1
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Kuzu MY, Schmidt A, Strohmann C. Enantioselective Synthesis of Phosphine Boranes via Crystallization-Induced Dynamic Resolution of Lithiated Intermediate by Understanding the Underlying Epimerization Process. Angew Chem Int Ed Engl 2024; 63:e202319665. [PMID: 38427610 DOI: 10.1002/anie.202319665] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/19/2023] [Revised: 02/13/2024] [Accepted: 02/19/2024] [Indexed: 03/03/2024]
Abstract
Described herein is the successful crystallization-induced dynamic resolution (CIDR) of an α-lithiated phosphine borane utilizing the easily accessible and inexpensive ligand (R,R)-TMCDA. Starting from the essential P-prochiral building block dimethyl phenyl phosphine borane we were able to obtain phosphine boranes in yields up to 80 % and e.r. up to 98 : 2 by crystallization of the lithiated intermediate prior to the trapping reaction. NMR-based deuterium labeling experiments indicate that the epimerization in solution is based on the intermolecular proton transfer between nonlithiated phosphine borane and the corresponding lithiated intermediate, rendering the presence of the remaining starting compound in an optimized solvent mixture the main factor for successful enantioselective synthesis. Quantum chemical calculations using different model systems based on solid state structures confirm these experimental results. By gaining insights into the epimerization mechanism, essential principles for CIDR of lithiated phosphine boranes are elucidated that may be expanded to other important P-stereogenic compounds and simple chiral amines.
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Affiliation(s)
- Mehmet Yasin Kuzu
- Inorganic Chemistry, TU Dortmund University, Otto-Hahn-Straße 6, 44227, Dortmund, Germany
| | - Annika Schmidt
- Inorganic Chemistry, TU Dortmund University, Otto-Hahn-Straße 6, 44227, Dortmund, Germany
| | - Carsten Strohmann
- Inorganic Chemistry, TU Dortmund University, Otto-Hahn-Straße 6, 44227, Dortmund, Germany
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2
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Ly KU, Boussonnière A, Castanet A. Intramolecular
Anti
‐Carbolithiation of Alkynes: Stereo‐Directing Effect of Lithium‐Coordinating Substituents. European J Org Chem 2022. [DOI: 10.1002/ejoc.202101409] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Kim Uyen Ly
- Institut des Molécules et Matériaux du Mans (IMMM), UMR 6283 CNRS – Le Mans Université Avenue Olivier Messiaen 72085 Le Mans France
| | - Anne Boussonnière
- Institut des Molécules et Matériaux du Mans (IMMM), UMR 6283 CNRS – Le Mans Université Avenue Olivier Messiaen 72085 Le Mans France
| | - Anne‐Sophie Castanet
- Institut des Molécules et Matériaux du Mans (IMMM), UMR 6283 CNRS – Le Mans Université Avenue Olivier Messiaen 72085 Le Mans France
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3
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Williams MB, Wells RJ, Boyer A. Synthesis and reactivity of 1-sulfonylcyclooctatriazoles. Chem Commun (Camb) 2022; 58:12495-12498. [DOI: 10.1039/d2cc03648g] [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
Sulfonyl azides undergo rapid inverse electron demand SPAAC with strained alkynes to deliver 1-sulfonyl-1,2,3-triazoles. Treatment of these with Rh(ii) carboxylate catalyst promotes denitrogenation and transannular 1,5-H insertion or 1,2-H shift.
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Affiliation(s)
| | | | - Alistair Boyer
- School of Chemistry, University of Glasgow, Glasgow, G12 8QQ, UK
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4
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Wong JYF, Thomson CG, Vilela F, Barker G. Flash chemistry enables high productivity metalation-substitution of 5-alkyltetrazoles. Chem Sci 2021; 12:13413-13424. [PMID: 34777760 PMCID: PMC8528014 DOI: 10.1039/d1sc04176b] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/29/2021] [Accepted: 09/14/2021] [Indexed: 12/12/2022] Open
Abstract
Tetrazoles play a prominent role in medicinal chemistry due to their role as carboxylate bioisosteres but have largely been overlooked as C-H functionalisation substrates. We herein report the development of a high-yielding and general procedure for the heterobenzylic C-H functionalisation of 5-alkyltetrazoles in up to 97% yield under batch conditions using a metalation/electrophilic trapping strategy. Through the use of thermal imaging to identify potentially unsafe exotherms, a continuous flow procedure using a flash chemistry strategy has also been developed, allowing products to be accessed in up to 95% yield. This enabled an extremely high productivity rate of 141 g h-1 to be achieved on an entry-level flow system.
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Affiliation(s)
- Jeff Y F Wong
- Institute of Chemical Sciences, Heriot-Watt University Riccarton Edinburgh EH14 4AS UK
| | - Christopher G Thomson
- Institute of Chemical Sciences, Heriot-Watt University Riccarton Edinburgh EH14 4AS UK
| | - Filipe Vilela
- Institute of Chemical Sciences, Heriot-Watt University Riccarton Edinburgh EH14 4AS UK
- Continuum Flow Lab, Heriot-Watt University Riccarton Edinburgh EH14 4AS UK
| | - Graeme Barker
- Institute of Chemical Sciences, Heriot-Watt University Riccarton Edinburgh EH14 4AS UK
- Continuum Flow Lab, Heriot-Watt University Riccarton Edinburgh EH14 4AS UK
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5
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Valles DA, Dutta S, Paul A, Abboud KA, Ghiviriga I, Seidel D. α,α'-C-H Bond Difunctionalization of Unprotected Alicyclic Amines. Org Lett 2021; 23:6367-6371. [PMID: 34323490 PMCID: PMC8609614 DOI: 10.1021/acs.orglett.1c02187] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
A simple one-pot procedure enables the sequential, regioselective, and diastereoselective introduction of the same or two different substituents to the α- and α'-positions of unprotected azacycles. Aryl, alkyl, and alkenyl substituents are introduced via their corresponding organolithium compounds. The scope of this transformation includes pyrrolidines, piperidines, azepanes, and piperazines.
