Tag: M.W=100-150

Valo, Erkka published the artcileEffect of serum sample storage temperature on metabolomic and proteomic biomarkers, Product Details of C5H11NO2S, the publication is Scientific Reports (2022), 12(1), 4571, database is CAplus and MEDLINE.

Prospective biomarker studies can be used to identify biomarkers predictive of disease onset. However, if serum biomarkers are measured years after their collection, the storage conditions might affect analyte concentrations Few data exists concerning which metabolites and proteins are affected by storage at – 20¡ãC vs – 80¡ãC. Our objectives were to document analytes affected by storage of serum samples at – 20¡ãC vs – 80¡ãC, and to identify those indicative of the storage temperature We utilized liquid chromatog. tandem mass spectrometry and Luminex to quantify 300 analytes from serum samples of 16 Finnish individuals with type 1 diabetes, with split-aliquot samples stored at – 80¡ãC and – 20¡ãC for a median of 4.2 years. Results were validated in 315 Finnish and 916 Scottish individuals with type 1 diabetes, stored at – 20¡ãC and at – 80¡ãC, resp. After quality control, we analyzed 193 metabolites and proteins of which 120 were apparently unaffected and 15 clearly susceptible to storage at – 20¡ãC vs – 80¡ãC. Further, we identified serum glutamate/glutamine ratio greater than 0.20 as a biomarker of storage at – 20¡ãC vs – 80¡ãC. The results provide a catalog of analytes unaffected and affected by storage at – 20¡ãC vs – 80¡ãC and biomarkers indicative of sub-optimal storage.

Scientific Reports 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 C10H2F12NiO4, Product Details of C5H11NO2S.

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

Bertuzzi, Giulio published the artcileOrganocatalytic Enantioselective Construction of Conformationally Stable C(sp²)-C(sp³) Atropisomers, COA of Formula: C8H8O2, the publication is Journal of the American Chemical Society (2022), 144(2), 1056-1065, database is CAplus and MEDLINE.

Nonbiaryl atropisomers are mols. defined by a stereogenic axis featuring at least one nonarene moiety. Among these, scaffolds bearing a conformationally stable C(sp²)-C(sp³) stereogenic axis have been observed in natural compounds; however, their enantioselective synthesis remains almost completely unexplored. Herein we disclose a new class of chiral C(sp²)-C(sp³) atropisomers obtained with high levels of stereoselectivity (up to 99% ee) by means of an organocatalytic asym. methodol. Multiple mol. motifs could be embedded in this class of C(sp²)-C(sp³) atropisomers, showing a broad and general protocol. Exptl. data provide strong evidence of the conformational stability of the C(sp²)-C(sp³) stereogenic axis (up to t_1/2²⁵?^¡ãC >1000 y) in the obtained compounds and show kinetic control over this rare stereogenic element. This, coupled with d. functional theory calculations, suggests that the observed stereoselectivity arises from a Curtin-Hammett scenario establishing an equilibrium of intermediates. Furthermore, the exptl. investigation led to evidence of the operating principle of central-to-axial chirality conversions.

Journal of the American Chemical Society published new progress about 118-90-1. 118-90-1 belongs to catalysis-chemistry, auxiliary class Carboxylic acid,Benzene,Natural product, name is 2-Methylbenzoic acid, and the molecular formula is C8H8O2, COA of Formula: C8H8O2.

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

Rapsomanikis, Spyridon published the artcileMethylation of lead(II) and methyllead(IV) compounds in water by a trans-dimethylcobalt(III) complex, Recommanded Product: Propane-1,3-diamine dihydrochloride, the publication is Inorganica Chimica Acta (1984), 89(3), 179-83, database is CAplus.

The Me cobalamin model and carbanion donor [CoLMe₂]ClO₄ (I) was prepared by the reaction of H₂N(CH₂)₃NH₂, MeCOCOMe, and Co(OAc)₂ to give [CoLCl₂]ClO₄, which was methylated with MeI to give I. I methylated Pb²⁺(aq) to give 0.12% PbMe₄ and 14.2% CH₄; in the Pb^2-I-MnO₂-MeI system, only Pb⁺² and I were necessary for PbMe₄ formation. I also methylated low concentrations of aqueous Me₂PbCl₂ and Me₃PbCl giving 12-22% CH₄ and 33.3-65.0% PbMe₄. Thus aqueous Pb⁺² and partially methylated Pb compounds were methylated by a Me cobalamin model to give toxic, air-transportable PbMe₄ in environmentely significant yields.

Inorganica Chimica Acta 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, Recommanded Product: Propane-1,3-diamine dihydrochloride.

