Esters-buliding-blocks

Asano, Akiko published the artcileAscidiacyclamides containing oxazoline and thiazole motifs assume square conformations and show high cytotoxicity, Recommanded Product: (R)-tert-Butyl (3-methyl-1-oxobutan-2-yl)carbamate, the publication is Journal of Peptide Science (2018), 24(10), n/a, database is CAplus and MEDLINE.

Four cyclic octapeptides were designed from ascidiacyclamide [cyclo(-Ile-Oxz-D-Val- Thz-)₂] (ASC, 1) to investigate the effects of oxazoline (Oxz) and thiazole (Thz) rings on the structures and cytotoxicities of the peptides. Cyclo(-Ile-Thz-D-Val-Oxz-)₂ (2) had the same number of Oxz and Thz rings as ASC, but the ring positions were switched. Cyclo(-Ile-Oxz-D-Val-Thz-Ile-Thz-D-Val-Thz-) (3) and cyclo(-Ile-Thz-D-Val-Oxz-Ile-Thz-D-Val-Thz-) (4) contained one Oxz and three Thz rings within the mol. All Oxz rings were substituted with Thz in cyclo(-Ile-Thz-D-Val-Thz-)₂ (5). These analogs had new Oxz and Thz blocks forming the 24-membered ring. Based on CD spectra and X-ray diffraction analyses, the structures of all four analogs were classified as square ASC forms. But the structures of 2 and 5 differed from the original square form of 1, and they showed no cytotoxicity. The structure of 3 was very similar to that of 1, and 3 showed 10 times greater cytotoxicity than 1. Although no definite structure of 4 was obtained, it showed three times greater cytotoxicity than 1. It appears that the position and number of Oxz residues are essential determinants in the structure-cytotoxicity relationship of ASC analogs.

Journal of Peptide Science published new progress about 106391-88-2. 106391-88-2 belongs to esters-buliding-blocks, auxiliary class Amine,Aliphatic hydrocarbon chain,Amide,Aldehyde, name is (R)-tert-Butyl (3-methyl-1-oxobutan-2-yl)carbamate, and the molecular formula is C10H19NO3, Recommanded Product: (R)-tert-Butyl (3-methyl-1-oxobutan-2-yl)carbamate.

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

Tong, Zai-Zai published the artcileHierarchical self-assembly, photo-responsive phase behavior and variable tensile property of azobenzene-containing ABA triblock copolymers, HPLC of Formula: 135529-02-1, the publication is RSC Advances (2015), 5(6), 4030-4040, database is CAplus.

A series of triblock copolymers with liquid crystalline (LC) poly{6-[4-(4-methoxyphenylazo)phenoxy]hexyl methacrylate} (PMMAZO) as the end blocks and rubbery poly(Bu acrylate) (PnBA) as the midblock were synthesized. The effect of the interplay between the LC ordering and microphase separation on the hierarchical assembly of the triblock copolymers was studied. It is found that microphase separation at a larger scale can affect the LC ordering at a smaller scale, such as the stacking of the LC moieties, LC temperature and the domain size of the LC phase. On the other hand, alteration of the LC ordering, such as isotropization and smetic-to-nematic transition, may also lead to an order-order transition (OOT) or change in the long period of the microphase-separated structure. UV light can trigger the isomerization of the azobenzene LC moieties, which can be further amplified and exerts an effect on the microphase separation behavior, including the regularity of the microphase-separated structure and the OOT. The triblock copolymers also exhibit light-variable tensile properties. The results reveal that the phase behavior and mech. properties of this type of triblock copolymer can be readily regulated by light, thus it may be used as smart and functional thermoplastic elastomer.

RSC Advances published new progress about 135529-02-1. 135529-02-1 belongs to esters-buliding-blocks, auxiliary class azo,Alkenyl,Benzene,Ester,Ether, name is 6-(4-((4-Methoxyphenyl)diazenyl)phenoxy)hexyl methacrylate, and the molecular formula is C7H6Cl2O, HPLC of Formula: 135529-02-1.

