Catalysis-chemistry

Gong, Pei-Xue published the artcileIron-catalyzed domino decarboxylation-oxidation of ¦Á,¦Â-unsaturated carboxylic acids enabled aldehyde C-H methylation, HPLC of Formula: 1772-76-5, the publication is Chemical Communications (Cambridge, United Kingdom) (2021), 57(48), 5905-5908, database is CAplus and MEDLINE.

A practical and general iron-catalyzed domino decarboxylation-oxidation of ¦Á,¦Â-unsaturated carboxylic acids enabling aldehyde C-H methylation for the synthesis of Me ketones has been developed. This mild, operationally simple method uses ambient air as the sole oxidant and tolerates sensitive functional groups for the late-stage functionalization of complex natural-product-derived and polyfunctionalized mols.

Chemical Communications (Cambridge, United Kingdom) 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 C9H7NO4, HPLC of Formula: 1772-76-5.

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

Yang, Zhi published the artcileEffects of dietary vitamin E supplementation levels on growth performance, breast muscle meat quality characteristics, and fatty acid composition of geese, Recommanded Product: Docosahexaenoic Acid, the publication is Journal of Food Science (2022), 87(8), 3396-3406, database is CAplus and MEDLINE.

This study investigated the effects of dietary supplementation with vitamin E (VE) on the growth performance, breast muscle quality, fatty acid (FA) composition, and muscle fiber characteristics of geese. In the present study, a total of 240 healthy 29-day-old male Jiangnan white geese were randomly divided into six exptl. groups, with five replicates in each group and eight geese in each replicate. Group A, the control group, was fed a basal diet; Groups B, C, D, E, and F were fed diets supplemented with 5, 10, 20, 40, and 80 mg/kg VE. After feeding for 70 days of age, one gosling from each replicate was randomly selected and slaughtered to assess the breast muscle quality characteristics, lipid oxidation, FA composition, and muscle fiber characteristics. The results showed that dietary VE supplementation did not significantly affect the growth performance, breast muscle quality characteristics, or muscle fiber characteristics of geese (p > 0.05). Dietary supplementation with 20, 40, and 80 mg/kg VE significantly decreased the malondialdehyde (MDA) content of the breast muscle compared with the control group (P < 0.05). Dietary supplementation with 40 and 80 mg/kg VE significantly increased the retention of ¦Á-tocopherol in pectoral muscle, decreased polyunsaturated fatty acid (PUFA) oxidation, and increased the proportion of n-3 PUFAs (p < 0.05). In conclusion, dietary supplementation with 5-80 mg/kg VE to the basal diet (VE content of the basal diet: 17.53 mg/kg) had no significant effect on the growth performance of geese. However, dietary supplementation with 40-80 mg VE increased the retention of ¦Á-tocopherol in breast muscle tissue, reduced the oxidation of PUFAs, and increased the content of n-3 PUFAs. Thus, under these exptl. conditions, dietary supplementation with 40-80 mg/kg VE is recommended, which is beneficial to human health. Appropriate supplementation of VE could increase meat quality and the beneficial components in breast muscle of geese. It provides a theor. basis for future production of high-quality goose meat.

Journal of Food Science published new progress about 6217-54-5. 6217-54-5 belongs to catalysis-chemistry, auxiliary class Alkenyl,Carboxylic acid,Aliphatic hydrocarbon chain,Metabolic Enzyme,RAR/RXR,Natural product, name is Docosahexaenoic Acid, and the molecular formula is C3H8N2S, Recommanded Product: Docosahexaenoic Acid.

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

Jin, Wen Bin published the artcileBioisosteric investigation of ebselen: Synthesis and in vitro characterization of 1,2-benzisothiazol-3(2H)-one derivatives as potent New Delhi metallo-¦Â-lactamase inhibitors, Name: 2,2′-Dithiodibenzoic acid, the publication is Bioorganic Chemistry (2020), 103873, database is CAplus and MEDLINE.

