1
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Mo JN, Su J, Zhao J. The Asymmetric A³(Aldehyde⁻Alkyne⁻Amine) Coupling: Highly Enantioselective Access to Propargylamines. Molecules 2019; 24:molecules24071216. [PMID: 30925732 PMCID: PMC6480255 DOI: 10.3390/molecules24071216] [Citation(s) in RCA: 21] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2019] [Revised: 03/22/2019] [Accepted: 03/27/2019] [Indexed: 11/16/2022] Open
Abstract
The recent developments in asymmetric A³ (aldehyde⁻alkyne⁻amine) coupling has been summarized in this review. Several interesting modifications of the ligands enabled the highly enantioselective synthesis of chiral propargylamines, which are further used in the construction of nitrogen-containing chiral building blocks.
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Affiliation(s)
- Jia-Nan Mo
- Zhang Dayu School of Chemistry, Dalian University of Technology, Dalian 116024, China.
| | - Junqi Su
- Zhang Dayu School of Chemistry, Dalian University of Technology, Dalian 116024, China.
| | - Jiannan Zhao
- Zhang Dayu School of Chemistry, Dalian University of Technology, Dalian 116024, China.
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2
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Szulc I, Kołodziuk R, Zawisza A. New phosphine-imine and phosphine-amine ligands derived from d -gluco-, d -galacto- and d -allosamine in Pd-catalysed asymmetric allylic alkylation. Tetrahedron 2018. [DOI: 10.1016/j.tet.2018.02.009] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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3
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Zhong X, Lv J, Luo S. Enantio- and Diastereoselective Cyclopropanation of β,γ-Unsaturated α-Ketoester by a Chiral Phosphate/Indium(III) Complex. Org Lett 2017; 19:3331-3334. [DOI: 10.1021/acs.orglett.7b01577] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Affiliation(s)
- Xingren Zhong
- Key
Laboratory of Molecular Recognition and Function, Institute of Chemistry, Chinese Academy of Sciences, Beijing, 100190, China
- University of Chinese Academy of Sciences, Beijing 100049, China
| | - Jian Lv
- Key
Laboratory of Molecular Recognition and Function, Institute of Chemistry, Chinese Academy of Sciences, Beijing, 100190, China
- University of Chinese Academy of Sciences, Beijing 100049, China
- Collaborative Innovation Center of Chemical and Engineering (Tianjin), Tianjin 300071, China
| | - Sanzhong Luo
- Key
Laboratory of Molecular Recognition and Function, Institute of Chemistry, Chinese Academy of Sciences, Beijing, 100190, China
- University of Chinese Academy of Sciences, Beijing 100049, China
- Collaborative Innovation Center of Chemical and Engineering (Tianjin), Tianjin 300071, China
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4
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Traboni S, Bedini E, Iadonisi A. Orthogonal protection of saccharide polyols through solvent-free one-pot sequences based on regioselective silylations. Beilstein J Org Chem 2016; 12:2748-2756. [PMID: 28144345 PMCID: PMC5238545 DOI: 10.3762/bjoc.12.271] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/30/2016] [Accepted: 11/30/2016] [Indexed: 11/23/2022] Open
Abstract
tert-Butyldimethylsilyl (TBDMS) and tert-butyldiphenylsilyl (TBDPS) are alcohol protecting groups widely employed in organic synthesis in view of their compatibility with a wide range of conditions. Their regioselective installation on polyols generally requires lengthy reactions and the use of high boiling solvents. In the first part of this paper we demonstrate that regioselective silylation of sugar polyols can be conducted in short times with the requisite silyl chloride and a very limited excess of pyridine (2-3 equivalents). Under these conditions, that can be regarded as solvent-free conditions in view of the insolubility of the polyol substrates, the reactions are faster than in most examples reported in the literature, and can even be further accelerated with a catalytic amount of tetrabutylammonium bromide (TBAB). The strategy proved also useful for either the selective TBDMS protection of secondary alcohols or the fast per-O-trimethylsilylation of saccharide polyols. In the second part of the paper the scope of the silylation approach was significantly extended with the development of unprecedented "one-pot" and "solvent-free" sequences allowing the regioselective silylation/alkylation (or the reverse sequence) of saccharide polyols in short times. The developed methodologies represent a very useful and experimentally simple tool for the straightforward access to saccharide building-blocks useful in organic synthesis.
