Tag: M.W=100-150

Du, Jing published the artcileSynthesis and catalytic activities of two new extended Preyssler-type tungstophosphates with different cavity centers, Synthetic Route of 177-10-6, the publication is Inorganic Chemistry Communications (2016), 119-123, database is CAplus.

Two new extended Preyssler-type polyoxometalates (POMs) constructed by Fe(III), 2,2′-biimidazole and Preyssler-type tungstophosphate anions with Na and Ag cavity centers, resp., {(H₄biim)₅H[Fe(H₂biim)(H₂O)₂(ZP₅W₃₀O₁₁₀)]·17H₂O}_n (Z = Na, 1; Z = Ag, 2; H₂biim = 2,2′-biimidazole), were designed and synthesized under hydrothermal conditions, and were systematically characterized by physicochem. and spectroscopic methods. The two compounds are isostructural coordination polymers. In compound 1 or 2, there exists interesting infinite 1-dimensional chains composed of Preyssler-type [ZP₅W₃₀O₁₁₀]^14- (abbreviated as {ZP₅W₃₀}) polyanions bridged by Fe(III)-complex fragments, and these chains further formed 3-dimensional supramol. frameworks via extensive H-bonding interactions. For 2, two types of transition metals, i.e. one Ag⁺ ion as a center in the inner cavity and two Fe³⁺ ions as modified cations on the outer surface of one {ZP₅W₃₀} unit, exist in the same compound Also, the electrochem. behaviors and acid catalytic activities of 1 and 2 were studied.

Inorganic Chemistry Communications 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, Synthetic Route of 177-10-6.

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

Alikarami, Mohammad published the artcileOxidative deprotection of trimethylsilyl and tetrahydropyranyl ethers, acetals and ketals with N,N’-dibenzyl-1,4-diazoniabicyclo[2.2.2]octane peroxodisulfate under non-aqueous conditions, Name: 1,4-Dioxaspiro[4.5]decane, the publication is Organic Chemistry: An Indian Journal (2013), 9(11), 463-468, database is CAplus.

An efficient and convenient conversion of trimethylsilyl and tetrahydropyranyl ethers, acetals and ketals to the corresponding carbonyl compounds with N,N’-dibenzyl-1,4-diazoniabicyclo[2.2.2]octane peroxodisulfate under non-aqueous conditions is described.

Organic Chemistry: An Indian Journal 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, Name: 1,4-Dioxaspiro[4.5]decane.

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

Anteunis, M. published the artcileNuclear magnetic resonance experiments on ketals. III. Proton magnetic resonance (P.M.R.) spectrum and conformations of the glycol ketal of 1,2-propanediol with acetone and acetaldehyde, Safety of 2,2,4-Trimethyl-1,3-dioxolane, the publication is Bulletin des Societes Chimiques Belges (1964), 73(11-12), 889-97, database is CAplus.

cf. CA 61, 10570h. The H N.M.R. (P.M.R.) spectra of 2,2,4-trimethyl-1,3-dioxolane (I) and cis- and trans-2,4-dimethyl-1,3-dioxolane (II) were determined and analyzed. The chem. shifts are in accordance with a half-chair conformation. The 1,3-H-Me interaction causes an upfield shift of ∼0.15 ppm. when the 2 are cis to one another. A similar shift of 0.05 ppm. was noted for a cis-1,3-Me-Me interaction. In I and cis-II, long-range coupling between the 4-Me and the methylene H cis to it is observed. I (b. 100°) was prepared from Me₂C(OMe)₂ (0.3 moles), propanediol (III) (0.2 moles), and H₂SO₄ catalyst. II was prepared by slow distillation of MeCH0 from acidified paraldehyde into III. Separation of the product by gas-liquid chromatography gave cis-II, b. 91.8°, n²⁵ 1.3945, d_23.6 0.92786, m. 55-60°; and trans-II, b. 89.5°, n²⁵ 1.3928; d_23.0 0.91570. meso4,5-Dimethyl-1,3-dioxolane (b. 104°) was prepared by azeotropic H₂O removal with C₆H₆ from a mixture of monobutanediol and (HCHO)_x. The HCHO ketal of 4,5-trimethylene-1,3-dioxolane prepared similarly b. 80°/18 mm.

