Esters-buliding-blocks

Sanchez, Carlos published the artcileProfiling of Organic Compounds in Bioethanol Samples of Different Nature and the Related Fractions, Computed Properties of 123-29-5, the main research area is bioethanol VOC gas chromatog mass spectrometry flame ionization detection.

Forty-one bioethanol real samples and related fractions, together with a biobutanol sample, have been analyzed with gas chromatog. coupled to either mass spectrometry (GC-MS) or flame ionization detection (GC-FID). Bioethanol with different water contents, samples originated from several sources of biomass, first- as well as second-generation specimens, distillation fractions, samples stocked in containers made of four different materials, and, finally, a biobutanol sample have been analyzed. The number of the compounds found through GC-MS has been 130, including alcs., aldehydes, ketones, esters, ethers, nitrogen compounds, organic acids, furane derivates as well as other species (e.g., limonene). Afterward, a quant. determination of major components of bioethanol has been carried out. The achieved results have revealed that, besides ethanol and, in some cases, water, species such as acetaldehyde, methanol, and higher alcs., as well as 1,1-diethoxyethane, may be present at concentrations above 500 mg L-1. While the source of bioethanol (nature of the raw material, ethanol generation, or water content) has a direct impact on its volatile organic compound (VOC) profile, the material of the container where the biofuel has been stored does not play a significant role. Finally, the results have demonstrated that, for a given production process, different distillation fractions contain unequal VOC profiles.

ACS Omega published new progress about Alcohols Role: OCU (Occurrence, Unclassified), OCCU (Occurrence). 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

Xu, Qi published the artcileVisible-Light-Induced Sulfur-Alkenylation of Alkenes, COA of Formula: C10H10O2, the main research area is dialkyl butenedithiol preparation diastereoselective regioselective; alkene ketene dithioacetal sulfur alkenylation trimethylphenylacridinium perchlorate photoredox catalyst.

A visible-light-induced intermol. sulfur-alkenylation of alkenes RCH=CR1R2 (R = H, Me, ethyl; R1 = H, Me, ethyl; R2 = Et, Ph, 2-naphthyl, acetyloxy, etc.; R1R2 = -(CH2)4-, -(CH2)5-; RR2 = -(CH2)3-, -(CH2)4-, -(CH2)2CH=CH-, etc.), 6,6-dimethyl-2-methylene-bicyclo[3.1.1]heptane including both activated and unactivated alkenes, mols. even induced by sunlight under ambient conditions is described. This sulfur-alkenylation reaction proceed in a highly regio- and stereospecific manner involving the visible-light-induced conversion of a ketene dithioacetal to the thiavinyl 1,3-dipole intermediate, followed by a formal [3+2] cycloaddition and C-S bond cleavage. Furthermore, it is also an efficient approach for the late-stage functionalization of natural products and complex mols., even being induced by sunlight under ambient conditions.

Organic Letters published new progress about [3+2] Cycloaddition reaction catalysts (stereo-, regioselective). 583-04-0 belongs to class esters-buliding-blocks, name is Allyl benzoate, and the molecular formula is C10H10O2, COA of Formula: C10H10O2.

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

Korzhikova-Vlakh, Evgenia G. published the artcileSome factors affecting pore size in the synthesis of rigid polymer monoliths: Theory and its applicability, Product Details of C16H30O2, the main research area is rigid polymer monolith affecting pore size synthesis.

Macroporous monoliths represent now widely used materials whose successful application strongly depends on their characteristics. Among those the average pore size is one of the key parameters. In this paper, we consider the applicability of theor. calculations for the selection of appropriate porogens to generate the materials with required average pore size. A set of macroporous poly(meth)acrylate monoliths was synthesized via thermo- and photo-initiated free radical polymerization and characterized in regards to their average pore size. Addnl., the difference in solubility parameters as well as Hansen’s solubility parameter distance between monomers and porogens were calculated for each polymerization mixture using Hildebrand’s and Hansen’s solubility theories. The theor. predications and exptl. data were compared and analyzed to establish the applicability of theor. calculations to previse average pore size for different systems. It was found that Hildebrand’s theory seems to be poorly appropriate as universal tool, while Hansen’s theor. approach explained better the efficiency of solvents as porogens. The application of oligomers and polymer solutions due to the increase of viscosity as well as the variation of crosslinker amount in the monomer system can be singled out as Hansen’s theory limitations at the prediction of the average pore size.

