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Abstract
A few months before the COVID-19 pandemic, Pierre Vogel and Kendall N. Houk published with a new textbook Wiley-VCH, “Organic Chemistry: Theory, Reactivity, and Mechanisms in Modern Synthesis”, with a foreword from the late Roberts H. Grubbs. The book demonstrates how catalytic processes dominate all fields of modern organic chemistry and synthesis, and how invention combines thermodynamics, kinetics, spectroscopy, quantum mechanics, and thermochemical data libraries. Here, the authors present a few case studies that should be of interest to teachers, practitioners of organic and organometallic chemistry, and the engineers of molecules. The Vogel–Houk book is both textbook and reference manual; it provides a modern way to think about chemical reactivity and a powerful toolbox to inventors of new reactions and new procedures.
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Padma R, Srinivas B, Yadav JS, Mohapatra DK. General Asymmetric Synthetic Strategy for the α-Alkylated 2,5,6-Trisubstituted Pyran of Indanomycin and Related Natural Products. European J Org Chem 2020. [DOI: 10.1002/ejoc.202000156] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Ravishetty Padma
- Department of Organic Synthesis and Process Chemistry; CSIR-Indian Institute of Chemical Technology; 500 007 Hyderabad India
| | - Beduru Srinivas
- Department of Organic Synthesis and Process Chemistry; CSIR-Indian Institute of Chemical Technology; 500 007 Hyderabad India
| | - Jhillu S. Yadav
- Department of Organic Synthesis and Process Chemistry; CSIR-Indian Institute of Chemical Technology; 500 007 Hyderabad India
- School of Science; Indrashil University; Kadi Gujarat India
| | - Debendra K. Mohapatra
- Department of Organic Synthesis and Process Chemistry; CSIR-Indian Institute of Chemical Technology; 500 007 Hyderabad India
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Kristianslund R, Tungen JE, Hansen TV. Catalytic enantioselective iodolactonization reactions. Org Biomol Chem 2019; 17:3079-3092. [PMID: 30806424 DOI: 10.1039/c8ob03160f] [Citation(s) in RCA: 35] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
The halolactonization reaction is a useful chemical transformation for the construction of lactones from γ- or δ-substituted alkenoic carboxylic acids or carboxylic esters. Traditionally, the stereoselectivity of these reactions has been controlled by the substrates or the reagents. The substrate-controlled method has been extensively studied and applied in the synthesis of many natural products. However, catalytic, enantioselective iodolactonizations of γ- or δ-substituted alkenoic carboxylic acids have only recently been developed. This review article highlights the advances that have emerged over the last decade.
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Affiliation(s)
- Renate Kristianslund
- School of Pharmacy, Department of Pharmaceutical Chemistry, University of Oslo, PO Box 1068 Blindern, N-0316 Oslo, Norway.
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Saito F, Trapp N, Bode JW. Iterative Assembly of Polycyclic Saturated Heterocycles from Monomeric Building Blocks. J Am Chem Soc 2019; 141:5544-5554. [PMID: 30845799 DOI: 10.1021/jacs.9b01537] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
Polycyclic saturated heterocycles with predictable shapes and structures are assembled by iterative couplings of bifunctional stannyl amine protocol (SnAP) reagents and a single morpholine-forming assembly reaction. Combinations of just a few monomers enable the programmable construction of rotationally restricted, nonplanar heterocyclic arrays with discrete sizes and molecular shapes. The three-dimensional structures of these constrained scaffolds can be quickly and reliably predicted by DFT calculations and the target structures immediately decompiled into the constituent building blocks and assembly sequences. As a demonstration, in silico combinations of the building blocks predict saturated heptacyclic structures with elementary shapes including helices, S-turns and U-turns, which are synthesized in 5-6 steps from the monomers using just three chemical reactions.