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Affiliation(s)
- Daniel A. Valles
- Center for Heterocyclic Compounds, Department of Chemistry, University of Florida, Gainesville, Florida 32611, United States
| | - Subhradeep Dutta
- Center for Heterocyclic Compounds, Department of Chemistry, University of Florida, Gainesville, Florida 32611, United States
| | - Anirudra Paul
- Center for Heterocyclic Compounds, Department of Chemistry, University of Florida, Gainesville, Florida 32611, United States
| | - Khalil A. Abboud
- Center for X-ray Crystallography, Department of Chemistry, University of Florida, Gainesville, Florida 32611, United States
| | - Ion Ghiviriga
- Center for NMR Spectroscopy, Department of Chemistry, University of Florida, Gainesville, Florida 32611, United States
| | - Daniel Seidel
- Center for Heterocyclic Compounds, Department of Chemistry, University of Florida, Gainesville, Florida 32611, United States
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6
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Łastawiecka E, Frynas S, Pietrusiewicz KM. Desymmetrization Approach to the Synthesis of Optically Active P-Stereogenic Phosphin-2-en-4-ones. J Org Chem 2021; 86:6195-6206. [PMID: 33900770 PMCID: PMC8279496 DOI: 10.1021/acs.joc.0c03055] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Abstract
Two synthetic protocols for the conversion of 1-phenylphosphinan-4-ones to novel P-stereogenic 1-phenylphosphin-2-en-4-ones by enantioselective deprotonation followed by oxidation and by asymmetric organocatalytic halogenation accompanied by elimination have been developed. These two-step one-pot transformations provide convenient access to optically active 1-phenylphosphin-2-en-4-one 1-sulfide and 1-phenylphosphin-2-en-4-one 1-oxide of 96 and 55% enantiomeric purities, respectively.
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Affiliation(s)
- Elżbieta Łastawiecka
- Department of Organic Chemistry, Institute of Chemical Sciences, Faculty of Chemistry, Marie Curie-Sklodowska University, Gliniana 33 St., 20-614 Lublin, Poland
| | - Sławomir Frynas
- Department of Organic Chemistry, Institute of Chemical Sciences, Faculty of Chemistry, Marie Curie-Sklodowska University, Gliniana 33 St., 20-614 Lublin, Poland
| | - K Michał Pietrusiewicz
- Department of Organic Chemistry, Institute of Chemical Sciences, Faculty of Chemistry, Marie Curie-Sklodowska University, Gliniana 33 St., 20-614 Lublin, Poland
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7
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Dong Y, Lund CJ, Porter GJ, Clarke RM, Zheng SL, Cundari TR, Betley TA. Enantioselective C–H Amination Catalyzed by Nickel Iminyl Complexes Supported by Anionic Bisoxazoline (BOX) Ligands. J Am Chem Soc 2021; 143:817-829. [DOI: 10.1021/jacs.0c09839] [Citation(s) in RCA: 28] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Yuyang Dong
- Department of Chemistry and Chemical Biology, Harvard University, 12 Oxford Street, Cambridge, Massachusetts 02138, United States
| | - Colton J. Lund
- Department of Chemistry, Center for Advances Scientific Computing and Modeling (CASCaM), University of North Texas, Denton, Texas 76203, United States
| | - Gerard J. Porter
- Department of Chemistry and Chemical Biology, Harvard University, 12 Oxford Street, Cambridge, Massachusetts 02138, United States
| | - Ryan M. Clarke
- Department of Chemistry and Chemical Biology, Harvard University, 12 Oxford Street, Cambridge, Massachusetts 02138, United States
| | - Shao-Liang Zheng
- Department of Chemistry and Chemical Biology, Harvard University, 12 Oxford Street, Cambridge, Massachusetts 02138, United States
| | - Thomas R. Cundari
- Department of Chemistry, Center for Advances Scientific Computing and Modeling (CASCaM), University of North Texas, Denton, Texas 76203, United States
| | - Theodore A. Betley
- Department of Chemistry and Chemical Biology, Harvard University, 12 Oxford Street, Cambridge, Massachusetts 02138, United States
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8
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Blangetti M, O'Shea DF. Chiral auxiliary-mediated synthesis of planar chiral [2.2]metacyclophanes. Tetrahedron Lett 2020. [DOI: 10.1016/j.tetlet.2020.152492] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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9
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Guyon H, Castanet AS, Boussonnière A. Computational Insight into 1,2-Diamine, -Diether, and -Amino Ether Chiral Ligand-Mediated Carbolithiation: A Case of Enantioinduction Reversal. J Org Chem 2020; 85:8933-8943. [PMID: 32597647 DOI: 10.1021/acs.joc.0c00832] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
trans-1,2-Cyclohexanediamine, -diether, and -amino ether were compared as chiral inducers in the asymmetric intramolecular carbolithiation of olefinic aryllithiums. Switching from diamine to ethereal ligands inverts the sense of asymmetric induction. This reversal of stereoselectivity was investigated through density functional theory calculations. High enantioselectivities observed with diether and amino ether ligands arise from favorable weak interactions between the ligand and the substrate. The relative efficiency of the three ligands and sense of stereoinduction for the most efficient diether and amino ether ligands prove to be foreseeable by modeling the reaction with the parent achiral 1,2-bidentate additives and comparing the diastereomeric transition states stemming from the two half-chair conformations of their lithium chelate.
