Esters-buliding-blocks

Barton, Derek H. R. published the artcileThe invention of radical reactions. Part XVIII. A convenient solution to the 1-carbon problem (R-CO₂H → R-¹³CO₂H), Application In Synthesis of 110-34-9, the publication is Tetrahedron (1988), 44(12), 3501-12, database is CAplus.

Radicals generated by photolysis (W light) of esters derived from N-hydroxy-2-thiopyridone react with electrophilic isocyanides PhCH₂CH₂NC and (in the presence of CF₃CO₂H)Me(CH₂)₄NC to give adducts of type R¹N:CRSC₅H₄N-2 (C₅H₄N-2 = 2-pyridyl). Convenient reaction procedures have been worked out to hydrolyze the adducts to amides of type RCONHR¹, from which the original acid RCO₂H can be regenerated under mild conditions. The three important acids oleic, linoleic and arachidonic have all given smooth reactions. In suitable examples, quant. evolution of CO₂ and incorporation of ¹³C without dilution have been demonstrated. This reaction sequence will be useful for the labeling in the carboxyl group of prostaglandins, leukotrienes, and the side chain carboxyls of peptides.

Tetrahedron published new progress about 110-34-9. 110-34-9 belongs to esters-buliding-blocks, auxiliary class Aliphatic hydrocarbon chain,Ester, name is Isobutyl palmitate, and the molecular formula is C20H40O2, Application In Synthesis of 110-34-9.

Referemce:
https://en.wikipedia.org/wiki/Ester,
Ester – an overview | ScienceDirect Topics

Naumov, Pance published the artcileStructure and Spectroscopy of Oxyluciferin, the Light Emitter of the Firefly Bioluminescence, Application In Synthesis of 19788-49-9, the publication is Journal of the American Chemical Society (2009), 131(32), 11590-11605, database is CAplus and MEDLINE.

The crystal structures of the pure, unsubstituted firefly emitter oxyluciferin (OxyLH₂) and its 5-Me analog (MOxyLH₂) were determined for the first time to reveal that both mols. exist as pure trans-enol forms, enol-OxyLH₂ and enol-MOxyLH₂, assembled as head-to-tail hydrogen-bonded dimers. Their steady-state absorption and emission spectra (in solution and in the solid state) and nanosecond time-resolved fluorescence decays (in solution) were recorded and assigned to the six possible trans chem. forms of the emitter and its anions. The spectra of the pure emitter were compared to its bioluminescence and fluorescence spectra when it is complexed with luciferase from the Japanese firefly (Luciola cruciata) and interpreted in terms of the intermol. interactions based on the structure of the emitter in the luciferase active site. The wavelengths of the emission spectral maxima of the six chem. forms of OxyLH₂ are generally in good agreement with the theor. predicted energies of the S-S₁ transitions and range from the blue to the red regions, while the resp. absorption maxima range from the UV to the green regions. It was confirmed that both neutral forms, phenol-enol and phenol-keto, are blue emitters, whereas the phenolate-enol form is yellow-green emitter. The phenol-enolate form, which probably only exists as a mixture with other species, and the phenolate-enolate dianion are yellow or orange emitters with close position of their emission bands. The phenolate-keto form always emits in the red region. The concentration ratio of the different chem. species in solutions of OxyLH₂ is determined by several factors which affect the intricate triple chem. equilibrium, most notably the pH, solvent polarity, hydrogen bonding, presence of addnl. ions, and π-π stacking. Due to the stabilization of the enol group of the 4-hydroxythiazole ring by hydrogen bonding to the proximate adenosine monophosphate, which according to the d. functional calculations is similar to that due to the dimerization of two enol mols. observed in the crystal, the phenolate ion of the enol tautomer, which is the predominant ground-state species within the narrow pH interval 7.44-8.14 in buffered aqueous solutions, is the most probable emitter of the yellow-green bioluminescence common for most wild-type luciferases. This conclusion is supported by the bioluminescence/fluorescence spectra and the NMR data, as well the crystal structures of OxyLH₂ and MOxyLH₂, where the conjugated acid (phenol) of the emitter exists as pure enol tautomer.

Journal of the American Chemical Society published new progress about 19788-49-9. 19788-49-9 belongs to esters-buliding-blocks, auxiliary class Thiol,Aliphatic hydrocarbon chain,Ester, name is Ethyl 2-mercaptopropanoate, and the molecular formula is C5H10O2S, Application In Synthesis of 19788-49-9.

Referemce:
https://en.wikipedia.org/wiki/Ester,
Ester – an overview | ScienceDirect Topics

Sower, L. L. published the artcileRecovery of Eucosma sonomana (Lepidoptera: Tortricidae) populations after mating-disruption treatments, Quality Control of 16974-11-1, the publication is Journal of Economic Entomology (1986), 79(6), 1645-7, database is CAplus.

