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Metal-free, photoredox-catalyzed aromatization-driven deconstructive functionalization of spiro-dihydroquinazolinones with α-CF3 alkenes. 无金属、光氧化催化芳香化驱动的螺二氢喹唑啉酮与α-CF3 烯的解构官能化。
IF 4.3 2区 化学 Q2 CHEMISTRY, MULTIDISCIPLINARY Pub Date : 2024-07-12 DOI: 10.1039/d4cc02868f
Jin-Hua Zhang, Hong-Jie Miao, Jia-Yi Li, Wenke Li, Pengchen Ma, Xin-Hua Duan, Li-Na Guo

Metal-free, photoredox-catalyzed aromatization-driven deconstructive functionalization of spiro-dihydroquinazolinones with α-CF3 alkenes is presented. The readily available spiro-dihydroquinazolinones reacted efficiently with α-CF3 alkenes during photocatalysis to give the gem-difluoroallylated and the CF3-containing quinazolin-4(3H)-ones in good yields with excellent chemoselectivity. The selectivity depends on the electron effect of substituents in α-CF3 alkenes. A wide range of four-, five-, six-, seven-, eight- and twelve-membered spiro-dihydroquinazolinones were compatible with this transformation. The protocol is also characterized by the mild and redox-neutral reaction conditions, good functional group compatibility and excellent atom economy. Mechanistic studies revealed that the reaction proceeds via a radical pathway.

本文介绍了无金属、光氧化催化芳香化驱动的螺二氢喹唑啉酮与α-CF3 烯的解构官能化。在光催化过程中,现成的螺二氢喹唑啉酮与α-CF3 烯烃发生了高效反应,生成了宝石-二氟烯丙基化和含有 CF3 的喹唑啉-4(3H)-酮,产率高,化学选择性极佳。选择性取决于 α-CF3 烯烃中取代基的电子效应。多种四元、五元、六元、七元、八元和十二元螺二氢喹唑啉酮都能与这种转化相容。该方案还具有反应条件温和、氧化还原中性、官能团兼容性好和原子经济性优异等特点。机理研究表明,反应是通过自由基途径进行的。
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引用次数: 0
Synthesis of 1-aryl-2,3-diaroyl cyclopropanes from 1,3,5-triaryl-1,5-diketones and their transformation into E,E-1,4-diaryl-1,3-butadienes† 从 1,3,5-三芳基-1,5-二酮合成 1-芳基-2,3-二芳基环丙烷并将其转化为 E,E-1,4-二芳基-1,3-丁二烯†。
IF 3.9 3区 化学 Q2 CHEMISTRY, MULTIDISCIPLINARY Pub Date : 2024-07-12 DOI: 10.1039/D4RA02525C
Kashpar John Britto, Maniarasu Meenakshi and Kannupal Srinivasan

A new method for the synthesis of 1-aryl-2,3-diaroyl cyclopropanes has been developed by iodine/DBU-mediated cyclization of 1,3,5-triaryl-1,5-diketones. The alcohols derived by the reduction of these cyclopropanes, when treated with conc. HCl, afforded a series of 1,3-dienes through cyclopropyl ring-opening and subsequent fragmentation. Overall, the synthetic sequence represents a new non-Wittig methodology for the synthesis of 1,3-dienes from 1,5-diketones.

通过碘/DBU 介导的 1,3,5-三芳基-1,5-二酮环化,开发了一种合成 1 芳基-2,3-二芳基环丙烷的新方法。通过还原这些环丙烷得到的醇,在用浓盐酸处理时,通过环丙基开环和随后的碎裂得到一系列 1,3-二烯。总之,该合成序列代表了一种从 1,5-二酮合成 1,3-二烯的非威蒂希新方法。
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引用次数: 0
Metal-free oxidative coupling of aryl acetylene with elemental sulphur and amines: facile access to α-ketothioamides. 芳基乙炔与元素硫和胺的无金属氧化偶联:轻松获得 α-硫代酮酰胺。
IF 2.9 3区 化学 Q1 CHEMISTRY, ORGANIC Pub Date : 2024-07-12 DOI: 10.1039/d4ob00830h
Deepika Sharma, Rana Chatterjee, Vasudevan Dhayalan, Rambabu Dandela

A simple and efficient oxidative coupling of aromatic alkynes with elemental sulphur and secondary amines has been reported. The iodine/DMSO system easily promoted the transformations, affording thioglyoxamides via C-S, C-O, and C-N bond formations. In this context, acetylenic C-H bond oxidation has occurred through iodination, leading to the desired products. Moreover, this metal-free, one-pot protocol is accomplished by using readily available starting materials, without external oxidants, and under aerobic conditions, providing a variety of α-ketothioamide compounds in moderate to good yields.

