Category: esters-buliding-blocks

《Design, synthesis, molecular modelling and anticancer activities of new fused phenanthrolines》 was published in Molecules in 2020. These research results belong to Al Matarneh, Cristina Maria; Amarandi, Roxana Maria; Craciun, Anda Mihaela; Mangalagiu, Ionel I.; Zbancioc, Gheorghita; Danac, Ramona. Electric Literature of C5H6O2 The article mentions the following:

Three series of fused pyrrolophenanthroline derivatives were designed as analogs of phenstatin and synthesized in two steps starting with 1,7-phenanthroline, 4,7-phenanthroline and 1,10-phenanthroline, resp. Two (Compounds 8a and 11c) of the four compounds tested against a panel of sixty human cancer cell lines of the National Cancer Institute (NCI) exhibited significant growth inhibition activity on several cell lines. Compound 11c showed a broad spectrum in terms of antiproliferative efficacy with GI50 values in the range of 0.296 to 250μM. Mol. docking studies indicated that Compounds 8a and 11c are accommodated in the colchicine binding site of tubulin in two different ways. The experimental part of the paper was very detailed, including the reaction process of Ethyl propiolate(cas: 623-47-2Electric Literature of C5H6O2)

Ethyl propiolate(cas: 623-47-2) is a clear colorless to pale yellow liquid that is soluble in ethanol, ether and chloroform. It an important organic chemical raw material and pharmaceutical intermediate. Ethyl propargylate is obtained by oxidation of propargyl alcohol to propargylic acid followed by esterification.Electric Literature of C5H6O2

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

《Chiral Cd(II) Coordination Polymers Based on Amino Acid Derivatives: The Effect of Side Chain on Structure》 was published in Crystal Growth & Design in 2020. These research results belong to Tay, Hui Min; Hua, Carol. HPLC of Formula: 7524-52-9 The article mentions the following:

Homochiral coordination polymers have emerged as promising candidates for a range of chirotechnol. applications, including asym. catalysis and enantioselective separation The use of ligands derived from naturally occurring L-amino acids is an inexpensive and effective approach for generating a range of homochiral coordination polymers. To investigate the structure-directing effect of the amino acid side chain, seven homochiral Cd(II) frameworks were synthesized using semirigid dicarboxylates composed of L-amino acids appended to terephthalic acid (H2TMXxx, where Xxx = Ala, Val, Phe, Trp, Tyr, and His) and bis(4-pyridyl)ethylene coligands. When Xxx = Val, Tyr, Phe, or Trp, a series of 2D (4,4)-networks were obtained, in which the different intermol. interactions of the side chains result in subtle changes in crystal packing. Employing Xxx = Ala or Tyr led to 3D frameworks with a {65·8} topol., in which the varying steric bulk of the side chains results in significant differences in framework geometry as well as the shape and volume of the solvent-accessible channels. When Xxx = His, the imidazole side chains coordinate to the metal center to direct the formation of a 3D pillared structure that undergoes 2-fold interpenetration. In the experiment, the researchers used H-Trp-OMe.HCl(cas: 7524-52-9HPLC of Formula: 7524-52-9)

H-Trp-OMe.HCl(cas:7524-52-9) is one of amino acid derivatives. Amino acid derivatives represent an important category of skin penetration promoters. These compounds possess hydrophobic chains attached to an amino acid headgroup via a biodegradable ester bond. Due to the amphiphilic nature of these derivatives, it is possible for them to enter into the SC lipid barrier and significantly disorganize skin membrane lipids.HPLC of Formula: 7524-52-9

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

The author of 《Metal-, Photocatalyst-, and Light-Free Direct C-H Acylation and Carbamoylation of Heterocycles》 were Westwood, Matthew T.; Lamb, Claire J. C.; Sutherland, Daniel R.; Lee, Ai-Lan. And the article was published in Organic Letters in 2019. Reference of Ethyl oxalyl monochloride The author mentioned the following in the article:

Direct C-H acylation and carbamoylation of heterocycles can be readily achieved without requiring any conventional metal, photocatalyst, electrocatalysis, or light activation, thus significantly improving on sustainability, costs, toxicity, waste, and simplicity of the operational procedure. These mild conditions are also suitable for gram-scale reactions and late-stage functionalizations of complex mols., including pharmaceuticals, N,N-ligands, and light-sensitive mols. In the experiment, the researchers used Ethyl oxalyl monochloride(cas: 4755-77-5Reference of Ethyl oxalyl monochloride)

