Month: January 2023

Controlled Synthesis of a Novel Heteropolymetallic Complex with Selectively Incorporated Lanthanide(III) Ions was written by Debroye, Elke;Ceulemans, Matthias;Vander Elst, Luce;Laurent, Sophie;Muller, Robert N.;Parac-Vogt, Tatjana N.. And the article was included in Inorganic Chemistry in 2014.Quality Control of tert-Butyl 4-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)benzylcarbamate This article mentions the following:

A novel synthetic strategy toward a heteropolymetallic lanthanide complex with selectively incorporated Gd and Eu ions is outlined. Luminescence and relaxometric measurements suggest possible applications in bimodal (magnetic resonance/optical) imaging. In the experiment, the researchers used many compounds, for example, tert-Butyl 4-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)benzylcarbamate (cas: 330794-35-9Quality Control of tert-Butyl 4-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)benzylcarbamate).

tert-Butyl 4-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)benzylcarbamate (cas: 330794-35-9) belongs to esters. Esters are also usually derived from carboxylic acids. It may also be obtained by reaction of acid anhydride or acid halides with alcohols or by the reaction of salts of carboxylic acids with alkyl halides. Esters are more polar than ethers but less polar than alcohols. They participate in hydrogen bonds as hydrogen-bond acceptors, but cannot act as hydrogen-bond donors, unlike their parent alcohols. This ability to participate in hydrogen bonding confers some water-solubility.Quality Control of tert-Butyl 4-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)benzylcarbamate

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

New Potential Anticancer Agents Based on the Anthranilic Acid Scaffold. Synthesis and Evaluation of Biological Activity was written by Congiu, Cenzo;Cocco, Maria Teresa;Lilliu, Valentina;Onnis, Valentina. And the article was included in Journal of Medicinal Chemistry in 2005.COA of Formula: C7H8N2O2 This article mentions the following:

The synthesis and anticancer activity of new compounds I (X = Y = CH, N; X = CH, Y = N; R = 2-MeOC₆H₄, 3-ClC₆H₄, 2,4,6-Cl₃C₆H₂, 3-pyridyl, etc.), designed on the anthranilic acid scaffold, are reported. The antiproliferative activity was assayed by the National Cancer Institute in established in vitro and in vivo anticancer exptl. models. Structural variations based on the flufenamic acid motif afforded a series of (hetero)aryl esters of N-(2-(trifluoromethyl)pyridin-4-yl)anthranilic acid, which showed in vitro growth inhibitory properties against human tumor cell lines in nanomolar to low micromolar concentrations The pyridinyl ester I [X = CH; Y = N; R = 3-pyridyl; (II)] exhibited very potent in vitro antiproliferative efficacy, with a chemosensitive profile showing a number of GI₅₀ values at concentrations lower than 10^-7 M in the full panel of human tumor cell lines. II was also tested in vivo as a potential anticancer agent in the hollow fiber assay and in human tumor xenografts, showing moderate inhibitory properties. Anal. of biol. activities and the COMPARE procedure was utilized to support putative biochem. mechanisms implicated with the antiproliferative activity. In the experiment, the researchers used many compounds, for example, Methyl 2-aminonicotinate (cas: 14667-47-1COA of Formula: C7H8N2O2).

Methyl 2-aminonicotinate (cas: 14667-47-1) 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. 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.COA of Formula: C7H8N2O2

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

The Use of Chiral BINAM NHC-Rh(III) Complexes in Enantioselective Hydrosilylation of 3-Oxo-3-arylpropionic Acid Methyl or Ethyl Esters was written by Xu, Qin;Gu, Xingxing;Liu, Sijia;Dou, Qinyu;Shi, Min. And the article was included in Journal of Organic Chemistry in 2007.Formula: C12H14O3 This article mentions the following:

Axially chiral BINAM N-heterocyclic carbene (NHC)-Rh(III) complexes were applied in the enantioselective hydrosilylation of 3-oxo-3-arylpropionic acid Me or Et esters. The reduction products 3-hydroxy-3-arylpropionic acid Me or Et esters could be obtained in good yields with good to excellent enantioselectivities under mild conditions. In the experiment, the researchers used many compounds, for example, Ethyl 3-oxo-3-(m-tolyl)propanoate (cas: 33166-79-9Formula: C12H14O3).