据报道,芳香炔与元素硫和仲胺的氧化偶联简单而高效。碘/二甲基亚砜体系可轻松促进转化,通过 C-S、C-O 和 C-N 键的形成产生硫代乙二胺。在这种情况下,乙炔基 C-H 键通过碘化发生氧化,从而得到所需的产物。此外,这种无金属、一锅制备的方法使用现成的起始材料,无需外加氧化剂,并在有氧条件下完成,能以中等至良好的产率提供各种α-硫代酮酰胺化合物。
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引用次数: 0
Synthesis, enzyme inhibition assay, and molecular modeling study of novel pyrazolines linked to 4-methylsulfonylphenyl scaffold: antitumor activity and cell cycle analysis† 与 4-甲基磺酰基苯基支架相连的新型吡唑类化合物的合成、酶抑制实验和分子模型研究:抗肿瘤活性和细胞周期分析†。
IF 3.9 3区 化学 Q2 CHEMISTRY, MULTIDISCIPLINARY Pub Date : 2024-07-12 DOI: 10.1039/D4RA03902E
Alaa A.-M. Abdel-Aziz, Adel S. El-Azab, Simone Brogi, Rezk R. Ayyad, Hamad M. Alkahtani, Hatem A. Abuelizz, Ibrahim A. Al-Suwaidan and Abdulrahman M. Al-Obaid

Antitumor activity using 59 cancer cell lines and enzyme inhibitory activity of a newly synthesized pyrazoline-linked 4-methylsulfonylphenyl scaffold (compounds 18a–q) were measured and compared with those of standard drugs. Pyrazolines 18b, 18c, 18f, 18g, 18h, and 18n possessed significant antitumor activity, with a positive cytotoxic effect (PCE) of 22/59, 21/59, 21/59, 48/59, 51/59, and 20/59, respectively. The cancer cell lines HL60, MCF-7, and MDA-MB-231 were used to measure the IC50 values of derivatives 18c, 18g, and 18h via the MTT assay method, and the results were compared with those of reference drugs. Derivatives 18g and 18h showed potent and broad-spectrum antitumor activities against HL60 (IC50 of 10.43, 8.99 μM, respectively), MCF-7 (IC50 of 11.7 and 12.4 μM, respectively), and MDA-MB-231 (IC50 of 4.07 and 7.18 μM, respectively). Compound 18c exhibited strong antitumor activity against HL60 and MDA-MB-231 cell lines with IC50 values of 8.43 and 12.54 μM, respectively, and moderate antitumor activity against MCF-7 cell lines with an IC50 value of 16.20 μM. Compounds 18c, 18g, and 18h remarkably inhibited VEGFR2 kinase (IC50 = 0.218, 0.168, and 0.135 μM, respectively) compared with the reference drug sorafenib (IC50 = 0.041 μM). Compounds 18g and 18h effectively inhibited HER2 kinase (IC50 = 0.496 and 0.253 μM, respectively) compared with erlotinib (IC50 = 0.085 μM). Compound 18h inhibited EGFR kinase (IC50 = 0.574 μM) with a potency comparable with that of the reference drug erlotinib (IC50 = 0.105 μM). Pyrazolines 18c, 18f, and 18h arrested the S/G2 phase of the cell cycle in HL-60 cells. In addition, derivatives 18c, 18f, and 18h revealed lower Bcl-2 protein expression anti-apoptotic levels and higher Bax, caspase-3, and caspase-9 expression levels. Molecular docking studies of derivative 18h into the binding sites of EGFR, HER2, and VEGFR2 kinases explored the interaction mode of these pyrazoline derivatives and their structural requirements for antitumor activity.

