Tag: M.W=200-250

Kira, Mitsuo published the artcileA new mode of fluoride-ion exchange reactions between tetracoordinate silane and pentacoordinate fluorosilicate, SDS of cas: 312-40-3, the publication is Chemistry Letters (1995), 807-8, database is CAplus.

Intramol. fluoride-ion donor-acceptor systems such as [p- and m-(difluorophenylsilyl)phenyl]trifluorophenylsilicates showed a new mode of fluoride-ion exchange reactions in solution, for which a concerted bimol. exchange mechanism through cyclophane-like transition states was proposed on the basis of a dynamic ¹³C NMR anal. of rates and activation parameters.

Chemistry Letters 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, SDS of cas: 312-40-3.

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

Du, Manfei published the artcileRegiospecific amino bromine addition of ¦Â-nitrostyrene derivatives with acrylamide and N-bromobutanimide, Related Products of catalysis-chemistry, the publication is Gaodeng Xuexiao Huaxue Xuebao (2016), 37(5), 902-911, database is CAplus.

A new protocol for the high regioselective aminobromination of ¦Â-nitrostyrene derivatives with acrylamide and N-Bromobutanimide (NBS) as nitrogen/bromine sources was developed. ¦Â-Nitrostyrene derivatives reacted with acrylamide and NBS promoted by CH₃CH₂ONa at room temperature (without the protection of an inert gaseous atm.) in CH₂Cl₂, offered vicinal haloamine products in good yields (up to 83%). For the ¦Â-methyl-¦Â-nitrostyrene, the good yields (up to 98%) were also achieved in CH₃OH promoted by Na₂CO₃. Although the strong electron-donating substituents (e.g., OCH₃) on the 4-position of benzene ring could deactivated the reaction activity of ¦Â-nitrostyrene derivatives, the vicinal haloamines were also afforded as the sole addition product. Whereas strong electron-withdrawing substituents (e.g., NO₂) could activated reaction activity remarkably and the vicinal haloamines were afforded as the sole addition product, too. The result revealed that the addition reaction had a nucleophilic addition feature. The aminobromination of 25 examples of ¦Â-nitrostyrenes were investigated and the structure of all products were confirmed by the corresponding NMR (NMR) spectra and high resolution mass spectrometer (HRMS). A possible mechanism involving a nucleophilic conjugate addition was proposed.

Gaodeng Xuexiao Huaxue Xuebao 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, Related Products of catalysis-chemistry.

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

Gao, Jin Sheng published the artcilecatena-Poly[[[tetraaquacobalt(II)]-¦Ì-4,4′-bipyridine-¦Ê²N:N’] 1,2-phenylenedioxydiacetate 4,4′-bipyridine hemisolvate dihydrate], HPLC of Formula: 5411-14-3, the publication is Acta Crystallographica, Section E: Structure Reports Online (2006), 62(11), m2913-m2915, database is CAplus.

In the title compound, {[Co(C₁₀H₈N₂)(H₂O)₄](C₁₀H₈O₆).0.5C₁₀H₈N₂.2H₂O}_n, the Co atoms are bridged into a chain by 4,4′-bipyridine units; both the bridging and the uncoordinated 4,4′-bipyridine mols. are arranged around inversion centers and are centrosym. Two-dimensional fishing-net layers are built up through O-H¡¤¡¤¡¤N H-bond interactions. The diacid anions and uncoordinated H₂O mols. fill the space between the layers. A 3-dimensional supramol. network is built up by O-H¡¤¡¤¡¤O and O-H¡¤¡¤¡¤N H-bond interactions between H₂O mols., anions and 4,4′-bipyridine mols. Crystal data: triclinic, space group P1?, a 9.7417, b 11.443(2), c 13.916(3) ?, ¦Á 73.19(3), ¦Â 80.46(3), ¦Ã 69.63(3)¡ã, Z = 2, d_c = 1.496, 5567 observed reflections with I > 2¦Ò(I), R[F² > 2¦Ò(F²)] = 0.031, wR(F²) = 0.081.

Acta Crystallographica, Section E: Structure Reports Online 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 C10H10O6, HPLC of Formula: 5411-14-3.

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

Wang, Chong published the artcileBiomimetic donor-acceptor motifs in carbon nitrides: enhancing red-light photocatalytic selective oxidation by rational surface engineering, Product Details of C13H10F2, the publication is Applied Catalysis, B: Environmental (2021), 120259, database is CAplus.

