Tag: M.W=200-250

Ono, K. published the artcileUpgrading of MgO in dolomite ore by froth flotation, Computed Properties of 2016-56-0, the publication is Publications of the Australasian Institute of Mining and Metallurgy (2010), 2215-2223, database is CAplus.

The dolomite deposit coexists with limestone (nearly 100% calcite) deposits in many cases in Japan. The mixing of limestone ore is inevitable in quarrying operation of dolomite ore and it is one reason to degrade the MgO grade of dolomite ore. Removing limestone from dolomite ore is, therefore, effective for upgrading the MgO content of products. However, as the mineralogical structure and phys. characteristics of dolomite mineral are similar to those of calcite, a fine grade separation of the both mineral particles is generally presumed to be difficult and practicable method for the beneficiation of dolomite has not been reported. A method for beneficiation of low grade dolomite ore is, herein, investigated for effective utilization of dolomitic resources in Japan. In order to meet the requirements from industries, the grade of MgO component of processed dolomite is targeted to be 19.0% or more in this research. The targeted grade for beneficiation was achieved by froth flotation with a cationic collector, i.e. Dodecylamine Acetate (DAA). Results of the flotation and the effects of other parameters influencing effectiveness of floatation and phenomenon observed in the floatation experiments of dolomite ore are herein reported.

Publications of the Australasian Institute of Mining and Metallurgy 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, Computed Properties of 2016-56-0.

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

Ishikawa, Nobuo published the artcileOrganic fluorine silicon compounds. VI. Preparation and reactions of functional diorganofluorosilanes, HPLC of Formula: 312-40-3, the publication is Kogyo Kagaku Zasshi (1969), 72(12), 2602-5, database is CAplus.

Ph2SiF2 (I) (0.1 mole) and 0.1 mole Ph2SiCl2 or (EtO)2SiPh2 was heated at 180-90¡ã C in the presence of 0.002 mole AlCl3 to give Ph2SiClF (II) and EtOSiFPh2 (III): for II, ¦¤G-(460¡ãK) = -0.26 kcal/mole K(460¡ãK) = 1.33; for III, the values were -2.65, 18.1. II was also formed (30%) by partial chlorination of I with AlCl3 in ether. Diorganochlorofluoro-silanes reacted with alkylamines, alcs. (phenol), and water to give diorganoalkylaminofluorosilanes, diorganoalkoxyfluoro-silanes, and 1,1,3,3-tetraorgano-1,3-difluorosiloxanes, resp. in 70-95% yields. The following RR1SiXF were prepared (R, R1, X, and b.p./mm given): Ph, Ph, NHPr, 130-5¡ã/3; Ph, Ph, morpholino(Z), 142-6¡ã/3; Ph, Me, NHPr, 63-6¡ã/3; Ph, Me, Z, 95-100¡ã/5; Ph, Ph, OEt, 110-13¡ã/3; Ph, Ph, OPr, 101-3¡ã/3; Ph, Ph, OBu, 109-13¡ã/2; Ph, Ph, OPh, 133-7¡ã/2; Ph, Me, OEt, 75-7¡ã/14; Ph, Me, OPr, 55-6¡ã/3; Ph, Me, OBu, 66-7¡ã/3; and Ph, Me, OPh, 98-100¡ã/3; The following RR1SiFOSiFRR1 were also prepared (R, R1, and b.p./mm given): Ph, Ph, 194-6¡ã/-3; and Ph, Me, 95-100¡ã/2. II and III were hydrolyzed to octaorganocyclotetrasiloxanes in the presence of alkylamines. NMR and ir spectral data were given.

Kogyo Kagaku Zasshi 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, HPLC of Formula: 312-40-3.

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

Ishikawa, Nobuo published the artcilePreparation and properties of alkali metal dialkyl(or -aryl)tetrafluorosilicates, Recommanded Product: Difluorodiphenylsilane, the publication is Nippon Kagaku Zasshi (1968), 89(7), 699-702, database is CAplus.

