Category: esters-buliding-blocks

Thermotropic phase behavior of model membranes composed of phosphatidylcholines containing methyl iso-branched fatty acids. 1. Differential scanning calorimetric studies was written by Lewis, Ruthven N. A. H.;McElhaney, Ronald N.. And the article was included in Biochemistry in 1985.Reference of 3903-40-0 This article mentions the following:

The thermotropic phase behavior of aqueous dispersions of phosphatidylcholines (PCs) containing 1 of a series of Me iso-branched fatty acyl chains was studied by differential scanning calorimetry. These compounds exhibited a complex phase behavior on heating which included 2 endothermic events, a gel/gel transition, involving a mol. packing rearrangement between 2 gel-state forms, and a gel/liquid-crystalline phase transition, involving the melting of the hydrocarbon chains. The gel/liquid-crystalline transition was a relatively fast, highly cooperative process which exhibited a lower transition temperature and enthalpy than did the chain-melting transitions of saturated straight-chain PCs of similar acyl chain length. In addition, the gel/liquid-crystalline phase transition temperature was relatively insensitive to the composition of the aqueous phase. In contrast, the gel/gel transition is a slow process of lower cooperativity than the gel-liquid-crystalline phase transition and is sensitive to the composition of the bulk aqueous phase. The gel/gel transitions of the Me iso-branched PCs had very different thermodn. properties and depended in a different way on hydrocarbon chain length than did either the subtransitions or the pretransitions observed with linear saturated PCs. The gel/gel and gel/liquid-crystalline transitions were apparently concomitant for the shorter-chain iso-branched PCs, but diverged on the temperature scale with increasing chain length, with a pronounced odd/even alternation of the characteristic temperatures of the gel/gel transition. The observations were be rationalized by assuming that the stable conformation characteristic of these lipids at temperatures below the gel/gel transition temperature and their conformation in the liquid-crystalline state are such that direct interconversions between the 2 states is improbable and that such interconversions must proceed via an intermediate state or states. In the experiment, the researchers used many compounds, for example, 12-Methoxy-12-oxododecanoic acid (cas: 3903-40-0Reference of 3903-40-0).

12-Methoxy-12-oxododecanoic acid (cas: 3903-40-0) belongs to esters. Carboxylic acid esters of low molecular weight are colourless, volatile liquids with pleasant odours, slightly soluble in water. Esters contain a carbonyl center, which gives rise to 120° C–C–O and O–C–O angles. Unlike amides, esters are structurally flexible functional groups because rotation about the C–O–C bonds has a low barrier. Their flexibility and low polarity is manifested in their physical properties; they tend to be less rigid (lower melting point) and more volatile (lower boiling point) than the corresponding amides. Reference of 3903-40-0

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

Triazole Ureas Act as Diacylglycerol Lipase Inhibitors and Prevent Fasting-Induced Refeeding was written by Deng, Hui;Kooijman, Sander;van den Nieuwendijk, Adrianus M. C. H.;Ogasawara, Daisuke;van der Wel, Tom;van Dalen, Floris;Baggelaar, Marc P.;Janssen, Freek J.;van den Berg, Richard J. B. H. N.;den Dulk, Hans;Cravatt, Benjamin F.;Overkleeft, Herman S.;Rensen, Patrick C. N.;van der Stelt, Mario. And the article was included in Journal of Medicinal Chemistry in 2017.Product Details of 87694-53-9 This article mentions the following:

Triazole ureas constitute a versatile class of irreversible inhibitors that target serine hydrolases in both cells and animal models. We have previously reported that triazole ureas can act as selective and CNS-active inhibitors for diacylglycerol lipases (DAGLs), enzymes responsible for the biosynthesis of 2-arachidonoyl glycerol (2-AG) that activates cannabinoid CB₁ receptor. Here, we report the enantio- and diastereoselective synthesis and structure-activity relationship studies. We found that 2,4-substituted triazole ureas with a biphenylmethanol group provided the most optimal scaffold. Introduction of a chiral ether substituent on the 5-position of the piperidine ring provided ultrapotent inhibitor I (DH376) with picomolar activity. Compound I temporarily reduces fasting-induced refeeding of mice, thereby emulating the effect of cannabinoid CB₁-receptor inverse agonists. This was mirrored by II (DO34) but also by the neg. control compound III (DO53) (which does not inhibit DAGL), which indicates the triazole ureas may affect the energy balance in mice through multiple mol. targets. In the experiment, the researchers used many compounds, for example, (S)-tert-Butyl (1-(methoxy(methyl)amino)-1-oxo-3-phenylpropan-2-yl)carbamate (cas: 87694-53-9Product Details of 87694-53-9).