Where damage by western pine shoot borers (E. sonomana) was initially reduced 80% by pheromone mating-disruption treatments, damage began to increase 1-2 generations (years) after treatment. Most benefits of treatment were realized within 2 and, at most, 3 generations. Plots treated in successive years maintained reduced damage levels.

Journal of Economic Entomology published new progress about 16974-11-1. 16974-11-1 belongs to esters-buliding-blocks, auxiliary class Aliphatic Chain, name is (Z)-Dodec-9-en-1-yl acetate, and the molecular formula is C8H10O2, Quality Control of 16974-11-1.

Referemce:
https://en.wikipedia.org/wiki/Ester,
Ester – an overview | ScienceDirect Topics

Vaton-Chanvrier, L. published the artcileChiral recognition of binaphthyl derivatives: a chiral recognition model on the basis of chromatography, spectroscopy, and molecular mechanistic calculations for the enantioseparation of 1,1′-binaphthyl derivatives on cholic acid-bonded stationary phases, Recommanded Product: (R)-[1,1′-Binaphthalene]-2,2′-diyl bis(trifluoromethanesulfonate), the publication is Chirality (2001), 13(10), 668-674, database is CAplus and MEDLINE.

In an effort to elucidate the mechanism of chiral discrimination of cholic acid-based stationary phases, the enantiomeric recognition ability of six chiral stationary phases (CSPs), prepared from differently substituted cholic acid derivatives, was evaluated in normal phase HPLC with 1,1′-binaphthyl compounds The influence of structural variations of analytes on retention and enantioselectivity was studied. Particularly high values of enantioselectivity were observed for the binaphthol enantiomers on a CSP prepared from the allyl 7α,12α-dihydroxy-3α-phenylcarbamoyloxy-5β-cholan-24-oate. The complexes of this chiral selector with both enantiomers of binaphthol were studied as models for the interactions responsible for the enantioseparation with the cholic acid-based stationary phases. The 1:1 stoichiometry of the complex in solution was determined by UV titration The chiral selector dissolved in chloroform exhibited a chiral discrimination for the binaphthol in ¹H and ¹³C NMR spectroscopies. Some aromatic proton and carbon resonances of binaphthol were clearly separated into a pair of peaks due to enantiomers in the presence of the chiral selector. Also, from mol. mechanics calculation, a chiral discrimination model is proposed which nicely explains the relevant chromatog. behavior of the 1,1′-binaphthyl derivatives

Chirality published new progress about 126613-06-7. 126613-06-7 belongs to esters-buliding-blocks, auxiliary class Chiral Diphenols, name is (R)-[1,1′-Binaphthalene]-2,2′-diyl bis(trifluoromethanesulfonate), and the molecular formula is C9H7N5O, Recommanded Product: (R)-[1,1′-Binaphthalene]-2,2′-diyl bis(trifluoromethanesulfonate).

Referemce:
https://en.wikipedia.org/wiki/Ester,
Ester – an overview | ScienceDirect Topics

Riadi, Yassine published the artcileEfficient novel eutectic-mixture-mediated synthesis of benzoxazole-linked pyrrolidin-2-one heterocycles, COA of Formula: C7H10O4, the publication is Journal of Molecular Liquids (2021), 115011, database is CAplus.

In this study, new benzoxazole-linked pyrrolidinone heterocyclic compounds I [R = H, 2-Me, 3-Cl-4-F, etc.] were synthesized by an eco-efficient strategy using substituted benzylamines and 2-aminophenol under ultrasonic irradiation in the presence of a newly designed metal-free deep eutectic solvent (DES). This DES was prepared by using a eutectic mixture of urea and a synthesized glycine-derived ionic liquid X-ray diffraction and IR spectroscopy were employed to investigate the structure of the ionic liquid and characterize the DES, resp. This method exhibited key advantages of high productivity, a short reaction time, and simple processing. Moreover, this DES was easily separated from reaction mixtures and could be recycled for multiple reactions.

Journal of Molecular Liquids published new progress about 617-52-7. 617-52-7 belongs to esters-buliding-blocks, auxiliary class Alkenyl,Aliphatic hydrocarbon chain,Ester, name is Dimethyl itaconate, and the molecular formula is C7H10O4, COA of Formula: C7H10O4.

Referemce:
https://en.wikipedia.org/wiki/Ester,
Ester – an overview | ScienceDirect Topics

Geesi, Mohammed H. published the artcileMetal-doped TiO₂ nanocatalysts in an MX₂/urea mixture for the synthesis of benzothiazoles bearing substituted pyrrolidin-2-ones: enhanced catalytic performance and antibacterial activity, SDS of cas: 617-52-7, the publication is Journal of Environmental Chemical Engineering (2021), 9(4), 105344, database is CAplus.