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

Jiang, C. J. published the artcileEconomical and practical strategies for synthesis of ¦Á-trifluoromethylated amines, Synthetic Route of 421-49-8, the publication is Asian Journal of Chemistry (2015), 27(7), 2406-2408, database is CAplus.

A powerful approach to synthesize ¦Á-trifluoromethylated amines RCH(CF₃)NH₂ (R = CH₃, CH₃CH₂, C₆H₅, etc.) has been developed. The method is operationally simple, broad in substrate scope and amenable to scale-up using trifluoroacetic anhydride. Meanwhile, the strategy not only provided a versatile approach to synthesize ¦Á-trifluoromethylated amines but also provides a new method for exploring the new reactivity of trifluoroacetic anhydride.

Asian Journal of 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 C3H6F3N, Synthetic Route of 421-49-8.

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

Jiang, Chengjun published the artcileSynergistic Effect of Pd/C and Novozyme 435 on the Dynamic Kinetic Resolution of 1,1,1-trifluoroisopropylamine, Category: catalysis-chemistry, the publication is Chemical Engineering Communications (2016), 203(9), 1222-1226, database is CAplus.

Response surface methodol. (RSM) was successfully applied to study the synergistic effect of Pd/C and Novozyme 435 on the dynamic kinetic resolution of 1,1,1-trifluoroisopropylamine (TFPA). The variables taken into consideration were reaction temperature, substrate concentration, the Pd/C amount, and the Novozyme 435 amount A statistical model was used to evaluate the influence of the variables on the conversion and enantiomeric excess (ee). It was found that the interaction between the Novozyme 435 and Pd/C was a significant parameter that affected TFPA conversion. The optimum conditions for RSM were: reaction temperature of 35¡ãC, substrate (¡À) – 1 concentration of 0.4 mol/L, 60 g/L of Novozyme 435, and 42.4 g/L of Pd/C (3 wt% of Pd on active carbon). The actual exptl. conversion was 95.6% under optimum conditions, which was comparable to the maximum predicted value of 95.7%.

Chemical Engineering Communications 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, Category: catalysis-chemistry.

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

Kwak, Min-Jin published the artcileSophorolipid protects against early-weaning syndrome by improving the gut microenvironment in early-weaned piglets, Application of (S)-2-Amino-4-(methylthio)butanoic acid, the publication is BMC Veterinary Research (2022), 18(1), 8, database is CAplus and MEDLINE.

In animals, weaning stress is the first and most critical stress. Weaning can neg. affect the growth performance of animals phys., psychol., and pathol. Our previous studies on the HT-29 cell line and early-weaned rats demonstrated that adequate sophorolipid (SPL) supplementation in feed could enhance the mucin-producing and wound healing capacities of the gut defense system by modulating gut microbiota. We conducted an experiment with one hundred forty 21-day-old early weaned piglets (L x Y x D). They were allocated into 4 treatment and 7 replications (4 pigs per pen) according to their initial body weight Body weight and feed intake were measured biweekly during exptl. period. After 6 wk, 28 pigs were randomly selected and sacrificed to collect plasma, jejunum, and cecal content samples. Dietary SPL supplementation at 5 and 10 mg/kg quadratically increased the average daily gain during the exptl. period in the treatment groups when compared with the control group. The albumin levels of piglets fed with the SPL supplemented diet were downregulated to the normal range. Moreover, in feed, SPL supplementation at 5 and 10 mg/kg improved jejunal histol. indexes and gene expression levels related to mucin secretion and local inflammation markers. Consistent with these results, adequate SPL supplementation (5 and 10 mg/kg) increased the population of Prevotella, a beneficial bacterium, and its short-chain fatty acid production in the ceca of piglets. The occurrence of diarrhea after weaning in piglets could be reduced by feeding a 10 ppm of SPL supplemented diet which improves the gut defense system by improving the microbial population and enhancing mucin layer integrity.

BMC Veterinary Research 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, Application of (S)-2-Amino-4-(methylthio)butanoic acid.

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

Fang, Hongbin published the artcileSynthesis and biological activity of amide derivatives derived from natural product Waltherione F, Related Products of catalysis-chemistry, the publication is Medicinal Chemistry Research (2022), 31(3), 485-496, database is CAplus.

Structural optimization based on natural products has become an effective way to develop new fungicides, which provides important guiding significance for practicing the new development concept and promoting the green development of pesticides. In this project, the target compounds containing 4-quinolone and piperazine substructures based on waltherione F were synthesized through the combination of the fungicidal amide lead compound X-I-4 discovered in our previous work and various of fungicidal piperazine derivatives Screening of their biol. activities suggested that products I-3, I-5, II-3, II-7, II-10, II-11 and II-13 displayed higher inhibition rates against Rhizoctonia solani than other tested compounds The in vitro cellular cytotoxicity assay revealed that compounds II-6 and II-11 exhibited higher cytotoxicity against HepG2 than other tested compounds The fluorescence characteristics investigation showed that the absolute fluorescence QY value of the methanol solution of the compound I-6 was higher than those of I-2, I-3, I-7 and I-8, which was further elucidated by TD-DFT.