Bulletin des Societes Chimiques Belges 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

Hassner, Alfred published the artcileA mild, room-temperature protection of ketones and aldehydes as 1,3-dioxolanes under basic conditions, COA of Formula: C8H14O2, the publication is Synlett (2012), 23(19), 2773-2776, database is CAplus.

Protection of ketones or aldehydes as 1,3-dioxolane derivatives proceeds within minutes at room temperature in the presence of N-hydroxybenzenesulfonamide, its O-benzyl derivative, or the tosyl analog, in the absence of strong protonic acids, and in the presence of base (Et₃N). Acid-sensitive groups such as O-THP, O-TBS, or N-Boc are unaffected.

Synlett 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, COA of Formula: C8H14O2.

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

Yadav, Ram Naresh published the artcileA Versatile Method for the Protection of Carbonyl Compounds by Camphor Sulfonic Acid, Formula: C8H14O2, the publication is Current Organocatalysis (2018), 5(3), 196-200, database is CAplus and MEDLINE.

In this paper, camphor sulfonic acid-catalyzed protection of various carbonyl compounds is developed. This method is simple, environmentally friendly and yields products in high yields under mild reaction conditions. Camphor sulfonic acid is used as organocatalyst for the protection of carbonyl functionality. This catalyst is also employed for the protection of carbonyl functionality as thioacetal/mixed ketal in excellent yield.

Current Organocatalysis 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 C5H8N2O2, Formula: C8H14O2.

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

Abdallah, Samira A. published the artcileToxicological and phytochemical studies of wild plant Halocnemon strobilacium crude extracts and their components against Aphis craccivora Koch, SDS of cas: 1193-11-9, the publication is Journal of Applied Sciences Research (2009), 5(7), 699-705, database is CAplus.

Toxicol. and phytochem. studies were conducted on the Halocnemon strobilacium. Results indicated that the Et acetate crude extract with LC₅₀ value 0.159 mg/cm² and LC₉₅ value 1.845 mg/cm² was the most effective against Aphis craccivora comparing with fraction B (LC₅₀ 1.522 mg/cm² and LC₉₅ 4.721 mg/cm²) as well as fraction A (LC₅₀ 1.299 mg/cm² and LC₉₅ 3.899 mg/cm²). Data also showed that, the crude extract was composed mainly of saturated and unsaturated fatty acids and their esters (69.34%) followed by hydrocarbons (9.89%). Only two terpenes were identified in this crude extract, one of them was Phytol isomer, a diterpene detected with 2.26%. Oleic acid ester (38.18 %) and Octadecanoic acid (16.44%) were the major constituents. The main compounds in Fraction A were hydrocarbons, fatty acids and their esters. Lumiflavine represented about 35.66. Five fatty acids and esters were identified and constituted 39% with Oleic acid ester (14.74%) Octadecanoic acid Me ester (4.41%) and Tetradecanoic acid (3.88%) being the major representatives. In fraction B twenty three compounds were identified. Unoxygenated compounds amount to 9.89, the main hydrocarbons being di-Me undecane (5.20%) and trimethyldecane (1.01%). Oxygenated compounds constitute 90.11% of the fraction comprising fatty acids and esters, ketones as well as aldehydes (46.08%, 17.94% and 3.29% of the fraction resp.). The main ester identified was octadecanoic acid, Me ester (3.44%) while hexadecanoic acid was the main fatty acid detected (22.69%).

Journal of Applied Sciences Research 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, SDS of cas: 1193-11-9.

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

Adams, Richard D. published the artcileSynthesis of 1,3-dioxolanes by addition of ketones to epoxides with [Cp^*Ir(NCMe)₃]²⁺ as catalyst, Related Products of dioxole, the publication is Journal of Organometallic Chemistry (1999), 582(2), 358-361, database is CAplus.

The title reactions proceeded readily at 22°, and the yields were good. The following 1,3-dioxolanes were prepared: 2,2,4-trimethyl-1,3-dioxolane, 2,2-dimethyl-4-vinyl-1,3-dioxolane, 2,2-dimethyl-4-phenyl-1,3-dioxolane, 2,2-diethyl-4-methyl-1,3-dioxolane, 2,2-diethyl-4-vinyl-1,3-dioxolane, 2,2-diethyl-4-phenyl-1,3-dioxolane. An inversion of configuration at the carbon atom at the C-O bond cleavage site of the epoxide was observed to occur in the formation of (R,S)-2,2,4,5-tetramethyl-1,3-dioxolane and a mixture of (R,R)- and (S,S)-2,2,4,5-tetramethyl-1,3-dioxolane from the reactions of acetone with (R,R)-/(S,S)-2-butene oxide and (R,S)-2-butene oxide, resp.