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Affiliation(s)
- Hélène Guyon
- Institut des Molécules et Matériaux du Mans (IMMM)-UMR 6283 CNRS-Le Mans Université, Avenue Olivier Messiaen, Le Mans 72085, France
| | - Anne-Sophie Castanet
- Institut des Molécules et Matériaux du Mans (IMMM)-UMR 6283 CNRS-Le Mans Université, Avenue Olivier Messiaen, Le Mans 72085, France
| | - Anne Boussonnière
- Institut des Molécules et Matériaux du Mans (IMMM)-UMR 6283 CNRS-Le Mans Université, Avenue Olivier Messiaen, Le Mans 72085, France
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10
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Fan D, Liu Y, Jia J, Zhang Z, Liu Y, Zhang W. Synthesis of Chiral α-Aminosilanes through Palladium-Catalyzed Asymmetric Hydrogenation of Silylimines. Org Lett 2019; 21:1042-1045. [DOI: 10.1021/acs.orglett.8b04073] [Citation(s) in RCA: 21] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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11
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Ho HE, James MJ, O’Brien P, Taylor RJK, Unsworth WP. Ag(I)-Catalyzed Synthesis of Azabicyclic Alkaloid Frameworks from Ketimine-Tethered Ynones: Total Synthesis of Indolizidine 209D. Org Lett 2018; 20:1439-1443. [DOI: 10.1021/acs.orglett.8b00225] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Hon Eong Ho
- Department of Chemistry, University of York, Heslington, York YO10
5DD, U.K
| | - Michael J. James
- Department of Chemistry, University of York, Heslington, York YO10
5DD, U.K
| | - Peter O’Brien
- Department of Chemistry, University of York, Heslington, York YO10
5DD, U.K
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12
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Mateo P, Cinqualbre JE, Meyer Mojzes M, Schenk K, Renaud P. Reductive Alkylation of Tertiary Lactams via Addition of Organocopper (RCu) Reagents to Thioiminium Ions. J Org Chem 2017; 82:12318-12327. [DOI: 10.1021/acs.joc.7b02150] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Pierre Mateo
- Department
of Chemistry and Biochemistry, University of Bern, Freiestrasse 3, 3012 Bern, Switzerland
| | - Joséphine E. Cinqualbre
- Department
of Chemistry and Biochemistry, University of Bern, Freiestrasse 3, 3012 Bern, Switzerland
| | - Melinda Meyer Mojzes
- Department
of Chemistry and Biochemistry, University of Bern, Freiestrasse 3, 3012 Bern, Switzerland
| | - Kurt Schenk
- Laboratoire
de Magnétisme Quantique, Ecole Polytechnique Fédérale de Lausanne, BSP 314, Rte de la Sorge, CH-1015 Lausanne, Switzerland
| | - Philippe Renaud
- Department
of Chemistry and Biochemistry, University of Bern, Freiestrasse 3, 3012 Bern, Switzerland
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13
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Guyon H, Boussonnière A, Castanet AS. Readily Accessible 1,2-Amino Ether Ligands for Enantioselective Intramolecular Carbolithiation. J Org Chem 2017; 82:4949-4957. [PMID: 28394126 DOI: 10.1021/acs.joc.7b00423] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
A new class of chiral 1,2-amino ether ligands, readily accessible from naturally occurring α-amino- or α-hydroxy acids, was found to provide high levels of both conversion and stereocontrol (up to 95:5 er) in intramolecular carbolithiation reactions, outperforming the benchmark ligand (-)-sparteine. The ligand could be used in a substoichiometric amount (0.25 equiv) without significant loss of enantioselectivity.
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Affiliation(s)
- Hélène Guyon
- Université du Maine and CNRS UMR 6283, Institut des Molécules et Matériaux du Mans , Faculté des Sciences et Techniques, avenue Olivier Messiaen, 72085 Le Mans Cedex 9, France
| | - Anne Boussonnière
- Université du Maine and CNRS UMR 6283, Institut des Molécules et Matériaux du Mans , Faculté des Sciences et Techniques, avenue Olivier Messiaen, 72085 Le Mans Cedex 9, France
| | - Anne-Sophie Castanet
- Université du Maine and CNRS UMR 6283, Institut des Molécules et Matériaux du Mans , Faculté des Sciences et Techniques, avenue Olivier Messiaen, 72085 Le Mans Cedex 9, France
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14
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Mahato S, Jana CK. Iterative direct C(sp3)–H functionalization of amines: diastereoselective divergent syntheses of α,α′-disubstituted alicyclic amines. Org Biomol Chem 2017; 15:1655-1660. [DOI: 10.1039/c6ob02257j] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Facile access to the syn-α,α′-disubstituted N-heterocycles via iterative C–H oxygenation and C–C bond formation.
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Affiliation(s)
- Sujit Mahato
- Department of Chemistry
- Indian Institute of Technology Guwahati
- Guwahati-781039
- India
| | - Chandan K. Jana
- Department of Chemistry
- Indian Institute of Technology Guwahati
- Guwahati-781039
- India
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15
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Antermite D, Degennaro L, Luisi R. Recent advances in the chemistry of metallated azetidines. Org Biomol Chem 2017; 15:34-50. [DOI: 10.1039/c6ob01665k] [Citation(s) in RCA: 78] [Impact Index Per Article: 11.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The almost unexplored four-membered azetidines represent a particularly interesting class of molecules, among the family of saturated nitrogen heterocycles. This review reports recent developments in direct metal-based functionalization of the azetidine ring, focusing on the regio- and stereoselectivity of these reactions.