PhSiCl2(C6H4-Me-p), b6 152-4¡ã, was prepared from p-MeC6H4MgBr and PhSiCl3 in 60% yield. RR’SiCl2 was converted to RR’SiF2 (I) by heating with Na2SiF6. Thus, PhSiF2(C6H4Me-p), b11 130.5-1.5¡ã, was prepared in 70% yield. I and MF (where M is an alkali metal) in tetrahydrofuran, Me2CO, or MeCN stirred for 20 hrs. at room temperature gave alkali dialkyltetrafluorosilicate. Thus, K2[Ph2SiF4], Na2[Ph2SiF4], Cs2[Ph2SiF4], K2[MePhSiF4], Na2-[MePhSiF4], Cs2[MePhSiF4] and Cs2[Me2SiF4] were prepared These compounds are all hygroscopic substances, possess ir absorptions at approx. 1530 and approx. 1260 cm.-1 and decompose to R2SiF2 and MF on standing in the air. Thus, these complexes cannot be prepared in aqueous solution The rate of formation of C6H6 from Ph2SiF2 and PrNH3F or PhNH3F was measured and found to be faster with PrNH3F. The results are interpreted by assuming that complex formation is the rate-determining step and is dependent on the concentration of F-.

Nippon Kagaku Zasshi 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, Recommanded Product: Difluorodiphenylsilane.

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

Nakamura, Shuichi published the artcile1,4-Asymmetric reduction of ¦Ã-keto sulfoxides bearing the 2,4,6-triisopropylphenyl group, Category: catalysis-chemistry, the publication is Perkin 1 (2000), 3143-3148, database is CAplus.

Reduction of ¦Ã-keto sulfoxides bearing the 2,4,6-triisopropylphenyl group with DIBAL gives ¦Ã-hydroxy sulfoxides with high stereoselectivity in the ratio 95:5. In comparison with the lower stereoselectivities obtained in the reaction of ¦Ã-keto sulfoxides bearing p-tolyl or 2,4,6-trimethylphenyl groups, the sterically bulky (2,4,6-triisopropylphenyl)sulfinyl group is extremely efficient in effecting high 1,4-remote asym. induction.

Perkin 1 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, Category: catalysis-chemistry.

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

Sheiman, B. M. published the artcileSynthesis of alkylphenols from borates by the Friedel-Crafts reaction, Related Products of catalysis-chemistry, the publication is Izvestiya Vysshikh Uchebnykh Zavedenii, Khimiya i Khimicheskaya Tekhnologiya (1960), 876-80, database is CAplus.