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Affiliation(s)
- Fumito Saito
- Laboratorium für Organische Chemie, Department of Chemistry and Applied Biosciences , ETH-Zürich , 8093 Zürich , Switzerland
| | - Nils Trapp
- Laboratorium für Organische Chemie, Department of Chemistry and Applied Biosciences , ETH-Zürich , 8093 Zürich , Switzerland
| | - Jeffrey W Bode
- Laboratorium für Organische Chemie, Department of Chemistry and Applied Biosciences , ETH-Zürich , 8093 Zürich , Switzerland
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Kang S, Lee W, Jung B, Lee HS, Kang SH. Stereocontrolled Synthesis of the C1-C10 Fragments of Monensin B and Laidlomycin. ASIAN J ORG CHEM 2015. [DOI: 10.1002/ajoc.201500078] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Sungkyoung Kang
- Molecular-Level Interface Research Center (MIRC); Department of Chemistry; KAIST; Daejeon 305-701 Korea
| | - Wonchul Lee
- Molecular-Level Interface Research Center (MIRC); Department of Chemistry; KAIST; Daejeon 305-701 Korea
| | | | - Hee-Seung Lee
- Molecular-Level Interface Research Center (MIRC); Department of Chemistry; KAIST; Daejeon 305-701 Korea
| | - Sung Ho Kang
- Molecular-Level Interface Research Center (MIRC); Department of Chemistry; KAIST; Daejeon 305-701 Korea
- Center for New Directions in Organic Synthesis (CNOS); Department of Chemistry; Hanyang University; Seoul 133-791 Korea
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Li XW, Ear A, Nay B. Hirsutellones and beyond: figuring out the biological and synthetic logics toward chemical complexity in fungal PKS-NRPS compounds. Nat Prod Rep 2013; 30:765-82. [PMID: 23640165 DOI: 10.1039/c3np70016j] [Citation(s) in RCA: 43] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Covering: up to early 2013. Fungal polyketides and their hybrid non ribosomal peptide derivatives are characterized by often striking structural features and biological activities. Their diversity and their complexity arise from highly organized and programmable biosynthetic pathways and have been challenged by many synthetic chemists. This review will conceptually illustrate how complexity can be generated, starting from a general biosynthetic purpose (the fundaments of PKS-NRPS assembly lines) and finally showing how the particular class of hirsutellone compounds has emerged from such processes in relation to post-elongation and secondary tailoring events. Synthetic efforts to produce these natural products will be described with a special emphasis on complexity-generating strategies and steps. Thus, the biosynthetic and synthetic works will be analyzed in a continuous flow, focusing on both the logic of Nature and organic chemists.
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Affiliation(s)
- Xu-Wen Li
- Muséum National d'Histoire Naturelle, Molécules de Communication et Adaptation des Micro-organismes (UMR 7245 CNRS-MNHN), 57 rue Cuvier (CP 54), 75005 Paris, France
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Structure and antimicrobial properties of monensin A and its derivatives: summary of the achievements. BIOMED RESEARCH INTERNATIONAL 2013; 2013:742149. [PMID: 23509771 PMCID: PMC3586448 DOI: 10.1155/2013/742149] [Citation(s) in RCA: 46] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/29/2012] [Revised: 12/15/2012] [Accepted: 12/29/2012] [Indexed: 11/30/2022]
Abstract
In this paper structural and microbiological studies on the ionophorous antibiotic monensin A and its derivatives have been collected. Monensin A is an ionophore which selectively complexes and transports sodium cation across lipid membranes, and therefore it shows a variety of biological properties. This antibiotic is commonly used as coccidiostat and nonhormonal growth promoter. The paper focuses on both the latest and earlier achievements concerning monensin A antimicrobial activity. The activities of monensin derivatives, including modifications of hydroxyl groups and carboxyl group, are also presented.
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Devalankar DA, Karabal PU, Sudalai A. Optically pure γ-butyrolactones and epoxy esters via two stereocentered HKR of 3-substituted epoxy esters: a formal synthesis of (−)-paroxetine, Ro 67-8867 and (+)-eldanolide. Org Biomol Chem 2013; 11:1280-5. [DOI: 10.1039/c3ob27321k] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Uchiro H, Kato R, Sakuma Y, Takagi Y, Arai Y, Hasegawa D. Synthetic studies of GKK1032s: the asymmetric synthesis of the decahydrofluorene skeleton via a novel cyclization of silyl enol ether and sequential retro Diels–Alder and intramolecular Diels–Alder reactions. Tetrahedron Lett 2011. [DOI: 10.1016/j.tetlet.2011.09.069] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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Pratihar S, Roy S. Reactivity and Selectivity of Organotin Reagents in Allylation and Arylation: Nucleophilicity Parameter as a Guide. Organometallics 2011. [DOI: 10.1021/om101030c] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
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Nielsen M, Jacobsen CB, Paixão MW, Holub N, Jørgensen KA. Asymmetric Organocatalytic Formal Alkynylation and Alkenylation of α,β-Unsaturated Aldehydes. J Am Chem Soc 2009; 131:10581-6. [DOI: 10.1021/ja903920j] [Citation(s) in RCA: 93] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Martin Nielsen
- Center for Catalysis, Department of Chemistry, Aarhus University, DK-8000 Aarhus C, Denmark
| | | | - Márcio W. Paixão
- Center for Catalysis, Department of Chemistry, Aarhus University, DK-8000 Aarhus C, Denmark
| | - Nicole Holub
- Center for Catalysis, Department of Chemistry, Aarhus University, DK-8000 Aarhus C, Denmark
| | - Karl Anker Jørgensen
- Center for Catalysis, Department of Chemistry, Aarhus University, DK-8000 Aarhus C, Denmark
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Asymmetric synthesis of chiral Roche ester and its derivatives via Rh-catalyzed enantioselective hydrogenation with chiral phosphine-phosphoramidite ligands. ACTA ACUST UNITED AC 2009. [DOI: 10.1016/j.tetasy.2008.12.026] [Citation(s) in RCA: 29] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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Jones JB. An illustrative example of a synthetically useful enzyme: horse liver alcohol dehydrogenase. CIBA FOUNDATION SYMPOSIUM 2008; 111:3-21. [PMID: 3160565 DOI: 10.1002/9780470720929.ch2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
Abstract
The enzymes of most general and continuing value in organic synthesis are those that can operate stereospecifically on a wide range of structurally varied substrates. Horse liver alcohol dehydrogenase (HLADH, EC 1.1.1.1), a commercially available NAD(H)-dependent oxidoreductase that catalyses C = O in equilibrium CH(OH) interconversions, is such an enzyme. The scope of applications of enzymes endowed with this degree of versatility is illustrated by the preparative-scale use of HLADH to catalyse specific oxidoreductions of a broad spectrum of alcohol and ketone substrates. Examples are given of enantiomeric distinctions, of discrimination between enantiotopic groups in substrates possessing prochiral centres or in meso compounds, of regiospecific transformations and of combinations of various specificities. The value of the enzyme-derived products as chiral synthetic precursors of molecules of current interest is demonstrated.
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Wang YF, Chen CS, Girdaukas G, Sih CJ. Extending the applicability of esterases of low enantioselectivity in asymmetric synthesis. CIBA FOUNDATION SYMPOSIUM 2008; 111:128-45. [PMID: 3848376 DOI: 10.1002/9780470720929.ch10] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Abstract
A strategy for expanding the applicability of esterases of low enantioselectivity for asymmetric synthesis is described. This concept is generally applicable to biochemical processes involving enantiotopic group differentiation. Quantitative expressions have been derived to permit the prediction of enantiomeric excess and the optimization of optical and chemical yields.
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Evans DA, Nelson JV, Taber TR. Stereoselective Aldol Condensations. TOPICS IN STEREOCHEMISTRY 2007. [DOI: 10.1002/9780470147221.ch1] [Citation(s) in RCA: 335] [Impact Index Per Article: 19.7] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/03/2022]
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Affiliation(s)
- John P. Wolfe
- Department of Chemistry, University of Michigan, 930 N. University Avenue, Ann Arbor, MI, 48109-1055
| | - Michael B. Hay
- Department of Chemistry, University of Michigan, 930 N. University Avenue, Ann Arbor, MI, 48109-1055
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Abstract
An effective, readily scalable two-step synthesis of trisubstituted (E)-vinyl bromides involving bromination of alpha,beta-unsaturated lactones followed by hydrolytic fragmentation has been developed. Several trisubstituted (E)-vinyl bromides, including multigram quantities of (+)-(E)-4-bromo-2-methyl-3-pentenol, a synthetic intermediate required for the C(8)-C(11) moieties of (+)-tedanolide (1) and (+)-13-deoxytedanolide (2), illustrate the utility of this protocol. [reaction: see text]
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Affiliation(s)
- Cheon-Gyu Cho
- Department of Chemistry, Hanyang University, Seoul, Korea 133-791.
