Tag: M.W=150-200

Wang, Tianli published the artcileRegiodivergent Enantioselective γ-Additions of Oxazolones to 2,3-Butadienoates Catalyzed by Phosphines: Synthesis of α,α-Disubstituted α-Amino Acids and N,O-Acetal Derivatives, Application In Synthesis of 10047-10-6, the main research area is aryl alkyl oxazolone butadienoate chiral phosphine regioselective enantioselective addition; disubstituted oxazolone stereoselective preparation ring opening; amino acid disubstituted stereoselective preparation; alkyl aryl oxazolone butadienoate chiral phosphine regioselective enantioselective addition; oxazolone disubstituted stereoselective preparation reduction; acetal lactol preparation.

Phosphine-catalyzed regiodivergent enantioselective C-2- and C-4-selective γ-additions of oxazolones to 2,3-butadienoates have been developed. The C-4-selective γ-addition of oxazolones occurred in a highly enantioselective manner when 2-aryl-4-alkyloxazol-5-(4H)-ones were employed as pronucleophiles. With the employment of 2-alkyl-4-aryloxazol-5-(4H)-ones as the donor, C-2-selective γ-addition of oxazolones took place in a highly enantioselective manner. The C-4-selective adducts I (R = Et, Me, n-Pr,i-Pr, n-Bu, etc.; Ar = 4-MeOC6H4, Ph, 4-FC6H4) provided rapid access to optically enriched α,α-disubstituted α-amino acid derivatives, and the C-2-selective products II (R = Et, Me, n-Pr,i-Pr, n-Bu, etc.; Ar = Ph, 2-naphthyl, 1-naphthyl) led to facile synthesis of chiral N,O-acetals and γ-lactols. Theor. studies via DFT calculations suggested that the origin of the observed regioselectivity was due to the distortion energy that resulted from the interaction between the nucleophilic oxazolide and the electrophilic phosphonium intermediate.

Journal of the American Chemical Society published new progress about Acetals Role: SPN (Synthetic Preparation), PREP (Preparation) (N,O-). 10047-10-6 belongs to class esters-buliding-blocks, name is Methyl 2-aminopentanoate hydrochloride, and the molecular formula is C6H14ClNO2, Application In Synthesis of 10047-10-6.

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

Tekguel, Yeliz published the artcileDetermination of the effect of wheat germ on the mineral and fatty acid composition and aroma compounds of tarhana: A traditional fermented cereal food, Related Products of esters-buliding-blocks, the main research area is tarhana wheat germ mineral fatty acid aroma compound detection.

In this study, to supply to the trend toward natural and functional foods that do not include synthetic products, the wheat germ which exists as waste in nature was added to tarhana formulation in order to increase the nutritional content of tarhana. Wheat germ supplemented tarhana samples met the recommended dietary allowances of iron. A total of 63 compounds were detected and quantitated in all samples. Terpenes and terpenoids were observed as the dominant compound group. The addition of wheat germ to tarhana dough resulted in an increase in the number of volatile compounds The most abundant odor-active compounds were acetic acid and 2-acetylpyyrole.The mineral (Mg, K, Zn, Mn), fatty acid (undecaenoic, linoleic, gondoic acid, and α-linolenic), oil, acid (propanoic and hexanoic), alc. (linalool, benzyl, phenylethyl), aldehyde ((E)-2-heptenal, nonanal, 5-methyl-2-phenyl-2-hexenal), ketone (3-Octen-2-one), terpene (junipene, citronellol, trans-Carveol) contents of tarhana samples can be increased by addition of the wheat germ. The wheat germ which exists as waste in nature and contains a high amount of essential amino acids, proteins, fatty acids, minerals, dietary fiber, vitamins, etc. Wheat germ can be added to cereal-based food formulation such as tarhana in order to supply to the trend toward natural and functional foods that do not include synthetic products. Tarhana (basically made from yogurt, wheat flour, herbs, tomato, pepper, onion, etc.) which is a traditional fermented dry Turkish soup is rich in vitamins, minerals, and proteins. Wheat germ based-fermented products such as Tarhana may be considered promising new functional foods due to its probiotic effects in order to expand the market due to the increasing trend toward functional foods.

Journal of Food Processing and Preservation published new progress about Acids Role: ANT (Analyte), PRP (Properties), ANST (Analytical Study). 123-29-5 belongs to class esters-buliding-blocks, name is Ethyl nonanoate, and the molecular formula is C11H22O2, Related Products of esters-buliding-blocks.