利用 59 种癌症细胞株测定了新合成的吡唑啉连接 4-甲磺酰基苯基支架(化合物 18a-q)的抗肿瘤活性和酶抑制活性,并将其与标准药物进行了比较。吡唑啉类化合物 18b、18c、18f、18g、18h 和 18n 具有显著的抗肿瘤活性,其阳性细胞毒性效应(PCE)分别为 22/59、21/59、21/59、48/59、51/59 和 20/59。采用 MTT 法测定了 18c、18g 和 18h 衍生物对 HL60、MCF-7 和 MDA-MB-231 癌细胞株的 IC50 值,并将结果与参考药物的 IC50 值进行了比较。衍生物 18g 和 18h 对 HL60(IC50 值分别为 10.43 和 8.99 μM)、MCF-7(IC50 值分别为 11.7 和 12.4 μM)和 MDA-MB-231 (IC50 值分别为 4.07 和 7.18 μM)具有强效和广谱的抗肿瘤活性。化合物 18c 对 HL60 和 MDA-MB-231 细胞株具有较强的抗肿瘤活性,IC50 值分别为 8.43 和 12.54 μM;对 MCF-7 细胞株具有中等抗肿瘤活性,IC50 值为 16.20 μM。与参考药物索拉非尼(IC50 = 0.041 μM)相比,化合物 18c、18g 和 18h 显著抑制 VEGFR2 激酶(IC50 = 0.218、0.168 和 0.135 μM)。与厄洛替尼(IC50 = 0.085 μM)相比,化合物 18g 和 18h 能有效抑制 HER2 激酶(IC50 = 0.496 和 0.253 μM)。化合物 18h 抑制表皮生长因子受体激酶(IC50 = 0.574 μM)的效力与参考药物厄洛替尼(IC50 = 0.105 μM)相当。吡唑类化合物 18c、18f 和 18h 阻止了 HL-60 细胞细胞周期的 S/G2 期。此外,衍生物 18c、18f 和 18h 显示出较低的 Bcl-2 蛋白表达抗凋亡水平和较高的 Bax、caspase-3 和 caspase-9 表达水平。衍生物 18h 与表皮生长因子受体、HER2 和血管内皮生长因子受体 2 激酶结合位点的分子对接研究探讨了这些吡唑啉衍生物的相互作用模式及其抗肿瘤活性的结构要求。
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引用次数: 0
Sonophotocatalytic degradation of sulfamethoxazole using lanthanum ferrite perovskite oxide anchored on an ultrasonically exfoliated porous graphitic carbon nitride nanosheet 利用锚定在超声剥离多孔氮化石墨碳纳米片上的镧系铁氧体过氧化物对磺胺甲噁唑进行声光催化降解
IF 3.9 3区 化学 Q2 CHEMISTRY, MULTIDISCIPLINARY Pub Date : 2024-07-12 DOI: 10.1039/D4RA03096F
Ajibola A. Bayode, Andrea Osti and Antonella Glisenti

The lanthanum ferrite perovskite (La0.8FO) was synthesized using a citric combustion route and then modified with a porous graphitic nitride nanosheet via the wet impregnation-assisted ultrasonic method to produce La0.8FO@PgNS. Various techniques such as Fourier transform infrared spectroscopy (FTIR), X-ray diffraction (XRD), scanning electron microscopy (SEM), energy dispersive X-ray (EDX) spectroscopy, X-ray photoelectron spectroscopy (XPS), ultraviolet diffuse reflectance spectroscopy (UV-DRS), and Tauc plot analysis were employed to confirm the functional moieties, crystallinity, phase change, morphology, composition, and bandgap of La.0.8FO and La0.8FO@PgNS. La0.8FO and La0.8FO@PgNS were used for the sonophotocatalytic oxidative degradation of sulfamethoxazole (SMX) under low energy and ultrasound wave frequency in the presence of visible light. La0.8FO and La0.8FO@PgNS exhibited a sonophotocatalytic degradation capacity of 52.06 and 99.60%, respectively. Furthermore, the rate constant at the optimum condition of pH 7 and 5 mg L−1 concentration was 0.01343 and 0.01494 min−1 for La0.8FO and La0.8FO@PgNS, respectively. The integration of sonolysis and photocatalysis in the remediation process of SMX resulted in a synergy of 2.5-fold. Ultrasonic waves and hydroxyl and superoxide radicals are the main species governing the degradation process while La0.8FO@PgNS was stable over 8 cycles, proving to be a sustainable material for environmental remediation.

