Month: December 2022

Das, Anish Kumar published the artcileDefects Engineering on Ceria and C-C Coupling Reactions Using [Au₁₁(PPh₃)₇I₃] Nanocluster: A Combined Experimental and Theoretical Study, Recommanded Product: 4,4′-Dimethyldiphenyl, the publication is ACS Nano (2020), 14(12), 16681-16688, database is CAplus and MEDLINE.

The synthesis of Au₁₁(PPh₃)₇I₃ cluster that consists of an incomplete icosahedron core is reported. During its impregnation process on CeO₂ support, all of the ligands were removed from the kernel and the Au₁₁ kernel fits into the defects of ceria (embedded onto the O vacancy of ceria (111) plane). This Au₁₁@CeO₂ has high atom efficiency and catalytic activity for Ullmann-type C-C homocoupling reactions for electron rich substrates. D. functional theory calculations showed that hexagonal arrangements of Au₁₁ kernel on (111) plane of CeO₂ is the most stable one. Theor. calculations also proved that the atop Au atom has more favorable interaction with Ph iodide than the 2nd layer Au atoms of the Au₁₁@CeO₂. The present catalyst mimics the single-atom catalyst-like behavior in facilitating the coupling reactions.

ACS Nano published new progress about 613-33-2. 613-33-2 belongs to catalysis-chemistry, auxiliary class Benzene, name is 4,4′-Dimethyldiphenyl, and the molecular formula is C14H14, Recommanded Product: 4,4′-Dimethyldiphenyl.

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

Kelemen, Rachel E. published the artcileA Precise Chemical Strategy To Alter the Receptor Specificity of the Adeno-Associated Virus, Computed Properties of 1395786-30-7, the publication is Angewandte Chemie, International Edition (2016), 55(36), 10645-10649, database is CAplus and MEDLINE.

The ability to target the adeno-associated virus (AAV) to specific types of cells, by altering the cell-surface receptor it binds, is desirable to generate safe and efficient therapeutic vectors. Chem. attachment of receptor-targeting agents onto the AAV capsid holds potential to alter its tropism, but is limited by the lack of site specificity of available conjugation strategies. The development of an AAV production platform is reported that enables incorporation of unnatural amino acids (UAAs) into specific sites on the virus capsid. Incorporation of an azido-UAA enabled site-specific attachment of a cyclic-RGD peptide onto the capsid, retargeting the virus to the ¦Á_v¦Â₃ integrin receptors, which are overexpressed in tumor vasculature. Retargeting ability was site-dependent, underscoring the importance of achieving site-selective capsid modification. This work provides a general chem. approach to introduce various receptor binding agents onto the AAV capsid with site selectivity to generate optimized vectors with engineered infectivity.

Angewandte Chemie, International Edition published new progress about 1395786-30-7. 1395786-30-7 belongs to catalysis-chemistry, auxiliary class Inhibitor, name is Dbco-maleimide, and the molecular formula is C25H21N3O4, Computed Properties of 1395786-30-7.

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

Reddy, Golipalli Ramana published the artcileUnusual Reactivity of Nitronates with an Aryl Alkyl Carbonate: Synthesis of ¦Á-Amino Esters, HPLC of Formula: 4230-93-7, the publication is Organic Letters (2014), 16(22), 5874-5877, database is CAplus and MEDLINE.

The monoanions of nitroalkanes are ambident nucleophiles that react with carbonate electrophiles through the oxygen atom. Products arising from reactivity at the carbon atom will yield ¦Á-nitro esters, which are precursors for ¦Á-amino esters. We demonstrate this in the reactions of nitroalkanes with benzyl Ph carbonate and DABCO where ¦Á-nitro esters are obtained instead of nitrile oxides. The products are readily reduced to ¦Á-amino esters. This pathway could be a safe alternative to the Strecker reaction.

Organic Letters 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 C10H11NO4, HPLC of Formula: 4230-93-7.

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

Kitagawa, Hideo published the artcileSulfenamide catalyzed oxidation of alcohols to the corresponding carbonyl compounds with anhydrous chloramine-T, Computed Properties of 19117-31-8, the publication is Chemical & Pharmaceutical Bulletin (2002), 50(9), 1276-1279, database is CAplus and MEDLINE.

N-tert-Butylbenzenesulfenamide catalyzed oxidation of various alcs. with stoichiometric amount of anhydrous chloramines-T proceeded smoothly at room temperature to afford the corresponding carbonyl compounds in good yields.

