Month: December 2022

Guo, Huichuang published the artcile1,3,4,6-Tetrachloroglycoluril (TCGV) mediated isothiocyanation of phosphites, phosphonites and phosphinites, Category: catalysis-chemistry, the publication is Phosphorus, Sulfur and Silicon and the Related Elements, database is CAplus.

A universal and facile organocatalytic isothiocyanation protocol of P(O)H functionality with inorganic thiocyanides mediated by 30% equimolar 1,3,4,6-tetrachloroglycoluril (TCGV) was developed for the preparation of the corresponding phosphoroisothiocyanates, phosphonoisothiocyanates and phosphinoisothiocyanates. P(O)Cl was found to be the intermediate in situ formed in the reaction.

Phosphorus, Sulfur and Silicon and the Related Elements published new progress about 23897-16-7. 23897-16-7 belongs to catalysis-chemistry, auxiliary class Aryl phosphine ligand,Mono-phosphine Ligands, name is Dimesitylphosphine oxide, and the molecular formula is C18H23OP, Category: catalysis-chemistry.

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

Wu, Xiaopeng published the artcileNickel-catalyzed Thioester Transfer Reaction with sp²-Hybridized Electrophiles, Quality Control of 118-90-1, the publication is Journal of Organic Chemistry (2022), 87(15), 10003-10017, database is CAplus and MEDLINE.

Authors report a thioacylation transfer reaction based on nickel-catalyzed C-C bond cleavage of thioesters with sp²-hybridized electrophiles. Aryl bromides, iodides, and alkenyl triflates can participate in thioester transfer reaction of aryl thioesters, affording a wide range of structurally diverse new thioesters in yields of up to 98% under mild reaction conditions. With this protocol, it is possible to construct alkenyl thioesters from the corresponding ketones through the generation of alkenyl triflates.

Journal of Organic Chemistry 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 C9H12O, Quality Control of 118-90-1.

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

Li, Yiping published the artcileNDTP mediated direct rapid amide and peptide synthesis without epimerization, Recommanded Product: Fmoc-Pro-OH, the publication is Organic Letters (2022), 24(5), 1169-1174, database is CAplus and MEDLINE.

Herein, we explored an unprecedented mild, nonirritating, conveniently available, and recyclable coupling reagent NDTP, which could activate the carboxylic acids via acyl thiocyanide and enable the rapid amide and peptide synthesis at very mild conditions. In addition, the methodol. was compatible with Fmoc-SPPS (Fmoc = 9-flluorenylmethoxycarbonyl), which may provide an alternative to peptide manufacturing

Organic Letters published new progress about 71989-31-6. 71989-31-6 belongs to catalysis-chemistry, auxiliary class Amino acide derivatives,pyrrolidine, name is Fmoc-Pro-OH, and the molecular formula is C20H19NO4, Recommanded Product: Fmoc-Pro-OH.

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

Lu, Yufei published the artcileSynthesis of chiral ¦Ã-lactones via a RuPHOX-Ru catalyzed asymmetric hydrogenation of aroylacrylic acids, Related Products of catalysis-chemistry, the publication is Tetrahedron (2019), 75(26), 3643-3649, database is CAplus.

An asym. hydrogenation of aroylacrylic acids RCOCH:CHCO₂H (R = Ph, 2-MeOC₆H₄, 4-FC₆H₄, 3,4-F₂C₆H₃, etc.) catalyzed by RuPHOX-Ru catalyst has been developed, affording the corresponding chiral ¦Ã-lactones I in high yields and with up to 93% ee. The methodol. has the advantage of utilizing easily accessible substrates and has therefore expanded the scope of the resulting chiral ¦Ã-lactones. Furthermore, high catalytic efficiency was achieved in that the reduction of both the C=C and C=O double bonds was achieved in one step. The current work provides an alternative and convenient pathway for the synthesis of a wide range of chiral ¦Ã-lactones.

Tetrahedron 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 C10H10O3, Related Products of catalysis-chemistry.

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

Huang, Yuying published the artcileComprehensive analysis of complete chloroplast genome and phylogenetic aspects of ten Ficus species, Name: (S)-2-Amino-4-(methylthio)butanoic acid, the publication is BMC Plant Biology (2022), 22(1), 253, database is CAplus and MEDLINE.

