Catalysis-chemistry

Asano, Michizo published the artcileThe fate of branched-chain fatty acids in the animal body. I. A contribution to the problem of Hildebrandt acid, Recommanded Product: 2-Butylhexanoic acid, the publication is Yakugaku Zasshi (1948), 147-9, database is CAplus.

cf. C.A. 44, 2626g; following abstract From rabbits administered with branched-chain fatty acids 48 hrs.’ urine was collected. 8.5 g. of l-rhodinic acid (b₉ = 139-140¡ã, [¦Á]¹⁵_D = -6.44¡ã, n²⁶_D = 1.4578) resulted in excretion of 3.45 g. of an acid (I), b_0.2 = 174-186¡ã, m.p. = 102-103.5¡ã, (from water), [¦Á]_D = -13.5¡ã, and 45.05% of COOH calculated for C₁₀H₁₆O₄. From 10 g. of administered d-citronellic acid (b₁₁ = 141-3¡ã, [¦Á]_D = +6.31¡ã) there was obtained 6.07 g. of a viscous liquid (II), b_1.2 = 165-190¡ã, m.p. = 103-4¡ã [¦Á]_D = +15.6¡ã, and 45.03% of COOH calculated for C₁₀H₁₆O₄. From 11 g. of d-citronellal (b₁₇ = 97¡ã, [¦Á]_D = -3.64¡ã, n¹³_D = 1.4518), 2.33 g. of an acid (III) was isolated, showing b_0.05 = 160-180¡ã, m.p. = 103-4¡ã, and [¦Á]_D = +15.3¡ã. From 22 g. of geraniol (b₁₇ = 120-2¡ã, n¹³_D = 1.4755, [¦Á]_D = -2.89¡ã), 5 g. of a viscous liquid (IV), b_1.5 = 170-95¡ã, was obtained, and further fractionated into two parts: water-insoluble part (V), crystallized from alc., which showed m.p. = 190-1¡ã; water-insoluble part, m.p. = 102-4¡ã, [¦Á]_D = +14.1¡ã, and 44.89% of COOH calculated for C₁₀H₁₆O₄. By mixed m.p. determinations, it was proved that V was Hildebrandt acid, while II, III, and IV were identical with dihydro-Hildebrandt acid, and I corresponded to the latter’s optical antipode.

Yakugaku Zasshi 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, Recommanded Product: 2-Butylhexanoic acid.

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

Akiya, Shichiro published the artcileThe fate of branched-chain fat acids in animal body. III. Relation between optical activity and chemical change in vivo of aliphatic substances with branched chain, Product Details of C10H20O2, the publication is Yakugaku Zasshi (1950), 477-80, database is CAplus.

cf. preceding abstract 2-Methylcaprylic acid, 3-methylpelargonic acid, 2-ethylcapronic acid, 2-ethylhexanol (I), 3-ethylenanthic acid, dibutylacetic acid, and dipropylpropionic acid were given to rabbits. In all cases, except I which was recovered as carboxylic acid, they were excreted in urine as monocarboxylic acids without change and dicarboxylic acids excreted after ¦Ø-oxidation. In either case, [¦Á]_D showed dextro rotation, though the values were not large. No evidence was obtained as to the assumption that biol. oxidation, especially ¦Ø-oxidation, is asymmetric.

Yakugaku Zasshi 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, Product Details of C10H20O2.

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

Kitani, Akira published the artcileElectrochemical reduction of carbon dioxide reduction in aqueous solution, Formula: C17H37NO3, the publication is Denki Kagaku oyobi Kogyo Butsuri Kagaku (1978), 46(10), 570-2, database is CAplus.

The current efficiency of carboxylic acids, especially that of nonvolatile ones, was examined on the electrolytic reduction of CO₂ on a Pb-Hg electrode at a controlled potential of -1.9 V vs. SCE in an aqueous solution containing Bu₄NHCO₃ as a supporting electrolyte. Although the formation of ?10 carboxylic acids with 2-5 C atoms was confirmed beside HCO₂H, the current efficiencies for them were low. The increase in a hydrophobic region on an electrode surface, either by the addition of a cationic surfactant to an electrolytic solution in a concentration above the critical micelle concentration or by the utilization of a Cu electrode with adsorbed octylmercaptan instead of a Pb-Hg electrode, resulted in the inhibition of the formation of carboxylic acids with 2-3 C atoms and in the acceleration of the formation of nonvolatile ones, although the current efficiency for the total non-volatile acids was somewhat lowered.

Denki Kagaku oyobi Kogyo Butsuri Kagaku published new progress about 17351-62-1. 17351-62-1 belongs to catalysis-chemistry, auxiliary class Salt,Amine, name is Tetrabutylammonium hydrogencarbonate, and the molecular formula is C17H37NO3, Formula: C17H37NO3.

