Tag: M.W=200-250

Gholivand, M. B. published the artcileHighly sensitive and selective measurement of bismuth in seawater and drug with 1,2-phenylenedioxydiacetic acid by cathodic adsorptive stripping voltammetry, Formula: C10H10O6, the publication is Electroanalysis (2006), 18(7), 730-734, database is CAplus.

A new method is presented for determination of Bi based on cathodic adsorptive stripping of complex Bi with 1,2-phenylenedioxydiacetic acid (PDA) at a hanging mercury drop electrode (HMDE). The effect of various parameters such as pH, concentration of ligand, accumulation potential and accumulation time on the selectivity and sensitivity were studied. The optimum conditions for determination of Bi include HNO₃ concentration 0.01 M, 8.0 ¡Á 10^-4 M PDA and accumulation time 120 s, accumulation potential of -200 mV. The limits of detection are 0.25 and 0.05 nM, and responses are linear 1-1000 and 0.1-400 nM at t_acc of 60 and 120 s, resp. Many common anions and cations do not interfere in the determination of Bi. The method was applied to the determination of Bi in some real samples such as sea- and spring water and drug.

Electroanalysis 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, Formula: C10H10O6.

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

Schrittwieser, Joerg H. published the artcileBiocatalytic Organic Synthesis of Optically Pure (S)-Scoulerine and Berbine and Benzylisoquinoline Alkaloids, COA of Formula: C15H14O3, the publication is Journal of Organic Chemistry (2011), 76(16), 6703-6714, database is CAplus and MEDLINE.

A chemoenzymic approach for the asym. total synthesis of the title compounds was described that employs an enantioselective oxidative C-C bond formation catalyzed by berberine bridge enzyme (BBE) in the asym. key step. This unique reaction yielded enantiomerically pure (R)-benzylisoquinoline derivatives and (S)-berbines such as the natural product (S)-scoulerine (I), a sedative and muscle relaxing agent. The racemic substrates required for the biotransformation were prepared in 4-8 linear steps using either a Bischler-Napieralski cyclization or a C1-C¦Á alkylation approach. The chemoenzymic synthesis was applied to the preparation of fourteen enantiomerically pure alkaloids, including the natural products (S)-scoulerine and (R)-reticuline (II), and gave overall yields of up to 20% over 5-9 linear steps.

Journal of Organic 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, COA of Formula: C15H14O3.

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

Schrittwieser, Joerg H. published the artcileBiocatalytic Enantioselective Oxidative C-C Coupling by Aerobic C-H Activation, Application In Synthesis of 1860-58-8, the publication is Angewandte Chemie, International Edition (2011), 50(5), 1068-1071, S1068/1-S1068/144, database is CAplus and MEDLINE.

The berberine bridge enzyme (BBE) was employed for the first preparative oxidative biocatalytic C-C coupling that leads to a new intramol. bond. This unique transformation requires O₂ as sole stoichiometric oxidant and gives access to novel optically pure (S)-berbine and (R)-1-benzyl-1,2,3,4-tetrahydroisoquinoline alkaloid derivatives by kinetic resolution

Angewandte Chemie, International Edition 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, Application In Synthesis of 1860-58-8.

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

Bala Subramanian, M. published the artcileFormation of waveguides in crystalline organic N-benzyl-2-methyl-4-nitroaniline thin films using femtosecond laser ablation process, Quality Control of 201157-13-3, the publication is Materials Letters (2021), 130220, database is CAplus.

This paper reports the feasibility of femtosecond laser etching of microstructures directly onto crystalline N-benzyl-2-methyl-4-nitroaniline (BNA) films grown on glass to realize single crystal BNA waveguides. The threshold fluence has been estimated and fluence range of 318.5-1274 mJ/cm² at 800 nm is used for ablation. Holes with diameter ranging from 13 to 26¦Ìm and waveguide patterns with width of 100¦Ìm are demonstrated. Grooves with laser transit gap <20¦Ìm is used to form smaller waveguides. Input faces of the waveguides have been simultaneously irradiated with red laser of 630 nm. The optical image of transmission confirms the wave-guiding. This study shows the feasibility of laser-etching waveguides on crystalline BNA films.

Materials Letters published new progress about 201157-13-3. 201157-13-3 belongs to catalysis-chemistry, auxiliary class Nitro Compound,Amine,Benzene, name is N-Benzyl-2-methyl-4-nitroaniline, and the molecular formula is C14H14N2O2, Quality Control of 201157-13-3.

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

Navarrete, Andres published the artcileSynthesis and nematocidal activities of N-(2-methylpropyl)-3-(X-phenyl)-2E-propenamides, Recommanded Product: (E)-3-(2,4-Dimethoxyphenyl)acrylic acid, the publication is Proceedings of the Western Pharmacology Society (2002), 114-117, database is CAplus and MEDLINE.

Various N-(2-methylpropyl)-3-(X-phenyl)-2E-propenamides were synthesized and evaluated for their nematocidal activities. N-(2-methylpropyl)-3-(X-phenyl)-2E propenamides, in which x was equal to -Cl, -F or -NO₂ at position 3 or di-OCH₃ at position 3,4 in the aromatic ring, showed nematocidal activity in vitro against Ascaris suum inducing morphol. changes in the cephalic region.

Proceedings of the Western Pharmacology Society 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, Recommanded Product: (E)-3-(2,4-Dimethoxyphenyl)acrylic acid.

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

Khalili, Dariush published the artcileImpregnated copper ferrite on mesoporous graphitic carbon nitride: An efficient and reusable catalyst for promoting ligand-free click synthesis of diverse 1,2,3-triazoles and tetrazoles, Name: 2,2-(1,2-Phenylenebis(oxy))diacetic acid, the publication is Applied Organometallic Chemistry (2019), 33(11), e5219, database is CAplus.

Synthesis of magnetic CuFe₂O₄/g-C₃N₄ hybrids via a facile method and their catalytic performances were evaluated via click chem. was reported. The structural and morphol. characterization of CuFe₂O₄, g-C₃N₄, CuFe₂O₄/g-C₃N₄ were carried out by different techniques such as X-ray diffraction, high-resolution transmission electron microscopy, field emission SEM, Fourier IR spectroscopy, vibrating sample magnetometry, thermogravimetric anal. and N₂ adsorption-desorption anal. (Brunauer-Emmett-Teller surface area). The utilization of magnetic CuFe₂O₄/g-C₃N₄ enabled superior performance in the one-pot azide-alkyne cycloaddition reaction in water using alkyl halides and epoxides as azide precursors without the need of any addnl. agents to afford triazoles I [R = cyclohexyl, allyl, Bn, etc.; Ar = Ph, 2-methoxynaphthalenyl] and II [Ar¹ = Ph, 2-methoxynaphthalenyl; R¹ = H, Ph, 4-ClC₆H₄; R² = H, Et, CH₂OPh, etc.]. Also 5-substituted 1H-tetrazoles III [Ar² = Ph, 4-MeC₆H₄, 2-ClC₆H₄, etc.] were prepared via [3 + 2] cycloaddition of sodium azide and aryl nitriles by using magnetic CuFe₂O₄/g-C₃N₄ nanoparticles. In addition, the catalytic system highly fulfilled the demands of “green click chem.” with its convenient conditions, especially easy access to a variety of significant products in low catalyst loading and simple work-up and isolation procedure.

Applied Organometallic Chemistry 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, Name: 2,2-(1,2-Phenylenebis(oxy))diacetic acid.

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

Thomson, George published the artcileA chain model for polyelectrolytes. IX. The effects of chain length and charge on the friction constant, Recommanded Product: N1,N1′-(Ethane-1,2-diyl)bis(ethane-1,2-diamine) dihydrochloride, the publication is Journal of the American Chemical Society (1963), 85(17), 2537-44, database is CAplus.

cf. CA 58, 9671g. Measurements are reported of self-diffusion and viscosity as a function of chain length and charge for some protonated and unprotonated amines and for some disulfonate ions. It is found that the Peterlin theory of diffusion of short-chain mols. (CA 46, 8935a) is an accurate description of real systems. The P. theory of viscosity is qual. correct but quant. in error by a factor of 2. The placement of 2 charges on an ethylenimine leads to an extended mol. configuration. The possibility of H bonding between uncharged ethylenimines and the water leads to zero slip between mol. and solvent. Therefore, classical hydrodynamic conditions are satisfied and the system behaves differently (larger friction constant) from what would be expected from other studies in nonhydrogen-bonding solvents. When charges are placed on the ion the local water structure is modified, decreasing the efficacy (or even possibility) of H bonding. There is a range of variables wherein the friction constant per bead drops on going from the neutral mol. to the bolion (CA 52, 19353e), because of the change in solvent interactions. The transition from simple ion to polyion requires more than 5 charges per ion and longer chain lengths than considered herein.

Journal of the American Chemical Society published new progress about 38260-01-4. 38260-01-4 belongs to catalysis-chemistry, auxiliary class Chelating Agents, name is N1,N1′-(Ethane-1,2-diyl)bis(ethane-1,2-diamine) dihydrochloride, and the molecular formula is C14H12O2, Recommanded Product: N1,N1′-(Ethane-1,2-diyl)bis(ethane-1,2-diamine) dihydrochloride.

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

Egetenmeyer, Simone published the artcileA 5′-cap for DNA probes binding RNA target strands, Computed Properties of 1798-04-5, the publication is Chemistry – A European Journal (2011), 17(42), 11813-11827, S11813/1-S11813/37, database is CAplus and MEDLINE.

Detecting short RNA strands with high fidelity at any of the bases of their sequence, including the termini, can be challenging, since fraying, wobbling, and refolding all compete with canonical base pairing. We performed a search for 5′-substituents of oligodeoxynucleotides that increase base pairing fidelity at the terminus of duplexes with RNA target strands. From a total of over 70 caps, differing in stacking moiety and linker, a phosphodiester-linked sequence of the residues of L-prolinol, glycine, and oxolinic acid, dubbed ogOA, was identified as a 5′-cap that stabilizes any of the four canonical base pairs, with ¦¤T_m values of up to +13.1 ¡ãC for an octamer. At the same time, the cap increases discrimination against any of the 12 possible terminal mismatches, including mismatches that are more stable than their perfectly matched counterparts in the control duplex, such as A:A. A probe with the cap also showed increased selectivity in the detection of two closely related microRNAs, let7c and let7a, with a ¦¤T_m value of 9.2 ¡ãC. Melting curves also yielded thermodn. data that shed light on the uniformity of mol. recognition in the sequence space of DNA:DNA and DNA:RNA duplexes. Hybridization probes with fidelity-enhancing caps should find applications in the individual and parallel detection of biol. active RNA species.

Chemistry – A European Journal 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, Computed Properties of 1798-04-5.

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

Light, B. published the artcileThe effect of triethylenetetramine dihydrochloride on the in vivo susceptibility of Pseudomonas aeruginosa to gentamicin, Category: catalysis-chemistry, the publication is Journal of Antibiotics (1979), 32(8), 834-8, database is CAplus and MEDLINE.

Triethylenetetramine-2HCl (I) [38260-01-4] increased the efficacy of gentamicin [1403-66-3] in vivo against a clin. isolate of P. aeruginosa, designated Ps 15. Mice which were inoculated with 10 x LD₅₀ of Ps 15 and treated with doses of 2?16 mg of gentamicin/kg/day all died. However, treatment with 8 mg of gentamicin/kg/day plus 30 mg I/day markedly reduced the mortality. The combined therapy also reduced the number of viable organisms that accumulated in the kidney during a 24-h period post inoculation. When a dosage level of 8 mg of gentamicin was exceeded in the combined treatment regimen, all of the infected mice died, and a high concentration of endotoxin could be detected in the mouse sera by the limulus assay.

Journal of Antibiotics published new progress about 38260-01-4. 38260-01-4 belongs to catalysis-chemistry, auxiliary class Chelating Agents, name is N1,N1′-(Ethane-1,2-diyl)bis(ethane-1,2-diamine) dihydrochloride, and the molecular formula is C6H20Cl2N4, Category: catalysis-chemistry.

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

Light, B. published the artcileEffect of triethylenetetramine dihydrochloride on the antibiotic susceptibility of Pseudomonas aeruginosa, Quality Control of 38260-01-4, the publication is Antimicrobial Agents and Chemotherapy (1978), 13(6), 979-84, database is CAplus and MEDLINE.

A chelating agent, triethylenetetramine-2HCl [38260-01-4], interacted synergistically in vitro with both gentamicin [1403-66-3] and carbenicillin [4697-36-3] against a clin. isolate of P. aeruginosa designated Ps 15. The minimal inhibitory concentrations of carbenicillin and gentamicin for Ps 15 in a 50% serum-Trypticase soy broth were 250 and 72.9 ¦Ìg/mL, resp. However, addition of triethylenetetramine-2HCl to the 50% serum-Trypticase soy broth decreased the minimal inhibitory concentrations of both antibiotics ?10-fold. A comparison of the growth of Ps 15 in 50% serum-Trypticase soy broth containing either of the antibiotics showed that a rapid decrease in the percentage of survivors only occurred when the chelating agent was present.

Antimicrobial Agents and Chemotherapy published new progress about 38260-01-4. 38260-01-4 belongs to catalysis-chemistry, auxiliary class Chelating Agents, name is N1,N1′-(Ethane-1,2-diyl)bis(ethane-1,2-diamine) dihydrochloride, and the molecular formula is C6H20Cl2N4, Quality Control of 38260-01-4.

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