Category: esters-buliding-blocks

Effect of polypropylene molecular weight distribution on the balance between the toughness and rigidity of the impact polypropylene composites was written by Li, Fushi;Gao, Yunbao;Yan, Nan;Zhang, Chunyu;Zhang, Xuequan;Jiang, Wei. And the article was included in Journal of Applied Polymer Science in 2022.Related Products of 6683-19-8 This article mentions the following:

In this study, homo-polypropylene (HPP) with the same number average mol. weight (M n) while different mol. weight distribution (MWD) are directly melt blended with a polyolefin elastomer (POE) in order to study the effects of the MWD of HPP on the brittle-ductile transition (BDT) and the balance between toughness and rigidity of the PP/POE composites. The results show that for the same number average mol. weight HPP, the wider the MWD, the higher the brittle strength σ_b of the HPP is, and the larger the critical interparticle distance (ID_c) of the composite is. Larger ID_c means lower modifier content can induce the BDT, and thereby leads to less modulus loss of the composites. Namely, the toughened HPP with wider MWD can have a better balance between toughness and rigidity. 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: 6683-19-8Related Products of 6683-19-8).

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 typically have a pleasant smell; those of low molecular weight are commonly used as fragrances and are found in essential oils and pheromones. 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.Related Products of 6683-19-8

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

Development of 5-hydroxypyrazole derivatives as reversible inhibitors of lysine specific demethylase 1 was written by Mould, Daniel P.;Bremberg, Ulf;Jordan, Allan M.;Geitmann, Matthis;Maiques-Diaz, Alba;McGonagle, Alison E.;Small, Helen F.;Somervaille, Tim C. P.;Ogilvie, Donald. And the article was included in Bioorganic & Medicinal Chemistry Letters in 2017.SDS of cas: 173341-02-1 This article mentions the following:

A series of reversible inhibitors of lysine specific demethylase 1 (LSD1) with a 5-hydroxypyrazole scaffold have been developed from compound 7, which was identified from the patent literature. Surface plasmon resonance (SPR) and biochem. anal. showed it to be a reversible LSD1 inhibitor with an IC₅₀ value of 0.23 μM. Optimization of this compound by rational design afforded compounds with K_d values of <10 nM. In human THP-1 cells, these compounds were found to upregulate the expression of the surrogate cellular biomarker CD86. Compound 11p was found to have moderate oral bioavailability in mice suggesting its potential for use as an in vivo tool compound In the experiment, the researchers used many compounds, for example, tert-Butyl (morpholin-2-ylmethyl)carbamate (cas: 173341-02-1SDS of cas: 173341-02-1).

tert-Butyl (morpholin-2-ylmethyl)carbamate (cas: 173341-02-1) 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. Esterification is the general name for a chemical reaction in which two reactants (typically an alcohol and an acid) form an ester as the reaction product. Esters are common in organic chemistry and biological materials.SDS of cas: 173341-02-1

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

Selection of non-Saccharomyces yeasts for orange wine fermentation based on their enological traits and volatile compounds formation was written by Hu, Lanlan;Wang, Jia;Ji, Xueao;Liu, Rui;Chen, Fusheng;Zhang, Xiuyan. And the article was included in Journal of Food Science and Technology (New Delhi, India) in 2018.Reference of 659-70-1 This article mentions the following:

In order to select the non-Saccharomyces yeasts for orange wine fermentation, the enol. traits and volatile compounds formation of ten non-Saccharomyces yeast strains were evaluated through physicochem. methods and solid-phase microextraction coupled to GC-MS, resp. The results indicated that non-Saccharomyces yeast fermentation had lower maximum populations (7.8-8.0 Log cfu/mL), longer fermentation period (7-10 days), lower ethanol (4.13-7.79%), lower total acids (7.48-8.51 g/L) and higher volatile acids concentrations (0.08-0.23 g/L) when compared with those of Saccharomyces cerevisiae fermentation Hanseniaspora uvarum, Hanseniaspora opuntiae, Hanseniaspora occidentalis, Pichia kudriavzevii and Torulaspora delbrueckii were selected as candidates for orange wine fermentation with higher volatile compounds concentration, odor active values and sensory evaluation scores. This study will provide a valuable selection method of non-Saccharomyces yeasts for orange wine fermentation, and an approach to improve the flavor of orange wine or other fruit wine. In the experiment, the researchers used many compounds, for example, Isopentyl 3-methylbutanoate (cas: 659-70-1Reference of 659-70-1).

