Tag: M.W=200-250

Bibawy, Talaat A. published the artcileFlotation behavior of hematite, Name: Dodecylamineacetate, the publication is Tenside Detergents (1982), 19(1), 18-22, database is CAplus.

The flotation of hematite??[1317-60-8] was studied with cetyltrimethylammonium?bromide (I) [57-09-0], cetylpyridinium?bromide (II) [140-72-7], dodecylammonium?acetate (III) [2016-56-0], and cetylammonium?acetate (IV) [2016-52-6] as cationic collectors and Aerosol?OT (branched dodecylbenzenesulfonate) [577-11-7], Na?dodecyl?sulfate??[151-21-3], Na?dodecylbenzenesulfonate??[25155-30-0], and Na?oleate (V) [143-19-1] as anionic collectors. The flotation of hematite by I and II was <50%, indicating they are not efficient collectors. Flotation by III and IV was >75%. For anionic collectors, adsorption isotherms were similar except for V. Recoveries of hematite were maximum at the critical concentration of the collector.

Tenside Detergents 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, Name: Dodecylamineacetate.

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

Teong, Siew Ping published the artcileCopper catalysed alkynylation of tertiary amines with CaC₂ via sp³ C-H activation, Quality Control of 2909-77-5, the publication is Green Chemistry (2016), 18(12), 3499-3502, database is CAplus.

A mild and easy-to-handle protocol to produce propargylamines with a terminal alkyne through catalytic cross-coupling of tertiary amines and calcium carbide was developed. The reaction proceeds via sp³ C-H bond activation and C-C coupling. Good to excellent yields were obtained for the corresponding propargylamines with both alkyl and aryl substitutions. The development of these functionalized propargylamines with a terminal alkyne group will offer a wider application for the synthesis of natural or pharmaceutical products due to their unique sp C-H reactivity.

Green Chemistry published new progress about 2909-77-5. 2909-77-5 belongs to catalysis-chemistry, auxiliary class Amine,Benzene, name is 2,6-Diisopropyl-N,N-dimethylaniline, and the molecular formula is C9H5ClO2, Quality Control of 2909-77-5.

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

Shu, Xin published the artcileDirect synthesis of Fe(III) immobilized Zr-based metal-organic framework for aerobic oxidation reaction, Quality Control of 457-68-1, the publication is Applied Organometallic Chemistry (2017), 31(12), n/a, database is CAplus.

A Zr-based metal-organic framework with bipyridine units (UiO-67) I has been utilized for the immobilization of catalytically active iron species via a post-synthetic metalation method. UiO-67 bipyridine MOF I was synthesized through a simple solvothermal method and was shown to have a UiO-type structure. Post-synthetic metalation of UiO-67 MOF I was performed for the immobilization of the catalytically active FeCl₃. FT-IR and EDX element map suggested that FeCl₃ is coordinately bonded to the UiO-67 bipyridine framework. The synthesized UiO-67-FeCl₃?II catalyst was used for the aerobic oxidation of alcs. such as 4-methoxybenzyl alc., 1,2,3,4-tetrahydronaphthalen-1-ol, thiophen-2-ylmethanol, etc. and benzylic compounds such as ethylbenzene, 9H-fluorene and (4-fluorophenyl)methane in the presence of mol. oxygen. In addition, the UiO-67-FeCl₃?II catalyst can be reused as a solid heterogeneous catalyst without compromising its activity and selectivity.

Applied Organometallic Chemistry 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 C19H14Cl2, Quality Control of 457-68-1.

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

He, Xingrui published the artcileFinding new elicitors that induce resistance in rice to the white-backed planthopper Sogatella furcifera, Recommanded Product: 2-(4-(tert-Butyl)phenoxy)acetic acid, the publication is Bioorganic & Medicinal Chemistry Letters (2015), 25(23), 5601-5603, database is CAplus and MEDLINE.

Herein we report a new way to identify chem. elicitors that induce resistance in rice to herbivores. Using this method, by quantifying the induction of chems. for GUS activity in a specific screening system that we established previously, 5 candidate elicitors were selected from the 29 designed and synthesized phenoxyalkanoic acid derivatives Bioassays confirmed that these candidate elicitors could induce plant defense and then repel feeding of white-backed planthopper Sogatella furcifera.

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 C12H16O3, Recommanded Product: 2-(4-(tert-Butyl)phenoxy)acetic acid.

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

Ouyang, Hao published the artcileSynthesis and Characterization of Dinuclear Salan Rare-Earth Metal Complexes and Their Application in the Homo- and Copolymerization of Cyclic Esters, Name: N1,N2-Dibenzylethane-1,2-diamine, the publication is Inorganic Chemistry (2018), 57(15), 9028-9038, database is CAplus and MEDLINE.

Four rare-earth-metal aryloxo complexes stabilized by a tetradentate Salan ligand were prepared, and their catalytic properties for the (co)polymerization of lactides and ¦Å-caprolactone were elucidated. The proton-exchange reactions of (C₅H₅)₃Ln(THF) with the Salan ligand N,N’-(CH₂Ph)₂-N,N’-[CH₂(2-OH-C₆H₂-Me₂-3,5)]₂ (LH₂) in a 1:1 molar ratio, and subsequently with 1 equiv of p-methylphenol, gave the rare-earth-metal aryloxides [LLn(OC₆H₄-4-CH₃)(THF)_n]₂ [n = 0 and Ln = Y (1), Sm (2), and Nd (3); n = 1 and Ln = La (4)] in good isolated yields. These complexes were fully characterized by elemental anal., IR, and NMR spectroscopy (for complexes 1 and 4). Solid-state structures of complexes 1-4 were confirmed by single-crystal X-ray diffraction anal. Complexes 1-4 have dinuclear solid-state structures, with a Ln₂O₂ core bridging the Salan ligands. The coordination geometry around each of the metals is a slightly distorted octahedron in complexes 1-3, whereas it is a capped trigonal prism in complex 4. It was found that complexes 1-4 can initiate efficiently the homopolymerization of L-lactide (L-LA) and rac-lactide (rac-LA) at 30 ¡ãC in THF. The increasing activity of these complexes is in agreement with increasing ionic radii. A kinetic study revealed that seven-coordinated lanthanum complex 4 is more active for rac-LA polymerization compared with L-LA. A further study revealed that complex 4 was also an efficient initiator for the random copolymerization of L-LA and ¦Å-caprolactone with the simultaneous addition of these two monomers, and the T_g values of the copolymers obtained increase linearly from -30.2 to +38.3 ¡ãC with an increase of the percentage of LA units. A mechanism study revealed that transesterification plays a crucial role in the formation of a random copolymer.

Inorganic Chemistry 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, Name: N1,N2-Dibenzylethane-1,2-diamine.

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

Zhao, Guangkuan published the artcileChlorotrimethylsilane and Sodium Iodide: A Remarkable Metal-Free Association for the Desulfurization of Benzylic Dithioketals under Mild Conditions, Recommanded Product: Bis(4-fluorophenyl)methane, the publication is Advanced Synthesis & Catalysis (2018), 360(13), 2522-2536, database is CAplus.

A novel metal-free process allowing the reductive desulfurization of various benzylic dithioketals to afford arylmethanes and benzylester derivatives with good to excellent yields was reported. At room temperature, this mild reduction process required only the use of TMSCl and NaI in CH₂Cl₂ and tolerated a large variety of functional groups.

Advanced Synthesis & Catalysis 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 C18H24N6O6S4, Recommanded Product: Bis(4-fluorophenyl)methane.

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

Zhang, Muliang published the artcileDeoxygenative Deuteration of Carboxylic Acids with D₂O, Synthetic Route of 22693-41-0, the publication is Angewandte Chemie, International Edition (2019), 58(1), 312-316, database is CAplus and MEDLINE.

C1-Deuterated aryl and alkyl aldehydes such as 4-PhC₆H₄CDO and PhCH₂CH₂CDO were prepared chemoselectively with 58-96% deuterium incorporation by reduction of aromatic and aliphatic carboxylic acids using iridium photocatalysts, either Ph₃P or Ph₂OEt as an oxygen acceptor, 2,4,6-i-Pr₃C₆H₂SH as a hydrogen atom donor, and using D₂O as an inexpensive deuterium source. The method was used for the preparation of deuterated derivatives of pharmaceuticals and natural products containing aromatic carboxylic acid moieties. The method was also used for chemoselective reduction of aryl and alkyl carboxylic acids to the corresponding aldehydes using H₂O as a hydrogen atom source.

Angewandte Chemie, International Edition 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 C8H11BO3, Synthetic Route of 22693-41-0.

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

Liang, Yu-Feng published the artcileMetal-Free I₂-Catalyzed Highly Selective Dehydrogenative Coupling of Alcohols and Cyclohexenones, Name: 4-(Phenoxymethyl)benzoic acid, the publication is Chinese Journal of Chemistry (2018), 36(3), 233-240, database is CAplus.

The I₂ catalyzed highly selective oxidative condensation of cyclohexenones and alcs. for the synthesis of aryl alkyl ethers was described. DMSO was employed as the mild terminal oxidant. This novel methodol. offered a metal-free reaction condition, operational simplicity and broad substrate scope to afford valuable products from inexpensive reagents. Various meta-substituted aromatic ethers which were hardly synthesized from the reported methods requiring meta-substituted phenols were efficiently prepared by the present protocol.

Chinese Journal of Chemistry published new progress about 31719-76-3. 31719-76-3 belongs to catalysis-chemistry, auxiliary class Carboxylic acid,Benzene,Ether, name is 4-(Phenoxymethyl)benzoic acid, and the molecular formula is C14H12O3, Name: 4-(Phenoxymethyl)benzoic acid.

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

Fan, Tian-Yun published the artcileStructure-activity relationship and biological evaluation of berberine derivatives as PCSK9 down-regulating agents, Recommanded Product: 1,2-Dimethoxy-4-(2-nitrovinyl)benzene, the publication is Bioorganic Chemistry (2021), 104994, database is CAplus and MEDLINE.

Proprotein convertase subtilisin/kexin type 9 (PCSK9) is a secreted protein and its deficiency markedly enhances the survival rate of patients with cardiovascular diseases (CVDs). Forty berberine (BBR) derivatives I (R¹ = H, MeO, R² = MeO, OH, PhCH₂O, EtO, R³ = MeO, OH, EtO, R²R³ = OCH₂O, R⁴ = H, MeO, R⁵ = H, Cl, MeO, PhCH₂O, cyclobutylmethoxy, etc., R⁶ = MeO, OH, R⁷ = MeO, EtO, H) were synthesized and evaluated for their activity on down-regulating the transcription of PCSK9 in HepG2 cells, taking BBR as the lead. Structure-activity relationship (SAR) anal. revealed that the 2,3-dimethoxy moiety might be beneficial for activity. Among them, I (R¹ = R⁴ = R⁷ = H, R² = R³ = R⁶ = MeO, R⁵ = p-F₃CSC₆H₄CH₂O) (II) displayed the most potent activity with an IC₅₀ value of 9.5 ¡À 0.5¦ÌM, better than that of BBR. Also, it significantly decreased the PCSK9 protein level at the cellular level, as well as in the liver and serum of mice in vivo. Furthermore, II markedly increased LDLR expression and LDL-C clearance via down-regulating PCSK9 protein. The mechanism of action of II is targeting HNF1¦Á and/or Sp1 cluster modulation upstream of PCSK9, a different one from BBR. Therefore, II might have the potential to be a novel PCSK9 transcriptional inhibitor for the treatment of atherosclerosis, worthy for further investigation.

Bioorganic 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, Recommanded Product: 1,2-Dimethoxy-4-(2-nitrovinyl)benzene.

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

Moore, Whylder published the artcileSpin-spin interaction and relaxation in two trityl-nitroxide diradicals, Product Details of C10H25NO2Si, the publication is Journal of Magnetic Resonance (2021), 107078, database is CAplus and MEDLINE.

Trityl-nitroxides show substantial promise as polarizing agents in solid state dynamic nuclear polarization. To optimize performance it is important to understand the impact of spin-spin interactions on relaxation times of the diradicals. CW spectra and electron spin relaxation were measured for two trityl-nitroxides that differ in the substituents on the amide linker and have different strengths of the exchange interaction J. Anal. of the EPR spectra in terms of overlapping AB spin-spin splitting patterns explains the impact of J on various regions of the spectra. Even modest values of J are large relative to the separation between trityl and nitroxide resonances for some nitrogen nuclear spin state. Two conformations for each diradical were observed in CW spectra in fluid solution at X-band and Q-band. For one diradical J = 15 G (83%) and 5 G (17%) at 293 K, and J = 27 G (67%) and 3 G (33%) with interspin distances of 16 ? and 12 ?, resp., at 80 K. For the second diradical the exchange interaction is stronger: the two conformations in fluid solution at 293 K had J = 113 G (67%) and 59 G (33%) and at 80 K the value of J was 43 G and there were two conformations with interspin distances of 13 and 11.5 ?. The observation of two conformations for each diradical, with different values of J, demonstrates the dependence of their exchange interactions on through-bond orbital interactions. X-band values of spin relaxation rates 1/T1 and 1/Tm at 80 to 120 K for the trityl-nitroxides are similar to values for nitroxide mono-radicals, and faster than for trityl radicals. These observations show that even for a relatively small value of J, the nitroxide is very effective in enhancing the relaxation of the more slowly relaxing trityl.

Journal of Magnetic Resonance published new progress about 215297-17-9. 215297-17-9 belongs to catalysis-chemistry, auxiliary class Linker,PROTAC Linker, name is 2-(2-((tert-Butyldimethylsilyl)oxy)ethoxy)ethan-1-amine, and the molecular formula is C10H25NO2Si, Product Details of C10H25NO2Si.

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