Pyrrolidinone derivatives I (R = Ph, 2-MeC₆H₄, 4-HOC₆H₄, 3-Cl-4-FC₆H₃, etc.) were synthesized by reacting various arylamines RNH₂ with di-Me itaconate using water as the solvent in a microwave. The obtained pyrrolidinone derivatives I were further reacted with 2-aminothiophenol under microwave irradiation with the assistance of a deep eutectic mixture (CuCl₂ or NiCl₂/urea) and Cu- or Ni-doped TiO₂ nanoparticles to afford the final derivatives II incorporating both pyrrolidin-2-one and benzothiazole rings. To determine the optimum reaction conditions, the effects of temperature, solvent nature, and reaction time were investigated. Under the optimal operation conditions, high reaction yields were achieved. The developed strategy exhibited advantages of a short reaction time, eco-friendliness, and high productivity. Finally, the obtained derivatives II were examined in terms of their antibacterial potential against selected Gram-neg. and Gram-pos. bacterial strains: all the derivatives II, except for II (R = 4-MeOC₆H₄), exhibited activity against the tested bacteria.

Journal of Environmental Chemical Engineering published new progress about 617-52-7. 617-52-7 belongs to esters-buliding-blocks, auxiliary class Alkenyl,Aliphatic hydrocarbon chain,Ester, name is Dimethyl itaconate, and the molecular formula is C7H10O4, SDS of cas: 617-52-7.

Referemce:
https://en.wikipedia.org/wiki/Ester,
Ester – an overview | ScienceDirect Topics

Park, Haesun published the artcileEvolution of drug delivery systems: From 1950 to 2020 and beyond, Related Products of esters-buliding-blocks, the publication is Journal of Controlled Release (2022), 53-65, database is CAplus and MEDLINE.

Modern drug delivery technol. began in 1952 with the advent of the Spansule sustained-release capsule technol., which can deliver a drug for 12 h after oral administration through an initial immediate dose followed by the remaining released gradually. Until the 1980s, oral and transdermal formulations providing therapeutic durations up to 24 h for small mols. dominated the drug delivery field and the market. The introduction of Lupron Depot in 1989 opened the door for long-acting injectables and implantables, extending the drug delivery duration from days to months and occasionally years. Notably, the new technologies allowed long-term delivery of peptide and protein drugs, although limited to parenteral administration. The introduction of the first PEGylated protein, Adagen, in 1990 marked the new era of PEGylation, resulting in Doxil (doxorubicin in PEGylated liposome) in 1995, Movantik (PEGylated naloxone – naloxegol) in 2014, and Onpattro (Patisiran – siRNA in PEGylated lipid nanoparticle) in 2018. Drug-polymer complexes were introduced, e.g., InFed (iron-dextran complex injection) in 1974 and Abraxane (paclitaxel-albumin complex) in 2005. In 2000, both Mylotarg (antibody-drug conjugate – gemtuzumab ozogamicin) and Rapamune (sirolimus nanocrystal formulation) were introduced. The year 2000 also marked the launching of the National Nanotechnol. Initiative by the U. S. government, which was soon followed by the rest of the world. Extensive work on nanomedicine, particularly formulations designed to escape from endosomes after being taken by tumor cells, along with PEGylation technol., ultimately resulted in the timely development of lipid nanoparticle formulations for COVID-19 vaccine delivery in 2020. While the advances in drug delivery technologies for the last seven decades are breathtaking, they are only the tip of an iceberg of technologies that have yet to be utilized in an approved formulation or even to be discovered. As life expectancy continues to increase, more people require long-term care for various diseases. Filling the current and future unmet needs requires innovative drug delivery technologies to overcome age-old familiar hurdles, e.g., improving water-solubility of poorly soluble drugs, overcoming biol. barriers, and developing more efficient long-acting depot formulations. The lessons learned from the past are essential assets for developing future drug delivery technologies implemented into products. As the development of COVID-19 vaccines demonstrated, meeting the unforeseen crisis of the uncertain future requires continuous cumulation of failures (as learning experiences), knowledge, and technologies. Conscious efforts of supporting diversified research topics in the drug delivery field are urgently needed more than ever.

Journal of Controlled Release published new progress about 624-49-7. 624-49-7 belongs to esters-buliding-blocks, auxiliary class Inhibitor,Natural product, name is Dimethyl fumarate, and the molecular formula is C6H8O4, Related Products of esters-buliding-blocks.

Referemce:
https://en.wikipedia.org/wiki/Ester,
Ester – an overview | ScienceDirect Topics

Balanuca, Brindusa published the artcileExploring the potential of inexpensive high oleic sunflower oil for new polymeric architectures, Formula: C11H15NO2, the publication is Polymers for Advanced Technologies (2021), 32(4), 1813-1821, database is CAplus.

