Month: December 2022

Liu, Cuibo published the artcileElectrocatalytic Deuteration of Halides with D₂O as the Deuterium Source over a Copper Nanowire Arrays Cathode, Safety of 2-Methoxynaphthalene, the publication is Angewandte Chemie, International Edition (2020), 59(42), 18527-18531, database is CAplus and MEDLINE.

Precise D incorporation with controllable deuterated sites is extremely desirable. Here, a facile and efficient electrocatalytic deuterodehalogenation of halides using D₂O as the deuteration reagent and Cu nanowire arrays (Cu NWAs) electrochem. formed in situ as the cathode was demonstrated. A cross-coupling of C and D free radicals might be involved for this ipso-selective deuteration. This method exhibited excellent chemoselectivity and high compatibility with the easily reducible functional groups (C=C, C C, C=O, C=N, C N). The C-H to C-D transformations were achieved with high yields and D ratios through a 1-pot halogenation-deuterodehalogenation process. Efficient deuteration of less-active bromide substrates, specific D incorporation into top-selling pharmaceuticals, and oxidant-free paired anodic synthesis of high-value chems. with low energy input highlighted the potential practicality.

Angewandte Chemie, International Edition 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, Safety of 2-Methoxynaphthalene.

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

Shi, Qianqian published the artcileNutrient composition and quality traits of dried jujube fruits in seven producing areas based on metabolomics analysis, Application of 4-Hydroxy-3,5-dimethoxybenzaldehyde, the publication is Food Chemistry (2022), 132627, database is CAplus and MEDLINE.

Chinese jujube is a widely cultivated fruit of the Rhamnaceae family. However, there are few reports on the comprehensive evaluation of jujube fruit quality in the main jujube producing areas. Liquid chromatog. tandem-mass spectrometry (LC-MS/MS), principal component anal. (PCA), cluster anal., and ranking score were used to comprehensively evaluate the metabolic traits and quality of 20 dried jujube varieties in the seven main producing areas in China. A total of 29 categories of 463 metabolites were identified and detected; among them, alkaloids, amino acids, flavonoids, and lipids are the main nutrients in dried jujube fruits. An anal. of the content of metabolites in dried jujube fruits from seven producing areas showed that the difference in the fruit quality traits between the producing areas is significant, exhibiting the regional characteristics of the eastern and western regions in North China. In addition, jujube varieties HN-L-L (72 points), XJ-H-Hm (59 points), and XJ-H-Hp (59 points) with the highest scores are rich in nutrients and can be used as raw materials in the development of functional foods.

Food Chemistry 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 C19H14N2, Application of 4-Hydroxy-3,5-dimethoxybenzaldehyde.

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

Babatunde, Oluwatoyin published the artcileDihydroquinazolin-4(1H)-one derivatives as novel and potential leads for diabetic management, Application In Synthesis of 134-96-3, the publication is Molecular Diversity (2022), 26(2), 849-868, database is CAplus and MEDLINE.

A variety of dihydroquinazolin-4(1H)-one derivatives (1-37) were synthesized via “one-pot” three-component reaction scheme by treating aniline and different aromatic aldehydes with isatoic anhydride in the presence of acetic acid. Chem. structures of compounds were deduced by different spectroscopic techniques including EI-MS, HREI-MS, 1H-, and 13C-NMR. Compounds were subjected to α-amylase and α-glucosidase inhibitory activities. A number of derivatives exhibited significant to moderate inhibition potential against α-amylase (IC₅₀ = 23.33 ± 0.02-88.65 ± 0.23 μM) and α -glucosidase (IC₅₀ = 25.01 ± 0.12-89.99 ± 0.09 μM) enzymes, resp. Results were compared with the standard acarbose (IC₅₀ = 17.08 ± 0.07 μM for α-amylase and IC₅₀ = 17.67 ± 0.09 μM for α -glucosidase). Structure-activity relationship (SAR) was rationalized by analyzing the substituents effects on inhibitory potential. Kinetic studies were implemented to find the mode of inhibition by compounds which revealed competitive inhibition for α-amylase and non-competitive inhibition for α-glucosidase. However, in silico study identified several important binding interactions of ligands (synthetic analogs) with the active site of both enzymes.

Molecular Diversity 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, Application In Synthesis of 134-96-3.