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

Geng, Xiao published the artcileVisible-Light-Driven Multicomponent Cyclization by Trapping a 1,3-Vinylimine Ion Intermediate: A Direct Approach to Pyrimido[1,2-b]indazole Derivatives, Category: esters-buliding-blocks, the publication is Organic Letters (2021), 23(21), 8343-8347, database is CAplus and MEDLINE.

Here a novel visible-light-driven three-component cyclization by trapping an 1,3-vinylimine ion intermediate for the direct synthesis of pyrimido[1,2-b]indazole derivatives from bromodifluoroacetic acid derivatives, enaminones, and 3-aminoindazoles under mild conditions was developed. Notably, the robust methodol. provided a valuable opportunity for the introduction of aliphatic substituents and enables good compatibility of complex bioactive mols. Furthermore, this was the first example of photoinduced multicomponent reaction by employing bromodifluoroacetic acid derivatives as a C1-synthon.

Organic Letters published new progress about 924-99-2. 924-99-2 belongs to esters-buliding-blocks, auxiliary class Alkenyl,Amine,Aliphatic hydrocarbon chain,Ester, name is Ethyl 3-(dimethylamino)acrylate, and the molecular formula is C7H13NO2, Category: esters-buliding-blocks.

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

Lu, Deli published the artcileBiomass-derived dibasic acids to diesters with inorganic ligand-supported catalyst: synthesis, optimization, characterization, Formula: C8H14O4, the publication is Research on Chemical Intermediates (2022), 48(1), 321-337, database is CAplus.

Several attempts have been made to obtain aliphatic dicarboxylic diesters from esterification reaction to develop the biomass-derived platform mols. and green manufacturing processes. In this paper, Na₃(H₂O)₆[AlMo₆O₁₈(OH)₆], an Anderson-type polyoxometalate, firstly, was reported as a catalyst for diester synthesis from dicarboxylic acid to diester which showed an well productivity and selectivity characterized by ¹H and ¹³C. Response surface methodol. (RSM) integrated with the desirability function approach was used to determine the best operative conditions, and the optimal reaction parameters for maximum di-Pr succinate yield (77 ± 2.5%) were identified as 1.19 mol.% catalyst loading, 4.9:1 propanol/succinic acid ratio, 113°C, and 9.6 h. Three batches of tests were carried for catalyst recycling with 78-75% yield even after 6 cycles of esterification. In addition, the substrate carbon chain was increased for investigation of substrate scope achieving satisfactory results and all products were characterized by ¹H and ¹³C NMR spectroscopy.

Research on Chemical Intermediates published new progress about 627-93-0. 627-93-0 belongs to esters-buliding-blocks, auxiliary class Ploymers, name is Dimethyl adipate, and the molecular formula is C8H14O4, Formula: C8H14O4.

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

Zhang, Qingyu published the artcileAmphiphilic indoles as efficient phase-transfer green catalysts for bromination in water, COA of Formula: C10H10O2, the publication is ChemSusChem (2022), 15(12), e202200574, database is CAplus and MEDLINE.

Brominated compounds are important, but they are usually prepared in organic solvents. Here, efficient amphiphilic indole-based phase-transfer organocatalysts were developed for environmentally benign bromination reactions in water. As test reactions, hydroxybromination of olefins and aromatic bromination could be conducted in a greener and more sustainable manner compared with methods using organic solvents, producing the corresponding bromides in good yields. Some pure products could be obtained without column chromatog.

ChemSusChem published new progress about 103-26-4. 103-26-4 belongs to esters-buliding-blocks, auxiliary class Alkenyl,Benzene,Ester,Protease,Tyrosinase,Natural product, name is Methyl 3-phenyl-2-propenoate, and the molecular formula is C12H16N2O2, COA of Formula: C10H10O2.

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

Li, Lige published the artcileWeighted gene co-expression network analysis revealed the synthesis of aromatic compounds in Dendrobium catenatum, Product Details of C10H10O2, the publication is Industrial Crops and Products (2022), 114668, database is CAplus.

