Tag: M.W=100-150

Hudec, Jozef published the artcileContent of Phenolic Compounds and Free Polyamines in Black Chokeberry (Aronia melanocarpa) after Application of Polyamine Biosynthesis Regulators, Product Details of C3H12Cl2N2, the publication is Journal of Agricultural and Food Chemistry (2006), 54(10), 3625-3628, database is CAplus and MEDLINE.

The total contents of anthocyanins, flavonoids, and phenolics in 60 samples of black chokeberries (Aronia melanocarpa), after treating with catabolites of polyamine biosynthesis (KPAb) and ornithine decarboxylase inhibitor, were analyzed spectrophotometrically, and quercetin and free polyamine contents were analyzed by RP-HPLC with UV detection. The average total contents of the individual substances and phenolic subgroups in control berries were as follows (mg·kg^-1): anthocyanines, 6408; flavonoids, 664; phenolics, 37 600; quercetin, 349. KPAb decreased total contents of anthocyanines and phenolics only slightly but significantly increased the content of flavonoids. This caused an important change in the abundance of flavonoids in the pigment complex. The absolute content of quercetin was increased, but its ratio to flavonoids content was decreased. Ornithine decarboxylase inhibitor had a markedly different effect as it significantly increased total content of anthocyanins and total phenolics, inhibited the total content of free polyamines, and stimulated the processes of saccharides transformation to phenolic pigments.

Journal of Agricultural and Food Chemistry published new progress about 10517-44-9. 10517-44-9 belongs to catalysis-chemistry, auxiliary class Salt,Amine,Aliphatic hydrocarbon chain, name is Propane-1,3-diamine dihydrochloride, and the molecular formula is C3H12Cl2N2, Product Details of C3H12Cl2N2.

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

Cater, Henry L. published the artcileUser Guide to Ring-Opening Metathesis Polymerization of endo-Norbornene Monomers with Chelated Initiators, Computed Properties of 6950-53-4, the publication is Macromolecules (Washington, DC, United States) (2022), 55(15), 6671-6679, database is CAplus.

The development of facile synthetic strategies to access well-defined polymers promises to provide advanced soft materials with functionality that rivals that observed from nature. To this end, ring-opening metathesis polymerization (ROMP) presents a compositionally simple and rapid strategy for controlled polymerization, yet it has received far less attention relative to radical counterparts. This limited attention arises in part from scattered reports on optimization strategies and a narrow monomer scope. Contemporary ROMP methods favor the use of exo-norbornene derivatives and highly reactive nonchelated Ru-alkylidenes, such as Grubbs Catalysts. In contrast, endo-norbornene derivatives, from which analogous exo-forms are often generated, present a more accessible alternative, yet examples of their utility in ROMP remain scarce. Herein, a systematic examination of ROMP with endo-norbornene monomers using stable chelated Ru-alkylidene initiators is presented. Through initiator screening and polymerization optimization, the ROMP process is shown to be versatile and robust, providing rapid access to polymers with excellent mol. weight control, low dispersities (D < 1.1), good functional group tolerance, and high chain-end fidelity that enabled the preparation of block copolymers via sequential monomer addition Furthermore, the process is oxygen-tolerant, allowing for ROMP to be performed under ambient conditions on the bench, which was showcased in synthesizing mech. robust endo-norbornene imide thermoplastics with high glass transition and decomposition temperatures This report provides a comprehensive overview of the scope and limitations of endo-norbornene ROMP with chelated initiators, serving as a user guide for the polymer chem. community to develop well-defined next-generation functional plastics.

Macromolecules (Washington, DC, United States) published new progress about 6950-53-4. 6950-53-4 belongs to catalysis-chemistry, auxiliary class Salt,sulfides,Amine,Aliphatic hydrocarbon chain, name is 2-(Methylthio)ethanamine hydrochloride, and the molecular formula is C3H10ClNS, Computed Properties of 6950-53-4.

