Tag: M.W=200-250

Liu, Bing published the artcileBeneficiation technology study and industrial practice of high-mud sulfide-oxide Pb-Zn ore, Formula: C14H31NO2, the publication is Kuangye (Beijing, China) (2017), 26(1), 32-37, database is CAplus.

The beneficiation technol. study on a high-mud sulfide-oxide Pb-Zn ore in the Lanping area, Yunnan is presented in this paper. Based on the process mineralogy study and considering difficulties associated with conventional processing methods, a combination process of gravity-concentration-and floatation, which includes predesliming, recovering of zinc oxide from muddy by gravity concentration, lead and zinc sulfides floatation followed by oxides flotation, was determined The study used a centrifuge to recover zinc oxide effectively, and the new combined collectors improved the floatability of zinc oxide in flotation processes. The full set of technol. was successfully applied to the mine production, and achieved excellent industrial production indexes.

Kuangye (Beijing, China) 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, Formula: C14H31NO2.

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

Koch, Alexander published the artcileHydrocarbon-soluble bis(trimethylsilylmethyl)calcium and calcium-iodine exchange reactions at sp²-hybridized carbon atoms, SDS of cas: 1206-46-8, the publication is Organometallics (2017), 36(20), 3981-3986, database is CAplus.

Hydrocarbon-soluble and highly reactive [(L)_xCa(CH₂SiMe₃)₂] (2a, L = tetrahydropyran, x = 4; 2b,L = tmeda, x = 2) are synthesized by the metathesis reaction of Me₃SiCH₂CaI (1-I) with KCH₂SiMe₃. The stability of 2a in tetrahydropyran solution at 0¡ã is sufficiently high for subsequent chem. transformations. The reaction of ICH₂SiMe₃ with calcium in di-Et ether yields unique iodide-bridged cage compound [Ca₃(¦Ì₃-I)(¦Ì-I)₃(¦Ì₃-OEt)(CH₂SiMe₃)(OEt₂)₅] (3). We demonstrate that alkylcalcium complexes are valuable reagents for calcium-iodine exchange reactions at C_sp2-I functionalities.

Organometallics 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, SDS of cas: 1206-46-8.

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

Wu, T. C. published the artcileAddition of silylmetallic compounds to olefins, COA of Formula: C12H10F2Si, the publication is Journal of Organic Chemistry (1960), 596-8, database is CAplus.

Ph₃SiK (I) and Ph₃SiLi (II) added to the olefinic linkage of 1,1-diphenylethylene (III) and of triphenylethylene (IV). No addition occurred, under corresponding conditions, to tetraphenylethylene (V) and to a variety of aliphatic and alicyclic olefins. For comparison purposes, triphenyl(1,1-diphenylethyl)silane (VI) and triphenyl(1,1,2-triphenylethyl)silane (VII) were synthesized by metalation of triphenyl(diphenylmethyl)silane (VIII) with BuLi and subsequent treatment with Me₂SO₄ and PhCH₂Cl (IX), resp. I suspension (from cleavage of 0.01 mole hexaphenyldisilane) left 2 hrs. with 3.6 g. III in 20 ml. Et₂O, the mixture hydrolyzed, the solution dried, and Et₂O evaporated gave 3.5 g. triphenyl(2,2-diphenylethyl)silane (X), lustrous plates, m. 106-8¡ã (alc.). II (0.0122 mole) in tetrahydrofuran (THF) added to 2.2 g. III, the mixture stirred 0.5 hr. at room temperature, then hydrolyzed, the organic layer evaporated, and the residue recrystallized gave 80% X. Ph₂CHCH₂Cl (4.3 g.) in 20 ml. Et₂O added during 2 min. to an amalgamated suspension of 0.02 mole I, the mixture left 2 hrs., hydrolyzed, and the product isolated gave 1.1 g. hexaphenyldisilane. The Et₂O solution on evaporation gave 4.1 g. X. PhLi (0.002 mole) in THF added to 0.5 g. triphenyl-¦Â-styrylsilane, stirred 2 hrs. at room temperature, the mixture hydrolyzed, Et₂O added, the solvent removed, and the residue chromatographed on Al₂O₃ gave 0.18 g. Ph₄Si. No other product was isolated from the mother liquor. BuLi (0.015 mole) added at once to 5 g. VIII in 25 ml. THF, the solution stirred 40 min. at room temperature, excess Me₂SO₄ added, then hydrolyzed, and the product separated gave 58% VI, m. 193-5¡ã (C₆H₆-alc.). II (0.020 mole) in THF added to 5.12 g. IV, the mixture stirred 1 hr. at room temperature, hydrolyzed, and the organic layer worked up as usual gave 6.4 g. 1,2,2-isomer of VII, m. 171-2¡ã (C₆H₆-alc.). BuLi (0.015 mole) added to 5 g. VIII in 25 ml. THF, stirred 40 min. at room temperature, excess IX added, the mixture hydrolyzed, and worked up gave 1.5 g. VII, m. 198-200¡ã (C₆H₆-alc.). II (0.015 mole) in THF stirred 6 hrs. at room temperature with 5 g. V, then 1 hr. at 50¡ã, hydrolyzed with dilute acid, and the organic portion worked up gave 4.2 g. V, m. 222-4¡ã; the filtrate chromatographed gave 2.2 g. Ph₃SiH, m. 43-5¡ã (MeOH). Attempted reactions of I with other olefins were carried out by mixing a suspension of I with an equimolar amount of the olefinic compound; the mixture stirred a certain time, H₂O added, the organic layer dried, evaporated, and the residue crystallized gave triphenylsilanol (XI) as chief product. In 2 experiments with 1,2-dimethoxyethane as the solvent, a mixture of V and hexaphenyldisiloxane was also obtained. In the reaction of 9,9′-bifluorene with I in Et₂O, heat was evolved and the mixture became dark. The workup gave a tarlike material from which little pure product could be isolated. The following results were obtained with I (olefin, reaction time in hrs., % yield of XI, and other products isolated given): 1-octene, 96, 63, -; 1-octene, 48, 25, 24% Ph₄Si, 22% (R₃Si)₂O (XII); 1-dodecene, 72, 78, -; 1-dodecene, 48, 21, 36% R₄Si, 20% XII; 1-hexadecene, 24, 86, -; 1-octadecene, 24, 89, -; cyclohexene, 48, 87, -; cyclohexene, 48, 66, -; 1-methylcyclopentene, 48, 72, -; 1,1-diphenylethylene, 2, -, 42% adduct; V, 48, 74, 70% R₂C:CR₂; V, 3, 52, 74% R₂C:CR₂; 1,4-diphenyl-1,3-butadiene, 5, 42, 12% (R₃Si)₂; 9,9′-bifluorene, 3, -, tar.

