Catalysis-chemistry

Enterling, Detlev published the artcileSubstitution and ring coupling in the cyclotrisilazane system, Formula: C12H10F2Si, the publication is Zeitschrift fuer Naturforschung, Teil B: Anorganische Chemie, Organische Chemie (1978), 33B(5), 527-32, database is CAplus.

Fluorosilanes, chlorodiorganylboranes and chlorotrimethylstannane react with lithiated cyclotrisilazanes with LiF elimination and substitution. Thus, reaction of I with F₃SiCHMeEt gave 85% II. Mixed substituted compounds are obtained by the reaction of lithiofluorosilylcyclotrisilazanes with other fluorosilanes. Reaction of I with 2-chloro-1,3,4,5,6-pentamethylborazine gave III. The reaction of IV with BuLi gave V.

Zeitschrift fuer Naturforschung, Teil B: Anorganische Chemie, Organische Chemie 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

Shuikin, A. N. published the artcileProperties of a reduced promoted fused iron catalyst in the reaction of alcohols and ketones with dimethylamine and hydrogen, Synthetic Route of 28056-87-3, the publication is Neftekhimiya (1991), 31(4), 507-10, database is CAplus.

A fused iron catalyst consisting of Fe₃O₄ (natural or synthetic magnetite):V₂O₅:CuO in 100:5:1.5 mass ratio was highly selective for the gas-phase hydroamination of internal alcs. and alkyl ketones: a selectivity of 74% was observed for the hydroamination of 2-octanone to N,N-dimethyl-N-(2-octyl)amine (I). Catalyst optimization studies are reported for a variety of promoters: the highest (83%) yield of I from 2-octanone was obtained with a catalyst composition of 100 natural Fe₃O₄:10 Al₂O₃:1 CuO. Pressure and temperature are also optimized.

Neftekhimiya published new progress about 28056-87-3. 28056-87-3 belongs to catalysis-chemistry, auxiliary class Amine,Aliphatic hydrocarbon chain, name is 2-Ethyl-N,N-dimethylhexan-1-amine, and the molecular formula is C26H41N5O7S, Synthetic Route of 28056-87-3.

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

Elstner, R. published the artcileStudies on the effect of inhibitors in ammonia etching solutions on the depth and pattern in copper etching, Product Details of C3H8N2S, the publication is Metalloberflaeche (1982), 36(10), 468-78, database is CAplus.

The effects of inhibitors on the etching of Cu for printed circuits by ammoniacal solutions of Na chlorite and CuCl₂ were studied. The etch rates and elec. conductivity of the different solutions are given. The effects of Cu(I) ions are discussed. The optimum etching conditions are described.

Metalloberflaeche published new progress about 6972-05-0. 6972-05-0 belongs to catalysis-chemistry, auxiliary class Thiourea,Amine,Aliphatic hydrocarbon chain,Amide, name is 1,1-Dimethylthiourea, and the molecular formula is C3H8N2S, Product Details of C3H8N2S.

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

Lunn, George published the artcileRemoval of biological stains from aqueous solution using a flow-through decontamination procedure, Safety of 5,9-Diaminobenzo[a]phenoxazin-7-ium acetate, the publication is Biotechnic & Histochemistry (1994), 69(1), 45-54, database is CAplus and MEDLINE.

Chromatog. columns filled with Amberlite XAD-16 were used to decontaminate, using a continuous flow-through procedure, aqueous solutions of the following biol. stains: acridine orange, alcian blue 8GX, alizarin red S, azure A, azure B, brilliant blue G, brilliant blue R, Congo red, cresyl violet acetate, crystal violet, eosin B, eosin Y, erythrosin B, ethidium bromide, Giemsa stain, Janus green B, methylene blue, neutral red, nigrosin, orcein, propidium iodide, rose Bengal, safranine O, toluidine blue O, and trypan blue. Adsorption was most efficient for stains of lower mol. weight (< 600). Adsorption of stain increased as the flow rate decreased; column diameter had little effect on adsorption. Adsorption of stain was greatest when finely ground resin was used, but if the resin particles were too small, column clogging occurred. Limited grinding of the resin gave increased adsorption while retaining good flow characteristics. Amberlite XAD-16 saturated with methylene blue was regenerated to its initial adsorption capacity by passing methanol through the column. The technique described provides an economical, rapid means of removing stains from aqueous solution

Biotechnic & Histochemistry published new progress about 10510-54-0. 10510-54-0 belongs to catalysis-chemistry, auxiliary class Other Aromatic Heterocyclic,Salt,Amine,Inhibitor,Inhibitor, name is 5,9-Diaminobenzo[a]phenoxazin-7-ium acetate, and the molecular formula is C18H15N3O3, Safety of 5,9-Diaminobenzo[a]phenoxazin-7-ium acetate.

