Tag: M.W=150-200

Gaida, Meriem published the artcileModeling approaches for temperature-programmed gas chromatographic retention times under vacuum outlet conditions, Name: Methyl decanoate, the main research area is modeling approach temperature programmed gas chromatog retention time vacuum; Mass spectrometer detector; Method development and optimization; Retention equation; Thermodynamic modeling.

This contribution evaluates the performance of two predictive approaches in calculating temperature-programmed gas chromatog. retention times under vacuum outlet conditions. In the first approach, the predictions are performed according to a thermodn.-based model, while in the second approach the predictions are conducted by using the temperature-programmed retention time equation. These modeling approaches were evaluated on 47 test compounds belonging to different chem. classes, under different exptl. conditions, namely, two modes of gas flow regulation (i.e., constant inlet pressure and constant flow rate), and different temperature programs (i.e., 7°C/min, 5°C/min, and 3°C/min). Both modeling approaches gave satisfactory results and were able to accurately predict the elution profiles of the studied test compounds The thermodn.-based model provided more satisfying results under constant flow rate mode, with average modeling errors of 0.43%, 0.33%, and 0.15% across all the studied temperature programs. Nevertheless, under constant inlet pressure mode, lower modeling errors were achieved when using the temperature-programmed retention time equation, with average modeling errors of 0.18%, 0.18%, and 0.31% across the used temperature programs.

Journal of Chromatography A published new progress about Alkanes Role: ANT (Analyte), ANST (Analytical Study) (C7-C30). 110-42-9 belongs to class esters-buliding-blocks, name is Methyl decanoate, and the molecular formula is C11H22O2, Name: Methyl decanoate.

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

Hendrickson, James B. published the artcileNuclear synthons: mesyltriflone as an olefin polyanion equivalent, Application In Synthesis of 39495-82-4, the main research area is synthon mesyltriflone; regiochem mesyltriflone alkylation; Ramberg Baecklund mesyltriflone elimination; stereochem mesyltriflone elimination.

The title compound, CF3SO2CH2SO2Me, is a nuclear synthon capable first of multiple constructions (e.g., alkylations), and then of Ramberg-Baecklund elimination (to give substituted alkenes). The alkylations are clean and regiospecific, often amenable to one-pot operation, and in most cases the elimination is smooth. A variety of examples establish the scope of the method; the mechanism and stereochem. are discussed.

Journal of the American Chemical Society published new progress about Alkenes Role: SPN (Synthetic Preparation), PREP (Preparation). 39495-82-4 belongs to class esters-buliding-blocks, name is Ethyl 5-methylhex-5-enoate, and the molecular formula is C9H16O2, Application In Synthesis of 39495-82-4.

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

Koster, Jesper M. published the artcileActivation of primary and secondary benzylic and tertiary alkyl (sp3)C-F bonds inside a self-assembled molecular container, Formula: C9H16O2, the main research area is activation primary secondary benzylic carbon fluorine bond mol container; acid catalysis; elimination; molecular capsules; supramolecular catalysis; supramolecular chemistry.

Alkyl fluorides are generally regarded as chem. inert. However, several literature examples describe the activation of alkyl (sp3)C-F bonds via strong Bronsted or Lewis acids under harsh conditions. We here report that catalytic amounts of the self-assembled resorcinarene capsule are able to activate alkyl (sp3)C-F bonds under mild conditions (40 °C, no strong Bronsted or Lewis acid present). Kinetic measurements display a sigmoidal reaction progress after an initial induction period. Control experiments indicate that the presence of the supramol. capsule is required for an efficient reaction acceleration.

Frontiers in Chemistry (Lausanne, Switzerland) published new progress about Alkenes Role: SPN (Synthetic Preparation), PREP (Preparation). 39495-82-4 belongs to class esters-buliding-blocks, name is Ethyl 5-methylhex-5-enoate, and the molecular formula is C9H16O2, Formula: C9H16O2.

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

Shen, Tao published the artcileEfficient, solvent-free aminolysis of monoesters catalyzed by sodium, Category: esters-buliding-blocks, the main research area is ester sodium catalyst aminolysis; amide preparation.

An efficient, solvent-free procedure using sodium as catalyst for the aminolysis of monoesters was reported. A detailed comparison of catalysts between sodium and sodium amide was made. It was found that the fresh sodium amide by in-situ synthesis of sodium with ammonia was more active than the indirectly adding sodium amide. As compared to the previously reported approaches, the procedure given in this work was much faster and performed under mild conditions. Furthermore, this procedure was applied successfully for the aminolysis of other monoesters.

