Day: November 25, 2022

Kujala, Tytti S. published the artcileBetalain and phenolic compositions of four beetroot (Beta vulgaris) cultivars, Related Products of dioxole, the publication is European Food Research and Technology (2002), 214(6), 505-510, database is CAplus.

Four cultivars of red beetroot (Beta vulgaris) were evaluated with respect to their betalain and phenolic contents. The compounds were analyzed using HPLC and identified by HPLC-DAD, HPLC-ESI-MS and NMR techniques. Betalains (vulgaxanthins I and II, betanin and isobetanin) and phenolics [5,5′,6,6′-tetrahydroxy-3,3′-biindolyl, feruloylglucose and β-D-fructofuranosyl-α-D-(6-O-(E)-feruloylglucopyranoside)] were determined in different parts of the root; betalains were analyzed sep. in the water extract and phenolics in the fractionated 80% aqueous methanol extract (betalain-free water fraction). In each cultivar, both betanin and isobetanin were found in greater amounts in the peel than in the flesh. A similar trend was not observed in the distribution of vulgaxanthins. The three studied phenolics appeared in all root parts of the beetroot cultivars with the flesh generally containing the least content. Addnl., two phenolic amides (N-trans-feruloyltyramine and N-trans-feruloylhomovanillylamine) and four flavonoids (betagarin, betavulgarin, cochliophilin A and dihydroisorhamnetin) were detected in the fractionated 80% aqueous methanol peel extracts (acetonitrile fraction) of beetroot.

European Food Research and Technology published new progress about 110204-45-0. 110204-45-0 belongs to dioxole, auxiliary class Flavonoids, name is 9-Hydroxy-6-phenyl-8H-[1,3]dioxolo[4,5-g]chromen-8-one, and the molecular formula is C16H10O5, Related Products of dioxole.

Referemce:
https://en.wikipedia.org/wiki/1,3-Benzodioxole,
Dioxole | C3H4O2 – PubChem

Moreno, Jose Maria published the artcileMOFs based on 1D structural sub-domains with Bronsted acid and redox active sites as effective bi-functional catalysts, Quality Control of 68527-74-2, the publication is Catalysis Science & Technology (2020), 10(11), 3572-3585, database is CAplus.

A novel family of lamellar MOF-type materials, which contain Bronsted acid sites together with redox active centers, based on assembled 1D organic-inorganic nanoribbons were obtained through direct solvothermal synthesis routes, using specific monotopic benzylcarboxylate spacers with thiol substituents in the para-position like structural modulator compounds and effective post-synthesis oxidized treatments to generate accessible sulfonic groups. Low-dimensional aluminum metal-organic materials, containing free sulfonic pendant groups (Al-ITQ-SO₃H), were successfully tested in several acid reactions, such as acetalization, esterification and ring opening of epoxides with a significant impact on fine chem. processes. The direct introduction of stabilized Pd nanoparticles, cohabitating with pendant sulfonic groups, allowed the preparation of active bi-functional MOF-type hybrid materials (Al-ITQ-SO₃H/Pd) capable of carrying out one-pot two-step oxidation-acetalization reactions, exhibiting high yield and high activity during consecutive catalytic cycles.

Catalysis Science & Technology published new progress about 68527-74-2. 68527-74-2 belongs to dioxole, auxiliary class Dioxolane,Benzene,Phenol,Ether, name is 2-Methoxy-4-(4-methyl-1,3-dioxolan-2-yl)phenol, and the molecular formula is C11H14O4, Quality Control of 68527-74-2.

Referemce:
https://en.wikipedia.org/wiki/1,3-Benzodioxole,
Dioxole | C3H4O2 – PubChem

Cabrera, A. published the artcile1,3-Dioxolane formation with a montmorillonite-type clay catalyst, Safety of 2,2,4-Trimethyl-1,3-dioxolane, the publication is Journal of Molecular Catalysis (1992), 75(1), 101-7, database is CAplus.