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

Watkins, John B. published the artcileCholeretic effect of structural analogs of valproic acid in the rat, Product Details of C10H20O2, the publication is Research Communications in Chemical Pathology and Pharmacology (1983), 39(3), 355-66, database is CAplus and MEDLINE.

A comparison of structure-choleretic activity relationship were made for several branched- and straight-chain carboxylic acids including valproic?acid??[99-66-1]. Cumulative bile flow was 13.8, 23.8, 29.4 and 14.9 mL/4h/kg for dimethyl- [79-31-2], diethyl- [88-09-5], dipropyl- (valproic acid), and dibutylacetic?acid??[3115-28-4], resp., after i.v. administration of approx. equimolar doses (1100 ¦Ìmoles/kg). Except for dibutylacetic acid, maximal bile flow increased from control rates of 50-60 to 120-140 ¦ÌL/min/kg. Administration of higher doses of 2,2-dimethylbutanoic?acid??[595-37-9] and 2-ethylbutanoic acid did not increase maximal bile flow above 125-140 ¦ÌL/min/kg but did prolong the duration of choleresis. Maximal and cumulative bile flows increased with length of carboxylic acid chain for 2,2-di-Me substituted acids (2,2-dimethylacetic?acid??[79-31-2] to 2,2-dimethylbutanoic acid). If the 2 Me groups were on C-3 (3-methylbutanoic?acid??[503-74-2]), no change in bile flow was observed Straight-chain acids from C-5 to C-11 and pent-4-enoic acid did not alter bile flow. Thus, the effectiveness of several branched-chain carboxylic acids as choleretics parallel their ability as anticonvulsants. In contrast, the straight-chain acids which cause central nervous system depression have no choleretic activity.

Research Communications in Chemical Pathology and Pharmacology published new progress about 3115-28-4. 3115-28-4 belongs to catalysis-chemistry, auxiliary class Aliphatic Chain, name is 2-Butylhexanoic acid, and the molecular formula is C10H11NO4, Product Details of C10H20O2.

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

Hirasawa, Shigeo published the artcileFacile and Efficient Chemoenzymatic Semisynthesis of Fc-Fusion Compounds for Half-Life Extension of Pharmaceutical Components, HPLC of Formula: 1395786-30-7, the publication is Bioconjugate Chemistry (2019), 30(9), 2323-2331, database is CAplus and MEDLINE.

The formation of Fc-fusions, in which biol. active mols. and the Fc fragment of antibodies are linked to each other, is one of the most efficient and successful half-life extension technologies to be developed and applied to peptide and protein pharmaceuticals thus far. Fc-fusion compounds are generally produced by recombinant methods. However, these cannot be applied to artificial middle mols., such as peptides with non-natural amino acids, unnatural cyclic peptides, or pharmaceutical oligonucleotides. Here, we developed a simple, efficient, semisynthetic method for Fc-fusion production involving our previously developed enzymic N-terminal extension reaction (i.e., NEXT-A reaction) and strain-promoted azide-alkyne cycloaddition, achieving quant. conversion and high selectivity for the N-terminus of the Fc protein. An Fc-fusion compound prepared by this method showed comparable biol. activity to that of the original peptide and a long-circulating plasma half-life. Thus, the proposed method is potentially applicable for the conjugation of a wide range of pharmaceutical components.

Bioconjugate Chemistry published new progress about 1395786-30-7. 1395786-30-7 belongs to catalysis-chemistry, auxiliary class Inhibitor, name is Dbco-maleimide, and the molecular formula is C25H21N3O4, HPLC of Formula: 1395786-30-7.

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

Braun, J. V. published the artcileSyntheses in the aliphatic-aromatic series. XII, COA of Formula: C11H14O2, the publication is Berichte der Deutschen Chemischen Gesellschaft (1914), 262-9, database is CAplus.

