Tag: M.W=100-150

Zhou, Minghao published the artcileCyclic diethers and short-range solvation: a bifurcated hydrogen-bond model for ether-amine bonding, HPLC of Formula: 1193-11-9, the publication is Journal of Molecular Structure (1992), 187-96, database is CAplus.

Short-range solvation, the effect on solute properties of hydrogen bonding between solute and solvent, has been studied using ethers as the electron-donating solvents, and using the equilibrium constant (K_PT) for the formation of the proton transfer complex between 2,4-dinitrophenol and diethylamine (the proton donor) as a probe. The equilibrium constants (K_SR) for the formation of the solvent-amine hydrogen bond indicate that the tendency for both 5- and 6-membered ring diethers to solvate the amines is 10-20 fold greater than for a noncyclic or cyclic monoether, or a noncyclic diether. It is proposed that the cyclic diether forms a bifurcated hydrogen bond involving both oxygen atoms of the diether. The formation of the short-range solvation structure is affected by substituents on the dioxolane rings in a fashion consistent with the bifurcated bonding model.

Journal of Molecular Structure 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 C17H18N2O6, HPLC of Formula: 1193-11-9.

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

Liu, Zhaoyu published the artcileSynthesis and catalytic activity of a Strandberg-type molybdophosphate modified by organic cations, Quality Control of 177-10-6, the publication is Yingyong Huaxue (2015), 32(2), 214-220, database is CAplus.

A Strandberg-type molybdophosphate {H₄(H₂biim)₅(C(NH₂)₃)₄} [H₂P₂Mo₅O₂₃]₂ · 8H₂O (1, H₂biim = 2,2′-biimidazole) modified by 2,2′-biimidazole and guanidinium cations was self-assembled in aqueous solution of pH = 3-4 containing sodium molybdate, 2,2′-biimidazole, guanidine hydrochloride and an excess of phosphoric acid, and was characterized by single crystal X-ray diffraction anal., IR spectroscopy (FT-IR), themogravimetry-DTA (TG-DTA) and X-ray powder diffraction (XRD). Compound 1 has a stable 3D organic-inorganic hybrid framework. It was used as a catalyst for carbonyl-protection. The synthesis of cyclohexanone ethylene ketal was performed as an example to investigate some influence factors on the yield, such as catalyst loading, molar ratio of reactants and reaction time. The optimal conditions are: the molar ratio of catalyst (based on Mo) to ketone is 1:300, the molar ratio of ketone to alc. is 1:1.4, and reaction time is 2.5 h. The catalytic activity of compound 1 for the synthesis of four other ketals was evaluated. The results show that compound 1 is a better catalyst for the synthesis of cyclohexanone ethylene ketal.

Yingyong Huaxue 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, Quality Control of 177-10-6.

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

Yang, Shuijin published the artcileCatalytic synthesis of cyclohexanone ethylene ketal with H₃PW₁₂O₄₀/TiO₂-SiO₂, Application In Synthesis of 177-10-6, the publication is Jingxi Shiyou Huagong Jinzhan (2014), 15(6), 48-50, 54, database is CAplus.

Cyclohexanone and ethylene glycol were used to synthesize cyclohexanone ethylene ketal with H₃PW₁₂O₄₀/TiO₂-SiO₂ as the catalyst which was prepared with method of impregnation. The effects of the molar ratio of cyclohexanone to ethylene glycol, catalyst usage, and reaction time on the yield were studied in experiment The results of experiment have shown that H₃PW₁₂O₄₀/TiO₂-SiO₂ is a good catalyst for the synthesis of cyclohexanone ethylene ketal. The optimum synthesis conditions were identified : n (cyclohexanone) : n (ethylene glycol) = 1 : 1.4, catalyst usage is 0.8% of the total mass of reaction materials, and the usage of cyclohexane, i.e. the water carrying agent, is 6 mL. The yield of cyclohexanone ethylene ketal reaches 77.6% at such conditions.

Jingxi Shiyou Huagong Jinzhan 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 C8H16N2O, Application In Synthesis of 177-10-6.

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

Koz, F. Ferda Yilmaz published the artcileAntioxidant and antimicrobial activities of Codium fragile (Suringar) Hariot (Chlorophyta) essential oil and extracts, HPLC of Formula: 1193-11-9, the publication is Asian Journal of Chemistry (2009), 21(2), 1197-1209, database is CAplus.