Medicinal Chemistry Research published new progress about 118-90-1. 118-90-1 belongs to catalysis-chemistry, auxiliary class Carboxylic acid,Benzene,Natural product, name is 2-Methylbenzoic acid, and the molecular formula is C8H8O2, Related Products of catalysis-chemistry.

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

Verma, R. N. published the artcileComparative study of semi empirical calculations of energies and densities of frontier orbitals of Lewis acids and bases, Computed Properties of 6972-05-0, the publication is Inorganic Chemistry: An Indian Journal (2008), 3(2), 154-162, database is CAplus.

Energies and densities of certain Lewis acids and bases have been evaluated by semi empirical methods. AM1, PM3 and PM5, on CACHe Software. The energy values have been mainly used to prepare the scale of hardness, and d. values for identifying sites in different compounds The metal-ligand interaction and the stability of metal-ligand bond have been studied with the help of LUMO d. values of accepter mols. and HOMO d. values of donor mols. The stability of metal ligand bond has also been related with transfer of charge ¦¤N and lowering of energy ¦¤E on complex formation.

Inorganic Chemistry: An Indian Journal 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 C6H10O7, Computed Properties of 6972-05-0.

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

Huang, Tzu-Lun published the artcileCalcium complexes containing oxalamidinate ligands as catalysts for ¦Å-caprolactone polymerization, Recommanded Product: 2-(Methylthio)ethanamine hydrochloride, the publication is Dalton Transactions (2013), 42(25), 9255-9262, database is CAplus and MEDLINE.

A series of calcium complexes containing oxalamidinate ligands is described. Reactions of oxalamidinate ligand precursors, [PhN:C{NH(CH₂)₂OMe}-C{NH(CH₂)₂OMe}:NPh] (1), [PhN:C{NH(CH₂)₂NMe₂}-C{NH(CH₂)₂NMe₂}:NPh] (2), [Ph^TriMeN:C{NH(CH₂)₂OMe}-C{NH(CH₂)₂OMe}:NPh^TriMe] (3), [Ph^TriMeN:C{NH(CH₂)₂SMe}-C{NH(CH₂)₂SMe}:NPh^TriMe] (4), [Ph^TriMeN:C{NHCH₂Py}-C{NHCH₂Py}:NPh^TriMe] (5), with two molar equivalents of Ca[N(SiMe₃)₂]₂(THF)₂ gave calcium oxalamidinate complexes, [Ca{N(SiMe₃)₂}(THF)(PhN)C{N(CH₂)₂OMe}-]₂ (6), [Ca{N(SiMe₃)₂}(THF)(PhN)C{N(CH₂)₂NMe₂}-]₂ (7), [Ca{N(SiMe₃)₂}(THF)(Ph^TriMeN)C{N(CH₂)₂OMe}-]₂ (8), [Ca{N(SiMe₃)₂}(THF)(Ph^TriMeN)C{N(CH₂)₂SMe}-]₂ (9), [Ca{N(SiMe₃)₂}(THF)(Ph^TriMeN)C{NCH₂Py}-]₂ (10), resp. The mol. structure of complex 7 was further characterized by the single crystal x-ray diffraction technique. The catalytic activities of complexes 6-10 toward the ring opening polymerization of ¦Å-caprolactone were studied. Complex 8 exhibited excellent activity for the polymerization of ¦Å-caprolactone with controlled mol. weights and polydispersities.

Dalton Transactions 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, Recommanded Product: 2-(Methylthio)ethanamine hydrochloride.

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

Dravid, R. N. published the artcileDithioallophanic acids. Part-III: Interaction of carbon oxysulfide with 2-S-benzyl-1,1-dimethyl/1-phenylisothiocarbamides, Application In Synthesis of 6972-05-0, the publication is Journal of the Indian Chemical Society (1983), 60(9), 855-7, database is CAplus.

Interaction of COS with 2-S-benzyl-1,1-dimethylisothiocarbamide in benzene gave 1,1-dimethylthiocarbamide thiocyanate, S-benzyl N,N-dimethylthiocarbamate and S-benzyl N,N-di-methyldithiocarbamate. 2-S-Benzyl-1-phenylisothiocarbamide also affords the corresponding thiocarbamate, dithiocarbamate and in addition phenylthiocarbamide. The mechanism was discussed.

Journal of the Indian Chemical Society 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, Application In Synthesis of 6972-05-0.

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