Day: November 28, 2022

Tanaka, Maya published the artcileGold-Catalyzed Enantioselective Synthesis, Crystal Structure, and Photophysical/Chiroptical Properties of Aza[10]helicenes, Product Details of C38H24F4O4P2, the publication is Chemistry – A European Journal (2016), 22(28), 9537-9541, database is CAplus and MEDLINE.

The enantioselective synthesis of an aza[10]helicene, possessing two pyridone units, has been achieved by the gold-catalyzed intramol. quadruple hydroarylation of a tetrayne. This aza[10]helicene was successfully converted into a fully aromatic aza[10]helicene, possessing two pyridine units. Structure-photophys. and chiroptical properties relationship in a series of azahelicene isomers has also been disclosed.

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 C14H31NO2, Product Details of C38H24F4O4P2.

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

Satoh, Masakazu published the artcileEnantioselective synthesis of fully benzenoid single and double carbohelicenes via gold-catalyzed intramolecular hydroarylation, Computed Properties of 503538-69-0, the publication is Chemistry – A European Journal (2018), 24(21), 5434-5438, database is CAplus and MEDLINE.

The enantioselective synthesis of fully benzenoid single and double carbo[6]helicenes was achieved via the gold-catalyzed intramol. hydroarylation. The single crystal of the racemic double carbo[6]helicene consists of unique layer structures like timbers with halving joints in the woodworking. Furthermore, the double carbo[6]helicenes exhibited relatively large circularly polarized luminescence (CPL) activities among chiral small organic mols.

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, Computed Properties of 503538-69-0.

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

Ji, Yue published the artcileConcise Redox Deracemization of Secondary and Tertiary Amines with a Tetrahydroisoquinoline Core via a Nonenzymatic Process, Category: dioxole, the publication is Journal of the American Chemical Society (2015), 137(33), 10496-10499, database is CAplus and MEDLINE.

A concise deracemization of racemic secondary and tertiary amines with a tetrahydroisoquinoline core has been successfully realized by orchestrating a redox process consisted of N-bromosuccinimide oxidation and iridium-catalyzed asym. hydrogenation. This compatible redox combination enables one-pot, single-operation deracemization to generate chiral 1-substituted 1,2,3,4-tetrahydroisoquinolines with up to 98% ee in 93% yield, offering a simple and scalable synthetic technique for chiral amines directly from racemic starting materials.

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, Category: dioxole.

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

Yao, Zhiwei published the artcileSynthesis and application of novel sulfonic acid-functionalized ionic liquid with benzothiazole cation, Name: 1,4-Dioxaspiro[4.5]decane, the publication is Gongye Cuihua (2013), 21(5), 54-57, database is CAplus.

A novel sulfonic acid-functionalized ionic liquid [(CH₂)₃SO₃HBth][HSO₄] was prepared with benzothiazole as the cation and hydrogen sulfate as the anion, and was used for catalyzing the ketalization of cyclohexanone with glycol. The effects of reaction time, mole ratio of reactants, the dosage of the water carrying agent and the catalyst and the repeated use of the catalyst were investigated. The results showed that 1,4-dioxaspiro[4,5]decane yield of over 97.30% was attained under the optimal reaction condition as follows: cyclohexanone amount 0.01 mol, glycol amount 0.02 mol, catalyst dosage 5% of cyclohexane mol, the amount of water carrying agent cyclohexane 10 mL, and reaction time 3 h. The catalyst possessed good stability, and its activity did not decrease obviously after repeated use for five times.

Gongye Cuihua 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 C19H14O2, Name: 1,4-Dioxaspiro[4.5]decane.

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

Khorshidi, Alireza published the artcileMagnetite nanoparticles catalyzed preparation of isatin ketals under solvent-free conditions promoted by ultrasound irradiation, Application In Synthesis of 177-10-6, the publication is Arabian Journal of Chemistry (2019), 12(8), 2470-2475, database is CAplus.

Fe₃O₄ magnetic nanoparticles (MNPs) were synthesized via chem. precipitation method and used as an efficient and recyclable catalyst in ketalization of isatins I (X = H, 5-Cl, 5-Br, 7-Cl). It was found that a solvent-free process, under irradiation of sonic waves provides good to excellent yields of the desired ketals II (n = 2, 3).

Arabian Journal of Chemistry 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, Application In Synthesis of 177-10-6.

