Day: November 21, 2022

Mita, Tsuyoshi published the artcileCo-Catalyzed Direct Addition of Allylic C(sp³)-H Bonds to Ketones, Computed Properties of 503538-69-0, the publication is Organic Letters (2017), 19(21), 5876-5879, database is CAplus and MEDLINE.

By using Co(acac)₂/Xantphos with AlMe₃, the C(sp³)-H bonds of allylarene derivatives were cleaved for reaction with various ketones, affording the homoallylic alcs. in moderate to good yields. The branch/linear selectivity depended on the steric and electronic factors of the ketone electrophiles. The intermediate in this reaction is thought to be a low-valent allylcobalt(I) species, which exhibits high nucleophilicity toward ketones.

Organic Letters published new progress about 503538-69-0. 503538-69-0 belongs to dioxole, auxiliary class (Atropisomeric Bisphosphine Ligands, name is (R)-5,5′-Bis(diphenylphosphino)-2,2,2′,2′-tetrafluoro-4,4′-bi-1,3-benzodioxole, and the molecular formula is C38H24F4O4P2, Computed Properties of 503538-69-0.

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

Xu, Xiaofeng published the artcile2,7-Carbazole-1,4-phenylene Copolymers with Polar Side Chains for Cathode Modifications in Polymer Light-Emitting Diodes, Safety of 9-(6-Bromohexyl)-2,7-bis(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)-9H-carbazole, the publication is Macromolecules (Washington, DC, United States) (2011), 44(11), 4204-4212, database is CAplus.

Alc.-soluble 2,7-carbazole-1,4-phenylene copolymers PCP-NOH and PCP-EP, comprising surfactant-like diethanolamino and phosphonate end groups on the side chains, resp., were synthesized and utilized as electron injection layer (EIL) in combination with high work function Al electrode in polymer light-emitting diodes (PLEDs). The UV-vis absorption and photoluminescence properties of the PCP-NOH and PCP-EP are mainly determined by the conjugated 2,7-carbazole-1,4-phenylene main chain. The PCP-NOH and PCP-EP possess comparable HOMO levels of -5.20 eV and LUMO levels around -2.35 eV. Multilayer PLEDs with a device configuration of ITO/PEDOT:PSS (40 nm)/emissive layer (70 nm)/EIL (15 nm)/Al (100 nm) were successfully fabricated. With fluorescent PFO-DBT15 as the emissive layer, the PLEDs using the PCP-NOH and PCP-EP as the EIL displayed luminous efficiency (LE) of 1.01 and 0.88 cd/A, resp., all obviously higher than 0.015 cd/A for sole Al cathode and 0.58 cd/A for the well-known Ba/Al cathode. With a phosphorescent Ir(mppy)₃-doped polymer blend (PVK:PBD:Ir(mppy)₃ = 100:30:1) as the emissive layer, the PLEDs with the EIL showed high maximum LE of 39.3 cd/A for PCP-NOH and 42.5 cd/A for PCP-EP, in comparison to 0.35 cd/A for sole Al cathode and 32.2 cd/A for the Ba/Al cathode. Particularly, the PLED with PCP-EP as EIL exhibited an excellent LE of 33.3 cd/A at a c.d. of 61.1 mA/cm² (luminance = 20 300 cd/cm²), showing weak roll-off of efficiency at high c.d. Inserting the polar alc.-soluble polymers as interlayer can significantly increase built-in potentials in the PLEDs, from which electron injection barrier from the Al electrode is decreased. The results indicate that the PCP-NOH and PCP-EP are excellent electron injection polymers for high-performance PLEDs with high work function Al electrode.

Macromolecules (Washington, DC, United States) published new progress about 1268162-40-8. 1268162-40-8 belongs to dioxole, auxiliary class Boronic acid and ester,Boronic acid and ester,Bromide, name is 9-(6-Bromohexyl)-2,7-bis(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)-9H-carbazole, and the molecular formula is C14H22BNO4S, Safety of 9-(6-Bromohexyl)-2,7-bis(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)-9H-carbazole.

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

Lin, Sen published the artcileCatalytic activities of dialkyltin compounds containing silicon to the condensation reaction of acetal (ketal)-alcohol, Quality Control of 177-10-6, the publication is Yingyong Huaxue (2013), 30(3), 271-275, database is CAplus.

The catalytic activities of ten dialkyltin compounds containing silicon were investigated through the condensation reaction of acetal (ketal)-alc. Factors such as amount of catalyst, reaction time, molar ratio of aldehyde (ketone) to alc. and solvent kind were studied toward the yield of reaction. The results show that, except one catalyst, nine compounds are good in catalytic activities for the acetalization and ketalization. The yield reached 92% and 86% under optimal compounds: catalyst dosage was 1.4% based on the mass of the reactants, the molar ratio of the aldehyde to glycol was 1:1.3, ketone to glycol was 1:1.9, cyclohexane was used as the water carrying agent, and the reaction was refluxed for 3 h.

