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Ir-catalyzed asymmetric transfer hydrogenation of racemic quinolinyl-substituted tertiary alcohols ir催化外消旋喹啉取代叔醇的不对称转移加氢反应
IF 5.4 1区 化学 Q1 CHEMISTRY, ORGANIC Pub Date : 2026-01-20 DOI: 10.1039/d5qo01723h
Zhuang Haokun, Huizhen Zhang, Mangang Zhang, Zhiwen Nie, Qin Yin
We report herein a highly efficient stereodivergent reaction on racemic quinolinyl-substituted tertiary alcohols via Ir-catalyzed asymmetric transfer hydrogenation, which affords structurally unique chiral 1,2,3,4-tetrahydroquinolines bearing both endo- and exocyclic chirality. Upon mediation of the configuration of the catalyst, all four diastereomers can be achieved with excellent ee and dr (generally >95% ee). Through reoxidation, the products can be converted into enantiopure starting materials, thus realizing a formal resolution of challenging tertiary alcohols.
本文报道了外消旋喹啉基取代叔醇通过ir催化的不对称转移氢化反应进行了高效立体发散反应,得到了结构独特的具有内环和外环手性的1,2,3,4-四氢喹啉。在催化剂配置的调解下,所有四种非对映体都可以获得优异的ee和dr(一般为>;95% ee)。通过再氧化,产物可以转化为对映纯的起始原料,从而实现了具有挑战性的叔醇的正式分解。
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引用次数: 0
Iridium-catalyzed intramolecular allylic substitution reaction: efficiently enantioselective synthesis of 1,3,4-oxadiazine, oxazo-lines and 1,3-oxazine derivatives 铱催化的分子内烯丙基取代反应:高效对映选择性合成1,3,4-恶二嗪、恶二嗪系及1,3-恶二嗪衍生物
IF 5.4 1区 化学 Q1 CHEMISTRY, ORGANIC Pub Date : 2026-01-20 DOI: 10.1039/d5qo01683e
Xiyu Li, Fang Hu, Yinsheng Qi, Shichuan Wang, Xin-Ping Hui
An efficient Ir-catalyzed enantioselective intramolecular allylic substitution reaction for the synthesis of five- and six-membered N,O-heterocycle compounds has been achieved. This method offers a facile, straightforward access to a diverse range of 1,3,4-oxadiazines with good yields (up to 88%) and excellent enantioselectivities (up to 95% ee), while oxazolines and 1,3-oxazines have also been afforded with comparable yields and ee values.
本文报道了一种高效的镍催化对映选择性分子内烯丙基取代反应,用于合成五元和六元N, o杂环化合物。该方法可方便、直接地获得各种1,3,4-恶二嗪,收率高(高达88%),对映选择性好(高达95% ee),而恶唑啉和1,3-恶二嗪也具有相当的收率和ee值。
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引用次数: 0
Synthesis of azadehydrobenzoannulenes exhibiting exceptional luminescence performance 具有优异发光性能的氮杂氢苯环烯的合成
IF 5.4 1区 化学 Q1 CHEMISTRY, ORGANIC Pub Date : 2026-01-19 DOI: 10.1039/d5qo01657f
Jinling Zhang, Huabi Xie, Yu Zuo, Ningwen Sun, Chengye Yuan, Hongxing Jia, Jinjin Ding, Qiang Huang, Peng Xu
Herein, a family of cyclic electron donor-acceptor structures was synthesized and characterized, in which carbazole was used as the donor integrated into dehydrobenzoannulene (DBA). Subsequent solvent-dependent fluorescence spectra revealed that all resultant azaDBAs exhibited pronounced intramolecular charge transfer properties. Benefiting from this unique electron-delocalized architecture, all resulting azaDBAs demonstrated strong and stable electrochemiluminescence emission in the visible region. Finally, an azaDBAc-based epinephrine sensor was developed, enabling ultrasensitive detection for both the early diagnosis of neurodegenerative diseases and dynamical monitoring of neurotransmitters.
