Month: December 2022

Hu, Guishan published the artcilePyrazine-cored covalent organic frameworks for efficient CO₂ adsorption and removal of organic dyes, Related Products of ethers-buliding-blocks, the publication is Polymer Chemistry (2022), 13(25), 3827-3832, database is CAplus.

The rational introduction of nitrogen heterocycles into a linker of covalent organic frameworks (COFs) can effectively capture CO₂ and remove dyes in sewage. Here, we report the designed synthesis of COF-H1 and COF-H2, starting from integration reactions between a novel tetratopic 2,3,5,6-tetrakis(4-aminophenyl)pyrazine and ditopic aromatic aldehydes. They crystallize as 2D microporous pore structures with high stability in different environments, exhibiting good CO₂ uptake capacities of 56.8 and 66.2 mg g^-1 at 273 K, resp. COF-H1 and COF-H2 exhibit efficient adsorption performances for rhodamine B, methylene blue, Congo red and gentian violet, especially reaching the adsorption equilibrium for Congo red in 5 min together with an adsorption capacity of 470.3 and 362.9 mg g^-1, resp.

Polymer Chemistry published new progress about 91-16-7. 91-16-7 belongs to ethers-buliding-blocks, auxiliary class Benzene,Ether,Inhibitor,Inhibitor,Inhibitor, name is 1,2-Dimethoxybenzene, and the molecular formula is C8H10O2, Related Products of ethers-buliding-blocks.

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

Xue, Rui published the artcileThe composition, physicochemical properties, antimicrobial and antioxidant activity of wood vinegar prepared by pyrolysis of Eucommia ulmoides Oliver branches under different refining methods and storage conditions, Related Products of ethers-buliding-blocks, the publication is Industrial Crops and Products (2022), 114586, database is CAplus.

To enhance the quality of wood vinegar (WV), the WV prepared by pyrolyzing Eucommia ulmoides Oliver (EUO) branches at the temperature of 650°C were refined by using different physicochem. methods. The crude WV was refined by ultra-low freezing and thawing (WV_FT), charcoal adsorption (WV_CA), and activated carbon adsorption (WV_ACA), resp. Meanwhile, the chem. compositions, antimicrobial and antioxidant activity of the crude WV (WV_C), the WV (WV_S) prepared two years ago, and the photolysis WV (WV_P) were investigated. The results showed that the WV_FT obtained by ultra-low freezing and thawing method possessed better quality with pH of 3.45, d. of 1.045 g/cm³ , refractive index of 26.85% and total organic acid of 11.00%. It was also found that WV_FT had better inhibition rate of 83.33% against Bacterium prodigiosum, indication the excellent antibacterial activity. Moreover, WV_FT had significant effect on scavenging rate (98.72%) for hydroxyl radicals. This research could offer some references for the refining methods of WV, and the WV was expected to be a potential candidate for materials of antioxidant and antimicrobial.

Industrial Crops and Products 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 C6H4ClNO2, Related Products of ethers-buliding-blocks.

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

Kitson, Trevor M. published the artcileStudies on possible mechanisms for the interaction between cyanamide and aldehyde dehydrogenase, HPLC of Formula: 14807-75-1, the publication is Biochemical Pharmacology (1979), 28(17), 2551-6, database is CAplus and MEDLINE.

Cyanamide (I) [420-04-2] reacted with amino and thiol groups to form guanidino and isothiouronium compounds resp. under physiol. conditions. Sheep liver cytoplasmic aldehyde dehydrogenase (II) [9028-86-8] activity in vitro was not affected by I (1-50 mM), dicyandiamide [461-58-5] (1 mM), or the aminoethylisothiouronium bromide-HBr (III) [56-10-0] (1 mM). Formamidine disulfide-2HCl [14807-75-1] (10-20 μM) inhibited II activity in vitro, but thiourea [62-56-6] (50 mg/kg, i.p. daily for 5 days) and III, (200 mg/kg, i.p., daily for 5 days) did not affect II activity in rat liver in vivo in either cytoplasm or mitochondria. The possible modes of action of I on alc. metabolism are discussed.

Biochemical Pharmacology 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, HPLC of Formula: 14807-75-1.