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Affiliation(s)
- Daniele Antermite
- Department of Pharmacy – Drug Sciences
- University of Bari
- Bari 70125
- Italy
| | | | - Renzo Luisi
- Department of Pharmacy – Drug Sciences
- University of Bari
- Bari 70125
- Italy
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16
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Foley VM, Cano R, McGlacken GP. The search for an easily-prepared sparteine surrogate. ACTA ACUST UNITED AC 2016. [DOI: 10.1016/j.tetasy.2016.09.001] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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17
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Classical-Reaction-Driven Stereo- and Regioselective C(sp3)-H Functionalization of Aliphatic Amines. CHEM REC 2016; 16:1477-88. [DOI: 10.1002/tcr.201600001] [Citation(s) in RCA: 34] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/04/2016] [Indexed: 01/08/2023]
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18
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Jaklińska M, Cordier M, Stankevič M. Stereoselectivity of Michael Addition of P(X)–H-Type Nucleophiles to Cyclohexen-1-ylphosphine Oxide: The Case of Base-Selective Transformation. J Org Chem 2016; 81:1378-90. [DOI: 10.1021/acs.joc.5b02337] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Magdalena Jaklińska
- Department
of Organic Chemistry, Faculty of Chemistry, Marie Curie-Sklodowska University, Gliniana 33, 20-614 Lublin, Poland
| | - Marie Cordier
- Laboratoire
de Chimie Moléculaire, UMR 9168 - CNRS, École Polytechnique, Route de Saclay, Palaiseau 91128 Cedex, France
| | - Marek Stankevič
- Department
of Organic Chemistry, Faculty of Chemistry, Marie Curie-Sklodowska University, Gliniana 33, 20-614 Lublin, Poland
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19
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Rayner PJ, Smith JC, Denneval C, O'Brien P, Clarke PA, Horan RAJ. Mechanistic interrogation of the asymmetric lithiation-trapping of N-thiopivaloyl azetidine and pyrrolidine. Chem Commun (Camb) 2016; 52:1354-7. [PMID: 26620913 DOI: 10.1039/c5cc08690f] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/16/2023]
Abstract
A fundamental mechanistic study of the s-BuLi/chiral diamine-mediated lithiation-trapping of N-thiopivaloyl azetidine and pyrrolidine is reported. We show that lithiated thiopivalamides are configurationally unstable at -78 °C. Reaction then proceeds via a dynamic resolution of diastereomeric lithiated intermediates and this accounts for the variable sense and degree of asymmetric induction observed compared to N-Boc heterocycles.
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Affiliation(s)
- Peter J Rayner
- Department of Chemistry, University of York, Heslington, York YO10 5DD, UK.
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20
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Zhang WY, Sun C, Hunt D, He M, Deng Y, Zhu Z, Chen CL, Katz CE, Niu J, Hogan PC, Xiao XY, Dunwoody N, Ronn M. Process Development and Scale-up of Fully Synthetic Tetracycline TP-2758: A Potent Antibacterial Agent with Excellent Oral Bioavailability. Org Process Res Dev 2016. [DOI: 10.1021/acs.oprd.5b00404] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Wu-Yan Zhang
- Tetraphase Pharmaceuticals Inc, 480
Arsenal Street, Suite 110, Watertown, Massachusetts 02472, United States
| | - Cuixiang Sun
- Tetraphase Pharmaceuticals Inc, 480
Arsenal Street, Suite 110, Watertown, Massachusetts 02472, United States
| | - Diana Hunt
- Tetraphase Pharmaceuticals Inc, 480
Arsenal Street, Suite 110, Watertown, Massachusetts 02472, United States
| | - Minsheng He
- Tetraphase Pharmaceuticals Inc, 480
Arsenal Street, Suite 110, Watertown, Massachusetts 02472, United States
| | - Yonghong Deng
- Tetraphase Pharmaceuticals Inc, 480
Arsenal Street, Suite 110, Watertown, Massachusetts 02472, United States
| | - Zhijian Zhu
- Tetraphase Pharmaceuticals Inc, 480
Arsenal Street, Suite 110, Watertown, Massachusetts 02472, United States
| | - Chi-Li Chen
- Tetraphase Pharmaceuticals Inc, 480
Arsenal Street, Suite 110, Watertown, Massachusetts 02472, United States
| | - Christopher E. Katz
- Tetraphase Pharmaceuticals Inc, 480
Arsenal Street, Suite 110, Watertown, Massachusetts 02472, United States
| | - John Niu
- Tetraphase Pharmaceuticals Inc, 480
Arsenal Street, Suite 110, Watertown, Massachusetts 02472, United States
| | - Philip C. Hogan
- Tetraphase Pharmaceuticals Inc, 480
Arsenal Street, Suite 110, Watertown, Massachusetts 02472, United States
| | - Xiao-Yi Xiao
- Tetraphase Pharmaceuticals Inc, 480
Arsenal Street, Suite 110, Watertown, Massachusetts 02472, United States
| | - Nicholas Dunwoody
- Tetraphase Pharmaceuticals Inc, 480
Arsenal Street, Suite 110, Watertown, Massachusetts 02472, United States
| | - Magnus Ronn
- Tetraphase Pharmaceuticals Inc, 480
Arsenal Street, Suite 110, Watertown, Massachusetts 02472, United States
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21
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Haldar S, Roy SK, Maity B, Koley D, Jana CK. Regio- and Diastereoselective and Enantiospecific Metal-Free C(sp3)H Arylation: Facile Access to Optically Active 5-Aryl 2,5-Disubstituted Pyrrolidines. Chemistry 2015; 21:15290-8. [DOI: 10.1002/chem.201502297] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/12/2015] [Indexed: 12/12/2022]
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22
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Morales-Chamorro M, Meza-González J, Cordero-Vargas A. A convenient entry to indolizidine alkaloids using Kharasch type reactions. Tetrahedron Lett 2015. [DOI: 10.1016/j.tetlet.2015.06.079] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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23
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Scharnagel D, Müller A, Prause F, Eck M, Goller J, Milius W, Breuning M. The First Modular Route to Core-Chiral Bispidine Ligands and Their Application in Enantioselective Copper(II)-Catalyzed Henry Reactions. Chemistry 2015; 21:12488-500. [DOI: 10.1002/chem.201502090] [Citation(s) in RCA: 34] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/28/2015] [Indexed: 12/16/2022]
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24
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McSweeney CM, Foley VM, McGlacken GP. The asymmetric alkylation of dimethylhydrazones; intermolecular chirality transfer using sparteine as chiral ligand. Chem Commun (Camb) 2015; 50:14817-9. [PMID: 25318599 DOI: 10.1039/c4cc06895e] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The asymmetric alkylation of ketones represents a fundamental transformation in organic chemistry. Chiral auxiliaries have been used almost exclusively for this transformation. Herein we describe a strategy for the generation of enantiomerically enriched α-alkylated ketones up to an er of 83 : 17, using a chiral ligand protocol.