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

Tekguel, Yeliz published the artcileDetermination of the effect of wheat germ on the mineral and fatty acid composition and aroma compounds of tarhana: A traditional fermented cereal food, Recommanded Product: Ethyl octanoate, the main research area is tarhana wheat germ mineral fatty acid aroma compound detection.

In this study, to supply to the trend toward natural and functional foods that do not include synthetic products, the wheat germ which exists as waste in nature was added to tarhana formulation in order to increase the nutritional content of tarhana. Wheat germ supplemented tarhana samples met the recommended dietary allowances of iron. A total of 63 compounds were detected and quantitated in all samples. Terpenes and terpenoids were observed as the dominant compound group. The addition of wheat germ to tarhana dough resulted in an increase in the number of volatile compounds The most abundant odor-active compounds were acetic acid and 2-acetylpyyrole.The mineral (Mg, K, Zn, Mn), fatty acid (undecaenoic, linoleic, gondoic acid, and α-linolenic), oil, acid (propanoic and hexanoic), alc. (linalool, benzyl, phenylethyl), aldehyde ((E)-2-heptenal, nonanal, 5-methyl-2-phenyl-2-hexenal), ketone (3-Octen-2-one), terpene (junipene, citronellol, trans-Carveol) contents of tarhana samples can be increased by addition of the wheat germ. The wheat germ which exists as waste in nature and contains a high amount of essential amino acids, proteins, fatty acids, minerals, dietary fiber, vitamins, etc. Wheat germ can be added to cereal-based food formulation such as tarhana in order to supply to the trend toward natural and functional foods that do not include synthetic products. Tarhana (basically made from yogurt, wheat flour, herbs, tomato, pepper, onion, etc.) which is a traditional fermented dry Turkish soup is rich in vitamins, minerals, and proteins. Wheat germ based-fermented products such as Tarhana may be considered promising new functional foods due to its probiotic effects in order to expand the market due to the increasing trend toward functional foods.

Journal of Food Processing and Preservation published new progress about Acids Role: ANT (Analyte), PRP (Properties), ANST (Analytical Study). 106-32-1 belongs to class esters-buliding-blocks, name is Ethyl octanoate, and the molecular formula is C10H20O2, Recommanded Product: Ethyl octanoate.

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

Miura, Hiroki published the artcilePractical Synthesis of Allyl, Allenyl, and Benzyl Boronates through SN1′-Type Borylation under Heterogeneous Gold Catalysis, COA of Formula: C9H10O2, the main research area is allyl allenyl benzyl boronate preparation gold titanium dioxide; propargyl carbonate allylic benzylic ester borylation.

Efficient borylation of sp3 C-O bonds by supported Au catalysts is described. Au nanoparticles supported on TiO2 showed high activity under mild conditions employing low catalyst loading conditions without the aid of any additives, such as phosphine and bases. A variety of allyl, propargyl, and benzyl substrates participated in the heterogeneously catalyzed reactions to furnish the corresponding allyl, allenyl, and benzyl boronates in high yields. Besides, Au/TiO2 was also effective for the direct borylation of allylic and benzylic alcs. A mechanistic investigation based on a Hammett study and control experiments revealed that sp3 C-O bond borylation over supported Au catalysts proceeded through SN1′-type mechanism involving the formation of a carbocationic intermediate. The high activity, reusability, and environmental compatibility of the supported Au catalysts as well as the scalability of the reaction system enable the practical synthesis of valuable organoboron compounds

ACS Catalysis published new progress about Alkynes Role: RCT (Reactant), RACT (Reactant or Reagent) (carbonate). 140-11-4 belongs to class esters-buliding-blocks, name is Benzyl acetate, and the molecular formula is C9H10O2, COA of Formula: C9H10O2.

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

Liu, Fang-Jing published the artcileGreen and efficient two-step degradation approach for converting Powder River Basin coal into fuels/chemicals and insights into their chemical compositions, Computed Properties of 123-29-5, the main research area is carbon dioxide ethanol degradation powder river basin coal.