Journal of Applied Polymer Science published new progress about Polyoxyalkylenes Role: NUU (Other Use, Unclassified), USES (Uses). 142-90-5 belongs to class esters-buliding-blocks, name is Dodecyl 2-methylacrylate, and the molecular formula is C16H30O2, Product Details of C16H30O2.

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

Turhanen, Petri A. published the artcileGreen and Efficient Esterification Method Using Dried Dowex H+/NaI Approach, SDS of cas: 140-11-4, the main research area is green esterification carboxylic acid alc; regioselective esterification hydrogen cation exchange resin sodium iodide catalyst.

The usefulness of dried Dowex H+ cation-exchange resin with or without sodium iodide (NaI) as a catalyst system for different kinds of esterifications using carboxylic acids and alcs. as starting materials has been systematically investigated. The Dowex H+/NaI approach is very effective, generally high yielding, energy-efficient, and nontoxic, and the Dowex H+ resin is reusable. Since the whole procedure from start to product isolation is also very simple, these features make the method environmentally friendly. The method is regioselective, and its potential for separation of valuable carboxylic acids like resin acids from mixtures containing other kinds of carboxylic acids has been demonstrated. Examples for green and straightforward esterification of highly important natural amino acids are also presented.

ACS Omega published new progress about Carboxylic acids Role: RCT (Reactant), RACT (Reactant or Reagent). 140-11-4 belongs to class esters-buliding-blocks, name is Benzyl acetate, and the molecular formula is C9H10O2, SDS of cas: 140-11-4.

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

Takashina, Kazuki published the artcileSolid-phase total synthesis of Plusbacin A3, COA of Formula: C9H10O2, the main research area is Plusbacin A3 total solid phase synthesis antibacterial agent drug; Joullie Ugi three component diastereoselective.

The total synthesis of the depsipeptide natural product plusbacin A3 utilizing solid-phase peptide synthesis (SPPS) was disclosed. A 3-hydroxy-proline derivative compatible with Fmoc (Fmoc = 9-fluorenylmethoxycaarbonyl) SPPS was prepared by a diastereoselective Joullie-Ugi three-component reaction (JU-3CR)/hydrolysis sequence. After peptide elongation on the solid support, cleavage of the peptide from the resin, followed by macrolactamization and global deprotection, gave plusbacin A3.

Organic Letters published new progress about Allylic alcohols Role: RCT (Reactant), RACT (Reactant or Reagent). 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

Chaudhari, Moreshwar B. published the artcileSn-Catalyzed Criegee-Type Rearrangement of Peroxyoxindoles Enabled by Catalytic Dual Activation of Esters and Peroxides, Related Products of esters-buliding-blocks, the main research area is peroxy oxindole alkyl ester stannum catalyst Criegee type rearrangement; alkoxy benzoxazinone preparation green chem.

Sn-catalyzed mild protocol was reported for ring expansion of peroxyoxindoles to afford a series of substituted 2H-benzo[b][1,4]oxazin-3(4H)-one derivatives In this protocol, authors showed the in-situ conversion of tert-Bu peroxy compounds into peresters with the aid of external esters, which then underwent the ring-expansion process and the incipient carbocation was trapped with the alc. residue generated from the esters. The reaction was also demonstrated in a continuous flow process.

Journal of Organic Chemistry published new progress about Aliphatic esters Role: RCT (Reactant), RACT (Reactant or Reagent). 140-11-4 belongs to class esters-buliding-blocks, name is Benzyl acetate, and the molecular formula is C9H10O2, Related Products of esters-buliding-blocks.

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

Ruiz-Moyano, Santiago published the artcileSelection and application of antifungal VOCs-producing yeasts as biocontrol agents of grey mould in fruits, Recommanded Product: Benzyl acetate, the main research area is antifungal volatile compound yeast gray mold fruit; Antifungal volatile compounds; Botrytis cinerea; Cherry; Postharvest; Strawberry.