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

Nguyen, Qui-Hien published the artcileIntermolecular Palladium(0)-Catalyzed Atropo-enantioselective C-H Arylation of Heteroarenes, Name: (R)-5,5′-Bis(diphenylphosphino)-2,2,2′,2′-tetrafluoro-4,4′-bi-1,3-benzodioxole, the publication is Journal of the American Chemical Society (2020), 142(5), 2161-2167, database is CAplus and MEDLINE.

Atropisomeric (hetero)biaryls are motifs with increasing significance in ligands, natural products, and biol. active mols. The straightforward construction of the stereogenic axis by efficient C-H functionalization methods is extremely rare and challenging. An intermol. and highly enantioselective C-H arylation of relevant heteroarenes providing an efficient access to atropisomeric (hetero)biaryls is reported. The use of a Pd(0) complex equipped with H₈-BINAPO as a chiral ligand enables the direct functionalization of a broad range of 1,2,3-triazoles and pyrazoles in excellent yields and selectivities of up to 97.5:2.5 er. The method also allows for an atroposelective double C-H arylation for the construction of two stereogenic axes with >99.5:0.5 er.

Journal of the American Chemical Society published new progress about 503538-69-0. 503538-69-0 belongs to dioxole, auxiliary class (Atropisomeric Bisphosphine Ligands, name is (R)-5,5′-Bis(diphenylphosphino)-2,2,2′,2′-tetrafluoro-4,4′-bi-1,3-benzodioxole, and the molecular formula is C38H24F4O4P2, Name: (R)-5,5′-Bis(diphenylphosphino)-2,2,2′,2′-tetrafluoro-4,4′-bi-1,3-benzodioxole.

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

Liu, Wenzhu published the artcileSulfuric Acid Immobilized on Activated Carbon Aminated with Ethylenediamine: An Efficient Reusable Catalyst for the Synthesis of Acetals (Ketals), Product Details of C8H14O2, the publication is Nanomaterials (2022), 12(9), 1462, database is CAplus and MEDLINE.

Through the amination of oxidized activated carbon with ethylenediamine and then the adsorption of sulfuric acid, a strong carbon-based solid acid catalyst with hydrogen sulfate (denoted as AC-N-SO₄H) was prepared, of which the surface acid d. was 0.85 mmol/g. The acetalization of benzaldehyde with ethylene glycol catalyzed by AC-N-SO₄H was investigated. The optimized catalyst dosage accounted for 5 weight% of the benzaldehyde mass, and the molar ratio of glycol to benzaldehyde was 1.75. After reacting such mixture at 80 °C for 5 h, the benzaldehyde was almost quant. converted into acetal; the conversion yield was up to 99.4%, and no byproduct was detected. It is surprising that the catalyst could be easily recovered and reused ten times without significant deactivation, with the conversion yield remaining above 99%. The catalyst also exhibited good substrate suitability for the acetalization of aliphatic aldehydes and the ketalization of ketones with different 1,2-diols.

Nanomaterials 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

Cai, Xian-Feng published the artcileSynthesis of chiral exocyclic amines by asymmetric hydrogenation of aromatic quinolin-3-amines, Application of (R)-5,5′-Bis(diphenylphosphino)-2,2,2′,2′-tetrafluoro-4,4′-bi-1,3-benzodioxole, the publication is Chemistry – A European Journal (2014), 20(24), 7245-7248, database is CAplus and MEDLINE.

Asym. hydrogenation of aromatic quinolin-3-amines was successfully developed with up to 94 % enantiomeric excess (ee). Introduction of the phthaloyl moiety to the amino group is crucial to eliminate the inhibition effect caused by the substrate and product, to activate the aromatic ring, and to improve the diastereoselectivity. This new methodol. provides direct and facile access to chiral exocyclic amines. Notably, this report is the first on the highly enantioselective hydrogenation of aromatic amines. The structures and absolute configuration of the compounds were confirmed by the single crystal x-ray diffraction anal. of 4-methyl-N-((2S,3S)-2-phenyl-1,2,3,4-tetrahydroquinolin-3-yl)benzenesulfonamide and its crystallog. data were deposited at the Cambridge Crystallog. Data Center as supplementary publication number CCDC 962689.