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

Kheirabadi, Mahboubeh published the artcileLeveraging a “Catch-Release” Logic Gate Process for the Synthesis and Nonchromatographic Purification of Thioether- or Amine-Bridged Macrocyclic Peptides, Product Details of C25H23NO4, the publication is Journal of Organic Chemistry (2018), 83(8), 4323-4335, database is CAplus and MEDLINE.

Macrocyclic peptides containing N-alkylated amino acids have emerged as a promising therapeutic modality, capable of modulating protein-protein interactions and an intracellular delivery of hydrophilic payloads. While multichannel automated solid-phase peptide synthesis (SPPS) is a practical approach for peptide synthesis, the requirement for slow and inefficient chromatog. purification of the product peptides is a significant limitation to exploring these novel compounds Herein, we invent a “catch-release” strategy for the nonchromatog. purification of macrocyclic peptides. A traceless catch process is enabled by the invention of a dual-functionalized N-terminal acetate analog, which serves as a handle for capture onto a purification resin and as a leaving group for macrocyclization. Displacement by a C-terminal nucleophilic side chain thus releases the desired macrocycle from the purification resin. By design, this catch/release process is a logic test for the presence of the key components required for cyclization, thus removing impurities which lack the required functionality, such as common classes of peptide impurities, including hydrolysis fragments and truncated sequences. The method was shown to be highly effective with three libraries of macrocyclic peptides, containing macrocycles of 5-20 amino acids, with either thioether- or amine-based macrocyclic linkages; in this latter class, the reported method represents an enabling technol. In all cases, the catch-release protocol afforded significant enrichment of the target peptides purity, in many cases completely obviating the need for chromatog. Importantly, we have adapted this process for automation on a standard multichannel peptide synthesizer, achieving an efficient and completely integrated synthesis and purification platform for the preparation of these important mols.

Journal of Organic Chemistry 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, Product Details of C25H23NO4.

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

Premnath, Padmavathy Nandha published the artcileBenzamide capped peptidomimetics as non-ATP competitive inhibitors of CDK2 using the REPLACE strategy, Product Details of C25H23NO4, the publication is Bioorganic & Medicinal Chemistry Letters (2016), 26(15), 3754-3760, database is CAplus and MEDLINE.

Inhibition of cyclin dependent kinase 2 (CDK2) in complex with cyclin A in G1/S phase of the cell cycle has been shown to promote selective apoptosis of cancer cells through the E2F1 pathway. An alternative approach to catalytic inhibition is to target the substrate recruitment site also known as the cyclin binding groove (CBG) to generate selective non-ATP competitive inhibitors. The REPLACE strategy has been applied to identify fragment alternatives and substituted benzoic acid derivatives were evaluated as a promising scaffold to present appropriate functionality to mimic key peptide determinants. Fragment Ligated Inhibitory Peptides (FLIPs) are described which potently inhibit both CDK2/cyclin A and CDK4/cyclin D1 and have preliminary antitumor activity. A structural rationale for binding was obtained through mol. modeling further demonstrating their potential for further development as next generation non ATP competitive CDK inhibitors.

Bioorganic & Medicinal Chemistry Letters 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, Product Details of C25H23NO4.

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

Premnath, Padmavathy Nandha published the artcileIterative Conversion of Cyclin Binding Groove Peptides into Druglike CDK Inhibitors with Antitumor Activity, SDS of cas: 77128-73-5, the publication is Journal of Medicinal Chemistry (2015), 58(1), 433-442, database is CAplus and MEDLINE.

The cyclin groove is an important recognition site for substrates of the cell cycle cyclin-dependent kinases and provides an opportunity for highly selective inhibition of kinase activity through a non-ATP competitive mechanism. The key peptide residues of the cyclin binding motif have been studied in order to precisely define the structure-activity relationship for CDK kinase inhibition. Through this information, new insights into the interactions of peptide CDK inhibitors with key subsites of the cyclin binding groove provide for the replacement of binding determinants with more druglike functionality through REPLACE, a strategy for the iterative conversion of peptidic blockers of protein-protein interactions into pharmaceutically relevant compounds As a result, REPLACE is further exemplified in combining optimized peptidic sequences with effective N-terminal capping groups to generate more stable compounds possessing antitumor activity consistent with on-target inhibition of cell cycle CDKs. The compounds described here represent prototypes for a next generation of kinase therapeutics with high efficacy and kinome selectivity, thus avoiding problems observed with first generation CDK inhibitors.

Journal of Medicinal Chemistry 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, SDS of cas: 77128-73-5.