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

Matsushima, Masashi published the artcileInhibition of enteropeptidase by antitrypsin drugs, Safety of 2-(4-((4-Guanidinobenzoyl)oxy)phenyl)acetic acid methanesulfonic acid salt, the publication is Biomedical Research (2001), 22(5), 257-260, database is CAplus.

We have investigated the inhibitory effects on porcine enteropeptidase of some typical synthetic amidino- and guanidino-compounds developed as antitrypsin drugs. The results indicated that enteropeptidase is inhibited by these compounds almost as strongly as trypsin; their IC₅₀ values were in the range of 0.008-4 ¦ÌM, which were much lower than that of the well-known trypsin/enteropeptidase inhibitor benzamidine.

Biomedical Research published new progress about 71079-09-9. 71079-09-9 belongs to catalysis-chemistry, auxiliary class Salt,Carboxylic acid,Carbamidine,Amine,Benzene,Ester,Protease,Ser/Thr Protease, name is 2-(4-((4-Guanidinobenzoyl)oxy)phenyl)acetic acid methanesulfonic acid salt, and the molecular formula is C17H19N3O7S, Safety of 2-(4-((4-Guanidinobenzoyl)oxy)phenyl)acetic acid methanesulfonic acid salt.

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

Inouye, Yoshinobu published the artcileConformation of (S,S)-methyl (2-methyl-4-phenylbutanamido)(phenyl)acetate, Safety of 2-Methyl-4-phenylbutanoic acid, the publication is Acta Crystallographica, Section C: Crystal Structure Communications (1997), C53(10), x, database is CAplus.

Crystals of the title compound are monoclinic, space group C2, with a 22.874(6), b 5.1010(10), c 18.261(4) ?, ¦Â 122.870(10)¡ã; Z = 4, d_c = 1.208; R = 0.047, R_w(F²) = 0.111 for 2876 reflections. The planes of the amide group and the ester group in the Me phenylglycinate (PGME) moiety make an angle of 34.9(1)¡ã. The benzene ring on PGME faces to the Me group of (S)-2-methyl-4-phenylbutanoic acid.

Acta Crystallographica, Section C: Crystal Structure Communications 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, Safety of 2-Methyl-4-phenylbutanoic acid.

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

Zhang, Dejiang published the artcilePd-Catalyzed Cross-Coupling of Sb-Aryl Stibines with Halogenomethyl Arenes to Give Unsymmetric Diarylmethanes, Application In Synthesis of 613-33-2, the publication is Organic Letters (2022), 24(17), 3155-3160, database is CAplus and MEDLINE.

Herein, a general method for the synthesis of unsym. diarylmethanes RCH₂R¹ (R = 4-cyanophenyl, 3-fluorophenyl, 2-chloro-4-fluorophenyl, etc.; R¹ = Ph, 4-methoxyphenyl, 3-furanyl, etc.) from (hetero)aryl Me halides RCH₂X (X = Br, Cl) and Sb-aryl stibines I was described. This protocol shows a broad substrate scope and a good functional group tolerance. Drug mols., including beclobrate and bifemelane, and drug derivatives, including celecoxib, ibuprofen, and probenecid, were efficiently synthesized on a gram scale.

Organic Letters published new progress about 613-33-2. 613-33-2 belongs to catalysis-chemistry, auxiliary class Benzene, name is 4,4′-Dimethyldiphenyl, and the molecular formula is C9H9F5Si, Application In Synthesis of 613-33-2.

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

Fei, Haiyang published the artcileStereospecific Electrophilic Fluorocyclization of ¦Á,¦¢-Unsaturated Amides with Selectfluor, Application In Synthesis of 104-03-0, the publication is Organic Letters (2020), 22(7), 2651-2656, database is CAplus and MEDLINE.

An efficient fluorocyclization of ¦Á,¦¢-unsaturated amides I (R = Ph, 4-methoxyphenyl, 4-nitrophenyl, i-Pr, n-Bu, Bn; R¹ = H, Me, Et, Ph, n-Pr, cyclopropyl, 4-methylphenyl, 4-nitrophenyl; R² = H, Me, Et, Ph, octyl, etc.; R³ = H, Me, Et, Ph, n-Pr, cyclohexyl, etc.; R⁴ = Me, Et, i-Pr, t-Bu) through a formal halocyclization process is developed. The reaction proceeds under transition-metal-free conditions and leads to the formation of fluorinated oxazolidine-2,4-diones II with excellent regio- and diastereoselectivity. The evaluation of the reaction mechanism based on preliminary experiments and d. functional theory calculations suggests that a synergetic syn-oxo-fluorination occurs and is followed by an anti-oxo substitution reaction. The reaction opens a new window in the field of stereospecific fluorofunctionalization.

Organic Letters published new progress about 104-03-0. 104-03-0 belongs to catalysis-chemistry, auxiliary class Nitro Compound,Carboxylic acid,Benzene, name is 4-Nitrophenylacetic acid, and the molecular formula is C8H7NO4, Application In Synthesis of 104-03-0.

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