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

Du, Yijun published the artcilePreparation of a novel solid acid catalyst with Lewis and Bronsted acid sites and its application in acetalization, Safety of 1,4-Dioxaspiro[4.5]decane, the publication is Turkish Journal of Chemistry (2014), 38(1), 157-163, database is CAplus.

A novel melamine-formaldehyde resin (MFR) supported solid acid with Lewis and Bronsted acid sites was synthesized through the immobilization of acidic ionic liquid and cuprous ion on MFR. The SEM (SEM) characterization showed that addition of PEG-2000 in the synthesis of MFR could promote the formation of regular particles with diameters around 3.7 μm. The XRD pattern demonstrated that some cuprous ions were aggregated. The catalytic performance of this acid catalyst was evaluated by acetalization. The results showed that the catalytic activity of MFR with Bronsted acid could be improved by addition of Lewis acid. The solid acid was very efficient for the acetalization of carbonyl compounds and diols with moderate to excellent yields and there was no loss of catalytic activity even after being recycled for 6 runs.

Turkish Journal of Chemistry 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

Petryaev, E. P. published the artcileCertain principles of the fragmentation of α-diol radicals, Quality Control of 1193-11-9, the publication is Zhurnal Organicheskoi Khimii (1978), 14(5), 920-3, database is CAplus.

The radical fragmentation paths (γ-irradiation) of MeCH(OH)CH₂OH, MeOCH₂CH₂OMe, and 2,2,4-trimethyl- and 2,2,4,5-tetramethyl-1,3-dioxolanes were discussed, especially in terms of energy levels. The possibility of fragmentation by a synchronous mechanism was considered.

Zhurnal Organicheskoi Khimii 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

Petryaev, E. P. published the artcileMechanism of the fragmentation of radicals of α-diols and some of their derivatives, Product Details of C6H12O2, the publication is Khimiya Vysokikh Energii (1979), 13(1), 19-22, database is CAplus.

γ-Radiolysis of MeOCH₂CH₂OMe gave MeOCH•CH₂OMe, which decomposed to HCOCH₂• and Me₂O. Radiolysis of I (R = H, R¹ = Me; R = R¹ = Me) gave a cyclic radical, which decomposed to RCOCH•R¹ and Me₂CO. Synchronous cleavage of 2 bonds β to the initially formed radical was proposed.

Khimiya Vysokikh Energii 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

MacLeod, Glesni published the artcileSubstituted 4-methyl-1,3-dioxolanes: solvent interaction products in some commercial beef flavorings, Synthetic Route of 1193-11-9, the publication is Journal of Agricultural and Food Chemistry (1980), 28(2), 441-6, database is CAplus.

Using a modified Likens and Nickerson extraction procedure followed by low-temperature/high-vacuum distillation representative samples of aroma volatiles were obtained from some com. beef flavorings. Prefractionation of concentrates by preparative gas chromatog. facilitated subsequent anal. by combined gas chromatog.-mass spectrometry. One fraction provided a number of similar mass spectra with intense characteristic peaks at m/e 87. These could be 2-substituted-4-methyl-1,3-dioxolanes, but dioxolanes have not been reported as volatile components of meat. Selected 1,3-dioxolanes were synthesized and comparison of their mass spectra and gas-chromatog. retention times confirmed the identities of the unknown components of the simulated meat flavor isolate. Their origin may be explained by interaction of 1,2-propanediol [57-55-6], a commonly used solvent for com. flavors, with carbonyl aroma components, interactions which can modify the flavor characteristics of the product.

Journal of Agricultural and Food 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, Synthetic Route of 1193-11-9.

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

Lamaty, Gerard published the artcileAcid hydrolysis of cyclic acetals. Precise determination of the rate constant of hydrolysis, Synthetic Route of 1193-11-9, the publication is Compt. Rend. (1964), 258(19), 4805-8, database is CAplus.

The rate constants were determined for the acid hydrolysis of the 10 cyclic acetals obtained by condensation of (CH₂OH)₂ and MeCH(OH)CH₂OH with the following ketones: Me₂CO, MeEtCO, Et₂CO, cyclohexanone, and cyclopentanone. Measurements made by direct dilatometry and calculated with a computer were extremely precise, but the results indicated that the reaction had only limited interest from the point of view of conformational analysis.

Compt. Rend. 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