cf. C. A., 7, 2567. The following compounds were prepared to determine whether the introduction of a Me group in the CH₂ adjacent to CH₂OH or CHO in the side chain of aliphatic-aromatic alcs. and aldehydes has in general a greater influence on the odor than when it is introduced nearer to the aromatic radical, as was found in the case of PhCH₂CH₂CH₃OH and PhCH₂CH₃CHO: It was found that the methylation does change the odor but at the same time it weakens it so extraordinarily that shades cannot be distinguished. Diethyl phenethylmethylmalonate, in 77% yield from Ph(CH₂)₂CH(CO₂Et)₂ and MeI, b₂₀ 192¡ã, hydrolyzed by aqueous alc. KOH to the acid, m. 160¡ã, which at 165¡ã, gives ¦Á-methyl-¦Ã-phenylbutyric acid, b₁₉ 180¡ã (different from Willgerodt and Merck’s compound (C. A., 4,903)); its ethyl ester, b₁₇ 143-4¡ã, with Na and alc. gives 60% of ¦Â-methyl-¦Ã-phenylbutyl alcohol, viscous oil, b₁₈ 145-8¡ã, d₄²⁰ 0.9719, has a faint odor somewhat more pleasant than that of Ph(CH₂)₄OH.Di-ethyl ¦Ä-phenylpropylmethylmalonate, in 80% yield from Ph(CH₂)₂CH(CO₂Et)₂, b₁₈, 194¡ã; with 2 mols. of hot aqueous alc.KOH, even after 2.5. hrs., it gives chiefly the monoethyl ester, oil which loses CO₂ on distillation, with formation of ethyl ¦Á-methyl-¦Ä-phenyl. valerate, b₁₇ 158¡ã, hydrolyzed by alks. to the acid, b₁₉, 190¡ã, and reduced by Na and alc. to ¦Â-methyl-l¦Ä-phenylamyl alcohol, b₂₀ 159-60¡ã, d₄²⁰ 0.9642, has an odor much fainter but similar to that of Ph(CH₂)₄OH. Its chloride, obtained by heating the alc. with 2 parts fuming HCl at 120¡ã b₁₂ 140-2¡ã, has not as pleasant an odor as that of Ph(CH₂)₂₁Cl, gives quant. with NaI the iodide, b₂₀ 160-6¡ã, which with AgNO₂ gives approx. equal amounts of nitrite, b₁₆, about 130¡ã, and of nitro compound, yellow, b. 172-8¡ã; when the latter is reduced with SnCl₂ and the resulting oxime is b. 0.5 hr. with 15 % H₂SO₄ there is obtained ¦Á-methyl-¦Ä-phenylvaleraldehyde, b₂₁ 148-52¡ã (50% yield); its odor is much fainter and not so characteristically lemon-like as that of Ph(CH₂)₄CHO. Diethyl ¦Ã-phenylisobutylmalonate, in 80% yield from CH₂(CO₂Et)₂ and PhCH₂CHMeCH₂Br, b₁₁ 189¡ã, gives 80% of diethyl phenylisobutylmethylmalonate, b₁₂ 192-4¡ã. Free acid, oil, gives phenylisobutylmethylacetic acid, b. 282-4¡ã; ethyl ester, b₂₅ 154¡ã. ¦Â,¦Ã-Dimethyl- ¦Ò-phenylamyl alcohol (55-60% yield), b₁₇ 156-8¡ã, d₄²⁰ 0.9549, has a fainter odor even than the ¦Â-monomethyl compound Chloride, b₂₀ 146-8¡ã, has an even less pleasant odor than the mono-Me compound Iodide, b₂₀ 163-6¡ã. Nitro compound, b₂₀ 176-81¡ã. ¦Á,¦Ã-Di- methyl-¦Ä-valeraldehyde, b₂₀ 151-6¡ã.

Berichte der Deutschen Chemischen Gesellschaft published new progress about 1949-41-3. 1949-41-3 belongs to catalysis-chemistry, auxiliary class Carboxylic acid,Benzene, name is 2-Methyl-4-phenylbutanoic acid, and the molecular formula is C11H14O2, COA of Formula: C11H14O2.

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

Kirillova, Marina V. published the artcileMild, single-pot hydrocarboxylation of linear C₅-C₉ alkanes into branched monocarboxylic C₆-C₁₀ acids in copper-catalyzed aqueous systems, Related Products of catalysis-chemistry, the publication is Applied Catalysis, A: General (2011), 401(1-2), 106-113, database is CAplus.

A single-pot method has been developed for the hydrocarboxylation of the liquid C₅-C₉ alkanes (n-pentane, n-hexane, n-heptane, n-octane, n-nonane and 3-methylhexane) into the branched monocarboxylic C₆-C₁₀ acids bearing one more carbon atom. This method is characterized by a direct, selective and low-temperature (60 ¡ãC) hydrocarboxylation reaction of the alkane with carbon monoxide, water (which acts as a reagent besides being a solvent component) and potassium peroxodisulfate, in H₂O/MeCN medium. The hydrocarboxylations are markedly enhanced in the presence of a tetracopper(II) triethanolaminate complex as a homogeneous catalyst precursor. Total yields (based on alkane) of carboxylic acids up to 46% (with 97-99% overall selectivity) have been achieved, which are remarkable in the field of alkane functionalization under mild conditions, especially for a C-C bond formation reaction in aqueous acid-solvent-free medium. The regio- and bond selectivity parameters have been determined and a free radical mechanism has been proposed.

