1
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Gavrilov KN, Chuchelkin IV, Firsin ID, Trunina VM, Gavrilov VK, Zheglov SV, Fedorov DA, Tafeenko VA, Zamilatskov IA, Zimarev VS, Goulioukina NS. TADDOL-based P, S-bidentate phosphoramidite ligands in palladium-catalyzed asymmetric allylic substitution. Org Biomol Chem 2024; 22:538-549. [PMID: 38111353 DOI: 10.1039/d3ob01891a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2023]
Abstract
A series of easy-to-prepare and modular chiral P,S-bidentate phosphoramidites were synthesized. With respect to Pd(II), these ligands showed the ability to form stable P,S-chelate allylic complexes. The structures of the ligands and their complexes were confirmed by 2D NMR spectroscopy and single-crystal X-ray diffraction. These chiral inducers provided up to 99% ee in the Pd-catalyzed asymmetric allylic substitution of (E)-1,3-diphenylallyl acetate with C- and N-nucleophiles and up to 94% ee in the Pd-mediated allylic alkylation of cinnamyl esters with β-ketoesters and 2,5-dimethylpyrrole. Furthermore, up to 92% ee with quantitative conversion and chemo- and regioselectivity was achieved in the rare reaction between 2-(diethoxyphosphoryl)-1-phenylallyl acetate and aniline. The effects of the structural parameters, reaction conditions and ligand-to-metal ratio on the catalytic results are discussed. It was shown that the ligands surpass their analogues with different denticity.
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Affiliation(s)
- Konstantin N Gavrilov
- Department of Chemistry, Ryazan State University named for S. Yesenin, 46 Svoboda Street, 390000 Ryazan, Russian Federation.
| | - Ilya V Chuchelkin
- Department of Chemistry, Ryazan State University named for S. Yesenin, 46 Svoboda Street, 390000 Ryazan, Russian Federation.
| | - Ilya D Firsin
- Department of Chemistry, Ryazan State University named for S. Yesenin, 46 Svoboda Street, 390000 Ryazan, Russian Federation.
| | - Valeria M Trunina
- Department of Chemistry, Ryazan State University named for S. Yesenin, 46 Svoboda Street, 390000 Ryazan, Russian Federation.
| | - Vladislav K Gavrilov
- Department of Chemistry, Ryazan State University named for S. Yesenin, 46 Svoboda Street, 390000 Ryazan, Russian Federation.
| | - Sergey V Zheglov
- Department of Chemistry, Ryazan State University named for S. Yesenin, 46 Svoboda Street, 390000 Ryazan, Russian Federation.
| | - Denis A Fedorov
- Department of General Physics, Moscow Institute of Physics and Technology, Institutskii per. 9, 141700 Dolgoprudny, Moscow Region, Russian Federation
| | - Victor A Tafeenko
- Department of Chemistry, M. V. Lomonosov Moscow State University, Leninskie Gory, GSP-1, 119991 Moscow, Russian Federation
| | - Ilya A Zamilatskov
- A. N. Frumkin Institute of Physical Chemistry and Electrochemistry, Russian Academy of Sciences, Leninsky Prospekt 31/4, 119071, Moscow, Russian Federation
| | - Vladislav S Zimarev
- Department of Chemistry, Ryazan State University named for S. Yesenin, 46 Svoboda Street, 390000 Ryazan, Russian Federation.
- Department of Chemistry, M. V. Lomonosov Moscow State University, Leninskie Gory, GSP-1, 119991 Moscow, Russian Federation
| | - Nataliya S Goulioukina
- Department of Chemistry, Ryazan State University named for S. Yesenin, 46 Svoboda Street, 390000 Ryazan, Russian Federation.
