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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 .
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
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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.
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
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 .
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).
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.
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).
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 ...
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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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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
Among different organocatalysts used for asymmetric aldol reactions, proline and its derivatives emerged as powerful catalysts for the enamine activation of donor aldehyde or ketone. Bolm's group reported a solvent-free asymmetric organocatalytic aldol reaction under ball-milling conditions using L-proline (I) as catalyst (Scheme 1) [29–30].
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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 ...
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
Efficient ball-mill procedure in the 'green' asymmetric aldol reaction organocatalyzed by ( S)-proline-containing dipeptides in the presence of water more .
Dec 02, 2014· Among such catalysts, l-proline is the only known natural organocatalyst; it has been shown to catalyze asymmetric aldol reactions (33 ... (2011) Efficient ball-mill procedure in the 'green' asymmetric aldol reaction organocatalyzed by .
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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 ...
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