Chemistry – A European Journal published new progress about 503538-69-0. 503538-69-0 belongs to dioxole, auxiliary class (Atropisomeric Bisphosphine Ligands, name is (R)-5,5′-Bis(diphenylphosphino)-2,2,2′,2′-tetrafluoro-4,4′-bi-1,3-benzodioxole, and the molecular formula is C38H24F4O4P2, Application of (R)-5,5′-Bis(diphenylphosphino)-2,2,2′,2′-tetrafluoro-4,4′-bi-1,3-benzodioxole.

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

Chen, Xiaomei published the artcileSynthesis of acetals and ketals catalyzed by task-specific acidic ionic liquid, Formula: C6H12O2, the publication is Yingyong Huagong (2006), 35(2), 96-98, database is CAplus.

In the absence of any organic solvents, the acetalization of aldehydes or ketones with diols was investigated, which catalyzed by task-specific acidic ionic liquid (IL) under mild conditions. The influences of other conditions including the amount of catalyst, reaction time and temperature on yield of products were also discussed. Results showed the optimal reaction conditions were 353 K, the mole ratio of aldehydes or ketones to IL was 5:1, and the yield of acetals achieved 93.8%. It was unnecessary to remove water produced during the reaction process; the catalyst can be reused for five times without any apparent loss of catalytic activity.

Yingyong Huagong 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, Formula: C6H12O2.

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

Li, Gui-xian published the artcileStudy on the catalytic synthesis of 1,3-dioxolane over Wells-Dawson-type molybdovanadophosphoric heteropolyacid, Synthetic Route of 1193-11-9, the publication is Fenzi Cuihua (2004), 18(5), 321-325, database is CAplus.

The effects of heteropolyacid catalysts and various structural substrates on the catalytic activity to synthesis 1,3-dioxolane derivatives were investigated. The results indicated that Wells-Dawson Heteropolyacid H₇P₂Mo₁₇VO₆₂ is the best catalyst for this reaction with nearly complete conversion of epoxide and excess 90% of selectivity to 1,3-dioxolane.

Fenzi Cuihua 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, Synthetic Route of 1193-11-9.

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

Giogios, Ioannis published the artcileFatty acid composition and volatile compounds of selected marine oils and meals, Application of 2,2,4-Trimethyl-1,3-dioxolane, the publication is Journal of the Science of Food and Agriculture (2009), 89(1), 88-100, database is CAplus.

Background: Although volatile compounds characterizing seafood have been studied extensively, no similar data are available regarding the volatiles of raw materials used in fish feed. Therefore the aim of this study was to make an initial screening of the volatiles of various common marine raw materials used in the aquaculture feed industry. Nine com. marine oils (German (GFO1, GFO2 GFO3) and Norwegian (NFO) fish oils and salmon (SO1 and SO2), tuna (TO), sardine (SRDO) and shrimp (SHO) oils) and eight com. marine meals (Peruvian (PFM1 and PFM2), Danish (DFM1 and DFM2) and prime quality (PQFM1 and PQFM2) fish meals and Antarctic krill meals (KM1 and KM2)) were analyzed for their fatty acid profiles and volatile flavor compounds The relation between fatty acids and volatiles was examined Results: The highest polyunsaturated fatty acid and eicosapentaenoic acid (20: 5ω3) contents and ω3/ω6 ratio were found in NFO. The fatty acid composition of all marine meals except krill meals was found to be more variable among batches than that of marine oils. Regarding volatiles, all marine raw materials were characterized by the complete absence or negligible levels of 8- and 9-carbon alcs. and carbonyls. All marine oils were found to have high 2-Et furan, 2-methylenebutyl cyclopropane, hexanal, 2,4-octadiene and 3,5-octadiene contents. Marine meals, unlike marine oils, were characterized by the almost complete absence of unsaturated and cyclic hydrocarbons and terpenes and very low levels of furans. Conclusion: Volatiles of marine meals differ from those of marine oils. Unlike fatty acids which give useful traceability information, volatiles seem to fail in this role owing to their strong variability.

Journal of the Science of Food and Agriculture 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, Application of 2,2,4-Trimethyl-1,3-dioxolane.

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

Bogatskii, A. V. published the artcileCharges on heteroatoms and relative basicity of 1,3-dioxolane molecules, Product Details of C6H12O2, the publication is Ukrainskii Khimicheskii Zhurnal (Russian Edition) (1979), 45(1), 38-41, database is CAplus.

A linear relation was found between the at. charge on the O atoms of I (R = H, Me, Me₂CH; R¹, R² = H, Me) and the basicity of I, as determined by IR frequency shifts of the OH group of PhOH. A linear relation between basicity and Taft σ^* constants was also obtained.

Ukrainskii Khimicheskii Zhurnal (Russian Edition) 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, Product Details of C6H12O2.

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