- Department of Chemistry, M. V. Lomonosov Moscow State University, Leninskie Gory, GSP-1, 119991 Moscow, Russian Federation
- A. N. Frumkin Institute of Physical Chemistry and Electrochemistry, Russian Academy of Sciences, Leninsky Prospekt 31/4, 119071, Moscow, Russian Federation
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2
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Intano J, Riel LP, Lim J, Robinson JR, Howell AR. 1,6-Dioxo-2-azaspiro[3.4]oct-2-enes and Related Spirocycles: Heterocycles from [3 + 2] Nitrile Oxide Cycloadditions with 2-Methyleneoxetanes, -Thietanes, and -Azetidines. J Org Chem 2023. [PMID: 38016079 DOI: 10.1021/acs.joc.3c01624] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2023]
Abstract
Isoxazolines and 4-membered heterocycles are significant structural motifs in numerous synthetic intermediates and natural products. [3 + 2] Cycloadditions between enol ethers and nitrile oxides have been well studied; however, nitrile oxide cycloadditions with 4-membered heterocycles to give spiroisoxazolines are unreported. Here, we showcase the regio- and diastereoselective [3 + 2] nitrile oxide cycloadditions of 2-methyleneoxetanes, -azetidines, and -thietanes to give an array of 1,6-dioxo-2-azaspiro[3.4]oct-2-enes and related spirocycles. 2D NMR experiments suggested that most of the observed diastereoselectivities were dictated by steric interactions; however, dipolarophiles with H bonding donors reversed the stereochemical outcome. X-ray crystallography confirmed the structural assignments.
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Affiliation(s)
- Jose Intano
- Department of Chemistry, University of Connecticut, Storrs, Connecticut 06269, United States
| | - Louis P Riel
- Department of Chemistry, University of Connecticut, Storrs, Connecticut 06269, United States
| | - Jacky Lim
- Department of Chemistry, University of Connecticut, Storrs, Connecticut 06269, United States
| | - Jerome R Robinson
- Department of Chemistry, Brown University, Providence, Rhode Island 02912, United States
| | - Amy R Howell
- Department of Chemistry, University of Connecticut, Storrs, Connecticut 06269, United States
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3
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Sharipov BT, Davidova AN, Valeev FА. cis-Annulation of an oxazoline fragment to levoglucosenone and the synthesis of 4-substituted 3-amino-1,6-anhydro-3-deoxy-β-D-mannopyranose. Chem Heterocycl Compd (N Y) 2022. [DOI: 10.1007/s10593-022-03073-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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4
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Gavrilov KN, Chuchelkin IV, Gavrilov VK, Zheglov SV, Firsin ID, Trunina VM, Zamilatskov IA, Tyurin VS, Tafeenko VA, Chernyshev VV, Zimarev VS, Goulioukina NS. Diverse “roof shaped” chiral diamidophosphites: palladium coordination and catalytic applications. NEW J CHEM 2022. [DOI: 10.1039/d1nj05143a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
“Roof shaped” chiral diamidophosphites of various structures and denticities were obtained and tested in Pd-catalyzed asymmetric allylic substitution.