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

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

The rapid preparation of 2-aminosulfonamide-1,3,4-oxadiazoles using polymer-supported reagents and microwave heating was written by Baxendale, Ian R.;Ley, Steven V.;Martinelli, Marisa. And the article was included in Tetrahedron in 2005.Related Products of 16413-26-6 This article mentions the following:

The preparation of a library of 5-substituted-2-amino-1,3,4-oxadiazoles, e.g., I, and the corresponding thiadiazole analogs is reported. A one-pot preparation of the 2-aminosulfonylated analogs through a three component coupling of an acylhydrazine, an isocyanate and sulfonyl chloride promoted by a polymer-supported phosphazine base under microwave dielec. heating is presented. The optimization process and details pertaining to the elucidation of the reaction products is also discussed. In the experiment, the researchers used many compounds, for example, 3-Cyanophenylisocyanate (cas: 16413-26-6Related Products of 16413-26-6).

3-Cyanophenylisocyanate (cas: 16413-26-6) 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. Related Products of 16413-26-6

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

Analysis of the essential oil composition of three cultivated Nepeta species from Iran was written by Amirmohammadi, Fatemeh Zahra;Azizi, Majid;Nemati, Seyyed Hossein;Iriti, Marcello;Vitalini, Sara. And the article was included in Zeitschrift fuer Naturforschung, C: Journal of Biosciences in 2020.Formula: C10H20O2 This article mentions the following:

Essential oils (EOs) of three Iranian cultivated Nepeta species were investigated. The oils were obtained by hydrodistillation of air-dried plant materials at full flowering stage and analyzed by gas chromatog. (GC) and gas chromatog. coupled to mass spectroscopy (GC/MS). In total, 89 compounds were detected. In over 2 years, a number of constituents were identified in the EO of Nepeta binaloudensis first and second years (26 and 37, resp.), Nepeta cataria (25 and 32, resp.), and Nepeta assurgens (45 and 50, resp.). In the oils of N. binaloudensis, 4a-α,7-α,7a-α-nepetalactone (NL) 59.7% and 1,8-cineole (19.6%) during the first and second years, resp., were the main constituents. The main components of N. cataria were 4a-α,7-α,7a-β-NL (72.8%) and 4a-α,7-β,7a-α-NL (73.9%) during the first and second years, resp., and 4a-α,7-α,7a-α-NL (55.5%) and 1,8-cineole (24.1%) during the first and second years, resp., were the main constituents of N. assurgens. The results showed that NLs isomers and 1,8-cineole were the main components of the oils of three cultivated Nepeta species. In the experiment, the researchers used many compounds, for example, Isopentyl 3-methylbutanoate (cas: 659-70-1Formula: C10H20O2).

Isopentyl 3-methylbutanoate (cas: 659-70-1) 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. 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.Formula: C10H20O2

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

Phthalates in House and Dormitory Dust: Occurrence, Human Exposure and Risk Assessment was written by Xu, Shen;Li, Chao. And the article was included in Bulletin of Environmental Contamination and Toxicology in 2021.Safety of Dicyclohexyl phthalate This article mentions the following:

Phthalates are one of ubiquitous contaminants in the indoor environment. In this study, we analyzed concentrations and profiles of 9 phthalates in dust samples collected from houses and university dormitories in Nanjing, China. The total concentrations of phthalates in house and dormitory dust ranged from 111.4 to 3599.1μg/g and 86.1 to 1262.3μg/g, resp. Phthalates in house was significantly higher than that in dormitory dust (p < 0.01). Di(2-ethylhexyl) phthalate (DEHP), di-Bu phthalate (DBP) and di-iso-Bu phthalate (DiBP) were the three predominant compounds and accounted for more than 98% of total phthalates in the two microenvironments. The estimated daily intake (EDI) of phthalates, carcinogenic risk (CR) of DEHP, and hazard index (HI) values of DEHP, DBP and DiBP were estimated Except for adults, the CR of DEHP for four subgroups (infants, toddlers, children, and teenagers) had exceeded the limitation, implying that they are at the risk of exposure to DEHP through dust ingestion. In the experiment, the researchers used many compounds, for example, Dicyclohexyl phthalate (cas: 84-61-7Safety of Dicyclohexyl phthalate).

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

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

Role of Hydrogen Bonding on the Self-Organization of Phenyleneethynylenes on Surfaces was written by Zalake, Pratap;Thomas, K. George. And the article was included in Langmuir in 2013.Recommanded Product: 313648-56-5 This article mentions the following:

A series of carboxylic acid substituted phenyleneethynylenes, having a rigid backbone of 2.7 ± 0.1 nm, were synthesized by following the Heck-Cassar-Sonogashira-Hagihara cross-coupling reaction. Hydrogen bonding, through the formation of cyclic dimers of carboxylic acid, is more preferred over catemeric structures in all the mol. systems under investigation. The formation of extended two-dimensional patterns on highly oriented pyrolytic graphite (HOPG) surface is dictated by the position as well as number of the carboxylic acid groups on the phenyleneethynylenes. Highly ordered extended arrangements, in the linear and stepwise fashion, were observed when the carboxylic acid groups are attached in the para and meta positions of phenyleneethynylenes. The vital role of the number of carboxylic acid on the organization of mols. is evident in the case of tetracarboxylic acid derivative wherein a Kagome-type structure was observed Further, the coassembly of two types of phenyleneethynylenes was achieved on HOPG surface through acid base interaction. In the experiment, the researchers used many compounds, for example, Dimethyl 5-ethynylisophthalate (cas: 313648-56-5Recommanded Product: 313648-56-5).

Dimethyl 5-ethynylisophthalate (cas: 313648-56-5) 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.Recommanded Product: 313648-56-5

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

Chemical Composition and Antifungal Activity of Essential Oil from the Roots of Tinomiscium petiolare was written by Chac, Le D.;Thinh, Bui B.;Doudkin, Roman V.;Minh Hong, Nguyen T.;Chinh, Hoang V.. And the article was included in Chemistry of Natural Compounds in 2022.Application In Synthesis of (E)-3,7-Dimethylocta-2,6-dien-1-yl acetate This article mentions the following:

Tinomiscium petiolare Hook. f. & Thomson is a medicinal species of the genus Tinomiscium (Menispermaceae). This species grows naturally in mixed forests at an altitude of 200 to 600 m in tropical Asian countries, including Vietnam. The literature search has not revealed any reports of the chem. composition and antifungal activity of the root oils of T. petiolare. The average yield of the essential oil was 0.05% ± 0.01 (v/w) calculated on a dry weight basis. In addition, significant quantities of γ-terpinene (5.50%), β-bisabolene (5.07%), geraniol (4.82%), geranyl acetate (4.70%), and (Z)-ligustilide (4.45%) were also present in the oil. This is to our knowledge the first report on the chem. composition of T. petiolare root oil. Results show that the root oil of T. petiolare inhibited the growth of Aspergillus niger with an MIC value of 200 μ g/mL. The antifungal activity of essential oil can be explained by the presence of geranial and neral. In the experiment, the researchers used many compounds, for example, (E)-3,7-Dimethylocta-2,6-dien-1-yl acetate (cas: 105-87-3Application In Synthesis of (E)-3,7-Dimethylocta-2,6-dien-1-yl acetate).

