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The direct asymmetric aldol reaction[1] reaction times and result in simple and efficient workup procedures.[9] For these reasons, efficacy of catalyst 1d was similar when the reaction was performed in a ball mill[9a,9b] (Table 1, entry 10). Recently, remarkable rate acceleration of solventfree organic reactions has been
Efficient ballmill procedure in the green asymmetric aldol reaction organocatalyzed by (S)prolinecontaining dipeptides in the presence of water. Tetredron 2011, 67 (36), . DOI: / Matthias Freund, Svetlana B. Tsogoeva.
Antialdol products with up to gt;99 % enantiomeric excess (ee) have been obtained by proline catalysis in excellent yields under experimentally simple solventfree mixing of all the components is accomplished by applying a mechanochemical technique (ball milling). The catalysis is air and moisture tolerant and can be performed with nonpurified starting materials.
Jos#233; G. Hern#225;ndez, Eusebio Juaristi, Efficient ballmill procedure in the green asymmetric aldol reaction organocatalyzed by (S)prolinecontaining dipeptides in the presence of water, Tetredron, /, 67, 36, (), (2011).
A highly efficient asymmetric organocatalytic aldol reaction in a ball mill. Rodr#237;guez B(1), Bruckmann A, Bolm C. Efficient mixing of all the components is accomplished by applying a mechanochemical technique (ball milling). The catalysis is air and moisture tolerant and can be performed with nonpurified starting materials.
ChemInform Abstract: Efficient BallMill Procedure in the Green Asymmetric Aldol Reaction Organocatalyzed by (S)ProlineContaining Dipeptides in the Presence of Water.
Aug 22, 2005#0183;#32;Jos#233; G. Hern#225;ndez, Eusebio Juaristi, Efficient ballmill procedure in the green asymmetric aldol reaction organocatalyzed by (S)prolinecontaining dipeptides in the presence of water, Tetredron, /, 67, 36, (), (2011).
Request PDF | Direct Asymmetric Aldol Reaction Catalyzed by C2Symmetrical Chiral Primary Amine Organocatalysts | Three novel C2symmetrical
Dec 02, 2014#0183;#32;(2011) Efficient ballmill procedure in the green asymmetric aldol reaction organocatalyzed by (S)prolinecontaining dipeptides in the presence of
Jun 11, 2020#0183;#32;The desired aldol products were obtained in high yields (up to 94%) and good enantioselectivities (up to 97% ee). 17a In addition, Li and coworkers examined dipeptide ( 1c OH) in the asymmetric aldol reaction of different ketones and aldehydes in solid phase media (Al 2 O 3 ), using 1,4diazabicyclo[]octane as additive, observing
A Highly Efficient SolventFree Asymmetric Direct Aldol Reaction Organocatalyzed by Recoverable (s)BinamLProlinamides. and ball mill technique. These procedures allow one to reduce not only the amount of required ketone to 2 equiv but also the reaction time to give the aldol products with regio, diastereo, and enantioselectivities
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Jos#233; G. Hern#225;ndez, Eusebio Juaristi, Efficient ballmill procedure in the green asymmetric aldol reaction organocatalyzed by (S)prolinecontaining dipeptides in the presence of water, Tetredron, /, 67, 36, (), (2011).
ChemInform Abstract: Efficient BallMill Procedure in the Green Asymmetric Aldol Reaction Organocatalyzed by (S)ProlineContaining Dipeptides in the Presence of Water.
reactions Prior art date Application number PCT/KR2009/003405 Other languages English (en) French (fr) Other versions WOA2 (ko Inventor Original Assignee Priority date (The priority date is an assumption and is not a legal conclusion.
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Aug 20, 2013#0183;#32;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 details are revealed.
Efficient ballmill procedure in the green asymmetric aldol reaction organocatalyzed by (S)prolinecontaining dipeptides in the presence of water. Tetredron 2011, 67 (36), . https:////; TseLok Ho, Mary Fieser, Louis Fieser.
Sep 09, 2011#0183;#32;The organocatalytic activity of (S)prolinebased dipeptides 1ac 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
Efficient ballmill procedure in the green asymmetric aldol reaction organocatalyzed by (S)prolinecontaining dipeptides in the presence of water. Tetredron 2011, 67 (36), .
Efficient ballmill procedure in the green asymmetric aldol reaction organocatalyzed by ( S)prolinecontaining dipeptides in the presence of water
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