The coupling reaction of oxiranes with carbonyl compounds to produce 1,3-dioxolanes was promoted by catalytic amounts of a bentonitic clay. The product yield was found to be dependent on the catalyst, the reaction temperature and the reagent concentrations Thus, ethylene oxide (I) reacted with MeCOMe in the presence of the clay to give 2,2-dimethyl-1,3-dioxolane in 96% yield. Reacting I with MeCO(CH₂)₂Me gave 2-methyl-2-propyl-1,3-dioxolane in 25% yield. A kinetic study performed with acetone and ethylene oxide showed a first-order dependence in both reagents. Other experiments made with different epoxides, carbonyl compounds and catalysts are also discussed.

Journal of Molecular Catalysis published new progress about 1193-11-9. 1193-11-9 belongs to dioxole, auxiliary class Dioxolanes, name is 2,2,4-Trimethyl-1,3-dioxolane, and the molecular formula is C6H12O2, Safety of 2,2,4-Trimethyl-1,3-dioxolane.

Referemce:
https://en.wikipedia.org/wiki/1,3-Benzodioxole,
Dioxole | C3H4O2 – PubChem

Sipes, I. G. published the artcileHydroxy- and alkoxy-substituted benzyl derivatives (addendum), Quality Control of 68527-74-2, the publication is WHO Food Additives Series (2009), 533-548, database is CAplus.

A review discusses the assessment of dietary exposure, absorption, distribution, metabolism, and safety of hydroxy- and alkoxy-substituted benzyl derivatives for use as flavoring agents. The acute toxicity, genotoxicity, and reproductive/developmental toxicity of these flavoring agents are also tackled.

WHO Food Additives Series published new progress about 68527-74-2. 68527-74-2 belongs to dioxole, auxiliary class Dioxolane,Benzene,Phenol,Ether, name is 2-Methoxy-4-(4-methyl-1,3-dioxolan-2-yl)phenol, and the molecular formula is C12H9NO, Quality Control of 68527-74-2.

Referemce:
https://en.wikipedia.org/wiki/1,3-Benzodioxole,
Dioxole | C3H4O2 – PubChem

Gayubo, A. G. published the artcilePyrolytic lignin removal for the valorization of biomass pyrolysis crude bio-oil by catalytic transformation, Computed Properties of 1193-11-9, the publication is Journal of Chemical Technology and Biotechnology (2010), 85(1), 132-144, database is CAplus.

BACKGROUND: The catalytic processes for valorizing the bio-oil obtained from lignocellulosic biomass pyrolysis face the problem that a great amount of carbonaceous material is deposited on the catalyst due to the polymerization of phenol-derived compounds in the crude bio-oil. This carbonaceous material blocks the catalytic bed and contributes to rapid catalyst deactivation. This paper studies an online two-step process, in which the first one separates the polymerizable material and produces a reproducible material whose valorization is of com. interest. RESULTS: The establishment of a step for pyrolytic lignin deposition at 400 °C avoids the blockage of the online catalytic bed and attenuates the deactivation of a HZSM-5 zeolite based catalyst used for hydrocarbon production The origin of catalyst deactivation is coke deposition, which has two fractions (thermal and catalytic), whose content is attenuated by prior pyrolytic lignin separation and by co-feeding methanol. The morphol. and properties of the material deposited in the first step (pyrolytic lignin) are similar to lignins obtained as a byproduct in wood pulp manufacturing CONCLUSIONS: The proposed reaction strategy, with two steps (thermal and catalytic) in series, valorizes the crude bio-oil by solving the problems caused by the polymerization of phenolic compounds, which are obtained in the pyrolysis of the lignin contained in lignocellulosic biomass. Given that a byproduct (pyrolytic lignin) is obtained with similar properties to the lignin from wood pulping manufacturing, the perspectives for the viability of lignocellulosic biomass valorization are promising, which is essential for furthering its implementation in biorefinery processes. Copyright © 2009 Society of Chem. Industry.

