Catalysis-chemistry

Heilmann, Michael published the artcileA Modular Phosphorylated Glycoluril-Derived Molecular Tweezer for Potent Binding of Aliphatic Diamines, Quality Control of 10517-44-9, the publication is Chemistry – A European Journal (2019), 25(56), 12900-12904, database is CAplus and MEDLINE.

A glycoluril-based mol. tweezer I (R = EtO₂C) was prepared; its binding to monoalkylammonium and alkyldiammonium salts was determined Both the hydrophobic cavity and the phosphate groups of I contribute to its binding of ammonium salts; bulkier mols. and mols. bearing neg. charged groups such as carboxylates in amino acids bind less tightly due to steric interference and Coulombic repulsion, resp. The narrow cavity of I and ionic interactions between the phosphate groups of I and ammonium guests favor the binding of aliphatic diamines.

Chemistry – A European Journal 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, Quality Control of 10517-44-9.

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

Calixto-Rodriguez, M. published the artcileX-ray diffraction and compositional studies of AgInS₂ thin films obtained by spray pyrolysis, Name: 1,1-Dimethylthiourea, the publication is Journal of Materials Science (2008), 43(21), 6848-6852, database is CAplus.

Silver indium sulfide (AgInS₂) thin films have been prepared by the spray pyrolysis technique using silver acetate, indium acetate, and N,N-dimethylthiourea as precursor compounds Depending on the film preparation conditions, AgInS₂ thin films are obtained which could be candidates to be used in photovoltaic devices. X-ray diffraction and energy dispersive spectroscopy compositional studies were done on films formed at different substrate temperatures (T_s) and Ag:In:S ratios in the starting solutions When Ag:In:S ratios are 1:1:1, 1:0.25:2, and 1:1:2, x-ray diffraction patterns of the thin films indicated that the crystallog. structure is mainly chalcopyrite AgInS₂. An addnl. phase, acanthite Ag₂S, appeared when the depositions where done at low T_s. Energy dispersive spectroscopy anal. showed that AgInS₂ films near stoichiometric composition were obtained by using an at. ratio of Ag:In:S = 1:1:2 in the starting solution and T_s = 400¡ã.

Journal of Materials Science 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, Name: 1,1-Dimethylthiourea.

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

Liu, Xiao-Jun published the artcileThe influence of NHCs on C-Si and C-C reductive elimination: a computational study of the selectivity of Ni-catalyzed C-H activation of arenes with vinylsilanes, Recommanded Product: Trimethyl(perfluorophenyl)silane, the publication is Chemical Communications (Cambridge, United Kingdom) (2018), 54(57), 7912-7915, database is CAplus and MEDLINE.

D. functional theory calculations were performed to investigate the mechanism and origins of the NHC-controlled selectivity of Ni-catalyzed C-H activation of arenes with vinylsilanes. The key to the selectivity is the different impacts of NHCs on the C-Si/C-C reductive elimination of the square-planar/T-shaped intermediate.

Chemical Communications (Cambridge, United Kingdom) 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, Recommanded Product: Trimethyl(perfluorophenyl)silane.

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

Kong, Xianqiang published the artcileElectrochemical Oxidative C(sp³)-H/N-H Coupling of Diarylmethanes with Sulfoximines or Benzophenone Imine, Name: Bis(4-fluorophenyl)methane, the publication is Journal of Organic Chemistry (2021), 86(19), 13610-13617, database is CAplus and MEDLINE.

An efficient electrochem. method for the synthesis of N-alkylated sulfoximines I [R = Ph, 2-BrC₆H₄, 4-MeOC₆H₄, etc.; R¹ = Me, Et, n-Bu, Ph, 4-MeC₆H₄; Ar¹ = Ph, 4-FC₆H₄, 4-ClC₆H₄; Ar² = Ph, 4-FC₆H₄] by electrochem. oxidative C(sp³)-H/N-H coupling of sulfoximines and diarylmethanes was developed. In addition, used the same conditions for electrochem. dehydrogenative amination of diarylmethanes with benzophenone imine as an aminating agent to obtain II [Ar³ = Ph, 4-MeC₆H₄, 4-FC₆H₄; Ar⁴ = Ph, 4-MeC₆H₄, 4-FC₆H₄, 4-ClC₆H₄]. The reactions showed good functional group tolerance and afforded the corresponding products in moderate to good yields without the use of a stoichiometric oxidant, a metal catalyst, or an activating agent.