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Affiliation(s)
- Serena Traboni
- Department of Chemical Sciences, University of Naples Federico II, Via Cinthia 4, 80126, Naples, Italy
| | - Emiliano Bedini
- Department of Chemical Sciences, University of Naples Federico II, Via Cinthia 4, 80126, Naples, Italy
| | - Alfonso Iadonisi
- Department of Chemical Sciences, University of Naples Federico II, Via Cinthia 4, 80126, Naples, Italy
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5
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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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6
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Henderson AS, Bower JF, Galan MC. Carbohydrates as enantioinduction components in stereoselective catalysis. Org Biomol Chem 2016; 14:4008-17. [PMID: 27064817 PMCID: PMC5048738 DOI: 10.1039/c6ob00368k] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/16/2016] [Accepted: 03/31/2016] [Indexed: 01/17/2023]
Abstract
Carbohydrate derivatives are readily available chiral molecules, yet they are infrequently employed as enantioinduction components in stereoselective catalysis. In this review, synthetic approaches to carbohydrate-based ligands and catalysts are outlined, along with example applications in enantioselective catalysis. A wide range of carbohydrate-based functionality is covered, and key trends and future opportunities are identified.
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Affiliation(s)
| | - John F Bower
- School of Chemistry, University of Bristol, Cantock's Close, Bristol. BS8 1TS, UK.
| | - M Carmen Galan
- School of Chemistry, University of Bristol, Cantock's Close, Bristol. BS8 1TS, UK.
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7
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Vangala M, Shinde GP. Synthesis of D-fructose-derived spirocyclic 2-substituted-2-oxazoline ribosides. Beilstein J Org Chem 2016; 11:2289-96. [PMID: 26734077 PMCID: PMC4685833 DOI: 10.3762/bjoc.11.249] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/29/2015] [Accepted: 11/05/2015] [Indexed: 01/06/2023] Open
Abstract
The TMSOTf-mediated synthesis of β-configured spirocyclic 2-substituted-2-oxazoline ribosides was achieved using a “Ritter-like” reaction in toluene through nucleophilic addition of electron-rich nitriles to the oxacarbenium ion intermediate of 1,2;3,4-di-O-isopropylidene-β-D-psicofuranose derivatives with concomitant intramolecular trapping of the C2 hydroxymethyl group on the electrophilic nitrilium carbon. These carbohydrate-derived spirooxazolines are stable and were obtained in good yield with high stereoselectivity due to the conformational rigidity imparted by the 3,4-isopropylidene group.
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Affiliation(s)
- Madhuri Vangala
- Department of Chemistry, Indian Institute of Science Education and Research, Pune 411 008, India
| | - Ganesh P Shinde
- Department of Chemistry, Indian Institute of Science Education and Research, Pune 411 008, India
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8
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Ford A, Miel H, Ring A, Slattery CN, Maguire AR, McKervey MA. Modern Organic Synthesis with α-Diazocarbonyl Compounds. Chem Rev 2015; 115:9981-10080. [PMID: 26284754 DOI: 10.1021/acs.chemrev.5b00121] [Citation(s) in RCA: 1093] [Impact Index Per Article: 121.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Affiliation(s)
| | - Hugues Miel
- Almac Discovery Ltd. , David Keir Building, Stranmillis Road, Belfast BT9 5AG, United Kingdom
| | | | | | | | - M Anthony McKervey
- Almac Sciences Ltd. , Almac House, 20 Seagoe Industrial Estate, Craigavon BT63 5QD, United Kingdom
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9
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Szulc I, Kołodziuk R, Kryczka B, Zawisza A. New phosphine–imine ligands derived from d-gluco- and d-galactosamine in Pd-catalysed asymmetric allylic alkylation. Tetrahedron Lett 2015. [DOI: 10.1016/j.tetlet.2015.06.031] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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10
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Kraft J, Ziegler T. Synthesis of spirofused carbohydrate-oxazoline based palladium(II) complexes. Carbohydr Res 2015; 411:56-63. [PMID: 25974854 DOI: 10.1016/j.carres.2015.04.009] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/18/2015] [Revised: 03/31/2015] [Accepted: 04/09/2015] [Indexed: 10/23/2022]