Chemical & Pharmaceutical Bulletin published new progress about 19117-31-8. 19117-31-8 belongs to catalysis-chemistry, auxiliary class Oxidant, name is N-(tert-Butyl)-S-phenylthiohydroxylamine, and the molecular formula is C10H15NS, Computed Properties of 19117-31-8.

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

Chrysanthopoulos, Panagiotis K. published the artcileIdentification of a New Zinc Binding Chemotype by Fragment Screening, Recommanded Product: 2-(3-(Benzyloxy)phenyl)acetic acid, the publication is Journal of Medicinal Chemistry (2017), 60(17), 7333-7349, database is CAplus and MEDLINE.

The discovery of a new zinc binding chemotype from screening a nonbiased fragment library is reported. Using the orthogonal fragment screening methods of native state mass spectrometry and surface plasmon resonance a 3-unsubstituted 2,4-oxazolidinedione fragment was found to have low micromolar binding affinity to the zinc metalloenzyme carbonic anhydrase II (CA II). This affinity approached that of fragment sized primary benzenesulfonamides, the classical zinc binding group found in most CA II inhibitors. Protein X-ray crystallog. established that 3-unsubstituted 2,4-oxazolidinediones bound to CA II via an interaction of the acidic ring nitrogen with the CA II active site zinc, as well as two hydrogen bonds between the oxazolidinedione ring oxygen and the CA II protein backbone. Furthermore, 3-unsubstituted 2,4-oxazolidinediones appear to be a viable starting point for the development of an alternative class of CA inhibitor, wherein the medicinal chem. pedigree of primary sulfonamides has dominated for several decades.

Journal of Medicinal Chemistry published new progress about 1860-58-8. 1860-58-8 belongs to catalysis-chemistry, auxiliary class Carboxylic acid,Benzene,Ether, name is 2-(3-(Benzyloxy)phenyl)acetic acid, and the molecular formula is C15H14O3, Recommanded Product: 2-(3-(Benzyloxy)phenyl)acetic acid.

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

Klanberg, Frank published the artcileNuclear magnetic resonance studies on pentacoordinate silicon fluorides, Product Details of C12H10F2Si, the publication is Inorganic Chemistry (1968), 7(1), 155-60, database is CAplus.

The 19F and 1H N.M.R. spectra of fluorosilicate anions SiF5, RSiF4- (R’ = alkyl, aryl), and (C6H5)2SiF3- have been examined as a function of temperature and solvent polarity. The spectra are consistent with the thesis that these anions exist as pentacoordinate entities in solvents of low polarity. The low-temperature spectra of SiF5- and RSiF4- show spectroscopic equivalence of all F atoms in these species, probably the result of rapid intramol. rearrangements. The spectrum of (C6H5)2SiF3- establishes two different F atom environments at low temperature which are ascribed to axial and equatorial positions in a trigonal-bipyramidal (C2)v configuration for the anion. Above -40¡ã, these two environments are averaged out into a single resonance. Spin coupling between Si and F nuclei (29Si-19F), as well as between F and H nuclei (19F-Si-C-H1), vanishes upon addition of excess fluoride ion or in protonic solvents such as water and alc. This in conjunction with the dramatic broadening of the 19F resonances observed under these conditions is rationalized in terms of rapid intermol. exchange RSiF4- + F*- ? RSiF3F*- + F-. 21 references.

Inorganic Chemistry published new progress about 312-40-3. 312-40-3 belongs to catalysis-chemistry, auxiliary class Organic Silicones, name is Difluorodiphenylsilane, and the molecular formula is C12H10F2Si, Product Details of C12H10F2Si.

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

Wolfgramm, Regine published the artcileIrreversible Rearrangement of Silyl Groups between Oxygen and Nitrogen in Tris(silyl)hydroxylamines, Application of Difluorodiphenylsilane, the publication is Organometallics (1998), 17(15), 3222-3226, database is CAplus.

Diorganofluorosilylation of 1,2-bis(trimethylsilyl)hydroxylamines at low temperatures gives exclusively O-(diorganofluorosilyl)-N,N-bis(trimethylsilyl)hydroxylamines 1. The thermal rearrangement of 1 to the isomeric N-(diorganofluorosilyl)-N,O-bis(trimethylsilyl)hydroxylamines 2 is irreversible, and the exptl. data suggest an intramol. course of the isomerization. Ab initio and d. functional calculations for model compounds demonstrate the dyotropic course of the rearrangement. Anomeric stabilization of 2 by more favorable neg. F-Si-N and O-Si-C hyperconjugation is important for the irreversibility of the reaction.

Organometallics published new progress about 312-40-3. 312-40-3 belongs to catalysis-chemistry, auxiliary class Organic Silicones, name is Difluorodiphenylsilane, and the molecular formula is C14H12O3, Application of Difluorodiphenylsilane.