采用柠檬燃烧法合成了镧系铁氧体包晶石(La0.8FO),然后通过湿法浸渍辅助超声波法用多孔氮化石墨纳米片对其进行改性,制备出了La0.8FO@PgNS。采用傅立叶变换红外光谱(FTIR)、X 射线衍射(XRD)、扫描电子显微镜(SEM)、能量色散 X 射线(EDX)光谱、X 射线光电子能谱(XPS)、紫外漫反射光谱(UV-DRS)和陶氏图分析等多种技术来确认 La.0.8FO 和 La0.8FO 的功能分子、结晶度、相变、形貌、成分和带隙。.8FO和La0.8FO@PgNS。将 La0.8FO 和 La0.8FO@PgNS 用于可见光存在下的低能量和超声波频率下磺胺甲噁唑(SMX)的声光催化氧化降解。La0.8FO 和 La0.8FO@PgNS 的声光催化降解能力分别为 52.06% 和 99.60%。此外,在 pH 值为 7、浓度为 5 mg L-1 的最佳条件下,La0.8FO 和 La0.8FO@PgNS 的速率常数分别为 0.01343 和 0.01494 min-1。将超声波溶解和光催化结合到 SMX 的修复过程中可产生 2.5 倍的协同效应。超声波、羟基自由基和超氧自由基是降解过程中的主要物质,而 La0.8FO@PgNS 在 8 个循环中保持稳定,证明它是一种可持续的环境修复材料。
{"title":"Sonophotocatalytic degradation of sulfamethoxazole using lanthanum ferrite perovskite oxide anchored on an ultrasonically exfoliated porous graphitic carbon nitride nanosheet","authors":"Ajibola A. Bayode, Andrea Osti and Antonella Glisenti","doi":"10.1039/D4RA03096F","DOIUrl":"https://doi.org/10.1039/D4RA03096F","url":null,"abstract":"<p >The lanthanum ferrite perovskite (La<small><sub>0.8</sub></small>FO) was synthesized using a citric combustion route and then modified with a porous graphitic nitride nanosheet <em>via</em> the wet impregnation-assisted ultrasonic method to produce La<small><sub>0</sub></small>.<small><sub>8</sub></small>FO@PgNS. Various techniques such as Fourier transform infrared spectroscopy (FTIR), X-ray diffraction (XRD), scanning electron microscopy (SEM), energy dispersive X-ray (EDX) spectroscopy, X-ray photoelectron spectroscopy (XPS), ultraviolet diffuse reflectance spectroscopy (UV-DRS), and Tauc plot analysis were employed to confirm the functional moieties, crystallinity, phase change, morphology, composition, and bandgap of La.<small><sub>0.8</sub></small>FO and La<small><sub>0</sub></small>.<small><sub>8</sub></small>FO@PgNS. La<small><sub>0.8</sub></small>FO and La<small><sub>0</sub></small>.<small><sub>8</sub></small>FO@PgNS were used for the sonophotocatalytic oxidative degradation of sulfamethoxazole (SMX) under low energy and ultrasound wave frequency in the presence of visible light. La<small><sub>0.8</sub></small>FO and La<small><sub>0</sub></small>.<small><sub>8</sub></small>FO@PgNS exhibited a sonophotocatalytic degradation capacity of 52.06 and 99.60%, respectively. Furthermore, the rate constant at the optimum condition of pH 7 and 5 mg L<small><sup>−1</sup></small> concentration was 0.01343 and 0.01494 min<small><sup>−1</sup></small> for La<small><sub>0.8</sub></small>FO and La<small><sub>0</sub></small>.<small><sub>8</sub></small>FO@PgNS, respectively. The integration of sonolysis and photocatalysis in the remediation process of SMX resulted in a synergy of 2.5-fold. Ultrasonic waves and hydroxyl and superoxide radicals are the main species governing the degradation process while La<small><sub>0</sub></small>.<small><sub>8</sub></small>FO@PgNS was stable over 8 cycles, proving to be a sustainable material for environmental remediation.</p>","PeriodicalId":102,"journal":{"name":"RSC Advances","volume":null,"pages":null},"PeriodicalIF":3.9,"publicationDate":"2024-07-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://pubs.rsc.org/en/content/articlepdf/2024/ra/d4ra03096f?page=search","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141602605","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Insights into structure, morphology and conductivity of the earth-abundant NASICON phosphate, Na4MnFe(PO4)3† 对富含地球的 NASICON 磷酸盐 Na4MnFe(PO4)3† 的结构、形态和导电性的深入研究
IF 3.9 3区 化学 Q2 CHEMISTRY, MULTIDISCIPLINARY Pub Date : 2024-07-12 DOI: 10.1039/D4RA03529A
Loubna Chayal, Sirine El Arni, Mohamed Saadi, Abderrazzak Assani, Lahcen Bih, Jiwei Ma and Mohammed Hadouchi