Journal of Organometallic 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, Related Products of dioxole.

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

Moity, Laurianne published the artcileGlycerol acetals and ketals as bio-based solvents: positioning in Hansen and COSMO-RS spaces, volatility and stability towards hydrolysis and autoxidation, COA of Formula: C6H12O2, the publication is Green Chemistry (2015), 17(3), 1779-1792, database is CAplus.

Four recently launched cyclic glycerol acetals or ketals are evaluated as bio-based solvents. Three of them are industrially available and result from the condensation of glycerol with formaldehyde, acetone and iso-Bu Me ketone. The fourth is under development and is prepared by the reaction of glycerol with benzaldehyde under heterogeneous acidic catalysis. Their solvent properties are evaluated through Hansen and COSMO-RS (COnductor-like Screening MOdel for Real Solvents) approaches, in comparison with traditional petrochem. solvents. Dioxolane- and dioxane-type isomers have close solubility parameters; however the nature of the starting aldehyde/ketone significantly impacts the solvency properties. The stability to hydrolysis depends heavily on both the aldehyde/ketone part and on the size of the ring. In acidic medium, acetals are found to be more stable than ketals and glycerol-based ketals are more stable than ethylene glycol-based ketals. In the case of benzaldehyde glycerol acetal, it is shown that the 6-membered ring isomer (dioxane-type) is approx. 8 times more stable than the 5-membered ring counterpart (dioxolane-type) at low pH. Stability towards autoxidation by O₂ is high for formaldehyde and acetone-derived acetals and drops for the other two compounds Glycerol acetals and ketals are promising potential alternatives to some harmful solvents such as glycol ethers and aniline.

Green 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, COA of Formula: C6H12O2.

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

Cirkva, V. published the artcileRadical addition reactions of fluorinated species. Part 8. Regioselectivity of radical additions to perfluoroalkylethylenes and quantum chemical calculations. Highly selective two-step synthesis of 4-(perfluoroalkyl)butane-1,2-diols, Computed Properties of 1193-11-9, the publication is Journal of Fluorine Chemistry (2000), 102(1-2), 159-168, database is CAplus.

R_FCH:CH₂ (R_F = C₄F₉, C₆F₁₃, C₈F₁₇) easily added nucleophilic radicals generated from alkanols, oxolane and 2,2-dimethyl-1,3-dioxolane. The additions were initiated photochem. in the presence of Me₂CO or by Bz₂O₂, and were completely regioselective and almost completely chemoselective with preparative yields ≤90%. The resulting 4-(fluoroalkyl)dioxolanes were deprotected by methanolysis in acid media to afford R_FCH₂CH₂CH(OH)CH₂OH, which were converted to the corresponding bis-methacrylates. 2,2,4-Trimethyl-1,3-dioxolane (I) reacted at 2 centers to give an 84:16 regioisomeric mixture of fluoroalkylated dioxolanes with preferential attack of the adduct-radical to the more sterically hindered tertiary C-H bond in I. The complete regioselectivity of the additions to (perfluoroalkyl)ethenes is discussed in relation to the tail effect of the perfluoroalkylated chain, and energies of intermediate adduct-radicals were calculated using PM3 and ab initio quantum-chem. methods.

Journal of Fluorine 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, Computed Properties of 1193-11-9.

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

Fleming, Bruce published the artcileReductive cleavage of acetals and ketals by borane, Quality Control of 1193-11-9, the publication is Canadian Journal of Chemistry (1974), 52(6), 888-93, database is CAplus.

Borane in THF reduced acetals, e.g., PhCH(OMe)2, and ketals, e.g., PhC(OEt)2Me, to ethers in good yield under mild and convenient conditions. Cyclic acetals and ketals were converted to hydroxy ethers. The mechanism resembled that of reduction with LiAlH4-AlCl3.

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