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Affiliation(s)
- Christina M McSweeney
- Analytical and Biological Chemistry Research Facility and Department of Chemistry, University College Cork, Cork, Ireland.
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25
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Lüthy M, Wheldon MC, Haji-Cheteh C, Atobe M, Bond PS, O’Brien P, Hubbard RE, Fairlamb IJ. Lead-oriented synthesis: Investigation of organolithium-mediated routes to 3-D scaffolds and 3-D shape analysis of a virtual lead-like library. Bioorg Med Chem 2015; 23:2680-94. [DOI: 10.1016/j.bmc.2015.04.005] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/09/2015] [Revised: 04/02/2015] [Accepted: 04/03/2015] [Indexed: 11/15/2022]
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26
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Petersen IN, Crestey F, Jensen AA, Indurthi DC, Pedersen H, Andreasen JT, Balle T, Kristensen JL. Tying up Nicotine: New Selective Competitive Antagonist of the Neuronal Nicotinic Acetylcholine Receptors. ACS Med Chem Lett 2015; 6:472-5. [PMID: 25941557 DOI: 10.1021/acsmedchemlett.5b00028] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/21/2015] [Accepted: 03/04/2015] [Indexed: 01/17/2023] Open
Abstract
Conformational restriction of the pyrrolidine nitrogen in nicotine by the introduction of an ethylene bridge provided a potent and selective antagonist of the α4β2-subtype of the nicotinic acetylcholine receptors. Resolution by chiral SFC, pharmacological characterization of the two enantiomers, and determination of absolute configuration via enantioselective synthesis showed that the pharmacological activity resided almost exclusively in the (R)-enantiomer.
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Affiliation(s)
- Ida Nymann Petersen
- Department
of Drug Design and Pharmacology, Faculty of Health and Medical Sciences, University of Copenhagen, Universitetsparken 2, 2100 Copenhagen, Denmark
| | - François Crestey
- Department
of Drug Design and Pharmacology, Faculty of Health and Medical Sciences, University of Copenhagen, Universitetsparken 2, 2100 Copenhagen, Denmark
| | - Anders A. Jensen
- Department
of Drug Design and Pharmacology, Faculty of Health and Medical Sciences, University of Copenhagen, Universitetsparken 2, 2100 Copenhagen, Denmark
| | | | - Henrik Pedersen
- Discovery Chemistry and DMPK, H.
Lundbeck A/S, Ottiliavej 9, 2500 Valby, Denmark
| | - Jesper T. Andreasen
- Department
of Drug Design and Pharmacology, Faculty of Health and Medical Sciences, University of Copenhagen, Universitetsparken 2, 2100 Copenhagen, Denmark
| | - Thomas Balle
- Faculty
of Pharmacy, University of Sydney, Sydney, NSW 2006, Australia
| | - Jesper L. Kristensen
- Department
of Drug Design and Pharmacology, Faculty of Health and Medical Sciences, University of Copenhagen, Universitetsparken 2, 2100 Copenhagen, Denmark
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27
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Li YJ, Hou CC, Chang KC. Total Synthesis of Indolizidine Alkaloids (-)-167B, (-)-209I, and (-)-223A by Using a Common Tricyclic Lactone. European J Org Chem 2015. [DOI: 10.1002/ejoc.201500028] [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]
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28
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Beng TK, Fox N, Bassler DP, Alwali A, Sincavage K, Silaire AWV. Trapping of carbolithiation-derived tertiary benzylic α-lithio piperidines with carbon electrophiles: Controlling the formation of α-amino quaternary and vicinal stereocenters. Org Biomol Chem 2015. [DOI: 10.1039/c5ob01371b] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The interception of carbolithiation-derived tertiary benzylic α-lithio piperidines with carbon electrophiles has led to the diastereoselective synthesis of vicinally functionalized piperidines bearing α-amino quaternary stereocenters.
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Affiliation(s)
| | - Nathan Fox
- Department of Chemistry
- Susquehanna University
- Selinsgrove
- USA
| | | | - Amir Alwali
- Department of Chemistry
- Susquehanna University
- Selinsgrove
- USA
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29
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Beng TK, Fox N. Diastereoselective synthesis of α,α,α′-trisubstituted pyrrolidines and piperidines by directed sequential lithiation/alkylation. Tetrahedron Lett 2015. [DOI: 10.1016/j.tetlet.2014.11.031] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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30
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Canipa SJ, Stute A, O'Brien P. Use of copper(II)/diamine catalysts in the desymmetrisation of meso-diols and asymmetric Henry reactions: comparison of (−)-sparteine and (+)-sparteine surrogates. Tetrahedron 2014. [DOI: 10.1016/j.tet.2014.06.117] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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31
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Abstract
The first total synthesis of aspeverin, a prenylated indole alkaloid isolated from Aspergillus versicolor in 2013, is described. Key steps utilized to assemble the core structure of the target include a highly diastereoselective Diels-Alder reaction, a Curtius rearrangement, and a unique strategy for installation of the geminal dimethyl group. A novel iodine(III)-initiated cyclization was then used to install the bicyclic urethane linkage distinctive to the natural product.