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Affiliation(s)
- Konstantin N. Gavrilov
- Department of Chemistry, Ryazan State University named for S. Yesenin, 46 Svoboda Street, 390000 Ryazan, Russian Federation
| | - Ilya V. Chuchelkin
- Department of Chemistry, Ryazan State University named for S. Yesenin, 46 Svoboda Street, 390000 Ryazan, Russian Federation
| | - Vladislav K. Gavrilov
- Department of Chemistry, Ryazan State University named for S. Yesenin, 46 Svoboda Street, 390000 Ryazan, Russian Federation
| | - Sergey V. Zheglov
- Department of Chemistry, Ryazan State University named for S. Yesenin, 46 Svoboda Street, 390000 Ryazan, Russian Federation
| | - Ilya D. Firsin
- Department of Chemistry, Ryazan State University named for S. Yesenin, 46 Svoboda Street, 390000 Ryazan, Russian Federation
| | - Valeria M. Trunina
- Department of Chemistry, Ryazan State University named for S. Yesenin, 46 Svoboda Street, 390000 Ryazan, Russian Federation
| | - Ilya A. Zamilatskov
- A. N. Frumkin Institute of Physical Chemistry and Electrochemistry, Russian Academy of Sciences, Leninsky Prospekt 31/4, 119071, Moscow, Russian Federation
| | - Vladimir S. Tyurin
- A. N. Frumkin Institute of Physical Chemistry and Electrochemistry, Russian Academy of Sciences, Leninsky Prospekt 31/4, 119071, Moscow, Russian Federation
| | - Victor A. Tafeenko
- Department of Chemistry, M. V. Lomonosov Moscow State University, Leninskie Gory, GSP-1, 119991 Moscow, Russian Federation
| | - Vladimir V. Chernyshev
- A. N. Frumkin Institute of Physical Chemistry and Electrochemistry, Russian Academy of Sciences, Leninsky Prospekt 31/4, 119071, Moscow, Russian Federation
- Department of Chemistry, M. V. Lomonosov Moscow State University, Leninskie Gory, GSP-1, 119991 Moscow, Russian Federation
| | - Vladislav S. Zimarev
- Department of Chemistry, Ryazan State University named for S. Yesenin, 46 Svoboda Street, 390000 Ryazan, Russian Federation
- Department of Chemistry, M. V. Lomonosov Moscow State University, Leninskie Gory, GSP-1, 119991 Moscow, Russian Federation
| | - Nataliya S. Goulioukina
- Department of Chemistry, Ryazan State University named for S. Yesenin, 46 Svoboda Street, 390000 Ryazan, Russian Federation
- A. N. Frumkin Institute of Physical Chemistry and Electrochemistry, Russian Academy of Sciences, Leninsky Prospekt 31/4, 119071, Moscow, Russian Federation
- Department of Chemistry, M. V. Lomonosov Moscow State University, Leninskie Gory, GSP-1, 119991 Moscow, Russian Federation
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5
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Chuchelkin IV, Gavrilov KN, Gavrilov VK, Zheglov SV, Firsin ID, Perepukhov AM, Maximychev AV, Borisova NE, Zamilatskov IA, Tyurin VS, Dejoie C, Chernyshev VV, Zimarev VS, Goulioukina NS. Formation of Allylpalladium Complexes and Asymmetric Allylation Involving Modular Bridging Diamidophosphite-Sulfides Based on 1,4-Thioether Alcohols. Organometallics 2021. [DOI: 10.1021/acs.organomet.1c00491] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Affiliation(s)
- Ilya V. Chuchelkin
- Department of Chemistry, Ryazan State University named for S. Yesenin, 46 Svoboda Street, 390000 Ryazan, Russian Federation
| | - Konstantin N. Gavrilov
- Department of Chemistry, Ryazan State University named for S. Yesenin, 46 Svoboda Street, 390000 Ryazan, Russian Federation
| | - Vladislav K. Gavrilov
- Department of Chemistry, Ryazan State University named for S. Yesenin, 46 Svoboda Street, 390000 Ryazan, Russian Federation
| | - Sergey V. Zheglov
- Department of Chemistry, Ryazan State University named for S. Yesenin, 46 Svoboda Street, 390000 Ryazan, Russian Federation
| | - Ilya D. Firsin