A green and efficient two-step degradation approach, including supercritical CO2/ethanol degradation and oxidation in aqueous hydrogen peroxide solution, was reported to convert Powder River Basin coal into fuels/chems. In total, 43.5 wt% liquid tar and 23.3 wt% oxidation products were obtained from the two-step degradation The liquid tar was facilely separated into light oil and asphaltene, with yields of 27.3 wt% and 16.5 wt%, resp. The first-step degradation has high energy recovery (50%) and low energy consumption ratio (min. 0.17), indicating an energetic net energy gain. The light oil is a promising feedstock as clean liquid fuels due to its high H/C ratio (1.58) and heating value (34.56 MJ/kg). The asphaltene with lower H/C and O/C ratios but higher aromaticity (0.83) could be a good precursor for carbon materials. The light oil can be upgraded into clean liquid fuels by hydrodeoxygenation or used as feedstock for producing oxygenated chems. because it is rich in oxygenated components. Phenols and aliphatic esters account for 74.2% of the volatile components in the light oil. High resolution mass spectrometric anal. revealed that the O1-O4 class species are dominant components with relative abundance of 71% in the light oil. Valuable carboxylic acids with total yields of 19.7 wt%, especially alkanedioic and alkanetricarboxylic acids, were produced from oxidation of the scCO2/ethanol degradation residue, which is a promising second-step degradation to utilize the residue. This study provides an efficient coal conversion processes for producing fuels/chems. and reducing energy consumption and environmental impact.

Applied Energy published new progress about Asphaltenes Role: PUR (Purification or Recovery), PREP (Preparation). 123-29-5 belongs to class esters-buliding-blocks, name is Ethyl nonanoate, and the molecular formula is C11H22O2, Computed Properties of 123-29-5.

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

Taniguchi, Moyu published the artcileProfiling of volatile compounds in Japanese sake stored in sherry casks using solid phase microextraction/gas chromatography/mass spectrometry analysis, Related Products of esters-buliding-blocks, the main research area is volatile compound sherry casks solid phase microextraction gas chromatog; Barrel storage; Gas chromatography/mass spectrometry; Japanese sake; Sherry cask; Solid phase microextraction; Tris(hydroxymethyl)aminomethane.

The combination of solid phase microextraction (SPME) and gas chromatograph-mass spectrometer (GC-MS) is frequently used for comprehensive anal. of aroma components in foods because it can be used to easily analyze volatile components, allowing saving of the amount of solvent used. In this study, SPME-GC-MS anal. of sake samples before and after sherry cask storage was performed to investigate the special flavor derived from sherry cask storage. A GC column with polyethylene glycol as the stationary phase, which is the first choice for volatile component anal., was used. However, the peak of the acid having a carbonyl group was tailed due to its bond with the hydroxyl group of the stationary phase. In the anal. of sake samples, a large and tailing peak derived from the large amount of fatty acids in Japanese sake was observed Addnl., it was not possible to analyze other co-eluting components. To overcome this problem, a novel extraction condition was examined using SPME and tris (hydroxymethyl) aminomethane (Tris). By adding Tris solution to sake, the fatty acid peak was removed successfully, thereby facilitating anal. of the peaks of compounds co-eluting with fatty acids and comprehensive anal. of the aroma components in sake. Furthermore, a comparative anal. of sake before and after storage in sherry cask showed that levels of fatty alcs., organic acid esters, fatty acid esters, and terpenes increased significantly after storage in sherry cask, suggesting that these ingredients might constitute the special flavor of sherry cask-stored sake.

Journal of Bioscience and Bioengineering published new progress about Acids Role: FFD (Food or Feed Use), BIOL (Biological Study), USES (Uses). 123-29-5 belongs to class esters-buliding-blocks, name is Ethyl nonanoate, and the molecular formula is C11H22O2, Related Products of esters-buliding-blocks.

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

Behera, Rakesh R. published the artcileHydrosilylation of Esters Catalyzed by Bisphosphine Manganese(I) Complex: Selective Transformation of Esters to Alcohols, Safety of Methyl decanoate, the main research area is alc diol preparation; Xantphos manganese complex preparation chemoselective hydrosilylation catalyst crystal structure; manganese catalyst chemoselective hydrosilylation ester.

A tricarbonylruthenium Xantphos complex I was prepared and characterized by X-ray crystallog.; in the presence of I, esters underwent chemoselective hydrosilylation with phenylsilane under neat conditions (followed by workup with base) to yield esters. Aryl, alkyl, and alkenyl mono- and dicarboxylates and lactones underwent chemoselective reduction to alcs. and diols; ketoesters underwent reduction to diols. Poly(1,6-hexanediol adipate) underwent hydrosilylation to 1,6-hexanediol.