Two preparations of alkylphenols from sym. boric esters [trialkyl borates and triphenyl borate(I)] in the presence of AlCl₃, and through a preliminary preparation of mixed boric esters were given. The yields reached 70-98% and the alkylphenols obtained did not contain nonphenolic compounds A mixture of 23 g. tributyl borate, 18.8 g. PhOH, and 0.2 g. PhONa was heated to 200-30¡ã (maintaining the temperature of BuOH below 120-30¡ã) to yield 14.8 g. BuOH [i.e., the theoretical amount, assuming the formation of (PhO)₂BOBu (II)], n²⁰_D 1.4000. To a mixture of 1 g. II in 200 ml. pyridine was added, portionwise, with cooling, 52 g. freshly sublimed AlCl₃. The mixture heated 15-20 min. to 80¡ã and 15 min. at 80-5¡ã, poured into a mixture of ice and HCl, and extracted with Et₂O, and the phenols extracted with 10% NaOH and treated as usual gave 80% mixture of o- and p-butylphenol, b_5.5 92-106¡ã, further fractionated to yield 11.6% o-sec-butylphenol, b_6.5 92.5¡ã, n²⁰_D 1.5228, d₂₀ 0.9876, MR_D 46.42 (o-sec-butylphenoxyacetic acid m. 109.5-110¡ã; the toluide m. 69.5-70.5¡ã) and 81.2% p-sec-butylphenol, b_6.5 105.5¡ã, m. 57-7.5¡ã (petr. ether), n²⁰_D 1.5200, d₂₀ 0.9787, MR_D 46.59 (the toluidide of p-sec-butylphenoxyacetic acid m. 90-1¡ã). In an analogous manner, 58 g. I and 18.8 g. triisopropyl borate dissolved in 150 ml. ligroine and 52 g. AlCl₃ yielded a fraction b₁₀ 99-120¡ã, further fractionated to yield o-isopropylphenol, b_2.5 67-7.5¡ã, n²⁰_D 1.5282, d₂₀ 1.0127, MR_D 41.43. Propyl diphenyl borate was obtained by the simultaneous esterification of 18 g. PrOH and 56.4 g. phenol with 18.6 g. boric acid in 80 ml. toluene in a Dean-Stark apparatus; after distillation of PhCH₃ and the unreacted phenol in vacuo (water-jet pump), 150 ml. ligroine and 52 g. AlCl₃ were added, and the mixture treated as above to yield 73% propylphenol isomers, b₁₀ 103-4¡ã, n²⁰_D 1.5253, d₂₀ 0.9972, MR_D 41.88; the phenoxyacetic acid m. 63-5¡ã; phenylurethan m. 77-85¡ã. A mixture of 76.7 g. triisobutyl borate, 193.4 g. I dissolved in 450 ml. ligroine, and 133.5 g. AlCl₃ was heated 2 hrs. at 35-60¡ã and about 1 hr. at 85-90¡ã, and treated as usual to yield 70% p-tert-butylpbenol, b₅ 99-9.5¡ã, m. 98.5-99¡ã (petr. ether); (the phenoxyacetic acid m. 85.5-86¡ã) and 2 high-boiling fractions of polyalkyl phenols b₅ 120-30¡ã (10.3 g.), and b₅ 150-65¡ã (4 g.). I (58 g.) and 30.8 g. tricyclohexyl borate 100 ml. ligroine heated 30 min. at 90¡ã with 40 g. AlCl₃ yielded 42.2% p-cyclohexylphenol b₁₁ 1.50-3¡ã, m. 127.5-8¡ã (benzene); benzoate derivative m. 114-14.5¡ã (alc.). The nonphenolic part yielded 10.8 g. of a fraction, b₆ 101-3¡ã, n²⁰_D 1.5283, d₂₀ 0.9586, and 6.2 g. of a fraction b₆ 178-80¡ã, n²⁰_D 1.5432. 27 references.

Izvestiya Vysshikh Uchebnykh Zavedenii, Khimiya i Khimicheskaya Tekhnologiya 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 C8H5F3O3, Related Products of catalysis-chemistry.

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

Hu, Bo published the artcileRecovery of palladium from waste ceramic capacitor by liquid-liquid extraction, Synthetic Route of 2016-56-0, the publication is Shigen to Sozai (1993), 109(5), 367-72, database is CAplus.

Pd recovery from multi-layer ceramic chip capacitors was investigated by liquid-liquid extraction method using n-butanol, iso-octane and kerosine as organic phases at various pH levels. Pd was extracted into n-butanol fairly well at pH 1.0-10.5, whereas Ba titanate was not extracted almost entirely under the same conditions. The addition of dodecylammonium acetate (I) as a collector promoted PD recovery in n-butanol. Pd recovery from industrial waste of ceramic capacitors was carried out by adding I to obtain a 96.8% recovery and ?10% yield.

Shigen to Sozai 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, Synthetic Route of 2016-56-0.

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

Al-Awadi, Nouria A. published the artcileKinetics and mechanism of thermal gas-phase elimination of 2-aryloxyacetic acid, Synthetic Route of 1798-04-5, the publication is International Journal of Chemical Kinetics (2001), 33(10), 612-616, database is CAplus.

Rates of thermal gas-phase elimination of eleven 2-aryloxyacetic acid have been measured over a 45¡ãC temperature range for each compound Hammett correlation of the present kinetic data with the literature ¦Ò⁰ values of the given substituents gave a reaction ¦Ñ constant of 0.69 at 600 K; this is more than that for the gas-phase elimination parameter of 2-aryloxypropanoic acid (¦Ñ = 0.26) and consistent with a transition state with some charge separation, suggesting a partial formation of carbocation. The implications of this observation for the thermal gas-phase elimination of ¦Á-aryloxycarboxylic acids are considered.

