Month: October 2022

Misik, Vladimir; Miyoshi, Norio; Riesz, Peter published the artcile< EPR spin trapping study of the decomposition of azo compounds in aqueous solutions by ultrasound: potential for use as sonodynamic sensitizers for cell killing>, Recommanded Product: Sodium 5,5′-(diazene-1,2-diyl)bis(2-hydroxybenzoate), the main research area is ultrasound azo compound free radical formation.

Sonodynamic therapy, a promising new approach to cancer treatment, is based on synergistic cell killing by combination of certain drugs (sonosensitizers) and ultrasound. Although the mechanism of sonodynamic action is not understood, the role of free radicals produced from sonosensitizers by ultrasound is implicated. In this work, we studied formation of free radicals during the decomposition of several water-soluble azo compounds by 50 kHz ultrasound in aqueous solutions Using the spin trp 3,5-dibromo-4-nitrosobenzene sulfonate (DBNBS) tertiary carbon-centered radicals from 2,2′-azobis (N,N’-bimethyleneisobutyramidine) dihydrochloride (VA-044), 2-(carbamoylazo)isobutyronitrile (V-30), and 2,2′-azobis(2-amidinopropane) dihydrochloride (AAPH) and •CH3 radicals from 1,1′-azobis(N,N’-dimethylformamide) (ADMF) were detected in argon-saturated solutions and the corresponding oxygen-centered radicals (alkoxyl and peroxyl) from VA-044, V-30, and AAPH were identified using the spin trap 5,5′-dimethyl-1-pyrroline-N-oxide (DMPO) in aerated sonicated solutions No free radicals from 4,4′-dihydroxyazobenzene-3,3′-dicarboxylic acid, disodium salt (DHAB) could be found in either system. While VA-044 and AAPH could also be readily decomposed by heat (42.5 °C and 80 °C), V-30 decomposition only occurred in the ultrasound-exposed solutions The most likely mechanism of decomposition of azo compounds by ultrasound is their thermolysis in the heated shell of the liquid surrounding cavitating bubbles driven by ultrasound and/or by pyrolysis inside these bubbles. Experiments using scavengers of •OH and •H, which are produced by sonolysis in aqueous solutions, demonstrated that these radicals are not involved in the ultrasound-mediated radical production from the azo compounds Due to the known cytotoxic potential of free radicals produced from azo compounds, the use of these compounds as ultrasound sensitizers appears to be a promising approach for sonodynamic cell killing.

Free Radical Research published new progress about Azo compounds Role: RCT (Reactant), RACT (Reactant or Reagent). 6054-98-4 belongs to class alcohols-buliding-blocks, and the molecular formula is C14H8N2Na2O6, Recommanded Product: Sodium 5,5′-(diazene-1,2-diyl)bis(2-hydroxybenzoate).

Referemce:
Alcohol – Wikipedia,
Alcohols – Chemistry LibreTexts

Chen, Jieping; Ying, Jiale; Lu, Zhan published the artcile< Cobalt-catalyzed branched selective hydroallylation of terminal alkynes>, SDS of cas: 10602-04-7, the main research area is branched skipped diene preparation regioselective; terminal alkyne allylic electrophile Markovnikov hydroallylation cobalt catalyst.

Here, authors reported a cobalt-hydride-catalyzed Markovnikov-type hydroallylation of terminal alkynes with allylic electrophile to access valuable and branched skipped dienes (1,4-dienes) with good regioselectivity. This operationally simple protocol exhibits excellent functional group tolerance and exceptional substrate scope. The reactions could be carried out in gram-scale with TON (turn over number) up to 1160, and the products could be easily derivatized. The preliminary mechanism of electrophilic allylation of α-selective cobalt alkenyl intermediate was proposed based on deuterium labeling experiment and kinetic studies.

Nature Communications published new progress about Alkadienes Role: SPN (Synthetic Preparation), PREP (Preparation) (1,4-). 10602-04-7 belongs to class alcohols-buliding-blocks, and the molecular formula is C9H8O, SDS of cas: 10602-04-7.

Referemce:
Alcohol – Wikipedia,
Alcohols – Chemistry LibreTexts

Torretta, Simone; Scagliola, Alessandra; Ricci, Luisa; Mainini, Francesco; Di Marco, Sabrina; Cuccovillo, Ivan; Kajaste-Rudnitski, Anna; Sumpton, David; Ryan, Kevin M.; Cardaci, Simone published the artcile< D-mannose suppresses macrophage IL-1β production>, Formula: C6H12O6, the main research area is mannose macrophage IL1beta production.

