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efficient ball mill procedure in the green asymmetric aldol reaction

Green and efficient technique for the three component synthesis of .1. Green and efficient technique for the three component synthesis of. 2-aminothiophenes using ball-milling method through Gewald reaction. Mohamed Ould . Suzoku-type reaction [28], synthesis of functionalized indan-1,3-diones [29], aldol reaction . General Procedure for the Synthesis of Pyridine Compound 3a.efficient ball mill procedure in the green asymmetric aldol reaction,José G. Hernández (0000-0001-9064-4456) - ORCID | Connecting .Synthesis of 3-Iodobenzofurans by Electrophilic Cyclization under Solventless Conditions in a Ball Mill European Journal of Organic Chemistry. 2018-02 ... Efficient ball-mill procedure in the 'green' asymmetric aldol reaction organocatalyzed by (S)-proline-containing dipeptides in the presence of water Tetrahedron.

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Mechanochemistry assisted asymmetric organocatalysis: A .Dec 6, 2012 . Green chemistry involves innovation in chemical research and engineering that encourages the design of processes to minimize the use and . 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].efficient ball mill procedure in the green asymmetric aldol reaction,Earthworms as a Biocatalyst: In Asymmetric Aldol Reactions - Guo .Aug 7, 2017 . A crude extract from earthworms was used as an environmentally friendly and easily accessible biocatalyst for asymmetric direct aldol reactions. . and Evaluation of (S)-Proline-Containing α,β-Dipeptides as Organocatalysts in Solvent-Free Asymmetric Aldol Reactions under Ball-Milling Conditions. Asian J.

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Solvent-free enantioselective organocatalyzed aldol reactions - Core

Product 32 - 71 . Mukaiyama-aldol reaction [4] gave a definitive impulse of the catalytic enantioselective version [5] of . The first solvent-free intermolecular aldol reaction involved the use of a ball mill [22]. .. 1464-1467; (b) Hernández, J. G.; Juaristi, E. Efficient ball-mill procedure in the ‗green' asymmetric aldol reaction.

Green and efficient technique for the three component synthesis of .

1. Green and efficient technique for the three component synthesis of. 2-aminothiophenes using ball-milling method through Gewald reaction. Mohamed Ould . Suzoku-type reaction [28], synthesis of functionalized indan-1,3-diones [29], aldol reaction . General Procedure for the Synthesis of Pyridine Compound 3a.

José G. Hernández (0000-0001-9064-4456) - ORCID | Connecting .

Synthesis of 3-Iodobenzofurans by Electrophilic Cyclization under Solventless Conditions in a Ball Mill European Journal of Organic Chemistry. 2018-02 ... Efficient ball-mill procedure in the 'green' asymmetric aldol reaction organocatalyzed by (S)-proline-containing dipeptides in the presence of water Tetrahedron.

Earthworms as a Biocatalyst: In Asymmetric Aldol Reactions - Guo .

Aug 7, 2017 . A crude extract from earthworms was used as an environmentally friendly and easily accessible biocatalyst for asymmetric direct aldol reactions. . and Evaluation of (S)-Proline-Containing α,β-Dipeptides as Organocatalysts in Solvent-Free Asymmetric Aldol Reactions under Ball-Milling Conditions. Asian J.

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Mechanochemistry assisted asymmetric organocatalysis: A .

Dec 6, 2012 . Green chemistry involves innovation in chemical research and engineering that encourages the design of processes to minimize the use and . 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].

Mechanochemical Solvent-Free and Catalyst-Free One . - CiteSeerX

Jan 19, 2009 . as being environmentally friendly, using a simple workup procedure, and affording high yields. Keywords: Solvent-free reaction; . aldol reaction [21]. Numerous typical examples of scaling up of the use of ball-mills have been given for organic and some inorganic syntheses. These include solvent-free salt.

Molecules | Free Full-Text | An Increased Understanding of Enolate .

Apr 27, 2017 . Given the propensity of enolates to form aldol condensations products very rapidly under milling conditions, we conducted all subsequent enolate addition reactions in one-step instead of the two-step process traditionally executed in solution. With a clearer understanding of the reactivity trends of enolates.