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Affiliation(s)
- Adam M. Levinson
- Tri-Institutional PhD Program in Chemical Biology, Laboratory for Bioorganic Chemistry, Memorial Sloan-Kettering Cancer Center, 1275 York Avenue, New York, New York 10065, United States
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32
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Rayner PJ, Gelardi G, O'Brien P, Horan RAJ, Blakemore DC. On the synthesis of α-amino sulfoxides. Org Biomol Chem 2014; 12:3499-512. [PMID: 24759885 DOI: 10.1039/c4ob00567h] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
A synthetic study on the preparation of N-Boc α-amino sulfoxides has revealed an unexpected instability which is believed to be due to α-elimination of the sulfoxide to give an iminium ion. Full synthetic details are reported on two main synthetic routes: lithiation and sulfinate trapping of N-Boc heterocycles and oxidation of N-Boc α-amino sulfides. Six novel α-amino sulfoxides were successfully prepared and isolated. It is speculated that four other α-amino sulfoxides were synthesised but could not be isolated due to their propensity to α-eliminate the sulfoxide. Ultimately, a stable, cyclic N-Boc α-amino sulfoxide was prepared and this successful synthesis relied on the α-amino sulfoxide being part of a bicyclic [3.1.0] fused ring system that could not undergo α-elimination of the sulfoxide.
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Affiliation(s)
- Peter J Rayner
- Department of Chemistry, University of York, Heslington, York YO10 5DD, UK.
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33
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Tanoury GJ, Chen M, Dong Y, Forslund R, Jurkauskas V, Jones AD, Belmont D. Stereoselective Lithiation and Carboxylation of Boc-Protected Bicyclopyrrolidine: Synthesis of a Key Building Block for HCV Protease Inhibitor Telaprevir. Org Process Res Dev 2014. [DOI: 10.1021/op500040j] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Affiliation(s)
- Gerald J. Tanoury
- Vertex Pharmaceuticals Inc., 50 Northern Avenue, Boston, Massachusetts 02210, United States
| | - Minzhang Chen
- Vertex Pharmaceuticals Inc., 50 Northern Avenue, Boston, Massachusetts 02210, United States
| | - Yong Dong
- Vertex Pharmaceuticals Inc., 50 Northern Avenue, Boston, Massachusetts 02210, United States
| | - Raymond Forslund
- Vertex Pharmaceuticals Inc., 50 Northern Avenue, Boston, Massachusetts 02210, United States
| | - Valdas Jurkauskas
- Vertex Pharmaceuticals Inc., 50 Northern Avenue, Boston, Massachusetts 02210, United States
| | - Andrew D. Jones
- Vertex Pharmaceuticals Inc., 50 Northern Avenue, Boston, Massachusetts 02210, United States
| | - Daniel Belmont
- Vertex Pharmaceuticals Inc., 50 Northern Avenue, Boston, Massachusetts 02210, United States
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34
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Affiliation(s)
- Cam-Van T. Vo
- Laboratorium
für Organische
Chemie, ETH Zürich, Vladimir Prelog Weg 1-5, Zürich, Switzerland 8093
| | - Jeffrey W. Bode
- Laboratorium
für Organische
Chemie, ETH Zürich, Vladimir Prelog Weg 1-5, Zürich, Switzerland 8093
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35
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Wan ZL, Zhang GL, Chen HJ, Wu Y, Li Y. A Chiral Pool and Cross Metathesis Based Synthesis of Gingerdiols. European J Org Chem 2014. [DOI: 10.1002/ejoc.201301727] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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36
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Hesp KD, Fernando DP, Jiao W, Londregan AT. Expedient Synthesis of α-Heteroaryl Piperidines Using a Pd-Catalyzed Suzuki Cross-Coupling–Reduction Sequence. Org Lett 2014; 16:413-5. [DOI: 10.1021/ol403367b] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
Affiliation(s)
- Kevin D. Hesp
- Pfizer
Worldwide Medicinal
Chemistry, Eastern Point
Road, Groton, Connecticut 06340, United States
| | - Dilinie P. Fernando
- Pfizer
Worldwide Medicinal
Chemistry, Eastern Point
Road, Groton, Connecticut 06340, United States
| | - Wenhua Jiao
- Pfizer
Worldwide Medicinal
Chemistry, Eastern Point
Road, Groton, Connecticut 06340, United States
| | - Allyn T. Londregan
- Pfizer
Worldwide Medicinal
Chemistry, Eastern Point
Road, Groton, Connecticut 06340, United States
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37
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Metallinos C, Iraj Sadraei S, Zhukovskaya N. Diastereoselective Lithiation of N-Silyl-Protected (S)-Tetrahydro-1H-pyrrolo[1,2-c]imidazol-3(2H)-one. HETEROCYCLES 2014. [DOI: 10.3987/com-13-s(s)29] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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38
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Deng M, Su B, Zhang H, Liu Y, Wang Q. Total synthesis of phenanthroindolizidine alkaloids via asymmetric deprotonation of N-Boc-pyrrolidine. RSC Adv 2014. [DOI: 10.1039/c3ra47465h] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023] Open
Abstract
A concise synthesis of two typical phenanthroindolizidine alkaloids via an asymmetric deprotonation/diastereoselective carbonyl addition strategy is described.