Phosphate-based NASICON materials are an excellent candidate for both electrode and solid electrolyte materials in sodium-ion batteries (SIBs). The development of new NASICON materials with higher ionic and electronic conductivities based on low cost and abundant elements is necessary for advancement of SIBs. In this study, we report the structure, morphology and conductivity of the earth-abundant Mn/Fe-based NASICON phosphate Na4MnFe(PO4)3. Pure phase powders were synthesized by solution-assisted solid-state reaction, sol–gel and Pechini methods. From refined X-ray diffraction data, the prepared phosphate was found to crystallize in trigonal symmetry with space group Rc. The effect of synthesis method on microstructure and conductivity was investigated using scanning electron microscopy (SEM), atomic force microscopy (AFM) and impedance measurements. Smaller particle size and regular distribution of the powder was designed using a Pechini route. Impedance measurement showed a notable enhancement in conductivity, from 0.543 × 10−7 to 1.52 × 10−7 S cm−1 at 30 °C, when the powder synthesis method was altered from a solution-assisted solid-state reaction to the Pechini route, highlighting the remarkable effect of the synthesis method on conductivity.

磷酸盐基 NASICON 材料是钠离子电池(SIB)电极和固体电解质材料的理想候选材料。开发基于低成本和丰富元素的具有更高离子和电子电导率的新型 NASICON 材料对于钠离子电池的发展十分必要。在本研究中,我们报告了富含锰/铁的 NASICON 磷酸盐 Na4MnFe(PO4)3 的结构、形态和导电性。纯相粉末是通过溶液辅助固态反应、溶胶-凝胶法和 Pechini 法合成的。从精制的 X 射线衍射数据来看,所制备的磷酸盐呈空间群为 Rc 的三棱对称结晶。利用扫描电子显微镜(SEM)、原子力显微镜(AFM)和阻抗测量法研究了合成方法对微观结构和电导率的影响。采用 Pechini 路线设计的粉末粒度更小,分布更均匀。阻抗测量显示,当粉末合成方法从溶液辅助固态反应改为 Pechini 路线时,电导率显著提高,在 30 °C 时从 0.543 × 10-7 提高到 1.52 × 10-7 S cm-1,突出表明了合成方法对电导率的显著影响。
{"title":"Insights into structure, morphology and conductivity of the earth-abundant NASICON phosphate, Na4MnFe(PO4)3†","authors":"Loubna Chayal, Sirine El Arni, Mohamed Saadi, Abderrazzak Assani, Lahcen Bih, Jiwei Ma and Mohammed Hadouchi","doi":"10.1039/D4RA03529A","DOIUrl":"https://doi.org/10.1039/D4RA03529A","url":null,"abstract":"<p >Phosphate-based NASICON materials are an excellent candidate for both electrode and solid electrolyte materials in sodium-ion batteries (SIBs). The development of new NASICON materials with higher ionic and electronic conductivities based on low cost and abundant elements is necessary for advancement of SIBs. In this study, we report the structure, morphology and conductivity of the earth-abundant Mn/Fe-based NASICON phosphate Na<small><sub>4</sub></small>MnFe(PO<small><sub>4</sub></small>)<small><sub>3</sub></small>. Pure phase powders were synthesized by solution-assisted solid-state reaction, sol–gel and Pechini methods. From refined X-ray diffraction data, the prepared phosphate was found to crystallize in trigonal symmetry with space group <em>R</em><img><em>c</em>. The effect of synthesis method on microstructure and conductivity was investigated using scanning electron microscopy (SEM), atomic force microscopy (AFM) and impedance measurements. Smaller particle size and regular distribution of the powder was designed using a Pechini route. Impedance measurement showed a notable enhancement in conductivity, from 0.543 × 10<small><sup>−7</sup></small> to 1.52 × 10<small><sup>−7</sup></small> S cm<small><sup>−1</sup></small> at 30 °C, when the powder synthesis method was altered from a solution-assisted solid-state reaction to the Pechini route, highlighting the remarkable effect of the synthesis method on conductivity.</p>","PeriodicalId":102,"journal":{"name":"RSC Advances","volume":null,"pages":null},"PeriodicalIF":3.9,"publicationDate":"2024-07-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://pubs.rsc.org/en/content/articlepdf/2024/ra/d4ra03529a?page=search","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141602621","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Removal and detection of phenols through an SPE-HPLC method using microporous organic networks as adsorbent. 使用微孔有机网络作为吸附剂,通过 SPE-HPLC 方法去除和检测苯酚。
IF 2.7 3区 化学 Q2 CHEMISTRY, ANALYTICAL Pub Date : 2024-07-12 DOI: 10.1039/d4ay00799a
Azam Ali, Huipeng Sun, Syed Faheem Askari Rizvi, Ding Nana, Haixia Zhang