(S)-tert-Butyl (1-(methoxy(methyl)amino)-1-oxo-3-phenylpropan-2-yl)carbamate (cas: 87694-53-9) belongs to esters. Volatile esters with characteristic odours are used in synthetic flavours, perfumes, and cosmetics. Certain volatile esters are used as solvents for lacquers, paints, and varnishes. Many esters have the potential for conformational isomerism, but they tend to adopt an s-cis (or Z) conformation rather than the s-trans (or E) alternative, due to a combination of hyperconjugation and dipole minimization effects. The preference for the Z conformation is influenced by the nature of the substituents and solvent, if present. Lactones with small rings are restricted to the s-trans (i.e. E) conformation due to their cyclic structure.Product Details of 87694-53-9

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

4-(4-Fluorophenyl)-2-methyl-3-(1-oxy-4-pyridyl)isoxazol-5(2H)-one was written by Margutti, Simona;Schollmeyer, Dieter;Laufer, Stefan. And the article was included in Acta Crystallographica, Section E: Structure Reports Online in 2008.Quality Control of Ethyl 2-(4-fluorophenyl)acetate This article mentions the following:

The crystal structure of 4-(4-fluorophenyl)-2-methyl-3-(1-oxy-4-pyridyl)isoxazol-5(2H)-one, C₁₅H₁₁FN₂O₃, was determined as part of a study on the biol. activity of isoxazolone derivatives as p38 mitogen-activated protein kinase (MAPK) inhibitors. The dihedral angles between rings are isoxazole/benzene = 55.0(3)°, isoxazole/pyridine = 33.8(2)° and benzene/pyridine = 58.1(2)°. Crystallog. data are given. In the experiment, the researchers used many compounds, for example, Ethyl 2-(4-fluorophenyl)acetate (cas: 587-88-2Quality Control of Ethyl 2-(4-fluorophenyl)acetate).

Ethyl 2-(4-fluorophenyl)acetate (cas: 587-88-2) belongs to esters. Esters perform as high-grade solvents for a broad array of plastics, plasticizers, resins, and lacquers, and are one of the largest classes of synthetic lubricants on the commercial market. Acyl chlorides and acid anhydrides alcoholysis is another way to produce esters. Acyl chlorides and acid anhydrides react with alcohols to produce esters. Anydrous conditions are recommended since both acyl chlorides and acid anhydrides react with water.Quality Control of Ethyl 2-(4-fluorophenyl)acetate

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

Inhibition of major groove DNA binding bZIP proteins by positive patch polyamides was written by Bremer, R. E.;Wurtz, N. R.;Szewczyk, J. W.;Dervan, P. B.. And the article was included in Bioorganic & Medicinal Chemistry in 2001.SDS of cas: 5930-92-7 This article mentions the following:

Cell permeable synthetic ligands that bind to predetermined DNA sequences offer a chem. approach to gene regulation, provided inhibition of a broad range of DNA transcription factors can be achieved. DNA minor groove binding polyamides containing aminoalkyl substituents at the N-1 of a single pyrrole residue display inhibitory effects for a bZIP protein which binds exclusively in the DNA major groove. For major groove protein inhibition, specific protein-DNA contacts along the phosphate backbone were targeted with the pos. charged dimethylamino substituent on the backbone of a minor groove binding polyamide hairpin. Remarkably, these polyamides bind DNA with enhanced affinity and uncompromised specificity when compared to polyamides with the aminoalkyl moiety at the C-terminus. By adding bZIP transcription factors to the class of protein-DNA complexes that can be disrupted by minor groove binding ligands, these results may increase the functional utility of polyamides as regulators of gene expression. In the experiment, the researchers used many compounds, for example, Ethyl 4-nitro-1H-pyrrole-2-carboxylate (cas: 5930-92-7SDS of cas: 5930-92-7).

