Tag: M.W=300-350

Lissi, Eduardo A. published the artcileTotal antioxidant potential of resinous exudates from Heliotropium species, and a comparison of the ABTS and DPPH methods, SDS of cas: 69097-99-0, the publication is Free Radical Research (1999), 30(6), 471-477, database is CAplus and MEDLINE.

Total reactive antioxidant potential (TRAP) of resinous exudates from Heliotropium species was evaluated by measuring the bleaching of stable free radicals. The antioxidant capacity of the resinous exudates in Trolox equivalent, evaluated from the bleaching of ABTS derived radical cations, ranged from 2.0 M (H. huascoense) to 5.2 M (H. stenophyllum), indicating a very high concentration of phenolic compounds Considerably smaller values were obtained by measuring the bleaching of DPPH radicals. The ratio between the values obtained employing ABTS derived radicals and DPPH, ranged from 37 (H. megalanthum) to 4.5 (H. chenopodiaceum variety typica). The magnitude of the difference can be considered as an indication of the relative reactivity of the antioxidants present in the exudates. Similar ratios were observed when stoichiometric coefficients were evaluated for representative purified flavonoids obtained from the resinous exudates.

Free Radical Research published new progress about 69097-99-0. 69097-99-0 belongs to tetrahydropyran, auxiliary class Other Aliphatic Heterocyclic,Benzene,Phenol,Ether,Inhibitor, name is 5,7-Dihydroxy-2-(3-hydroxy-4-methoxyphenyl)chroman-4-one, and the molecular formula is C16H14O6, SDS of cas: 69097-99-0.

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

Shi, Yanyan published the artcilePreparation of a permethylated β-cyclodextrin chiral stationary phase by one-pot hydrosilylation and immobilization at the C2 position for chiral high-performance liquid chromatography, Application In Synthesis of 69097-99-0, the publication is Journal of Separation Science (2015), 38(21), 3669-3676, database is CAplus and MEDLINE.

A novel cyclodextrin intermediate, mono-2^A-allylcarbamido-2^A-deoxy-permethylated β-cyclodextrin, was synthesized by reacting allylamine and newly prepared mono-2^A-azido-2^A-deoxy-permethylated β-cyclodextrin by the Staudinger reaction and anchored onto porous silica beads by a 1-pot hydrosilylation and immobilization procedure to afford a novel chiral stationary phase. This stationary phase acts as a new member of the previous chiral stationary phase series immobilized on the cyclodextrin C2 position. This stationary phase depicted enantiomeric separation abilities toward bicyclic and tricyclic racemates under reversed-phase conditions. The resolutions for hesperetin and naringenin achieved on the current phase reached 3.91 and 1.11, resp., much higher than the previous permethylated β-cyclodextrin with the linkage at the C6 position.

Journal of Separation Science published new progress about 69097-99-0. 69097-99-0 belongs to tetrahydropyran, auxiliary class Other Aliphatic Heterocyclic,Benzene,Phenol,Ether,Inhibitor, name is 5,7-Dihydroxy-2-(3-hydroxy-4-methoxyphenyl)chroman-4-one, and the molecular formula is C18H10, Application In Synthesis of 69097-99-0.

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

Lai, Xiang-Hua published the artcileConvenient synthesis of mono(6^A-N-allyl-amino-6^A-deoxy)permethylated β-cyclodextrin: a promising chiral selector for an HPLC chiral stationary phase, Quality Control of 69097-99-0, the publication is Tetrahedron Letters (2004), 45(23), 4469-4472, database is CAplus.

Mono(6-(p-toluenesulfonyl))permethylated β-cyclodextrin, a versatile precursor for a wide variety of mono-functionalized permethyl β-cyclodextrins, has been generated successfully by the direct methylation of mono-tosylated cyclodextrin. This afforded a convenient synthesis of mono(6^A-N-allyl-amino-6^A-deoxy)permethylated β-cyclodextrin. Hydrosilylation of the chiral selector with (EtO)₃SiH and reaction of the resultant reactive siloxane with pristine silica gel afforded a facile entry into a structurally well-defined chiral HPLC stationary phase.

Tetrahedron Letters published new progress about 69097-99-0. 69097-99-0 belongs to tetrahydropyran, auxiliary class Other Aliphatic Heterocyclic,Benzene,Phenol,Ether,Inhibitor, name is 5,7-Dihydroxy-2-(3-hydroxy-4-methoxyphenyl)chroman-4-one, and the molecular formula is C16H14O6, Quality Control of 69097-99-0.

