Tag: M.W=200-250

Liebing, Phil published the artcileSupramolecular Aggregation of Perfluoroorganyl Iodane Reagents in the Solid State and in Solution, HPLC of Formula: 1206-46-8, the publication is European Journal of Organic Chemistry (2018), 2018(27-28), 3771-3781, database is CAplus.

The crystal structures of different perfluoroorganyl iodanes are described, including those of four new benziodoxole derivatives with R_F = n-C₃F₇, n-C₄F₉, n-C₈F₁₇, and C₆F₅. In all of the compounds, the iodine atom shows significant Lewis acidity, and the fourth coordination site is readily filled by secondary bonding interactions to produce square-planar coordination. Although this geometry is a good model for benziodoxoles, benziodoxolone derivatives tend to aggregate further through addnl. weak I¡¤¡¤¡¤O or I¡¤¡¤¡¤aryl contacts. The different interactions lead to the formation of various assemblies with different dimensions in the solid state. The protonation of the reagents results in the formation of entirely different supramol. structures, which are supported by hydrogen bonding. The structural features of the reagents in the solid state reflect well their behavior in solution, and the I-C(R_F) bond is influenced by the coordination of Lewis basic solvents to the iodine atom and by hydrogen bonding with protic solvents. These solvent effects are more pronounced for reagents containing the trifluoromethyl fragment than for derivatives with longer R_F chains.

European Journal of Organic Chemistry published new progress about 1206-46-8. 1206-46-8 belongs to catalysis-chemistry, auxiliary class Organic Silicones, name is Trimethyl(perfluorophenyl)silane, and the molecular formula is C9H9F5Si, HPLC of Formula: 1206-46-8.

Referemce:
https://courses.lumenlearning.com/boundless-chemistry/chapter/catalysis/,
Catalysis – Wikipedia

Paczkowski, Jerzy published the artcileGeneralization of the Kinetic Scheme for Photoinduced Polymerization via an Intermolecular Electron Transfer Process. 2. Application of the Marcus Theory, Formula: C14H23N, the publication is Macromolecules (1996), 29(15), 5057-5064, database is CAplus.

A theor. description of the kinetics of free-radical dye-initiated photopolymerization via an intermol. electron transfer process is given. Anal. considers the properties of organic redox pair forming initiating radicals. An application of the Marcus theory gives the kinetic scheme, which considers both the thermodn. and kinetic aspects of the electron transfer process. The anal. shows that both the reactivity of free radicals resulting from the photoinduced intermol. electron transfer (PET) process and the rate of the PET process can limit the rate of the polymerization initiation process. The theory is supported by exptl. data. Several organic redox pairs forming free radicals were tested. As the electron-accepting mols., xanthene dyes and camphorquinone were tested. As the electron donors, tertiary aromatic amines (TAAs) and N-phenylglycines (NPGs) were used. Several important conclusions are drawn from the theor. and exptl. data. For the process with the rate of PET much lower than the rate of the diffusion-controlled process, the Marcus theory can be used for analyzing or predicting the ability of organic redox systems for light-induced free radical polymerization For the process controlled by the diffusion, the reactivity of radicals formed as a result of the PET process limits the rate of the polymerization initiation. This relationship can also be presented as a function of thermodn. driving forces of the photoredox reaction (-¦¤G¡ã). The rate of photoinitiated polymerization can be described as a function of thermodn. driving forces of the photoredox reaction (-¦¤G¡ã; described by the Rehm-Weller equation) of the organic donor-acceptor pair. For the photoinduced electron transfer occurring much slower than diffusion-controlled processes, the relationship between the rate of polymerization and -¦¤G¡ã presents a classical Marcus parabolic relationship. For PET controlled by diffusion, the relationship between the rate of polymerization and -¦¤G¡ã is dependent on the reactivity of free radicals resulting from the PET process and gives a linear relationship indicating the inverted region-like kinetic behavior.

Macromolecules published new progress about 2909-77-5. 2909-77-5 belongs to catalysis-chemistry, auxiliary class Amine,Benzene, name is 2,6-Diisopropyl-N,N-dimethylaniline, and the molecular formula is C14H23N, Formula: C14H23N.

Referemce:
https://courses.lumenlearning.com/boundless-chemistry/chapter/catalysis/,
Catalysis – Wikipedia

Kelly, Donovan P. published the artcilePhotochemical rearrangement of aromatic ethers, COA of Formula: C12H16O3, the publication is Australian Journal of Chemistry (1969), 22(5), 977-91, database is CAplus.