Ethyl 4-nitro-1H-pyrrole-2-carboxylate (cas: 5930-92-7) belongs to esters. Esters perform as high-grade solvents for a broad array of plastics, plasticizers, resins, and lacquers, and are one of the largest classes of synthetic lubricants on the commercial market. Liquid esters of low volatility serve as softening agents for resins and plastics. Esters also include many industrially important polymers. Polymethyl methacrylate is a glass substitute sold under the names Lucite and Plexiglas; polyethylene terephthalate is used as a film (Mylar) and as textile fibres sold as Terylene, Fortrel, and Dacron.SDS of cas: 5930-92-7

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

Optimization of a new polymeric chromium (III) membrane electrode based on methyl violet by using experimental design was written by Kazemi, Sayed Yahya;Hamidi, Akram sadat;Asanjarani, Neda;Zolgharnein, Javad. And the article was included in Talanta in 2010.Application In Synthesis of Dimethyl decanedioate This article mentions the following:

Placket-Burman and Box-Behnken designs were applied as exptl. design strategies to screen and optimize the influence of membrane ingredients on the electrode performance. A new poly(vinyl chloride) membrane sensor for Cr(III) based on Methyl violet as an ionophore was planned. The major variables to find a model for achieving the best Nernstian slope as response were: PVC, plasticizers, Methyl violet, KpClTPB, pH, conditioning time and internal solution concentration Placket-Burman design was used to screen the main factors and Box-Behnken response surface was led to find a model for optimizing the response. The optimized membrane electrode shows a Nernstian slope for chromium (III) ions over a wide linear range from 1.99 × 10^-6 to 3.16 × 10^-2 mol L^-1 and a slope of 19.5 ± 0.1 mV decade^-1 of activity. It would be successfully applied in the pH range from 3.5 to 6.5 with detection limit of 1.77 × 10^-6 mol L^-1 (0.092 mg L^-1). The response time of the sensor is ∼8 s and the membrane can be used for >6 wk without any deviation. The relative standard deviations (relative standard deviation) for six replicate the measurements of 1.0 × 10^-4 and 1.0 × 10^-3 mol L^-1 of Cr(III) were 3.2 and 3%, resp. The electrode revealed comparatively good selectivity with respect to many cations including alkali earth, transition and heavy metal ions. The electrode was successfully used as an indicator in the potentiometric titration of Cr(III) with EDTA and was also applied to the direct determination chromium (III) content of spiked water and soil samples. In the experiment, the researchers used many compounds, for example, Dimethyl decanedioate (cas: 106-79-6Application In Synthesis of Dimethyl decanedioate).

Dimethyl decanedioate (cas: 106-79-6) belongs to esters. Carboxylic acid esters of low molecular weight are colourless, volatile liquids with pleasant odours, slightly soluble in water. Acyl chlorides and acid anhydrides alcoholysis is another way to produce esters. Acyl chlorides and acid anhydrides react with alcohols to produce esters. Anydrous conditions are recommended since both acyl chlorides and acid anhydrides react with water.Application In Synthesis of Dimethyl decanedioate

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

A 11-Steps Total Synthesis of Magellanine through a Gold(I)-Catalyzed Dehydro Diels-Alder Reaction was written by McGee, Philippe;Betournay, Genevieve;Barabe, Francis;Barriault, Louis. And the article was included in Angewandte Chemie, International Edition in 2017.Related Products of 17920-23-9 This article mentions the following:

We have developed an innovative strategy for the formation of angular carbocycles via a gold(I)-catalyzed dehydro Diels-Alder reaction. This transformation provides rapid access to a variety of complex angular cores in excellent diastereoselectivities and high yields. The usefulness of this Au(I)-catalyzed cycloaddition was further demonstrated by accomplishing a 11-steps total synthesis of (±)-magellanine. In the experiment, the researchers used many compounds, for example, Diethyl 2-(prop-2-yn-1-yl)malonate (cas: 17920-23-9Related Products of 17920-23-9).

