Phosphorus, Sulfur, and Silicon and the Related Elements最新文献

The amino-functionalized SBA-15 silicon carrier (PMO-pr-NH₂) was prepared by the one-pot method, and then HKUST-1 functional composites were synthesized by adsorption combined with in-situ preparation technology (HKUST-1@PMO-pr-NH₂). A series of characterization techniques were used to analyze composites, such as BET, FTIR, TEM, XPS, TG, SEM, and XRD. The analysis showed that HKUST-1 was successfully prepared in the pores of the PMO-pr-NH₂ silicon-based carrier. The catalytic reduction activity and thermal stability of the composite material were investigated using the reaction of 4-nitrophenol (4-NP) to 4-aminophenol (4-AP). After 4 cycles, the catalytic performance of the composites was maintained without any obvious change.

Visible light-mediated photocatalytic phosphorylation of α-bromostyrenes is described. The β-ketophosphine oxide derivatives were conveniently synthesized from α-bromostyrene derivatives, which are useful synthetic intermediates, using an inexpensive organic photocatalyst, Eosin Y.

Ionic liquids (ILs) have emerged as an environmentally friendly alternative to the volatile organic solvents. Though primarily used as solvents, ILs synthesized with specific desired chemical properties have gained significant attention in recent years due to their unique properties and versatile applications in various areas of chemical synthesis and beyond. The present review is aimed at exploring the synthetic methods for chalcogen (S, Se, Te) ionic liquids along with the study of their role as solvent, catalyst, reactant in various chemical reactions like oxidation reactions, hydrothiolation transformations etc., thus showing the contribution of ILs toward the development of sustainable organo-chalcogen chemistry.

In this study, we examined the efficiency of a new magnetic core-shell nanocomposite, Fe₃O₄@SiO₂@CS@POCl_2-x (NCP@ POCl_2-x), which carries POCl_2-x functional groups (where X can be 0, 1, or 2) on its surface. The nanocomposite was explored as a reagent for converting alcohols into alkyl halides using molecular bromine (Br₂) or iodine (I₂) as a model organic transformation. The conversion process demonstrated promising practical applications with ease of operation, and the pure product could be conveniently isolated through magnetic filtration, simplifying the synthesis process. The surface characteristics of the nanocomposite were thoroughly investigated using vibrating-sample magnetometer (VSM) spectrum analysis, field emission scanning electron microscopy (FESEM) images, and Fourier-transform infrared spectroscopy (FT-IR). TEM imaging also confirmed the core-shell structure of the nanocomposite, and XRD analysis revealed distinct peaks corresponding to the presence of Fe₃O₄. The study demonstrates that NCP@ POCl_2-x is an effective reagent for alkyl halide transformations, offering various possibilities for applications in organic synthesis.

This study reports the synthesis and structural characterization of a series of novel acetamide-derived compounds containing a methylsulfonyl unit. The in vitro antibacterial activity results demonstrated that compound 2-((4-fluorophenyl)sulfonyl)-N-(4-(methylsulfonyl)phenyl)acetamide (6b) exhibited superior antibacterial activities against Xanthomonas oryzae pv. oryzicolaby (Xoc), Xanthomonas oryzae pv. oryzae (Xoo), and Xanthomonas axonopodis pv. citri (Xac) at 100 μg/mL concentration, with the inhibition rates of 86.24%, 81.59%, and 75.65%, respectively, compared to Bismerthiazol and Thiodiazole copper. Meanwhile, the in vitro antifungal activities of all target compounds were found to be lower against Mucor fragilis (M. fragilis), Mucor bainieri (M. bainieri), and Trichoderma atroviride (T. atroviride) at 50 μg/mL concentration, with the inhibition rates of 0–45.21%, 0–30.24%, and 0–12.65%, respectively, compared to Carbendazim. Moreover, bioassay results of the target compounds against prostate cancer (PC3), hepatocellular carcinoma (HepG2), and leukemia (K562) cells at 10 μM concentration demonstrated that, compared to 5-fluorouracil, compound 2-((4-fluorophenyl)thio)-N-(4-(methylsulfonyl)phenyl)acetamide (4c) illustrated obvious antitumor activity (56.87%) against K562. This work first highlights the effect of the modification of the acetamide-derived compounds bearing a methylsulfonyl unit on the bioactivity evaluation.