Journal of Organic Chemistry published new progress about 457-68-1. 457-68-1 belongs to catalysis-chemistry, auxiliary class Fluoride,Benzene, name is Bis(4-fluorophenyl)methane, and the molecular formula is C13H10F2, Name: Bis(4-fluorophenyl)methane.

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

Jiang, Hui published the artcileComparative and phylogenetic analyses of six Kenya Polystachya (Orchidaceae) species based on complete chloroplast genome sequences, Computed Properties of 63-68-3, the publication is BMC Plant Biology (2022), 22(1), 177, database is CAplus and MEDLINE.

Polystachya Hook. is a large pantropical orchid genus (c. 240 species) distributed in Africa, southern Asia and the Americas, with the center of diversity in Africa. Previous studies on species of this genus have not obtained the complete chloroplast genomes, structures and variations. Addnl., the phylogenetic position of the genus in the Orchidaceae is still controversial and uncertain. Therefore, in this study, we sequenced the complete plastomes of six Kenya Polystachya species based on genome skimming, subjected them to comparative genomic anal., and reconstructed the phylogenetic relationships with other Orchidaceae species. The results exhibited that the chloroplast genomes had a typical quadripartite structure with conserved genome arrangement and moderate divergence. The plastomes of the six Polystachya species ranged from 145,484 bp to 149,274 bp in length and had an almost similar GC content of 36.9-37.0%. Gene annotation revealed 106-109 single-copy genes. In addition, 19 genes are duplicated in the inverted regions, and 16 genes each possessd one or more introns. Although no large structural variations were observed among the Polystachya plastomes, about 1 kb inversion was found in Polystachya modesta and all 11 ndh genes in the Polystachya plastomes were lost or pseudogenized. Comparative anal. of the overall sequence identity among six complete chloroplast genomes confirmed that for both coding and non-coding regions in Polystachya, SC regions exhibit higher sequence variation than IRs. Furthermore, there were various amplifications in the IR regions among the six Polystachya species. Most of the protein-coding genes of these species had a high degree of codon preference. We screened out SSRs and found seven relatively highly variable loci. Moreover, 13 genes were discovered with significant pos. selection. Phylogenetic anal. showed that the six Polystachya species formed a monophyletic clade and were more closely related to the tribe Vandeae. Phylogenetic relationships of the family Orchidaceae inferred from the 85 chloroplast genome sequences were generally consistent with previous studies and robust. Our study is the initial report of the complete chloroplast genomes of the six Polystachya species, elucidates the structural characteristics of the chloroplast genome of Polystachya, and filters out highly variable sequences that can contribute to the development of DNA markers for use in the study of genetic variability and evolutionary studies in Polystachya. In addition, the phylogenetic results strongly support that the genus of Polystachya is a part of the tribe Vandeae.

BMC Plant Biology 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, Computed Properties of 63-68-3.

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

Xiong, Zhichao published the artcileEnantioselective synthesis of chiral multicyclic ¦Ã-lactones via dynamic kinetic resolution of racemic ¦Ã-keto carboxylic acids, Computed Properties of 2051-95-8, the publication is Organic Chemistry Frontiers (2020), 7(1), 104-108, database is CAplus.

Ru-Catalyzed asym. transfer hydrogenation of ¦Ã-keto carboxylic acids was achieved by using the formic acid-triethylamine azeotrope as the hydrogen source, affording chiral multicyclic ¦Ã-lactones in high yields with excellent diastereo- and enantioselectivities (up to 92% yield, >20 : 1 dr and 99% ee). This method provided a highly efficient approach to obtain valuable multicyclic ¦Ã-lactones through a reduction/lactonization sequence. Moreover, a concise synthetic route to obtain bioactive mols. (+)-GR24 and (+)-epi-GR24 had also been developed by using this methodol. as a key step.