本文合成并表征了一类环状电子给体-受体结构,其中以咔唑为给体整合到脱氢苯环烯(DBA)中。随后的溶剂依赖性荧光光谱显示,所有合成的azaDBAs都表现出明显的分子内电荷转移特性。得益于这种独特的电子离域结构,所有得到的azaDBAs都在可见光区域表现出强大而稳定的电化学发光。最后,开发了一种基于azadbac的肾上腺素传感器,实现了神经退行性疾病早期诊断和神经递质动态监测的超灵敏检测。
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引用次数: 0
Ligand-Controlled Switchable Nickel-Catalyzed Coupling of Nitriles with Aryl Triflates: Divergent Synthesis of Ketones and Diarylmethanes 配体控制的可切换镍催化腈与芳基三氟酸酯的偶联:酮和二芳基甲烷的发散合成
IF 5.4 1区 化学 Q1 CHEMISTRY, ORGANIC Pub Date : 2026-01-16 DOI: 10.1039/d5qo01644d
Xianmao Liu, Yaqi Chen, Qian Ni, Xueyu Liu, Zhi-Juan He, Yuanhong Ma
A ligand-controlled switchable nickel-catalyzed coupling reaction between nitriles and aryl triflates has been developed, enabling the divergent synthesis of two privileged classes of molecules—ketones and diarylmethanes—from identical starting materials. The chemoselectivity is mainly dictated by the choice of phosphine ligand: employing dppp as the ligand promotes reductive addition/hydrolysis, yielding ketones, while switching to Xantphos directs the pathway toward decya-native cross-coupling to furnish diarylmethanes. This protocol features broad substrate scope (up to 60 examples), excellent functional group tolerance, and high chemoselectivity, thus providing a versatile and stepeconomical strategy for modular synthesis of ketones and diarylmethanes from readily available nitriles.
一种配体控制的可切换镍催化的腈和芳基三氟酸酯之间的偶联反应已经被开发出来,使两种特权分子-酮和二芳基甲烷-在相同的起始材料上的不同合成成为可能。化学选择性主要取决于膦配体的选择:使用dppp作为配体促进还原加成/水解,生成酮,而切换到Xantphos则引导途径向十二烷基-天然交叉偶联提供二芳基甲烷。该方案具有广泛的底物范围(多达60个例子),优异的官能团耐受性和高化学选择性,从而为从现成的腈中模块化合成酮和二芳基甲烷提供了一种通用和逐步经济的策略。
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引用次数: 0
Visible-Light-Driven Electrophilic Chalcogen Species: Integration of Sustainable Synthesis, Green Metrics, and Computational Discovery of Antioxidants 可见光驱动的亲电性硫化物:可持续合成、绿色度量和抗氧化剂计算发现的集成
IF 5.4 1区 化学 Q1 CHEMISTRY, ORGANIC Pub Date : 2026-01-15 DOI: 10.1039/d5qo01286d
Filipe Teodoro Coelho, Leonardo Victor Espíndola Guimaraes, Camila Ebersol, Pamella da Costa, Larissa Garcia Velasco, Cristiani Bortolatto, Wendell Karlos Tomazelli Coltro, Luciano Morais Lião, Felipe Lange Coelho, Jose Neto
The emergence of green chemistry principles has driven researchers to develop more sustainable methods for organic synthesis. However, despite this emphasis on environmentally friendly transformations, the green chemistry metrics are often overlooked when assessing the true environmental impact of a reaction, making it difficult to objectively compare new methods with traditional approaches or to determine their true sustainability. With this in mind, this work presents an approach for synthesizing chalcogenylbenzo[b]furans through the visible light-driven generation of electrophilic chalcogen species and further evaluate the sustainability of the developed protocol using various traditional and emerging green chemistry metrics to effectively assess reagent utilization, waste generation and toxicity, and material recovery. The synthetic methodology utilizes the combination of diaryldichalcogenides and carbon tetrabromide to promote the oxidative cyclization of 2-alkynylanisoles, leading to the formation of both selenylbenzo[b]furans and thiobenzo[b]furans in satisfactory yields. The study demonstrates the effectiveness and versatility of the method by employing a range of substrates. Furthermore, the obtained chalcogenylbenzo[b]furans were subjected to an in silico screening to evaluate their antioxidant potential through molecular docking, assessing their interaction with xanthine oxidase and NADPH oxidase enzymes, as well as predicting their ADME/T profiles.