Oxidation, especially selective oxidation by a heterogeneous catalyst with mol. oxygen, is a core technol. for the conversion of petrochem. feedstock to commodity chems. and pharmaceuticals. Existing catalytic approaches for efficient aerobic oxidation normally rely on the engagement of organometallic centers or transition-metal nanoparticles. In light of the necessity to develop sustainable production methodologies, multiple approaches for the metal-free polymeric carbon nitride (PCN) photocatalytic selective oxidation have been evaluated. However, the insufficient visible light optical absorption, poor charge-carriers separation and the weak driving force towards oxidation reaction impart a serious restriction on the efficiency and selectivity of the organic photosynthesis, especially under extended wavelength solar light irradiation Here, we report a surface engineering photochem. modification method to fabricate a donor-acceptor (D-A) functional carbon nitride photocatalyst (ECN) under ambient conditions. The well-developed D-A structure, preserved high crystallinity and enlarged ¦Ð-conjugation framework of the hybrid semiconductor-mol. ECN samples favor the improvement of the optical absorption, as well as the enhanced separation and migration of the photo-generated charge carriers. As a result, the obtained ECN photocatalysts exhibited remarkable enhancement in the photocatalytic aerobic oxidation of alcs., even under an extended light wavelength of 620 nm red-light irradiation The photocatalytic aerobic sulfides and sp³ C-H oxidation reactions were also considerably accelerated over ECN and may serve as a direct approach for the construction of value-added sulfoxide and ketone products.

Applied Catalysis, B: Environmental 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 C10H10O2, Product Details of C13H10F2.

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

Nakamoto, Masami published the artcilePreparation and crystal structures of gold(I) complexes of a series of benzenethiolates: pair formation by gold-to-gold interactions of (benzenethiolato)(triphenylphosphine)gold(I), Application In Synthesis of 22693-41-0, the publication is Chemische Berichte (1993), 126(3), 605-10, database is CAplus.

Ph₃PAuCl reacts readily with PhSH and sterically hindered 2,4,6-R₃C₆H₂SH in the presence of NEt₃ to yield stable Ph₃PAu(SC₆H₂R₃-2,4,6) (1–4; R = H, Me, Et, CHMe₂, resp.). The crystal structures of these complexes were determined by single-crystal x-ray diffraction anal. In all compounds the Au atoms are linearly 2-coordinate with very similar bond lengths and angles. While 2–4 with bulky thiolate ligands are monomeric in the crystal lattice, 1 forms pairs of mols. with intermol. Au-Au contacts of 313.5(5) pm. The Moessbauer spectra of the complexes exhibit large isomer shifts (I.S.), of 3.06¡ú3.72 mm s^-1, and quadrupole splittings (Q.S.), of 7.90¡ú8.68 mm s^-1. These data can be attributed to the strong electron-donating properties of the benzenethiolate ligands. The Au-Au contacts in 1 lead to I.S. and Q.S. values which are slightly smaller than those of 2–4. The Au-S distances do not show a major influence of the S-Au-P pairing in 1 as compared to 2–4.

Chemische Berichte published new progress about 22693-41-0. 22693-41-0 belongs to catalysis-chemistry, auxiliary class Other Functionalization Reagent, name is 2,4,6-Triisopropylbenzenethiol, and the molecular formula is C15H24S, Application In Synthesis of 22693-41-0.

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

Monte, Manuel J. S. published the artcileVapor pressures, enthalpies and entropies of sublimation of trans-cinnamic acid and of nine methoxy and dimethoxycinnamic acids, HPLC of Formula: 16909-09-4, the publication is Journal of Chemical Thermodynamics (1999), 31(11), 1443-1456, database is CAplus.

The Knudsen mass-loss effusion technique was used to measure the vapor pressure as a function of temperature for trans-cinnamic acid and nine substituted methoxy and dimethoxy cinnamic acids. From the temperature dependence of the vapor pressure, the standard molar enthalpies and entropies of sublimation at 298.15 K were calculated for all the studied compounds using the estimated value ¦¤_cr^gc_p,m^o = -50 J¡¤K^-1¡¤mol^-1. The results obtained for trans-cinnamic acid and for the trans-methoxy and trans-dimethoxy cinnamic acids together with literature results for benzoic acid and substituted methoxy and dimethoxy benzoic acids allowed us to derive the correlation: ¦¤_cr^gH_m^o{T(p = 0.5 Pa)}/(kJ¡¤mol^-1) = (0.623 ¡À 0.026)¡¤{T(p = 0.5 Pa)/K} + (-106.3 ¡À 9.4) where T(p = 0.5 Pa) is the temperature at which the equilibrium vapor pressure of each crystalline compound is 0.5 Pa. (c) 1999 Academic Press.

Journal of Chemical Thermodynamics published new progress about 16909-09-4. 16909-09-4 belongs to catalysis-chemistry, auxiliary class Alkenyl,Carboxylic acid,Benzene,Ether, name is (E)-3-(2,4-Dimethoxyphenyl)acrylic acid, and the molecular formula is C11H12O4, HPLC of Formula: 16909-09-4.

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

Bock, Harald published the artcileStructure of bis(pentafluorophenyl)xenon, Xe(C₆F₅)₂, Synthetic Route of 1206-46-8, the publication is Angewandte Chemie, International Edition (2002), 41(3), 448-450, database is CAplus and MEDLINE.

Reaction of Me₃SiC₆F₅ with XeF₂ in CH₂Cl₂ gave Xe(C₆F₅)₂ (1). The x-ray crystal structure of 1 was determined The exptl. results are supported by MP2 and DFT (B3LYP) calculations

Angewandte Chemie, International Edition 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, Synthetic Route of 1206-46-8.

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

Takahashi, Eiki published the artcileDiscovery of potent transient receptor potential vanilloid 1 antagonists: Design and synthesis of phenoxyacetamide derivatives, Application of 2-(4-(Trifluoromethyl)phenoxy)acetic acid, the publication is Bioorganic & Medicinal Chemistry Letters (2013), 23(11), 3154-3156, database is CAplus and MEDLINE.

We aimed to discover a novel type of transient receptor potential vanilloid 1 (TRPV1) antagonist because such antagonists are possible drug candidates for treating various disorders. We modified the structure of hit compound I (human TRPV1 IC₅₀ = 411 nM) and converted its pyrrolidino group to a (hydroxyethyl)methylamino group, which substantially improved inhibitory activity (II; human TRPV1 IC₅₀ = 33 nM). In addition, II ameliorated bladder overactivity in rats in vivo.

Bioorganic & Medicinal Chemistry Letters published new progress about 163839-73-4. 163839-73-4 belongs to catalysis-chemistry, auxiliary class Trifluoromethyl,Fluoride,Carboxylic acid,Benzene,Ether, name is 2-(4-(Trifluoromethyl)phenoxy)acetic acid, and the molecular formula is C8H6ClNO3S2, Application of 2-(4-(Trifluoromethyl)phenoxy)acetic acid.

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

Takahashi, Eiki published the artcileDiscovery of potent transient receptor potential vanilloid 1 antagonists: Design and synthesis of phenoxyacetamide derivatives, Name: 2-(4-(tert-Butyl)phenoxy)acetic acid, the publication is Bioorganic & Medicinal Chemistry Letters (2013), 23(11), 3154-3156, database is CAplus and MEDLINE.

We aimed to discover a novel type of transient receptor potential vanilloid 1 (TRPV1) antagonist because such antagonists are possible drug candidates for treating various disorders. We modified the structure of hit compound I (human TRPV1 IC₅₀ = 411 nM) and converted its pyrrolidino group to a (hydroxyethyl)methylamino group, which substantially improved inhibitory activity (II; human TRPV1 IC₅₀ = 33 nM). In addition, II ameliorated bladder overactivity in rats in vivo.

Bioorganic & Medicinal Chemistry Letters 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 C14H31NO2, Name: 2-(4-(tert-Butyl)phenoxy)acetic acid.

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

Saito, Kaori published the artcileCalix[4]arenes bearing four redox-active ¦Ð-conjugated pendant groups for a dimensionally oriented redox system, Quality Control of 1798-04-5, the publication is Bulletin of the Chemical Society of Japan (2002), 75(8), 1845-1846, database is CAplus.

A p-tert-butylcalix[4]arene I [R = CH₂CONH(p-C₆H₄NH)₃Ac], bearing four redox-active phenylenediamine pendant groups on the lower rim, was synthesized and characterized spectroscopically and electrochem. The interconversion of the oxidation states of the pendant groups was demonstrated both chem. and electrochem.

Bulletin of the Chemical Society of Japan 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, Quality Control of 1798-04-5.

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