D-mannose is a monosaccharide approx. a hundred times less abundant than glucose in human blood. Previous studies demonstrated that supraphysiol. levels of D-mannose inhibit tumor growth and stimulate regulatory T cell differentiation. It is not known whether D-mannose metabolism affects the function of non-proliferative cells, such as inflammatory macrophages. Here, we show that D-mannose suppresses LPS-induced macrophage activation by impairing IL-1β production In vivo, mannose administration improves survival in a mouse model of LPS-induced endotoxemia as well as decreases progression in a mouse model of DSS-induced colitis. Phosphomannose isomerase controls response of LPS-activated macrophages to D-mannose, which impairs glucose metabolism by raising intracellular mannose-6-phosphate levels. Such alterations result in the suppression of succinate-mediated HIF-1α activation, imposing a consequent reduction of LPS-induced Il1b expression. Disclosing an unrecognized metabolic hijack of macrophage activation, our study points towards safe D-mannose utilization as an effective intervention against inflammatory conditions.

Nature Communications published new progress about Animal gene, IL1B Role: BSU (Biological Study, Unclassified), BIOL (Biological Study). 3458-28-4 belongs to class alcohols-buliding-blocks, and the molecular formula is C6H12O6, Formula: C6H12O6.

Referemce:
Alcohol – Wikipedia,
Alcohols – Chemistry LibreTexts

Ma, Jiajia; Chen, Shuming; Bellotti, Peter; Guo, Renyu; Schaefer, Felix; Heusler, Arne; Zhang, Xiaolong; Daniliuc, Constantin; Brown, M. Kevin; Houk, Kendall N.; Glorius, Frank published the artcile< Photochemical intermolecular dearomative cycloaddition of bicyclic azaarenes with alkenes>, Safety of But-3-en-1-ol, the main research area is regioselective diastereoselective dearomative cycloaddition bicyclic azaarene alkene.

Dearomative cycloaddition reactions represent an ideal means of converting flat arenes into three-dimensional architectures of increasing interest in medicinal chem. Quinolines, isoquinolines, and quinazolines, despite containing latent diene and alkene subunits, are scarcely applied in cycloaddition reactions because of the inherent low reactivity of aromatic systems and selectivity challenges. Here, we disclose an energy transfer-mediated, highly regio- and diastereoselective intermol. [4 + 2] dearomative cycloaddition reaction of these bicyclic azaarenes with a plethora of electronically diverse alkenes. This approach bypasses the general reactivity and selectivity issues, thereby providing various bridged polycycles that previously have been inaccessible or required elaborate synthetic efforts. Computational studies with d. functional theory elucidate the mechanism and origins of the observed regio- and diastereoselectivities.

Science (Washington, DC, United States) published new progress about Alkenes Role: RCT (Reactant), SPN (Synthetic Preparation), RACT (Reactant or Reagent), PREP (Preparation). 627-27-0 belongs to class alcohols-buliding-blocks, and the molecular formula is C4H8O, Safety of But-3-en-1-ol.

Referemce:
Alcohol – Wikipedia,
Alcohols – Chemistry LibreTexts

McKay, G.; Blair, H. S.; Gardner, J. R. published the artcile< Adsorption of dyes on chitin. I. Equilibrium studies>, Synthetic Route of 6054-98-4, the main research area is adsorption dye chitin; particle size chitin dye adsorption.

Equilibrium isotherms were studied for the adsorption of 4 dyes (Acid Blue 258, Acid Blue 158, Mordant Yellow 5, and Direct Red 84) on chitin. Langmuir and Freundlich constants were determined, and the effects of chitin particle size and solution temperature were investigated. Theor. isotherms are compared with exptl. data; good agreement was obtained with a composite isotherm of the general form: Ye = iCe/(1 + jCem).

Journal of Applied Polymer Science published new progress about Adsorption. 6054-98-4 belongs to class alcohols-buliding-blocks, and the molecular formula is C14H8N2Na2O6, Synthetic Route of 6054-98-4.

Referemce:
Alcohol – Wikipedia,
Alcohols – Chemistry LibreTexts

Ghatak, Avishek; Bhar, Sanjay published the artcile< Green chemoselective reduction of nitroaromatics using recyclable alumina-supported nickel nanoparticles in aqueous medium-exploration to one pot synthesis of benzimidazoles>, Formula: C7H9NO, the main research area is nitroarene nickle alumina nanocatalyst reduction chemoselective; arylamine preparation aryl aldehyde reductive condensation one pot; aryl aralkyl benzimidazole preparation green chem regioselective.

