Request PDF on ResearchGate ChemInform Abstract: Efficient BallMill Procedure in the ′Green′ Asymmetric Aldol Reaction Organoalyzed by (S)ProlineContaining Dipeptides in the Presence
Efficient ballmill procedure in the 'green' asymmetric aldol reaction organoalyzed by ( S)prolinecontaining dipeptides in the presence of water . Bookmark. Download. by Eusebio Juaristi 12 . Organic Chemistry, Water, Green Chemistry, Catalysis Efficient ballmill procedure in the 'green' asymmetric aldol reaction
An efficient, solventfree ballmilling protocol for the asymmetric aldol reaction between cyclohexanone and cyclopentanone with various aromatic aldehydes using a novel series of (S)prolinecontaining dipeptides and thiodipeptides 1a–f as organoalysts is reported.In general, (S)prolinecontaining thiodipeptides proved to be better organoalysts relative to their analogous amides.
2016820&ensp·&enspefficient organoalyst studied promoting the direct aldol reaction of cycloalkyl, alkyl, and αfunctionalized ketones with aromatic aldehydes in the presence of water and under solventfree reaction conditions employing only 2 equiv. of nucleophile. Generally, antialdol products are
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Hernández JG, Juaristi E. Efficient ballmill procedure in the 'green' asymmetric aldol reaction organoalyzed by (S)prolinecontaining dipeptides in the presence of
Among different organoalysts used for asymmetric aldol reactions, proline and its derivatives emerged as powerful alysts for the enamine activation of donor aldehyde or ketone. Bolm's group reported a solventfree asymmetric organoalytic aldol reaction under ballmilling conditions using L
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The organoalytic 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 alyzed the stereoselective formation of the expected aldol products, with higher diastereo and
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2014122&ensp·&enspOrganoalysts are lowmolecular mass organic compounds composed of nonmetallic elements. Here, we report that actinorhodin (ACT), a bacterialderived antimicrobial compound, acts as an organoalyst, as indied by the following findings: ( i ) substrate oxidation reactions that produced H2O2 proceeded in the presence of ACT ( ii ) ACT was not consumed during the reactions and ( iii )
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2019420&ensp·&enspDegree 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
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(2011) Efficient ballmill procedure in the 'green' asymmetric aldol reaction organoalyzed by (S)prolinecontaining dipeptides in the presence of water. Tetrahedron 67 (36): 6953 – 6959 CrossRef Web of Science Google Scholar. Contact Supplier
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