and their corresponding reduced derivatives, thiazolines and oxazolines, are found in marine sources exhibiting significant biological activities. The isolation, synthetic, and biological studies of these natural products, covering literature from January 2007 to June 2010, are summarized.
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Affiliation(s)
- Danilo Davyt
- *Authors to whom correspondence should be addressed; E-Mails: (D.D.); (G.S.); Tel.: +598 2 9290290; Fax: +598 2 9241906
| | - Gloria Serra
- *Authors to whom correspondence should be addressed; E-Mails: (D.D.); (G.S.); Tel.: +598 2 9290290; Fax: +598 2 9241906
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16
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Bauder C. Asymmetric Synthesis of the C1-C13 Fragment of the Marine Metabolite Bistramide K. European J Org Chem 2010. [DOI: 10.1002/ejoc.201000881] [Citation(s) in RCA: 12] [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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17
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Zhang J, Polishchuk EA, Chen J, Ciufolini MA. Development of an oxazole conjunctive reagent and application to the total synthesis of siphonazoles. J Org Chem 2010; 74:9140-51. [PMID: 19950882 DOI: 10.1021/jo9018705] [Citation(s) in RCA: 33] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
The preparation of 4-carbethoxy-5-methyl-2-(phenylsulfonyl)methyloxazole and its use in the elaboration of more complex oxazoles are described. A total synthesis of the unique natural products siphonazoles A and B, illustrates an application of this building block. A discussion of the biological activity of the siphonazoles is also presented.
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Affiliation(s)
- Jianmin Zhang
- Department of Chemistry, University of British Columbia, 2036 Main Mall, Vancouver BC V6T 1Z1, Canada
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Blunt JW, Copp BR, Munro MHG, Northcote PT, Prinsep MR. Marine natural products. Nat Prod Rep 2010; 27:165-237. [DOI: 10.1039/b906091j] [Citation(s) in RCA: 322] [Impact Index Per Article: 23.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
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Hoffman TJ, Dash J, Rigby JH, Arseniyadis S, Cossy J. Enantioselective Organocatalytic Conjugate Reduction of β-Azole-Containing α,β-Unsaturated Aldehydes. Org Lett 2009; 11:2756-9. [DOI: 10.1021/ol900893e] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
Affiliation(s)
- Thomas J. Hoffman
- Laboratoire de Chimie Organique, ESPCI ParisTech, CNRS, 10 rue Vauquelin, F-75231 Paris Cedex 05, France
| | - Jyotirmayee Dash
- Laboratoire de Chimie Organique, ESPCI ParisTech, CNRS, 10 rue Vauquelin, F-75231 Paris Cedex 05, France
| | - James H. Rigby
- Laboratoire de Chimie Organique, ESPCI ParisTech, CNRS, 10 rue Vauquelin, F-75231 Paris Cedex 05, France
| | - Stellios Arseniyadis
- Laboratoire de Chimie Organique, ESPCI ParisTech, CNRS, 10 rue Vauquelin, F-75231 Paris Cedex 05, France
| | - Janine Cossy
- Laboratoire de Chimie Organique, ESPCI ParisTech, CNRS, 10 rue Vauquelin, F-75231 Paris Cedex 05, France
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Abstract
The first total synthesis of somocystinamide A, a disulfide dimer with extremely labile enamide functional groups, was accomplished in a concise and stereospecific manner. Somocystinamide A is reported to possess exceptionally potent antiangiogenic and tumoricidal activities. The current work should enable further pharmacological investigation of this important natural product.
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Affiliation(s)
- Takashi L Suyama
- Scripps Institution of Oceanography and Skaggs School of Pharmacy and Pharmaceutical Sciences, University of California at San Diego, 9500 Gilman Drive, La Jolla, California 92093, USA
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Pattenden G, Rescourio G. A new synthetic approach to (+)-lactacystin based on radical cyclisation of enantiopure α-ethynyl substituted serine derivatives to 4-methylenepyrrolidinones. Org Biomol Chem 2008; 6:3428-38. [DOI: 10.1039/b806681g] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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23
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Mulholland NP, Pattenden G, Walters IAS. A concise and straightforward total synthesis of (±)-salinosporamide A, based on a biosynthesis model. Org Biomol Chem 2008; 6:2782-9. [DOI: 10.1039/b803818j] [Citation(s) in RCA: 36] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Deeley J, Bertram A, Pattenden G. Novel polyoxazole-based cyclopeptides from Streptomyces sp. Total synthesis of the cyclopeptide YM-216391 and synthetic studies towards telomestatin. Org Biomol Chem 2008; 6:1994-2010. [DOI: 10.1039/b802477d] [Citation(s) in RCA: 44] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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