Efficient Ball Mill Procedure In The Green Asymmetric Aldol Reaction. 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 solvent-free conditions in a ball mill has been evaluated.,-dipeptide (s,s)-2 catalyzed the stereoselective formation of the ...

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 ...

Efficient Ball Mill Procedure In The Green Asymmetric Aldol Reaction. The organocatalytic activity of S-proline-based dipeptides 1ac 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 SS-1c proved to be an efficient organocatalyst ...

We have efficient ball mill procedure in the green asymmet,Sep 09, 2011· In summary, (S)-proline-based dipeptides 1a–c were prepared and evaluated as organocatalysts in the asymmetric aldol reaction under solvent-free condition in a ball mill. It was found that dipeptide (S,S)-proline-tryptophan-CO 2 Me 1cis the most efficient catalyst.

liberia efficient ball mill procedure in the green asymmetric aldol reaction sale. Efficient ballmill procedure in the 'green' asymmetric Sep 09 2011 Recently as part of our continuing interest in H 15a we examined the asymmetric aldol reaction between ketones and various aromatic aldehydes under solventfree conditions in a ball mill using almost stoichiometric amounts of ketone and ...

Efficient ballmill procedure in the 'green' asymmetric . Sep 09, 2011 · 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 millIn particular, the methyl ester of (S)proline(S)tryptophan, (S,S)1c, proved to be an efficient ...

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 ...

efficient ball mill procedure in the green asymmetric aldol reaction. A highly efficient asymmetric organoalytic aldol reaction in a ball Rodríguez B1 Efficient mixing of all the components is accomplished by applying a mechanochemical technique ball milling The alysis is air and moisture tolerant and can be performed with nonpurified starting materials

Efficient ballmill procedure in the 'green' asymmetric . Sep 09, 2011 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 millIn particular, the methyl ester of (S)proline(S)tryptophan, (S,S)1c, proved to be an efficient ...

Efficient Ball Mill Procedure In The Green Asymmetric Aldol Reaction. Pioneers in this field, bolm et al., reported that the asymmetric aldol reaction under solvent-free conditions and catalyzed by s-proline 10 mol in a ball mill, employing a 1.1 1 ketonealdehyde ratio, proceeded efficiently to give selectively the anti-aldol diastereomeric products in high yields and with up to 99 ...

ChemInform Abstract: Efficient Ball-Mill Procedure in the ′Green′ Asymmetric Aldol Reaction Organocatalyzed by (S)-Proline-Containing Dipeptides in the Presence of Water.

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. DOI: 10.1016/j.tet.2011.06.042.

Efficient ball-mill procedure in the 'green' asymmetric aldol reaction organocatalyzed by (S)-proline-containing dipeptides in the presence of water | José G. Hernández; Eusebio Juaristi | download | BookSC. Download books for free. Find books

Efficient ballmill procedure in the 'green' asymmetric . Sep 09, 2011 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 millIn particular, the methyl ester of (S)proline(S)tryptophan, (S,S)1c, proved to be an efficient ...

The desired aldol products were obtained in high yields (up to 94%) and good enantioselectivities (up to 97% ee). 17a In addition, Li and co-workers examined dipeptide ( 1c -OH) in the asymmetric aldol reaction of different ketones and aldehydes in solid phase media (Al 2 O 3 ), using 1,4-diazabicyclo[2.2.2]octane as additive, observing ...

Efficient ball-mill procedure in the 'green' asymmetric aldol. 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 ...

Efficient ball-mill procedure in the green asymmetric aldol reaction organocatalyzed by (S)-proline-containing dipeptides in the presence of water. Tetrahedron 2011 DOI 10.1016/j.tet.2011.06.042. Wenbo Huang Hua Tian Hao Xu Liangyu Zheng Qingwen Liu Suoqin Zhang. Get Price; Solvent-free asymmetric aldol reaction DeepDyve

green aldol ndensation by ball mill method. Efficient Ball Mill Procedure In The Green Asymmetric Aldol Reaction 2011 3 4the 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 solvent free conditions in a ball ...

efficient ball mill procedure in the green asymmetric. Efficient ball mill procedure in the green asymmetric aldol reaction organocatalyzed by S This result is in agreement with expectation that dipeptides of proline and a second hydrophobic residue should be efficient catalysts in aldol reaction due to the possible formation of a hydrophobic core

Solvent free approach using (S) proline containing dipeptides as organocatalysts in asymmetric aldol reactions. Scheme 5. Highly efficient . Get Price. binh duong mill in india . ... cost of mini red gram mill. efficient ball mill procedure in the green asymmetric aldol reaction Crusher manufacturers cost of mini red gram mill ball mill european .

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Efficient Ball Mill Procedure In The Green Asymmetric . Book ISGC 2013 ISGC 2015 / International Symposium on Green efficient ball mill procedure in the green asymmetric aldol reaction,24 May 2013 Renewable carbon and Eco-Efficient Process May 21-24th Study of heterogeneous catalysts for the aldol condensation of acetone E Lignier, N Sodium ...

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 solvent-free conditions in a ball mill has been evaluated. α,α-Dipeptide (S,S)-2 catalyzed the stereoselective formation of the expected aldol products, with higher diastereo- and ...

The Ion Tag Strategy as a Route to Highly Efficient . 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, Tetrahedron, 67, 36, (6953), (2011)

A Green and Efficient Asymmetric Aldol Reaction Catalyzed. Jun 22, 2010· José G. Hernández, Eusebio Juaristi,Efficient ball-mill procedure in the 'green' asymmetric aldol reaction organocatalyzed by (S)-proline-containing dipeptides in the presence of water, Tetrahedron, 10.1016/j.tet.2011.06.042, 67, 36, (6953-6959), (2011). Read more +

green aldol ndensation by ball mill method. Efficient Ball Mill Procedure In The Green Asymmetric Aldol Reaction 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 solvent free conditions in a ball mill has ...

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A Highly Efficient SolventFree Asymmetric Direct Aldol. Jul 04 2008 · Efficient ballmill procedure in the 'green' asymmetric aldol reaction organocatalyzed by Sprolinecontaining dipeptides in the presence of water Tetrahedron 2011 67 36 69536959 DOI …

Oct 11 2015 · Rodriguez B Bruckmann A Bolm C.A Highly Efficient Asymmetric OrganocatalyticAldol Reaction in a Ball Mill emEurJ2007 13 . Hernandez J G Juaristi E. Efficient ball-mill procedure in the green asymmetric aldol reaction organocatalyzed by (S)-proline-containing dipeptides in the presence of water. Tetrahedron2011 67 . Chat Online