efficient ball mill procedure in the green asymmetric aldol reaction

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José G. Hernández – Research Assistant – RWTH Aachen ...

Efficient Ball-Mill Procedure in the "Green" Asymmetric Aldol Reaction Organocatalyzed by (S)-Proline-Containing Dipeptides in the Presence of Water Tetrahedron 1. September 2011

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Asymmetric Aldol Reaction Organocatalyzed by (S)-Proline ...

Jan 20, 2011· Efficient ball-mill procedure in the 'green' asymmetric aldol reaction organocatalyzed by (S)-proline-containing dipeptides in the presence of water. Tetrahedron 2011, 67, 6953-6959. DOI: 10.1016/j.tet.2011.06.042. Jose G. Hernandez, Eusebio Juaristi.

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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):6953–6959.

Efficient ball-mill procedure in the 'green' asymmetric ...

Efficient ball-mill procedure in the 'green' asymmetric aldol reaction organocatalyzed by (S)-proline-containing dipeptides in the presence of water Tetrahedron, 2011 Eusebio Juaristi

ChemInform Abstract: Efficient Ball-Mill Procedure in the ...

Request PDF on ResearchGate | ChemInform Abstract: Efficient Ball-Mill Procedure in the ′Green′ Asymmetric Aldol Reaction Organocatalyzed by (S)-Proline-Containing Dipeptides in the Presence ...

Aldol condensation Research Papers - Academia.edu

The organocatalytic activity of the methyl ester of (S)-proline-(S)-phenylalanine, (S,S)-2, in the asymmetric aldol reaction between cyclohexanone and acetone with various aromatic aldehydes under solvent-free conditions in a ball mill has been evaluated. α,α-Dipeptide (S,S)-2 catalyzed the stereoselective formation of the expected aldol products, with higher diastereo- and ...

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Download Citation on ResearchGate | A Highly Efficient Asymmetric Organocatalytic Aldol Reaction in a Ball Mill | Anti-aldol products with up to >99 % enantiomeric excess (ee) have been obtained ...

A Highly Efficient Asymmetric Organocatalytic Aldol ...

May 22, 2007· José G. Hernández and Eusebio Juaristi, Efficient ball-mill procedure in the 'green' asymmetric aldol reaction organocatalyzed by (S)-proline-containing dipeptides in the presence of water, Tetrahedron, 67, 36, (6953), (2011).

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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. Tetrahedron, 67 (2011), pp. …

Efficient ball-mill procedure in the 'green' asymmetric ...

Sep 09, 2011· Read "Efficient ball-mill procedure in the 'green' asymmetric aldol reaction organocatalyzed by ( S )-proline-containing dipeptides in the presence of water, Tetrahedron" on DeepDyve, the largest online rental service for scholarly research with thousands of academic publications available at your fingertips.

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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 …

Efficient ball-mill procedure in the 'green' asymmetric ...

The organocatalytic activity of (S)-proline-based dipeptides 1a–c has been evaluated in the asymmetric aldol reaction between representative ketones with various aromatic aldehydes under solvent-free conditions in a ball mill.In particular, the methyl ester of (S)-proline-(S)-tryptophan, (S,S)-1c, proved to be an efficient organocatalyst, and the aldol reaction proceeded with good chemical ...

Solvent‐Free Synthesis of Peptides - Declerck - 2009 ...

José G. Hernández and Eusebio Juaristi, Efficient ball-mill procedure in the 'green' asymmetric aldol reaction organocatalyzed by (S)-proline-containing dipeptides in the presence of water, Tetrahedron, 67, 36, (6953), (2011).

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Read "Solvent‐Free Asymmetric Organocatalysis in a Ball Mill" on DeepDyve - Instant access to the journals you need! » More; Efficient ball-mill procedure in the 'green' … Efficient ball-mill procedure in the 'green' asymmetric aldol reaction organocatalyzed by ( S )-proline-containing dipeptides in the presence of water » More

Bio-renewable enantioselective aldol reaction in natural ...

Organic chemists solved quickly the problem of pollutants by performing the reaction under solvent-free conditions. 7 A similar reaction performed under ball mill conditions gave the same aldol product 3a in 73% yield and 56% ee. 8 However, in this new protocol, the final work-up using a large amount of diethyl ether (about 80 mL mmol −1) returns us the initial problems associated with the ...

Eusebio Juaristi - Academia.edu

Efficient ball-mill procedure in the 'green' asymmetric aldol reaction organocatalyzed by ( S)-proline-containing dipeptides in the presence of water more …

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 1a–c has been evaluated in the asymmetric aldol reaction between representative ketones with vari.

efficient ball mill procedure in the green asymmetric ...

Efficient ball mill procedure in the green asymmetric . Sep 18, 2012 · Efficient ballmill procedure in the 'green' asymmetric aldol reaction The organoalytic activity of (S)prolinebased dipeptides 1a–c has been evaluated in the asymmetric aldol reaction between …

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Degree of efficiency depending on type of ball mill and reaction scale. High energy efficiency compared to synthesis with other methods of energy entry (classical as well as non-classical) 6% 64% 94% 0% 25% 50% 75% 200 rpm 400 rpm 800 rpm chemical yield ball milling at different rot mortar + Figure 1 pestle Figure 2

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Asymmetric organocatalysis in a ball mill – Beilstein TV

In this video the authors present asymmetric organocatalyses performed in a ball mill. Three reaction types are being discussed: enantioselective aldol reactions, asymmetric Michael additions to nitro alkenes and dipeptide formations. In the laboratory the ball milling device is shown, and reaction …