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Cież D, Pałasz A, Trzewik B. Titanium Enolate Chemistry at the Beginning of the 21st Century. European J Org Chem 2016. [DOI: 10.1002/ejoc.201501398] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
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2
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Mahlau M, García-García P, List B. Asymmetric Counteranion-Directed Catalytic Hosomi-Sakurai Reaction. Chemistry 2012. [DOI: 10.1002/chem.201203623] [Citation(s) in RCA: 71] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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Li Z, Plancq B, Ollevier T. Bismuth Triflate-Catalyzed Asymmetric Allylation of Aromatic Aldehydes. Chemistry 2012; 18:3144-7. [DOI: 10.1002/chem.201103646] [Citation(s) in RCA: 45] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/18/2011] [Indexed: 12/15/2022]
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Amans D, Bellosta V, Dacquet C, Ktorza A, Hennuyer N, Staels B, Caignard DH, Cossy J. Synthesis and evaluation of new polyenic compounds as potential PPARs modulators. Org Biomol Chem 2012; 10:6169-85. [DOI: 10.1039/c2ob25593f] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Schmidt T, Kirschning A. Totalsynthese von Carolacton, einem hochwirksamen Inhibitor von Biofilmen. Angew Chem Int Ed Engl 2011. [DOI: 10.1002/ange.201106762] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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Schmidt T, Kirschning A. Total synthesis of carolacton, a highly potent biofilm inhibitor. Angew Chem Int Ed Engl 2011; 51:1063-6. [PMID: 22162345 DOI: 10.1002/anie.201106762] [Citation(s) in RCA: 47] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/23/2011] [Revised: 10/22/2011] [Indexed: 11/11/2022]
Affiliation(s)
- Thomas Schmidt
- Institut für Organische Chemie und Zntrum für Biomolekulare Wirkstoffe (BMWZ), Leibniz Universität Hannover, Schneiderberg 1B, 30167 Hannover, Germany
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Marrone A, Renzetti A, De Maria P, Gérard S, Sapi J, Fontana A, Re N. Condensation of beta-diester titanium enolates with carbonyl substrates: a combined DFT and experimental investigation. Chemistry 2010; 15:11537-50. [PMID: 19777518 DOI: 10.1002/chem.200901595] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
The condensation of dialkyl beta-diesters with various aldehydes promoted by TiCl4 has been studied by DFT approaches and experimental methods, including NMR, IR and UV/Vis spectroscopy. Various possible reaction pathways have been investigated and their energy profiles evaluated to find out a plausible mechanism of the reaction. Theoretical results and experimental evidence point to a three-step mechanism: 1) Ti-induced formation of the enolate ion; 2) aldol reaction between the enolate ion and the aldehyde, both coordinated to titanium; and 3) intramolecular elimination that leads to a titanyl complex. The presented mechanistic hypothesis allows one to better understand the pivotal role of titanium(IV) in the reaction.
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Affiliation(s)
- Alessandro Marrone
- Dipartimento di Scienze del Farmaco, Università degli Studi G. d'Annunzio di Chieti-Pescara, Via dei Vestini, 66100 Chieti, Italy
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Zhang Y, Jia X, Wang JX. The Solvent-Free Addition Reaction of Allylzinc Bromide and Carbonyl Compounds. European J Org Chem 2009. [DOI: 10.1002/ejoc.200900059] [Citation(s) in RCA: 17] [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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Amans D, Bellosta V, Cossy J. Synthesis of two bioactive natural products: FR252921 and pseudotrienic acid B. Chemistry 2009; 15:3457-73. [PMID: 19219867 DOI: 10.1002/chem.200802649] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
Concise and highly convergent syntheses of the immunosuppressive agent FR252921 and the related antimicrobial natural product pseudotrienic acid B were achieved from a common intermediate by using optically active titanium complexes to control the configuration of the stereogenic centers, a highly stereo- and regioselective cross-metathesis to generate the triene moieties, and a Stille cross-coupling to install the dienic units.