The irradiation of various types of aromatic ethers with uv light yields o- and p-substituted phenols, resulting from C-O bond fission followed by recombination of the 2 fragments. Also formed in these photolyses was the parent phenol, produced presumably by abstraction of H from the solvent by the aryloxy fragment. The ethers investigated were aryloxyacetic acids, allyl aryl ethers, benzyl phenyl ether, and diphenyl ether. Mixture experiments have shown that for both the aryloxyacetic acids and allyl aryl ethers the rearrangement is intramol. and most probably proceeds by formation of a radical-pair enclosed in a solvent cage.

Australian Journal of Chemistry published new progress about 1798-04-5. 1798-04-5 belongs to catalysis-chemistry, auxiliary class Carboxylic acid,Benzene,Ether, name is 2-(4-(tert-Butyl)phenoxy)acetic acid, and the molecular formula is C12H16O3, COA of Formula: C12H16O3.

Referemce:
https://courses.lumenlearning.com/boundless-chemistry/chapter/catalysis/,
Catalysis – Wikipedia

Yao, Min-Liang published the artcileDeoxygenation of benzylic alcohols using chloroboranes, Product Details of C13H10F2, the publication is Tetrahedron Letters (2010), 51(5), 853-855, database is CAplus.

Boron-based methods for the preparation of diarylmethanes by deoxygenation of benzylic alcs. via the corresponding alkoxides are reported. The deoxygenation reaction proceeds efficiently at room temperature to give products in moderate to high yields.

Tetrahedron Letters published new progress about 457-68-1. 457-68-1 belongs to catalysis-chemistry, auxiliary class Fluoride,Benzene, name is Bis(4-fluorophenyl)methane, and the molecular formula is C27H39ClN2, Product Details of C13H10F2.

Referemce:
https://courses.lumenlearning.com/boundless-chemistry/chapter/catalysis/,
Catalysis – Wikipedia

Xie, Xin published the artcileAsymmetric Synthesis of Oxa-spirocyclic Indanones with Structural Complexity via an Organocatalytic Michael-Henry-Acetalization Cascade, Formula: C10H11NO4, the publication is Synlett (2014), 25(1), 143-147, database is CAplus.

The highly enantioselective preparation of drug-like oxa-spirocyclic indanone derivatives employing a multicomponent cascade reaction of aldehydes, nitro alkenes, and ninhydrin is described. This approach utilizes an organocatalytic Michael reaction followed by a Henry-acetalization sequence that yields the desired chiral spirocyclic backbone, bearing four contiguous stereogenic centers and multiple functional groups, in good yields and high stereoselectivities (up to 99% ee and 95:5 dr).

Synlett published new progress about 4230-93-7. 4230-93-7 belongs to catalysis-chemistry, auxiliary class Alkenyl,Nitro Compound,Benzene,Ether, name is 1,2-Dimethoxy-4-(2-nitrovinyl)benzene, and the molecular formula is C12H16O3, Formula: C10H11NO4.

Referemce:
https://courses.lumenlearning.com/boundless-chemistry/chapter/catalysis/,
Catalysis – Wikipedia

Xie, Xin published the artcileAsymmetric synthesis of a structurally and stereochemically complex spirooxindole pyran scaffold through an organocatalytic multicomponent cascade reaction, SDS of cas: 4230-93-7, the publication is Chemical Communications (Cambridge, United Kingdom) (2012), 48(85), 10487-10489, database is CAplus and MEDLINE.

A novel and convenient organocatalytic tandem reaction has been developed for the asym. assembly of saturated aldehydes (or enals), nitroolefins and isatins to produce six-membered oxa-spirooxindole backbones bearing four contiguous stereogenic centers and multiple functional groups with high stereoselectivity, e.g. I.

Chemical Communications (Cambridge, United Kingdom) published new progress about 4230-93-7. 4230-93-7 belongs to catalysis-chemistry, auxiliary class Alkenyl,Nitro Compound,Benzene,Ether, name is 1,2-Dimethoxy-4-(2-nitrovinyl)benzene, and the molecular formula is C6H5BN2O3, SDS of cas: 4230-93-7.

Referemce:
https://courses.lumenlearning.com/boundless-chemistry/chapter/catalysis/,
Catalysis – Wikipedia

Sun, Yushan published the artcileChemistry of ocean resources. XI. Effect of some organic molecules on the chemical behavior of potassium ion in low-concentration solution and seawater and corresponding potassium trapping mechanism, Quality Control of 5411-14-3, the publication is Haiyang Xuebao (Zhongwenban) (1987), 9(1), 127-31, database is CAplus.