Bicomponent polymeric architectures were fabricated through visible-light polymerization starting from methacrylated and PEGylated high oleic sunflower oil (HO-SFO) monomers and compatible polyethylene glycol dimethacrylate (PEG-DMA) capable of swelling in biol. simulated fluid. Conversion of the methacryl moieties in the photo-polymerization reactions was monitored by FTIR spectrometry and also gel fraction measurements. The amount of PEG-DMA co-reactant and PEG units grafted on the HO-SFO backbone were found to directly influence the key properties of the oil-based polymers. DSC measurements proved that higher content of PEG-DMA (1:1wt, related to HO-SFO monomer) influence the crystallinity degree, favoring also the increase of PBS absorption capacity. PEG chains from the HO-SFO structure acts as mediator for the hydrophobic and hydrophilic components, influencing the system mobility, networks arrangement, affording the higher degree for PBS absorption (almost 70% after 50 days of immersion). For all the studied systems two-phase absorption process was observed and assigned to the esters hydrolysis, yielding new -COOH and -OH groups, XPS and SEM confirming this hypothesis. Polymers degradation during PBS immersion conduce to the elimination of PEG oligomers and unreacted methacryl moieties from the fatty acids, by diffusion in the swelling medium, phenomenon supported by detectable architectural changes from the SEM images.

Polymers for Advanced Technologies published new progress about 10287-53-3. 10287-53-3 belongs to esters-buliding-blocks, auxiliary class Amine,Benzene,Ester, name is Ethyl 4-dimethylaminobenzoate, and the molecular formula is C11H15NO2, Formula: C11H15NO2.

Referemce:
https://en.wikipedia.org/wiki/Ester,
Ester – an overview | ScienceDirect Topics

Kuriyama, Akira published the artcileLiving radical polymerization of methyl methacrylate with a tetrafunctional photoiniferter: synthesis of a star polymer, Related Products of esters-buliding-blocks, the publication is Polymer Journal (Tokyo, Japan) (1984), 16(6), 511-14, database is CAplus.

The radical polymerization of Me methacrylate is described using 1,2,4,5-tetrakis(N,N-diethyldithiocarbamylmethyl)benzene  [92687-20-2] as a tetrafunctional photoiniferter and compared with that using benzyl N,N-diethyldithiocarbamate  [3052-61-7] and p-xylylene bis(N,N-diethyldithiocarbamate) [89964-93-2]. Fractionation results confirmed the formation of star polymers.

Polymer Journal (Tokyo, Japan) published new progress about 3052-61-7. 3052-61-7 belongs to esters-buliding-blocks, auxiliary class Amine,Benzene,Amide, name is Benzyl diethylcarbamodithioate, and the molecular formula is C12H17NS2, Related Products of esters-buliding-blocks.

Referemce:
https://en.wikipedia.org/wiki/Ester,
Ester – an overview | ScienceDirect Topics

Bozejewicz, Daria published the artcile2,6-bis((benzoyl-R)amino)pyridine (R = H, 4-Me, and 4-NMe2) derivatives for the removal of Cu(II), Ni(II), Co(II), and Zn(II) ions from aqueous solutions in classic solvent extraction and a membrane extraction, Recommanded Product: Ethyl 4-dimethylaminobenzoate, the publication is Membranes (Basel, Switzerland) (2021), 11(4), 233, database is CAplus and MEDLINE.

In this paper, the application of new substituted 2,6-bis((benzoyl-R)amino)pyridine (R = H, 4-Me, and 4-NMe₂) derivatives for the recovery of copper(II), nickel(II), cobalt(II), and zinc(II) ions from aqueous solutions was described. The structures of the synthesized compounds were confirmed by NMR spectroscopy (NMR), electrospray ionization high-resolution mass spectrometry (ESI HRMS), and tandem mass spectrometry methods (HCD MS/MS). Three different derivatives of 2,6-bis((benzoyl-R)amino)pyridine were used as carriers in membrane processes and as extractants in classic solvent extraction In each case, the single derivative recovery was carried out on a model solution that contained only one type of metal ions. Spectrophotometry studies were performed to determine the stability constants of the complexes formed by the synthesized species with analyzed metals ions. The results obtained indicate that the synthesized compounds form stable complexes with Cu(II), Ni(II), Co(II), and Zn(II) ions and can be used in both types of studied recovery processes. However, the effectiveness of the synthesized compounds in the recovery of metal ions depends both on the structure of compounds and properties of metals as well as on their concentration

Membranes (Basel, Switzerland) published new progress about 10287-53-3. 10287-53-3 belongs to esters-buliding-blocks, auxiliary class Amine,Benzene,Ester, name is Ethyl 4-dimethylaminobenzoate, and the molecular formula is C11H15NO2, Recommanded Product: Ethyl 4-dimethylaminobenzoate.

Referemce:
https://en.wikipedia.org/wiki/Ester,
Ester – an overview | ScienceDirect Topics