Tag: M.W=200-250

Krut’ko, N. P. published the artcileAdsorption-induced depression of the strength of potassium chloride grains under the action of fatty amines and water, Product Details of C14H31NO2, the publication is Russian Journal of Applied Chemistry (2005), 78(8), 1213-1217, database is CAplus.

The surface activity of higher aliphatic amines and their salts at the interface between their solutions and air, oil, and KCl grains and their influence on the strength characteristics, moisture absorption, and caking of the grains were studied.

Russian Journal of Applied Chemistry 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, Product Details of C14H31NO2.

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

Blower, Philip J. published the artcileComplexes of molybdenum(II) and -(IV) and tungsten(II) with sterically hindered thiolate ligands. Synthesis, reactivity, and x-ray crystal structures of tetraphenylphosphonium dicarbonyltris(2,4,6-triisopropylbenzenethiolato)molybdenum(II) and (methyl cyanide)(phenyldiazenido)tris(2,4,6-triisopropylbenzenethiolato)molybdenum(IV), Recommanded Product: 2,4,6-Triisopropylbenzenethiol, the publication is Journal of the Chemical Society, Dalton Transactions: Inorganic Chemistry (1972-1999) (1985), 2639-45, database is CAplus.

Reaction of [MBr₂(CO)₄] (M = Mo, W) reacted with SR^– to give [M(SR)₃(CO)₂]^– [R = C₆H₂(CHMe₂)₃-2,4,6, C₆H₃(CHMe₂)₂-2,6, C₆H₂Br(CHMe₂)₂-4,2,6, C₆H₂Me₃-2,4,5, C₆F₅], isolated as their [PPh₄]⁺ salts (I). I reacted with CO to give [PPh₄][M(SR)₃(CO)₃]. Reaction of I [R = C₆H₂(CHMe₂)₃-2,4,6] (II) with neutral donors gave [PPh₄][Mo[SC₆H₂(CHMe₂)₃-2,4,6]₃(CO)L] (L = MeCN, Me₃CCN, PMe₂Ph, Me₃CNC) and with [N₂Ph][BF₄] in MeCN to give [Mo(NNPh)[SC₆H₂(CHMe₂)₃-2,4,6]₃(NCMe)] (III). The structures of II and III were determined by x-ray crystallog.; results were refined to R values of 0.0755 and 0.075 for 2939 and 1172 reflections, resp., for II and III, resp. The anions in II and III have trigonal-bipyramidal structures with axial coligands.

Journal of the Chemical Society, Dalton Transactions: Inorganic Chemistry (1972-1999) 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, Recommanded Product: 2,4,6-Triisopropylbenzenethiol.

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

Wang, Xin published the artcileFlavonoids and antioxidant activity of rare and endangered fern: Isoetes sinensis, Name: 4-(Phenoxymethyl)benzoic acid, the publication is PLoS One (2020), 15(5), e0232185, database is CAplus and MEDLINE.

Isoetes sinensis Palmer is a critically endangered, first-class protected plant in China. Until now, researchers have primarily focused on the ultrastructure, phylogeny, and transcriptomes of the plant. However, flavonoid profiles and bioactivity of I. sinensis have not been extensively investigated. To develop the endangered I. sinensis for edible and medicinal purposes, flavonoid content, chem. constitution, and antioxidant activities were investigated in this study. Results revealed the following. 1) The total flavonoid content was determined as 10.74 ¡À 0.25 mg/g., 2) Antioxidant activities were stronger than most ferns, especially ABTS free radical scavenging activities. 3) Four flavones, containing apigenin, apigenin-7-glucuronide, acacetin-7-O-glcopyranoside, and homoplantageninisoetin; four flavonols, namely, isoetin, kaempferol-3-O-glucoside, quercetin-3-O-[6″-O-(3-hydroxy-3-methylglutaryl)-¦Â-D-glucopyranoside], and limocitrin-Neo; one prodelphinidin (procyanidins;) and one nothofagin (dihydrochalcone) were tentatively identified in the mass spectrometry-DAD (254nm) chromatograms. This study was the first to report on flavonoid content and antioxidant activities of I. sinensis. Stronger antioxidant activity and flavonoid content suggests that the endangered I. sinensis is an important and potentially edible and medicinal plant.

PLoS One published new progress about 31719-76-3. 31719-76-3 belongs to catalysis-chemistry, auxiliary class Carboxylic acid,Benzene,Ether, name is 4-(Phenoxymethyl)benzoic acid, and the molecular formula is C4H10O2, Name: 4-(Phenoxymethyl)benzoic acid.

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

Hevesi, L. published the artcilePeculiarities in the cleavage by methyllithium of unsymmetrical disilanes, Application of Trimethyl(perfluorophenyl)silane, the publication is Tetrahedron Letters (1994), 35(43), 8031-2, database is CAplus.