Youji Huaxue published new progress about Amides 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, Category: esters-buliding-blocks.

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

Abo-Ghalia, Mohamed H. published the artcileSynthesis and reactions of new chiral linear and macrocyclic tetra- and penta-peptide candidates, Application of Methyl 2-aminopentanoate hydrochloride, the main research area is cyclic peptide synthesis pyridine dicarboxylic acid; pyridine dicarbonyl dichloride amino acid coupling macrocylization hydrolysis hydrazinolysis.

A series of linear and macrocyclic pentapeptide derivatives have been prepared via the coupling of pyridine-2,6-dicarboxylic acid (I) (R1 = OH) or pyridine-2,6-dicarbonyl dichloride I (R1 = Cl) with appropriate amino acid Me esters. The coupling of I (R1 = OH) or I (R1 = Cl) with amino acid Me esters gave the corresponding pyridine dipeptide Me esters, which were hydrolyzed with sodium hydroxide to the corresponding acids. The latter acids. were coupled with other amino acid Me esters to afford the corresponding tetrapeptide esters, which were hydrolyzed with sodium hydroxide to the corresponding acids. Cyclization of tetrapeptide acids with L-lysine Me ester or with aliphatic diamide derivatives afforded the corresponding cyclic pentapeptide Me ester derivatives and cyclic tetrapeptide diamines, resp. Finally, hydrolysis with 1 N sodium hydroxide or hydrazinolysis with hydrazine hydrate of Me esters afforded the corresponding acids (II) [R1 = CH2CHMe2, R2 = CH2CH2Me, CH2Ph, CH2CHMe2: R1 = CH2Ph, R2 = CH2CHqMe, CH2PH; R3 = OH] and hydrazides II (R3 = NHNH2) , resp.

Zeitschrift fuer Naturforschung, B: A Journal of Chemical Sciences published new progress about Amino acids 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, Application of Methyl 2-aminopentanoate hydrochloride.

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

Abdulagatov, Ilmutdin M. published the artcileIsochoric heat capacity, phase transition and derived key thermodynamic properties of methyl decanoate, Formula: C11H22O2, the main research area is methyl decanoate isochoric heat capacity phase transition thermodn property.

In the present work single – and two-phase isochoric heat capacity (CV) and liquids-gas phase transition temperature (TS) and d. (ρS) of Me decanoate as component of biodiesel derived from coconut oil or babassu oil have been studied. The 15 liquid and vapor isochores between (152 and 834) kg·m-3 at temperatures from (300 to 463) K and at pressures up to 16 MPa were determined using high-temperature and high-pressure nearly constant-volume adiabatic calorimeter. For each exptl. isochores the measurements were conducted in the two-phase region in the immediate vicinity of the phase-transition temperatures (TS) to precisely determine the phase boundary d., one-phase and two-phase isochoric heat capacities (ρS,CV1, and CV2) using isochoric heat -capacity discontinuity behavior technique. For ten liquid isochores, the TSwas exptl. determined usingCVdiscontinuity method (irregular behavior of CV). For vapor (152.09 and 204.55) kg·m-3 and near-critical (235.13 and 300.83) kg·m-3 isochores we have never reached isochoric heat-capacity discontinuity temperatures TSdue to thermal decomposition of the Me decanoate at high temperatures (above 473 K). The measured CV2 as a function of sp. volume (V) along the various isotherms (below 473 K) were used to accurately estimate the values of the second temperature derivatives of chem. potential and vapor-pressure using theor. based Yang-Yang relation. The contributions of the vapor-pressure and the chem. potential to the measured total two-phase CV2 of Me decanoate were estimated The measured CV2ρS, and TS were used for determination many key thermodn. properties of Me decanoate along the saturation curve as well as the critical property data (TC=669.5 ± 5 K andρC = 287 ± 5 kg·m-3).

Fuel published new progress about Babassu oil Role: NUU (Other Use, Unclassified), USES (Uses). 110-42-9 belongs to class esters-buliding-blocks, name is Methyl decanoate, and the molecular formula is C11H22O2, Formula: C11H22O2.

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

Balachandran, S. published the artcileEnhancement of aqueous solubility and extraction of lauric acid using hydrotropes and its interaction studies by COSMO-RS model, Related Products of esters-buliding-blocks, the main research area is enhancement aqueous solubility extraction lauric acid hydrotrope.