Journal of Organic Chemistry 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 C3H5F3O, COA of Formula: C12H10F2Si.

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

Le Vaillant, Franck published the artcileRoom temperature decarboxylative cyanation of carboxylic acids using photoredox catalysis and cyanobenziodoxolones: a divergent mechanism compared to alkynylation, Synthetic Route of 1798-04-5, the publication is Chemical Science (2017), 8(3), 1790-1800, database is CAplus and MEDLINE.

The one-step conversion of aliphatic carboxylic acids to the corresponding nitriles was accomplished via the merger of visible light mediated photoredox and s (CBX) reagents. The reaction proceeded in high yields with natural and non-natural ¦Á-amino and ¦Á-oxy acids, affording a broad scope of nitriles with excellent tolerance of the substituents in the ¦Á position. The direct cyanation of dipeptides and drug precursors was also achieved. The mechanism of the decarboxylative cyanation was investigated both computationally and exptl. and compared with the previously developed alkynylation reaction. Alkynylation was found to favor direct radical addition, whereas further oxidation by CBX to a carbocation and cyanide addition appeared more favorable for cyanation. A concerted mechanism was proposed for the reaction of radicals with EBX reagents, in contrast to the usually assumed addition elimination process.

Chemical Science 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

Bustamante, Heriberto published the artcileInteraction of dodecylamine and sodium dodecyl sulfate with a low-rank bituminous coal, Formula: C14H31NO2, the publication is Colloids and Surfaces (1984), 12(3-4), 381-99, database is CAplus.

The electrokinetic behavior of a low-rank bituminous coal (Great Northern coal), its carbonaceous matter, and its mineral matter (mainly kaolinite) have been studied. The major contributor to the neg. zeta potential of the coal was the mineral matter, especially at pH <6.0. Flotation tests showed that dodecylammonium cations adsorbed on nonpolar carbonaceous matter decreasing its hydrophobicity, indicating that the mol. orientation of the cations was reversed. On weathered coal, in which both the carbonaceous and the mineral matter were extensively neg. charged, dodecylammonium was adsorbed with the polar group interacting with the surface; therefore, all types of composite grains became hydrophobic. Adsorption of Na?dodecyl?sulfate??[151-21-3] on Great Northern coal was almost an order of magnitude lower than that of dodecylammonium?acetate??[2016-56-0] under all conditions.

Colloids and Surfaces 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, Formula: C14H31NO2.

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

Tangdenpaisal, Kassrin published the artcileDesigning New Analogs for Streamlining the Structure of Cytotoxic Lamellarin Natural Products, Application of 2-(3-(Benzyloxy)phenyl)acetic acid, the publication is Chemistry – An Asian Journal (2015), 10(4), 925-937, database is CAplus and MEDLINE.

Despite the therapeutic potential of marine-derived lamellarin natural products, their preclin. development has been hampered by their lipophilic nature, causing very poor aqueous solubility In order to develop more drug-like analogs, their structure was streamlined in this study from both the cytotoxic activity and lipophilicity standpoints. First, a modified total synthetic route was successfully devised to construct a library of 59 systematically designed lamellarin analogs, which were then subjected to cytotoxicity and log P determinations [e.g., I with single or double bond as indicated by dotted line; R = H, Me; X = H, OH; Y = H, OMe; A, B = H, OH]. Along with the 25 first-generation lamellarins previously synthesized in our laboratory, the structure-activity and structure-lipophilicity relationships were extensively evaluated. Our results clearly indicated the addnl. structural requirements around the lamellarin skeleton which, when combined with those reported previously, can provide invaluable guidance for further modifications to increase the aqueous solubility of these compounds

Chemistry – An Asian Journal 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 C17H14O5, Application of 2-(3-(Benzyloxy)phenyl)acetic acid.

