Month: February 2023

Preparation of 2-(mono-, di-, and trichloromethyl)phenyl isocyanates was written by Klauke, Erich;Oehlmann, Linthard. And the article was included in Synthesis in 1978.SDS of cas: 60221-81-0 This article mentions the following:

The title compounds were prepared by chlorination of o-tolyl isocyanates I (R_n = H, Cl, F, Cl₂, Cl₃, Cl₄, CF₃) under UV irradiation at 100-200°. II (R_n = H, Cl, F, 3,4-Cl₂, 5-CF₃) were prepared by UV chlorination of I with 0.5 mol-equivalent Cl₂ at 110°. Passing Cl₂ through I under UV irradiation 4 h at 120-35° gave III (R_n = H, Cl, 3-F, Cl₂, Cl₃, Cl₄, 5-CF₃), whereas IV (R_n = H, 4-, 5-Cl, 3-F) were prepared by chlorination of I under intensive UV irradiation In the experiment, the researchers used many compounds, for example, 1-Fluoro-3-isocyanato-2-methylbenzene (cas: 60221-81-0SDS of cas: 60221-81-0).

1-Fluoro-3-isocyanato-2-methylbenzene (cas: 60221-81-0) 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. 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: 60221-81-0

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

Copper(I/II)-Promoted Diverse Imidazo[1,2-α]pyridine Synthesis on Solid-Phase Bound DNA Oligonucleotides for Encoded Library Design was written by Potowski, Marco;Luettig, Ricarda;Vakalopoulos, Alexandros;Brunschweiger, Andreas. And the article was included in Organic Letters in 2021.Application In Synthesis of Methyl 2-aminonicotinate This article mentions the following:

DNA-encoded libraries designed around heterocyclic scaffolds have proven highly productive in target-based screening. Here, we show the synthesis of imidazopyridines on a controlled pore glass-coupled DNA oligonucleotide for solid phase-initiated encoded library synthesis. The target compounds were synthesized by a variant of the A3 coupling reaction from aminopyridines, alkynes, and aldehydes promoted by copper(I/II) and furnished diverse substituted scaffolds with functionalities for library design. Although proceeding under forcing conditions, it produced minimal DNA damage. In the experiment, the researchers used many compounds, for example, Methyl 2-aminonicotinate (cas: 14667-47-1Application In Synthesis of 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. 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 Methyl 2-aminonicotinate

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

A light-activated nanotherapeutic with broad-spectrum bacterial recognition to eliminate drug-resistant pathogens was written by Wei, Xiaosong;Gao, Yingchao;Hu, Yuqing;Zhang, Yufei;Zhang, Xinge. And the article was included in Journal of Materials Chemistry B: Materials for Biology and Medicine in 2021.Computed Properties of C16H22O11 This article mentions the following:

Obstinate infections caused by drug-resistant bacteria severely threaten human health. And the emergence of multidrug-resistant bacteria increases the morbidity and mortality of patients, thus necessitating the development of innovative or alternative therapeutics. Here, a light-activated nanotherapeutic with broad-spectrum bacterial recognition is established as an antibiotic-free therapeutic agent against pathogens. The nanotherapeutic with external phenylboronic acid-based glycopolymers increases the stability and biocompatibility and shows the ability of bacterial recognition. Once irradiated with near-IR light, this nanotherapeutic with high photothermal conversion efficiency disrupts the cytoplasmic membrane, thus killing bacterial cells. Importantly, it also eliminates the biofilms formed by both drug-resistant Gram-neg. bacteria (Pseudomonas aeruginosa) and Gram-pos. bacteria (Staphylococcus aureus) effectively. Thus, this antibiotic-free nanotherapeutic with hypotoxicity offers a promising approach to fight increasingly serious antimicrobial resistance. In the experiment, the researchers used many compounds, for example, (2S,3R,4S,5S,6R)-6-(Acetoxymethyl)tetrahydro-2H-pyran-2,3,4,5-tetrayl tetraacetate (cas: 4163-60-4Computed Properties of C16H22O11).

