Category: ethers-buliding-blocks

Amaro, Ana L. published the artcileMultitrait analysis of fresh-cut cantaloupe melon enables discrimination between storage times and temperatures and identifies potential markers for quality assessments, Application In Synthesis of 2944-47-0, the publication is Food Chemistry (2018), 222-231, database is CAplus and MEDLINE.

Fresh-cut cantaloupe melon is valued for its aroma but is highly perishable. Temperature of storage (typically 0-5 °C) is critical for maintaining fresh-cut melon quality, but often reaches 10 °C during transportation and in retail outlets. A comparison amongst 0, 5 and 10 °C storage temperatures for fresh-cut melon over 14 days reveals that storage at 0 °C is optimal for avoiding increases in microbial load and loss of vitamin C especially at later time points. However, higher temperatures maintain better the balance of esters (acetate vs. non-acetate) and phenolic content. The whole volatile organic compound (VOC) profile can be used to discriminate both time and temperature effects especially at earlier time points. Potential VOC markers for changes in vitamin C from day 0 to day 6 of storage (3-Me butane nitrile) and temperature (limonene) are identified through a multi-trait anal.

Food Chemistry published new progress about 2944-47-0. 2944-47-0 belongs to ethers-buliding-blocks, auxiliary class Benzene,Ether, name is 2-Isopropylanisole, and the molecular formula is C10H14O, Application In Synthesis of 2944-47-0.

Referemce:
https://en.wikipedia.org/wiki/Ether,
Ether | (C2H5)2O – PubChem

Kreutzer, Adam G. published the artcileA Hexamer of a Peptide Derived from Aβ_16-36, Related Products of ethers-buliding-blocks, the publication is Biochemistry (2017), 56(45), 6061-6071, database is CAplus and MEDLINE.

The absence of high-resolution structures of amyloid oligomers constitutes a major gap in our understanding of amyloid diseases. Increasing evidence indicates that oligomers of the β-amyloid peptide Aβ are especially important in the progression of Alzheimer’s disease. In many Aβ oligomers, the Aβ monomer components are thought to adopt a β-hairpin conformation. This paper describes the design and study of a macrocyclic β-hairpin peptide derived from Aβ16-36. SDS-PAGE and size exclusion chromatog. studies show that the Aβ16-36 β-hairpin peptide assembles in solution to form hexamers, trimers, and dimers. X-ray crystallog. reveals that the peptide assembles to form a hexamer in the crystal state and that the hexamer is composed of dimers and trimers. LDH release assays show that the oligomers formed by the Aβ16-36 β-hairpin peptide are toxic toward neuronally derived SH-SY5Y cells. Replica-exchange mol. dynamics (REMD) demonstrates that the hexamer can accommodate full-length Aβ. These findings expand our understanding of the structure, solution-phase behavior, and biol. activity of Aβ oligomers, and may offer insights into the mol. basis of Alzheimer’s disease.

Biochemistry published new progress about 77128-73-5. 77128-73-5 belongs to ethers-buliding-blocks, auxiliary class Inhibitor, name is (S)-2-((((9H-Fluoren-9-yl)methoxy)carbonyl)(methyl)amino)-3-phenylpropanoic acid, and the molecular formula is C25H23NO4, Related Products of ethers-buliding-blocks.

Referemce:
https://en.wikipedia.org/wiki/Ether,
Ether | (C2H5)2O – PubChem

Tal-Gan, Yftah published the artcileN-Methyl and peptoid scans of an autoinducing peptide reveal new structural features required for inhibition and activation of AgrC quorum sensing receptors in Staphylococcus aureus, COA of Formula: C25H23NO4, the publication is Chemical Communications (Cambridge, United Kingdom) (2014), 50(23), 3000-3003, database is CAplus and MEDLINE.

We report the first N-Me and peptoid residue scans of a full-length autoinducing peptide (AIP), AIP-III, used by Staphylococcus aureus for quorum sensing (QS). Biol. evaluation of these AIP-III analogs uncovered new features of the AIP-III scaffold that can be tuned to develop chem. probes of QS in all four groups of S. aureus (I-IV).

Chemical Communications (Cambridge, United Kingdom) published new progress about 77128-73-5. 77128-73-5 belongs to ethers-buliding-blocks, auxiliary class Inhibitor, name is (S)-2-((((9H-Fluoren-9-yl)methoxy)carbonyl)(methyl)amino)-3-phenylpropanoic acid, and the molecular formula is C4H11NO, COA of Formula: C25H23NO4.

Referemce:
https://en.wikipedia.org/wiki/Ether,
Ether | (C2H5)2O – PubChem

Vracko, M. published the artcileComparison of predictions of developmental toxicity for compounds of solvent data set, Safety of 2-Methoxypropan-1-ol, the publication is SAR and QSAR in Environmental Research (2022), 33(1), 35-48, database is CAplus and MEDLINE.