绿色化学原理的出现促使研究人员开发更可持续的有机合成方法。然而,尽管强调对环境友好的转变,但在评估反应的真正环境影响时,绿色化学指标往往被忽视,这使得很难客观地将新方法与传统方法进行比较或确定其真正的可持续性。考虑到这一点,本研究提出了一种通过可见光驱动产生亲电性硫源来合成硫基苯并[b]呋喃的方法,并使用各种传统和新兴的绿色化学指标进一步评估开发方案的可持续性,以有效评估试剂利用率、废物产生和毒性以及材料回收。该合成方法利用二芳基二硫族化合物和四溴化碳的结合促进2-炔基苯基呋喃的氧化环化,从而生成了产率满意的硒基苯并[b]呋喃和噻吩[b]呋喃。该研究通过采用一系列底物证明了该方法的有效性和多功能性。此外,获得的硫基苯并[b]呋喃进行了硅筛选,通过分子对接评估其抗氧化潜力,评估其与黄嘌呤氧化酶和NADPH氧化酶的相互作用,并预测其ADME/T谱。
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引用次数: 0
Rh(III)-catalyzed regioselective C6-arylation of 2-pyridones with diazonaphthalen-2(1H)-ones along with directing group migration Rh(III)催化2-吡啶酮与重氮萘-2(1H)- 1的区域选择性c6芳基化,并指导基团迁移
IF 5.4 1区 化学 Q1 CHEMISTRY, ORGANIC Pub Date : 2026-01-14 DOI: 10.1039/d5qo01563d
Yuanshuang Xu, Shuya Zhang, Yujing Xiao, Xinying Zhang, Xuesen Fan
Herein, an unprecedented Rh(III)-catalyzed C6-arylation of N-pyridyl-2-pyridones with diazonaphthalen-2(1H)-ones along with directing group migration leading to the formation of 6-(2-(pyridin-2-yloxy)naphthalen-1-yl)pyridin-2(1H)-ones is reported. The reaction goes through a cascade process including C–H bond metalation, carbene formation, migratory insertion, and nucleophilic attack of the hydroxyl group of the in situ introduced naphthol moiety onto the pyridyl unit, followed by pyridyl migration. Importantly, this method has been effectively applied to the synthesis of several drug analogues, such as gemfibrozil, ibuprofen, and menthol. Moreover, it exhibits excellent atom- and step-economy, along with remarkable compatibility of functional groups, and high efficiency.
本文报道了史无前例的Rh(III)催化n-吡啶-2-吡啶酮与重氮萘-2(1H)- 1的c6 -芳基化反应,并指导基团迁移形成6-(2-(吡啶-2-酰基)萘-1-基)吡啶-2(1H)- 1。反应经历了C-H键金属化、羰基形成、迁移插入、原位引入的萘酚部分羟基亲核攻击到吡啶基上、吡啶基迁移的级联过程。重要的是,该方法已被有效地应用于几种药物类似物的合成,如吉非罗齐、布洛芬和薄荷醇。具有良好的原子经济性和阶梯经济性,官能团相容性好,效率高。
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引用次数: 0
Biomimetic Total Synthesis of Ten Securinega Alkaloids 十种蛇麻属生物碱的仿生全合成
IF 5.4 1区 化学 Q1 CHEMISTRY, ORGANIC Pub Date : 2026-01-13 DOI: 10.1039/d5qo01704a
Lachlan J. N. Waddell, Zhouqian Jiang, Gideon Grogan, Benjamin Robert Lichman, William Paul Unsworth
The Securinega alkaloids are a diverse family of polycyclic alkaloids with broad biological importance. In this study, a formal [4+2] cycloaddition strategy has been used to complete the biomimetic total synthesis of six Securinega alkaloids, notably using biosynthetically plausible scaffold-forming steps and aqueous reaction conditions. A further four alkaloids were also generated via subsequent rearrangement reactions. Altogether, the total syntheses of ten Securinega alkaloids are described, in one or two linear steps from proposed biosynthetic precursor menisdaurilide. These results support the hypothesis that the same or similar pathways may operate in planta.
麻属生物碱是一类多环生物碱,具有广泛的生物学意义。在本研究中,采用正式的[4+2]环加成策略完成了6种Securinega生物碱的仿生全合成,特别是采用生物合成合理的支架形成步骤和水反应条件。随后的重排反应还生成了另外四种生物碱。总而言之,在一个或两个线性步骤,从提出的生物合成前体半月花脲,描述了十种Securinega生物碱的总合成。这些结果支持了相同或类似的途径可能在植物中起作用的假设。
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引用次数: 0
Carbonyls as Potential Alkenyl Carbanions for Deoxygenative Cross-Coupling with Alkyl Electrophiles 羰基作为潜在的烯基碳离子与烷基亲电试剂的脱氧交叉偶联
IF 5.4 1区 化学 Q1 CHEMISTRY, ORGANIC Pub Date : 2026-01-13 DOI: 10.1039/d5qo01404b
Mei Bai, Shasha Geng, Cheng Ma, Minghui Sun, Chaoqun Shi, Yun He, Shaofei Ni, Zhang Feng
The example of carbonyls as alkenyl carbanions for deoxygenative cross-coupling with alkyl electrophiles has been developed, facilitating the efficient synthesis of alkenes and enabling carbonyl 1,2-transposition alkylation. This protocol features a one-pot three-step synthesis, compatibility with diverse functional groups, mild reaction conditions, and latestage functionalization of biomolecules. Initial experiments and DFT mechanistic studies suggest that the in-situ generated alkenyl boronic esters play a crucial role as intermediates in this reaction, and this transformation involves C-O bond borylation and the Suzuki coupling reaction under transition metal-free conditions.
