Month: November 2022

On September 1, 2021, Mulero, A.; Cachadina, I.; Vegas, A. published an article.Related Products of 123-25-1 The title of the article was Recommended Correlations for the Surface Tension of 80 Esters. And the article contained the following:

Surface tension values for 80 esters have been compiled from databases, books, and papers in the literature. The data have been carefully screened and selected, and the final dataset for each fluid has been fitted as a function of the temperature by using the Guggenheim-Katayama model, which requires two or four adjustable coefficients for each fluid. As a result, recommended correlations are proposed for each of the 80 esters, providing mean absolute deviations below 0.55 mN/m, mean absolute percentage deviations below 2.2%, and percentage deviations below 10% except for 3 data out of 1846 selected. These correlations are added to the collection of those previously proposed for different kinds of fluids, including common fluids, alcs., refrigerants, organic acids, and n-alkanes. (c) 2021 American Institute of Physics. The experimental process involved the reaction of Diethyl succinate(cas: 123-25-1).Related Products of 123-25-1

The Article related to surface tension ester fluid, Surface Chemistry and Colloids: Liquid-Gas Systems and other aspects.Related Products of 123-25-1

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

On January 15, 2019, Solunov, Hristo Aleksandrov published an article.Electric Literature of 118-55-8 The title of the article was Relations between the sub-molecula and the cooperative scales in the molecular dynamics of the glass-forming liquids. And the article contained the following:

The mols. of the supercooled liquids in the cooperative mol. dynamics are partitioning to specific dynamic units, known as “beads”. The beads have been defined as the smallest units, forming the heat capacity of the supercooled liquids The beads appear as a sub-mol. scale in the dynamics of the glass-forming liquids In the Adam-Gibbs theory the number of mols., rearranging simultaneously, has been defined as the size of the cooperative rearranging region and these regions form the second larger mol. scale in mol. dynamics. Due to a noticeable discrepancy in estimating the number of beads in the mols. by the empirical rules as well as by theor. models the relations between these two scales are not well known. Recently, a new thermodn. method for estimating the number of the beads in the mols. and a rule for the examination of their temperature dependence have been suggested. By these methods 48 low-mol. supercooled liquids are investigated and the relations between these two mol. scales and the structure of the mols. have been found. The estimated number of configuration beads is compared with the number of the structural units (the chem. groups, the ions and the atoms), with the assigned number by the empirical rules and with the ones calculated, based on a Lennar-Jones model of the random first order transition theory. A constant and two kinds of temperature dependence of the number of the beads in the mols. of different liquids have been revealed. A mol. basis, forming the fragility of the supercooled liquids, has been found. From the results obtained, the investigated liquids are classified in several groups following the logical line in the formation of the beads. The experimental process involved the reaction of Phenyl Salicylate(cas: 118-55-8).Electric Literature of 118-55-8

The Article related to glass forming supercooled liquid mol dynamics, General Physical Chemistry: Macroscopic Properties and other aspects.Electric Literature of 118-55-8

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

Fernandez, Josefa; Assael, Marc J.; Enick, Robert M.; Trusler, J. P. Martin published an article in 2019, the title of the article was International Standard for viscosity at temperatures up to 473 K and pressures below 200 MPa (IUPAC Technical Report).Related Products of 3319-31-1 And the article contains the following content:

This paper presents the results of an investigation into possible liquid viscosity standards to meet an industrial requirement for a liquid with a nominal viscosity of 20 mPa s at a temperature of 473 K and pressure of 200 MPa with a relative expanded uncertainty of less than 5%. There are no com. available certified viscosity reference liquids that meet this requirement. Four candidate fluids were examined: squalane, Krytox GPL102, tris(2-ethylhexyl) trimellitate (TOTM), and dipentaerythritol hexa(3,5,5-trimethylhexanoate) (DiPEiC9). Although none of these fluids satisfies all of the criteria, two fluids were identified as being suitable as International Standards for viscosity at temperatures up to 473 K and pressures below 200 MPa. These fluids are squalane and tris(2-ethylhexyl) trimellitate (TOTM), which at T=473.15 K and p=200 MPa present viscosity values of 5 mPa s and 10 mPa s, resp. The experimental process involved the reaction of Tris(2-ethylhexyl) benzene-1,2,4-tricarboxylate(cas: 3319-31-1).Related Products of 3319-31-1