Abstract
Four carbohydrate-derived 2-pyridyl and 2-quinolinyl substituted spiro-oxazoline ligands were prepared from 3,4,5-tri-O-benzyl-1,2-di-O-isopropylidene-β-D-fructose in four steps. Conversion of the latter compound with trimethylsilylazide followed by hydrogenation gave an anomeric mixture of 2-amino-3,4,5-tri-O-benzyl-2-deoxy-1-O-trimethylsilyl-D-fructopyranose. Amide coupling of the fructosylamines with picolinic acid and quinaldic acid, respectively afforded the corresponding anomeric amidofructosides, which were both separated and characterized by NMR spectroscopy and X-ray crystallography. Cyclization of alpha-amides was achieved by treatment of the corresponding mesylates with NaH while beta-amides were directly cyclisized with NCS and Ph3P to give the corresponding 2-pyridyl (PyOx) and 2-quinolyl (QuinOx) substituted spiro-oxazoline ligands, respectively. The 2-pyridyl substituted spiro-oxazoline ligands PyOx formed stable complexes with Pd(II), which were fully characterized and their structure determined by X-ray crystallography, whereas the corresponding QuinOx ligands failed to form similar Pd complexes.
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Affiliation(s)
- Jochen Kraft
- Institute of Organic 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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11
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Joseph AA, Dhurandhare VM, Chang CW, Verma VP, Mishra GP, Ku CC, Lin CC, Wang CC. Chemoselective per-O-trimethylsilylation and homogeneous N-functionalisation of amino sugars. Chem Commun (Camb) 2015; 51:104-6. [DOI: 10.1039/c4cc06645f] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
Abstract
HomogeneousN-functionalisation of amino sugars can be achievedviaefficient CH3CN-promoted hexamethyldisilazane per-O-trimethylsilylation.
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Affiliation(s)
- A. Abragam Joseph
- Institute of Chemistry
- Academia Sinica
- Taipei 115
- Taiwan
- Department of Chemistry
| | - Vijay M. Dhurandhare
- Institute of Chemistry
- Academia Sinica
- Taipei 115
- Taiwan
- Chemical Biology and Molecular Biophysics Program
| | - Chun-Wei Chang
- Institute of Chemistry
- Academia Sinica
- Taipei 115
- Taiwan
- Chemical Biology and Molecular Biophysics Program
| | | | | | - Chiao-Chu Ku
- Institute of Chemistry
- Academia Sinica
- Taipei 115
- Taiwan
| | - Chun-Cheng Lin
- Department of Chemistry
- National Tsing Hua University
- Hsinchu 300
- Taiwan
| | - Cheng-Chung Wang
- Institute of Chemistry
- Academia Sinica
- Taipei 115
- Taiwan
- Chemical Biology and Molecular Biophysics Program
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12
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Reddy BVS, Reddy SM, Swain M. Sugar thiourea catalyzed highly enantioselective Michael addition of 2-hydroxy-1,4-naphthoquinone to β-nitroalkenes. RSC Adv 2013. [DOI: 10.1039/c2ra22270a] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
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13
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Reddy BVS, Swain M, Reddy SM, Yadav JS. Enantioselective Michael addition of 2-hydroxy-1,4-naphthoquinone and 1,3-dicarbonyls to β-nitroalkenes catalyzed by a novel bifunctional rosin-indane amine thiourea catalyst. RSC Adv 2013. [DOI: 10.1039/c3ra40965a] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023] Open
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14
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Özüduru G, Schubach T, Boysen MMK. Enantioselective Cyclopropanation of Indoles: Construction of All-Carbon Quaternary Stereocenters. Org Lett 2012; 14:4990-3. [DOI: 10.1021/ol302388t] [Citation(s) in RCA: 84] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Gülsüm Özüduru
- Institute of Organic Chemistry, Gottfried-Wilhelm-Leibniz University of Hannover, D-30167 Hannover, Germany
| | - Thea Schubach
- Institute of Organic Chemistry, Gottfried-Wilhelm-Leibniz University of Hannover, D-30167 Hannover, Germany
| | - Mike M. K. Boysen
- Institute of Organic Chemistry, Gottfried-Wilhelm-Leibniz University of Hannover, D-30167 Hannover, Germany
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15
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Grugel H, Albrecht F, Minuth T, Boysen MMK. Efficient Pseudo-enantiomeric Carbohydrate Olefin Ligands. Org Lett 2012; 14:3780-3. [DOI: 10.1021/ol3015896] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Holger Grugel
- Institute of Organic Chemistry, Gottfried-Wilhelm-Leibniz University of Hannover, D-30167 Hannover, Germany