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

Nwachukwu, Blessing Chidinma published the artcileEffects of soil properties and carbon substrates on bacterial diversity of two sunflower farms, Recommanded Product: (S)-2-Amino-4-(methylthio)butanoic acid, the publication is AMB Express (2022), 12(1), 47, database is CAplus and MEDLINE.

The sustainable production of sunflower (Helianthus annuus) is crucial and one way to accomplish this feat is to have an understanding of the beneficial bacteria of sunflower rhizosphere. Similarly, the respiratory response of these bacteria needs to be studied to understand their roles in the ecosystem. This study was therefore conceptualized to gain insights into the effects of soil properties and carbon substrate utilization on bacterial community diversity of sunflower rhizosphere grown in Ditsobottla and Kraaipan, North West Province, South Africa. Extracted DNA from sunflower rhizosphere and bulk soils was subjected to 16S amplicon sequencing. Significant differences were observed in the alpha and beta diversities of the soil bacterial communities (p < 0.05). At the order level, among all the bacterial taxa captured in the farms, Bacillales were the most dominant. The abundance of Lactobacillales, Bacillales, Rhizobiales, Enterobacteriales, Burkholderiales, Flavobacteriales, Sphingomonadales, Myxococcales, and Nitrosomonadales obtained from Ditsobottla rhizosphere soil (R1) was pos. influenced by organic matter (OM), while the abundance of Planctomycetales, Cytophagales, Gemmatimonadales, Nitrospirales and Caulobacteriales from Kraaipan rhizosphere soil (R2) was pos. influenced by total N and pH. Bacterial communities of all the soil samples utilized the different carbon substrates (three amino acids, six carbohydrates, and three carboxylic acids) as an energy source. Significant differences (p < 0.05) were only observed in tryptophan and methionine amended soils. Unclassified bacteria were also captured in this study, such bacteria can further be harnessed for sustainable production of sunflower and other agricultural crops.

AMB Express published new progress about 63-68-3. 63-68-3 belongs to catalysis-chemistry, auxiliary class Natural product, name is (S)-2-Amino-4-(methylthio)butanoic acid, and the molecular formula is C5H11NO2S, Recommanded Product: (S)-2-Amino-4-(methylthio)butanoic acid.

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

Zhang, Nan published the artcileSynthesis and SAR of 6-chloro-4-fluoroalkylamino-2-heteroaryl-5-(substituted)phenylpyrimidines as anti-cancer agents, Recommanded Product: 1,1,1-Trifluoropropan-2-amine, the publication is Bioorganic & Medicinal Chemistry (2009), 17(1), 111-118, database is CAplus and MEDLINE.

The synthesis and SAR of a series of 6-chloro-4-fluoroalkylamino-2-heteroaryl-5-(substituted)phenylpyrimidines as anti-cancer agents are described. This series of 2-heteroarylpyrimidines was developed by modifying a series of anti-tumor [1,2,4]triazolo[1,5-a]pyrimidines and 2-cyanoaminopyrimidines we reported earlier. For the 2-heteroaryl group, the best activity is obtained when the heteroaryl group has a nitrogen atom at the ortho-position to the pyrimidyl core. The structure-activity relationship for the rest of the mol. in this 2-heteroarylpyrimidine series mimics that of the [1,2,4]triazolo[1,5-a]pyrimidine series. Like triazolopyrimidines and 2-cyanoaminopyrimidines, the 2-heteroarylpyrimidines retain the capability to overcome multidrug resistance due to Pgp. Mechanism of action studies showed that the lead compounds behaved in the same manner as triazolopyrimidines and 2-cyanoaminopyrimidines. The lead compounds in this series are more potent than the corresponding triazolopyrimidines in vitro and in vivo. Compound 21 (PTI-868) showed tumor growth inhibition in several nude mouse xenograft models, and was selected to advance to preclin. development.

Bioorganic & Medicinal Chemistry published new progress about 421-49-8. 421-49-8 belongs to catalysis-chemistry, auxiliary class Trifluoromethyl,Fluoride,Amine,Aliphatic hydrocarbon chain, name is 1,1,1-Trifluoropropan-2-amine, and the molecular formula is C6H12N2O, Recommanded Product: 1,1,1-Trifluoropropan-2-amine.