Ethyl oxalyl monochloride(cas: 4755-77-5) belongs to acyl chlorides. In the laboratory, acyl chlorides are generally prepared by treating carboxylic acids with thionyl chloride (SOCl2). The reaction is catalyzed by dimethylformamide and other additives.Reference of Ethyl oxalyl monochloride

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

The author of 《Understanding the Role of Fluorination on the Interaction of Electrolytic Carbonates with Li+ through an Electronic Structure Approach》 were Kushwaha, Anoop Kumar; Sahoo, Mihir Ranjan; Nayak, Saroj Kumar. And the article was published in ChemistrySelect in 2019. Name: Vinylene carbonate The author mentioned the following in the article:

The donor-acceptor orbital interaction between the unoccupied orbital of Li+ and the lone pair of oxygen atoms in the carbonyl group of Li+-carbonate complexes shows significant decrease on fluorination. This has been investigated through MO formalism based d. functional theory. The fluorination process lowers the binding energy (reduced up to 13.8 kcal/mol), and widens the HOMO-LUMO gap (enhanced up to 0.7 eV), which is essential for achieving electrolytes with high potential window in Li-ion battery. Furthermore, the impact of fluorination on few critical factors has been observed, i. e. dipole moment (drastic enhancement), IR spectra (most affected C=O vibrational mode shows blue shift in the spectra) and Raman active mode (carbonyl group stretching mode doublet (νCO) shifted to higher frequency) which have been probed by vibrational frequency anal. In the experiment, the researchers used many compounds, for example, Vinylene carbonate(cas: 872-36-6Name: Vinylene carbonate)

Vinylene carbonate(cas: 872-36-6) belongs to esters. Alkyl carbonates find applications as solvents for lithium ion battery electrolytes and the use of high quality battery grade electrolytes having extremely low water (<10 ppm) and acid (<10 ppm) contents are critical for achieving high electrochemical performance.Name: Vinylene carbonate

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

In 2019,Polymer Chemistry included an article by Vrijsen, Jeroen H.; Osiro Medeiros, Camila; Gruber, Jonas; Junkers, Tanja. Computed Properties of C10H10O2. The article was titled 《Continuous flow synthesis of core cross-linked star polymers via photo-induced copper mediated polymerization》. The information in the text is summarized as follows:

A convenient method to synthesize core cross-linked star polymers via a continuous flow photopolymerization process is developed. Photo-induced copper mediated radical polymerization was employed for arm and star syntheses. The arms of the core cross-linked star polymers are composed of poly(Me acrylate) (with a Mn, arm of 2600 or 4700 g mol-1, Darm ≈ 1.12), and 1,4-butanediol diacrylate was used as the core cross-linker. Flow polymerization enables the rapid formation of star polymers (15-20 min, Mw, star flow = 170 400 g mol-1, 33 arms). Furthermore, a reactor cascade was built that combines arm and star syntheses without the isolation of the intermediate product between both reactor stages. In this way, the star polymer is formed (Mw, star = 156 500 g mol-1, 34 arms) in a one-pot fashion, yet under scalable conditions. Surface functionalized star polymers were obtained with similar mol. weights via alc.-functional initiators. Finally, a flow reactor setup is demonstrated that allows direct access to miktoarm star polymers. In there, two different arms are synthesized from photopolymerization in parallel and then simultaneously fed into a third reactor. The resulting miktoarm core cross-linked star polymers are composed of poly(Me acrylate) and poly(benzyl acrylate) arms (Mw, star = 189 300 g mol-1, 33 arms). The reactor cascade enables rapid star polymer formation in a continuous process (within 40 min, when reactor conditions are stable) without intermediate purification, improved illumination and facile upscaling. In the experiment, the researchers used many compounds, for example, Benzyl acrylate(cas: 2495-35-4Computed Properties of C10H10O2)

Benzyl acrylate(cas: 2495-35-4) has been used in preparation of high refractive index polyacrylates. Benzyl acrylate is used in the preparation of heptanoic acid benzyl ester. It is used to prepare polybenzylacrylate using azobisisobutyronitrile as initiator.Computed Properties of C10H10O2