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

Rachor, Simon G. published the artcileSynthesis, Reactivity, and Bonding of Gold(I) Fluorido-Phosphine Complexes, Related Products of catalysis-chemistry, the publication is Inorganic Chemistry (2022), 61(1), 357-367, database is CAplus and MEDLINE.

Au(I) fluorido complexes with phosphine ligands were synthesized from their resp. iodo precursors. The bonding situation in comparison between complexes bearing phosphines and N-heterocyclic carbenes (NHCs) was explored quantum-chem., obtaining similar results for both. Calculations of the ¹⁹F NMR chem. shifts match the exptl. values well, including the ?40 ppm low-field shifts for the phosphine complexes compared to the NHC complexes, in spite of similar neg. charges on F. The reactivity of the highly H₂O-sensitive Au(I) fluorido complexes was studied, resulting in substitution at the metal using trimethylsilyl reagents. The compounds studied were characterized using NMR as well as x-ray diffraction methods.

Inorganic 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, Related Products of catalysis-chemistry.

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

Dewanji, Abhishek published the artcileC-F Activation in Perfluorinated Arenes with Isonitriles under UV-Light Irradiation, Category: catalysis-chemistry, the publication is Chemistry – A European Journal (2015), 21(35), 12295-12298, database is CAplus and MEDLINE.

The aryl and alkyl isonitriles efficiently activated the strong C-F bond in perfluoroarenes by simple UV irradiation under mild conditions. Reactions proceeded by formal direct insertion of the isonitrile into the C-F bond without any transition metal. Activation occurs at arene C-F bonds whereas aliphatic C-F bonds remain unreacted. For selected perfluoroarenes C-F activation occurred with high regioselectivity and resulting imidoyl fluorides were transformed into other valuable compounds Theor. studies gave insights into the reaction mechanism.

Chemistry – A European Journal 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, Category: catalysis-chemistry.

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

Alexander, Elliot R. published the artcileMechanism of Chugaev and acetate thermal decompositions. II. cis- and trans-2-Methyl-1-tetralol, Synthetic Route of 1949-41-3, the publication is Journal of the American Chemical Society (1950), 3194-8, database is CAplus.

cf. C.A. 44, 7254a. Details are given of the preparation of BzCH₂CHMeCO₂H (60%), PhCH₂CH₂CHMeCO₂H (85%), and 3, 4-dihydro-2-methyl-1(2H)-naphthalenone (I) (92%). Reduction of 10 g. I in 150 ml. 95% EtOH with 10 g. Na gives 2 g. crude trans-1,2,3,4-tetrahydro-2-methyl-1-naphthol (II), m. 74-5¡ã; if the filtrate from the recrystallization is added to another batch of I being reduced, the yield of II is 3-4 g.; 3,5-dinitrobenzoate, light yellow, m. 155-6¡ã. I (10 g.) in 40 ml. absolute EtOH, hydrogenated over 4 g. Raney Ni (9 hrs.) at room temperature and 45 lb./sq. in. and purified through the phenylurethan (m. 122-4¡ã, 67%), gives the cis isomer (III) of II, b_0.2-0.3 90-4¡ã, n_D²⁰ 1.5502. II yields 81% Me trans-1,2,3,4-tetrahydro-2-methyl-1-naphthylxanthate (IV), m. 58-9¡ã; cis isomer (V), m. 71-2¡ã, 17%. II acetate (VI), m. 61-2¡ã; III acetate (VII), b_0.2-0.3 86-92¡ã, n_D²⁰ 1.5192. Reduction of I over Cu chromite at 100¡ã and 1600 lb./sq. in. gives 2-methyl-3, 4-dihydronaphthalene (VIII), b_0.6 63-5¡ã, n_D²⁰ 1.5751, d₂₀²⁰ 0.9837 (picrate, unstable, m. 70-4¡ã). V is stable at 98-100¡ã, whereas IV is rapidly decomposed, forming VIII. VII is much more stable than VI; VI gives VIII, whereas VII at 650¡ã gives 2-C₁₀H₇Me. The results are given as curves. These results are in agreement with the point of view that the Chugaev reaction and the simple thermal decomposition of acetates involve the intermediate formation of a transitory 6-membered ring with a cis-¦Â-H atom.

Journal of the American Chemical Society published new progress about 1949-41-3. 1949-41-3 belongs to catalysis-chemistry, auxiliary class Carboxylic acid,Benzene, name is 2-Methyl-4-phenylbutanoic acid, and the molecular formula is C11H14O2, Synthetic Route of 1949-41-3.

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