The large genus Ficus comprises approx. 800 species, most of which possess high ornamental and ecol. values. However, its evolutionary history remains largely unknown. Plastome (chloroplast genome) anal. had become an essential tool for species identification and for unveiling evolutionary relationships between species, genus and other rank groups. In this work we present the plastomes of ten Ficus species. The complete chloroplast (CP) genomes of eleven Ficus specimens belonging to ten species were determined and analyzed. The full length of the Ficus plastome was nearly 160 kbp with a similar overall GC content, ranging from 35.88 to 36.02%. A total of 114 unique genes, distributed in 80 protein-coding genes, 30 tRNAs, and 4 rRNAs, were annotated in each of the Ficus CP genome. In addition, these CP genomes showed variation in their inverted repeat regions (IR). Tandem repeats and mononucleotide simple sequence repeat (SSR) are widely distributed across the Ficus CP genome. Comparative genome anal. showed low sequence variability. In addition, eight variable regions to be used as potential mol. markers were proposed for future Ficus species identification. According to the phylogenetic anal., these ten Ficus species were clustered together and further divided into three clades based on different subgenera. Simultaneously, it also showed the relatedness between Ficus and Morus. The chloroplast genome structure of 10 Ficus species was similar to that of other angiosperms, with a typical four-part structure. Chloroplast genome sizes vary slightly due to expansion and contraction of the IR region. And the variation of noncoding regions of the chloroplast genome is larger than that of coding regions. Phylogenetic anal. showed that these eleven sampled CP genomes were divided into three clades, clustered with species from subgenus Urostigma, Sycomorus, and Ficus, resp. These results support the Berg classification system, in which the subgenus Ficus was further decomposed into the subgenus Sycomorus. In general, the sequencing and anal. of Ficus plastomes, especially the ones of species with no or limited sequences available yet, contribute to the study of genetic diversity and species evolution of Ficus, while providing useful information for taxonomic and phylogenetic studies of Ficus.

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, Name: (S)-2-Amino-4-(methylthio)butanoic acid.

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

Yang, Zan published the artcileFe(III)/Pyridine-Mediated Decarboxylative Nitration of ¦Á,¦Â-Unsaturated Acids with Iron Nitrate, Recommanded Product: (E)-3-(3-Nitrophenyl)acrylic acid, the publication is Synlett (2017), 28(9), 1079-1082, database is CAplus.

A novel and efficient method for the synthesis of (E)-nitroolefins in moderate to excellent yields is developed by Fe(III)/pyridine-mediated decarboxylative nitration of ¦Á,¦Â-unsaturated acids with iron nitrate. A series of ¦Á,¦Â-unsaturated acids are well tolerated in this procedure.

Synlett published new progress about 1772-76-5. 1772-76-5 belongs to catalysis-chemistry, auxiliary class Benzenes, name is (E)-3-(3-Nitrophenyl)acrylic acid, and the molecular formula is C18H26ClN3O, Recommanded Product: (E)-3-(3-Nitrophenyl)acrylic acid.

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

Xu, Dan published the artcileSelective oxidation of alcohols to high value-added carbonyl compounds using air over Co-Co₃O₄@NC catalysts, HPLC of Formula: 118-90-1, the publication is Chemical Engineering Journal (Amsterdam, Netherlands) (2022), 134545, database is CAplus.

The sustainable catalytic transformation of alcs. to high value-added fine chems. is a significant and challenging research topic. Herein, a set of nitrogen-doped carbon encapsulated Co-based catalysts (Co-Co₃O₄@NC-T) were prepared by using low-cost dicyandiamide, glyoxal and cobalt nitrate as precursors. The obtained catalysts were utilized for the selective oxidation of alcs. to high value-added esters and carboxylic acids with air as the oxygen source and displayed wide applicability for the oxidation of both aromatic and aliphatic alcs. Based on the controlled experiments, the protective effect of N-doped carbon structure and the synergistic effect between Co core and Co₃O₄ species guaranteed the high reaction conversion and selectivity. Benefitting from heterogeneity and magnetism of the catalyst, it can be easily recycled and reused for long-term stability. Reasonable mechanisms of selective oxidation reaction were proposed through EPR anal. and controlled experiments The present work provides a facile strategy for potential large-scale preparation of heterogeneous catalyst for sustainable and green catalytic transformations.

Chemical Engineering Journal (Amsterdam, Netherlands) 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 C19H21N, HPLC of Formula: 118-90-1.