We have considered a series of 235 compounds tech. classified as solvents. Chem., they belong to different classes. Their potential developmental toxicity was evaluated using two models available on platform VEGA HUB; model CAESAR and the Developmental/ Reproductive Toxicity library (PG) model. Models provide beside the prediction of developmental toxicity addnl. information on similar compounds from models training sets. In the report, first, we compare the predictions. Second, the sets of similar compounds have been used to implement the clustering scheme. The Kohonen artificial neural network method has been applied as a clustering method. The clusters obtained have been discussed for both models.

SAR and QSAR in Environmental Research published new progress about 1589-47-5. 1589-47-5 belongs to ethers-buliding-blocks, auxiliary class Aliphatic hydrocarbon chain,Alcohol,Ether, name is 2-Methoxypropan-1-ol, and the molecular formula is C8H5F3N4, Safety of 2-Methoxypropan-1-ol.

Referemce:
https://en.wikipedia.org/wiki/Ether,
Ether | (C2H5)2O – PubChem

Auersvald, Milos published the artcileElectrometric bromine number as a suitable method for the quantitative determination of phenols and olefins in hydrotreated pyrolysis bio-oils, Application of 2-Methoxynaphthalene, the publication is Talanta (2021), 122001, database is CAplus and MEDLINE.

Bio-oils after hydrotreatment can still contain significant amount of phenols and cyclic olefins as the products of an incomplete deoxygenation. The removal of these compounds would be necessary to produce suitable components for automotive fuels. However, no routine method currently exists for the reliable determination of these groups in hydrotreated bio-oils (HBOs). In this paper, we analyzed 140 different pure oxygenates as model compounds using the bromine number method (ASTM D1159) observing that most compounds present in HBOs react with one equivalent of bromine. The determination of phenols using bromine number method in crude bio-oil is complicated especially by the presence of guaiacols and syringols that react with more than one equivalent of bromine and, thus, the obtained result is significantly overestimated. Further we optimized the chromatog. separation of hydrocarbons from HBOs for the selective determination of olefins content. As no other reactive compounds under the conditions of the method, besides phenols and olefins, were observed in HBOs, the difference between HBO bromine number (before hydrocarbons separation) and olefins content correspond to the total amount of phenols. The method was finally applied to 11 HBOs with different content of oxygen, providing a good correlation between phenols and oxygen content.

Talanta published new progress about 93-04-9. 93-04-9 belongs to ethers-buliding-blocks, auxiliary class Naphthalene,Ether, name is 2-Methoxynaphthalene, and the molecular formula is C11H10O, Application of 2-Methoxynaphthalene.

Referemce:
https://en.wikipedia.org/wiki/Ether,
Ether | (C2H5)2O – PubChem

Bruzik, K. published the artcileThiono-thiolo rearrangement and solvolysis of the secondary alkyl phosphorothionates. 3, Synthetic Route of 2944-47-0, the publication is Journal of Organic Chemistry (1981), 46(8), 1618-24, database is CAplus.

The protic acid-catalyzed thiono-thiolo (O→S) migration of secondary alkyl groups R in title esters I occurs in a complex fashion. Anal. of product distribution, stereochem., and D-incorporation experiments supports an ion pair-type intermediate (e.g., II.CF₃CO₂^–R⁺) as being responsible for the entire process. Nucleophilic attack by I on the ion pair initiates the chain reaction leading to III. In CF₃CO₂H, inversion of configuration (96%) at the C atom of the migrating EtCHMe group was observed A high concentration of I promotes this mode of rearrangement. However, the overall stereospecificity of EtCHMe migration is much lower, owing to an elimination process leading to the dialkyl H phosphorothioate II and an intermediate olefin which after protonation in acidic medium returns to the ion pair. The latter process is responsible for the nonstereospecific formation of part of the rearrangement product III and contributes to the lower stereospecificity of the trifluoroacetolysis process. The role of the acidity of the medium is discussed.

Journal of Organic Chemistry published new progress about 2944-47-0. 2944-47-0 belongs to ethers-buliding-blocks, auxiliary class Benzene,Ether, name is 2-Isopropylanisole, and the molecular formula is C10H14O, Synthetic Route of 2944-47-0.

Referemce:
https://en.wikipedia.org/wiki/Ether,
Ether | (C2H5)2O – PubChem

Mierina, Inese published the artcileA green and effective route leading to antiradical agents with 3-arylmethyl 4-hydroxyquinolin-2(1H)-one moiety, Category: ethers-buliding-blocks, the publication is Tetrahedron Letters (2022), 153847, database is CAplus.

A new, green, convenient, cost- and atom effective route leading to 3-arylmethyl 4-hydroxyquinolin-2(1H)-ones from arylaldehydes and 1,3-dicarbonyl compounds in tri-Et ammonium formate in good to excellent yield was presented. The provided method foresaw the Knoevenagel condensation between a 4-hydroxyquinolin-2(1H)-one and an aromatic aldehyde followed by in-situ trapping of the arylidene intermediate with the hydride ion. All synthesized compounds were tested for their antiradical activity against DPPH and GO free radicals. The antiradical activity of the 3-arylmethyl 4-hydroxyquinolin-2(1H)-ones was comparable to or even higher than that of some com. widely used antioxidants like BHT, TBHQ, or α-tocopherol.