Aromatic compounds in Dendrobium catenatum could affect brewing quality. Me jasmonate (MeJA) treatment enhances the content of aromatic compounds in D. catenatum, improving the wine quality in brewing industry and medicinal value. In this study, two D. catenatum genotypes, A6 and B1, were used to investigate the effect of MeJA treatment on aromatic compounds A total of 52 aromatic metabolites were identified using metabolome technique. Based on RNA-seq, weighted gene co-expression network anal. (WGCNA) of 16, 841 highly expressed transcripts uncovered black, cyan and turquoise modules that are significantly associated with the variation of aromatic compounds These results reveal the changes of aromatic metabolites during MeJA treatment and provide insight into the biosynthesis mechanism of aromatic compounds in D. catenatum, which could be conducive to the synthesis of active bioactive compounds and their use as industrial byproducts.

Industrial Crops and Products published new progress about 103-26-4. 103-26-4 belongs to esters-buliding-blocks, auxiliary class Alkenyl,Benzene,Ester,Protease,Tyrosinase,Natural product, name is Methyl 3-phenyl-2-propenoate, and the molecular formula is C10H10O2, Product Details of C10H10O2.

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

Chen, Feng published the artcilePhotoredox-Catalyzed Addition of Dibromofluoromethane to Alkenes: Direct Synthesis of 1-Bromo-1-fluoroalkanes, COA of Formula: C12H14O2, the publication is Organic Letters (2021), 23(6), 2364-2369, database is CAplus and MEDLINE.

Reported herein is a direct and efficient route to 1-bromo-1-fluoroalkanes through the reaction of unactivated alkenes with dibromofluoromethane under photoredox catalysis. The key to the success of these addition reactions is the employment of a suitable photoredox catalyst. In particular, hydro- and bromo-bromofluoromethylated products were chemoselectively formed using THF and DMF/H₂O as solvents, resp. Furthermore, the synthetic application of the prepared 1-bromo-1-fluoroalkanes has been demonstrated by their transformation into a variety of fluorine-containing compounds

Organic Letters published new progress about 5205-11-8. 5205-11-8 belongs to esters-buliding-blocks, auxiliary class Alkenyl,Benzene,Ester, name is 3-Methylbut-2-en-1-yl benzoate, and the molecular formula is C12H14O2, COA of Formula: C12H14O2.

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

Liu, Huijing published the artcileSolvatochromic probe performance enhancement via regulation of excited state structures, SDS of cas: 126613-06-7, the publication is Physical Chemistry Chemical Physics (2016), 18(36), 25210-25220, database is CAplus and MEDLINE.

A new fluorescent conjugate (PNBD) with a structure of D-π-A was designed and synthesized, where the donor (D), the acceptor (A) and the bridge (π) are naphthalyl, dicyanovinyl and phenylethynyl-phenylethynyl, resp. To improve the solubility of the conjugate, two long alkyl chains were introduced as substituents of the central aromatic ring. Spectroscopic studies demonstrated that PNBD is a strongly solvatochromic probe which is characterized by a large molar absorption coefficient (>32 000 cm^-1 M^-1), long wavelength absorption (>410 nm), large solvatochromic emission range (470-650 nm), high photochem. stability, and good solubility in common organic solvents. The fluorescent quantum yield of PNBD is limited in some polar solvents due to dual emission, a phenomenon ascribed to radiative decay from a higher excited singlet state. To eliminate dual emission, a covalently bound dimer (BPNBD) of PNBD characterized by weak vibronic coupling, was designed and synthesized. The dimer constituents are linked by a single bond between the naphthalyl moieties of the two PNBD monomers. As expected, BPNBD maintains almost all the strong points of the monomer, exhibits a substantial increase in fluorescence quantum yield, and eliminates dual emission by facilitating efficient internal conversion. Importantly, the use of PNBD and BPNBD in concert provides unprecedented discrimination among solvents of similar structures, such as (CH₂Cl₂, CHCl₃, CCl₄), (Et ether, THF, dioxane), or (methanol, ethanol, n-propanol, n-butanol, n-pentanol, n-hexanol, n-heptanol, n-octanol, n-decanol), allowing rapid and selective visual identification.