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

Jiang, Jingyun published the artcilePoly-quasi-eutectic solvents (PQESs): versatile solvents for dissolving metal oxides, Computed Properties of 6972-05-0, the publication is Green Chemistry (2019), 21(20), 5571-5578, database is CAplus.

The concept of poly-quasi-eutectic solvents (PQESs) has been proposed in this study. A class of PQESs composed of polymers, namely polyethylene glycol (PEG), poly(ethylene glycol)-block-poly(propylene glycol)-block poly(ethylene glycol) (P123), poly(propylene glycol) bis(2-aminopropyl ether) (PPG-NH₂), and poly(ethylene glycol) di-Me ether (DMPEG), and hydrogen bonding donors (HBDs, including carboxylic acids and amides) were prepared, which could be used for dissolving metal oxides. The PQESs were formed by simply mixing the selected polymers and HBDs. The PEG-based PQESs have excellent physiochem. properties, including negligible volatility, low viscosity, intrinsic conductivity, and wide electrochem. windows. Moreover, they were shown to be good solvents for metal oxides, which have potential applications in industrial metallurgical processes.

Green Chemistry 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, Computed Properties of 6972-05-0.

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

Konteatis, Zenon published the artcileVorasidenib (AG-881): A First-in-Class, Brain-Penetrant Dual Inhibitor of Mutant IDH1 and 2 for Treatment of Glioma, Computed Properties of 421-49-8, the publication is ACS Medicinal Chemistry Letters (2020), 11(2), 101-107, database is CAplus and MEDLINE.

Inhibitors of mutant isocitrate dehydrogenase (mIDH) 1 and 2 cancer-associated enzymes prevent the accumulation of the oncometabolite D-2-hydroxyglutarate (2-HG) and are under clin. investigation for the treatment of several cancers harboring an IDH mutation. Herein, we describe the discovery of vorasidenib (AG-881), a potent, oral, brain-penetrant dual inhibitor of both mIDH1 and mIDH2. X-ray cocrystal structures allowed us to characterize the compound binding site, leading to an understanding of the dual mutant inhibition. Furthermore, vorasidenib penetrates the brain of several preclin. species and inhibits 2-HG production in glioma tissue by >97% in an orthotopic glioma mouse model. Vorasidenib represents a novel dual mIDH1/2 inhibitor and is currently in clin. development for the treatment of low-grade mIDH glioma.

ACS Medicinal Chemistry Letters published new progress about 421-49-8. 421-49-8 belongs to catalysis-chemistry, auxiliary class Trifluoromethyl,Fluoride,Amine,Aliphatic hydrocarbon chain, name is 1,1,1-Trifluoropropan-2-amine, and the molecular formula is C3H6F3N, Computed Properties of 421-49-8.

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

Montoya, Iago Antonio published the artcileInfluence prediction of small organic molecules (ureas and thioureas) upon electrical percolation of AOT-based microemulsions using artificial neural networks, Formula: C3H8N2S, the publication is Tenside, Surfactants, Detergents (2012), 49(4), 316-320, database is CAplus.

In order to predict percolation temperature of AOT-Based microemulsions (AOT/iC₈/H₂O w/o microemulsions) in the presence of small organic mols. (ureas and thioureas), different Artificial Neural Network architectures (ANN) have been carried out using a Perceptron Multilayer Artificial Neural Network with three entrance variables (W = value of the microemulsion, additive concentration, logP value). Best ANN architecture consists in three input neurons, one middle layer (with two neurons) and one output neuron. Correlation values were R = 0.9251 for the training set and R = 0.9719 for the prediction set.

Tenside, Surfactants, Detergents 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, Formula: C3H8N2S.

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

Yokoyama, Masataka published the artcileSynthesis of heterocycles using a new immonium salt derived from N,N-dimethylthiourea, Computed Properties of 6972-05-0, the publication is Journal of the Chemical Society, Perkin Transactions 1: Organic and Bio-Organic Chemistry (1972-1999) (1982), 1059-62, database is CAplus.