The Article related to viscosity temperature pressure international standard, General Physical Chemistry: Macroscopic Properties and other aspects.Related Products of 3319-31-1

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

On June 1, 2022, Mulero, A.; Cachadina, I.; Vegas, A. published an article.Quality Control of Tris(2-ethylhexyl) benzene-1,2,4-tricarboxylate The title of the article was Recommended Correlations for the Surface Tension of Aromatic, Polyfunctional, and Glyceride Esters. And the article contained the following:

Surface tension values for 79 esters, including aromatics, polyfunctional, and glycerides, have been compiled from databases, books, and papers in the literature. The data have been carefully screened, and finally, 1517 values were selected. Each fluid dataset has been fitted with the Guggenheim-Katayama correlation with two or four adjustable parameters. Recommended correlations are proposed for each ester, providing mean absolute deviations below 0.50 mN/m for 77 of them, mean absolute percentage deviations below 1.7% for 76 of them, and percentage deviations below 10%, except for four data out of the 59 selected for tricaprylin. The highest deviations found are due to the disagreement between the data obtained from different sources and not to an inadequate math. form of the correlation model. These correlations are added to the collection of those previously proposed for different fluids, including common substances, alcs., refrigerants, organic acids, n-alkanes, and 80 other esters. (c) 2022 American Institute of Physics. The experimental process involved the reaction of Tris(2-ethylhexyl) benzene-1,2,4-tricarboxylate(cas: 3319-31-1).Quality Control of Tris(2-ethylhexyl) benzene-1,2,4-tricarboxylate

The Article related to aromatic polyfunctional glyceride ester surface tension correlation, Surface Chemistry and Colloids: Liquid-Gas Systems and other aspects.Quality Control of Tris(2-ethylhexyl) benzene-1,2,4-tricarboxylate

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

On August 14, 2013, Li, Tao; Kozlowski, Mark T.; Doud, Evan A.; Blakely, Maike N.; Rosi, Nathaniel L. published an article.Recommanded Product: 1312703-30-2 The title of the article was Stepwise ligand exchange for preparation of family of mesoporous MOFs. And the article contained the following:

A stepwise ligand exchange strategy is utilized to prepare a series of isoreticular bio-MOF-100 analogs. Specifically, in situ ligand exchange with progressively longer dicarboxylate linkers is performed on single crystalline starting materials to synthesize products with progressively larger mesoporous cavities. The new members of this series of materials, bio-MOFs 101-103, each exhibit permanent mesoporosity and pore sizes ranging from ∼2.1-2.9 nm and surface areas ranging from 2704 to 4410 m2/g. The pore volume for bio-MOF 101 is 2.83 cc/g. Bio-MOF-102 and 103 have pore volumes of 4.36 and 4.13 cc/g, resp. Collectively, these data establish this unique family of MOFs as one of the most porous reported to date. The experimental process involved the reaction of Dimethyl 2′-amino-[1,1′:4′,1”-terphenyl]-4,4”-dicarboxylate(cas: 1312703-30-2).Recommanded Product: 1312703-30-2

The Article related to ligand exchange mesoporous metal organic framework dicarboxylate linker, Surface Chemistry and Colloids: Liquid-Gas Systems and other aspects.Recommanded Product: 1312703-30-2

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

On September 29, 2005, Stead, Darren; O’Brien, Peter; Sanderson, Adam J. published an article.Recommanded Product: tert-Butyl 7-benzyl-9-oxo-3,7-diazabicyclo[3.3.1]nonane-3-carboxylate The title of the article was Concise Synthesis of (±)-Cytisine via Lithiation of N-Boc-bispidine. And the article contained the following:

(±)-Cytisine (I) has been synthesized in 19% overall yield via a six-step approach from com. available materials. Key features of this new strategy are as follows: (i) initial construction of the bispidine core, (ii) lithiation-transmetalation-allylation of an N-Boc-bispidine, and (iii) a Pd/C-mediated dihydropyridone oxidation-N-debenzylation process. The experimental process involved the reaction of tert-Butyl 7-benzyl-9-oxo-3,7-diazabicyclo[3.3.1]nonane-3-carboxylate(cas: 227940-70-7).Recommanded Product: tert-Butyl 7-benzyl-9-oxo-3,7-diazabicyclo[3.3.1]nonane-3-carboxylate

The Article related to cytisine synthesis lithiation transmetalation allylation stereoselective, Alkaloids: Alkaloids Containing Two Nitrogen Atoms and other aspects.Recommanded Product: tert-Butyl 7-benzyl-9-oxo-3,7-diazabicyclo[3.3.1]nonane-3-carboxylate

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

On May 11, 2017, Bazile, Jean-Patrick; Nasri, Djamel; Daridon, Jean-Luc published an article.Synthetic Route of 3319-31-1 The title of the article was Speed of Sound, Density, and Derivative Properties of Tris(2-ethylhexyl) Trimellitate under High Pressure. And the article contained the following:

Speed of sound measurements were carried out in liquid tris(2-ethylhexyl) trimellitate (TOTM) at pressures up to 200 MPa along isotherms ranging from (293.15 to 373.15) K in order to report data of d. and its derivatives The measurements were performed with a pulse echo technique working at 3 MHz. Addnl. d. and heat capacity measurements were carried out at atm. pressure in order to initiate the estimation procedure of volumetric properties from speed of sound integration. Results were compared with d. measurements performed with a U-tube densimeter at pressures up to 140 MPa on the same sample. Finally, an equation that correlates d. and its derivatives within their estimated uncertainties is given. The experimental process involved the reaction of Tris(2-ethylhexyl) benzene-1,2,4-tricarboxylate(cas: 3319-31-1).Synthetic Route of 3319-31-1

The Article related to speed sound velocity density heat capacity ethylhexyl trimellitate pressure, General Physical Chemistry: Macroscopic Properties and other aspects.Synthetic Route of 3319-31-1

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

Wang, Liping; Zhang, Yapeng; Xu, Zhihong; Li, Jing; Zhu, Weiming published an article in 2022, the title of the article was Total synthesis of the indolocarbazole alkaloid ZHD-0501 and its seven isomers.HPLC of Formula: 2873-29-2 And the article contains the following content:

An indolocarbazole alkaloid, ZHD-0501, and its seven stereoisomers were totally synthesized from D/L-glucose and 2,3-dibromomaleimide in 22 step reactions, and the absolute configuration of ZHD-0501 was confirmed for the first time. Indolocarbazole alkaloid, ZHD-0501, and its seven stereoisomers showed significant inhibition against PKC α/β and the proliferation of A549, HeLa, K562 and BEL-7402 tumor cell lines. The experimental process involved the reaction of (2R,3S,4R)-2-(Acetoxymethyl)-3,4-dihydro-2H-pyran-3,4-diyl diacetate(cas: 2873-29-2).HPLC of Formula: 2873-29-2

The Article related to indolocarbazole alkaloid zhd 0501 preparation antitumor protein kinase inhibitor, Alkaloids: Alkaloids Containing Two Nitrogen Atoms and other aspects.HPLC of Formula: 2873-29-2

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

On September 14, 2017, Wakeham, William A.; Assael, Marc J.; Avelino, Helena M. N. T.; Bair, Scott; Baled, Hseen O.; Bamgbade, Babatunde A.; Bazile, Jean-Patrick; Caetano, Fernando J. P.; Comunas, Maria J. P.; Daridon, Jean-Luc; Diogo, Joao C. F.; Enick, Robert M.; Fareleira, Joao M. N. A.; Fernandez, Josefa; Oliveira, M. Conceicao; Santos, Tania V. M.; Tsolakidou, Chrysi M. published an article.Synthetic Route of 3319-31-1 The title of the article was In Pursuit of a High-Temperature, High-Pressure, High-Viscosity Standard: The Case of Tris(2-ethylhexyl) Trimellitate. And the article contained the following:

This paper presents a reference correlation for the viscosity of tris(2-ethylhexyl) trimellitate designed to serve in industrial applications for the calibration of viscometers at elevated temperatures and pressures such as those encountered in the exploration of oil reservoirs and in lubrication. Tris(2-ethylhexyl) trimellitate has been examined with respect to the criteria necessary for an industrial standard reference material such as toxicity, thermal stability, and variability among manufactured lots. The viscosity correlation has been based upon all of the data collected in a multinational project and is supported by careful measurements and anal. of all the supporting thermophys. property data that are needed to apply the standard for calibration to a wide variety of viscometers. The standard reference viscosity data cover temperatures from 303 to 473 K, pressures from 0.1 to 200 MPa, and viscosities from approx. 1.6 to 755 mPa. The uncertainty in the data provided is of the order of 3.2% at 95% confidence level, which is thought to be adequate for most industrial applications. The experimental process involved the reaction of Tris(2-ethylhexyl) benzene-1,2,4-tricarboxylate(cas: 3319-31-1).Synthetic Route of 3319-31-1

The Article related to ethylhexyl trimellitate reference compound viscosity elevated temperature pressure industry, General Physical Chemistry: Macroscopic Properties and other aspects.Synthetic Route of 3319-31-1

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

On January 12, 2022, Zhang, Jiajun; Paladugu, Srinivas R.; Gillard, Rachel M.; Sarkar, Anindya; Boger, Dale L. published an article.Quality Control of Methyl 2-cyclopentanonecarboxylate The title of the article was Tris(4-bromophenyl)aminium Hexachloroantimonate-Mediated Intermolecular C(sp2)-C(sp3) Free Radical Coupling of Vindoline with β-Ketoesters and Related Compounds. And the article contained the following:

A powerful tris(4-bromophenyl)aminium hexachloroantimonate (BAHA) mediated regioselective intermol. coupling reaction of vindoline with a wide range of substrates that include β-ketoesters, β-diketones, β-ketoaldehydes, β-ketonitriles, β-ketolactones, β-ketolactams, β-cyanoesters, and malononitriles is detailed. The BAHA-promoted intermol. sp3/sp2 coupling, representing a special class of selective C-H functionalization reactions with direct carbon-carbon bond formation, proceeds with generation of a quaternary center bound to the aryl C15 center of vindoline capable of accommodating of the vinblastine C16′ Me ester and functionalized for subsequent divergent heterocycle introduction. A comprehensive examination of the reaction scope, optimization of subtle reaction parameters, and key insights into the reaction mechanism are described. Contrary to what might be prevailing expectations, studies suggest the plausible mechanism entails initial single-electron oxidation of the substrate enolate, not vindoline, and subsequent regiospecific addition of the resulting electrophilic radical to vindoline. As such and beyond the new arylation reaction with vindoline, the studies define a host of new, previously unrecognized, applications of BAHA and related triarylaminium radical cations that arises from their ability to generate stabilized electrophilic radicals from β-ketoesters and related substrates under nonreducing and metal-free conditions. Those exemplified herein include mediating stabilized enolate free radical arylation, dimerization, allylation, alkene addition, and α-oxidation reactions. The experimental process involved the reaction of Methyl 2-cyclopentanonecarboxylate(cas: 10472-24-9).Quality Control of Methyl 2-cyclopentanonecarboxylate

The Article related to vindoline ketoester tris bromophenylaminium hexachloroantimonate regioselective radical coupling, Alkaloids: Alkaloids Containing Two Nitrogen Atoms and other aspects.Quality Control of Methyl 2-cyclopentanonecarboxylate

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