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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 solventfree asymmetric organocatalytic aldol reaction under ballmilling conditions using Lproline (I) as catalyst (Scheme 1) [29–30].
Hernández, Juaristi ballmill procedure in the ''green'' asymmetric aldol reaction organocatalyzed by (S)prolinecontaining dipeptides in the presence of .
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Read "Solvent‐Free Asymmetric Organocatalysis in a Ball Mill" on DeepDyve Instant access to the journals you need! » More; Efficient ballmill procedure in the ''green'' . Efficient ballmill procedure in the ''green'' asymmetric aldol reaction organocatalyzed by ( S )prolinecontaining dipeptides in the presence of water » More
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reaction times and result in simple and efficient workup procedures.[9] For these reasons, organocatalyzed aldol reactions under solventfree conditions or employing water as solvent have become a highly pursued goal in green chemistry. Following our studies in the use of prolineamidederived organocatalysts as efficient
Jan 20, 2011· Efficient ballmill procedure in the ''green'' asymmetric aldol reaction organocatalyzed by (S)prolinecontaining dipeptides in the presence of water. Tetredron 2011, 67, . DOI: / Jose G. Hernandez, Eusebio Juaristi.
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Sep 09, 2011· Read "Efficient ballmill procedure in the ''green'' asymmetric aldol reaction organocatalyzed by ( S )prolinecontaining dipeptides in the presence of water, Tetredron" on DeepDyve, the largest online rental service for scholarly research with thousands of academic publications available at your fingertips.
The organocatalytic activity of (S)prolinebased dipeptides 1a–c has been evaluated in the asymmetric aldol reaction between representative ketones with various aromatic aldehydes under solventfree conditions in a ball 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 ...
José G. Hernández and Eusebio Juaristi, Efficient ballmill procedure in the ''green'' asymmetric aldol reaction organocatalyzed by (S)prolinecontaining dipeptides in the presence of water, Tetredron, 67, 36, (6953), (2011).
Download Citation on ResearchGate | A Highly Efficient Asymmetric Organocatalytic Aldol Reaction in a Ball Mill | Antialdol products with up to >99 % enantiomeric excess (ee) have been obtained ...
Efficient ballmill procedure in the ''green'' asymmetric aldol reaction organocatalyzed by ( S)prolinecontaining dipeptides in the presence of water more .
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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 solventfree conditions in a ball mill has been evaluated. α,αDipeptide (S,S)2 catalyzed the stereoselective formation of the expected aldol products, with higher diastereo and ...
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 nonclassical) 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
Dec 02, 2014· Among such catalysts, lproline is the only known natural organocatalyst; it has been shown to catalyze asymmetric aldol reactions (33 ... (2011) Efficient ballmill procedure in the ''green'' asymmetric aldol reaction organocatalyzed by .
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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 .
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Efficient ballmill procedure in the ''green'' asymmetric aldol reaction... The organocatalytic activity of (S)prolinebased dipeptides 1a–c has been evaluated in the asymmetric aldol reaction between representative ketones with vari.
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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 .
Efficient ballmill procedure in the ''green'' asymmetric aldol reaction organocatalyzed by (S)prolinecontaining dipeptides in the presence of water Tetredron, 2011 Eusebio Juaristi
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