The title reactions did not produce the more stable silyl anions from the disilanes studied. These reactions either occurred by attack at the more electrophilic Si atom, or led to unexpected products. Three different reaction pathways were observed, depending on the substituents. Thus, treating Me₃SiSiMe₂C₆H_nX_5-n (X = H; X = 4-Cl, n = 4; X = 3-CF₃, 4-Cl, n = 3 1a–c) with MeLi in HMPA gave predominantly Me₃SiC₆H_nX_5-n. Similar reaction of 1d (X = 3,5-Cl₂, n = 3) gave almost quant. m-Cl₂C₆H₄, whereas 1e (X = F₅, n = 0) gave C₆HF₅ and polymeric -(Me₂Si)-_n.

Tetrahedron Letters 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 of Trimethyl(perfluorophenyl)silane.

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

Vermeulen, Nicolaas A. published the artcileSynthesis of Complex Allylic Esters via C-H Oxidation vs C-C Bond Formation, Product Details of C11H12O4, the publication is Journal of the American Chemical Society (2010), 132(32), 11323-11328, database is CAplus and MEDLINE.

A highly general, predictably selective C-H oxidation method for the direct, catalytic synthesis of complex allylic esters is introduced. This Pd(II)/sulfoxide-catalyzed method allows a wide range of complex aryl and alkyl carboxylic acids R¹CO₂H [R¹ = Me, Ph, (E)-2,4-(MeO)₂C₆H₃CH:CH, 3,4-F₂C₆H₃CH₂, BocNHCH₂CH₂, etc.] to couple directly with terminal olefins R²CH₂CH:CH₂ (R² = Ph, benzodioxolan-5-yl, t-BuSiMe₂CH₂CH₂, etc.) to furnish (E)-allylic esters R²CH:CHCH₂OCOR¹ in synthetically useful yields and selectivities (16 examples, E/Z ¡Ý 10:1) and without the use of stoichiometric coupling reagents or unstable intermediates. Strategic advantages of constructing allylic esters via C-H oxidation vs C-C bond-forming methods are evaluated and discussed in four “case studies”.

Journal of the American Chemical Society 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 C15H21BO2, Product Details of C11H12O4.

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

Botta, Bruno published the artcileSynthesis of C-Alkylcalix[4]arenes. 4. Design, Synthesis, and Computational Studies of Novel Chiral Amido[4]resorcinarenes, Safety of (E)-3-(2,4-Dimethoxyphenyl)acrylic acid, the publication is Journal of Organic Chemistry (1997), 62(4), 932-938, database is CAplus.

In extending our studies involving BF₃¡¤Et₂O-catalyzed reaction of cinnamic acid analogs, we have shown that amido derivatives also can afford [4]resorcinarene octamethyl ethers. Subsequently, chiral monomeric amides, derived from the mixed anhydride of cinnamic acid and L– or D-valine, upon treatment with BF₃¡¤Et₂O, yielded for the first time chiral amido[4]resorcinarenes in enantiomerically pure forms. Four stereoisomers were isolated, and three of them were assigned the flattened-cone, chair, and 1,2-alternate conformations. The major product was assigned a novel chairlike structure, namely, flattened partial cone 1. The flattened-cone stereoisomer, which was indicated by mol. modeling studies to be the most stable, became the major product under more drastic exptl. conditions. Chromatog. studies on chiral phases revealed that the above tetramers could be used for the enantiodiscrimination of racemic mols.

Journal of Organic Chemistry 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, Safety of (E)-3-(2,4-Dimethoxyphenyl)acrylic acid.

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

Roos, Casey B. published the artcileEnantioselective Hydroamination of Alkenes with Sulfonamides Enabled by Proton-Coupled Electron Transfer, Recommanded Product: 2,4,6-Triisopropylbenzenethiol, the publication is Journal of the American Chemical Society (2020), 142(13), 5974-5979, database is CAplus and MEDLINE.

An enantioselective, radical-based method for the intramol. hydroamination of alkenes with sulfonamides to afford pyrrolidines I [R¹ = Ph, 2-thienyl, 2,4,6-tri-MeC₆H₂, etc.; R² = H, Me; R³ = Me, t-Bu, CH₂CH₂CH=CMe₂; R²R³ = (CH₂)₂, (CH₂)₅, CH₂CH₂NBocCH₂CH₂] was reported. These reactions were proposed to proceed via N-centered radicals formed by proton-coupled electron transfer (PCET) activation of sulfonamide N-H bonds. Noncovalent interactions between the neutral sulfonamidyl radical and a chiral phosphoric acid generated in the PCET event were hypothesized to serve as the basis for asym. induction in a subsequent C-N bond forming step, achieving selectivities of up to 98:2 er. These results offer further supported for the ability of noncovalent interactions to enforce stereoselectivity in reactions of transient and highly reactive open-shell intermediates.