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Affiliation(s)
- Dominique Amans
- Laboratoire de Chimie Organique, ESPCI ParisTech, CNRS, 10 rue Vauquelin, 75231 Paris, France
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Bower JF, Kim IS, Patman RL, Krische MJ. Catalytic carbonyl addition through transfer hydrogenation: a departure from preformed organometallic reagents. Angew Chem Int Ed Engl 2009; 48:34-46. [PMID: 19040235 PMCID: PMC2775511 DOI: 10.1002/anie.200802938] [Citation(s) in RCA: 260] [Impact Index Per Article: 17.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Abstract
Classical protocols for carbonyl allylation, propargylation and vinylation typically rely upon the use of preformed allyl metal, allenyl metal and vinyl metal reagents, respectively, mandating stoichiometric generation of metallic byproducts. Through transfer hydrogenative C-C coupling, however, carbonyl addition may be achieved from the aldehyde or alcohol oxidation level in the absence of stoichiometric organometallic reagents or metallic reductants. Here, we review transfer hydrogenative methods for carbonyl addition, which encompass the first catalytic protocols enabling direct C-H functionalization of alcohols.
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Affiliation(s)
- John F. Bower
- University of Texas at Austin, Department of Chemistry and Biochemistry, 1 University Station – A5300, Austin, TX 78712-1167 (USA)
| | - In Su Kim
- University of Texas at Austin, Department of Chemistry and Biochemistry, 1 University Station – A5300, Austin, TX 78712-1167 (USA)
| | - Ryan L. Patman
- University of Texas at Austin, Department of Chemistry and Biochemistry, 1 University Station – A5300, Austin, TX 78712-1167 (USA)
| | - Michael J. Krische
- University of Texas at Austin, Department of Chemistry and Biochemistry, 1 University Station – A5300, Austin, TX 78712-1167 (USA)
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Bower J, Kim I, Patman R, Krische M. Katalytische Carbonyladdition durch Transferhydrierung: weg von vorab gebildeten Organometallreagentien. Angew Chem Int Ed Engl 2008. [DOI: 10.1002/ange.200802938] [Citation(s) in RCA: 97] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
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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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Dommisse A, Wirtz J, Koch K, Barthlott W, Kolter T. Synthesis of (S)-Nonacosan-10-ol, the Major Component of Tubular Plant Wax Crystals. European J Org Chem 2007. [DOI: 10.1002/ejoc.200700262] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
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Alexeev Y, Vasilchenko I, Kharisov B, Blanco L, Garnovskii A, Zhdanov Y. Review: synthetically modified carbohydrates as ligands. J COORD CHEM 2006. [DOI: 10.1080/00958970412331297523] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
Affiliation(s)
- Yu.E. Alexeev
- a Institute of Physical and Organic Chemistry , Rostov State University , Rostov-on-Don, 344090, Russia
- b South Scientific Center of Russian Academy of Sciences , 344006 Rostov-on-Don, Chekhova st. 4.1, Russia
| | - I.S. Vasilchenko
- a Institute of Physical and Organic Chemistry , Rostov State University , Rostov-on-Don, 344090, Russia
- b South Scientific Center of Russian Academy of Sciences , 344006 Rostov-on-Don, Chekhova st. 4.1, Russia
| | - B.I. Kharisov
- c Faculdad de Ciencias Quimicas , Universidad Autonoma de Nuevo Leon , Monterrey, Mexico
| | - L.M. Blanco
- c Faculdad de Ciencias Quimicas , Universidad Autonoma de Nuevo Leon , Monterrey, Mexico
| | - A.D. Garnovskii
- a Institute of Physical and Organic Chemistry , Rostov State University , Rostov-on-Don, 344090, Russia
- b South Scientific Center of Russian Academy of Sciences , 344006 Rostov-on-Don, Chekhova st. 4.1, Russia
| | - Yu.A. Zhdanov
- a Institute of Physical and Organic Chemistry , Rostov State University , Rostov-on-Don, 344090, Russia
- b South Scientific Center of Russian Academy of Sciences , 344006 Rostov-on-Don, Chekhova st. 4.1, Russia
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Meyer zu Berstenhorst B, Erker G, Kehr G, Fröhlich R. Carbohydrate–metallocene conjugates: selective formation of a zirconadioxacyclopentane-type dimer from the reaction of a bis(enolate)ZrCp2reagent with a glucofuranoside derivative. Dalton Trans 2006:3200-3. [PMID: 16802037 DOI: 10.1039/b603803d] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The zirconocene enolate complex bis(2-propenolato)ZrCp2 (1) reacts with two molar equivalents of the 1,2,3,4-O-tetramethyl-alpha-D-glucopyranoside (2) with liberation of two equivalents of acetone to yield cleanly the bis(carbohydrate)zirconcene complex (3). Alternatively 1 and the "bifunctional" glucose derivative 3-O-benzyl-1,2-O-isopropylidene-glucofuranoside (4) react to the corresponding zirconadioxacyclopentane-type metallacyclic product that was isolated as the respective dimer (5) featuring a sequence of linearly anellated five-, four-, five-membered metallacycles. Both carbohydrate zirconocene complexes 3 and 5 were characterized by NMR experiments as well as by X-ray diffraction.