Macroalgae are rich sources of natural bioactive products. Their secondary metabolites are attracted attends in many fields of life i.e., food, animal feeding, textile, cosmetics, medicine etc. In this study, methanol, dichloromethane and hexane extracts of Codium fragile (Chlorophyta) were tested for antimicrobial and antioxidant activities. Antioxidant effects were evaluated by hydroxyl radical scavenging assay (deoxyribose degradation assay) and β-carotene bleaching assay. The extracts indicated relatively little antioxidant activities, as compared to com. antioxidants. The composition of the essential oil of C. fragile was also analyzed by GC and GC-MS. Twenty four compounds were identified of C. fragile essential oil and n-tricosane (11.88 %) was determined as major component. Essential oil of C. fragile showed weak antibacterial activity against all gram pos. bacteria tested, except methicillin-oxacillin resistant Staphylococcus aureus ATCC 43300. Similarly, all the extracts of C. fragile showed weak antimicrobial activity on tested organisms.

Asian 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, HPLC of Formula: 1193-11-9.

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

Demirel, Zeliha published the artcileAntimicrobial and antioxidant activity of brown algae from the Aegean Sea, Recommanded Product: 2,2,4-Trimethyl-1,3-dioxolane, the publication is Journal of the Serbian Chemical Society (2009), 74(6), 619-628, database is CAplus.

The present study was conducted to evaluate the antioxidant and anti-microbial activity of methanol, dichloromethane and hexane extracts, as well as the essential oils of brown algae (Phaeophyta) Colpomenia sinuosa, Dictyota dichotoma, Dictyota dichotoma var. implexa, Petalonia fascia and Scytosiphon lomentaria. The essential oil of the macroalgae was obtained by steam distillation and analyzed by GC and GC/MS. The antioxidant activity of the algal extracts was determined using the procedures of inhibition of β-carotene bleaching and ABTS⁺ methods. The antioxidant effects of the extracts were compared with those of com. antioxidants, such as butylated hydroxytoluene (BHT), butylated hydroxyanisol (BHA) and α-tocopherol. The hexane extracts of D. dichofoma var. implexa had a higher phenolic content than the other extracts The dichloromethane extract of S. lomentaria was found to be more active in the decolorization of ABTS⁺ than the other extracts and generally the dichloromethane extracts were more active than the methanol and hexane extracts Antimicrobial activities of the extracts were assessed against Gram (+) and Gram (-) bacteria and one yeast strain by the disk diffusion method. According to the results, the dichloromethane extracts generally showed more potent antimicrobial activity than the methanol and hexane extracts at concentrations 1.5 and 1.0 mg/disk.

Journal of the Serbian Chemical Society 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, Recommanded Product: 2,2,4-Trimethyl-1,3-dioxolane.

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

Huang, Yong Kui published the artcileCatalytic application of H₃PW₆Mo₆O₄₀/SiO₂ in synthesis of acetals and ketals, Product Details of C8H14O2, the publication is Advanced Materials Research (Durnten-Zurich, Switzerland) (2012), 304-307, database is CAplus.

Novel catalyst H₃PW₆Mo₆O₄₀/SiO₂ was prepared by a sol-gel technique and its catalytic application in synthesis of acetals and ketals was tested. Conditions for preparation of the catalyst were optimized by using the orthogonal exptl. design. The optimum conditions are: the mass ratio of H₃PW₆Mo₆O₄₀ to SiO₂ is 0.4, calcination temperature is 150 °C and calcination time is 3 h. The steric properties of the reactants play an important role in the acetalization. The catalytic activity of the catalyst decreases when the size of the reactant increased. Although a decrease in catalytic activity was observed with its subsequent reuse, the catalyst could be reused at least four times without any other treatments. The results reveal that the H₃PW₆Mo₆O₄₀/SiO₂ catalysis generally results in good yields of acetals and ketals under mild reaction conditions.

Advanced Materials Research (Durnten-Zurich, Switzerland) 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, Product Details of C8H14O2.

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

Yang, Shuijin published the artcileSynthesis of acetals and ketals catalyzed by H₄SiW₆Mo₆O₄₀/SiO₂, Computed Properties of 177-10-6, the publication is Advanced Materials Research (Durnten-Zurich, Switzerland) (2012), 430-432(Pt. 1), 289-292, database is CAplus.

Heterogeneous acid catalyst, H₄SiW₆Mo₆O₄₀/SiO₂ was synthesized by a sol-gel technique. Catalytic application of the catalyst for synthesis of acetals and ketals were tested. The variation of different reaction parameters on the yield of acetals and ketals were also studied. The yields of acetals and ketals can reach 80.0%∼96.9% at the optimized conditions. The high activity and stability of the catalyst is well retained after 4 runs. The results reveal that the H₄SiW₆Mo₆O₄₀/SiO₂ catalysis is a novel, effective and reusable catalyst for synthesizing acetals and ketals.