The design and development of a facile synthesis approach to construct novel materials for the rapid adsorption and removal of environmental pollutants are of significant interest. In this work, we report the rational design and facile synthesis of magnetic core-shell-based microporous organic networks, Fe3O4@MON-TBPT-TEB (TTMON, achieved by reacting 2,4,6-tris(p-bromophenyl) triazine and 1,3,5-triethynylbenzene) and Fe3O4@MON-TBPM-DEBP (TDMON, achieved by reacting tetrakis (4-bromophenyl) methane and 4-4'-diethynylbiphenyl). These MONs possessed excellent dispersity, electrostatic attraction as well as plenty of π-π and hydrophobic interaction sites enabled them to efficiently absorb targeted environmental pollutants. TTMON and TDMON exhibited excellent adsorption capacities of 440 and 510 mg g-1, respectively, at 25 °C for 2,4,6-trichlorophenol (TCP). TCP, 2,4-dichlorophenol (DCP), 2-naphthol (2-NT) and 4-nitrophenol (4-NP) from aqueous solution were treated by both MONs, followed by their analysis with high-performance liquid chromatography (HPLC). For TDMON, the proposed SPE-HPLC-UV method showed an LOD of 0.03 μg L-1, LOQ of 0.11 μg L-1, and a wide linear range of 1-1000 μg L-1 for TCP. The adsorption kinetics, thermodynamics, isotherms, effect of pH and humic acid (HA), ionic strength, regeneration, and reusability of the MONs were also studied. The results revealed that the novel-designed MONs have potential applications as efficient adsorbents in sample pretreatment.

设计和开发一种简便的合成方法来构建快速吸附和去除环境污染物的新型材料具有重要意义。在这项工作中,我们报告了基于磁芯壳的微孔有机网络--Fe3O4@MON-TBPT-TEB(TTMON,由 2,4,6-三(对溴苯基)三嗪和 1,3,5-三乙炔基苯反应实现)和 Fe3O4@MON-TBPM-DEBP(TDMON,由四(4-溴苯基)甲烷和 4-4'-二乙炔基联苯反应实现)的合理设计和简便合成。这些 MONs 具有出色的分散性、静电吸引力以及大量的 π-π 和疏水相互作用位点,使它们能够有效地吸收目标环境污染物。25 °C 时,TTMON 和 TDMON 对 2,4,6-三氯苯酚(TCP)的吸附容量分别为 440 毫克/克和 510 毫克/克。用这两种 MON 处理水溶液中的 TCP、2,4-二氯苯酚(DCP)、2-萘酚(2-NT)和 4-硝基苯酚(4-NP),然后用高效液相色谱法(HPLC)进行分析。对于TDMON,所提出的SPE-HPLC-UV方法的LOD为0.03 μg L-1,LOQ为0.11 μg L-1,TCP的线性范围为1-1000 μg L-1。此外,还研究了 MONs 的吸附动力学、热力学、等温线、pH 值和腐植酸(HA)的影响、离子强度、再生和重复使用性。研究结果表明,设计新颖的 MONs 可作为高效吸附剂用于样品预处理。
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引用次数: 0
Synthesis and characterisation of copper(I) complexes with relevance to intramolecular Ullmann O,S-arylation. 与分子内乌尔曼 O,S-芳香化相关的铜(I)配合物的合成与表征。
IF 3.5 3区 化学 Q2 CHEMISTRY, INORGANIC & NUCLEAR Pub Date : 2024-07-12 DOI: 10.1039/d4dt01418a
Xiaodong Jin, Bao-Nguyen T Nguyen, Robert P Davies