Ethyl 3-oxo-3-(m-tolyl)propanoate (cas: 33166-79-9) 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, including apples, durians, pears, bananas, pineapples, and strawberries. 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. Formula: C12H14O3

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

A supramolecular system for quantifying aromatic stacking interactions was written by Adams, Harry;Hunter, Christopher A.;Lawson, Kevin R.;Perkins, Julie;Spey, Sharon E.;Urch, Christopher J.;Sanderson, John M.. And the article was included in Chemistry – A European Journal in 2001.Computed Properties of C7H8N2O4 This article mentions the following:

A supramol. complex for investigating the thermodn. properties of intermol. aromatic stacking interactions has been developed. The conformation of the complex is locked in a single well-defined conformation by an array of H-bonding interactions that force two aromatic rings on one end of the complex into a stacked geometry. Chem. double-mutant cycles have been used to measure an anthracene-aniline interaction (+0.6±0.8 kJmol^-1) and a pentafluorophenyl-aniline interaction (-0.4±0.9 kJmol^-1) in this system. Although the interactions are very weak, the pentafluorophenyl interaction is attractive, whereas the anthracene interaction is repulsive: this is consistent with the dominance of π-electron electrostatic interactions. The nitropyrrole subunits used to control the conformation of these complexes lead to problems of aggregation and multiple conformational equilibrium The implications for the thermodn. anal. are examined in detail, and the double-mutant-cycle approach is found to be remarkably robust with respect to such effects, since systematic errors in individual experiments are removed in a pair-wise fashion when the cycle is constructed. In the experiment, the researchers used many compounds, for example, Ethyl 4-nitro-1H-pyrrole-2-carboxylate (cas: 5930-92-7Computed Properties of C7H8N2O4).

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. 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.Computed Properties of C7H8N2O4

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

Structure-activity relationships for the mutagenic activity of tricyclic intercalating agents in Salmonella typhimurium was written by Denny, William A.;Turner, Pamela M.;Atwell, Graham J.;Rewcastle, Gordon W.;Ferguson, Lynnette R.. And the article was included in Mutation Research, Fundamental and Molecular Mechanisms of Mutagenesis in 1990.Recommanded Product: Methyl 2-aminonicotinate This article mentions the following:

A total of 25 different tricyclic DNA-intercalating chromophores bearing a common -CONH(CH₂)₂NMe₂ solubilizing side-chain were compared with the classical frameshift mutagen 9-aminoacridine for their ability to induce revertants in S. typhimurium strain TA1537 (sensitive to frameshift mutation by acridine mutagens). The compounds showed varying levels of activity in this strain. For the fused linear and fused angular tricyclics, activity varied from zero to similar levels to 9-aminoacridine, but with no discernable relationship between activity and either structure or the measured physico-chem. properties. However, the 2-1 tricyclic compounds had essentially no mutagenic activity. Since several of these compounds have high in vivo antitumor activity, this is useful knowledge. In the experiment, the researchers used many compounds, for example, Methyl 2-aminonicotinate (cas: 14667-47-1Recommanded Product: Methyl 2-aminonicotinate).

Methyl 2-aminonicotinate (cas: 14667-47-1) 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. 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.Recommanded Product: Methyl 2-aminonicotinate

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

The occurrence and ecological risk assessment of typical organic pollutants in the effluents of urban reclaimed water plants was written by Wang, Long;Xu, Xiong;Zhu, Dan;Li, Xiongyong;Zhang, Guangxin;Chen, Gang;Liu, Quanzhen;Lin, Lihua;Wang, Donghong. And the article was included in Huanjing Kexue Xuebao in 2021.Related Products of 84-61-7 This article mentions the following:

The utilization of reclaimed water has been widely concerned by the society due to its potential ecol. and health risks because of the trace amount of organic pollutants in reclaimed water. In order to explore the occurrence of the typical organic pollutants (including PAHs, PAEs and pesticides) in reclaimed water and their removal before and after upgrading and reconstruction of wastewater treatment plant, the effluents from 5 water reclamation plants in Beijing were monitored continuously for 6 mo in 2019, and their ecol. risks were assessed. The results showed that the pollutants with 100% detection rate were NaP, Flu, Phe, Ant, Flua, Pyr, BaA, Chr, BaP, DMP, DEP, DIBP, DNBP, DEHP, dichlorvos and atrazine. PAHs with two and three aromatic rings were the main components, mainly including Phe, NaP, Flu, Ant and Ace, accounting for more than 55% of the total PAHs. For PAEs, DEHP, DMP, DIBP and DNBP were the main PAEs components, accounting for more than 80% of the total PAEs. For pesticides, dichlorvos and atrazine were the main components. The monthly average concentration of PAHs, PAEs and pesticides were 53.6�5.9, 4881.3�050.2, and 77.7�7.2 ng·L^-1, resp. Compared with the effluents of water reclamation plants before the upgrading and reconstruction, the concentrations of these typical organic pollutants decreased significantly. The ecol. risk assessment showed that PAHs, DMP, DEHP, DEP, atrazine and chlorothalonil were at low-risk level in the effluents; but DIBP and DNBP were medium-risk or high-risk pollutants; and the dichlorvos and chlorpyrifos showed moderate risk in individual samples. In the experiment, the researchers used many compounds, for example, Dicyclohexyl phthalate (cas: 84-61-7Related Products of 84-61-7).

Dicyclohexyl phthalate (cas: 84-61-7) 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. 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.Related Products of 84-61-7

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

Structure and performance of hydrogenated styrenic block copolymers/polypropylene/oil ( HSBCs / PP /oil) composites was written by Wu, Rui;Liu, Junyi;Xiong, Chunzhu;Zhen, Xinping;Hu, Beili;Yao, Huijiang;Jiao, Zhen;Wu, Jianxun. And the article was included in Polymers for Advanced Technologies in 2021.Recommanded Product: 2,2-Bis(((3-(3,5-di-tert-butyl-4-hydroxyphenyl)propanoyl)oxy)methyl)propane-1,3-diyl bis(3-(3,5-di-tert-butyl-4-hydroxyphenyl)propanoate) This article mentions the following:

In the past few decades, considerable attention has been paid to the thermoplastic elastomer (TPE). Among them, hydrogenated styrenic block copolymers (HSBCs) have attracted extensive interest because of outstanding ozone resistance, remarkable aging properties, and environmental friendliness. Therefore, theor. and exptl. investigations on the HSBCs/PP/oil composites have been reported many times, but the influence of mol. structure on the structure and properties of composites has yet to be identified. In this study, three HSBCs with different mol. structures were used as the research object to systematically study the effects of their mol. structural differences on the aggregate structure, microstructural, mech., and thermal properties of HSBCs/PP/oil composites. It was found thatthe content of side groups in the mol. chain was the main factor affecting the structure and performance of the HSBCs/PP/oil composites. This research can provide theor. guidance for the mol. design and structural control of the new HSBC, so it has obvious theor. significance and practical value. In the experiment, the researchers used many compounds, for example, 2,2-Bis(((3-(3,5-di-tert-butyl-4-hydroxyphenyl)propanoyl)oxy)methyl)propane-1,3-diyl bis(3-(3,5-di-tert-butyl-4-hydroxyphenyl)propanoate) (cas: 6683-19-8Recommanded Product: 2,2-Bis(((3-(3,5-di-tert-butyl-4-hydroxyphenyl)propanoyl)oxy)methyl)propane-1,3-diyl bis(3-(3,5-di-tert-butyl-4-hydroxyphenyl)propanoate)).

2,2-Bis(((3-(3,5-di-tert-butyl-4-hydroxyphenyl)propanoyl)oxy)methyl)propane-1,3-diyl bis(3-(3,5-di-tert-butyl-4-hydroxyphenyl)propanoate) (cas: 6683-19-8) 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. 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. Recommanded Product: 2,2-Bis(((3-(3,5-di-tert-butyl-4-hydroxyphenyl)propanoyl)oxy)methyl)propane-1,3-diyl bis(3-(3,5-di-tert-butyl-4-hydroxyphenyl)propanoate)

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

Nitration-Peroxidation of Alkenes: A Selective Approach to β-Peroxyl Nitroalkanes was written by Chen, Yuanjin;Ma, Yangyang;Li, Liangkui;Jiang, Hao;Li, Zhiping. And the article was included in Organic Letters in 2019.Reference of 118-61-6 This article mentions the following:

Nitration-peroxidation of alkenes for the synthesis of β-peroxyl nitroalkanes has been developed by using tert-Bu nitrite and tert-Bu hydroperoxide. The method presents a new and selective difunctionalization of alkenes to introduce a nitro group and a peroxyl group across the double bonds of alkenes under mild conditions. A radical reaction pathway is proposed by exptl. and theor. studies. Of note, mixing a metal salt and peroxide can cause an explosion. In the experiment, the researchers used many compounds, for example, Ethyl 2-hydroxybenzoate (cas: 118-61-6Reference of 118-61-6).