(2S,3R,4S,5S,6R)-6-(Acetoxymethyl)tetrahydro-2H-pyran-2,3,4,5-tetrayl tetraacetate (cas: 4163-60-4) 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 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. Computed Properties of C16H22O11

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

Rational design, synthesis and anti-proliferative properties of new CB2 selective cannabinoid receptor ligands: An investigation of the 1,8-naphthyridin-2(1H)-one scaffold was written by Manera, Clementina;Saccomanni, Giuseppe;Malfitano, Anna Maria;Bertini, Simone;Castelli, Francesca;Laezza, Chiara;Ligresti, Alessia;Lucchesi, Valentina;Tuccinardi, Tiziano;Rizzolio, Flavio;Bifulco, Maurizio;Di Marzo, Vincenzo;Giordano, Antonio;Macchia, Marco;Martinelli, Adriano. And the article was included in European Journal of Medicinal Chemistry in 2012.SDS of cas: 14667-47-1 This article mentions the following:

CB2 receptor ligands are becoming increasingly attractive drugs due to the potential role of this receptor in several physiopathol. processes. Using the previously described series of 1,8-naphthyridin-2(1H)-on-3-carboxamides as a lead class, several nitrogen heterocyclic derivatives, characterized by different central cores, were synthesized and tested for their affinity toward the human CB1 and CB2 cannabinoid receptors. The obtained results suggest that the new series of quinolin-2(1H)-on-3-carboxamides, 4-hydroxy-2-oxo-1,2-dihydro-1,8-naphthyridine-3-carboxamides and 1,2-dihydro-2-oxopyridine-3-carboxamides represent novel scaffolds very suitable for the development of promising CB2 ligands. Furthermore, the newly synthesized CB2 ligands inhibit proliferation of several cancer cell lines. In particular, it was demonstrated that in DU-145 cell line these ligands exert a CB2-mediated anti-proliferative action and decrease the CB2 receptor expression levels. In the experiment, the researchers used many compounds, for example, Methyl 2-aminonicotinate (cas: 14667-47-1SDS of cas: 14667-47-1).

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. 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: 14667-47-1

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

The synthesis and carbon-13 NMR spectra pyrrolothiazoles and their precursors. Bromine-induced cyclization of pyrrolylthioureas was written by Grehn, Leif. And the article was included in Chemica Scripta in 1979.Quality Control of Ethyl 4-nitro-1H-pyrrole-2-carboxylate This article mentions the following:

Several differently substituted pyrrolylthiourea derivatives (e.g. I) have been prepared by the action of acyl isothiocyanates on the corresponding aminopyrroles. Bromine-induced ring closure of selected pyrrolylthioureas in acetic acid or tri-Me phosphate yielded 3 possible isomers of the hitherto unknown pyrrolothiazoles (e.g. II). This reaction has wide applicability. ¹³C NMR parameters were determined for all new compounds and the direct ¹³C-¹H coupling constants in the pyrrole moiety were utilized to distinguish α- and β-carbons. In the experiment, the researchers used many compounds, for example, Ethyl 4-nitro-1H-pyrrole-2-carboxylate (cas: 5930-92-7Quality Control of Ethyl 4-nitro-1H-pyrrole-2-carboxylate).

Ethyl 4-nitro-1H-pyrrole-2-carboxylate (cas: 5930-92-7) belongs to esters. Carboxylic acid esters of low molecular weight are colourless, volatile liquids with pleasant odours, slightly soluble in water. 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 Ethyl 4-nitro-1H-pyrrole-2-carboxylate

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

Novel salicylic acid analogs induce a potent defense response in Arabidopsis was written by Palmer, Ian Arthur;Chen, Huan;Chen, Jian;Chang, Ming;Li, Min;Liu, Fengquan;Fu, Zheng Qing. And the article was included in International Journal of Molecular Sciences in 2019.COA of Formula: C9H10O3 This article mentions the following:

The master regulator of salicylic acid (SA)-mediated plant defense, NPR1 (NONEXPRESSER OF PR GENES 1) and its paralogs NPR3 and NPR4, act as SA receptors. After the perception of a pathogen, plant cells produce SA in the chloroplast. In the presence of SA, NPR1 protein is reduced from oligomers to monomers, and translocated into the nucleus. Several of these analogs can induce SA-mediated defense and inhibit growth of Pseudomonas syringae in Arabidopsis. These analogs, when sprayed on Arabidopsis, can induce the accumulation of the master regulator of plant defense NPR1. In a yeast two-hybrid system, these analogs can strengthen the interactions among NPR proteins. We demonstrated that these analogs can induce the expression of the defense marker gene PR1. Furthermore, we hypothesized that these SA analogs could be potent tools against the citrus greening pathogen Candidatus liberibacter spp. In fact, our results suggest that the SA analogs we tested using Arabidopsis may also be effective for inducing a defense response in citrus. Several SA analogs consistently strengthened the interactions between citrus NPR1 and NPR3 proteins in a yeast two-hybrid system. In future assays, we plan to test whether these analogs avoid degradation by SA hydroxylases from plant pathogens. In future assays, we plan to test whether these analogs avoid degradation by SA hydroxylases from plant pathogens. In the experiment, the researchers used many compounds, for example, Ethyl 2-hydroxybenzoate (cas: 118-61-6COA of Formula: C9H10O3).