Diethyl 2-(prop-2-yn-1-yl)malonate (cas: 17920-23-9) belongs to esters. Esters are widespread in nature and are widely used in industry. In nature, fats are in general triesters derived from glycerol and fatty acids. Esters are responsible for the aroma of many fruits. Because of their lack of hydrogen-bond-donating ability, esters do not self-associate. Consequently, esters are more volatile than carboxylic acids of similar molecular weight.Related Products of 17920-23-9

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

Isoxazolone Based Inhibitors of p38 MAP Kinases was written by Laufer, Stefan A.;Margutti, Simona. And the article was included in Journal of Medicinal Chemistry in 2008.Category: esters-buliding-blocks This article mentions the following:

SAR of N-alkylated isoxazolones as p38 MAP kinase inhibitors was realized. The data herein show the possibility of transferring the SAR study and evaluation from N-1-substituted imidazole to isoxazolones. Optimization of substituent was realized. In the experiment, the researchers used many compounds, for example, Ethyl 2-(4-fluorophenyl)acetate (cas: 587-88-2Category: esters-buliding-blocks).

Ethyl 2-(4-fluorophenyl)acetate (cas: 587-88-2) belongs to esters. Esters are widespread in nature and are widely used in industry. In nature, fats are in general triesters derived from glycerol and fatty acids. Esters are responsible for the aroma of many fruits, including apples, durians, pears, bananas, pineapples, and strawberries. Cyclic esters are called lactones, regardless of whether they are derived from an organic or inorganic acid. One example of an organic lactone is γ-valerolactone.Category: esters-buliding-blocks

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

2,3-Carbamate mannosamine glycosyl donors in glycosylation reactions of diacetone-D-glucose. An experimental and theoretical study was written by Morelli, Laura;Legnani, Laura;Ronchi, Silvia;Confalonieri, Laura;Imperio, Daniela;Toma, Lucio;Compostella, Federica. And the article was included in Carbohydrate Research in 2021.SDS of cas: 6730-10-5 This article mentions the following:

The role of the cyclic 2,3-N,O-carbamate protecting group in directing the selectivity of mannosylation reactions of diacetone-D-glucose, promoted by BSP/Tf₂O via α-triflate intermediates, has been investigated through a combined computational and exptl. approach. DFT calculations were used to locate the transition states leading to the α or β anomers. These data indicate the preferential formation of the β-adduct with mannosyl donors either equipped with the 4,6-O-benzylidene protection or without it. The synthetic results confirmed this preference, showing in both cases an α/β selectivity of 4:6. This highlights a role for the 2,3-N,O-carbamate in sharp contrast with what described in the case of 2,3-O-carbonate mannosyl donors. In the experiment, the researchers used many compounds, for example, (2S,3S,4R,5S,6R)-3-Acetamido-6-(acetoxymethyl)tetrahydro-2H-pyran-2,4,5-triyl triacetate (cas: 6730-10-5SDS of cas: 6730-10-5).

(2S,3S,4R,5S,6R)-3-Acetamido-6-(acetoxymethyl)tetrahydro-2H-pyran-2,4,5-triyl triacetate (cas: 6730-10-5) belongs to esters. Esters perform as high-grade solvents for a broad array of plastics, plasticizers, resins, and lacquers, and are one of the largest classes of synthetic lubricants on the commercial market. Polyesters are important plastics, with monomers linked by ester moieties. Many esters have the potential for conformational isomerism, but they tend to adopt an s-cis (or Z) conformation rather than the s-trans (or E) alternative, due to a combination of hyperconjugation and dipole minimization effects. The preference for the Z conformation is influenced by the nature of the substituents and solvent, if present. Lactones with small rings are restricted to the s-trans (i.e. E) conformation due to their cyclic structure.SDS of cas: 6730-10-5