Journal of Chemical Technology and Biotechnology published new progress about 1193-11-9. 1193-11-9 belongs to dioxole, auxiliary class Dioxolanes, name is 2,2,4-Trimethyl-1,3-dioxolane, and the molecular formula is C6H12O2, Computed Properties of 1193-11-9.

Referemce:
https://en.wikipedia.org/wiki/1,3-Benzodioxole,
Dioxole | C3H4O2 – PubChem

Matsushita, Kohei published the artcileA 13-week subchronic toxicity study of vanillin propylene glycol acetal in F344 rats, Recommanded Product: 2-Methoxy-4-(4-methyl-1,3-dioxolan-2-yl)phenol, the publication is Food and Chemical Toxicology (2019), 110643, database is CAplus and MEDLINE.

Vanillin propylene glycol acetal (VPGA) has been used as a flavoring agent. Here, we performed a 13-wk subchronic toxicity study of VPGA in F344 rats with oral administration by gavage at doses of 0, 100, 300, and 1000 mg/kg body weight (BW)/day. In the 1000 mg/kg BW group, loss of vigorous activity and listlessness immediately after administration were observed for both sexes throughout the exptl. period. Reduction of body weight gain was noted in both sexes at 1000 mg/kg BW. Serum biochem. demonstrated significant increases in total protein, albumin, total cholesterol, calcium, inorganic phosphorus, and γ-glutamyl transpeptidase in both sexes at 1000 mg/kg BW and increases in the albumin/globulin ratio and urea nitrogen in the male 1000 mg/kg BW group. A significant increase in relative liver weight was detected in both sexes at 1000 mg/kg BW. Histopathol., centrilobular hepatocellular hypertrophy in the liver was observed in both sexes at 1000 mg/kg BW. In addition, the incidence of fatty changes in hepatocytes in the male 1000 mg/kg BW group was decreased compared with that in the control. Based on these results, the no-observed-adverse-effect level for VPGA was evaluated to be 300 mg/kg BW/day for both sexes in the current study.

Food and Chemical Toxicology published new progress about 68527-74-2. 68527-74-2 belongs to dioxole, auxiliary class Dioxolane,Benzene,Phenol,Ether, name is 2-Methoxy-4-(4-methyl-1,3-dioxolan-2-yl)phenol, and the molecular formula is C11H14O4, Recommanded Product: 2-Methoxy-4-(4-methyl-1,3-dioxolan-2-yl)phenol.

Referemce:
https://en.wikipedia.org/wiki/1,3-Benzodioxole,
Dioxole | C3H4O2 – PubChem

Cheng, Shengxian published the artcileCrystallinity after decarboxylation of a metal-carboxylate framework: indestructible porosity for catalysis, Safety of 1,4-Dioxaspiro[4.5]decane, the publication is Dalton Transactions (2020), 49(34), 11902-11910, database is CAplus and MEDLINE.

We report a curious case study of a Zr(IV)-carboxylate framework, which retains significant crystalline order after cascade thermocyclization of its linker components, and – more notably – after the crucial carboxylate links were severed by heat. Vigorous heat treatment (e.g., 450°C and above) benzannulates the multiple alkyne groups on the linker to generate linked nanographene blocks and to afford real stability. The resultant Zr oxide/nanographene hybrid solid is stable in saturated NaOH and concentrated H₃PO₄, allowing a convenient anchoring of H₃PO₄ into its porous matrix to enable size-selective heterogeneous acid catalysis. The Zr oxide components can also be removed by strong hydrofluoric acid to further enhance the surface area (up to 650 m² g^-1), without collapsing the nanographene scaffold. The crystallinity order and the extensive thermal transformations were characterized by X-ray diffraction, scanning transmission electron microscopy (STEM), IR, solid state NMR and other instrumental methods.

Dalton Transactions published new progress about 177-10-6. 177-10-6 belongs to dioxole, auxiliary class Dioxolane,Spiro, name is 1,4-Dioxaspiro[4.5]decane, and the molecular formula is C8H14O2, Safety of 1,4-Dioxaspiro[4.5]decane.

