Tag: M.W=200-250

Sinha, Sujata published the artcileEffect of organic counter-ions on the surface activity, micellar formation and dye solubilization behaviour of cationic surfactants, Category: catalysis-chemistry, the publication is Indian Journal of Chemistry, Section A: Inorganic, Bio-inorganic, Physical, Theoretical & Analytical Chemistry (2002), 41A(5), 914-920, database is CAplus.

The effect of eight organic counterions (aliphatic, both mono and dicarboxylates) on the surface and micellar behavior of decyl and dodecyl ammonium carboxylates in aqueous solution has been examined by different physicochem. techniques such as surface tension, dye solubilization, conductance viscosity and NMR. The effect of these counter-ions as observed from surface activity, and critical micelle concentration (CMC) is explained in terms of their condensation /penetration onto/into the micelles. The decrease in CMC and increase in counter-ion binding of cationic surfactants is attributed to the increased hydrophobicity in alkyl chain of counter-ions. In the case of monocarboxylate counter-ions, CMC decreases significantly in the order: n-butyrate < propionate < acetate <formate, while for dicarboxylates decrease in CMC with increase in number of carbon atoms in the counter-ion is less substantial. Compared to monocarboxylates, dicarboxylate counter-ions condense strongly onto the micelle surface and thus are capable of being easily incorporated into the micelles and consequently show greater surface activity, and lower CMC of cationic surfactant. The effect of temperature on surface activity and micellar behavior of decyl ammonium succinate is also reported.

Indian Journal of Chemistry, Section A: Inorganic, Bio-inorganic, Physical, Theoretical & Analytical Chemistry published new progress about 2016-56-0. 2016-56-0 belongs to catalysis-chemistry, auxiliary class Active Esterification, name is Dodecylamineacetate, and the molecular formula is C7H13BrSi, Category: catalysis-chemistry.

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

Sun, Shaohuan published the artcileFrom Waste Biomass to Solid Support: Lignosulfonate as a Cost-Effective and Renewable Supporting Material for Catalysis, Product Details of C10H11NO4, the publication is Chemistry – A European Journal (2014), 20(2), 549-558, database is CAplus and MEDLINE.

Lignosulfonate (LS) is an organic waste generated as a byproduct of the cooking process in sulfite pulping in the manufacture of paper. In this paper, LS was used as an anionic supporting material for immobilizing cationic species, which can then be used as heterogeneous catalysts in some organic transformations. With this strategy, three lignin-supported catalysts were prepared including (1) lignin-SO₃Sc(OTf)₂, (2) lignin-SO₃Cu(OTf), and (3) lignin-IL@NH₂ (IL=ionic liquid). These solid materials were then examined in many organic transformations. It was finally found that, compared with its homogeneous counterpart as well as some other solid catalysts that are prepared by using different supports with the same metal or catalytically active species, the lignin-supported catalysts showed better performance in these reactions not only in terms of activity but also with regard to recyclability.

Chemistry – A European Journal 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 C5H10N2OS, Product Details of C10H11NO4.

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

Eudes, Aymerick published the artcileProduction of tranilast [N-(3′,4′-dimethoxycinnamoyl)-anthranilic acid] and its analogs in yeast Saccharomyces cerevisiae, COA of Formula: C11H12O4, the publication is Applied Microbiology and Biotechnology (2011), 89(4), 989-1000, database is CAplus and MEDLINE.

Biol. synthesis of therapeutic drugs beneficial for human health using microbes offers an alternative production strategy to the methods that are commonly employed such as direct extraction from source organisms or chem. synthesis. In this study, we evaluated the potential for yeast (Saccharomyces cerevisiae) to be used as a catalyst for the synthesis of tranilast and various tranilast analogs (cinnamoyl anthranilates). Several studies have demonstrated that these phenolic amides have antioxidant properties and potential therapeutic benefits including antiinflammatory, antiproliferative, and antigenotoxic effects. The few cinnamoyl anthranilates naturally produced in plants such as oats and carnations result from the coupling of various hydroxycinnamoyl-CoAs to anthranilic acid. In order to achieve the microbial production of tranilast and several of its analogs, we engineered a yeast strain to co-express a 4-coumarate/CoA ligase (4CL, EC 6.2.1.12) from Arabidopsis thaliana and a hydroxycinnamoyl/benzoyl-CoA/anthranilate N-hydroxycinnamoyl/benzoyltransferase (HCBT, EC 2.3.1.144) from Dianthus caryophyllus. This modified yeast strain allowed us to produce tranilast and 26 different cinnamoyl anthranilate mols. within a few hours after exogenous supply of various combinations of cinnamic acids and anthranilate derivatives Our data demonstrate the feasibility of rapidly producing a wide range of defined cinnamoyl anthranilates in yeast and underline a potential for the biol. designed synthesis of naturally and non-naturally occurring mols.

Applied Microbiology and Biotechnology 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, COA of Formula: C11H12O4.

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

Wu, Fan published the artcileHalogen Bond Induced Consecutive Csp³-H Aminations via Hydrogen Atom Transfer (HAT) Relay Strategy, Quality Control of 457-68-1, the publication is Organic Letters (2020), 22(6), 2135-2140, database is CAplus and MEDLINE.

An uncommon use of halogen bonding to induce intermol. Csp³-H amination while enabling a HAT relay strategy to access privileged pyrrolidines I [R = Me, Et, 4-OMeC₆H₄; Ar = Ph, 4-FC₆H₄, 4-BrC₆H₄, etc.] directly from alkanes was disclosed. Mechanistic studies support the presence of multiple halogen bond interactions at distinct reaction stages.

Organic 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 C8H19NO2, Quality Control of 457-68-1.

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

Dilman, Alexander D. published the artcileTrifluoromethylation of Salicyl Aldimines, Name: Trimethyl(perfluorophenyl)silane, the publication is Journal of Organic Chemistry (2007), 72(22), 8604-8607, database is CAplus and MEDLINE.

A method for the nucleophilic trifluoromethylation of salicyl aldimines, which do not contain an activating group at the nitrogen atom, has been described. The reaction proceeds through the initial generation of an intramol. boron complex followed by interaction with Me₃SiCF₃ activated by sodium acetate. Thus, BF₃.OEt₂ was added dropwise to a solution of imine I and EtN(i-Pr)₂ in CH₂Cl₂. After stirring for 2 h at room temperature, the solvent was evaporated in a vacuum followed by successive addition of DMF, Me₃SiCF₃, and AcONa to give up to 86% trifluoromethylated product II.

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, Name: Trimethyl(perfluorophenyl)silane.

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

Dilman, Alexander D. published the artcileTrifluoromethylation of N-Benzoylhydrazones, Quality Control of 1206-46-8, the publication is Journal of Organic Chemistry (2008), 73(14), 5643-5646, database is CAplus and MEDLINE.

A method for the nucleophilic trifluoromethylation of N-benzoylhydrazones using Me₃SiCF₃/AcONa leading to hydrazides, e.g., I (R = H, MeO, NO₂), has been described. The C=N bond of the hydrazones is activated by difluoroboron group, which is introduced by means of boron trifluoride and allylsilane.

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, Quality Control of 1206-46-8.

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

Harders, H. published the artcileUrinary copper excretion from rats following administration of aliphatic and alicyclic polyamines, Safety of N1,N1′-(Ethane-1,2-diyl)bis(ethane-1,2-diamine) dihydrochloride, the publication is Arzneimittel-Forschung (1980), 30(2), 254-8, database is CAplus and MEDLINE.

The effect of oral aliphatic and alicyclic tetramines and tetramine analogs (with 2 N-atoms substituted by O) on Cu excretion was compared with that of D-penicillamine in rats. TETA-HCl (3,6-diazaoctan-1,8-diamine-2HCl) [38260-01-4] and BE 6184-HCl (3,7-diazanonan-1,9-diamine-3HCl) [73510-17-5] were the most active substances. However, simultaneous administration of TETA and D-penicillamine did not potentiate the cupriuretic effect. TETA, s.c. administered, was 3-fold more effective than the orally administered drug.

Arzneimittel-Forschung 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, Safety of N1,N1′-(Ethane-1,2-diyl)bis(ethane-1,2-diamine) dihydrochloride.

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

Karasu, Feyza published the artcileMechanistic Studies of Photoinitiated Free Radical Polymerization Using a Bifunctional Thioxanthone Acetic Acid Derivative as Photoinitiator, HPLC of Formula: 5411-14-3, the publication is Macromolecules (Washington, DC, United States) (2009), 42(19), 7318-7323, database is CAplus.

A bifunctional photoinitiator for free radical polymerization, thioxanthone catechol-O,O’-diacetic acid, was synthesized, characterized, and compared to photoinitiator parameters of the monofunctional analog, 2-(carboxymethoxy)thioxanthone. Photophys. studies such as fluorescence, phosphorescence, and laser flash photolysis in addition to photopolymerizations of Me methacrylate show that the bifunctional photoinitiator is more efficient in polymer generation than the monofunctional derivative These studies suggest that initiator radicals are generated from a π-π* triplet state in an intramol. electron transfer, followed by proton transfer and decarboxylation to generate alkyl radicals, which initiate polymerization The initial electron transfer is faster for the bifunctional photoinitiator than the monofunctional derivative, which is based on laser flash photolysis studies. Because of the relatively fast intramol. radical generation from the triplet state (triplet lifetime = 490 ns), quenching by mol. oxygen is insignificant and polymerization of Me methacrylate proceeds efficiently without deoxygenation. At higher concentrations of initiator (âˆ? mM) intermol. electron transfer competes with intramol. electron transfer. Both processes, inter- and intramol. processes, yield initiating alkyl radicals.

Macromolecules (Washington, DC, United States) 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

Raju, Kalaivanan published the artcileSingle Crystal Growth of N-Benzyl-2-methyl-4-nitroaniline by Seeded Czochralski Pulling Technique for NLO and THz Applications, Quality Control of 201157-13-3, the publication is Crystal Research and Technology (2020), 55(4), 1900234, database is CAplus.

Single crystal of N-benzyl-2-methyl-4-nitroaniline (BNA), a potential organic nonlinear optical (NLO) material for terahertz (THz) pulse generation, is grown successfully from diffusion controlled melt environment by Czochralski pulling (Cz) technique and is reported for the first time. A solution grown crystal having habitual morphol. is used as a seed with pre-determined crystal rotations at constant melt temperature of 102°C. Unit cell structure of melt grown BNA is refined using single crystal X-ray diffraction (SCXRD) anal. and is compared with that of the solution grown one. Crystal packing with the dominance of intermol. hydrogen bonding such as C-H…O, N-H-O, and C-H…π is examined using 2D finger print (FP) plot and 3D Hirshfeld surface (HS) anal. The presence of minimal percentage of voids reflects the good stacking of mol. arrangement in the melt grown crystals when compared to the solution grown ones. Crystalline purity is confirmed by powder X-ray diffraction (PXRD) anal. Modes of vibrations of different functional groups present and wide optical transparency of the grown BNA are realized using Fourier-transform IR (FTIR) and UV-visible-near IR (UV-vis-NIR) spectroscopic analyses, resp. Thermal stability and m.p. are confirmed through differential scanning calorimetry (DSC).

Crystal Research and Technology 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

Okamura, Takaaki published the artcileOrganocatalytic asymmetric oxy-Michael addition to a γ-hydroxy-α,β-unsaturated thioester via hemiacetal intermediates, Recommanded Product: 2,4,6-Triisopropylbenzenethiol, the publication is Chemical Communications (Cambridge, United Kingdom) (2012), 48(42), 5076-5078, database is CAplus and MEDLINE.

An asym. oxy-Michael addition to a γ-hydroxy-α,β-unsaturated thioester via hemiacetal intermediates in the presence of Cinchona-alkaloid-thiourea-based bifunctional organocatalysts is reported. This method provides a novel enantioselective route to β-hydroxy carboxyl compounds, which in turn can be used to synthesize valuable chiral building blocks.

Chemical Communications (Cambridge, United Kingdom) 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, Recommanded Product: 2,4,6-Triisopropylbenzenethiol.

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