The enrichment of K⁺ from low-concentration solutions and seawater was studied with (2RS,3RS)-(¡À)-tartaric acid (I), (2R,2S)-(¡À)-malic acid, succinic acid, maleic acid, adipic acid, glucaric acid, citric acid, galactaric acid, O,O‘-ortho-dihydroxybenzenediacetic acid (II), O,O‘-meta-dihydroxybenzenediacetic acid, O,O‘-para-dihydroxybenzenediacetic acid, 1,1’-dihydroxybiphenyl-O,O‘-diacetic acid, and 1,1’-dihydroxybinaphthalene-O,O‘-diacetic acid (III). I, II, and III gave high enrichment efficiency by complexation.

Haiyang Xuebao (Zhongwenban) published new progress about 5411-14-3. 5411-14-3 belongs to catalysis-chemistry, auxiliary class Carboxylic acid,Benzene,Ether, name is 2,2-(1,2-Phenylenebis(oxy))diacetic acid, and the molecular formula is C20H40O2, Quality Control of 5411-14-3.

Referemce:
https://courses.lumenlearning.com/boundless-chemistry/chapter/catalysis/,
Catalysis – Wikipedia

Sun, Yushan published the artcileChemistry of ocean resources. IX. A new type of organic enrichment agent for extraction of potassium from seawater, Synthetic Route of 5411-14-3, the publication is Haiyang Xuebao (Zhongwenban) (1987), 9(3), 330-4, database is CAplus.

The enrichment of K⁺ ion from seawater and low-concentration solutions was studied by using O,O‘-catecholdiacetic acid (CDAH₂) as complex donor. The K⁺ ion enrichment efficiency was ¡Ý90%. Solid CDAHK.CDAH₂ was formed in the precipitation conversion.

Haiyang Xuebao (Zhongwenban) published new progress about 5411-14-3. 5411-14-3 belongs to catalysis-chemistry, auxiliary class Carboxylic acid,Benzene,Ether, name is 2,2-(1,2-Phenylenebis(oxy))diacetic acid, and the molecular formula is C22H32O2, Synthetic Route of 5411-14-3.

Referemce:
https://courses.lumenlearning.com/boundless-chemistry/chapter/catalysis/,
Catalysis – Wikipedia

Hornillos, Valentin published the artcileCu-Catalyzed Asymmetric Allylic Alkylation of Phosphonates and Phosphine Oxides with Grignard Reagents, Computed Properties of 4141-48-4, the publication is Chemistry – A European Journal (2013), 19(17), 5432-5441, database is CAplus and MEDLINE.

An efficient and highly enantioselective Cu-catalyzed allylic alkylation of phosphonates and phosphine oxides with Grignard reagents and Taniaphos or phosphoramidites as chiral ligands is reported. Transformation of these products leads to a variety of new P-containing chiral intermediates.

Chemistry – A European Journal published new progress about 4141-48-4. 4141-48-4 belongs to catalysis-chemistry, auxiliary class Aryl phosphine ligand,Mono-phosphine Ligands, name is Allyldiphenylphosphine oxide, and the molecular formula is C15H15OP, Computed Properties of 4141-48-4.

Referemce:
https://courses.lumenlearning.com/boundless-chemistry/chapter/catalysis/,
Catalysis – Wikipedia

Yun Soo Choi published the artcileStereoselective substitution of configurationally labile ¦Á-bromo aryl-acetates with amines and azlactones by L-threonine-mediated crystallization-induced dynamic resolution, SDS of cas: 140-28-3, the publication is European Journal of Organic Chemistry (2016), 2016(14), 2539-2546, database is CAplus.

We developed a highly stereoselective C-N and C-C bond-forming reaction by carrying out a crystallization-induced dynamic resolution (CIDR) of ¦Á-bromo arylacetates followed by a stereoselective substitution reaction with an amine or azlactone nucleophile. Applications of this synthetic method to the preparation of highly enantioenriched nitrogen-containing six-membered heterocycles and ¦Á,¦Â-disubstituted aspartates are also presented.

European Journal of Organic Chemistry published new progress about 140-28-3. 140-28-3 belongs to catalysis-chemistry, auxiliary class Benzenes, name is N1,N2-Dibenzylethane-1,2-diamine, and the molecular formula is C4H11NO, SDS of cas: 140-28-3.

Referemce:
https://courses.lumenlearning.com/boundless-chemistry/chapter/catalysis/,
Catalysis – Wikipedia