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

Comprehensive insights into the interactions of dicyclohexyl phthalate and its metabolite to human serum albumin was written by Lv, Xiaolan;Jiang, Zheng;Zeng, Guofang;Zhao, Sujuan;Li, Na;Chen, Fengping;Huang, Xiaojian;Yao, Jia;Tuo, Xun. And the article was included in Food and Chemical Toxicology in 2021.Application In Synthesis of Dicyclohexyl phthalate This article mentions the following:

Phthalate esters (PAEs) are a type of persistent organic pollutants and have received widespread concerns due to their adverse effects on human health. Dicyclohexyl phthalate (DCHP) and its metabolite monocyclohexyl phthalate (MCHP) were selected to explore the mechanism for interaction of PAEs with human serum albumin (HSA) through mol. docking and several spectroscopic techniques. The results showed that DCHP/MCHP can spontaneously occupy site I to form a binary complex with HSA, and DCHP exhibited higher binding affinity to HSA than MCHP. At 298 K, the binding constants (K_b) of DCHP and MCHP to HSA were 24.82 x 10⁴ and 1.04 x 10⁴ M^-1, resp. Hydrogen bonds and van der Waals forces were the major driving forces in DCHP/MCHP-HSA complex. The presence of DCHP/MCHP induced the secondary structure changes in HSA, and the pi electrons of the benzene ring skeleton of DCHP/MCHP played a key role in this binding processes. Exposure of DCHP/MCHP to TM4 cells revealed that interactions between PAEs and serum albumin can affect their cytotoxicity; DCHP showed higher toxicity than MCHP. The binding affinity of PAEs with HSA may be a valuable parameter for rapid assessment of their toxicity to organisms. In the experiment, the researchers used many compounds, for example, Dicyclohexyl phthalate (cas: 84-61-7Application In Synthesis of Dicyclohexyl phthalate).

Dicyclohexyl phthalate (cas: 84-61-7) belongs to esters. Esters typically have a pleasant smell; those of low molecular weight are commonly used as fragrances and are found in essential oils and pheromones. Acyl chlorides and acid anhydrides alcoholysis is another way to produce esters. Acyl chlorides and acid anhydrides react with alcohols to produce esters. Anydrous conditions are recommended since both acyl chlorides and acid anhydrides react with water.Application In Synthesis of Dicyclohexyl phthalate

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

RAFT grafting polymerization of styrene on the surface of SiO₂ was written by Li, De-ling;Wang, Wei;Li, Ping;Wang, Dong-chao. And the article was included in Gongneng Gaofenzi Xuebao in 2012.Related Products of 27249-90-7 This article mentions the following:

Double bonds were immobilized onto nano-SiO₂ via hydrolyzing alkoxysilane moiety of γ-methacryl trimethoxysilane for condensation with hydroxide groups from nano-SiO₂. RAFT grafting polymerization of styrene from nano-SiO₂ was carried out from the immobilized double bonds, in which azobisisobutyronitrile was used as initiator, 2-cyanoprop-2-yl dithiobenzoate, benzyl dithiobenzoate, benzyl dithiopivalate, 1,2,4-triazolyl-1-carbodithioic acid benzyl ester were used as RAFT agent, resp. Results showed that RAFT grafting polymerization rate of styrene from SiO₂ was decided by Z group of RAFT agent. Grafting polymerization of styrene from SiO₂ mediated by benzyl dithiopivalate exhibited the highest grafting polymerization rate. In the experiment, the researchers used many compounds, for example, Benzyl benzodithioate (cas: 27249-90-7Related Products of 27249-90-7).

Benzyl benzodithioate (cas: 27249-90-7) belongs to esters. Esters perform as high-grade solvents for a broad array of plastics, plasticizers, resins, and lacquers, and are one of the largest classes of synthetic lubricants on the commercial market. Polyesters are important plastics, with monomers linked by ester moieties. Esters contain a carbonyl center, which gives rise to 120° C–C–O and O–C–O angles. Unlike amides, esters are structurally flexible functional groups because rotation about the C–O–C bonds has a low barrier. Their flexibility and low polarity is manifested in their physical properties; they tend to be less rigid (lower melting point) and more volatile (lower boiling point) than the corresponding amides. Related Products of 27249-90-7

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