Tetrahedron Letters published new progress about 134-96-3. 134-96-3 belongs to ethers-buliding-blocks, auxiliary class Immunology/Inflammation,COX,Natural product, name is 4-Hydroxy-3,5-dimethoxybenzaldehyde, and the molecular formula is C9H10O4, Category: ethers-buliding-blocks.

Referemce:
https://en.wikipedia.org/wiki/Ether,
Ether | (C2H5)2O – PubChem

Bird, Ian published the artcileSynthesis of pyrilamine-d₆, Related Products of ethers-buliding-blocks, the publication is Journal of Labelled Compounds and Radiopharmaceuticals (1985), 22(2), 109-15, database is CAplus.

Pyrilamine-d₆ (I) was synthesized from N-2-[(4-methoxyphenyl)methyl]aminopyridine and (D₃C)₂NCH₂CH₂Cl in 83% yield. The alkyl chloride was prepared in 37% overall yield in a three step reaction from p-MeC₆H₄SO₂N(CD₃)₂.

Journal of Labelled Compounds and Radiopharmaceuticals published new progress about 52818-63-0. 52818-63-0 belongs to ethers-buliding-blocks, auxiliary class Pyridine,Amine,Benzene,Ether, name is N-(4-Methoxybenzyl)pyridin-2-amine, and the molecular formula is C13H14N2O, Related Products of ethers-buliding-blocks.

Referemce:
https://en.wikipedia.org/wiki/Ether,
Ether | (C2H5)2O – PubChem

Dethe, Dattatraya H. published the artcileSc(OTf)₃-Catalyzed Synthesis of Symmetrical Dithioacetals and Bisarylmethanes Using Nitromethane as a Methylene Source, Product Details of C11H10O, the publication is Organic Letters (2020), 22(15), 5778-5782, database is CAplus and MEDLINE.

Use of nitromethane as an electrophilic methylene source for the synthesis of sym. dithioacetals and bisarylmethanes has been showcased using Sc(OTf)₃ as a catalyst. The procedure allows straightforward access to densely functionalized dithioacetals and bisarylmethanes under mild conditions. Addnl., the method has been applied for the synthesis of antimalarial tetra-Me mellotojaponin C and anticancer dimeric phloroglucinol derivative

Organic Letters published new progress about 93-04-9. 93-04-9 belongs to ethers-buliding-blocks, auxiliary class Naphthalene,Ether, name is 2-Methoxynaphthalene, and the molecular formula is C11H10O, Product Details of C11H10O.

Referemce:
https://en.wikipedia.org/wiki/Ether,
Ether | (C2H5)2O – PubChem

Larionov, S. V. published the artcileReaction of 2,4-dithiobiuret with copper(II), silver(I), cadmium(II) and mercury(II) ions, Safety of Formamidine disulfide dihydrochloride, the publication is Izvestiya Sibirskogo Otdeleniya Akademii Nauk SSSR, Seriya Khimicheskikh Nauk (1967), 84-8, database is CAplus.

2,4-Dithiobiuret [HN:C(SH)NHC(SH):NH] (I) is determined by potentiometric titration with either iodine or with H2NC(:NH)SSC(:NH)NH2.2HCl (II). In each case I is converted to III. In the titration with iodine conducted in boiling water, the error is ∼1%. In the titration with II the error is ∼0.3%. Treatment of 0.27 g. of I in 15 ml. of 96% EtOH with a solution of 0.5 g. of CuSO4.5H2O and 1 ml. of 57% HClO4 in 200 ml. H2O (pH ∼2) or in aqueous EtOH yielded a flocculent greenish precipitate, which did not alter on standing. After 30-40 min. the precipitate yielded 0.2 g. CuC2H2N3S2. In a 50% aqueous solution of Me2CO, containing 0.1M HClO4, the reaction of Cu(ClO4)2 with I generated its most intense color (in the 400-550 mμ range) at a molar ratio of about 1:4. Cd(II) in ammoniacal solution reacted with I to give a white precipitate, which rapidly became yellow, presumably due to CdS formation. The reaction of Hg(ClO4)2 with I was followed potentiometrically. A greenish yellow precipitate, corresponding to 1:1 molar stoichiometry, formed and rapidly became black on standing. Titration of I with Ag salts did not give reproducible results.

Izvestiya Sibirskogo Otdeleniya Akademii Nauk SSSR, Seriya Khimicheskikh Nauk published new progress about 14807-75-1. 14807-75-1 belongs to ethers-buliding-blocks, auxiliary class Salt,Thiourea,Amine,Aliphatic hydrocarbon chain, name is Formamidine disulfide dihydrochloride, and the molecular formula is C2H8Cl2N4S2, Safety of Formamidine disulfide dihydrochloride.

Referemce:
https://en.wikipedia.org/wiki/Ether,
Ether | (C2H5)2O – PubChem