Aldol reaction
Stereoselective Aldol Reaction in Aqueous Solution Using Prolinamido Glycosides as Water Compatible Organocatalyst
... In a parallel series of experiments, known [21] [22] prolinamido-ethanols (3 and 4) were also used as catalyst in the aqueous aldol reaction of isobutyraldehyde and D-glyceraldehyde. Although the catalysts ...
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Highly asymmetric aldol reaction of cyclohexanone and aromatic aldehydes catalyzed by bifunctional cyclohexane derived thiourea organocatalyst
... the aldol reaction (Table 1, entry 4). The reaction proceeded smoothly to afford the anti-aldol product with a 75% yield and good ...the aldol reaction (Table 1, entries 5, 6, 7 ...
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Synthesis of D-pantolactone via Combined a Novel Organocatalyst Catalyzed Asymmetric Aldol Reaction and Hydrogenation Catalyzed by Cu-/SiO2
... In conclusion, we have developed a chiral ionic liquid containing L-histidine unit for asymmetric aldol reaction. The aldol reaction was carried out in the presence of [EMIm] [His] (30 mol%) ...
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I. [1,2]-Brook rearrangement : application of silyl glyoxylates in a novel glycolate aldol reaction and in a controlled oligomerization to complete the total synthesis of zaragozic acid C. II. Progress toward the total synthesis of pactamycin
... When reaction was complete by TLC the solution was filtered to remove salts and concentrated in ...the reaction mixture all at ...the reaction was monitored by TLC until no starting material was ...
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Novel rhodium (I)-catalysed tandem hydrosilylation-intramolecular aldol reaction
... 1.4.1 Transition metal-catalysed intermolecular reductive-aldol processes The regiocontrolled formation of a useful enolate anion for reactions such as aldolisation is traditionally achieved by deprotonation of an ...
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4819.pdf
... Because the cross metathesis between bis silyl ether 3.94 and dibromide 3.95 required in excess of 3.0 equivalents of bis silyl ether 3.94 to produce 3.100 in a reasonable yield, and because the selective deprotection of ...
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Studies in asymmetric catalysis
... Compound 278 was used as a catalyst for the Michael addition of ketones to trans-β- nitrostyrene; the addition of dimethyl malonate to trans-β-nitrostyrene; and an aldol reaction. In each case however, no ...
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Enantioselective Aldol Reactions of Aliphatic Aldehydes with Singh’s Catalyst
... The aldol reaction is one of the most important car- bon-carbon bond forming reactions ...where aldol reactions between two aliphatic aldehydes have been described ...in aldol reactions only ...
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Synthesis and Characterization of Hydrotalcite and Hydrotalcite Compounds and their Application as a Base Catalyst for Aldol Condensation Reaction
... typical Aldol Condensation reaction of propionaldehyde and formaldehyde to get desired product ...catalyzed Aldol reaction propionaldehyde coversion of ...said Aldol condensation ...
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Studies towards the total synthesis of Polyrhacitides, Dodoneine, Nhatrangins and Platencin
... acetate aldol reaction followed by using efficient synthetic strategies in iterative ...acetate aldol reaction with (S)-1-(4-benzyl-2-thioxothiazolidin-3-yl)ethanone and n-octanal in the ...
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One Pot Synthesis of Aldol Adduct Catalyzed by Immobilized Picolylamine on Zirconia
... Aldol reaction catalyzed by proline and picolylamine was extensively investigated for enantioselective carbon- carbon bond formation ...as aldol reaction of cyclohexanone with p-nitrobenzalde- ...
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Nanocrystalline Magenesium oxide / Pyrrolidine Derivatives for Selective and Enantioselective Organotransformations
... the aldol reaction in presence of ...the reaction media should be highly polar in ...asymmetric aldol reaction using proline as ...
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Marine solids/NaNO3: As Natural and Efficient Catalysts for Aldol condensation
... The raw materials, marine coral and cuttlebone, were collected from Bushehr coasts and then washed, dried, powdered and finally calcinated in an oven at 800 ºC for 2 hours to remove organic materials. The catalysts ...
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Green and Sustainable Heterogeneous Organo Catalyst for Asymmetric Aldol Reactions
... for aldol reaction of cyclohexanone and m-nitrobenzaldehyde, affording both high % yield and % ee value as shown in Figure ...The reaction under the same conditions in the presence of the catalyst ...
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Formation of α hydroxycarbonyl and α dicarbonyl compounds during degradation of monosaccharides
... retro- aldol reaction and α- and β-dicarbonyl ...(cross-Cannizzaro reaction), and mutual disproportionation are possible reaction pathways participating in the formation of α-hydroxycarbonyl ...
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Enantioselective Aldol Reactions and Michael Additions Using Proline Derivatives as Organocatalysts
... The aldol reaction and the Michael addition are very precious tools of the synthetic organic ...aqueous reaction conditions, are always extensively investigated ...
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Sí, Se Puede (Yes, We Can), Culturally Relevant Biographies: A study on the impact of culturally relevant biographies on social studies instruction
... with aldol reaction to afford phosphorylated aldol ...phosphorylated aldol adducts is expected to be toxic or, at least, a burden to ...resultant aldol adducts under physiological ...
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In vitro studies of the enzymes involved in fluorometabolite biosynthesis in Streptomyces cattleya
... retro-aldol reaction of a fuculose aldolase will result in the generation of FAd 40 and ...The reaction was followed by 19 F ...the reaction, and the experiments were run ...
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Combined Use of Macro and Microscale Chemistry in Undergraduate Organic Laboratory
... A mass balance of products and waste for each experiment was carried out, the results in table 3 showed that the higher value of E-factor was registered for Knoevenagel condensation and phospho-aldol ...
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DEVELOPMENT OF SOME IMPORTANT SYNTHETIC METHODOLOGIES AND THEIR APPLICATIONS IN THE SYNTHESIS OF BIOLOGICALLY IMPORTANT COMPOUNDS
... Evan’s aldol reaction between the aldehyde 33 and the chiral oxazolidinone 40, which in turn can be prepared from L- phenyl alanine 37, using a known ...
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