An economical and eco-compatible synthetic protocol for chemoselective and regioselective reduction of nitroarenes in water has been achieved using easily accessible alumina-supported nickel nanoparticles as a stable recyclable heterogeneous catalyst. Various sensitive substituents like allyloxy, benzyloxy, t-butyldimethylsilyloxy, hydroxymethyl, alkoxycarbonyl, formyl, keto, carboxylic acid, chloro, bromo, azo and cyano were tolerated in the aforesaid protocol. The method has been extended for the construction of benziimidazole derivatives through one-pot reductive condensation of arylamines with diversely substituted aryl aldehydes. Some of the synthesized benzimidazole derivatives have been used as antibacterial, antiplatelet, and antithrombotic agents.

Synthetic Communications published new progress about Aromatic amines Role: RCT (Reactant), SPN (Synthetic Preparation), RACT (Reactant or Reagent), PREP (Preparation). 5344-90-1 belongs to class alcohols-buliding-blocks, and the molecular formula is C7H9NO, Formula: C7H9NO.

Referemce:
Alcohol – Wikipedia,
Alcohols – Chemistry LibreTexts

Hubbard, Joleen M.; Toke, Eniko R.; Moretto, Roberto; Graham, Rondell P.; Youssoufian, Hagop; Lorincz, Orsolya; Molnar, Levente; Csiszovszki, Zsolt; Mitchell, Jessica L.; Wessling, Jaclynn; Toth, Jozsef; Cremolini, Chiara published the artcile< Safety and activity of PolyPEPI1018 combined with maintenance therapy in metastatic colorectal cancer: an open-label, multicenter, phase Ib study>, Application In Synthesis of 1492-18-8, the main research area is PolyPEPI1018 tumor associated antigen metastatic colorectal cancer.

Although chemotherapy is standard of care for metastatic colorectal cancer (mCRC), immunotherapy has no role in microsatellite stable (MSS) mCRC, a “”cold”” tumor. PolyPEPI1018 is an off-the-shelf, multi-peptide vaccine derived from 7 tumor-associated antigens (TAA) frequently expressed in mCRC. This study assessed PoIyPEPI1018 combined with first-line maintenance therapy in patients with MSS mCRC. Patients and Methods: Eleven patients with MSS mCRC received PolyPEPI1018 and Montanide ISA51VG adjuvant s.c., combined with tluoropyrimidine/biol. following first-line induction with chemotherapy and a biol. (NCT03391232). In Part A of the study, 5 patients received a single dose; in Part B, 6 patients received up to three doses of Poly- PEPI1018 every 12 wk. The primary objective was safety; secondary objectives were preliminary efficacy, immunogenicity at peripheral and tumor level, and immune correlates. PolyPEPI1018 vaccination was safe and well tolerated. No vaccine-related serious adverse event occurred. Eighty percent of patients had CD8+ T-cell responses against ≥3 TAAs. Increased d. of tumor-infiltrating lymphocytes were detected post-treatment for 3 of 4 patients’ liver biopsies, combined with increased expression of immune-related gene signatures. Three patients had objective response according to REClSTv1.1, and 2 patients qualified for curative surgery. Longer median progression-free survival for patients receiving multiple doses compared with a single dose (12.5 vs. 4.6 mo; P = 0.017) suggested a dose-efficacy correlation. The host HLA genotype predicted multi-antigen specific T-cell responses (P = 0.01) indicative of clin. outcome. PolyPEPI1018 added to maintenance chemotherapy for patients with unresectable, MSS mCRC was safe and associated with specific immune responses and antitumor activity warranting further confirmation in a randomized, controlled setting.

Clinical Cancer Research published new progress about Adenocarcinoma. 1492-18-8 belongs to class alcohols-buliding-blocks, and the molecular formula is C20H21CaN7O7, Application In Synthesis of 1492-18-8.

Referemce:
Alcohol – Wikipedia,
Alcohols – Chemistry LibreTexts

Ravetkar, D. D.; Ambeskar, V. D.; Mashelkar, R. A. published the artcile< Diffusion-adsorption problems in macromolecular systems: new techniques for parameter estimation>, Synthetic Route of 6054-98-4, the main research area is diffusion adsorption polymer parameter estimation; polyacrylamide adsorption parameter estimation; chitin dye adsorption parameter estimation.