International Journal of Chemical Kinetics 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, Synthetic Route of 1798-04-5.

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

Huy, Bui The published the artcileControllable synthesis of thiol-capped CdTe nanoparticles for optical sensing of triethylenetetramine dihydrochloride, Application of N1,N1′-(Ethane-1,2-diyl)bis(ethane-1,2-diamine) dihydrochloride, the publication is Journal of Nanoscience and Nanotechnology (2014), 14(10), 7662-7667, database is CAplus and MEDLINE.

Highly luminescent CdTe quantum dots (QDs) were synthesized through a co-precipitation route in aqueous salt solutions using different thiols as stabilizers. The synthetic procedure was simple, efficient, and stable. It could also allow controlling the emission wavelength by varying the exptl. conditions such as reaction time and pH values. The strong luminescence of the QDs was observed under UV-excitation and emission colors could be adjusted. The interaction between CdTe QDs and triethylenetetramine dihydrochloride (TETA) which is a candidate treatment for diabetic cardiovascular complication was investigated by fluorescence spectroscopy. Based on the quenching effect on CdTe photoluminescence intensity by TETA, a simple assay system for analyzing the content of TETA in aqueous samples was developed. The linearity was maintained in the range of 0.2 ¦ÌM to 1.2 ¦ÌM (R² = 0.994) with a limit of detection (LOD; S/N = 3) at 28 nM. The results showed that CdTe QDs capped with diverse thiols has a potential for the quant. anal. of TETA in urine samples.

Journal of Nanoscience and Nanotechnology 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, Application of N1,N1′-(Ethane-1,2-diyl)bis(ethane-1,2-diamine) dihydrochloride.

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

Huang, Chi Yen published the artcileFast-response liquid crystal lens with doping of organic N-benzyl-2-methyl-4-nitroaniline, Name: N-Benzyl-2-methyl-4-nitroaniline, the publication is Optics Express (2020), 28(7), 390001, database is CAplus and MEDLINE.

In this study, a large-aperture hole-patterned liquid crystal (LHLC) lens was prepared from a mixture of nematic liquid crystal (NLC, E7) and organic material (N-benzyl-2-methyl-4-nitroaniline, BNA). The electro-optic properties of doped and undoped samples were measured, compared, and analyzed. The doped sample exhibited a response time that was ~6 times faster than that of the undoped sample because BNA doping decreased the rotational viscosity of the NLC. BNA dopant effectively suppressed the RMS error of LHLC lens addressed at the high voltage. Furthermore, the BNA dopant revealed a considerable absorbance for short wavelengths (< 450 nm), automatically providing the LHLC lens with a blue light filtering function for ophthalmic applications.

Optics Express 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, Name: N-Benzyl-2-methyl-4-nitroaniline.

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

Sharma, Pankaj published the artcileEffect of sulfamic acid on 1,3-dipolar cycloaddition reaction: mechanistic studies and synthesis of 4-aryl-NH-1,2,3-triazoles from nitroolefins, Recommanded Product: 1,2-Dimethoxy-4-(2-nitrovinyl)benzene, the publication is Journal of the Brazilian Chemical Society (2017), 28(4), 589-597, database is CAplus.

A facile and new metal-free 1,3-dipolar cycloaddition reaction for the synthesis of 4-aryl-NH-1,2,3-triazoles, e.g., I from nitroolefins, e.g., 3-nitro-2-phenyl-2H-1-benzopyran and NaN₃ employing NH₂SO₃H has been developed. Sulfamic acid proved to be an efficient additive in this transformation by inhibiting the formation of triaryl benzene. Mechanistic aspects and key intermediates associated with this transformation have also been characterized by online monitoring of the reaction using electrospray ionization tandem mass spectrometry method (ESI-MS/MS). The protocol emphasizes broad substrate scope for many functionalities, simple reaction conditions such as stability to open air, less reaction time, easy work-up, eco-friendly and with good to excellent yields.

Journal of the Brazilian Chemical Society 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 C15H12O6, Recommanded Product: 1,2-Dimethoxy-4-(2-nitrovinyl)benzene.

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