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

In 2015,Yellol, Gorakh S.; Yellol, Jyoti G.; Kenche, Vijaya B.; Liu, Xiang Ming; Barnham, Kevin J.; Donaire, Antonio; Janiak, Christoph; Ruiz, Jose published 《Synthesis of 2-Pyridyl-benzimidazole Iridium(III), Ruthenium(II), and Platinum(II) Complexes. Study of the Activity as Inhibitors of Amyloid-β Aggregation and Neurotoxicity Evaluation》.Inorganic Chemistry published the findings.Recommanded Product: 329-59-9 The information in the text is summarized as follows:

The design of small mols. that can target the aggregation of Aβ as potential therapeutic agents for Alzheimer’s disease is an area of study that has attracted a lot of attention recently. The novel ligand Me 1-butyl-2-pyridyl-benzimidazole carboxylate was prepared for the synthesis of a series of new iridium(III), ruthenium(II), and platinum(II) 2-pyridyl-benzimidazole complexes. The crystal structure of the half-sandwich iridium(III) complex was established by X-ray diffraction. An arrangement of two cationic complexes in the unit cell is observed, and it seems to be organized by weak π···π interactions that are taking place between two symmetry-related benzimidazole ring systems. All new compounds inhibited aggregation of Aβ1-42 in vitro as shown by both thioflavin T fluorescence assay and transmission electron microscopy. Among them the Ir compound rescued the toxicity of Aβ1-42 in primary cortical neurons effectively. The results came from multiple reactions, including the reaction of Methyl 4-fluoro-3-nitrobenzoate(cas: 329-59-9Recommanded Product: 329-59-9)

Methyl 4-fluoro-3-nitrobenzoate(cas: 329-59-9) belongs to methyl benzoate. Methyl benzoate reacts at both the ring and the ester, depending on the substrate. Electrophiles attack the ring, illustrated by acid-catalysed nitration with nitric acid to give methyl 3-nitrobenzoate.Recommanded Product: 329-59-9

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

In 2012,Kotionova, Tatyana; Lee, Christopher; Miedziak, Peter J.; Dummer, Nicholas F.; Willock, David J.; Carley, Albert F.; Morgan, David J.; Knight, David W.; Taylor, Stuart H.; Hutchings, Graham J. published 《Oxidative Esterification of Homologous 1,3-Propanediols》.Catalysis Letters published the findings.Recommanded Product: Methyl 3-hydroxypropanoate The information in the text is summarized as follows:

Abstract: The oxidative esterification of a homologous series of diols (1,3-propanediol, 2-methyl-1,3-propanediol and 2,2-dimethyl-1,3-propanediol) with methanol has been investigated using titania-supported gold, palladium and gold-palladium catalysts using mol. oxygen. The gold-palladium catalysts showed the highest activity and 1,3-propanediol was the most reactive while the addnl. Me groups decreased the reactivity. However, it is possible to achieve high selectivity to Me 3-hydroxypropionate and 2-methyl-3-hydroxyisobutyrate by mono-oxidations In the experiment, the researchers used Methyl 3-hydroxypropanoate(cas: 6149-41-3Recommanded Product: Methyl 3-hydroxypropanoate)

Methyl 3-hydroxypropanoate(cas: 6149-41-3) belongs to esters with low molecular weight are commonly used as fragrances and found in essential oils and pheromones. 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: Methyl 3-hydroxypropanoate

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

Sun, Guo-Quan; Zhang, Wei; Liao, Li-Li; Li, Li; Nie, Zi-Hao; Wu, Jin-Gui; Zhang, Zhen; Yu, Da-Gang published their research in Nature Communications on December 31 ,2021. The article was titled 《Nickel-catalyzed electrochemical carboxylation of unactivated aryl and alkyl halides with CO2》.SDS of cas: 1877-71-0 The article contains the following contents:

A general and practical electro-reductive Ni-catalytic system, realizing the electrocatalytic carboxylation of unactivated aryl chlorides and alkyl bromides with CO2 were reported. A variety of unactivated aryl bromides, iodides and sulfonates can also undergo such a reaction smoothly. Notably, realized the catalytic electrochem. carboxylation of aryl (pseudo)halides with CO2 avoiding the use of sacrificial electrodes. Moreover, this sustainable and economic strategy with electron as the clean reductant features mild conditions, inexpensive catalyst, safe and cheap electrodes, good functional group tolerance and broad substrate scope. Mechanistic investigations indicated that the reaction might proceed via oxidative addition of aryl halides to Ni(0) complex, the reduction of aryl-Ni(II) adduct to the Ni(I) species and following carboxylation with CO2.3-(Methoxycarbonyl)benzoic acid(cas: 1877-71-0SDS of cas: 1877-71-0) was used in this study.