Treatment of Me₂NCSNH₂ with NaH, CS₂ and MeI in THF gave Me₂NC(SMe):N⁺MeCS₂Me I^– (I), which underwent cyclocondensation reactions with nucleophiles to give heterocycles including triazolines, an oxadiazole, a thiazole, a triazine, a benzoxadiazepine and a benzothiadiazepine. E.g., I was refluxed in EtOH with N₂H₄ for 4 h to give 74% triazolinethione II. Similar treatment of I with HSCH₂CO₂Et-LiN(CHMe₂)₂ in THF at -70° for 1 h and at room temperature for 1 h gave 47% thiazole III.

Journal of the Chemical Society, Perkin Transactions 1: Organic and Bio-Organic Chemistry (1972-1999) 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 C14H28O5S, Computed Properties of 6972-05-0.

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

Mendes, Sofia R. O. published the artcileVibrational and conformational studies of 1,3-diaminopropane and its N-deuterated and N-ionized derivatives, COA of Formula: C3H12Cl2N2, the publication is New Journal of Chemistry (2017), 41(18), 10132-10147, database is CAplus.

A vibrational and conformational anal. of the linear alkylpolyamine 1,3-diaminopropane (1,3-dap) is reported, using vibrational spectroscopy (Raman, Fourier Transform IR (FTIR) and inelastic neutron scattering (INS)) coupled to theor. approaches at the D. Functional Theory (DFT) level. The quantum mech. calculations were carried out using the mPW1PW functional and the 6-31G* basis set, for the isolated mol., the condensed phase, and solutions in both water and carbon tetrachloride. The most stable geometries were calculated to be GGG’G and TG’GG’ for the gaseous phase and the CCl₄ solution, and TTTT, TGTT and TTTG for the condensed phase and the aqueous solution Since the relative populations obtained for the different 1,3-dap conformers were very similar, the corresponding exptl. spectra reflect the presence of a mixture of species. The vibrational data obtained for 1,3-dap in its pure form – unprotonated, totally protonated (N-ionized) and N-deuterated – as well as for its aqueous and CCl₄ solutions, were assigned in the light of the theor. results presently obtained and exptl. data previously gathered for similar compounds

New Journal of Chemistry published new progress about 10517-44-9. 10517-44-9 belongs to catalysis-chemistry, auxiliary class Salt,Amine,Aliphatic hydrocarbon chain, name is Propane-1,3-diamine dihydrochloride, and the molecular formula is C3H12Cl2N2, COA of Formula: C3H12Cl2N2.

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

De Proft, F. published the artcileQuantum-Chemical Study of the Acidity of Substituted Acetic Acids with Density Functional Theory Based Descriptors, Product Details of C3H4F2O2, the publication is Journal of Physical Chemistry (1994), 98(20), 5227-33, database is CAplus.

Acidity differences of substituted acetic acids XCH₂COOH are interpreted in terms of the nature of the group X. Traditional quantum-chem. and d. functional theory based descriptors of chem. reactivity are calculated for 15 acids and are correlated with exptl. acidities in aqueous solution and in the gas phase. The results are interpreted within the framework of Pearson’s hard and soft acids and bases principle, stating that hard acids prefer to bond to hard bases and soft acids prefer to bond to soft bases. Calculated parameters, which are a measure of local hardness, show a pos. correlation with the exptl. acidities. The acidities in aqueous solution show almost no dependence on the softness (polarizability) of the group X, while this group softness seems to play an important role in the gas phase, although it is a minor one in comparison to the hard parameters.

Journal of Physical Chemistry published new progress about 155142-69-1. 155142-69-1 belongs to catalysis-chemistry, auxiliary class Difluoromethyl,Fluoride,Carboxylic acid,Aliphatic hydrocarbon chain, name is 3,3-Difluoropropanoic acid, and the molecular formula is C3H4F2O2, Product Details of C3H4F2O2.

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