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Showing 1 to 20 of 145 for “"aldol"”.

  1. A general aldol approach to polypropionate synthesis

    Channon, J. A.University of Cambridge1992

    cambridge Repository record

  2. Asymmetric aldol reactions and phenylthio migrations in synthesis

    Chibale, KellyUniversity of Cambridge1992

    cambridge Repository record

  3. Marcus Theory Applied To Acetal Cleavage And Aldol Reactions

    Barker, Jonathan Arthur1995

    … been determined for four hydroxide catalyzed aldol condensations at 25.0{dollar}spcirc{dollar}C in aqueous solution. The four reactions studied were acetone, acting as carbon acid, with {dollar}alpha,alpha,alpha{dollar}-trifluoroacetophenone and with p-nitroacetophenone, and …

    uwo Repository record

  4. Lewis Base-Catalyzed Enantioselective Allylation and Aldol Addition Reactions

    Su, XipingUniversity of Illinois at Urbana-Champaign2015

    Embargo set by: Seth Robbins for item 85720 Lift date: Forever Reason: Restricted to the U of I community idenfinitely during batch ingest of legacy ETDs

    uiuc Repository record

  5. Investigations on transition state geometry of aldol addition reactions

    Lee, WheeseongUniversity of Illinois at Urbana-Champaign2011

    U of I Only

    uiuc Repository record

  6. An aldol-based approach to the synthesis of oleandomycin

    Norcross, R. D.University of Cambridge1992

    cambridge Repository record

  7. The tandem chain extension -aldol reaction of beta-keto esters

    Aiken, Karelle S

    <p>The Tandem Chain Extension-Aldol (TCEA) Reaction of beta-keto esters with aliphatic and aromatic aldehydes yields gamma-keto-beta'-hydroxy esters with significant syn-selectivity. A control Reformatsky reaction with a methyl 2-iodo-5,5-dimethyl-4-oxo-hexanoate 53 and methyl …

    unh-thes Repository record

  8. Lewis Base Catalyzed Enantioselective Aldol Additions: Preparative and Mechanistic Studies

    Pham, Son MinhUniversity of Illinois at Urbana-Champaign2015

    … of Arrhenius activation parameters revealed that aldol addition occurs through the reversible albeit unfavorable formation of an activated complex. Finally, natural abundance 13C NMR kinetic isotope effect (KIE) studies have determined aldolization to be rate limiting.

    uiuc Repository record

  9. New chiral catalyts for the asymmetric Mukaiyama-type aldol reaction

    Tempkin, Orin, 1967-Massachusetts Institute of Technology1994

    Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Chemistry, 1994.

    mit Repository record

  10. ALDOL COUPLINGS OF CHIRAL FRAGMENTS WITH KINETIC RESOLUTION: SCOPE AND LIMITATIONS

    kazemeini, aliehUniversity of Saskatchewan2013

    … a synthetic strategy that involves the stepwise aldol reactions of 6 and 7a to rapidly access stereochemically complex tetrapropionate 8 and hexapropionate synthons 72 or 73. Coupling racemic 7a with any of the four enantioenriched diastereomers 8 with kinetic resolution (KR) is possible with …

    sask Repository record

  11. Chemoenzymatic aldol reactions : applications of a four-enzyme-catalytic cascade reaction

    Hemert, J.C. van[S.l.] : [S.n.]2012

    Contains fulltext : 100599.pdf (Publisher’s version ) (Open Access)

    radboud Repository record

  12. The study of aldol condensation of ketones using zoelites as catalysts

    Motsoetsoe, PhalaliDepartment of Chemical Engineering2001

    … H-Beta and H-USY were evaluated as catalysts for aldol condensation reactions of acetone and cyclohexanone and the results compared with those using H₂SO₄. Cross-aldol condensation reactions of acetone and benzaldehyde were also performed.

    cape-town Repository record

  13. DFT Studies of the Organocatalytic Aldol Reaction and a Frustrated Lewis Pair

    Movahedi, ShahabBrock University2016

    … study of the organocatalytic α-chlorination-aldol reaction and the chiral backbone Frustrated Lewis Pair (FLP) system served as a valuable tool for experimental purposes. This thesis describes methods to consider different transition states of the proline- catalyzed α-chlorination aldol …

    brock Repository record

  14. Structural investigation of a computationally designed and in vitro optimized retro-aldol enzyme

    Caner, SamiETH Zurich2011

    ethz Repository record

  15. Studies on the Phospho-Aldol Reaction Catalysed by Aluminium Salcyan and Related Complexes

    Cosgrove, Nichola ElizabethUniversity of Leeds2011

    The phospho-aldol (PA) reaction is one of the most versatile reactions for the formation of phosphorus-carbon [P-C] bonds. The reaction is a base-catalysed addition reaction between a hydrogen-phosphonate ester and a carbonyl substrate, affording alpha-functionalised phosphonate esters. These PA …

    whiterose Repository record

  16. Thiopyran route to polypropionates : simultaneous-two directional and enantiotopic group selective aldol reactions

    Akinnusi, Olukayode TUniversity of Saskatchewan2006

    The sequential aldol reactions of thiopyran derivatives 112 and 119 to rapidly generate hexapropionate building blocks in two carbon-carbon forming steps has been well studied within the Ward group. An extension of this strategy to generate non-racemic tetra- and hexapropionate fragments involved …

    sask Repository record

  17. Lewis Base Activation of Lewis Acids in Asymmetric Aldol Reactions of Silyl Ketene Acetals

    Beutner, Gregory LouisUniversity of Illinois at Urbana-Champaign2015

    … chiral phosphoramide catalyzed/SiCl 4 promoted aldol reaction of silyl ketene acetals and silyl dienol ethers with aldehydes. The weakly acidic species, silicon tetrachloride (SiCl 4), is activated by binding of a strongly Lewis basic chiral phosphoramide, leading to in situ formation of a …

    uiuc Repository record

  18. Aldol reactions of lactate-derived ketones : application to the total synthesis of (-)-ACRL toxin IIIB

    Wallace, D. J.University of Cambridge1995

    cambridge Repository record

  19. Lewis Base Catalyzed Aldol Additions of Chiral Silyl Enol Ethers and Total Synthesis of Rk-397

    Fujimori, ShinjiUniversity of Illinois at Urbana-Champaign2015

    … in chiral Lewis base catalyzed aldol additions was examined using chiral silyl enol ethers derived from hydroxyisobutyrate and hydroxybutyrate. Trichlorosilyl enolates derived from the chiral methyl and ethyl ketones were subjected to the Lewis base catalyzed conditions, and the …

    uiuc Repository record

  20. Studies in Asymmetric Catalysis: Lewis Base catalyzed/Lewis Acid Mediated Aldol Reactions of Ketone- and Amide Derived Nucleophiles

    Heemstra, John Richard, JrUniversity of Illinois at Urbana-Champaign2015

    … catalyst for highly selective vinylogous aldol reactions between dienolates derived from a variety of alpha,beta-unsaturated carbonyl compounds to aldehydes. These reactions provided high levels of gamma-site selectivity for a variety of substitution patterns on the dienyl unit. Both …

    uiuc Repository record

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