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Nicolaou KC, Pihko PM, Bernal F, Frederick MO, Qian W, Uesaka N, Diedrichs N, Hinrichs J, Koftis TV, Loizidou E, Petrovic G, Rodriquez M, Sarlah D, Zou N. Total Synthesis and Structural Elucidation of Azaspiracid-1. Construction of Key Building Blocks for Originally Proposed Structure. J Am Chem Soc 2006; 128:2244-57. [PMID: 16478178 DOI: 10.1021/ja0547477] [Citation(s) in RCA: 62] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Syntheses of the three key building blocks (65, 98, and 100) required for the total synthesis of the proposed structure of azaspiracid-1 (1a) are described. Key steps include a TMSOTf-induced ring-closing cascade to form the ABC rings of tetracycle 65, a neodymium-catalyzed internal aminal formation for the construction of intermediate 98, and a Nozaki-Hiyama-Kishi coupling to assemble the required carbon chain of fragment 100. The synthesized fragments, obtained stereoselectively in both their enantiomeric forms, were expected to allow for the construction of all four stereoisomers proposed as possible structures of azaspiracid-1 (1a-d), thus allowing the determination of both the relative and absolute stereochemistry of the natural product.
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Affiliation(s)
- K C Nicolaou
- Department of Chemistry and The Skaggs Institute for Chemical Biology, The Scripps Research Institute, 10550 North Torrey Pines Road, La Jolla, CA 92037, USA.
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Hoppe D, Lichtenberg F. Diastereoselektive Homoaldol-Reaktion mit einer (1-Oxycrotyl)aluminium-Verbindung, einem Homoenolat-Äquivalent des n-Butanals. Angew Chem Int Ed Engl 2006. [DOI: 10.1002/ange.19820940518] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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Bekish AV, Kulinkovich OG. Differentiation between the ethoxycarbonyl groups in diethyl malate via their titanium-catalyzed reductive cyclopropanation with ethylmagnesium bromide and subsequent site-selective three-carbon ring cleavage. Tetrahedron Lett 2005. [DOI: 10.1016/j.tetlet.2005.08.076] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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Kiegiel K, Bałakier T, Kwiatkowski P, Jurczak J. Diastereoselective allylation of N-glyoxyloyl-(2R)-bornane-10,2-sultam and (1R)-8-phenylmenthyl glyoxylate: synthesis of (2S,4S)-2-hydroxy-4-hydroxymethyl-4-butanolide. ACTA ACUST UNITED AC 2004. [DOI: 10.1016/j.tetasy.2004.10.025] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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Zhao C, Lu J, Yan J, Xi Z. One-pot four-component synthesis of tetrahydrofuran derivatives involving an alkyne, an ethylene and two aldehydes via CuCl-mediated reactions of oxazirconacyclopentenes with aldehydes. Tetrahedron Lett 2003. [DOI: 10.1016/s0040-4039(03)01741-6] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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Mulzer J, Ohler E. Microtubule-stabilizing marine metabolite laulimalide and its derivatives: synthetic approaches and antitumor activity. Chem Rev 2003; 103:3753-86. [PMID: 12964883 DOI: 10.1021/cr940368c] [Citation(s) in RCA: 72] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Johann Mulzer
- Institut für Organische Chemie der Universität Wien, Währinger Strasse 38, A-1090 Vienna, Austria.
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Tomioka K, Iida A, Konishi K, Matsumoto H, Kaneko M. Stereoselective Synthesis of the Optically Pure AB-Ring Moiety of Trichothecene Sesquiterpene (+)-Calonectrin. HETEROCYCLES 2003. [DOI: 10.3987/com-02-s58] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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Mulzer J, Öhler E. An Intramolecular Case of Sharpless Kinetic Resolution: Total Synthesis of Laulimalide. Angew Chem Int Ed Engl 2001; 40:3842-3846. [DOI: 10.1002/1521-3773(20011015)40:20<3842::aid-anie3842>3.0.co;2-r] [Citation(s) in RCA: 59] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/11/2001] [Indexed: 11/11/2022]
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Kiyooka SI, Li YN, Shahid KA, Okazaki M, Shuto Y. Versatile, high 2,4- syn dialkyl diastereoselection in the radical debromination of α-bromo-α-methyl-δ-valerolactones with tri- n -butyltin hydride and a catalytic amount of triethylborane. Tetrahedron Lett 2001. [DOI: 10.1016/s0040-4039(01)01507-6] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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Nazaré M, Waldmann H. Synthesis of the (9S,18R)-seco acid of the leukocyte adhesion inhibitor cyclamenol A. Tetrahedron Lett 2000. [DOI: 10.1016/s0040-4039(99)02135-8] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
