efficient ball mill procedure in the green asymmetric aldol reaction

Stereoselective Synthesis | Prof. Dr. Carsten Bolm

A Highly Efficient Asymmetric Organocatalytic Aldol Reaction in a Ball Mill B. Rodríguez, A. Bruckmann, C. Bolm, Chem. Eur. J. 2007, 13, 47104722. Synthesis of Novel Chiral Phosphine-Olefin Complexes and their Evaluation as Ligands in the Rhodium-Catalyzed Asymmetric 1,4-Addition

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Synthesis of Nanomaterials by High Energy Ball Milling It is a ball milling process where a powder mixture placed in the ball mill is subjected to high-energy collision from the balls. the milling efficiency of the planetary ball was found to be heavily influenced by the ratio of the angular velocity of the planetary wheel to that of

Aldol reaction Publications | PubFacts

The first enantioselective total synthesis of the proposed structure of NFAT-133 [(10,11,12)-] and its C10 epimer [(10,11,12)-] was achieved from a known aromatic ester by a 10-step sequence that featured chiral auxiliary-directed asymmetric alkylation and the Evans asymmetric aldol reaction

José G. Hernández Research Assistant RWTH Aachen

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An efficient, solvent-free ball-milling protocol for the asymmetric aldol reaction between cyclohexanone and cyclopentanone with various aromatic aldehydes using a novel series of (S)-proline

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Apr 22, 2016 . The influence of the operating frequency, the milling ball and grinding . If not stated otherwise, quartz sand was used as grinding stock in the basic experiments to avoid efficient asymmetric organocatalytic aldol reaction in a ball mill. . facile solvent free mechanosynthesis in a cell lysis mill: preparation. Live Chat

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Mechanochemistry assisted asymmetric organocatalysis: A

Scheme 4: Asymmetric aldol reaction assisted by ball-milling catalysed by dipeptides (A) with III and (B) with IV. The methyl ester of (S)-proline-(S)-tryptophan (IV) was shown to be an efficient organocatalyst for asymmetric aldol reactions of ketones with aromatic aldehydes in the presence of water by using HSBM (Scheme4) [37].

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Reacciones asimétricas organocatalizadas en ausencia de

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Hernández J.G., Juaristi E.Efficient ball-mill procedure in the 'green' asymmetric aldol reaction organocatalyzed by (S)-proline-containing dipeptides in the presence of

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A highly efficient asymmetric organoalytic aldol reaction in a ball Rodríguez B(1) Efficient mixing of all the components is accomplished by applying a mechanochemical technique (ball milling). The alysis is air and moisture tolerant and can be performed with nonpurified starting materials.

Clean and Efficient One-Pot Synthesis of New 2-Oxo-2,3

Rodriguez B, Bruckmann A, Bolm C.A Highly Efficient Asymmetric OrganocatalyticAldol Reaction in a Ball Mill.ChemEurJ2007; 13: 4710-4722. Hernandez J G, Juaristi E. Efficient ball-mill procedure in the 'green' asymmetric aldol reaction organocatalyzed by ( S ) -proline-containing dipeptides in

:Research and Reviews: Journal of Chemistry · 2015:Mohamed Ould M Hamed: Imam Muhammad Ibn Saud Islamic University:Omics · Ball mill · One-pot synthesis

Efficient ball mill procedure in the green asymmetric

Efficient ball-mill procedure in the 'green' asymmetric aldol reaction The organocatalytic activity of (S)-proline-based dipeptides 1ac has been evaluated in the asymmetric aldol reaction between representative ketones with vari.

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Temperature progression in a mixer ball mill . SpringerLink. Apr 22, 2016 . The influence of the operating frequency, the milling ball and grinding . McKissic KS, Caruso JT, Blair RG, Mack J (2014) Comparison of shaking . A highly efficient asymmetric organocatalytic aldol reaction in a ball mill. Live Chat

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A Highly Efficient Asymmetric Organocatalytic Aldol Reaction . catalyzed by chiral copper complexes in a ball mill, . peptide and amide bond formation . Obtenir le prix et le support Simulating the Bond rod mill

José G. Hernández Research Assistant RWTH Aachen

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An efficient, solvent-free ball-milling protocol for the asymmetric aldol reaction between cyclohexanone and cyclopentanone with various aromatic aldehydes using a novel series of (S)-proline

Water versus Solvent-free Conditions for the

reaction times and result in simple and efficient workup procedures.[9] For these reasons, organocatalyzed aldol reactions under solvent-free conditions or employing water as solvent have become a highly pursued goal in green chemistry. Following our studies in the use of prolineamide-derived organocatalysts as efficient

Asymmetric Catalysis Home ICM

[23] Hernández J.G., Juaristi E., Efficient ball-mill procedure inthe 'green' asymmetric aldol reaction organocatalyzed by(S)-proline-containing dipeptides in the presence of

Efficient ball-mill procedure in the 'green' asymmetric

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Efficient ball-mill procedure in the 'green' asymmetric aldol reaction organocatalyzed by (S)-proline-containing dipeptides in the presence of water Author links open overlay panel José G

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Dec 02, 2014· Hernández JG, Juaristi E. Efficient ball-mill procedure in the 'green' asymmetric aldol reaction organocatalyzed by (S)-proline-containing dipeptides in the presence of water. Tetrahedron. 2011; 67 (36):69536959.

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Water versus Solvent-free Conditions for the

efficient organocatalyst studied promoting the direct aldol reaction of cycloalkyl, alkyl, and functionalized ketones with aromatic aldehydes in the presence of water and under solvent-free reaction conditions employing only 2 equiv. of nucleophile.

Natural low-molecular mass organic compounds with oxidase

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Dec 02, 2014· Hernández JG, Juaristi E. Efficient ball-mill procedure in the 'green' asymmetric aldol reaction organocatalyzed by (S)-proline-containing dipeptides in the presence of water. Tetrahedron. 2011; 67 (36):69536959.

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