Copper-catalysed intramolecular Ullman arylation has been frequently used to synthesise benzoxazoles and benzothiazoles. Despite widespread use, investigations into the mechanism and speciation of copper-containing complexes relevant to the catalytic pathway have remained relatively limited. Accordingly, this study aims to elucidate the structural details of potential copper(I) intermediates through the analysis of their solid-state structures using X-ray crystallography, while also investigating the reactivities of these complexes. Five novel copper complexes are reported which are formed prior to the aryl halide activation step and feature distinct aggregation modes based on either Cu4N4O4C4 or Cu4N4S4C4 clusters.

铜催化的分子内乌尔曼芳基化反应经常被用于合成苯并恶唑和苯并噻唑。尽管这种方法被广泛使用,但与催化途径相关的含铜复合物的机理和规格研究仍然相对有限。因此,本研究旨在利用 X 射线晶体学分析潜在铜(I)中间体的固态结构,从而阐明其结构细节,同时研究这些配合物的反应活性。本研究报告了五种新型铜配合物,这些配合物在芳基卤化物活化步骤之前形成,并以 Cu4N4O4C4 或 Cu4N4S4C4 团簇为基础,具有不同的聚集模式。
{"title":"Synthesis and characterisation of copper(I) complexes with relevance to intramolecular Ullmann <i>O</i>,<i>S</i>-arylation.","authors":"Xiaodong Jin, Bao-Nguyen T Nguyen, Robert P Davies","doi":"10.1039/d4dt01418a","DOIUrl":"https://doi.org/10.1039/d4dt01418a","url":null,"abstract":"<p><p>Copper-catalysed intramolecular Ullman arylation has been frequently used to synthesise benzoxazoles and benzothiazoles. Despite widespread use, investigations into the mechanism and speciation of copper-containing complexes relevant to the catalytic pathway have remained relatively limited. Accordingly, this study aims to elucidate the structural details of potential copper(I) intermediates through the analysis of their solid-state structures using X-ray crystallography, while also investigating the reactivities of these complexes. Five novel copper complexes are reported which are formed prior to the aryl halide activation step and feature distinct aggregation modes based on either Cu<sub>4</sub>N<sub>4</sub>O<sub>4</sub>C<sub>4</sub> or Cu<sub>4</sub>N<sub>4</sub>S<sub>4</sub>C<sub>4</sub> clusters.</p>","PeriodicalId":71,"journal":{"name":"Dalton Transactions","volume":null,"pages":null},"PeriodicalIF":3.5,"publicationDate":"2024-07-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141588951","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Correction: Synthesis, docking and biological evaluation of purine-5-N-isosteres as anti-inflammatory agents 更正:作为抗炎剂的嘌呤-5-N-异甾烷的合成、对接和生物学评价
IF 3.9 3区 化学 Q2 CHEMISTRY, MULTIDISCIPLINARY Pub Date : 2024-07-12 DOI: 10.1039/D4RA90072C
Ahmed M. El-Saghier, Souhaila S. Enaili, Aly Abdou, Amany M. Hamed and Asmaa M. Kadry

Correction for ‘Synthesis, docking and biological evaluation of purine-5-N-isosteres as anti-inflammatory agents’ by Ahmed M. El-Saghier et al., RSC Adv., 2024, 14, 17785–17800, https://doi.org/10.1039/D4RA02970D.