3-(Methoxycarbonyl)benzoic acid(cas: 1877-71-0) belongs to esters. They are important in biology, being one of the main classes of lipids and comprising the bulk of animal fats and vegetable oils.SDS of cas: 1877-71-0 They 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.

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

Ren, Shi-Chao; Yang, Xing; Mondal, Bivas; Mou, Chengli; Tian, Weiyi; Jin, Zhichao; Chi, Yonggui Robin published their research in Nature Communications on December 31 ,2022. The article was titled 《Carbene and photocatalyst-catalyzed decarboxylative radical coupling of carboxylic acids and acyl imidazoles to form ketones》.Name: 3-(Methoxycarbonyl)benzoic acid The article contains the following contents:

The carbene and photocatalyst co-catalyzed radical coupling of acyl electrophile and a radical precursor is emerging as attractive method for ketone synthesis. However, previous reports mainly limited to prefunctionalized radical precursors and two-component coupling. Herein, an N-heterocyclic carbene and photocatalyst catalyzed decarboxylative radical coupling of carboxylic acids and acyl imidazoles is disclosed, in which the carboxylic acids are directly used as radical precursors. The acyl imidazoles could also be generated in situ by reaction of a carboxylic acid with CDI thus furnishing a formally decarboxylative coupling of two carboxylic acids. In addition, the reaction is successfully extended to three-component coupling by using alkene as a third coupling partner via a radical relay process. The mild conditions, operational simplicity, and use of carboxylic acids as the reacting partners make our method a powerful strategy for construction of complex ketones from readily available starting materials, and late-stage modification of natural products and medicines. In the experiment, the researchers used 3-(Methoxycarbonyl)benzoic acid(cas: 1877-71-0Name: 3-(Methoxycarbonyl)benzoic acid)

3-(Methoxycarbonyl)benzoic acid(cas: 1877-71-0) belongs to esters. They are important in biology, being one of the main classes of lipids and comprising the bulk of animal fats and vegetable oils. They 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.Name: 3-(Methoxycarbonyl)benzoic acid

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

Reiners, I.; Wilken, J.; Martens, J. published their research in Tetrahedron: Asymmetry on December 31 ,1995. The article was titled 《Intramolecular vs. intermolecular induction in the diastereoselective catalytic reduction of enantiomerically pure ketones with borane in the presence of cyclic β-amino alcohols》.Electric Literature of C10H14ClNO2 The article contains the following contents:

Asym. reduction of various enantiomerically pure ketones was carried out by using oxazaborolidine catalysts with a variety of achiral and chiral ligands. The efficiency of chiral 1,2-amino alcs. as well as the effect of the stereogenic centers in the substrate on the catalytic asym. reduction were studied. The products obtained from (2S-trans)-5-methyl-2-(1-methylethyl)cyclohexanone (menthone) were (1R-endo)-1,7,7-trimethylbicyclo[2.2.1]heptan-2-ol [(+)-borneol] and (1R-exo)-1,7,7-trimethylbicyclo[2.2.1]heptan-2-ol [(-)-isoborneol]. The products from (1R)-1,7,7-trimethylbicyclo[2.2.1]heptan-2-one [(+)-camphor] were [1R-1α,2β,5α]-5-methyl-2-(1-methylethyl)cyclohexanol [(+)-neoisomenthol] and [(+)-neoisomenthol]. It was found that the corresponding secondary alcs. were obtained with extremely high stereoselectivities with the proper choice of chiral ligands although a considerably large double asym. induction was observed in some cases. The experimental process involved the reaction of H-Phg-OEt.HCl(cas: 59410-82-1Electric Literature of C10H14ClNO2)

H-Phg-OEt.HCl(cas: 59410-82-1) belongs to esters. Esters are more polar than ethers but less polar than alcohols. Electric Literature of C10H14ClNO2 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.

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