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

Lai, Xiang-Hua published the artcileEnantioseparation on mono(6^A-N-allylamino-6^A-deoxy)permethylated β-cyclodextrin covalently bonded silica gel, Application In Synthesis of 69097-99-0, the publication is Journal of Chromatography A (2004), 1059(1-2), 53-59, database is CAplus and MEDLINE.

A chiral selector, mono(6^A-N-allylamino-6^A-deoxy)permethylated β-cyclodextrin, was synthesized through a facile synthetic route and chem. immobilized onto porous silica gel via hydrosilylation to afford a cyclodextrin based chiral stationary phase MeCD-CSP. This chiral stationary phase exhibited good enantioselectivity under standard HPLC conditions. The optimal resolution of 1-(p-bromophenyl)ethanol and bromopheniramine was achieved under normal-phase conditions using a mobile phase comprising n-hexane and 2-propanol (IPA). The enantioseparation of warfarin, suprofen and flavanones under reversed-phase conditions were optimized and efficient enantioseparations for these analytes were obtained.

Journal of Chromatography A published new progress about 69097-99-0. 69097-99-0 belongs to tetrahydropyran, auxiliary class Other Aliphatic Heterocyclic,Benzene,Phenol,Ether,Inhibitor, name is 5,7-Dihydroxy-2-(3-hydroxy-4-methoxyphenyl)chroman-4-one, and the molecular formula is C16H14O6, Application In Synthesis of 69097-99-0.

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

Bankova, V. published the artcileChemical-ionization mass spectrometry with amines as reactant gases. I. Amine chemical ionization mass spectrometry of flavonoid aglycones, Synthetic Route of 69097-99-0, the publication is Organic Mass Spectrometry (1986), 21(3), 109-16, database is CAplus.

Chem. ionization mass spectrometry of 34 flavones, isoflavones, flavanones, chalcones and aurones with aliphatic amines and ammonia as reactant gases have been investigated. Some unusual ions have been obtained and are discussed. This method can be used to determine the type of flavonoid and the location of some functional groups in the mol.

Organic Mass Spectrometry published new progress about 69097-99-0. 69097-99-0 belongs to tetrahydropyran, auxiliary class Other Aliphatic Heterocyclic,Benzene,Phenol,Ether,Inhibitor, name is 5,7-Dihydroxy-2-(3-hydroxy-4-methoxyphenyl)chroman-4-one, and the molecular formula is C16H14O6, Synthetic Route of 69097-99-0.

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

Asztemborska, Monika published the artcileSeparation of some chiral flavanones by micellar electrokinetic chromatography, Application of 5,7-Dihydroxy-2-(3-hydroxy-4-methoxyphenyl)chroman-4-one, the publication is Electrophoresis (2003), 24(15), 2527-2531, database is CAplus and MEDLINE.

Micellar electrokinetic chromatog. (MEKC) was applied for enantioseparation of selected flavanones, including naringin, hesperidin, neohesperidin, naringenin, hesperetin, pinostrobin, isosakuranetin, eriodictyol, and homoeriodictyol. γ-Cyclodextrin (γ-CD) and sodium cholate (SCh) were used as chiral modifiers inducing enantio-selectivity to the background electrolyte. From among many studied selectors only these two appeared to possess the best enantioselective properties in respect to studied flavanones. The mechanisms of their action are a little different; SCh used above critical micelle point concentration forms chiral micelles itself while γ-CD is deprived of this property and requires addition of surfactants as, e.g., sodium dodecyl sulfate. SCh enables separation of flavanone glycosides diastereomers while separation of enantiomers of flavanone aglycons may be achieved with γ-CD. Consideration of structural relation led to the suggestion that interaction of sugar moiety of glycosides with SCh micelles give rise to chiral recognition. MEKC appeared to be a suitable and efficient anal. tool to follow enantiomeric composition of flavanones.

Electrophoresis published new progress about 69097-99-0. 69097-99-0 belongs to tetrahydropyran, auxiliary class Other Aliphatic Heterocyclic,Benzene,Phenol,Ether,Inhibitor, name is 5,7-Dihydroxy-2-(3-hydroxy-4-methoxyphenyl)chroman-4-one, and the molecular formula is C16H14O6, Application of 5,7-Dihydroxy-2-(3-hydroxy-4-methoxyphenyl)chroman-4-one.