In the current study, a series of 1,3,4-oxadiazole and 1,2,4-triazole derivatives linked to quinazolinone were designed and synthesized by using Phase Transfer Catalysis. The structures of the synthesized compounds were confirmed by their IR, ¹H NMR, ¹³C NMR, and HR-ESI-MS spectroscopic data, and their in vitro antiproliferative activities against A549, Hela, MCF-7 as well as L929 were detected by using CCK-8 assay. The results demonstrated that most of the compounds showed better growth inhibitory effect than 5-FU on A549, Hela, and MCF-7 cell lines. Especially, 2-(5-((3-bromophenyl)thio)-1,3,4-oxadiazole-2-yl)quinazolin-4(3H)-one (8o), 4-amino-5-((4-nitrophenyl)thio)-4H-1,2,4-triazol-3-yl)quinazolin-4(3H)-one (9m) and 2-(4-amino-5-(o-tolylthio)-4H-1,2,4-triazol-3-yl)quinazolin-4(3H)-one (9b) showed good antiproliferative activity against A549 cells with IC₅₀ value of 3.46, 2.96, and 3.44 μM, respectively. 2-(4-Amino-5-((3,5-difluorophenyl)thio)-4H-1,2,4-triazol-3-yl)quinazolin-4(3H)-one (9h) and 4-amino-5-((4-nitrophenyl)thio)-4H-1,2,4-triazol-3-yl)quinazolin-4(3H)-one (9m) had obvious inhibitory effects on Hela cells with IC₅₀ values of 1.76 and 3.91 μM, respectively. 2-(4-Amino-5-((2-chlorophenyl)thio)-4H-1,2,4-triazol-3-yl)quinazolin-4(3H)-one (9i) showed high inhibitory activity against MCF-7 cells with IC₅₀ value of 2.72 μM. Meanwhile, all compounds showed lower cytotoxicity to L929 cells than positive control drug 5-FU. In development, according to the above preliminary observation, these novel quinazolinones incorporating 1,3,4-oxadiazole and 1,2,4-triazole thioether moieties could become potential molecular templates for searching new antitumor agents.

In this study, the content and calculation equations of each substance in diamond wire saw silicon powder (DWSSP) were determined. Initially, the presence of amorphous SiO₂ was proven by crystal transformation. Then, the SiO₂ content was determined by SiO₂-CaO phase diagram analysis, and the SiO_x content was determined by using the oxygen conservation rule. The variation trend between the SiO₂, SiO_x, and Si contents and the O content was determined, according to the calculated SiO₂ and SiO_x content. In addition, linear fitting was performed on the SiO₂, SiO_x, and Si contents of five DWSSP raw materials, and a calculation equation for SiO₂, SiO_x, and Si was obtained through the total O content. The three-layer structure of DWSSP was revealed, the DWSSP consisting of a Si core, an intermediate SiO_x layer, and a SiO₂ shell. This study can accurately identify the content of SiO₂, SiO_x, and Si in DWSSP based on the detected oxygen content, and provide a better theoretical basis for the process selection and design for silicon recovery or high value materials preparation.

A simple one-pot preparation of (2,4,6-Trimethylbenzoyl)diphenylphosphine oxide (TPO) by employing the low-cost triphenylphosphine oxide (Ph₃PO) as the starting material was described. Reaction with trimethylsilyl chloride (TMSCl) that transforms the intermediate sodium diphenylphosphonite (Ph₂PONa) into (trimethylsilyl)oxy)diphenylphosphine (Ph₂POTMS) is the key for the high yield of TPO. The reactions of Ph₂PONa with other silyl chlorides are discussed.

(2-Methyl-3-oxoisoindolin-1-yl)triphenylphosphonium tetrafluoroborate has been successfully synthesized from Ph₃PHBF₄ and 3-hydroxy-2-methylisoindolin-1-one. It undergoes smoothly Wittig olefination with a variety of aldehydes when using DBU or t-BuOK as a base to furnish 3-(alkylidene)-2-methyisoindolin-1-ones in 35–93% yields with the stereoselectivity being mostly favorable to (E)-isomer.