LAUSR

Bipyridine-Proline Grafted Silicas with Different Mesopore Structures: Their Catalytic Performance in Asymmetric Aldol Reaction and Structure Effect

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0 Published in 2018 at "Catalysis Letters"

DOI: 10.1007/s10562-018-2421-5

Abstract: A series of immobilized bipyridine-proline based on mesoporous silica with different structures were synthesized via grafting followed by coordination method. All catalysts were used in asymmetric aldol reaction of cyclohexanone with 4-nitrobenzaldehyde, and their catalytic… read more here.

Keywords: bipyridine proline; aldol reaction; performance; asymmetric aldol ... See more keywords

Carane amino alcohols as organocatalysts in asymmetric aldol reaction of isatin with acetone

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0 Published in 2017 at "Russian Chemical Bulletin"

DOI: 10.1007/s11172-017-1730-y

Abstract: Carane-derived β-amino alcohols with amino and hydroxy groups at positions 3 and 4 differing in their mutual arrangement and configuration were synthesized. Their application as organocatalysts in the asymmetric aldol reaction of isatin with acetone… read more here.

Keywords: isatin acetone; aldol reaction; organocatalysts asymmetric; amino alcohols ... See more keywords

Monofunctional primary amine: A new class of organocatalyst for asymmetric Aldol reaction

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0 Published in 2017 at "Journal of Chemical Sciences"

DOI: 10.1007/s12039-017-1237-y

Abstract: AbstractA new class of organocatalysts involving a primary amine as the only functional group is developed for catalytic asymmetric aldol reaction of cyclohexanone/cyclopentanone with various aryl aldehydes in the presence of benzoic acid as an… read more here.

Keywords: new class; aldol reaction; reaction; primary amine ... See more keywords

Significant Improvement on Enantioselectivity and Diastereoselectivity of Organocatalyzed Asymmetric Aldol Reaction Using Helical Polyisocyanides Bearing Proline Pendants

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0 Published in 2017 at "ACS Macro Letters"

DOI: 10.1021/acsmacrolett.7b00439

Abstract: A novel enantiopure phenyl isocyanide (1) carrying l-proline derivative was designed and synthesized. Living polymerization of 1 using a alkyne-Pd(II) catalyst affording a series of helical poly-1ms with controlled molecular weights (Mns) and narrow molecular… read more here.

Keywords: proline pendants; bearing proline; aldol reaction; poly ... See more keywords

Self-Assembly of Amphiphilic Dipeptide with Homo- and Heterochiral Centers and Their Application in Asymmetric Aldol Reaction

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0 Published in 2018 at "ACS Omega"

DOI: 10.1021/acsomega.8b00852

Abstract: Chiral self-assembly has drawn increasing interest in supramolecular chemistry. Here, we have designed amphiphilic l-Pro–l-Glu and l-Pro–d-Glu dipeptides and investigated their chiral self-assembly as well as asymmetric catalytic performance to disclose the synergistic effect of… read more here.

Keywords: dipeptide homo; self assembly; amphiphilic dipeptide; assembly amphiphilic ... See more keywords

Development of fructose-1,6-bisphosphate aldolase enzyme peptide mimics as biocatalysts in direct asymmetric aldol reactions

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0 Published in 2021 at "RSC Advances"

DOI: 10.1039/d1ra06616a

Abstract: Novel asymmetric aldol reaction catalysing fructose-1,6-bisphosphate aldolase peptide mimics with secondary structural motifs. read more here.

Keywords: asymmetric aldol; bisphosphate aldolase; fructose bisphosphate; peptide mimics ... See more keywords

Polyacrylic Acid Supported L-proline as an Effective Heterogeneous Catalyst for the Direct Asymmetric Aldol Reaction.

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0 Published in 2023 at "Current organic synthesis"

DOI: 10.2174/1570179420666230330085329

Abstract: INTRODUCTION L-proline is an efficient chiral small-molecule organocatalyst for the direct asymmetric aldol reaction between unmodified acetone and a variety of aldehydes. METHOD However, it is difficult to separate from the reaction medium for reuse.… read more here.

Keywords: catalyst; reaction; asymmetric aldol; aldol reaction ... See more keywords

Bioinspired Polymer-Bound Organocatalysts for Direct Asymmetric Aldol Reaction: Experimental and Computational Studies

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0 Published in 2019 at "Catalysts"

DOI: 10.3390/catal9050398

Abstract: A series of poly(2-oxazoline) (POX) derivatives bearing prolinamide pendants were designed as organocatalysts and evaluated in the direct asymmetric aldol reaction between aromatic aldehydes and cyclic ketones. The structural variation of the alkyl spacer connecting… read more here.

Keywords: aldol reaction; bound; aldol; reaction ... See more keywords

Tripeptide-Catalyzed Asymmetric Aldol Reaction Between α-ketoesters and Acetone Under Acidic Cocatalyst-Free Conditions

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0 Published in 2019 at "Catalysts"

DOI: 10.3390/catal9060514

Abstract: Here, we report the tripeptide-catalyzed asymmetric aldol reaction between α-ketoesters and acetone under acidic cocatalysts-free conditions. H-Pro-Tle-Gly-OH 3g-catalyzed reactions between α-ketoesters and acetone resulted in up to 95% yield and 88% ee. Analysis of the… read more here.

Keywords: aldol reaction; reaction ketoesters; tripeptide catalyzed; ketoesters acetone ... See more keywords

Stereoselective Synthesis of Oxazolidin-2-ones via an Asymmetric Aldol/Curtius Reaction: Concise Total Synthesis of (−)-Cytoxazone

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0 Published in 2021 at "Molecules"

DOI: 10.3390/molecules26030597

Abstract: Herein, we are reporting an efficient approach toward the synthesis of 4,5-disubstituted oxazolidin-2-one scaffolds. The developed approach is based on a combination of an asymmetric aldol and a modified Curtius protocol, which uses an effective… read more here.

Keywords: synthesis cytoxazone; total synthesis; concise; asymmetric aldol ... See more keywords