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Affiliation(s)
- Meng Deng
- State Key Laboratory of Elemento-Organic Chemistry
- Research Institute of Elemento-Organic Chemistry
- Nankai University
- Collaborative Innovation Center of Chemical Science and Engineering (Tianjin)
- Tianjin 300071, People's Republic of China
| | - Bo Su
- State Key Laboratory of Elemento-Organic Chemistry
- Research Institute of Elemento-Organic Chemistry
- Nankai University
- Collaborative Innovation Center of Chemical Science and Engineering (Tianjin)
- Tianjin 300071, People's Republic of China
| | - Hui Zhang
- State Key Laboratory of Elemento-Organic Chemistry
- Research Institute of Elemento-Organic Chemistry
- Nankai University
- Collaborative Innovation Center of Chemical Science and Engineering (Tianjin)
- Tianjin 300071, People's Republic of China
| | - Yuxiu Liu
- State Key Laboratory of Elemento-Organic Chemistry
- Research Institute of Elemento-Organic Chemistry
- Nankai University
- Collaborative Innovation Center of Chemical Science and Engineering (Tianjin)
- Tianjin 300071, People's Republic of China
| | - Qingmin Wang
- State Key Laboratory of Elemento-Organic Chemistry
- Research Institute of Elemento-Organic Chemistry
- Nankai University
- Collaborative Innovation Center of Chemical Science and Engineering (Tianjin)
- Tianjin 300071, People's Republic of China
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39
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Gelardi G, Barker G, O'Brien P, Blakemore DC. Asymmetric lithiation trapping of N-Boc heterocycles at temperatures above -78 °C. Org Lett 2013; 15:5424-7. [PMID: 24180685 DOI: 10.1021/ol402395j] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
The asymmetric lithiation trapping of N-Boc heterocycles using s-BuLi/chiral diamines at temperatures up to -20 °C is reported. Depending on the N-Boc heterocycle, lithiation is accomplished using s-BuLi and (-)-sparteine or the (+)-sparteine surrogate in the temperature range -50 to -20 °C for short reaction times (2-20 min). Subsequent electrophilic trapping or transmetalation-Negishi coupling delivered functionalized N-Boc heterocycles in 47-95% yield and 77:23-93:7 er. With N-Boc pyrrolidine, trapped products can be generated in ∼90:10 er even at -20 °C.
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Affiliation(s)
- Giacomo Gelardi
- Department of Chemistry, University of York , Heslington, York YO10 5DD, U. K., and Neusentis Chemistry, Pfizer Worldwide Research and Development , The Portway Building, Granta Park, Cambridge CB21 6GS, U. K
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40
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Breuning M, Hein D. 5-Substituted Derivatives of the Tricyclic (+)-Sparteine Surrogate in the Enantioselective Lithiation/Stannylation of anO-Alkyl Carbamate. European J Org Chem 2013. [DOI: 10.1002/ejoc.201300987] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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41
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Mansueto R, Perna FM, Salomone A, Florio S, Capriati V. Dynamic resolution of lithiated ortho-trifluoromethyl styrene oxide and the effect of chiral diamines on the barrier to enantiomerisation. Chem Commun (Camb) 2013; 49:4911-3. [PMID: 23478355 DOI: 10.1039/c3cc40988k] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The first dynamic thermodynamic resolution of a racemic oxiranyllithium is described with selectivities of up to 82 : 18 from a selection of three types of chiral ligands (seven ligands in total). Both (-)-sparteine and its (+)-surrogate were surprisingly found to increase the enantiomerisation barrier.
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Affiliation(s)
- Rosmara Mansueto
- Dipartimento di Farmacia-Scienze del Farmaco, Università di Bari Aldo Moro, Consorzio C.I.N.M.P.I.S., via E. Orabona 4, I-70125 Bari, Italy
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42
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Rayner PJ, O'Brien P, Horan RAJ. Preparation and reactions of enantiomerically pure α-functionalized Grignard reagents. J Am Chem Soc 2013; 135:8071-7. [PMID: 23647498 DOI: 10.1021/ja4033956] [Citation(s) in RCA: 45] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
Abstract
A strategy for the generation of enantiomerically pure α-functionalized chiral Grignard reagents is presented. The approach involves the synthesis of α-alkoxy and α-amino sulfoxides in ≥99:1 dr and ≥99:1 er via asymmetric deprotonation (s-BuLi/chiral diamine) and trapping with Andersen's sulfinate (menthol derived). Subsequent sulfoxide → Mg exchange (room temperature, 1 min) and electrophilic trapping delivers a range of enantiomerically pure α-alkoxy and α-amino substituted products. Using this approach, either enantiomer of products can be accessed in 99:1 er from asymmetric deprotonation protocols without the use of (-)-sparteine as the chiral ligand. Two additional discoveries are noteworthy: (i) for the deprotonation and trapping with Andersen's sulfinate, there is a lack of stereospecificity at sulfur due to attack of a lithiated intermediate onto the α-alkoxy and α-amino sulfoxides as they form, and (ii) the α-alkoxy-substituted Grignard reagent is configurationally stable at room temperature for 30 min.