Development in Organocatalysis – The Green . - ResearchGate

Jan 20, 2017 . give selectively the anti-aldol diastereomeric products in high yields and with up to 99% enantiomeric excess [74] (Scheme 11). Scheme 11. Solvent-Free Asymmetric. Organocatalyzed aldol reaction in a Ball Mill. In this study, Bolm and co-workers [70-72] demonstrated that the efficiency of the process.

Recent Advances in Sustainable Organocatalysis

remarkable advancements in organocatalysis using green and sustainable protocols. Keywords: water, solvent-free . Supported catalytic processes as efficient, greener and recyclable methodologies for . The direct aldol reaction. The capability of proline (1) to promote asymmetric direct intra-molecular aldol reactions was.

Reacciones asimétricas organocatalizadas en ausencia de .

According with the principles of “green” chemistry, asymmetric organocatalysis aims to become a sustainable strategy to catalyze a wide range of chemical transformations. ... Efficient ball-mill procedure in the 'green' asymmetric aldol reaction organocatalyzed by (S)-proline-containing dipeptides in the presence of water.

Dr Eusebio Juaristi Areas de Investigacion

(29) J.G. Hernández y E. Juaristi, “Efficient Ball-Mill Procedure in the “Green” Asymmetric Aldol Reaction Organocatalyzed by (S)-Proline-Containing Dipeptides in the Presence of Water”, Tetrahedron, 67, 6953-6959 (2011). (30) M. Escudero-Casao y E. Juaristi, “Asymmetric Synthesis of 2-homo-tert-leucine mediated via.

Mechanochemical synthesis of small organic molecules - Europe PMC

Sep 11, 2017 . To address one of the major issues of green chemistry, i.e., minimizing chemical-waste/energy, solvent-free syntheses have become a popular research topic [8]. The mechanochemical techniques like ball-milling or hand grinding are considered to be promising candidates in solvent-free synthesis [10–11].

How are Waste Entirely Avoided in Solid-State Productions .

Typically, such procedures, are incomplete (e.g., 59% yield, not citing the review with more than 1000 waste- free solid-state reactions in at least 26 different . Nevertheless, the journal "Green Chemistry" had published the wasteful reduction by "high speed ball milling" of four arylaldehydes and four acetylbenzenes with.

Reacciones asimétricas organocatalizadas en ausencia de disolvente

28 Ene 2013 . ABSTRACT (Solvent-free asymmetric organocatalyzed reactions: a strategy towards a greener organocatalysis). According with the . KEYWORDS: Asymmetric organocatalysis, green chemistry, solvent-free reactions, ball-milling ... Hernández, J. G., Juaristi, E., Efficient ball-mill procedure in the 'green'.

556 K - International Journal of Nano Dimension

Oct 28, 2013 . Reaction was performed in a mechanical manner by co-grinding the reactants with agate milling balls using a planetary ball mill as the source for .. Green Chemistry. 10: 1131–. 1141. [12] Bruckmann A., Bolm C., Rodríguez C.,. (2007), A Highly Efficient Asymmetric. Organocatalytic Aldol Reaction in a Ball.

Green Organocatalyst Reaction | Catalysis | Chemical Reactions

One of the most studied processes is the direct intermolecular asymmetric aldol condensation catalysed by proline 32 and primary amines, 33 which generally uses DMSO as solvent. The same reaction has been demonstrated to also occur using mechanochemical techniques, under solvent-free ball-milling condi- tions. 34

Most Cited Tetrahedron Letters Articles - Elsevier

A new, efficient, one-pot multicomponent reaction for the synthesis of diazepine derivatives in excellent yields is described. The reactions of .. Fast, solvent-free asymmetric alkynylation of prochiral sp3 C-H bonds in a ball mill for the preparation of optically active tetrahydroisoquinoline derivatives. Volume 54, Issue 15, April.

efficient ball mill procedure in the green asymmetric aldol reaction,

Solvent-Free Henry and Michael Reactions with Nitroalkanes .

May 21, 2017 . In the case of the nitroaldol reaction, the main side product is the formation of the nitroalkene through a further condensation reaction of the nitroalcohol. In some cases the use of certain catalysts resulted in the production of a conjugated enone through an aldol condensation side reaction, whereas some.

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