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

Smith, Amos B. III published the artcileTotal Synthesis of (-)-2-epi-Peloruside A, Synthetic Route of 99438-28-5, the publication is Organic Letters (2008), 10(24), 5501-5504, database is CAplus and MEDLINE.

A convergent synthesis of (-)-2-epi-peloruside A has been achieved. Highlights include implementation of multi-component type I anion relay chem. (ARC) to unite 2-TBS-1,3-dithiane with two epoxides to construct the eastern hemisphere, a late-stage dithiane union to secure the complete, fully functionalized carbon backbone, and Yamaguchi macrolactonization, which led to (-)-2-epi-peloruside A via an unexpected epimerization at C(2).

Organic Letters 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 C5H10O, Synthetic Route of 99438-28-5.

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

Legare, Marc-Andre published the artcileMetal-free catalytic C-H bond activation and borylation of heteroarenes, Computed Properties of 596819-12-4, the publication is Science (Washington, DC, United States) (2015), 349(6247), 513-516, database is CAplus and MEDLINE.

Transition metal complexes are efficient catalysts for the C-H bond functionalization of heteroarenes to generate useful products for the pharmaceutical and agricultural industries. However, the costly need to remove potentially toxic trace metals from the end products has prompted great interest in developing metal-free catalysts that can mimic metallic systems. Authors demonstrated that the borane (1-TMP-2-BH₂-C₆H₄)₂ (TMP, 2,2,6,6-tetramethylpiperidine) can activate the C-H bonds of heteroarenes and catalyze the borylation of furans, pyrroles, and electron-rich thiophenes. The selectivities complement those observed with most transition metal catalysts reported for this transformation.

Science (Washington, DC, United States) published new progress about 596819-12-4. 596819-12-4 belongs to ethers-buliding-blocks, auxiliary class Thiophene,Boronic acid and ester,Ether,Boronate Esters,Boronic acid and ester, name is 2-(5-Methoxythiophen-2-yl)-4,4,5,5-tetramethyl-1,3,2-dioxaborolane, and the molecular formula is C11H17BO3S, Computed Properties of 596819-12-4.

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

Loubinoux, B. published the artcileSelective demethylation of aryl methyl ethers, Formula: C10H14O, the publication is Synthesis (1980), 638-40, database is CAplus.

Title ethers RC₆H₄OMe (R = 3-Me, 4-Me, 2-Me₂CH, 2-MeO, 3-MeO, 4-MeO) were treated with PhMeNNa in the presence of (Me₂N)₃PO to give 80-95% RC₆H₄OH. Monodealkylation of Me ethers of polyhydric phenols, e. g., 1,3,5-trimethoxybenzene and the dimethoxybenzene isomers, was easily achieved. Both Me and benzyl ethers were cleaved but methyl ethers were cleaved more easily.

Synthesis 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, Formula: C10H14O.

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

Casimiro, Filipa M. published the artcileHardwood and softwood lignins from sulfite liquors: Structural characterization and valorization through depolymerization, COA of Formula: C9H10O4, the publication is International Journal of Biological Macromolecules (2022), 272-279, database is CAplus and MEDLINE.

This work aims to evaluate the structural characteristics and study the oxidative depolymerization of lignins obtained from hardwood and softwood sulfite liquors. Lignins were obtained after ultrafiltration and freeze-drying of the sulfite liquors and characterized based on inorganic content, nitrobenzene oxidation, ¹³C NMR, and mol. weight determination The structural characteristics achieved allow evaluating the potential of each lignin through oxidative depolymerization to produce added-value phenolic monomers. Hardwood and softwood lignins were submitted to alk. oxidation with oxygen and the reaction conditions optimized to obtain a final oxidation mixture with the maximum yield of phenolic monomers. Through oxidation with O₂, hardwood lignin generates mostly syringaldehyde while lignin from softwood biomass mainly produces vanillin; moreover, a lower reaction time and the interruption of O₂ admission avoid the degradation of the oxidation products in the final mixture for both lignins, more evidenced to hardwood lignin due to its higher reactivity. From the results, it is possible to conclude that a phenolic aldehyde-rich oxidation mixture could be obtained, confirming the viability of lignin as raw material to produce added-value products as vanillin and syringaldehyde.

International Journal of Biological Macromolecules 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, COA of Formula: C9H10O4.

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