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

Kessberg, Anton published the artcileEnantioselective Synthesis of 2′- and 3′-Substituted Natural Flavans by Domino Asymmetric Transfer Hydrogenation/Deoxygenation, Recommanded Product: 5,7-Dihydroxy-2-(3-hydroxy-4-methoxyphenyl)chroman-4-one, the publication is Organic Letters (2016), 18(24), 6500-6503, database is CAplus and MEDLINE.

A concise and highly enantioselective synthesis of the natural flavans kazinol U and (2S)-7,3′-dihydroxy-4′-methoxyflavan is reported for the first time. The key transformation is a single-step conversion of a racemic flavanone to a flavan by means of an asym. transfer hydrogenation/deoxygenation cascade with kinetic resolution

Organic Letters published new progress about 69097-99-0. 69097-99-0 belongs to tetrahydropyran, auxiliary class Other Aliphatic Heterocyclic,Benzene,Phenol,Ether,Inhibitor, name is 5,7-Dihydroxy-2-(3-hydroxy-4-methoxyphenyl)chroman-4-one, and the molecular formula is C16H14O6, Recommanded Product: 5,7-Dihydroxy-2-(3-hydroxy-4-methoxyphenyl)chroman-4-one.

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

Deka, Nabajyoti published the artcileMicrowave mediated solvent-free acetylation of deactivated and hindered phenols, Category: tetrahydropyran, the publication is Green Chemistry (2001), 3(5), 263-264, database is CAplus.

Deactivated and sterically hindered phenols have been acetylated with acetic anhydride under microwave irradiation using iodine as catalyst in an eco-friendly process. The reaction was carried out under solvent-free conditions and the acetates were obtained in nearly quant. yields with dramatic reduction of reaction time compared to standard oil-bath heating.

Green Chemistry published new progress about 69097-99-0. 69097-99-0 belongs to tetrahydropyran, auxiliary class Other Aliphatic Heterocyclic,Benzene,Phenol,Ether,Inhibitor, name is 5,7-Dihydroxy-2-(3-hydroxy-4-methoxyphenyl)chroman-4-one, and the molecular formula is C16H14O6, Category: tetrahydropyran.

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

Zhang, Xia-Wei published the artcileDissection of Pharmacological Mechanism of Chinese Herbal Medicine Yihuo Huatan Formula on Chronic Obstructive Pulmonary Disease: A Systems Pharmacology-Based Study, SDS of cas: 69097-99-0, the publication is Scientific Reports (2019), 9(1), 1-11, database is CAplus and MEDLINE.

Chronic obstructive pulmonary disease (COPD) is one of the most common respiratory diseases. Yihuo Huatan Formula (YHF), as a proven Chinese Herbal Medicine (CHM), has been verified to be effective in the treatment of stable COPD through years’ of practice. Nevertheless, its working mechanism is still unclear. We sought to systematically decipher the mechanism of YHF for treating stable COPD using systems pharmacol.-based method that integrates pharmacokinetic screening, target prediction, network analyses, GO and KEGG enrichment analyses. Firstly, a total of 1267 chems. out of 15 herbal components were included in YHF chem. database. Among them, 180 potential active mols. were screened out through pharmacokinetic evaluation. Then 258 targets of the active mols. were predicted, of which 84 were chosen for further analyses. Finally, the network analyses and GO and KEGG enrichment methods suggested a therapeutic effect of YHF on the alleviation of airway inflammation, decrease of mucus secretion, maintenance of immune homeostasis and benefit of COPD comorbidities, by regulating multiple targets and pathways. The systems pharmacol.-based approach helps to understand the underlying working mechanism of YHF in stable COPD from a holistic perspective, and offers an exemplification for systematically uncovering the action mechanisms of CHM.

Scientific Reports published new progress about 69097-99-0. 69097-99-0 belongs to tetrahydropyran, auxiliary class Other Aliphatic Heterocyclic,Benzene,Phenol,Ether,Inhibitor, name is 5,7-Dihydroxy-2-(3-hydroxy-4-methoxyphenyl)chroman-4-one, and the molecular formula is C18H10F3NO3S2, SDS of cas: 69097-99-0.

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