- Department of Chemistry, Ryazan State University named for S. Yesenin, 46 Svoboda Street, 390000 Ryazan, Russian Federation
| | - Alexander M. Perepukhov
- Department of General Physics, Moscow Institute of Physics and Technology, Institutskii per. 9, 141700 Dolgoprudny, Moscow Region. Russian Federation
| | - Alexander V. Maximychev
- Department of General Physics, Moscow Institute of Physics and Technology, Institutskii per. 9, 141700 Dolgoprudny, Moscow Region. Russian Federation
| | - Nataliya E. Borisova
- Department of Chemistry, M. V. Lomonosov Moscow State University, Leninskie Gory, GSP-1, 119991 Moscow, Russian Federation
| | - Ilya A. Zamilatskov
- A. N. Frumkin Institute of Physical Chemistry and Electrochemistry, Russian Academy of Sciences, Leninsky Prospekt 31/4, 119071, Moscow, Russian Federation
| | - Vladimir S. Tyurin
- A. N. Frumkin Institute of Physical Chemistry and Electrochemistry, Russian Academy of Sciences, Leninsky Prospekt 31/4, 119071, Moscow, Russian Federation
| | - Catherine Dejoie
- European Synchrotron Radiation Facility, B. P. 220, 38043 Grenoble Cedex, France
| | - Vladimir V. Chernyshev
- Department of Chemistry, M. V. Lomonosov Moscow State University, Leninskie Gory, GSP-1, 119991 Moscow, Russian Federation
- A. N. Frumkin Institute of Physical Chemistry and Electrochemistry, Russian Academy of Sciences, Leninsky Prospekt 31/4, 119071, Moscow, Russian Federation
| | - Vladislav S. Zimarev
- Department of Chemistry, Ryazan State University named for S. Yesenin, 46 Svoboda Street, 390000 Ryazan, Russian Federation
- Department of Chemistry, M. V. Lomonosov Moscow State University, Leninskie Gory, GSP-1, 119991 Moscow, Russian Federation
| | - Nataliya S. Goulioukina
- Department of Chemistry, Ryazan State University named for S. Yesenin, 46 Svoboda Street, 390000 Ryazan, Russian Federation
- Department of Chemistry, M. V. Lomonosov Moscow State University, Leninskie Gory, GSP-1, 119991 Moscow, Russian Federation
- A. N. Frumkin Institute of Physical Chemistry and Electrochemistry, Russian Academy of Sciences, Leninsky Prospekt 31/4, 119071, Moscow, Russian Federation
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6
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Imrich MR, Biehler LE, Maichle-Mössmer C, Ziegler T. Carbohydrate-Based Chiral Iodoarene Catalysts: A Survey through the Development of an Improved Catalyst Design. Molecules 2019; 24:molecules24213883. [PMID: 31661915 PMCID: PMC6864689 DOI: 10.3390/molecules24213883] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/09/2019] [Revised: 10/24/2019] [Accepted: 10/24/2019] [Indexed: 11/16/2022] Open
Abstract
Iodoarene catalysts can be applied in versatile reactions, for instance in the construction of complex chiral molecules via dearomatization of simple aromatic compounds. Recently, we reported the synthesis of the first carbohydrate-based chiral iodoarene catalysts and their application in asymmetric catalysis. Here we describe the synthesis of some new and improved catalysts. An account on how we got to the improved catalyst design, as well as the X-ray structure of one of the carbohydrate-based iodoarenes, is given.
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Affiliation(s)
- Michael R Imrich
- Institute of Organic Chemistry, University of Tuebingen, Auf der Morgenstelle 18, 72076 Tuebingen, Germany.
| | - Linda E Biehler
- Institute of Organic Chemistry, University of Tuebingen, Auf der Morgenstelle 18, 72076 Tuebingen, Germany.
| | - Cäcilia Maichle-Mössmer
- Institute of Inorganic Chemistry, University of Tuebingen, Auf der Morgenstelle 18, 72076 Tuebingen, Germany.
| | - Thomas Ziegler
- Institute of Organic Chemistry, University of Tuebingen, Auf der Morgenstelle 18, 72076 Tuebingen, Germany.