建立了羰基作为烯基碳离子与烷基亲电试剂进行脱氧交偶联的例子,促进了烯烃的高效合成和羰基1,2-转位烷基化。该方案具有一锅三步合成,与多种官能团兼容,反应条件温和,生物分子后期功能化的特点。初步实验和DFT机理研究表明,原位生成的烯基硼酯作为中间体在该反应中起着至关重要的作用,该转化涉及到无过渡金属条件下的C-O键硼化和Suzuki偶联反应。
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引用次数: 0
Substrate-Controlled Mechanistic Switch Between Protodemetalation and Oxidative Addition in Rh-Catalyzed Carbometalation: A DFT Study rh催化碳金属化过程中原脱金属和氧化加成之间由底物控制的机制转换:DFT研究
IF 5.4 1区 化学 Q1 CHEMISTRY, ORGANIC Pub Date : 2026-01-13 DOI: 10.1039/d5qo01672j
Chunhui Shan, Hong Chen, Xiang Zhang, Xiaoling Luo
This DFT computational study establishes distinct mechanistic pathways for the Rh(I)-catalyzed carbometalation of dihydropyridines and dihydroquinolines, underpinning their divergent enantioselectivity. For dihydropyridines, the energetically preferred route—comprising alkene insertion, protodemetalation, and transmetalation to yield the S-configured product—is stabilized by a chair-like pyridine ring, as evidenced by NPA charge. The enantioselectivity, controlled at the protodemetalation step, arises from differential distortion energies in the competing transition states. Conversely, dihydroquinolines undergo a modified pathway that includes oxidative addition, bypassing direct protodemetalation due to a destabilizing twist-boat conformation. Here, enantiocontrol is shifted to the reductive elimination step, governed by disparities in key dihedral angles among the transition states.
本DFT计算研究为Rh(I)催化的二氢吡啶和二氢喹啉的碳金属化建立了不同的机制途径,支持了它们不同的对映体选择性。对于二氢吡啶,能量上优选的路线——包括烯烃插入、原脱金属和转金属以产生s构型产物——被椅子状的吡啶环稳定,正如NPA电荷所证明的那样。在原脱金属步骤控制的对映体选择性是由竞争过渡态的不同畸变能引起的。相反,二对苯二酚经历了包括氧化加成的修饰途径,由于不稳定的扭船构象而绕过了直接的原金属脱金属。在这里,对映体控制被转移到还原消除步骤,由过渡态之间关键二面角的差异决定。
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引用次数: 0
Base-Promoted Synthesis of β-Keto Sulfone with N-Acyl Pyrroles and Allyl Sulfones 碱促进n -酰基吡咯和烯丙基砜合成β-酮砜
IF 5.4 1区 化学 Q1 CHEMISTRY, ORGANIC Pub Date : 2026-01-13 DOI: 10.1039/d5qo01410g
Jianwei Wang, Fangjie Xu, Jie Li
An efficient method has been developed for the direct transformation of allyl sulfone to β-keto sulfones by their reaction with N-acyl pyrroles under transition metal-free conditions. Simply combining equivalent N-acyl pyrroles, allyl sulfones and NaN(SiMe3)2 enabled the preparation of a broad range of β-keto sulfones. Among the synthesis of such synthetically and biologically relevant structure, the route presented herein features photo and metal-free conditions, convenient operation, and excellent functional group compatibility 2 | J. Name., 2012, 00, 1-3This journal is
建立了在无过渡金属条件下烯丙基砜与n -酰基吡咯直接转化为β-酮砜的有效方法。简单地将等效的n -酰基吡咯、烯丙基砜和NaN(SiMe3)2结合,就可以制备出多种β-酮砜。在这类具有合成和生物学相关性的结构的合成中,本文提出的路线具有无光和无金属条件,操作方便,官能团相容性好等特点。, 2012, 00, 1-3本杂志是
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引用次数: 0
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Organic Chemistry Frontiers
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