In this study, conductor like screening model for real solvents was used to analyze the ability of hydrogen bond donor, hydrogen bond acceptor and electron affinity of all the studied species such as water, lauric acid (LA), sodium benzoate (SB), sodium salicylate (SS), nicotinamide (NI), and urea (UA). Further, the different hydrotropes solutions were prepared with different concentrations (0-3.0 mol/L) in order to analyze the solubility of lauric acid at different temperatures (303-313 K). Subsequently, hydrotropes based extraction of lauric acid from cold press coconut oil (CPCO) and com.-grade edible coconut oil (CGECO) was conducted at 313 K and 0.1 MPa. GC-MS anal. has been carried out on cold press coconut oil, com. grade edible coconut oil and hydrotropically extracted samples to characterize the different fatty acid compounds present in it. It was observed that the sodium benzoate hydrotrope solution extracted samples has lauric acid as a significant component in the GC-MS spectra when compared to the extracted samples of sodium salicylate hydrotrope solution

Journal of Dispersion Science and Technology published new progress about Coconut oil Role: NUU (Other Use, Unclassified), USES (Uses). 110-42-9 belongs to class esters-buliding-blocks, name is Methyl decanoate, and the molecular formula is C11H22O2, Related Products of esters-buliding-blocks.

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

Balachandran, S. published the artcileEnhancement of aqueous solubility and extraction of lauric acid using hydrotropes and its interaction studies by COSMO-RS model, Category: esters-buliding-blocks, the main research area is enhancement aqueous solubility extraction lauric acid hydrotrope.

In this study, conductor like screening model for real solvents was used to analyze the ability of hydrogen bond donor, hydrogen bond acceptor and electron affinity of all the studied species such as water, lauric acid (LA), sodium benzoate (SB), sodium salicylate (SS), nicotinamide (NI), and urea (UA). Further, the different hydrotropes solutions were prepared with different concentrations (0-3.0 mol/L) in order to analyze the solubility of lauric acid at different temperatures (303-313 K). Subsequently, hydrotropes based extraction of lauric acid from cold press coconut oil (CPCO) and com.-grade edible coconut oil (CGECO) was conducted at 313 K and 0.1 MPa. GC-MS anal. has been carried out on cold press coconut oil, com. grade edible coconut oil and hydrotropically extracted samples to characterize the different fatty acid compounds present in it. It was observed that the sodium benzoate hydrotrope solution extracted samples has lauric acid as a significant component in the GC-MS spectra when compared to the extracted samples of sodium salicylate hydrotrope solution

Journal of Dispersion Science and Technology published new progress about Coconut oil Role: NUU (Other Use, Unclassified), USES (Uses). 111-11-5 belongs to class esters-buliding-blocks, name is Methyl octanoate, and the molecular formula is C9H18O2, Category: esters-buliding-blocks.

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

Wu, Liqiang published the artcileSilica sulfuric acid: a versatile and reusable heterogeneous catalyst for the synthesis of N-acyl carbamates and oxazolidinones under solvent-free conditions, Category: esters-buliding-blocks, the main research area is silica sulfuric acid versatile reusable heterogeneous catalyst; synthesis acyl carbamate oxazolidinone solvent free condition.

Silica sulfuric acid catalyzes efficiently the reaction of carbamates and oxazolidinones with anhydrides under solvent-free conditions. All the reactions were done at room temperature and the N-acyl carbamates and oxazolidinones were obtained with high yields and purity via an easy work-up procedure. This method is attractive and is in a close agreement with green chem.

Bulletin of the Chemical Society of Ethiopia published new progress about Anhydrides Role: RCT (Reactant), RACT (Reactant or Reagent). 120157-98-4 belongs to class esters-buliding-blocks, name is tert-Butyl acetylcarbamate, and the molecular formula is C7H13NO3, Category: esters-buliding-blocks.

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

Nakajima, Takumi published the artcileProduction of Alkyl Aryl Sulfides from Aromatic Disulfides and Alkyl Carboxylates via a Disilathiane-Disulfide Interchange Reaction, COA of Formula: C10H10O2, the main research area is alkyl aryl sulfide preparation; aromatic disulfide alkyl carboxylate interchange; alkyl carboxylate; carbon-sulfur bond formation; disilathiane; disulfide; sulfur-sulfur bond cleavage.

The results of this study show that disilathiane was an effective mediator in the synthesis of alkyl aryl sulfides RSR1 [R = Me, Et, Bn, etc.; R1 = Ph, 4-MeC6H4, 2-naphthyl, etc.] with disulfides and alkyl carboxylates. Mechanistic studies suggested that disilathiane promotes cleavage of the sulfur-sulfur bond of disulfides to generate thiosilane as a key intermediate. Diselenides were also applicable to this transformation to produce the corresponding selenides.

Chemistry – An Asian Journal published new progress about Disulfides Role: RCT (Reactant), RACT (Reactant or Reagent). 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