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Organocatalytic Aldol Reaction (organocatalytic + aldol_reaction)

Distribution by Scientific Domains
Chemistry100%

Selected Abstracts

A Highly Efficient Asymmetric Organocatalytic Aldol Reaction in a Ball Mill.

CHEMINFORM, Issue 39 2007
Belen Rodriguez
Abstract ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract, please click on HTML or PDF. [source]

Enantioselective Organocatalytic Aldol Reaction of Ynones and Its Synthetic Applications.

CHEMINFORM, Issue 11 2007
Franck Silva
Abstract ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract, please click on HTML or PDF. [source]

A Highly Efficient Asymmetric Organocatalytic Aldol Reaction in a Ball Mill

CHEMISTRY - A EUROPEAN JOURNAL, Issue 17 2007
Belén Rodríguez Dr.
Abstract Anti -aldol products with up to >99,% enantiomeric excess (ee) have been obtained by proline catalysis in excellent yields under experimentally simple solvent-free conditions. Efficient mixing of all the components is accomplished by applying a mechanochemical technique (ball milling). The catalysis is air and moisture tolerant and can be performed with non-purified starting materials. Even mixtures of solely solid compounds react, giving (mostly solid) products through a partially homogeneous (honey-like) intermediate melt. Since the reactant ratio is almost 1:1 (avoiding the common excess of ketone), the product isolation is easy leading to high aldol product yields. [source]

Direct Organocatalytic Aldol Reactions in Buffered Aqueous Media.

CHEMINFORM, Issue 16 2003
Armando Cordova
Abstract For Abstract see ChemInform Abstract in Full Text. [source]

An Asymmetric Tandem Conjugative Addition-Intramolecular Cyclisation Process to Provide Functionalised 3,6-Dihydropyrans and 4,5-Epoxytetrahydropyrans

EUROPEAN JOURNAL OF ORGANIC CHEMISTRY, Issue 1 2010
Silvia Catalán-Muñoz
Abstract The synthesis of 3,6-dihydropyrans and 4,5-epoxytetrahydropyrans starting from enantiomerically pure ,-hydroxy aldehyde (prepared by an organocatalytic aldol reaction) is described. The key step is a tandem sequence, which consists of a base-promoted conjugative addition to a vinyl onium salt, followed by either an intramolecular Wittig process to provide 3,6-dihydropyran derivatives or an intramolecular cyclisation/epoxidation process to afford 4,5-epoxytetrahydropyran scaffolds. The products obtained by this method are common substructures in polyketide natural products. [source]