Advanced Materials Research (Durnten-Zurich, Switzerland) 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 C14H26O2, Computed Properties of 177-10-6.

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

Salem, Mohamed Z. M. published the artcileGC/MS Analysis of Oil Extractives from Wood and Bark of Pinus sylvestris, Abies alba, Picea abies, and Larix decidua, Product Details of C8H14O2, the publication is BioResources (2015), 10(4), 7725-7737, database is CAplus.

Wood and bark oil extractives components (OECs) of Pinus sylvestris, Abies alba, Picea abies and Larix decidua grown in the Czech Republic were analyzed using gas chromatog./ mass spectrometry (GC/MS). The anal. showed the presence of monoterpene, sesquiterpene, diterpenoids, and resin acids. The highest percentages of OECs in the wood of P. sylvestris were α-fenchyl alc. (26.04%), D-fenchyl alc. (12.39%), and L-borneol (8.81%); the OECs in the bark included α-methyl-γ-butyrolactone (31.88%) and isodecyl octyl phthalate (15.85%). The most frequently occurring OEC in A. alba wood were 4-hydroxy-4-methyl-2-pentanone (73.36%), α-cedrol (10.08%), and 2,6-dimethyl-1,3,6-heptatriene (7.35%); the most OECs in the bark were di(2-ethylhexyl)phthalate (59.83%), Me cyclopentane (16.63%), and 13-epimanool (6.31%). P. abies wood OECs included 4-hydroxy-4-methyl-2-pentanone (29.42%), α-cedrol (26.98%), Δ-3-carene (6.08%), and terpinen-4-ol (5.42%); the most OECs in the bark were di(2-ethylhexyl)phthalate (30.91%), cyclohexane (12.89%), caryophyllene oxide (8.90%), and α-pinene (4.59%). OECs of L. decidua wood were α-terpineol (26.06%), isoborneol (14.12%), camphene (11.78%), D-fenchyl alc. (10.39%), and larixol (4.85%); OECs in the bark were larixol (33.29%), phthalic acid mono-2-ethylhexyl ester (16.96%), 13-epimanool (15.40%), and cyclohexane (8.44%).

BioResources 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, Product Details of C8H14O2.

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

Shao, Linjun published the artcileSulfonic groups functionalized preoxidated polyacrylonitrile nanofibers and its catalytic applications, Application In Synthesis of 177-10-6, the publication is Applied Catalysis, A: General (2012), 133-137, database is CAplus.

A SO₃H-bearing nanofiber mat was synthesized and investigated as a novel heterogeneous acid catalyst. Preoxidated polyacrylonitrile nanofiber mat was prepared via electrospinning and heat treatment, and then reacted with chlorosulfuric acid to introduce the sulfonic groups. The nanofiber mat owned high acidity of 2.99 mmol/g. The preoxidation and sulfonation were examined by FT-IR spectroscopy, elemental anal. and X-ray diffraction spectroscopy (XRD). The fiber morphologies were characterized by SEM (SEM). The catalytic activities and reuse of the prepared nanofiber mat solid acid catalyst have been evaluated for the acetalization and esterification. The regular fiber mat structure could significantly facilitate the recovery and reuse of the catalyst. The excellent catalytic performance and easy recycling made the novel fiber mat solid acid hold great potential for the green chem. processes.

Applied Catalysis, A: General 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 C7H13NO2, Application In Synthesis of 177-10-6.

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

Shao, Lin-Jun published the artcileSynthesis of melamine-formaldehyde resin functionalized with sulfonic groups and its catalytic activities, HPLC of Formula: 177-10-6, the publication is Chemical Papers (2014), 68(7), 983-988, database is CAplus.

Spherical melamine-formaldehyde resin (MFR) particles were synthesized using the condensation reaction of melamine and formaldehyde with PEG-2000 as an additive. After thermal treatment at 200°C and then sulfonation by chlorosulphuric acid, an MFR-supported strong acid catalyst (SMFR) was prepared with an acidity of 3.23 mmol g^-1. This new acid catalyst was evaluated in the reactions of esterification and acetalization, with the results indicating that this novel acid catalyst was highly efficient in the traditional acid-catalyzed reaction. Its high activity, stability and reusability give it great potential for “green” chem. processes.

Chemical Papers 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 C5H12O2, HPLC of Formula: 177-10-6.

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