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Delle Monache G, Misiti D, Zappia G. A stereocontrolled synthesis of (−)-detoxinine from l-ascorbic acid. ACTA ACUST UNITED AC 1999. [DOI: 10.1016/s0957-4166(99)00316-x] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
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Baxter AD, Bhogal R, Bird JB, Buckley GM, Gregory DS, Hedger PC, Manallack DT, Massil T, Minton KJ, Montana JG, Neidle S, Owen DA, Watson RJ. Mercaptoacyl matrix metalloproteinase inhibitors: The effect of substitution at the mercaptoacyl moiety. Bioorg Med Chem Lett 1997. [DOI: 10.1016/s0960-894x(97)10069-5] [Citation(s) in RCA: 18] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Burton JW, Clark JS, Derrer S, Stork TC, Bendall JG, Holmes AB. Synthesis of Medium Ring Ethers. 5. The Synthesis of (+)-Laurencin. J Am Chem Soc 1997. [DOI: 10.1021/ja9709132] [Citation(s) in RCA: 110] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Jonathan W. Burton
- Contribution from the Department of Chemistry, University Chemical Laboratory, Lensfield Road, Cambridge CB2 1EW U.K
| | - J. Stephen Clark
- Contribution from the Department of Chemistry, University Chemical Laboratory, Lensfield Road, Cambridge CB2 1EW U.K
| | - Sam Derrer
- Contribution from the Department of Chemistry, University Chemical Laboratory, Lensfield Road, Cambridge CB2 1EW U.K
| | - Thomas C. Stork
- Contribution from the Department of Chemistry, University Chemical Laboratory, Lensfield Road, Cambridge CB2 1EW U.K
| | - Justin G. Bendall
- Contribution from the Department of Chemistry, University Chemical Laboratory, Lensfield Road, Cambridge CB2 1EW U.K
| | - Andrew B. Holmes
- Contribution from the Department of Chemistry, University Chemical Laboratory, Lensfield Road, Cambridge CB2 1EW U.K
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Andrus MB, Li W, Keyes RF. Synthesis of Microcolin B, a Potent New Immunosuppressant Using an Efficient Mixed Imide Formation Reaction. J Org Chem 1997. [DOI: 10.1021/jo970387x] [Citation(s) in RCA: 65] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Merritt B. Andrus
- Purdue University, Department of Chemistry, 1393 Brown Building, West Lafayette, Indiana 47907
| | - Wenke Li
- Purdue University, Department of Chemistry, 1393 Brown Building, West Lafayette, Indiana 47907
| | - Robert F. Keyes
- Purdue University, Department of Chemistry, 1393 Brown Building, West Lafayette, Indiana 47907
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Kim HO, Lum C, Lee MS. Malic acid: A convenient precursor for the synthesis of peptide secondary structure mimetics. Tetrahedron Lett 1997. [DOI: 10.1016/s0040-4039(97)01083-6] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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Imogaï H, Larchevêque M. A general approach towards 2-substituted 3-hydroxy propanoates; application to the synthesis of methyl tropinate. ACTA ACUST UNITED AC 1997. [DOI: 10.1016/s0957-4166(97)00063-3] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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Saponaceolides: Differential cytotoxicity and enantioselective synthesis of the right-hand lactone moiety. ACTA ACUST UNITED AC 1995. [DOI: 10.1016/0957-4166(95)00371-1] [Citation(s) in RCA: 21] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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Stereochemistry of remote dianion addition to imines. Application to the synthesis of (1S, 8aS)-1-hydroxyindolizidine. Tetrahedron 1995. [DOI: 10.1016/0040-4020(95)00037-9] [Citation(s) in RCA: 30] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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Araki K, Yun WQ, O'Toole J, Toscano PJ, Welch JT. The synthesis of 2,3-dideoxy-2-fluoro-3-C-methylpentose-containing nucleosides via [3,3]-sigmatropic rearrangements. Carbohydr Res 1993; 249:139-61. [PMID: 8252552 DOI: 10.1016/0008-6215(93)84067-g] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
Abstract
[3,3]-Sigmatropic rearrangement of in situ-formed [O,O]-silyl ketene acetals of butenyl fluoroacetates was used as the key step in the synthesis of racemic 2,3-dideoxy-2-fluoro-3-C-methylpentofuranoses. The product pentofuranoses were transformed further into pyrimidine and purine nucleosides. The conformations of the synthetic carbohydrates were confirmed by single-crystal X-ray diffraction studies and indicated that previous structural assignments made by NMR were in error.
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Affiliation(s)
- K Araki
- Department of Chemistry, University at Albany, SUNY 12222
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