Applied Catalysis, A: General published new progress about 3115-28-4. 3115-28-4 belongs to catalysis-chemistry, auxiliary class Aliphatic Chain, name is 2-Butylhexanoic acid, and the molecular formula is C10H20O2, Related Products of catalysis-chemistry.

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

Kirillova, Marina V. published the artcileTopologically Unique Heterometallic Cu^II/Li Coordination Polymers Self-Assembled from N,N-bis(2-Hydroxyethyl)-2-aminoethanesulfonic Acid Biobuffer: Versatile Catalyst Precursors for Mild Hydrocarboxylation of Alkanes to Carboxylic Acids, Application of 2-Butylhexanoic acid, the publication is Inorganic Chemistry (2012), 51(9), 5224-5234, database is CAplus and MEDLINE.

The facile aqueous medium reactions of Cu(II) nitrate with BES biobuffer [(HOCH₂CH₂)₂N(CH₂CH₂SO₃H), hereinafter referred as H₃bes] in the presence of various benzenecarboxylic acids [benzoic (Hba), 3-hydroxybenzoic (Hhba), and 3,5-dihydroxybenzoic (Hdhba) acid] and LiOH gave rise to the self-assembly generation of three new heterometallic Cu^II/Li materials, [Li(H₂O)₄][Cu₄(¦Ì₂-Hbes)₄(¦Ì₂-ba)]¡¤H₂O (1) and [Cu₄(¦Ì₃-Hbes)₄(L){Li(H₂O)₂}]_n¡¤3nH₂O {L = ¦Ì₂-hba (2) and ¦Ì₂-dhba (3)}. They were isolated as air-stable crystalline solids and fully characterized by IR and UV-visible spectroscopy and electrospray ionization (ESI)-MS(¡À), elemental, thermal, and single-crystal x-ray diffraction analyses. The latter revealed that 1–3 have comparable packing patterns and unit cell parameters, being composed of similar [Cu₄(¦Ì-Hbes)₄(¦Ì-carboxylate)]^– cores and [Li(H₂O)₄]⁺ cations (in 1) or [¦Ì-Li(H₂O)₂]⁺ groups (in 2 and 3), which are arranged into discrete 0-dimensional aggregates in 1 or infinite 3-dimensional noninterpenetrating metal-organic networks in 2 and 3. The topol. anal. of the coordination polymers 2 and 3 disclosed the trinodal 3,3,4-connected underlying nets with an unprecedented topol. defined by the point symbol of (4.6.8)₄(4².6)₂(6².16².18²), further simplification of which resulted in the binodal 4,4-connected nets with the pts (PtS) topol. Apart from representing very rare examples of coordination compounds derived from H₃bes, 1–3 feature solubility in H₂O and were applied as efficient and versatile catalyst precursors for the mild (60¡ã) single-pot hydrocarboxylation, by CO and H₂O, of various gaseous, linear, and cyclic C_n (n = 2-9) alkanes into the corresponding C_n+1 carboxylic acids, in H₂O/MeCN medium under homogeneous conditions and in the presence of K peroxodisulfate. Total yields (based on alkane) of carboxylic acids up to 78% were achieved, which are remarkable in the field of alkane functionalization under mild conditions, especially for a C-C bond formation reaction in aqueous acid-solvent-free medium.

Inorganic Chemistry published new progress about 3115-28-4. 3115-28-4 belongs to catalysis-chemistry, auxiliary class Aliphatic Chain, name is 2-Butylhexanoic acid, and the molecular formula is C10H20O2, Application of 2-Butylhexanoic acid.

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

Babadzhanova, Lesya A. published the artcileThe synthesis of salts and esters of perfluorinated dithio- and thiocarboxylic acids from carbon disulfide and carbonyl sulfide reacting with R_FSiMe₃/F^–, Application In Synthesis of 1206-46-8, the publication is Journal of Fluorine Chemistry (2004), 125(7), 1095-1098, database is CAplus.

Trimethyl(perfluoroalkyl)silanes react with carbonyl sulfide and carbon disulfide in the presence of fluoride ion to give salts and, after alkylation of the latter, esters of the corresponding perfluorinated thio- and dithiocarboxylic acids. Thus, reaction of Me₃SiCF₃ with [Me₄N]F and CS₂ in monoglyme at -60¡ã gave 98% tetramethylammonium trifluorodithioacetate which on alkylation with BuI in MeCN gave 95% Bu trifluorodithioacetate.

Journal of Fluorine Chemistry 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, Application In Synthesis of 1206-46-8.

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