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

Tangdenpaisal, Kassrin published the artcileDesigning New Analogs for Streamlining the Structure of Cytotoxic Lamellarin Natural Products, Synthetic Route of 4230-93-7, the publication is Chemistry – An Asian Journal (2015), 10(4), 925-937, database is CAplus and MEDLINE.

Despite the therapeutic potential of marine-derived lamellarin natural products, their preclin. development has been hampered by their lipophilic nature, causing very poor aqueous solubility In order to develop more drug-like analogs, their structure was streamlined in this study from both the cytotoxic activity and lipophilicity standpoints. First, a modified total synthetic route was successfully devised to construct a library of 59 systematically designed lamellarin analogs, which were then subjected to cytotoxicity and log P determinations [e.g., I with single or double bond as indicated by dotted line; R = H, Me; X = H, OH; Y = H, OMe; A, B = H, OH]. Along with the 25 first-generation lamellarins previously synthesized in our laboratory, the structure-activity and structure-lipophilicity relationships were extensively evaluated. Our results clearly indicated the addnl. structural requirements around the lamellarin skeleton which, when combined with those reported previously, can provide invaluable guidance for further modifications to increase the aqueous solubility of these compounds

Chemistry – An Asian 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 C15H10O2, Synthetic Route of 4230-93-7.

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

Liu, Yongan published the artcileTrifluoromethylfluorosulfonylation of Unactivated Alkenes Using Readily Available Ag(O₂CCF₂SO₂F) and N-fluorobenzenesulfonimide, Recommanded Product: Allyldiphenylphosphine oxide, the publication is Angewandte Chemie, International Edition (2017), 56(48), 15432-15435, database is CAplus and MEDLINE.

Presented is a novel intermol. radical trifluoromethylfluorosulfonylation of unactivated alkenes under mild reaction conditions with good functional-group tolerance in the most atom-economic manner by using readily available Ag(O₂CCF₂SO₂F) and N-fluorobenzenesulfonimide (NFSI). Both the trifluoromethyl and sulfonyl groups in the products originate from Ag(O₂CCF₂SO₂F).

Angewandte Chemie, International Edition 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 C15H15OP, Recommanded Product: Allyldiphenylphosphine oxide.

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

Xu, Longhua published the artcileFlotation and adsorption of mixed cationic/anionic collectors on muscovite mica, Related Products of catalysis-chemistry, the publication is Minerals Engineering (2013), 41-45, database is CAplus.

The adsorption of dodecylamine acetate (DAA), sodium oleate (NaOL) and DAA-NaOL mixtures on muscovite mica were investigated through flotation tests, zeta potential measurements, and pyrene fluorescence tests. The results show that the muscovite mica has a neg. charge over the pH range 2-12. The muscovite mica did not float in the presence of NaOL alone. However, the recovery of muscovite mica ranged from ca. 80% (at pH 2) to 50% (at pH 11) using DDA alone. In the presence of mixed DAA-NaOL, recovery ranged from ca. 80% (at pH 2) to 90% (at pH 11). The individual cationic collectors DAA can be adsorbed strongly onto the muscovite mica, but no significant adsorption of anionic collectors NaOL can be detected by zeta potential measurements. In the mixed systems, the adsorption of both the cationic and anionic collectors are enhanced due to co-adsorption. The presence of NaOL in the mixture decreases the electrostatic head-head repulsion between the surface and ammonium ions and increases the lateral tail-tail hydrophobic bonds. Mol. dynamics (MD) simulations were conducted to further investigate the adsorption of DDA, NaOL, and DAA-NaOL on the (0 0 1) basal planes of muscovite using Materials Studio 5.0 program. The conclusions drawn from theor. computations are in good agreement with exptl. results.

Minerals Engineering 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 C17H20ClN3, Related Products of catalysis-chemistry.

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

Chen, Weibin published the artcileEthers of 3-hydroxyphenylacetic acid as selective gamma-hydroxybutyric acid receptor ligands, Application In Synthesis of 1860-58-8, the publication is Bioorganic & Medicinal Chemistry Letters (2005), 15(13), 3201-3202, database is CAplus and MEDLINE.

Gamma-hydroxybutyric acid (GHB) is a drug of abuse, a therapeutic, and purportedly a neurotransmitter with a complex mechanism of action in vivo due to direct actions at GABA_B as well as GHB receptors and because of its metabolism to GABA. Herein, the authors describe 3-ethers of 3-hydroxyphenylacetic acid, which have relatively high affinity at GHB sites, no significant affinity at GABA receptors, and would not be expected to be rapidly metabolized to GABAergic ligands. The selectivity of these compounds (UMB108, UMB109, and UMB119) could prove to be useful for studying the biol. of GHB receptors, free from GABAergic effects.

Bioorganic & Medicinal Chemistry 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, Application In Synthesis of 1860-58-8.

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