Referemce:
https://en.wikipedia.org/wiki/1,3-Benzodioxole,
Dioxole | C3H4O2 – PubChem

Peng, Anshun published the artcileSynthesis of vanillin propylene glycol acetal using calcium methanesulfonate as catalyst, Application In Synthesis of 68527-74-2, the publication is Huaxue Shijie (2005), 46(12), 752-753, database is CAplus.

Vanillin propylene acetal was synthesized using vanillin and propylene glycol as starting materials and Ca methanesulfonate as catalyst. Factors influencing the yield were examined The optimum conditions were as follows: vanillin: 1,2-propanediol : catalyst : dehydration agent 0.15 mol : 0.225 mol : 1.00 g : 15 mL and refluxing for 3.0 h. The yield was above 87.5% under optimum conditions.

Huaxue Shijie published new progress about 68527-74-2. 68527-74-2 belongs to dioxole, auxiliary class Dioxolane,Benzene,Phenol,Ether, name is 2-Methoxy-4-(4-methyl-1,3-dioxolan-2-yl)phenol, and the molecular formula is C11H14O4, Application In Synthesis of 68527-74-2.

Referemce:
https://en.wikipedia.org/wiki/1,3-Benzodioxole,
Dioxole | C3H4O2 – PubChem

Schnurpfeil, D. published the artcileLiquid-phase oxidation of 1,3-dioxolanes, Quality Control of 1193-11-9, the publication is Journal fuer Praktische Chemie/Chemiker-Zeitung (1994), 336(2), 155-9, database is CAplus.

The oxidation rate and the kind of oxidation products in the oxidation reactions of the 1,3-dioxolanes with mol. oxygen in liquid phase were investigated. The 2-methyl-substituted 1,3-dioxolane has a lower, the 4-methyl-substituted 1,3-dioxolane has a higher oxidation rate than the non-substituted 1,3-dioxolane. The 2,2-disubstituted 1,3-dioxolanes show no oxidation but a hydrolytic reaction. The main-products of the liquid-phase oxidation of the 1,3-dioxolanes are the glycolcarbonic acid monoesters and the 2-oxo-1,3-dioxolanes. Their formation is proved by gas chromatog., GC/MS-coupling, DC and ¹³C-NMR-spectroscopy.

Journal fuer Praktische Chemie/Chemiker-Zeitung published new progress about 1193-11-9. 1193-11-9 belongs to dioxole, auxiliary class Dioxolanes, name is 2,2,4-Trimethyl-1,3-dioxolane, and the molecular formula is C6H12O2, Quality Control of 1193-11-9.

Referemce:
https://en.wikipedia.org/wiki/1,3-Benzodioxole,
Dioxole | C3H4O2 – PubChem

Gelas, Jacques published the artcileStudies of cyclic acetals. XXV. Sulfur-containing heterobicycles derived from α-thioglycerol. Synthesis of alkyl-2,8-dioxa-6-thiabicyclo[3.2.1]octanes, Quality Control of 1193-11-9, the publication is Canadian Journal of Chemistry (1983), 61(7), 1487-93, database is CAplus.

I (R, R¹, R² = H, H, H; Me, H, H; Me, H, Me; Me, Me, H; Ph, H, H; H, H, Me; H, H, Ph) and II were prepared by one or more of four methods studied, e.g., cyclization of HOCH₂C(OH)R¹CH₂Cl with RCOCHR²Cl to give III, followed by cyclization with Na₂S.

Canadian Journal of Chemistry published new progress about 1193-11-9. 1193-11-9 belongs to dioxole, auxiliary class Dioxolanes, name is 2,2,4-Trimethyl-1,3-dioxolane, and the molecular formula is C6H12O2, Quality Control of 1193-11-9.

Referemce:
https://en.wikipedia.org/wiki/1,3-Benzodioxole,
Dioxole | C3H4O2 – PubChem