| | - Fabian Albrecht
- Institute of Organic Chemistry, Gottfried-Wilhelm-Leibniz University of Hannover, D-30167 Hannover, Germany
| | - Tobias Minuth
- Institute of Organic Chemistry, Gottfried-Wilhelm-Leibniz University of Hannover, D-30167 Hannover, Germany
| | - Mike M. K. Boysen
- Institute of Organic Chemistry, Gottfried-Wilhelm-Leibniz University of Hannover, D-30167 Hannover, Germany
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16
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Awan SI, Werz DB. Syntheses of 1,2-annulated and 1-spiroannulated carbohydrate derivatives: Recent developments. Bioorg Med Chem 2012; 20:1846-56. [DOI: 10.1016/j.bmc.2011.10.089] [Citation(s) in RCA: 33] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/19/2011] [Revised: 10/20/2011] [Accepted: 10/30/2011] [Indexed: 01/09/2023]
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17
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George J, Reddy BVS. Enantioselective Friedel–Crafts alkylation of indoles with 2-enoylpyridine-N-oxides catalyzed by glucoBOX-Cu(ii) complex. Org Biomol Chem 2012; 10:4731-8. [DOI: 10.1039/c2ob25315a] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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18
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Subba Reddy B, George J. Enantioselective Henry reaction catalyzed by a copper(II) glucoBOX complex. ACTA ACUST UNITED AC 2011. [DOI: 10.1016/j.tetasy.2011.06.012] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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19
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Woodward S, Diéguez M, Pàmies O. Use of sugar-based ligands in selective catalysis: Recent developments. Coord Chem Rev 2010. [DOI: 10.1016/j.ccr.2010.03.005] [Citation(s) in RCA: 75] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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20
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Pfrengle F, Reissig HU. Addition of lithiated enol ethers to nitrones and subsequent Lewis acid induced cyclizations to enantiopure 3,6-dihydro-2H-pyrans - an approach to carbohydrate mimetics. Beilstein J Org Chem 2010; 6:75. [PMID: 20703374 PMCID: PMC2919261 DOI: 10.3762/bjoc.6.75] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/14/2010] [Accepted: 06/08/2010] [Indexed: 01/10/2023] Open
Abstract
A stereodivergent synthesis of enantiopure 3,6-dihydro-2H-pyrans is presented. The addition of lithiated enol ethers to carbohydrate-derived nitrones afforded syn- or anti-configured hydroxylamine derivatives 4a-d that were cyclized under Lewis acidic conditions to yield functionalized dihydropyrans cis- or trans-5a-d containing an enol ether moiety. This functional group was employed for a variety of subsequent reactions such as dihydroxylation or bromination. Bicyclic enol ether 19 was oxidatively cleaved to provide the highly functionalized ten-membered ring lactone 20. The synthesized enantiopure aminopyrans 24, 26, 28 and 30 can be regarded as carbohydrate mimetics. Trimeric versions of 24 and 28 were constructed via their attachment to a tricarboxylic acid core.
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Affiliation(s)
- Fabian Pfrengle
- Freie Universität Berlin, Institut für Chemie und Biochemie, Takustrasse 3, D-14195 Berlin, Germany
| | - Hans-Ulrich Reissig
- Freie Universität Berlin, Institut für Chemie und Biochemie, Takustrasse 3, D-14195 Berlin, Germany
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21
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Minuth T, Boysen MMK. Bis(oxazolines) based on glycopyranosides - steric, configurational and conformational influences on stereoselectivity. Beilstein J Org Chem 2010; 6:23. [PMID: 20502606 PMCID: PMC2874406 DOI: 10.3762/bjoc.6.23] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/08/2009] [Accepted: 02/18/2010] [Indexed: 11/23/2022] Open
Abstract
In previous studies we found that the asymmetric induction of bis(oxazolines) based on D-glucosamine strongly depended on the steric demand of the 3-O-substituents. To further probe the impact of the 3-position of the pyranose scaffold, we prepared 3-epimerised and 3-defunctionalised versions of these ligands as well as a 3-O-formyl derivative. Application of these new ligands in asymmetric cyclopropanation revealed strong steric and configurational effects of position 3 on asymmetric induction, further dramatic effects of the pyranose conformation were also observed.