Rotting caused by gray mold (Botrytis cinerea) is a concerning disease for numerous crops both pre- and postharvest stages. Application of antagonistic yeasts is a promising strategy for controlling gray mold incidence which could mitigate undesirable consequences of using synthetic fungicides. In this work, a screening for detection of yeasts isolated from figs producers of antifungal volatile organic compounds (VOCs) were performed by confrontation in double dishes systems. Eleven out of 34 yeasts confronted reduced B. cinerea growth parameter in vitro. This reduction was correlated (p ≤ 0.050) with the production of 10 volatile compounds: two acids (acetic acid and octanoic acid), 7 esters (Et propionate, n-Pr acetate, Iso-Bu acetate, 2-methylbutyl acetate, furfuryl acetate, phenylmethyl acetate, 2-phenylethyl acetate) and one ketone (Heptan-2-one). In bases on in vitro assay, Hanseniaspora uvarum 793 was applied to in vivo assays with strawberries and cherries. The reduction of incidence of B. cinerea in strawberries at 7°C and 25°C was 54.9 and 72.1% after 6 and 3 days, resp. The reduction of incidence of B. cinerea in cherries at 7°C and 25°C was 48.9 and 45.6% after 5 and 4 days, resp. These results showed that VOCs produced by Hanseniaspora uvarum 793 are effective in the control of incidence of Botrytis cinerea in fruits, being a potential alternative to chem. fungicide.

Food Microbiology published new progress about Acyclic hydrocarbons Role: ANT (Analyte), ANST (Analytical Study). 140-11-4 belongs to class esters-buliding-blocks, name is Benzyl acetate, and the molecular formula is C9H10O2, Recommanded Product: Benzyl acetate.

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

Cai, Wen-Qiang published the artcileNi-Catalyzed Enantioselective Benzylation of Secondary Phosphine Oxide, HPLC of Formula: 140-11-4, the main research area is crystal structure mol tertiary phosphine oxide stereogenic preparation; nickel catalyzed stereoselective benzylation secondary phosphine oxide.

A nickel-catalyzed benzylic substitution of secondary phosphine oxide was described, affording the dialkylated P-stereogenic tertiary phosphine oxides with high to excellent enantioselectivities. The reaction was performed under mild conditions with com. available benzyl chlorides and bench stable secondary phosphine oxides, exhibiting broad functional group tolerance. It represented a practical example for the preparation of P-stereogenic phosphine compounds

Organic Letters published new progress about Aralkyl chlorides Role: RCT (Reactant), RACT (Reactant or Reagent). 140-11-4 belongs to class esters-buliding-blocks, name is Benzyl acetate, and the molecular formula is C9H10O2, HPLC of Formula: 140-11-4.

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

Pollack, Scott R. published the artcileMetal-free stereoselective synthesis of (E)- and (Z)-N-monosubstituted β-aminoacrylates via condensation reactions of carbamates, Formula: C7H13NO3, the main research area is carbamate alkoxyacrylate acid catalyst metal free diastereoselective condensation reaction; dialkoxypropanoate carbamate acid catalyst metal free diastereoselective condensation reaction; propynoate carbamate base catalyst diastereoselective condensation reaction; aminoacrylate preparation stereoselective metal free.

Two efficient, stereoselective methods for the preparation of (E)- or (Z)-β-aminoacrylates via acid- or base-promoted condensation reactions of carbamates are described. The base-promoted reaction is E-selective, while acid catalysis can, through the choice of solvent, selectively form E or Z. The acid-catalyzed E-selective process proceeds through a crystallization obviating the need for chromatog. purification

Journal of Organic Chemistry published new progress about Amino esters Role: SPN (Synthetic Preparation), PREP (Preparation). 120157-98-4 belongs to class esters-buliding-blocks, name is tert-Butyl acetylcarbamate, and the molecular formula is C7H13NO3, Formula: C7H13NO3.

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

Miyazawa, Toshifumi published the artcileResolution of non-protein amino acids via microbial protease-catalyzed ester hydrolysis: marked enhancement of enantioselectivity by the use of esters with longer alkyl chains and at low temperature, Category: esters-buliding-blocks, the main research area is enzymic resolution amino acid alkyl ester; enantioselectivity enhancement hydrolysis amino acid ester.

In the microbial protease-catalyzed hydrolysis of amino acid esters with the free α-amino group, the enantioselectivity can be enhanced greatly by employing esters with longer alkyl chains such as the iso-Bu ester instead of the conventional Me ester and by conducting the reaction at low temperature

Tetrahedron: Asymmetry published new progress about Amino acid esters Role: RCT (Reactant), RACT (Reactant or Reagent). 10047-10-6 belongs to class esters-buliding-blocks, name is Methyl 2-aminopentanoate hydrochloride, and the molecular formula is C6H14ClNO2, Category: esters-buliding-blocks.

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