In the present study, by employing the concept of bioisosteric replacement of the selenium moiety of ebselen, a small compound library of 2-substituted 1,2-benzisothiazol-3(2H)-ones, compounds I [R = 4-lCC₆H₄, 4-HOCH₂C₆H₄, cyclohexyl, etc.] were designed, synthesized and evaluated their cytotoxicity and synergistic activity in combination with meropenem against the E. coli Tg1 (NDM-1) strain. The most promising compound I [R = 4-lCC₆H₄] demonstrated potent synergistic activity against a panel of clin. isolated NDM-1 pos. CRE strains with FICI as low as 0.09. Moreover, its IC₅₀ value and inhibition mechanism were also confirmed by using the enzyme inhibition assay and the ESI-MS anal. resp. Importantly, compound I [R = 4-lCC₆H₄] has acceptable toxicity and is not a PAINS. Because of its structural simplicity and potent synergistic activity in combination with meropenem, we propose that compound 3a may be a promising meropenem adjuvant and a new series of such compounds may worth further investigations.

Bioorganic Chemistry published new progress about 119-80-2. 119-80-2 belongs to catalysis-chemistry, auxiliary class sulfides,Carboxylic acid,Benzene, name is 2,2′-Dithiodibenzoic acid, and the molecular formula is C14H10O4S2, Name: 2,2′-Dithiodibenzoic acid.

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

Wang, Xiao-Xia published the artcileN-heterocyclic carbene-palladium(II)-1-methylimidazole complex-catalyzed Suzuki-Miyaura coupling of benzyl sulfonates with arylboronic acids, Application of Bis(4-fluorophenyl)methane, the publication is Organic & Biomolecular Chemistry (2015), 13(17), 4925-4930, database is CAplus and MEDLINE.

The first example of palladium-catalyzed Suzuki-Miyaura coupling between benzyl sulfonates and arylboronic acids was reported in this paper. In the presence of a well-defined, air-stable and easily available NHC-Pd(II)-Im complex, all reactions worked well to give the desired products in good to almost quant. yields under the optimal conditions. Electron-rich, -neutral, -poor and sterically-hindered substituents on both substrates are tolerated in such transformation, providing a convenient, efficient and alternative method for the synthesis of diarylmethanes.

Organic & Biomolecular 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 C25H47NO8, Application of Bis(4-fluorophenyl)methane.

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

Jiang, Qing published the artcileCopper-Catalyzed Aerobic Decarboxylative Sulfonylation of Cinnamic Acids with Sodium Sulfinates: Stereospecific Synthesis of (E)-Alkenyl Sulfones, HPLC of Formula: 1772-76-5, the publication is Journal of Organic Chemistry (2014), 79(16), 7372-7379, database is CAplus and MEDLINE.

A copper-catalyzed aerobic decarboxylative sulfonylation of alkenyl carboxylic acids with sodium sulfinates is developed. This study offers a new and expedient strategy for stereoselective synthesis of (E)-alkenyl sulfones that are widely present in biol. active natural products and therapeutic agents. Moreover, the transformation is proposed to proceed via a radical process and exhibits a broad substrate scope and good functional group tolerance.

Journal of Organic Chemistry 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 C9H7NO4, HPLC of Formula: 1772-76-5.

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

Xu, Liang published the artcileA novel method for selective recovery of indium from end-of-life liquid crystal displays by 15-crown-5 ether and its derivatives, Formula: C10H10O6, the publication is Hydrometallurgy (2021), 105601, database is CAplus.

The present study has proposed a promising liquid-liquid extraction system using novel extractants of 15-crown-5 (15C5), benzo-15-crown-5 (B15C5), and thia-benzo-15-crown-5 (TB15C5) for selective indium recovery from end-of-life liquid crystal displays (LCDs) leaching solution The focus was placed on the selectivity of the crown ethers toward In³⁺ over the most competing ion of Sn²⁺. The mol. design of the crown ethers and their complexations with In³⁺ were theor. evaluated through d. functional theory (DFT) modeling from the perspectives of geometrical structure, electrostatic potential, independent gradient model, MO and thermodn. anal. The results show that the complexation affinity of the crown ethers toward In³⁺ is in the order of 15C5 > B15C5 > TB15C5. On the basis of the theor. anal., the target crown ethers of 15C5, B15C5, and TB15C5 were synthesized and the corresponding solvent extraction experiments were carried out. The exptl. results are in excellent agreement with the theor. evaluations that 15C5 has the best selectivity to In³⁺ over Sn²⁺ among the three crown ethers with the separation coefficient being 5.5, which is followed by 4.1 for B15C5 and 1.6 for TB15C5.

Hydrometallurgy 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 C20H18BrN3, Formula: C10H10O6.

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

Ye, Xinhai published the artcileGenome of the parasitoid wasp Cotesia chilonis sheds light on amino acid resource exploitation, SDS of cas: 63-68-3, the publication is BMC Biology (2022), 20(1), 118, database is CAplus and MEDLINE.