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Abstract
Using ligands derived from D-glucose, dinuclear organotitanium compounds with interesting structural features were synthesized.
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Affiliation(s)
- Daniela Küntzer
- Universität Hamburg, Fachbereich Chemie, Martin-Luther-King-Platz 6, 20146, Hamburg, Germany
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Vedø P, Chauvin R, Li Z, Bernet B, Vasella A. Synthesis of Enantiomerically Pure Ferrocenes from Glycofuranosyl-cyclopentadienes, synthetic equivalents of (alkoxyalkyl)fulvenes. Helv Chim Acta 2004. [DOI: 10.1002/hlca.19940770620] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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Gottschaldt M, Wegner R, Görls H, Klüfers P, Jäger EG, Klemm D. Binuclear copper(II) complexes of 5-N-(β-ketoen)amino-5-deoxy-1,2-O-isopropylidene-α-d-glucofuranoses: synthesis, structure, and catecholoxidase activity. Carbohydr Res 2004; 339:1941-52. [PMID: 15261587 DOI: 10.1016/j.carres.2004.05.018] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/20/2004] [Revised: 05/10/2004] [Accepted: 05/17/2004] [Indexed: 10/26/2022]
Abstract
The synthesis of 5-amino-5-deoxy-1,2-O-isopropylidene-alpha-D-glucofuranose (8) was carried out via 5-azido-5-deoxy-1,2:3,4-O-diisopropylidene-alpha-D-glucofuranose (6), its reduction with Raney-Nickel and deprotection. 5-N-(beta-Ketoen)amino-5-deoxy-1,2-O-isopropylidene-alpha-D-glucofuranoses (8a-f) were synthesized from 5-amino-5-deoxy-1,2-O-isopropylidene-alpha-D-glucofuranose and beta-ketoenolethers leading to ligands with symmetrically substituted double bonds (8a, 8b) and e/z isomeric mixtures with unsymmetrical substitution (8c-f). Reaction of the ligands with Cu(II) ions leads to binuclear complexes of the general formula Cu2L2. In contrast to copper(II) complexes which are not derived from amino carbohydrates the metal centers in the compounds saturate their coordination sphere by complexation of additional solvent molecules, interaction with neighboring complex molecules, or free hydroxyl groups of the own ligand. Residues of the ketoen moiety, R1 and R2, also influence the electronic properties of the metal centers. The combination of factors leads to different catalytic properties of the complexes in catecholoxidase-like reactions.
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Affiliation(s)
- Michael Gottschaldt
- Friedrich Schiller University Jena, Institute of Organic and Macromolecular Chemistry, Humboldtstrasse 10, 07743 Jena, Germany.