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Affiliation(s)
- Tobias Minuth
- Institute of Organic Chemistry, Gottfried-Wilhelm-Leibniz University of Hannover, Schneiderberg 1B, D-30167 Hannover, Germany
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22
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23
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Goyard D, Telligmann SM, Goux-Henry C, Boysen MM, Framery E, Gueyrard D, Vidal S. Carbohydrate-based spiro bis(isoxazolines): synthesis and evaluation in asymmetric catalysis. Tetrahedron Lett 2010. [DOI: 10.1016/j.tetlet.2009.11.028] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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24
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Minuth T, Boysen MMK. Novel, Efficient Alkene-Phosphinite Hybrid Ligand Based on d-Glucose. Org Lett 2009; 11:4212-5. [DOI: 10.1021/ol901579g] [Citation(s) in RCA: 75] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Tobias Minuth
- Institute of Organic Chemistry, Gottfried Wilhelm Leibniz University of Hannover, Schneiderberg 1B, D-30167 Hannover, Germany
| | - Mike M. K. Boysen
- Institute of Organic Chemistry, Gottfried Wilhelm Leibniz University of Hannover, Schneiderberg 1B, D-30167 Hannover, Germany
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25
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Minuth T, Irmak M, Groschner A, Lehnert T, Boysen MMK. Sweets for Catalysis - Facile Optimisation of Carbohydrate-Based Bis(oxazoline) Ligands. European J Org Chem 2009. [DOI: 10.1002/ejoc.200801035] [Citation(s) in RCA: 40] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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26
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Glegoła K, Johannesen SA, Thim L, Goux-Henry C, Skrydstrup T, Framery E. Simple d-glucosamine-based phosphine-imine and phosphine-amine ligands in Pd-catalyzed asymmetric allylic alkylations. Tetrahedron Lett 2008. [DOI: 10.1016/j.tetlet.2008.09.039] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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27
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28
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Irmak M, Boysen MM. A New Pyridyl Bis(oxazoline) Ligand Prepared fromD-Glucosamine for Asymmetric Alkynylation of Imines. Adv Synth Catal 2008. [DOI: 10.1002/adsc.200700592] [Citation(s) in RCA: 50] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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29
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Abstract
While amino acids, terpenes and alkaloids have found broad application as tools in stereoselective organic synthesis, carbohydrates have only lately been recognised as versatile starting materials for chiral auxiliaries, reagents, ligands and organocatalysts. The structural diversity of carbohydrates and the high density of functional groups offer a wide variety of opportunities for derivatization and tailoring of synthetic tools to a specific problem.
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Affiliation(s)
- Mike M K Boysen
- Institute of Organic Chemistry, Gottfried-Wilhelm-Leibniz University Hannover, Schneiderberg 1B, 30167 Hannover, Germany.
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30
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Diéguez M, Claver C, Pàmies O. Recent Progress in Asymmetric Catalysis Using Chiral Carbohydrate‐Based Ligands. European J Org Chem 2007. [DOI: 10.1002/ejoc.200700082] [Citation(s) in RCA: 88] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Montserrat Diéguez
- Departament de Química Física i Inorgànica, Universitat Rovira i Virgili C/Marcel·li Domingo s/n. 43007 Tarragona, Spain
| | - Carmen Claver
- Departament de Química Física i Inorgànica, Universitat Rovira i Virgili C/Marcel·li Domingo s/n. 43007 Tarragona, Spain
| | - Oscar Pàmies
- Departament de Química Física i Inorgànica, Universitat Rovira i Virgili C/Marcel·li Domingo s/n. 43007 Tarragona, Spain
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