Journal of the American Chemical Society 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, Recommanded Product: 2,4,6-Triisopropylbenzenethiol.

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

McCann, Malachy published the artcileCopper(II) complexes of benzene-1,2-dioxyacetic acid (bdoaH₂): x-ray crystal structure of [Cu₂(bdoa)(phen)₄]bdoa.13H₂O (phen = 1,10-phenanthroline), Recommanded Product: 2,2-(1,2-Phenylenebis(oxy))diacetic acid, the publication is Polyhedron (1994), 13(2), 221-6, database is CAplus.

Cu(II) acetate reacts with benzene-1,2-dioxyacetic acid (bdoaH₂) in aqueous media to give [Cu(bdoa)(H₂O)₂] (1). 1 Reacts with the N-donor ligands pyridine (py), NH₃ and 1,10-phenanthroline (phen) to give [Cu(bdoa)(NH₃)₂].H₂O (2), [Cu(bdoa)(py)₂].H₂O (3) and [Cu₂(bdoa)(phen)₄]bdoa.13H₂O (4), resp. The x-ray crystal structure of the dicopper(II,II) complex 4 shows each Cu atom at the center of a distorted trigonal bipyramid comprising 4 N atoms from 2 chelating phen ligands and a single O atom from 1 of the carboxylate moieties of the bridging bdoa^2- ligand. The cyclic voltammogram of 4 shows a single reversible wave for the Cu²⁺/Cu⁺ couple at E_1/2 = +115 mV (vs. Ag/AgCl). Spectroscopic and magnetic data for the complexes are given.

Polyhedron 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

Karki, Bhupal S. published the artcileVisible Light-Induced, Metal-Free Denitrative [3+2] Cycloaddition for Trisubstituted Pyrrole Synthesis, Application In Synthesis of 4230-93-7, the publication is Chemistry – An Asian Journal (2019), 14(24), 4793-4797, database is CAplus and MEDLINE.

A metal-free, regioselective synthesis of trisubstituted pyrroles has been developed through a formal [3+2] cycloaddition reaction between 2H-azirines and nitroalkenes under visible light/photoredox-catalyzed conditions. The reaction proceeds through 2H-azaallenyl radical addition on ¦Â-nitrostyrenes in a Michael fashion followed by a base-mediated denitration reaction. The directive group influence of the nitro group controls the regiochem. of the reaction.

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 C10H11NO4, Application In Synthesis of 4230-93-7.

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

Csiba, I. published the artcileOrganic ammonium salts. XV. Preparation and antimicrobial activity of alkylammonium salts of 2-(N,N-dimethylamino)-esters of benzoic, phenylacetic and phenoxyacetic acids, Name: 2-(4-(tert-Butyl)phenoxy)acetic acid, the publication is Cesko-Slovenska Farmacie (1986), 35(2), 61-7, database is CAplus.

The preparation of 22 new organic ammonium unsubstituted salts and p–tert-Bu substituted benzoyl-, phenylacetyl-, and phenoxyacetyloxyethylalkyldimethylammonium bromides and alkyldimethyl-p–tert-butylbenzylammonium bromides is reported, where the linear alkyl chain (R) has 8-16 C atoms. Besides the preparation of the above-mentioned compounds, soft analogs of hard antimicrobially active benzalkonium salts were investigated for the influence of structural changes on the antimicrobial activity, expressed as the min. inhibitory concentration (MIC). The test strains included Staphylococcus?aureus, Escherichia?coli and Candida?albicans. A change in the length of the alkyl chain influenced the activity against E. coli only, the course of the dependence MIC = f(R) was nonlinear, and maximum effectiveness was achieved in decyl and dodecyl derivatives This structural change did not principally influence the activity against S. aureus and C. albicans. The presence of the p–tert-Bu group in the mol. enhanced the activity against S. aureus and C. albicans, the introduction of the ester group into the mol. decreased the activity against E. coli. Interruption of the conjugation of the aromate by the CH₂ and the O-CH₂ bridge decreased the activity against E. coli; the effectiveness against S. aureus and C. albicans was not markedly changed. In comparison with the hard analog Ajatin (benzyldodecyldimethylammonium bromide) the compounds under study were more effective and comparable to Septonex (N-[1-(ethoxycarbonyl)pentadecyl]trimethylammonium bromide) in all 3 microorganisms tested. The proposed products of hydrolytic degradation of the compounds with an ester group show a low (dodecyl-2-hydroxyethyldimethylammonium bromide) or negligible (the pertinent substituted and unsubstituted acids) antimicrobial activity and from this point of view the studied ammonium salts with an ester group in the mol. can be classed into the category of soft antimicrobially effective compounds

Cesko-Slovenska Farmacie 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, Name: 2-(4-(tert-Butyl)phenoxy)acetic acid.

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