Organic Chemistry Frontiers published new progress about 2051-95-8. 2051-95-8 belongs to catalysis-chemistry, auxiliary class Carboxylic acid,Benzene,Ketone, name is 3-Benzoylpropionicacid, and the molecular formula is C9H17NO, Computed Properties of 2051-95-8.

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

Song, Liangliang published the artcileRhodium(III)-catalyzed intermolecular cascade annulation through C-H activation: Concise synthesis of rosettacin, SDS of cas: 1293990-73-4, the publication is Molecular Catalysis (2018), 129-134, database is CAplus.

An intermol. annulation of 2-acetylenic aldehydes or ketones with O-substituted N-hydroxybenzamides or N-hydroxyacrylamides through rhodium(III)-catalyzed C-H activation for the synthesis of isoquinolones and indolizinones is developed. This reaction features excellent functional-group tolerance and broad substrate scope, including annulation of various heterocyclic substrates. This approach evaluates the chemoselectivity of the reaction when sterically hindered diaryl-substituted alkynes are incorporated. This method also furnishes an efficient approach for the total synthesis of rosettacin and a topoisomerase I inhibitor.

Molecular Catalysis published new progress about 1293990-73-4. 1293990-73-4 belongs to catalysis-chemistry, auxiliary class Aliphatic Chain, name is O-Pivaloylhydroxylamine trifluoromethanesulfonate, and the molecular formula is C14H28O5S, SDS of cas: 1293990-73-4.

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

Zhang, K. M. published the artcileROS Produced via BsRBOHD Plays an Important Role in Low Temperature-Induced Anthocyanin Biosynthesis in Begonia semperflorens, Recommanded Product: 1,1-Dimethylthiourea, the publication is Russian Journal of Plant Physiology (2020), 67(2), 250-258, database is CAplus.

Low temperature (LT) is an important elicitor that triggers anthocyanin biosynthesis. To investigate whether the reactive oxygen species (ROS) produced via RBOH are involved in this process, we analyzed the function and mechanism of ROS produced via RBOH during LT-induced anthocyanin biosynthesis in Begonia semperflorens Link & Otto. The results showed that BsRBOHD transcription was upregulated in LT-grown seedlings at the 3rd hour, which was followed by the upregulation of anthocyanin-biosynthesis genes at the 5-9th hour, leading to anthocyanin accumulation on the 2nd day. The LT-induced increases in ROS production, BsRBOHD and anthocyanin-biosynthesis gene transcription, and anthocyanin content were abolished by the pre-treatment of seedlings with DPI [an inhibitor of nicotinamide adenine nucleoside phosphorylase (NADPH) oxidase or DMTU (a H₂O₂ scavenger)], but were promoted by pre-treatment with NADPH (a substrate of NADPH oxidase). Changes in the chlorophyll fluorescence parameters showed that pre-treatment of DPI or DMTU alleviated the LT-induced decrease in the seedling chlorophyll content and a/b ratio, which subsequently alleviated the LT-induced decreases in the ABS/CSm, TRo/CSm, RC/CSm, ETo/CSm and REo/CSm values. In contrast, NAPDH pre-treatment intensified these changes. Therefore, we suggest that ROS produced via BsRBOHD may be involved in the LT-induced anthocyanin biosynthesis by strengthening the overaccumulation of ROS produced by the overexcitation of PSII reaction centers and overflux from [Formula Omitted] to NADP⁺ in B. semperflorens.

Russian Journal of Plant Physiology 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 C13H10F2, Recommanded Product: 1,1-Dimethylthiourea.

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

Xia, Li published the artcileROR¦Ãt agonist enhances anti-PD-1 therapy by promoting monocyte-derived dendritic cells through CXCL10 in cancers, Category: catalysis-chemistry, the publication is Journal of Experimental & Clinical Cancer Research (2022), 41(1), 155, database is CAplus and MEDLINE.