The techniques used for estimation of diffusion-adsorption parameters in the past have certain basic flaws. New and efficient techniques for parameter estimation were proposed having many advantages such as using the full concentration-time profile (rather than part of it), time saving, etc. The validity of these techniques was demonstrated by the anal. of the data generated in our laboratory on adsorption of polyacrylamide and also the data on adsorption of dyes on chitin reported in the literature.

Journal of Applied Polymer Science published new progress about Adsorption. 6054-98-4 belongs to class alcohols-buliding-blocks, and the molecular formula is C14H8N2Na2O6, Synthetic Route of 6054-98-4.

Referemce:
Alcohol – Wikipedia,
Alcohols – Chemistry LibreTexts

Xiao, Heng; Chen, Chun; Li, Chao; Huang, Qiang; Fu, Xiong published the artcile< Physicochemical characterization, antioxidant and hypoglycemic activities of selenized polysaccharides from Sargassum pallidum>, Electric Literature of 3458-28-4, the main research area is Sargassum selenium polysaccharide physicochem antioxidant hypoglycemic; Antioxidant; Hypoglycemic; Polysaccharide; Selenylation; Structure.

This study was carried out to study the effects of selenylation on physicochem. and biol. properties of polysaccharide (SPP) extracted from Sargassum pallidum. The selenized derivative of SPP (Se-SPP) with the selenium content of 2419 μg/g was synthesized by sodium selenite/dilute nitric acid method. Physicochem. characterization indicated that selenylation modification resulted in some changes in chem. composition, monosaccharide composition, mol. weight and surface morphol. of polysaccharides. FT-IR spectroscopy showed that a new absorption peak appeared at 675 cm-1 in Se-SPP probably due to the substitution of selenyl groups. Bioactivity assay showed that Se-SPP exhibited higher scavenging radical activities and ferrous ion chelating activities than native SPP. Compared with SPP and acarbose, Se-SPP showed more significantly inhibitory effect on α-glucosidase activity in a noncompetitive inhibition type. The IC50 values of SPP, Se-SPP and acarbose were determined as 1.579, 0.896 and 2.742 mg/mL, resp. These results suggest that Se-SPP can be used to develop a new selenium-complementary ingredient in functional foods.

International Journal of Biological Macromolecules published new progress about Antidiabetic agents. 3458-28-4 belongs to class alcohols-buliding-blocks, and the molecular formula is C6H12O6, Electric Literature of 3458-28-4.

Referemce:
Alcohol – Wikipedia,
Alcohols – Chemistry LibreTexts

Bains, Amreen K.; Singh, Vikramjeet; Adhikari, Debashis published the artcile< Homogeneous Nickel-Catalyzed Sustainable Synthesis of Quinoline and Quinoxaline under Aerobic Conditions>, Related Products of 403-41-8, the main research area is amine alc nickel catalyst dehydrogenative coupling green; quinoline preparation; quinoxaline preparation.

Dehydrogenative coupling-based reactions have emerged as an efficient route toward the synthesis of a plethora of heterocyclic rings. Herein, we report an efficacious, nickel-catalyzed synthesis of two important heterocycles such as quinoline and quinoxaline. The catalyst is molecularly defined, is phosphine-free, and can operate at a mild reaction temperature of 80°C. Both the heterocycles can be easily assembled via double dehydrogenative coupling, starting from 2-aminobenzyl alc./1-phenylethanol and diamine/diol, resp., in a shorter span of reaction time. This environmentally benign synthetic protocol employing an inexpensive catalyst can rival many other transition-metal systems that have been developed for the fabrication of two putative heterocycles. Mechanistically, the dehydrogenation of secondary alc. follows clean pseudo-first-order kinetics and exhibits a sizable kinetic isotope effect. Intriguingly, this catalyst provides an example of storing the trapped hydrogen in the ligand backbone, avoiding metal-hydride formation. Easy regeneration of the oxidized form of the catalyst under aerobic/O2 oxidation makes this protocol eco-friendly and easy to handle.

Journal of Organic Chemistry published new progress about Alcohols Role: RCT (Reactant), RACT (Reactant or Reagent). 403-41-8 belongs to class alcohols-buliding-blocks, and the molecular formula is C8H9FO, Related Products of 403-41-8.

Referemce:
Alcohol – Wikipedia,
Alcohols – Chemistry LibreTexts