Ethyl 2-hydroxybenzoate (cas: 118-61-6) 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. Esters are more polar than ethers but less polar than alcohols. They participate in hydrogen bonds as hydrogen-bond acceptors, but cannot act as hydrogen-bond donors, unlike their parent alcohols. This ability to participate in hydrogen bonding confers some water-solubility.Reference of 118-61-6

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

Temperature- and Light-Responsive Polyacrylamides Prepared by a Double Polymer Analogous Reaction of Activated Ester Polymers was written by Jochum, Florian D.;Theato, Patrick. And the article was included in Macromolecules (Washington, DC, United States) in 2009.Recommanded Product: Benzyl benzodithioate This article mentions the following:

Two different series of polyacrylamides containing different amounts of salicylideneaniline moieties have been synthesized via a double polymer analogous reaction of poly(pentafluorophenyl acrylate) (PPFPA). All copolymers were designed to exhibit a lower critical solution temperature (LCST) in aqueous solution, which was dependent on (i) the amount of incorporated chromophoric salicylideneaniline groups and (ii) the isomerization state of the resp. salicylideneaniline group. Higher LCST values were measured for UV-irradiated solutions of the copolymers in comparison to the nonirradiated copolymer solutions A maximum difference in the LCST of up to 13 °C was found for poly(N-cyclopropylacrylamide) copolymer containing 15.0 mol % of salicylideneaniline groups. Within this temperature range, a reversible solubility change of the copolymer could be induced by irradiation with light. In the experiment, the researchers used many compounds, for example, Benzyl benzodithioate (cas: 27249-90-7Recommanded Product: Benzyl benzodithioate).

Benzyl benzodithioate (cas: 27249-90-7) 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. Esters are more polar than ethers but less polar than alcohols. They participate in hydrogen bonds as hydrogen-bond acceptors, but cannot act as hydrogen-bond donors, unlike their parent alcohols. This ability to participate in hydrogen bonding confers some water-solubility.Recommanded Product: Benzyl benzodithioate

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

RNA-Seq Reveals the Effect of Ethylene on the Volatile Organic Components (VOCs) of Cavendish Banana at Different Post-harvesting Stages was written by Dou, Tongxin;Hu, Chunhua;Zhao, Shujing;Gao, Huijun;He, Weidi;Deng, Guiming;Sheng, Ou;Bi, Fangcheng;Yang, Qiaosong;Li, Chunyu;Yi, Ganjun;Dong, Tao. And the article was included in Journal of Plant Growth Regulation in 2022.Name: Isopentyl 3-methylbutanoate This article mentions the following:

Aroma serves as one of the decisive factors influencing the value of banana commodities. Most of characteristic volatile organic components (VOCs) are formed during post-harvesting. However, the changing of VOCs of banana at different post-harvesting stages remain ambiguous. In this study, the VOCs of Cavendish banana for the four typical post-harvesting stages (green stage/half of yellow stage/yellow ripening stage/over ripening stage) are clarified using headspace solid phase micro-extraction (HS-SPME), combined with gas chromatog.-mass spectrometry (GC-MS). The results inferred that the relative content of branched-chain esters such as acetate and butyrate, which form the main contributors of aroma in bananas, is higher in the T2 and T3 stages. Further, RNA-Seq technol. was employed to clarify the formation mechanism of banana aroma in the post-harvesting stage. The MaTGL4 gene of the linoleic acid metabolism pathway and the MaBCAT3 and MaBCAT5 genes of the valine, leucine and isoleucine degradation pathway in banana suggest the expression is active late in the ripening stage, and the upregulated expression of these genes is analogus to the formation of aroma components such as branched-chain esters and hexenal. The above results not only provide baseline data on the differences in phys. and chem. properties of VOCs in various post-harvesting stages of banana production, but also provide theor. guidance facilitating the subsequent improvement of the com. value of bananas through genetic improvement. In the experiment, the researchers used many compounds, for example, Isopentyl 3-methylbutanoate (cas: 659-70-1Name: Isopentyl 3-methylbutanoate).

Isopentyl 3-methylbutanoate (cas: 659-70-1) 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. Name: Isopentyl 3-methylbutanoate

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