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Affiliation(s)
- Peter J Rayner
- Department of Chemistry, University of York, Heslington, York YO10 5DD, United Kingdom
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43
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Aznar R, Grabulosa A, Mannu A, Muller G, Sainz D, Moreno V, Font-Bardia M, Calvet T, Lorenzo J. [RuCl2(η6-p-cymene)(P*)] and [RuCl2(κ-P*-η6-arene)] Complexes Containing P-Stereogenic Phosphines. Activity in Transfer Hydrogenation and Interactions with DNA. Organometallics 2013. [DOI: 10.1021/om3012294] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Rosario Aznar
- Departament de Quı́mica Inorgànica, Universitat de Barcelona, Martí
i Franquès 1-11, E-08028 Barcelona, Spain
| | - Arnald Grabulosa
- Departament de Quı́mica Inorgànica, Universitat de Barcelona, Martí
i Franquès 1-11, E-08028 Barcelona, Spain
| | - Alberto Mannu
- Departament de Quı́mica Inorgànica, Universitat de Barcelona, Martí
i Franquès 1-11, E-08028 Barcelona, Spain
- Istituto
di Chimica Biomolecolare, CNR, trav. La Crucca 3, 07100, Sassari, Italy
| | - Guillermo Muller
- Departament de Quı́mica Inorgànica, Universitat de Barcelona, Martí
i Franquès 1-11, E-08028 Barcelona, Spain
| | - Daniel Sainz
- Departament de Quı́mica Inorgànica, Universitat de Barcelona, Martí
i Franquès 1-11, E-08028 Barcelona, Spain
| | - Virtudes Moreno
- Departament de Quı́mica Inorgànica, Universitat de Barcelona, Martí
i Franquès 1-11, E-08028 Barcelona, Spain
| | - Mercè Font-Bardia
- Departament de Crystal·lografia,
Mineralogia i Dipòsits
Minerals, Universitat de Barcelona, Martı́ i Franquès s/n, E-08028 Barcelona, Spain
| | - Teresa Calvet
- Departament de Crystal·lografia,
Mineralogia i Dipòsits
Minerals, Universitat de Barcelona, Martı́ i Franquès s/n, E-08028 Barcelona, Spain
| | - Julia Lorenzo
- Institut de Biotecnologia i de Biomedicina, Universitat Autònoma de Barcelona, 08193 Bellaterra,
Barcelona, Spain
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44
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Shen YH, Ye Q, Hou SG, Wang Q. An Efficient Synthesis of Enantiomerically Pure trans-N1,N2-dimethylcyclohexane-1,2-diamine. JOURNAL OF CHEMICAL RESEARCH 2013. [DOI: 10.3184/174751913x13626731204890] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
A new pathway is described to produce a highly optically pure isomer of trans-N1,N2-dimethylcyclohexane-1,2-diamine through four simple steps. Reaction of cyclohexene oxide with aqueous methylamine, followed by cyclisation with Mitsunobu reagent and ring-opening reactions gave rac-trans- N1,N2-dimethylcyclohexane-1,2-diamine, and the enantiomers were obtained via a kinetic resolution using tartaric acid.
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Affiliation(s)
- Yan-Hong Shen
- Department of Chemical Engineering, Anyang Institute of Technology, Anyang 455000, P. R. China
| | - Qing Ye
- State Key Laboratory Breeding Base of Green Chemistry-Synthesis Technology, Zhejiang University of Technology, Hangzhou 310032, P. R. China
| | - Shao-Gang Hou
- Department of Chemical Engineering, Anyang Institute of Technology, Anyang 455000, P. R. China
| | - Qun Wang
- Department of Chemical Engineering, Anyang Institute of Technology, Anyang 455000, P. R. China
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45
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46
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Lee M, Lee YJ, Park E, Park Y, Ha MW, Hong S, Lee YJ, Kim TS, Kim MH, Park HG. Highly enantioselective synthesis of 5-phenyl-2-alkylprolines using phase-transfer catalytic alkylation. Org Biomol Chem 2013; 11:2039-46. [DOI: 10.1039/c3ob27089k] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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47
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Zhao X, Jie Y, Rosenberg MR, Wan J, Zeng S, Cui W, Xiao Y, Li Z, Tu Z, Casarotto MG, Hu W. Design and synthesis of pinanamine derivatives as anti-influenza A M2 ion channel inhibitors. Antiviral Res 2012; 96:91-9. [PMID: 22982118 DOI: 10.1016/j.antiviral.2012.09.001] [Citation(s) in RCA: 41] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/08/2012] [Revised: 08/29/2012] [Accepted: 09/03/2012] [Indexed: 01/30/2023]
Abstract
The adamantanes are a class of anti-influenza drugs that inhibit the M2 ion channel of the influenza A virus. However recently, the clinical effectiveness of these drugs has been called into question due to the emergence of adamantane-insensitive A/M2 mutants. Although we previously reported (1R,2R,3R,5S)-3-pinanamine 3 as a novel inhibitor of the wild type influenza A virus M2 protein (WT A/M2), limited inhibition was found for adamantane-resistant M2 mutants. In this study, we explored whether newly synthesized pinanamine derivatives were capable of inhibiting WT A/M2 and selected adamantane-resistant M2 mutants. Several imidazole and guanazole derivatives of pinanamine were found to inhibit WT A/M2 to a comparable degree as amantadine and one of these compounds 12 exhibits weak inhibition of A/M2-S31N mutant and it is marginally more effective in inhibiting S31NM2 than amantadine. This study provides a new insight into the structural nature of drugs required to inhibit WT A/M2 and its mutants.
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Affiliation(s)
- Xin Zhao
- Guangzhou Institutes of Biomedicine and Health, Chinese Academy of Sciences, Guangzhou, Guangdong 510530, People's Republic of China
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48
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Mitchell EA, Peschiulli A, Lefevre N, Meerpoel L, Maes BUW. Direct α-Functionalization of Saturated Cyclic Amines. Chemistry 2012; 18:10092-142. [DOI: 10.1002/chem.201201539] [Citation(s) in RCA: 356] [Impact Index Per Article: 29.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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49
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Min T, Fettinger JC, Franz AK. Enantiocontrol with a Hydrogen-bond Directing Pyrrolidinylsilanol Catalyst. ACS Catal 2012. [DOI: 10.1021/cs300290j] [Citation(s) in RCA: 41] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Affiliation(s)
- Taewoo Min
- Department
of Chemistry, University of California, One Shields Avenue, Davis, California 95616,
United States
| | - James C. Fettinger
- Department
of Chemistry, University of California, One Shields Avenue, Davis, California 95616,
United States
| | - Annaliese K. Franz
- Department
of Chemistry, University of California, One Shields Avenue, Davis, California 95616,
United States
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50
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Praz J, Guénée L, Aziz S, Berkessel A, Alexakis A. Evaluation of the Chiral DIANANE Backbone as Ligand for Organolithium Reagents. Adv Synth Catal 2012. [DOI: 10.1002/adsc.201101016] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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