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Jessen L, Haupt ET, Heck J. Organometallic supramolecular chemistry with monosaccharides: triethylammonium mu-chloro-bis[chloro(eta5-cyclopentadienyl)-(methyl 4,6-o-benzylidene-beta-D-glucopyranosidato-1kappaO2,1:2kappaO3) zirconate]. Chemistry 2001; 7:3791-7. [PMID: 11575781 DOI: 10.1002/1521-3765(20010903)7:17<3791::aid-chem3791>3.0.co;2-b] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Abstract
The reaction of [CpZrCl3(thf)2] with methyl 4,6-O-benzylidene-beta-D-glucopyranoside (beta-MeBGH2, 1) in the presence of Et3N results in the formation of the zirconate complex [Et3NH] [(CpZrCl)2(mu-Cl) (mu-(beta-MeBG)]2] (2). X-ray structure analyses were performed from the ligand precursor beta-MeBGH2 1 as well as from 2. Compound 1 crystallizes in the monoclinic chiral space group P2(1). The molecules show a flat arrangement including the benzylidene protecting group, and are packed in columns. The columns are held together in pairs by the formation of hydrogen bonds between the hydroxy functions in positions 2 and 3. Compound 2 crystallizes in the orthorhombic space group P2(1)2(1)2(1). The beta-MeBG ligands are chelating the Zr atoms through the oxygen atoms in positions 2 and 3 of the glucopyranosidato ligand revealing a 1-zircona-2,5-dioxolane moiety each; the oxygen atom in position 3 is linked to both of the Zr atoms. Additionally one chloro ligand is bridging the two Zr centers. Two terminally bound chloro ligands stick out from the two Zr atoms into a chiral U-shaped cavity constructed by the two beta-MeBG ligands. The cavity incorporates the tertiary ammonium cation [Et3NH]+ which is bound to one of the terminal chloro ligands through a hydrogen bond. The inclusion of the [Et3NH]+ cation in the U-shaped cavity, even in solution, is demonstrated by NMR spectroscopic data.
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Affiliation(s)
- L Jessen
- Institut für Anorganische und Angewandte Chemie, Hamburg, Germany
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Tietze LF, Weigand B, Völkel L, Wulff C, Bittner C. Synthesis of enantiopure homoallylic ethers by reagent controlled facial selective allylation of chiral ketones. Chemistry 2001; 7:161-8. [PMID: 11205007 DOI: 10.1002/1521-3765(20010105)7:1<161::aid-chem161>3.0.co;2-9] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Abstract
The stereoselective allylation of chiral methyl ketones to give tertiary homoallylic ethers, which can easily be transformed into homoallylic alcohols, is described. Reaction of the enantiopure ketones 8a-d and the racemic ketones 26a-d with the norpseudoephedrine derivative 2 or ent-2 and allylsilane in the presence of a catalytic amount of trifluoromethanesulfonic acid, led to a series of homoallylic ethers with good to excellent diastereoselectivity (85:15 to > 97:3). The allylation is reagent controlled and nearly independent from the stereogenic centers in the substrates. A partial kinetic resolution was observed using the racemic ketones 26a-d. In the reaction of the chiral ketones 8a-d with the achiral reagents ethoxytrimethylsilane and allylsilane only a low diastereoselectivity was observed.
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Affiliation(s)
- L F Tietze
- Institut für Organische Chemie, Georg-August-Universität Göttingen, Germany.
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Yanagisawa A, Kageyama H, Nakatsuka Y, Asakawa K, Matsumoto Y, Yamamoto H. Enantioselektive Addition von Allyltrimethoxysilanen an Aldehyde mitp-Tol-BINAP⋅AgF als Katalysator. Angew Chem Int Ed Engl 1999. [DOI: 10.1002/(sici)1521-3757(19991216)111:24<3916::aid-ange3916>3.0.co;2-v] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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Hoveyda AH, Morken JP. Chirale ebthi-Titan- und -Zirconiumkomplexe als Reagentien und Katalysatoren für die enantioselektive C-C- und C-H-Verknüpfung. Angew Chem Int Ed Engl 1996. [DOI: 10.1002/ange.19961081205] [Citation(s) in RCA: 60] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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Hudlicky T, Entwistle DA, Pitzer KK, Thorpe AJ. Modern Methods of Monosaccharide Synthesis from Non-Carbohydrate Sources. Chem Rev 1996; 96:1195-1220. [PMID: 11848785 DOI: 10.1021/cr9403300] [Citation(s) in RCA: 200] [Impact Index Per Article: 7.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Tomas Hudlicky
- Department of Chemistry, University of Florida, Gainesville, Florida 32611
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Gerlach U, Haubenreich T, Hünig S. Einfluß der Reaktionsbedingungen auf die enantioselektive Protonierung von Lacton-Enolaten. ACTA ACUST UNITED AC 1994. [DOI: 10.1002/cber.19941271022] [Citation(s) in RCA: 22] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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Duthaler RO, Hafner A, Alsters PL, Bold G, Rihsd G, Rothe-Streita P, Wyssa B. The preparation of chiral titanium reagents: a comparison of new and known ligands. Inorganica Chim Acta 1994. [DOI: 10.1016/0020-1693(94)03899-6] [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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30