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7
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Imrich MR, Ziegler T. Carbohydrate based chiral iodoarene catalysts for enantioselective dearomative spirocyclization. Tetrahedron Lett 2019. [DOI: 10.1016/j.tetlet.2019.150954] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
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8
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Noreen S, Zahoor AF, Ahmad S, Shahzadi I, Irfan A, Faiz S. Novel Chiral Ligands for Palladium-catalyzed Asymmetric Allylic Alkylation/ Asymmetric Tsuji-Trost Reaction: A Review. CURR ORG CHEM 2019. [DOI: 10.2174/1385272823666190624145039] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Abstract
Background:
Asymmetric catalysis holds a prestigious role in organic syntheses since a long
time and chiral inductors such as ligands have been used to achieve the utmost desired results
at this pitch. The asymmetric version of Tsuji-Trost allylation has played a crucial
role in enantioselective synthesis. Various chiral ligands have been known for Pdcatalyzed
Asymmetric Allylic Alkylation (AAA) reactions and exhibited excellent catalytic
potential. The use of chiral ligands as asymmetric inductors has widened the scope of
Tsuji-Trost allylic alkylation reactions.
Conclusion:
Therefore, in this review article, a variety of chiral inductors or ligands have been focused
for palladium catalyzed asymmetric allylic alkylation (Tsuji-Trost allylation) and in this
regard, recently reported literature (2013-2017) has been described. The use of ligands
causes the induction of enantiodiscrimination to the allylated products, therefore, the syntheses of various kinds
of ligands have been targeted by many research groups to employ in Pd-catalyzed AAA reactions.
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Affiliation(s)
- Samar Noreen
- Department of Chemistry, Government College University Faisalabad, Faisalabad-38000, Pakistan
| | - Ameer Fawad Zahoor
- Department of Chemistry, Government College University Faisalabad, Faisalabad-38000, Pakistan
| | - Sajjad Ahmad
- Department of Chemistry, University of Engineering and Technology Lahore, Faisalabad Campus, Faisalabad-38000, Pakistan
| | - Irum Shahzadi
- Department of Chemistry, Government College University Faisalabad, Faisalabad-38000, Pakistan
| | - Ali Irfan
- Department of Chemistry, Government College University Faisalabad, Faisalabad-38000, Pakistan
| | - Sadia Faiz
- Department of Chemistry, Government College University Faisalabad, Faisalabad-38000, Pakistan
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9
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Imrich MR, Maichle-Mössmer C, Ziegler T. d
-Fructose Based Spiro-Fused PHOX Ligands: Palladium Complexes and Application in Catalysis. European J Org Chem 2019. [DOI: 10.1002/ejoc.201900490] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Michael R. Imrich
- Institute of Organic Chemistry; University of Tübingen; Auf der Morgenstelle 18 72076 Tübingen Germany
| | | | - Thomas Ziegler
- Institute of Organic Chemistry; University of Tübingen; Auf der Morgenstelle 18 72076 Tübingen Germany
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10
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Imrich MR, Kraft J, Maichle-Mössmer C, Ziegler T. D-Fructose-based spiro-fused PHOX ligands: synthesis and application in enantioselective allylic alkylation. Beilstein J Org Chem 2018; 14:2082-2089. [PMID: 30202461 PMCID: PMC6122323 DOI: 10.3762/bjoc.14.182] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/08/2018] [Accepted: 06/22/2018] [Indexed: 01/19/2023] Open
Abstract
Phosphinooxazoline (PHOX) ligands are an important class of ligands in asymmetric catalysis. We synthesized ten novel D-fructose-derived spiro-fused PHOX ligands with different steric and electronic demand. The application of two of them was tested in asymmetric allylic alkylation. The ligands are prepared in two steps from readily available 1,2-O-isopropylidene protected β-D-fructopyranoses by the BF3·OEt2-promoted Ritter reaction with 2-bromobenzonitrile to construct the oxazoline moiety followed by Ullmann coupling of the resulting aryl bromides with diphenylphosphine. Both steps proceeded mostly in good to high yields (57–86% for the Ritter reaction and 35–89% for the Ullmann coupling). The Ritter reaction gave two anomers, which could be separated by column chromatography. The prepared ligands showed promising results (er of up to 84:16) in Tsuji–Trost reactions with diphenylallyl acetate as model substrate.