A fundamental feature of parasitism is the nutritional exploitation of host organisms by their parasites. Parasitoid wasps lay eggs on arthropod hosts, exploiting them for nutrition to support larval development by using diverse effectors aimed at regulating host metabolism However, the genetic components and mol. mechanisms at the basis of such exploitation, especially the utilization of host amino acid resources, remain largely unknown. To address this question, here, we present a chromosome-level genome assembly of the parasitoid wasp Cotesia chilonis and reconstruct its amino acid biosynthetic pathway. Analyses of the amino acid synthetic pathway indicate that C. chilonis lost the ability to synthesize ten amino acids, which was confirmed by feeding experiments with amino acid-depleted media. Of the ten pathways, nine are known to have been lost in the common ancestor of animals. We find that the ability to synthesize arginine was also lost in C. chilonis because of the absence of two key genes in the arginine synthesis pathway. Further analyses of the genomes of 72 arthropods species show that the loss of arginine synthesis is common in arthropods. Metabolomic analyses by UPLC-MS/MS reveal that the temporal concentrations of arginine, serine, tyrosine, and alanine are significantly higher in host (Chilo suppressalis) hemolymph at 3 days after parasitism, whereas the temporal levels of 5-hydroxylysine, glutamic acid, methionine, and lysine are significantly lower. We sequence the transcriptomes of a parasitized host and non-parasitized control. Differential gene expression analyses using these transcriptomes indicate that parasitoid wasps inhibit amino acid utilization and activate protein degradation in the host, likely resulting in the increase of amino acid content in host hemolymph. We sequenced the genome of a parasitoid wasp, C. chilonis, and revealed the features of trait loss in amino acid biosynthesis. Our work provides new insights into amino acid exploitation by parasitoid wasps, and this knowledge can specifically be used to design parasitoid artificial diets that potentially benefit mass rearing of parasitoids for pest control.

BMC 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 C8H10BNO3, SDS of cas: 63-68-3.

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

Du, Guang-Fen published the artcileN-heterocyclic carbene-catalyzed pentafluorophenylation of aldehydes, Name: Trimethyl(perfluorophenyl)silane, the publication is RSC Advances (2015), 5(45), 35513-35517, database is CAplus.

The use of N-heterocyclic carbenes as highly efficient organocatalysts to catalyze multifluorophenylation of aldehydes with pentafluorophenyltrimethylsilane or bis(trimethylsilyl)tetrafluorobenzene to afford the corresponding fluorinated adducts in 49-99% yields was reported.

RSC Advances 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, Name: Trimethyl(perfluorophenyl)silane.

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

Huang, Meng-meng published the artcileIdentification of six novel microalgal strains and characterization of its potential for development of high-value compounds, Synthetic Route of 6217-54-5, the publication is South African Journal of Botany (2022), 1-7, database is CAplus.

In this study, six microalgae strains were isolated from samples collected in alpine regions, identified by 18S rRNA and rbcL gene sequencing, and assessed for their ability to produce biodiesel and high-value compounds The six strains were isolated from three alpine regions (Daqing, Zhaodong and Zhalong Salt Lake). Phylogenetic neighbor-joining anal. indicated that the strains designated as HDA01, HDA04, and HDA07 belong to the genus Chlorella sp., HDA03 to the genus Scenedesmus sp., HDA05 to the genus Micractinium sp., and HDA06 to the genus Desmodesmus sp. Biomass productivity, lipid yield, fatty acid profiles and other indexes were evaluated to assess whether these strains have potential applications. Chlorella sp. HDA04 has potential as a biodiesel producer, based on its high biomass productivity (3.95¡À0.05 gL-1), high lipid productivity (472.99¡À18.97 mg L-1d-1), and its fatty acid profiles which meets European standards for biodiesel. HDA07 accumulates a high ¦Á-linolenic acid (ALA) content (26.12% of total lipids), which makes this strain potentially suitable for production of this high-value product.

South African Journal of Botany published new progress about 6217-54-5. 6217-54-5 belongs to catalysis-chemistry, auxiliary class Alkenyl,Carboxylic acid,Aliphatic hydrocarbon chain,Metabolic Enzyme,RAR/RXR,Natural product, name is Docosahexaenoic Acid, and the molecular formula is C22H32O2, Synthetic Route of 6217-54-5.

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