Physical Chemistry Chemical Physics 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 C22H12F6O6S2, SDS of cas: 126613-06-7.

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

Wang, Jing-Wen published the artcileDegradation of dimethyl phthalate esters by a filamentous fungus Aspergillus versicolor isolated from deep-sea sediments, Synthetic Route of 1877-71-0, the publication is Botanica Marina (2017), 60(3), 351-359, database is CAplus.

Di-Me phthalate esters (DMPEs), which belong to phthalate esters (PAEs), are widely distributed environmental pollutants with endocrine-disrupting toxicity. The present study focused on a filamentous fungus capable of degrading DMPEs isolated from deep-sea sediments of the Indian Ocean at a water depth of 3300 m using an enrichment culture technique. The filamentous fungus was identified as Aspergillus versicolor IR-M4 based on internal transcribed spacer gene sequence anal. The degradation pathways of three isomers of DMPEs [dimethyl phthalate (DMP), di-Me isophthalate (DMI) and di-Me terephthalate (DMT)] were investigated with this marine fungus. The results showed that A. versicolor IR-M4 was able to degrade DMI to monomethyl isophthalate (MMI) from an initial concentration of 21.52 mg l^-1 to undetectable in 2 days of incubation, but without the ability for further degradation of MMI. The marine fungus also conducted sequential cleavage of the ester bonds of DMT to terephthalic acid (TA) via monomethyl terephthalate, and TA was the final end product and was resistant to further metabolism However, this marine fungus was not able to degrade DMP. The different metabolic pathways of the three DMPE isomers by the fungus suggest that the phthalate esterases produced by A. versicolor IR-M4 have a very high substrate specificity for DMPEs and monomethyl phthalate esters (MMPEs).

Botanica Marina published new progress about 1877-71-0. 1877-71-0 belongs to esters-buliding-blocks, auxiliary class Carboxylic acid,Benzene,Ester, name is 3-(Methoxycarbonyl)benzoic acid, and the molecular formula is C12H10FeO4, Synthetic Route of 1877-71-0.

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

Zhang, Mengxin published the artcileA composite polymer of polystyrene coated with poly(4-vinylpyridine) as a sorbent for the extraction of synthetic dyes from foodstuffs, SDS of cas: 3052-61-7, the publication is Analytical Methods (2020), 12(24), 3156-3163, database is CAplus and MEDLINE.

A poly(St-co-EGDMA)@poly(4-vinylpyridine-co-EGDMA) composite polymer was synthesized by precipitation reversible addition-fragmentation chain transfer (RAFT) polymerization The polymer was investigated as a sorbent for extraction of synthetic food dyes: ponceau 4R, tartrazine, sunset yellow, brilliant blue and erythrosine from soft drinks. The morphol. and composition of the polymer were characterized and confirmed resp. by SEM and Fourier-transform IR spectroscopy. The pH dependence experiment revealed that the adsorption of food dyes by the polymer was pH dependent and the maximum adsorption was achieved at pH 3. Adsorption between the polymer and the dyes was mainly due to electrostatic interaction. Under the optimized pH conditions, the polymer was saturated with the dye solutions at a concentration of about 200μg mL^-1 and exhibited a maximum adsorption capacity of 9μg mg^-1. The values were higher than those for polyamide, a sorbent used in the standard method. The recovery from the real samples of the three spiked concentrations 10, 50 and 100μg mL^-1 was resp. within the ranges of 83.2-107.2%, 94.5-110.7% and 79.2-111.5%, with a SD within ±4%. The sorbent could be reused more than 10 times with a recovery higher than 80%. The small volume requirement of the sample and sorbent during the sample pre-treatment, indicated that poly(St-co-EGDMA)@poly(4-vinylpyridine-co-EGDMA) was a potential material for food dye extraction in an environment-friendly and economical manner.

Analytical Methods 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 C8H5IO, SDS of cas: 3052-61-7.

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