Organic Letters published new progress about Aliphatic alcohols Role: SPN (Synthetic Preparation), PREP (Preparation). 110-42-9 belongs to class esters-buliding-blocks, name is Methyl decanoate, and the molecular formula is C11H22O2, Safety of Methyl decanoate.

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

Behera, Rakesh R. published the artcileHydrosilylation of Esters Catalyzed by Bisphosphine Manganese(I) Complex: Selective Transformation of Esters to Alcohols, Safety of Benzyl acetate, the main research area is alc diol preparation; Xantphos manganese complex preparation chemoselective hydrosilylation catalyst crystal structure; manganese catalyst chemoselective hydrosilylation ester.

A tricarbonylruthenium Xantphos complex I was prepared and characterized by X-ray crystallog.; in the presence of I, esters underwent chemoselective hydrosilylation with phenylsilane under neat conditions (followed by workup with base) to yield esters. Aryl, alkyl, and alkenyl mono- and dicarboxylates and lactones underwent chemoselective reduction to alcs. and diols; ketoesters underwent reduction to diols. Poly(1,6-hexanediol adipate) underwent hydrosilylation to 1,6-hexanediol.

Organic Letters published new progress about Aliphatic alcohols Role: SPN (Synthetic Preparation), PREP (Preparation). 140-11-4 belongs to class esters-buliding-blocks, name is Benzyl acetate, and the molecular formula is C9H10O2, Safety of Benzyl acetate.

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

Chen, Yaoyao published the artcileBu4NI-Catalyzed C-C Bond Cleavage and Oxidative Esterification of Allyl Alcohols with Toluene Derivatives, Formula: C9H10O2, the main research area is arylpropenol toluene oxidative esterification tetrabutylammonium iodide catalyst; ester preparation.

A novel oxidative esterification of 1-arylprop-2-en-1-ols R1CH(OH)CH=CHR2 (R1 = Ph, 2-chlorophenyl, 4-bromophenyl, etc.; R2 = H, Me, 3-methoxyphenyl) with toluene derivatives ArMe (Ar = Ph, 3-chlorphenyl, 2-naphthyl, etc.) catalyzed by tetrabutylammonium iodide (TBAI) is reported. The optimization of the reaction conditions illustrates that each of experiment parameters including the catalyst, solvent, and oxidant is significant for present oxidative functionalization. This metal-free protocol has a broad substrate scope including the halogen groups for further functionalization and enriches the reactivity profile of allyl alc. and toluene derivatives In addition, this protocol represents a new transformation of allyl alc. involving C-C bond cleavage and C-O bond forming.

Synthesis published new progress about Allylic alcohols Role: RCT (Reactant), RACT (Reactant or Reagent) (aryl). 140-11-4 belongs to class esters-buliding-blocks, name is Benzyl acetate, and the molecular formula is C9H10O2, Formula: C9H10O2.

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

Nan, He published the artcileExamining the unique retention behavior of volatile carboxylic acids in gas chromatography using zwitterionic liquid stationary phases, Application of Methyl decanoate, the main research area is volatile carboxylic acid gas chromatog zwitterionic liquid stationary phase; Gas chromatography; Solvation parameter model; Stationary phase; Volatile carboxylic acids; Zwitterionic liquid.

For the first time, gas chromatog. (GC) stationary phases consisting of zwitterionic liquids (ZILs) possessing sulfonate functional groups were utilized for the anal. of volatile carboxylic acids (VCAs). The highly polar and acidic nature of VCAs significantly limits the number of currently available GC stationary phases, which are all largely based on acid-modified polyethylene glycol. In this study, it is shown that this class of ZILs exhibit strong retention of VCAs with excellent peak symmetry. Unique chromatog. selectivity toward VCAs is also demonstrated by tuning the structural features of the ZILs. The solvation properties of the three ZILs as well as a structurally similar conventional monocationic IL were characterized using the Abraham solvation parameter model.

Journal of Chromatography A published new progress about Carboxylic acids Role: ANT (Analyte), ANST (Analytical Study) (volatile). 110-42-9 belongs to class esters-buliding-blocks, name is Methyl decanoate, and the molecular formula is C11H22O2, Application of Methyl decanoate.

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