对 Ahmed M. El-Saghier 等人的 "作为抗炎剂的嘌呤-5-N-异甾烷的合成、对接和生物学评价 "的更正,RSC Adv., 2024, 14, 17785-17800, https://doi.org/10.1039/D4RA02970D。
{"title":"Correction: Synthesis, docking and biological evaluation of purine-5-N-isosteres as anti-inflammatory agents","authors":"Ahmed M. El-Saghier, Souhaila S. Enaili, Aly Abdou, Amany M. Hamed and Asmaa M. Kadry","doi":"10.1039/D4RA90072C","DOIUrl":"https://doi.org/10.1039/D4RA90072C","url":null,"abstract":"<p >Correction for ‘Synthesis, docking and biological evaluation of purine-5-<em>N</em>-isosteres as anti-inflammatory agents’ by Ahmed M. El-Saghier <em>et al.</em>, <em>RSC Adv.</em>, 2024, <strong>14</strong>, 17785–17800, https://doi.org/10.1039/D4RA02970D.</p>","PeriodicalId":102,"journal":{"name":"RSC Advances","volume":null,"pages":null},"PeriodicalIF":3.9,"publicationDate":"2024-07-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://pubs.rsc.org/en/content/articlepdf/2024/ra/d4ra90072c?page=search","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141602608","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
A bifunctional Pasteurella multocida β1-3-galactosyl/N-acetylgalactosaminyltransferase (PmNatB) for the highly efficient chemoenzymatic synthesis of disaccharides. 用于高效化学合成双糖的多杀性巴氏杆菌β1-3-半乳糖基/N-乙酰半乳糖氨基转移酶(PmNatB)。
IF 2.9 3区 化学 Q1 CHEMISTRY, ORGANIC Pub Date : 2024-07-12 DOI: 10.1039/d4ob00889h
Xiaohong Yang, Bijoyananda Mishra, Hai Yu, Yijun Wei, Xi Chen

Glycosyltransferases are nature's key biocatalysts for the formation of glycosidic bonds. Discovery and characterization of new synthetically useful glycosyltransferases are critical for the development of efficient enzymatic and chemoenzymatic strategies for producing complex carbohydrates and glycoconjugates. Herein we report the identification of Pasteurella multocida PmNatB as a bifunctional single-catalytic-domain glycosyltransferase with both β1-3-galactosyltransferase and β1-3-N-acetylgalactosaminyltransferase activities. It is a novel glycosyltransferase for constructing structurally diverse GalNAcβ3Galα/βOR and Galβ3GalNAcα/βOR disaccharides in one-pot multienzyme systems with in situ generation of UDP-sugars.

糖基转移酶是自然界形成糖苷键的关键生物催化剂。发现和鉴定新的具有合成作用的糖基转移酶对于开发生产复杂碳水化合物和糖共轭物的高效酶促和化酶策略至关重要。在此,我们报告了多杀性巴氏杆菌 PmNatB 的鉴定结果,它是一种具有β1-3-半乳糖基转移酶和β1-3-N-乙酰半乳糖氨基转移酶活性的双功能单催化域糖基转移酶。它是一种新型糖基转移酶,可在原位生成 UDP 糖的单锅多酶系统中构建结构多样的 GalNAcβ3Galα/βOR 和 Galβ3GalNAcα/βOR 双糖。
{"title":"A bifunctional <i>Pasteurella multocida</i> β1-3-galactosyl/<i>N</i>-acetylgalactosaminyltransferase (PmNatB) for the highly efficient chemoenzymatic synthesis of disaccharides.","authors":"Xiaohong Yang, Bijoyananda Mishra, Hai Yu, Yijun Wei, Xi Chen","doi":"10.1039/d4ob00889h","DOIUrl":"https://doi.org/10.1039/d4ob00889h","url":null,"abstract":"<p><p>Glycosyltransferases are nature's key biocatalysts for the formation of glycosidic bonds. Discovery and characterization of new synthetically useful glycosyltransferases are critical for the development of efficient enzymatic and chemoenzymatic strategies for producing complex carbohydrates and glycoconjugates. Herein we report the identification of <i>Pasteurella multocida</i> PmNatB as a bifunctional single-catalytic-domain glycosyltransferase with both β1-3-galactosyltransferase and β1-3-<i>N</i>-acetylgalactosaminyltransferase activities. It is a novel glycosyltransferase for constructing structurally diverse GalNAcβ3Galα/βOR and Galβ3GalNAcα/βOR disaccharides in one-pot multienzyme systems with <i>in situ</i> generation of UDP-sugars.</p>","PeriodicalId":96,"journal":{"name":"Organic & Biomolecular Chemistry","volume":null,"pages":null},"PeriodicalIF":2.9,"publicationDate":"2024-07-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141588957","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
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