The overall response rate to checkpoint blockade remains unsatisfactory, partially due to the immune-suppressive tumor microenvironment. A retinoic acid-related orphan receptor ¦Ãt (ROR¦Ãt) agonist (LYC-55716) is currently used in clin. trials combined with anti-PD-1, but how the Th17 cell transcription factor ROR¦Ãt enhances antitumor immunity of PD-1 in the tumor microenvironment remains elusive. The expression of mRNA was analyzed using qPCR assays. Flow cytometry was used to sort and profile cells. Cell migration was analyzed using Transwell assays. Biacore was used to determine the binding affinity to the ROR¦Ãt protein. The ROR¦Ãt GAL4 cell-based reporter gene assay was used to measure activity in the ROR¦Ãt driven luciferase reporter gene expression. We designed a potent and selective small-mol. ROR¦Ãt agonist (8-074) that shows robust antitumor efficacy in syngeneic tumor models and improves the efficacy of anti-PD-1 in a murine lung cancer model. ROR¦Ãt agonist treatment increased intratumoral CD8+ T cells, which were correlated with CXCL10 and monocyte-derived dendritic cells (MoDCs). In addition, the ROR¦Ãt agonist promoted Type 17 T cell migration by upregulating CCL20 and CCR6 expression, and Type 17 T cell tumor infiltration. CCL20 induces MoDCs migration, and CXCL10 derived from MoDCs promotes CD8+ T cell migration. Our results revealed that the ROR¦Ãt agonist improved the efficacy of anti-PD-1. The ROR¦Ãt agonist increased the migration of MoDCs, which increased the local levels of CXCL10, thus promoting CD8+ T cell tumor infiltration. Our findings provide the mechanistic insights implicating the ROR¦Ãt agonist in immunotherapy and offer a strategy for targeting the ROR¦Ãt agonist to improve PD-1 antibody efficacy in cancers.

Journal of Experimental & Clinical Cancer Research published new progress about 2055536-64-4. 2055536-64-4 belongs to catalysis-chemistry, auxiliary class Metabolic Enzyme,ROR, name is (S)-3-(6-(3-(Difluoromethoxy)-5-fluorophenyl)-4-((3-(trifluoromethyl)phenyl)sulfonyl)-3,4-dihydro-2H-benzo[b][1,4]oxazin-2-yl)-2,2-dimethylpropanoic acid, and the molecular formula is C20H18BrN3, Category: catalysis-chemistry.

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

Cheekatla, Subba Rao published the artcileAza-Oxa-Triazole Based Macrocycles with Tunable Properties: Design, Synthesis, and Bioactivity, Application of N1,N2-Dibenzylethane-1,2-diamine, the publication is Molecules (2022), 27(11), 3409, database is CAplus and MEDLINE.

A modular platform for the synthesis of tunable aza-oxa-based macrocycles was established. Modulations in the backbone and the side-chain functional groups have been rendered to achieve the tunable property. These aza-oxa-based macrocycles can also differ in the number of heteroatoms in the backbone and the ring size of the macrocycles. For the proof of concept, a library of macrocycles was synthesized with various hanging functional groups, different combinations of heteroatoms, and ring sizes in the range of 17-27 atoms and was characterized by NMR and mass spectrometry. In light of the importance of the copper-catalyzed azide-alkyne cycloaddition (CuAAC) reaction and the significance of triazole groups for various applications, we employed the click-reaction-based macrocyclization. The competence of the synthesized macrocycles in various biomedical applications was proven by studying the interactions with the serum albumin proteins; bovine serum albumin and human serum albumin. It was observed that some candidates, based on their hanging functional groups and specific backbone atoms, could interact well with the protein, thus improving the bioactive properties. On the whole, this work is a proof-of-concept to explore the backbone- and side-chain-tunable macrocycle for different properties and applications.

Molecules published new progress about 140-28-3. 140-28-3 belongs to catalysis-chemistry, auxiliary class Benzenes, name is N1,N2-Dibenzylethane-1,2-diamine, and the molecular formula is C16H20N2, Application of N1,N2-Dibenzylethane-1,2-diamine.

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