Ethyl 2-hydroxybenzoate (cas: 118-61-6) 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. 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.COA of Formula: C9H10O3

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

Highly diastereoselective epoxidation of protected α-amino alkenes catalyzed by ruthenium porphyrin/Cl₂PyNO system was written by Sun, Li;Du, Can-Ping;Qin, Jie;You, Jing-Song;Yang, Meng;Yu, Xiao-Qi. And the article was included in Journal of Molecular Catalysis A: Chemical in 2005.Recommanded Product: 133467-01-3 This article mentions the following:

Protected α-amino epoxides, e.g. I, were successfully obtained in high threo-selectivity (up to 99%) under mild reaction conditions by using carbonyl 5,10,15,20-tetra(2,6-dichlorophenyl)porphyrin ruthenium(II) [Ru(TDCPP)CO] as catalyst and 2,6-dichloropyridine N-oxide (Cl₂PyNO) as oxidant. In the experiment, the researchers used many compounds, for example, Boc-D-Leu-OMe (cas: 133467-01-3Recommanded Product: 133467-01-3).

Boc-D-Leu-OMe (cas: 133467-01-3) 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 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: 133467-01-3

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

Surface tension and interfacial tension of polyolefins and polyolefin blends was written by Charfeddine, Ilhem;Majeste, Jean-Charles;Carrot, Christian;Lhost, Olivier. And the article was included in Journal of Applied Polymer Science in 2022.Formula: C73H108O12 This article mentions the following:

This paper focuses on the calculation of the interfacial tension of two systems: low-d. polyethylene with isotactic polypropylene and high-d. polyethylene with syndiotactic polypropylene. For this, three methods to measure the interfacial tension are compared: the use of Palierne’s model, and Gramespacher and Meissner’s model, both based on addnl. elasticity or long relaxation times brought by shape recovery of dispersed phase, and ab-initio calculation, which requires the knowledge of the surface tension of the neat polymer measured at the same temperature For that, a database collected from the literature is built in the first section of this paper, whether for the studied systems or for other systems of various olefinic homopolymers or copolymers with polypropylene. The results show the effectiveness of the Gramespacher and Meissner’s model to calculate the interfacial tension of the studied systems for which the results were in agreement with ab-initio calculation and Palierne’s model. Extension of the ab-initio calculation to olefinic copolymers was proposed. 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: 6683-19-8Formula: C73H108O12).

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 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. 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.Formula: C73H108O12

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

Carbon-carbon bond construction at the 2-position of polysubstituted pyrimidinones was written by Zhang, Dawei;Sham, Kelvin;Cao, Guo-Qiang;Hungate, Randall;Dominguez, Celia. And the article was included in Tetrahedron Letters in 2002.Application In Synthesis of Ethyl 2-(4-fluorophenyl)acetate This article mentions the following:

A novel synthetic method to introduce a carbon-carbon bond at the 2-position of pyrimidinones via nucleophilic addition of Grignard reagents to 2-cyano pyrimidinones at ambient conditions is disclosed. This unique approach leads to the preparation of such biol. important mols. as polysubstituted pyrimidinones in good to excellent yields. In the experiment, the researchers used many compounds, for example, Ethyl 2-(4-fluorophenyl)acetate (cas: 587-88-2Application In Synthesis of Ethyl 2-(4-fluorophenyl)acetate).

Ethyl 2-(4-fluorophenyl)acetate (cas: 587-88-2) 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. 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 Ethyl 2-(4-fluorophenyl)acetate

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

mCPBA-mediated dioxygenation of unactivated alkenes for the synthesis of 5-imino-2-tetrahydrofuranyl methanol derivatives was written by Deng, Xiaojun;Zhang, Luwen;Liu, Huixia;Bai, Yu;He, Wei. And the article was included in Tetrahedron Letters in 2020.Product Details of 868-57-5 This article mentions the following:

A mCPBA-mediated, metal-free, intramol. dioxygenation reaction of unactivated alkenes is reported. In the presence of m-chlorobenzoic peracid, different unsaturated amide substrates could be cyclized via epoxide intermediates, producing the corresponding 5-imino-2-tetrahydrofuranyl methanol products in up to 94% yield at room temperature In the experiment, the researchers used many compounds, for example, Methyl2-methylbutyrate (cas: 868-57-5Product Details of 868-57-5).

Methyl2-methylbutyrate (cas: 868-57-5) 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.Product Details of 868-57-5

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