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Affiliation(s)
- Michael R Imrich
- Institute of Organic Chemistry, University of Tübingen, Auf der Morgenstelle 18, 72076 Tübingen, Germany
| | - Jochen Kraft
- Institute of Organic Chemistry, University of Tübingen, Auf der Morgenstelle 18, 72076 Tübingen, Germany
| | - Cäcilia Maichle-Mössmer
- Institute of Inorganic Chemistry, University of Tübingen, Auf der Morgenstelle 18, 72076 Tübingen, Germany
| | - Thomas Ziegler
- Institute of Organic Chemistry, University of Tübingen, Auf der Morgenstelle 18, 72076 Tübingen, Germany
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11
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Synthesis of Spironucleosides: Past and Future Perspectives. Molecules 2017; 22:molecules22112028. [PMID: 29165398 PMCID: PMC6150341 DOI: 10.3390/molecules22112028] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/16/2017] [Revised: 11/17/2017] [Accepted: 11/19/2017] [Indexed: 01/23/2023] Open
Abstract
Spironucleosides are a type of conformationally restricted nucleoside analogs in which the anomeric carbon belongs simultaneously to the sugar moiety and to the base unit. This locks the nucleic base in a specific orientation around the N-glycosidic bond, imposing restrictions on the flexibility of the sugar moiety. Anomeric spiro-functionalized nucleosides have gained considerable importance with the discovery of hydantocidin, a natural spironucleoside isolated from fermentation broths of Streptomyces hygroscopicus which exhibits potent herbicidal activity. The biological activity of hydantocidin has prompted considerable synthetic interest in this nucleoside and also in a variety of analogues, since important pharmaceutical leads can be found among modified nucleoside analogues. We present here an overview of the most important advances in the synthesis of spironucleosides.
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12
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Schmollinger D, Kraft J, Ewald C, Ziegler T. Synthesis of ruthenium and palladium complexes from glycosylated 2,2′-bipyridine and terpyridine ligands. Tetrahedron Lett 2017. [DOI: 10.1016/j.tetlet.2017.08.008] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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13
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Kraft J, Mill K, Ziegler T. Sugar-Annulated Oxazoline Ligands: A Novel Pd(II) Complex and Its Application in Allylic Substitution. Molecules 2016; 21:E1704. [PMID: 27973420 PMCID: PMC6274480 DOI: 10.3390/molecules21121704] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/25/2016] [Revised: 12/01/2016] [Accepted: 12/07/2016] [Indexed: 11/18/2022] Open
Abstract
Two novel carbohydrate-derived pyridyl (PYOX)- and cyclopropyl (CYBOX)-substituted oxazoline ligands were prepared from d-glucosamine hydrochloride and 1,3,4,6-tetra-O-acetyl-2-amino-2-deoxy-β-d-glucopyranose hydrochloride in two steps, respectively. The sugar-annulated PYOX ligand formed a stable metal complex with Pd(II), which was fully characterized by NMR spectroscopy and X-ray crystallography. NMR and X-ray analysis revealed a change of the conformation in the sugar moiety upon complexation with the palladium(II) species. Both glycosylated ligands resulted in high asymmetric induction (up to 98% ee) upon application as chiral ligands in the Pd-catalyzed allylic alkylation of rac-1,3-diphenylallyl acetate with dimethyl malonate (Tsuji-Trost reaction). Both ligands provided mainly the (R)-enantiomer of the alkylation product.
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Affiliation(s)
- Jochen Kraft
- Institute of Organic Chemistry, University of Tübingen, Auf der Morgenstelle 18, 72076 Tübingen, Germany.
| | - Katharina Mill
- Institute of Organic Chemistry, University of Tübingen, Auf der Morgenstelle 18, 72076 Tübingen, Germany.
| | - Thomas Ziegler
- Institute of Organic Chemistry, University of Tübingen, Auf der Morgenstelle 18, 72076 Tübingen, Germany.
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