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

Salveson, Patrick J. published the artcileControlling the Oligomerization State of Aβ-Derived Peptides with Light, Quality Control of 77128-73-5, the publication is Journal of the American Chemical Society (2018), 140(17), 5842-5852, database is CAplus and MEDLINE.

A key challenge in studying the biol. and biophys. properties of amyloid-forming peptides is that they assemble to form heterogeneous mixtures of soluble oligomers and insoluble fibrils. Photolabile protecting groups have emerged as tools to control the properties of biomols. with light. Blocking intermol. hydrogen bonds that stabilize amyloid oligomers provides a general strategy to control the biol. and biophys. properties of amyloid-forming peptides. In this paper we describe the design, synthesis, and characterization of macrocyclic β-hairpin peptides that are derived from amyloidogenic peptides and contain the N-2-nitrobenzyl photolabile protecting group. Each peptide contains two heptapeptide segments from Aβ_16-36 or Aβ_17-36 constrained into β-hairpins. The N-2-nitrobenzyl group is appended to the amide backbone of Gly₃₃ to disrupt the oligomerization of the peptides by disrupting intermol. hydrogen bonds. X-ray crystallog. reveals that N-2-nitrobenzyl groups can either block assembly into discrete oligomers or permit formation of trimers, hexamers, and dodecamers. Photolysis of the N-2-nitrobenzyl groups with long-wave UV light unmasks the amide backbone and alters the assembly and the biol. properties of the macrocyclic β-hairpin peptides. SDS-PAGE studies show that removing the N-2-nitrobenzyl groups alters the assembly of the peptides. MTT conversion and LDH release assays show that decaging the peptides induces cytotoxicity. CD studies and dye leakage assays with liposomes reveal that decaging modulates interactions of the peptides with lipid bilayers. Collectively, these studies demonstrate that incorporating N-2-nitrobenzyl groups into macrocyclic β-hairpin peptides provides a new strategy to probe the structures and the biol. properties of amyloid oligomers.

Journal of the American Chemical Society 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, Quality Control of 77128-73-5.

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

Brieger, Gottfried published the artcileConvenient O-alkylation of phenols, Recommanded Product: 2-Isopropylanisole, the publication is Journal of Chemical and Engineering Data (1968), 13(4), 581-2, database is CAplus.

The preparation of several aryl-methyl ethers by refluxing excess MeI with the corresponding phenols is described. HCONMe2 was the solvent used, and anhydrous K2CO3 was the base. Yields for several phenols are given.

Journal of Chemical and Engineering Data 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, Recommanded Product: 2-Isopropylanisole.

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

Pietrasiak, Ewa published the artcileCobalt-Catalyzed Formation of Grignard Reagents via C-O or C-S Bond Activation, Application In Synthesis of 93-04-9, the publication is Journal of Organic Chemistry (2022), 87(13), 8380-8389, database is CAplus and MEDLINE.

C(aryl)-OMe bond functionalization catalyzed by Co(II) chloride in combination with a nacnac-type ligand and Mg as a reductant is reported. Borylation and benzoylation of aryl methoxides are demonstrated, and C(aryl)-SMe bond borylation can be achieved under similar conditions. This is the 1st example of achieving these transformations using Co catalysis. Mechanistic studies suggest that a Grignard reagent is generated as an intermediate in a rare example of a magnesiation via a C-O bond activation reaction. Indeed, an organomagnesium species could be directly observed by electrospray ionization mass spectroscopic anal. Kinetic experiments indicate that a heterogeneous Co catalyst performs the C-O bond activation.

Journal of Organic Chemistry 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 In Synthesis of 93-04-9.

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

Cicek, Metin published the artcileHalf-sandwich Ru(II) arene complexes bearing benzimidazole ligands for the N-alkylation reaction of aniline with alcohols in a solvent-free medium, Quality Control of 52818-63-0, the publication is New Journal of Chemistry (2021), 45(25), 11075-11085, database is CAplus.

The direct N-alkylation reactions of amines with alc. derivatives using the borrowing hydrogen methodol. were investigated. For this purpose, a new series of half-sandwich ruthenium(II) complexes bearing N-coordinated benzimidazole complexes were synthesized and fully characterized by FT-IR, ¹H NMR and ¹³C NMR spectroscopies. Addnl., the structures of the complexes were characterized by X-ray crystallog. All new complexes were investigated for their catalytic activities in the alkylation of amines with alc. derivatives It was found that alkylation reactions in a solvent-free medium were efficient and selective.