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

Jiang, Bing published the artcileSelective Oxidative Cleavage of the C-C Bond in ¦Á,¦Â-Epoxy Ketone into Carbonyl Compounds, Name: 2-Methylbenzoic acid, the publication is ACS Omega (2022), 7(25), 21608-21614, database is CAplus and MEDLINE.

This method afforded aromatic carbonyl compounds under TBHP via selective oxidative cleavage of the C-C bond in ¦Á,¦Â-epoxy ketones. Aromatic acid came from the aroyl section, and aromatic aldehyde came from the other aromatic group. TBHP acted as a free radical initiator and oxidant. The reaction within the solvent went through a ring-opening addition, cleavage of the C-C bond in the ethylene oxide section, and oxidation, affording the target compounds in moderate to good yields. The HPLC yield of aromatic aldehyde was up to 91%. The HPLC yield of aromatic acid was up to 99%. The reaction under solvent-free conditions gave two kinds of aromatic acids coming from different moieties of ¦Á,¦Â-epoxy ketone via the further oxidation of aromatic aldehyde. The substituent effect was discussed, and the reaction mechanism was proposed. This method allowed the reaction to occur in a simple system metal-free.

ACS Omega 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, Name: 2-Methylbenzoic acid.

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

Song, Li-Rui published the artcileMetal-free hypervalent iodine-promoted tandem carbonyl migration and unactivated C(Ph)-C(Alkyl) bond cleavage for quinolone scaffold synthesis, HPLC of Formula: 118-90-1, the publication is Chemical Communications (Cambridge, United Kingdom) (2022), 58(60), 8340-8343, database is CAplus and MEDLINE.

An unexpected iodine(III)-mediated C(sp³)-C(sp²) bond cleavage of 3-(methylamino)-2-(2-substitutedbenzoyl)acrylates 2-R-3-R¹-4- R²-5-R³C₆HC(O)C(C(O)OEt)=CHNHR⁴ (R = H, Me, Ph, 2-(naphthalen-2-yl)ethyl, etc.; R¹ = H, Me, OMe, NO₂, etc.; R² = H, Me, Br, NO₂, etc.; R³ = H, Me; R⁴ = Et, Bn, Me, i-pr) for efficient synthesis of privileged scaffold 4-quinolones I was described. Notably, a wide range of alkyl groups (e.g. Me, tert-Bu or alkyl chain) can be conveniently cleaved in this system. The detailed mechanism studies revealed that the transformation proceeded through cascade ipso-cyclization and 1,2-carbonyl migration, and the smaller bond energy determined ortho C-C bond cleavage rather than C-H bond cleavage, via an enamine radical intermediate.

Chemical Communications (Cambridge, United Kingdom) 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 C12H15BBrFO2, HPLC of Formula: 118-90-1.

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

Chen, Xue-Mei published the artcilePrediction of ^?OH-Initiated and ^?NO₃-Initiated Transformation Products of Polycyclic Aromatic Hydrocarbons by Electronic Structure Approaches, SDS of cas: 191-07-1, the publication is ACS Omega (2022), 7(29), 24942-24950, database is CAplus and MEDLINE.

The abiotic reaction products of polycyclic aromatic hydrocarbons (PAHs) with hydroxyl radicals (^?OH) and nitrate radicals (^?NO₃) are nitro-, oxygen-, and hydroxyl-containing PAHs (NPAHs, OPAHs, and OHPAHs). Four methods of the HOMO ), Fukui function (FF), dual descriptor (DD), and population of ¦Ð electrons (PP-¦Ð) are selected to predict the chem. reactivity of PAHs attacked by ^?OH and ^?NO₃ in this study. The predicted ^?OH-initiated and ^?NO₃-initiated transformation products are compared with the main PAH transformation products (PAH-TPs) observed in the laboratory The results indicate that PP-¦Ð and DD approaches fail to predict the transformation products of fused PAHs containing five-membered rings. By predicting the PAH-TPs of 13-14 out of the 15 parent PAHs accurately, HOMO and FF methods were shown to be suitable for predicting the transformation products formed from the abiotic reactions of fused PAHs with ^?OH and ^?NO₃.

ACS Omega published new progress about 191-07-1. 191-07-1 belongs to catalysis-chemistry, auxiliary class Electronic Materials, name is Coronene, and the molecular formula is C24H12, SDS of cas: 191-07-1.

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