(E)-3,7-Dimethylocta-2,6-dien-1-yl acetate (cas: 105-87-3) 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.Application In Synthesis of (E)-3,7-Dimethylocta-2,6-dien-1-yl acetate

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

Pyrimidinyl Biphenylureas: Identification of New Lead Compounds as Allosteric Modulators of the Cannabinoid Receptor CB₁ was written by Khurana, Leepakshi;Fu, Bo-Qiao;Duddupudi, Anantha L.;Liao, Yu-Hsien;Immadi, Sri Sujana;Kendall, Debra A.;Lu, Dai. And the article was included in Journal of Medicinal Chemistry in 2017.Category: esters-buliding-blocks This article mentions the following:

The allosteric modulator 1-(4-chlorophenyl)-3-(3-(6-(pyrrolidin-1-yl)pyridin-2-yl)phenyl)urea (PSNCBAM-1, 2) bound the cannabinoid receptor 1 (CB₁) and antagonized G protein coupling. This compound demonstrated potent anorectic effects similar to the CB₁ antagonist rimonabant that once was marketed for the treatment of obesity, suggesting a new chem. entity for the discovery of antiobesity drugs. To increase structural diversity of this class of CB₁ ligands, we designed and synthesized two classes of novel analogs, in which the pyridine ring of 2 was replaced by a pyrimidine ring. These pos. modulate the binding of the CB₁ orthosteric agonist CP55,940 while exhibiting an antagonism of G-protein coupling activity. Interestingly, compounds 7d and 8d demonstrated ERK1/2 phosphorylation mediated via β-arrestin unlike the orthosteric CP55,940 that does so in a G protein-dependent manner. These can serve as new lead compounds for the future development of CB₁ allosteric modulators that show biased agonism and potentially antiobesity behavior via a new mechanism. In the experiment, the researchers used many compounds, for example, 3-Cyanophenylisocyanate (cas: 16413-26-6Category: esters-buliding-blocks).

3-Cyanophenylisocyanate (cas: 16413-26-6) 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.Category: esters-buliding-blocks

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

Separation and quantification of dead species in styrene RAFT polymerization by gradient polymer elution chromatography was written by Guo, Ruiwei;Shi, Zhipeng;Wang, Xingxing;Dong, Anjie;Zhang, Jianhua. And the article was included in Polymer Chemistry in 2012.Application of 27249-90-7 This article mentions the following:

In living polymerization, the inevitable dead chain impurities, due to bimol. termination and side reactions, are not only an obstacle for the synthesis of pure block copolymers but also an impairment in the application performance of the resulting polymer materials. In this paper, a simple separation and quantification method based on gradient polymer elution chromatog. (GPEC) was developed to exptl. investigate the dead species in RAFT polymerization of styrene. The RAFT-prepared polystyrene (PSt) was extended with Me acrylate in a specially-designed chain extension reaction, in which the living PSt chains were extended and transformed into block copolymer, but the remaining dead PSt chains (D-PSt) will remain constant and can be separated and quantified by GPEC. The systematic exptl. investigation of the effect of various polymerization parameters on the mass fraction of dead species (f_D-PSt) in RAFT-prepared polystyrene (PSt) was implemented. The results clearly demonstrated the initiator concentration and RAFT agent concentration can exhibit a linear and inversely proportional dependence on f_D-PSt, resp. In addition, the dead chains were found to be formed throughout the entire RAFT process. These unambiguous exptl. data confirmed the previous theor. calculation and model prediction, which may be beneficial to understand RAFT processes, optimize polymerization conditions and to minimize dead polymer contaminations. Moreover, the method based on GPEC proposed here was able to fractionate and quantify the dead and living species, which can serve as a powerful tool in the mechanistic study of the living radical polymerizations In the experiment, the researchers used many compounds, for example, Benzyl benzodithioate (cas: 27249-90-7Application of 27249-90-7).

Benzyl benzodithioate (cas: 27249-90-7) 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. 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.Application of 27249-90-7

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