New Journal of Chemistry 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, Quality Control of 52818-63-0.

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

Brown, Herbert C. published the artcileChiral synthesis via organoboranes. XVI. Boroxazolidones derived from α-amino acids and borinic or boronic esters. A simple procedure for upgrading borinates and boronates to materials of high optical purity, Category: ethers-buliding-blocks, the publication is Journal of Organometallic Chemistry (1988), 341(1-3), 73-81, database is CAplus.

The synthesis of boron heterocycles from borinic and boronic esters with α-amino acids was explored as a means of upgrading the optical purities of intermediates from asym. hydroboration. B-Methoxy-9-borabicyclo[3.3.1]nonane, Me dicyclohexylborinate, and (+)- and (-)-Me diisopinocampheylborinate react with various α-amino acids to form the corresponding crystalline chelates. Recrystallization of the chelates derived from Me trans-2-phenylcyclopentylisopinocampheylborinate of 85% enantiomeric excess (ee) with L-phenylalanine, Me isopinocampheyl-exo-norbornylborinate of 83% ee with L-proline, and both optical isomers of Me diisopinocampheylborinate of 92% ee with L-proline yield the corresponding products with optical purities approaching 100% ee. Di-Me cyclopentylboronate, di-Me exo-norbornylboronate, and di-Me isopinocampheylboronate upon treatment with iminodiacetic acid and N-methyliminodiacetic acid form the corresponding bicyclic boronates. Recrystallization of the chelate derived from di-Et 3-tetrahydropyranylboronate and iminodiacetic acid yields a product of essentially 100% ee. Consequently, formation of boroxazolidones of asym. hydroboration products provides one possible route to upgrade such products to materials of high optical purity.

Journal of Organometallic Chemistry published new progress about 99438-28-5. 99438-28-5 belongs to ethers-buliding-blocks, auxiliary class Chiral,Aliphatic cyclic hydrocarbon, name is (+)-B-Methoxydiisopinocampheylborane, and the molecular formula is C21H37BO, Category: ethers-buliding-blocks.

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

Huang, Jing published the artcileDesign, synthesis and evaluation of potent G-protein coupled receptor 40 agonists, Related Products of ethers-buliding-blocks, the publication is Chinese Chemical Letters (2016), 27(1), 159-162, database is CAplus.

GPR40 has emerged as an attractive drug target for the treatment of type 2 diabetes due to its role in the enhancement of insulin secretion with glucose dependency. With the aim to improve the metabolic and safety profiles, a series of novel phenylpropionic acid derivatives were synthesized. Extensive structural optimization led to identification of compounds I and II as potent GPR40 agonists with moderate liver microsomal stability. All the discovery supported further exploration surrounding this scaffold.

Chinese Chemical Letters published new progress about 1823170-17-7. 1823170-17-7 belongs to ethers-buliding-blocks, auxiliary class Fluoride,Boronic acid and ester,Benzene,Ether,Boronate Esters,Boronic Acids,Boronic acid and ester,, name is 2-(4-(Benzyloxy)-2-fluorophenyl)-4,4,5,5-tetramethyl-1,3,2-dioxaborolane, and the molecular formula is C19H22BFO3, Related Products of ethers-buliding-blocks.

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

Rajendiran, Senkuttuvan published the artcileA heterogenized cobaltate catalyst on a bis-imidazolium-based covalent triazine framework for hydroesterification of epoxides, Formula: C4H10O2, the publication is New Journal of Chemistry (2018), 42(14), 12256-12262, database is CAplus.

An imidazolium-cobaltate-based heterogeneous catalyst exhibits advantages over its homogeneous counterpart in the synthesis of β-hydroxyesters from epoxides. However, leaching of cobaltate from the catalytic support decreases the selectivity and recyclability of the catalyst. To overcome such drawbacks, a bis-imidazolium-based covalent triazine framework (CTF) is employed as a catalytic support for the hydroesterification catalyst to reduce cobaltate leaching by the intramol. anion stabilization effect of the multi-imidazolium moiety, resulting in an excellent selectivity for the β-hydroxyester and unprecedented recyclability.

New Journal of Chemistry 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 C4H10O2, Formula: C4H10O2.

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