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Fuhrhop JH, Bedurke T, Hahn A, Grund S, Gatzmann J, Riederer M. Der Effekt chiraler Doppelschichten: Wachsröhrchen aus (S)-Nonacosan-10-ol. Angew Chem Int Ed Engl 1994. [DOI: 10.1002/ange.19941060324] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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31
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Kunz H, Rück K. Kohlenhydrate als chirale Auxiliare in der stereoselektiven Synthese. Angew Chem Int Ed Engl 1993. [DOI: 10.1002/ange.19931050305] [Citation(s) in RCA: 38] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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Dietz SD, Eilerts NW, Heppert JA. Präzedenzloser stereospezifischer Ligandenaustausch an einem WW-Templat. Angew Chem Int Ed Engl 1992. [DOI: 10.1002/ange.19921040117] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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34
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Duthaler RO, Herold P, Wyler-Helfer S, Riediker M. Enantio- and Diastereoselective Aldol-Reaction of 2,6-Dimethylphenyl Propionate Using Titanium-Carbohydrate Complexes. Helv Chim Acta 1990. [DOI: 10.1002/hlca.19900730315] [Citation(s) in RCA: 59] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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36
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Bold G, Steiner H, Moesch L, Walliser B. Herstellung von ?Semialdehyd?-Derivaten von Asparagins�ure- und Glutamins�ure durchRosenmund-Reduktion. Helv Chim Acta 1990. [DOI: 10.1002/hlca.19900730219] [Citation(s) in RCA: 29] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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37
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Oertle K, Beyeler H, Duthaler RO, Lottenbach W, Riediker M, Steiner E. A Facile Synthesis of Optically Pure (?)-(S)-Ipsenol Using a Chiral Titanium Complex. Helv Chim Acta 1990. [DOI: 10.1002/hlca.19900730215] [Citation(s) in RCA: 46] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
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38
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Riediker M, Hafner A, Piantini U, Rihs G, Togni A. Struktur von Chloro(cyclopentadienyl)bis-(1,2:5,6-di-O-isopropyliden-α-D-glucofuranos-3-O-yl)titanat, einem neuartigen Titan-Kohlenhydrat-Komplex. Angew Chem Int Ed Engl 1989. [DOI: 10.1002/ange.19891010428] [Citation(s) in RCA: 18] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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39
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Bold G, Duthaler RO, Riediker M. Enantioselektive Synthese vonD-threo-β-Hydroxy-α-aminosäuren mit Titan-Kohlenhydrat-Komplexen. Angew Chem Int Ed Engl 1989. [DOI: 10.1002/ange.19891010427] [Citation(s) in RCA: 34] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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40
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Duthaler RO, Herold P, Lottenbach W, Oertle K, Riediker M. Enantioselektive Aldol-Reaktion vontert-Butylacetat mit Hilfe von Titan-Kohlenhydrat-Komplexen. Angew Chem Int Ed Engl 1989. [DOI: 10.1002/ange.19891010426] [Citation(s) in RCA: 56] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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41
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Riediker M, Hafner A, Piantini U, Rihs G, Togni A. Structure of Chloro(cyclopentadienyl)bis(1,2:5,6-di-O-isopropylidene-?-D-glucofuranos-3-O-yl) Titanate, a Novel Titanium-Carbohydrate Complex. ACTA ACUST UNITED AC 1989. [DOI: 10.1002/anie.198904991] [Citation(s) in RCA: 23] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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42
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Duthaler RO, Herold P, Lottenbach W, Oertle K, Riediker M. Enantioselective Aldol Reaction oftert-Butyl Acetate using Titanium-Carbohydrate Complexes. ACTA ACUST UNITED AC 1989. [DOI: 10.1002/anie.198904951] [Citation(s) in RCA: 101] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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43
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Bold G, Duthaler RO, Riediker M. Enantioselective Synthesis ofD-threo-?-Hydroxy-?-amino Acids with Titanium-Carbohydrate Complexes. ACTA ACUST UNITED AC 1989. [DOI: 10.1002/anie.198904971] [Citation(s) in RCA: 71] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
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