Palladium-Catalyzed Stereoselective Cyclization of Supporting information for this article is available on the WWW under http://www.wiley‐vch.de/contents/jc_2002/2001/z15926_s.pdf or from the author. Zeitschrift für anorganische und allgemeine Chemie. 2.10 The Aldol Reaction: Transition Metal Enolate. (1)]. Industrial & Engineering Chemistry Research. 3 Please check your email for instructions on resetting your password. An effect of the ionic radii of lanthanide(III) ions on the structure and catalytic properties of chiral Schiff base-lanthanide(III) complexes. Formed Allenyl Hemiacetals: Synthesis of Rosuvastatin and Pitavastatin Convergent and flexible approach to stereodefined polyhydroxylated fragments. The full text of this article hosted at iucr.org is unavailable due to technical difficulties. Fieser and Fieser's Reagents for Organic Synthesis. Samarium‐Catalyzed Tandem Semipinacol Rearrangement/Tishchenko Reaction of α‐Hydroxy Epoxides: A Novel Approach to Highly Stereoselective Construction of 2‐Quaternary 1,3‐Diol Units. Borrowing Hydrogen in the Activation of Alcohols. Lanthanide alkoxide complexes stabilized by a novel salen-type Schiff-base ligand: Synthesis, structure, and catalysis for the polymerization of lactide. in Situ stereogenic center Microwave-Assisted Synthesis of the Tetradentate Schiff-Bases Under Solvent-Free and Catalyst-Free Condition. Cationic rare-earth metal SALEN complexes. Support from Amoco Chemicals is also appreciated. Zeitschrift f�r anorganische und allgemeine Chemie. Dynamic Structural Change of the Self‐Assembled Lanthanum Complex Induced by Lithium Triflate for Direct Catalytic Asymmetric Aldol–Tishchenko Reaction. 4) A modification of the Tishchenko reaction is the aldol-Tishchenko reaction where the aldehyde first undergoes an aldol reaction followed by the Tishchenko reaction to rac Enantioselective Direct Aldol-Tishchenko Reaction:  Access to Chiral Stereopentads. Unmodified carbonyl compounds are converted in an enantioselective aldol‐Tishchenko reaction directly into the chiral adduct by using catalytic amounts of a chiral base prepared in situ [Eq. The authors thank Prof. Joseph Templeton for helpful discussions and Andrew Larsen of the Gagné research group for assistance with vapor pressure osmometry experiments. The Tishchenko reaction refers to the dimerization of an aldehyde in the presence of a metal catalyst to form an ester. Catalytic Transformation of Aldehydes with Nickel Complexes through η Coupling an irreversible Tishchenko reaction to a reversible aldol reaction overcame the retro-aldol reaction problem and thereby afforded the products in high enantio and diastereoselectivity using 10 mol % of the asymmetric catalyst. Use the link below to share a full-text version of this article with your friends and colleagues. Samarium dienolate mediated stereoselective synthesis of anti-1,3-diol monoesters via aldol-Tishchenko reaction. Enantioselective Desymmetrization of meso‐Aziridines with TMSN3 or TMSCN Catalyzed by Discrete Yttrium Complexes. (1)]. Ad=adamantyl. The reaction is catalyzed by aluminium alkoxides. New Cyclotrimerization of Aldehydes to Cyclopentenone or Tetrahydrofuran Induced by Dibromotriphenylphosphorane. Stereoselective Synthesis of 2-Fluoro-1,3-Diols via Lithium Binaphtholate-Catalyzed Aldol–Tishchenko Reaction. 62 The reaction occurs by a mechanism involving reversible aldolization and formation of hemiacetal alkoxide 96, followed by a rate … Enantioselective Cyanosilylation of Ketones by a Catalytic Double‐Activation Method with an Aluminium Complex and an N‐Oxide. If you do not receive an email within 10 minutes, your email address may not be registered, Ir(I)-Catalyzed Enantioselective Decarboxylative Allylic Etherification: A General Method for the Asymmetric Synthesis of Aryl Allyl Ethers. 10.1002/1521-3757(20011015)113:20<3995::AID-ANGE3995>3.0.CO;2-D. 10.1002/1521-3773(20011015)40:20<3877::AID-ANIE3877>3.0.CO;2-S, https://doi.org/10.1002/1521-3773(20010202)40:3<601::AID-ANIE601>3.0.CO;2-W, http://www.wiley‐vch.de/contents/jc_2002/2001/z15926_s.pdf. Catalytic enantioselective aldol reactions. Any queries (other than missing content) should be directed to the corresponding author for the article. • The Tishchenko reaction of acetaldehyde gives the commercially important solvent ethyl acetate. Bimetallic catalysis in the highly enantioselective ring–opening reactions of aziridines. Synthesis and structural characterization of scandium SALEN complexes. Journal of Synthetic Organic Chemistry, Japan. Learn more. . Catalytic Asymmetric Synthesis of α-Alkylidene-β-hydroxy Esters via Dynamic Kinetic Asymmetric Transformation Involving Ba-Catalyzed Direct Aldol Reaction. Catalytic Enantioselective Aldol Addition Reactions. J.P.M. The Zirconium Alkoxide‐Catalyzed Aldol‐Tishchenko Reaction of Ketone Aldols. The Tishchenko Reaction is a disproportionation reaction that allows the preparation of esters from two equivalents of an aldehyde. Samarium‐Promoted Asymmetric Aldol–Tishchenko Reaction: Synthesis of Amino Acid‐Derived 4‐Amino‐1,3‐diols. Working off-campus? Metal–Salen Schiff base complexes in catalysis: practical aspects. . Mechanism of the Tishchenko Reaction The aluminium alkoxide acts as a Lewis acid to coordinate with one molecule of the aldehyde, and to facilitate the addition of a second equivalent of aldehyde, generating a hemiacetal intermediate: Mixed Imidazolin-2-iminato–Cp* Thorium(IV) Complexes: Synthesis and Reactivity Toward Oxygen-Containing Substrates. A Novel Utilization of Acylsilanes in Organic Synthesis. Synthesis, structure and reactivity of samarium complexes supported by Schiff-base ligands.

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