Tag: M.W=200-250

Hsu, Che Ju published the artcileSuperior improvement in dynamic response of liquid crystal lens using organic and inorganic nanocomposite, Application In Synthesis of 201157-13-3, the publication is Scientific Reports (2021), 11(1), 17349, database is CAplus and MEDLINE.

In this study, the response time of a 4 mm-aperture hole-patterned liquid crystal (HLC) lens has been significantly improved with doping of N-benzyl-2-methyl-4-nitroaniline (BNA) and rutile titanium dioxide nanoparticle (TiO₂ NP) nanocomposite. The proposed HLC lens provides the focus and defocus times that are 8.5x and 14x faster than the pristine HLC lens, resp. Meanwhile, the focus and defocus times of the proposed HLC lens reach the order of millisecond. Result shows that the synergistic effect of BNA and TiO₂ NP induces a 78% decrement in the viscosity of pristine LC mixture that significantly shortens the focus and defocus times of HLC lens. The remarkable decrement in viscosity is mainly attributed to spontaneous polarization elec. fields from the permanent dipole moments of the additives. Besides, the strengthened elec. field surrounding TiO2 NP assists in decreasing the focus time of HLC lens. The focus and defocus times of HLC lens are related to the wavefront (or phase profile) bending speed. The time-dependent phase profiles of the HLC lenses with various viscosities are calculated This result shows the decrease in wavefront bending time is not simply proportional to viscosity decrement. Furthermore, the proposed HLC lens emerges a larger tunable focus capability within smaller voltage interval than the pristine HLC lens.

Scientific Reports 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, Application In Synthesis of 201157-13-3.

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

Bansal, Shobha published the artcileAn efficient solvent free microwave assisted MgFe₂O₄ magnetic nanoparticles catalyzed green protocol towards Michael addition, Related Products of catalysis-chemistry, the publication is Chemistry & Chemical Technology (2019), 13(1), 18-22, database is CAplus.

MgFe₂O₄ magnetic nanoparticles were used as an efficient catalyst for the synthesis of Michael products by treating substituted chalcones and ¦Â-nitro styrenes with malononitrile and Et cyanoacetate in solvent-free microwave conditions. At 10 mol% catalyst loading, MgFe₂O₄ magnetic nanoparticles were a better heterogeneous catalyst tried for Michael addition than several reported catalysts. MgFe₂O₄ nanoparticles were used five times without appreciable loss of catalytic activity.

Chemistry & Chemical Technology 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

Rasajna, G. published the artcileGCMS analysis and evaluation of thrombolytic activity of essential oil obtain from the flowers of nyctanthes arbor tristislinn, Computed Properties of 140-28-3, the publication is Indian Research Journal of Pharmacy and Science (2020), 7(2), 2121-2131, database is CAplus.

Objective: The objectives of this study were to identify the chem. composition of the essential obtained from the flowers of Nyctanthes arbor tristis and to carry out in vitro thrombolytic activity studies. Methods: the essential oil was obtained from the flowers of Nyctanthes arbor tristis by hydrodistillation and the chem. composition was determined by gas chromatog.-mass spectrometry anal. Thrombolytic activity was conducted using %clot lysis assay using streptokinase as standard drug. Results: 11 compounds were identified in the essential oil in which betulin (26.58), (23.29%) Undec-10-ynoic acid, undec-2-en-1 -yl ester(23.29%), were predominant followed 1-propoxy propene (19.23%), 9,17-Octadecadienal (12.02%), in clot lysis assay the essential oil showed % clot lysis of 82.60, 86.36, 94.44, for 50mg/mL, 100mg/mL, 150mg/mL resp. Conclusion: The chem. composition of essential oil reveals the presence of betulin in higher concentration which is known for its thrombolytic activity in the clot lysis assay and all the 11 compounds are being reported for the first time in Nyctanthes arbor tristis flowers which fiend their use in cosmetic industry. Therefore the flowers of Nyctanthes arbor tristis grown in yanam region can be a good source of fragrance for cosmetic industry.

Indian Research Journal of Pharmacy and Science 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 C16H20N2, Computed Properties of 140-28-3.

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

Aksenov, Alexander V. published the artcileActivity of 2-Aryl-2-(3-indolyl)acetohydroxamates against Drug-Resistant Cancer Cells, Computed Properties of 4230-93-7, the publication is Journal of Medicinal Chemistry (2015), 58(5), 2206-2220, database is CAplus and MEDLINE.

Many types of tumor, including glioma, melanoma, non-small cell lung, esophageal, and head and neck cancer, among others, are intrinsically resistant to apoptosis induction and poorly responsive to current therapies with proapoptotic agents. In addition, tumors often develop multidrug resistance based on the cellular efflux of chemotherapeutic agents. Thus, novel anticancer agents capable of overcoming these intrinsic or developed tumor resistance mechanisms are urgently needed. The authors describe a series of 2-aryl-2-(3-indolyl)acetohydroxamic acids that are active against apoptosis- and multidrug-resistant cancer cells as well as glioblastoma neurosphere stem-like cell cultures derived from patients. Thus, the described compounds serve as a novel chem. scaffold for the development of potentially highly effective clin. cancer drugs.

Journal of Medicinal Chemistry 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, Computed Properties of 4230-93-7.

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

Aksenov, Alexander V. published the artcileMetal-free transannulation reaction of indoles with nitrostyrenes: a simple practical synthesis of 3-substituted 2-quinolones, COA of Formula: C10H11NO4, the publication is Chemical Communications (Cambridge, United Kingdom) (2013), 49(81), 9305-9307, database is CAplus and MEDLINE.

3-Substituted 2-quinolones are obtained via a novel, metal-free transannulation reaction of 2-substituted indoles with 2-nitroalkenes in polyphosphoric acid. The reaction can be used in conjunction with the Fisher indole synthesis offering a practical three-component heteroannulation methodol. to produce 2-quinolones from arylhydrazines, 2-nitroalkenes and acetophenone.

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 C10H11NO4, COA of Formula: C10H11NO4.

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

Gamage, Swarna A. published the artcileIntramolecular aromatic substitution with bisthiocarbocations. Variations of Lewis acid, solvent and orthothio substituents, Related Products of catalysis-chemistry, the publication is Australian Journal of Chemistry (1990), 43(5), 815-24, database is CAplus.

The effects of Lewis acid, solvent and orthothio substituent have been examined with regard to intramol. electrophilic aromatic substitution with bisthiocarbocations. A suspension of silver trifluoromethanesulfonate in dichloromethane, creating bis(arylthio)carbocations, was found to be the most effective for annulation of six-membered rings. E.g., o-phenylene trithiocarbonate was condensed with 3-MeOC₆H₄(CH₂)₃I to give 2-[3-(3-methoxyphenyl)propyl]-2-methylthio-1,3-benzodithiole which was subject to intramol. aromatic substitution to give 6-methoxy-1-tetralone.

Australian Journal of Chemistry 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, Related Products of catalysis-chemistry.

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

Okajima, Masayuki published the artcileGeneration of diarylcarbenium ion pools via electrochemical C-H bond dissociation, Recommanded Product: Bis(4-fluorophenyl)methane, the publication is Bulletin of the Chemical Society of Japan (2009), 82(5), 594-599, database is CAplus.

The “cation pools” of diarylcarbenium ions have been generated by the low-temperature electrochem. oxidation of diphenylmethane derivatives In addition to diphenylmethanes having various substituents, 9,10-dihydroanthracene, dibenzosuberane, and xanthenes, which are annulated derivatives of diphenylmethane were also found to serve as a precursor of cation pools. The generation of the diarylcarbenium ion was confirmed by low-temperature NMR anal. and cold-spray mass anal. Reactivity was also investigated by reactions with various carbon nucleophiles such as allyltrimethylsilane, 1,3,5-trimethylbenzene, and anisole.

Bulletin of the Chemical Society of Japan 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 C13H10F2, Recommanded Product: Bis(4-fluorophenyl)methane.

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

Okajima, Masayuki published the artcileOxidative Generation of Diarylcarbenium Ion Pools, SDS of cas: 457-68-1, the publication is Organic Letters (2006), 8(22), 5005-5007, database is CAplus and MEDLINE.

“Cation pools” of diarylcarbenium ions have been generated by the oxidative C-H bond dissociation of diarylmethanes using anodic oxidation “Diarylcarbenium ion pools” thus generated react with various nucleophiles, such as allylsilanes, ketene silyl acetals, and aromatic compounds The reductive homocoupling of the “diarylcarbenium ion pool” has been achieved. The dimer thus obtained also serves as a precursor of the “diarylcarbenium ion pool” via oxidative C-C bond dissociation

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 C13H10F2, SDS of cas: 457-68-1.

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

Kim, Jaeseung published the artcileSilanediol peptidomimetics. Evaluation of four diastereomeric ACE inhibitors, Formula: C12H10F2Si, the publication is Bioorganic & Medicinal Chemistry Letters (2004), 14(11), 2853-2856, database is CAplus and MEDLINE.

Four diastereomers, e.g., I [X = Si(OH)₂], of a Phe-Ala peptide mimic incorporating a central silanediol group have been individually prepared and tested as inhibitors of angiotensin-converting enzyme (ACE). Three of the silanediols exhibit levels of inhibition that are similar to those of corresponding ketones reported by Almquist. For the fourth diastereomer, with both stereogenic carbons inverted relative to the most active isomer I, the ketone gives the least enzyme inhibition whereas the silanediol shows a surprisingly low IC₅₀ value.

Bioorganic & Medicinal 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, Formula: C12H10F2Si.

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

Balachandran, S. B. published the artcileThe influence of point defects on the floatability of cassiterite, II. Electrostatic collector interactions, COA of Formula: C14H31NO2, the publication is International Journal of Mineral Processing (1987), 21(3-4), 173-84, database is CAplus.

Cassiterite flotation, irresp. of trace element dopants, follows the electrostatic theory of flotation with Na dodecyl sulfate and dodecyl ammonium acetate collectors. This behavior is the underlying mechanism for cassiterite flotation with a broad variety of collectors, though other attachment mechanisms are frequently superimposed on this basic mechanism. Flotation of cassiterite with these collectors is strongly influenced by the dopant present. The ease of flotation follows the pattern Fe³⁺-doped > undoped > Sb⁵⁺-doped cassiterite. The Fe³⁺-doped cassiterite floats at ?10% of the collector concentration required to float Sb⁵⁺-doped cassiterite.

International Journal of Mineral Processing 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 C14H31NO2, COA of Formula: C14H31NO2.

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