Category: 73349-07-2

Mori, K.; Sasaki, M.; Tamada, S.; Suguro, T.; Masuda, S. published the artcile< Pheromone synthesis. XXIX. Synthesis of optically active 2-ethyl-1,6-dioxaspiro[4.4]nonane (chalcogran), the principal aggregation pheromone of Pityogenes chalcographus (L.)>, COA of Formula: C5H10O3, the main research area is chalcogran Pityogenes total synthesis.

The 2R,5RS and 2S,5RS isomers of chalcogran (I) were prepared as 40.1:59.9 and 41.3:58.7 mixtures, resp., of diastereoisomers. The key step (yield 30.1-9.4%) was alkylation of α-acetyl-γ-butyrolactone dianion by (R)-(+)- or (S)-(-)-1,2-epoxybutane followed by alk. hydrolysis, decarboxylation, and acidification.

Tetrahedron published new progress about Pheromones, animal, aggregating Role: RCT (Reactant), RACT (Reactant or Reagent). 73349-07-2 belongs to class esters-buliding-blocks, and the molecular formula is C5H10O3, COA of Formula: C5H10O3.

Referemce:
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics

Ferorelli, S.; Loiodice, F.; Tortorella, V.; Amoroso, R.; Bettoni, G.; Conte-Camerino, D.; De Luca, A. published the artcile< Isosteres of chiral clofibric acid analogs: synthesis, resolution, absolute configuration and HPLC detection of the optical purity>, COA of Formula: C5H10O3, the main research area is clofibric acid analog isostere preparation resolution; configuration absolute clofibric acid analog; resolution clofibric acid analog isostere.

Both racemic and enantiomeric forms of some isosteres of chiral clofibric acid analogs have been synthesized. Also, the absolute configuration has been established by chem. correlation and the optical purity determined by a simple HPLC procedure. The isosteric substitution of the ether oxygen atom of α-aryloxy alkanoic acids with sulfur, amino and methylene groups lead to compounds in which both biol. activity and stereoselectivity regarding chloride channel are highly reduced.

Farmaco published new progress about Absolute configuration. 73349-07-2 belongs to class esters-buliding-blocks, and the molecular formula is C5H10O3, COA of Formula: C5H10O3.

Referemce:
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics

Dongil, Ana B.; Bachiller-Baeza, Belen; Guerrero-Ruiz, Antonio; Rodriguez-Ramos, Inmaculada published the artcile< Graphite oxide as support for the immobilization of Ru-BINAP: Application in the enantioselective hydrogenation of methylacetoacetate>, Name: (R)-Methyl 2-hydroxybutanoate, the main research area is methyl acetoacetate hydrogenation catalyst modified graphite oxide support.

Graphite oxide (GO), previously functionalized with an alkoxysilane or with an isocyanate, and a chiral amine, was used as support for the immobilization of the homogeneous Ru-BINAP complex. The functionalized supports and the hybrid catalysts were characterized by XRD, NMR, TG, DRIFTS and XPS techniques. Among the hybrid catalysts the more active and enantioselective in the hydrogenation of Me acetoacetate is the sample prepared over the nonfunctionalized GO. The catalytic performance can be interpreted in terms of the metal complex interacting with the O functional groups or with the chiral amine at its different locations, anchored covalently onto the Cl pendant positions or via acid-base interaction at the O functional groups.

Catalysis Communications published new progress about Catalyst supports. 73349-07-2 belongs to class esters-buliding-blocks, and the molecular formula is C5H10O3, Name: (R)-Methyl 2-hydroxybutanoate.

Referemce:
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics

Adam, Waldemar; Fell, Rainer T.; Hoch, Ute; Saha-Moeller, Chantu R.; Schreier, Peter published the artcile< Kinetic resolution of chiral α-hydroperoxy esters by horseradish peroxidase-catalyzed enantioselective reduction to α-hydroxy esters>, COA of Formula: C5H10O3, the main research area is kinetic resolution chiral hydroperoxy ester; horseradish peroxidase catalyzed enantioselective reduction; hydroxy ester.

The kinetic resolution of the Me α-hydroperoxy esters 4 has been investigated by horseradish peroxidase (HRP)-catalyzed reduction to the corresponding optically active α-hydroxy esters 5 in the presence of guaiacol. The method allows for the first time the preparation of enantiomerically pure (ee > 97%) Me (R)-2-hydroperoxybutyrate (4a). The HRP enzyme is sensitive to the steric demand of the ester alkyl side chain, as manifested by Et (ee > 97%) and iso-Pr (ee 79%), while the tert-Bu derivative is not accepted by the enzyme (no reduction).

Tetrahedron: Asymmetry published new progress about Chiral recognition. 73349-07-2 belongs to class esters-buliding-blocks, and the molecular formula is C5H10O3, COA of Formula: C5H10O3.

Referemce:
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics

Koenig, W. A. published the artcile< Collection of enantiomeric separation factors obtained by capillary gas chromatography on chiral stationary phases>, Category: esters-buliding-blocks, the main research area is capillary gas chromatog enantiomer separation factor; cyclodextrin chiral derivative gas chromatog resolution.

Capillary gas chromatog. enantiomeric separation factors, column length, and temperature are tabulated for 295 racemates on the chiral stationary phase octakis(3-O-butyryl-2,6-di-O-pentyl)-γ-cyclodextrin (Lipodex E). The major classes of compounds included: alcs., ketones, carboxylic acids, lactones, hydroxy carboxylic acids, amino acids, and sulfoxides. The racemates were chromatographed either in underivatized form, trifluoroacetates or acetates (many alcs.), Me or Et esters (many carboxylic acids), N-trifluoroacetyl derivatives (amino acids), N-alkoxycarbonyl derivatives (histidine), or containing a combination of these derivatizing groups.

Journal of High Resolution Chromatography published new progress about Alcohols Role: PUR (Purification or Recovery), RCT (Reactant), PREP (Preparation), RACT (Reactant or Reagent). 73349-07-2 belongs to class esters-buliding-blocks, and the molecular formula is C5H10O3, Category: esters-buliding-blocks.

Referemce:
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics

Koenig, W. A. published the artcile< Collection of enantiomeric separation factors obtained by capillary gas chromatography on chiral stationary phases>, Category: esters-buliding-blocks, the main research area is capillary gas chromatog enantiomer separation factor; cyclodextrin chiral derivative gas chromatog resolution.

Capillary gas chromatog. enantiomeric separation factors, column length, and temperature are tabulated for 295 racemates on the chiral stationary phase octakis(3-O-butyryl-2,6-di-O-pentyl)-γ-cyclodextrin (Lipodex E). The major classes of compounds included: alcs., ketones, carboxylic acids, lactones, hydroxy carboxylic acids, amino acids, and sulfoxides. The racemates were chromatographed either in underivatized form, trifluoroacetates or acetates (many alcs.), Me or Et esters (many carboxylic acids), N-trifluoroacetyl derivatives (amino acids), N-alkoxycarbonyl derivatives (histidine), or containing a combination of these derivatizing groups.

Journal of High Resolution Chromatography published new progress about Alcohols Role: PUR (Purification or Recovery), RCT (Reactant), PREP (Preparation), RACT (Reactant or Reagent). 73349-07-2 belongs to class esters-buliding-blocks, and the molecular formula is C5H10O3, Category: esters-buliding-blocks.

Referemce:
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics