Tag: M.W=200-250

Yang, Bin published the artcileSynthesis of Difluoroalkylated Arenes by Hydroaryldifluoromethylation of Alkenes with ¦Á,¦Á-Difluoroarylacetic Acids under Photoredox Catalysis, Product Details of C15H15OP, the publication is Organic Letters (2016), 18(22), 5956-5959, database is CAplus and MEDLINE.

A visible-light-induced hydroaryldifluoromethylation of alkenes with ¦Á,¦Á-difluoroarylacetic acids for preparation of difluoroalkylated arenes has been developed. This reaction proceeds through the hypervalent iodine reagent promoted decarboxylation and subsequent radical hydroaryldifluoromethylation.

Organic Letters published new progress about 4141-48-4. 4141-48-4 belongs to catalysis-chemistry, auxiliary class Aryl phosphine ligand,Mono-phosphine Ligands, name is Allyldiphenylphosphine oxide, and the molecular formula is C4H5BN2O2, Product Details of C15H15OP.

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

Mamiya, Mitsuo published the artcileSeparation of aluminum hydroxide and gypsum precipitated in the neutralization process by flotation, SDS of cas: 2016-56-0, the publication is Chika Shigen Kenkyu Shisetsu Hokoku (Akita Daigaku Kozangakubu) (1982), 1-9, database is CAplus.

Acid drainage from base metal mine generally contains considerable amounts of Fe²⁺, Al³⁺, and SO₄^2-. Such drainage is usually neutralized by CaCO₃ or Ca(OH)₂ after the oxidation of Fe²⁺ to Fe³⁺. The precipitates thus formed, which consist mainly of Fe(OH)₃, Al(OH)₃, and gypsum, are dumped into a mill tailing dam. In order to utilize these precipitates, the separation of Al(OH)₃ and gypsum by flotation was investigated. The flotability of Al(OH)₃ and gypsum was examined at various pH using dodecylammonium acetate, Na dodecyl sulfate, and Na oleate as collector. Dodecylammonium acetate was the most suitable. With a synthetic mixture of Al(OH)₃ and gypsum and dodecylammonium acetate as the collector, separation was good at pH 4-9. An artificial acid mine water containing Al³⁺ 500 and SO₄^2- 6000 mg/L was neutralized by CaCO₃ and the flotation was conducted with dodecylammonium acetate as the collector and starch the depressor for the Al(OH)₃, resulting in remarkable selectivity improvement. More than 90% of the gypsum was recovered in the froth and ?95% of the Al(OH)₃ in the sink.

Chika Shigen Kenkyu Shisetsu Hokoku (Akita Daigaku Kozangakubu) 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, SDS of cas: 2016-56-0.

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

Rit, Raja K. published the artcilePd(II)-Catalyzed ortho-C-H Oxidation of Arylacetic Acid Derivatives: Synthesis of Benzofuranones, COA of Formula: C15H14O3, the publication is Organic Letters (2014), 16(3), 968-971, database is CAplus and MEDLINE.

Pd(II)-catalyzed ortho-C-H acetoxylation of arylacetic acid derivatives, e.g., I (X= H), is demonstrated with the aid of a novel S-methyl-S-2-pyridylsulfoximine (MPyS) directing group (DG). The ¦Á-mono- and ¦Á-unsubstituted arylacetic acid derivatives were readily employed in the ortho-C-H acetoxylations. The oxidation products, e.g., I (X= OAc), are hydrolyzed, and the MPyS-DG is easily recovered, providing ready access to o-hydroxyarylacetic acids. 3-Mono- and 3-unsubstituted benzofuranones, e.g., II, are synthesized from o-hydroxyarylacetic acids.

Organic Letters 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

Tanifuji, Kazuki published the artcileA Convenient Route to Synthetic Analogues of the Oxidized Form of High-Potential Iron-Sulfur Proteins, Product Details of C15H24S, the publication is Inorganic Chemistry (2014), 53(8), 4000-4009, database is CAplus and MEDLINE.

An amide-bound [Fe₄S₄]³⁺ cluster, [Fe₄S₄{N(SiMe₃)₂}₄]^– (1), was found to serve as a convenient precursor for synthetic analogs of the oxidized form of high-potential Fe-S proteins. Treatment of 1 with 4 equiv of bulky thiols led to replacement of the amide ligands with thiolates, giving rise to [Fe₄S₄(SR)₄]^– clusters (R = Dmp (2a), Tbt (2b), Eind (2c), Dxp (2d), Dpp (2e); Dmp = 2,6-di(mesityl)phenyl, Tbt = 2,4,6-tris[bis(trimethylsilyl)methyl]phenyl, Eind = 1,1,3,3,5,5,7,7-octaethyl-s-hydrindacen-4-yl, Dxp = 2,6-di(m-xylyl)phenyl, Dpp = 2,6-diphenylphenyl). These clusters were characterized by the mass spectrum, the EPR spectrum, and x-ray crystallog. The redox potentials of the [Fe₄S₄]^3+/2+ couple, -0.82 V (2a), -0.86 V (2b), -0.84 V (2c), -0.74 V (2d), and -0.63 V (2e) vs. Ag/Ag⁺ in THF, are significantly more neg. than that of [Fe₄S₄(SPh)₄]^-/2- (-0.21 V).

Inorganic 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 C5H6N2O2, Product Details of C15H24S.

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

Kawakami, Yukio published the artcileSynthesis and complexation of an optically active aza crown ether, Recommanded Product: 2,2-(1,2-Phenylenebis(oxy))diacetic acid, the publication is Bulletin of the Institute for Chemical Research, Kyoto University (1983), 61(2), 117-19, database is CAplus.

Ethanolamine I was condensed with o-phenylenedioxyacetic acid or its p-nitrophenyl ester to give diamide II, which was cyclized with o-(BrCH₂)₂C₆H₄ in the presence of NaH to give aza crown ether III. The cation binding of III with Li, Na, and Mg perchlorates was assessed by CD and NMR spectra in MeCN.

Bulletin of the Institute for Chemical Research, Kyoto University 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, Recommanded Product: 2,2-(1,2-Phenylenebis(oxy))diacetic acid.

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

Makino, Takeshi published the artcileConcise synthesis of diborylxanthenes, Recommanded Product: Trimethyl(perfluorophenyl)silane, the publication is Synthesis (2008), 859-864, database is CAplus.

A simple and efficient synthesis of bidentate diborylxanthene derivatives is described involving cross-coupling and ipso-substitution reactions. E.g., silylation of dimethylxanthene (I; X = H) by sequential treatment with BuLi/TMEDA and Me₃SiCl gave 86% I (X = SiMe₃), which upon treatment with BBr₃ and then with H₂O gave 96% I [X = B(OH)₂].

Synthesis 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, Recommanded Product: Trimethyl(perfluorophenyl)silane.

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

Wang, Xiao-Xia published the artcileN-heterocyclic carbene-palladium(II)-1-methylimidazole complex-catalyzed Suzuki-Miyaura coupling of benzyl sulfonates with arylboronic acids, Application of Bis(4-fluorophenyl)methane, the publication is Organic & Biomolecular Chemistry (2015), 13(17), 4925-4930, database is CAplus and MEDLINE.

The first example of palladium-catalyzed Suzuki-Miyaura coupling between benzyl sulfonates and arylboronic acids was reported in this paper. In the presence of a well-defined, air-stable and easily available NHC-Pd(II)-Im complex, all reactions worked well to give the desired products in good to almost quant. yields under the optimal conditions. Electron-rich, -neutral, -poor and sterically-hindered substituents on both substrates are tolerated in such transformation, providing a convenient, efficient and alternative method for the synthesis of diarylmethanes.

Organic & Biomolecular 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 C25H47NO8, Application of Bis(4-fluorophenyl)methane.

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

Tian, Jia published the artcileSelective flotation separation of ilmenite from titanaugite using mixed anionic/cationic collectors, Safety of Dodecylamineacetate, the publication is International Journal of Mineral Processing (2017), 102-107, database is CAplus.

The flotation behavior of ilmenite and titanaugite using anionic collector sodium oleate (NaOL), cationic collector dodecylamine acetate (DAA) and the mixed anionic/cationic collector (NaOL-DAA) was investigated through micro-flotation experiments, zeta potential measurements, Fourier transform IR (FTIR) analyses, and the artificially mixed minerals flotation experiments The results of the microflotation experiments indicate that DAA exhibits good flotation performance to both ilmenite and titanaugite at a pH > 6.0. The flotation separation of ilmenite from titanaugite can be performed using the mixed NaOL-DAA in a wide pH range of 5.0-7.0. In this pH range, the recovery of ilmenite remains constant at approx. 90%, while the recovery of titanaugite remains < 25%. The best separation result can be achieved with NaOL-DAA molar ratios of 10:1. The results of the zeta potential experiments and the FTIR analyses indicate that the adsorption of the mixed collector, NaOL-DAA, on the ilmenite surface is larger than on the titanaugite surface and that the NaOL-DAA complex might be mainly adsorbed on the ilmenite surface by chem. adsorption, apart from electrostatic adsorption. The synthetic mineral mixture micro-flotation results demonstrate that, compared to NaOL, NaOL-DAA not only increases the recovery and grade of the TiO₂ by 7.02% and 6.71%, resp., but also decreases the reagent consumption by half.

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 C11H21BF4N2O2, Safety of Dodecylamineacetate.

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

Li, Zhaojing published the artcileAsymmetric Catalytic Synthesis of Hexahydropyrrolo-isoquinolines via Three-Component 1,3-Dipolar-Cycloaddition, Category: catalysis-chemistry, the publication is Chemistry – A European Journal (2021), 27(60), 14841-14845, database is CAplus and MEDLINE.

An asym. three-component 1,3-dipolar cycloaddition of 3,4-dihydroisoquinolines, bromoacetates and ¦Á,¦Â-unsaturated pyrazole amides was realized by using a chiral N,N’-dioxide-Y(OTf)₃ complex as the catalyst. The process included a base-promoted formation of dihydroisoquinolium ylides in situ, and a chiral Lewis acid-catalyzed asym. [3+2] cycloaddition with ¦Á,¦Â-unsaturated pyrazole amides. A series of hexahydropyrrolo-isoquinolines I [R = Pr, Ph, 4-BrC₆H₄, etc.; R¹ = Et, OMe, O-tBu, OBn; R² = H, 5-Br, 6-OMe, etc.] were obtained in moderate to good yields with excellent diastereo- and enantioselectivities.

Chemistry – A European Journal 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, Category: catalysis-chemistry.

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

Mei, Ren-Qiang published the artcileAsymmetric Michael/cyclization tandem reaction of 4-hydroxycoumarin with ¦Â-nitroalkenes catalyzed by chiral bifunctional thioureas, Application of 1,2-Dimethoxy-4-(2-nitrovinyl)benzene, the publication is Organic & Biomolecular Chemistry (2013), 11(8), 1286-1289, database is CAplus and MEDLINE.

The first asym. Michael/cyclization tandem reaction of 4-hydroxycoumarin with nitroolefins catalyzed by chiral bifunctional thioureas was reported and 2,3-dihydrofuro[3,2-c]coumarin adducts have been obtained in moderate yields (53-75%) and good enantioselectivities (64-90% ee).

Organic & Biomolecular 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, Application of 1,2-Dimethoxy-4-(2-nitrovinyl)benzene.

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