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Advances in the Synthetic Approaches to α‐Amino Ketones: Scope, Mechanism, and Application α -氨基酮合成方法的研究进展:范围、机理及应用
IF 2.8 3区 化学 Q2 CHEMISTRY, ORGANIC Pub Date : 2026-01-05 DOI: 10.1002/ejoc.202501074
Jisna Jose, Diana Elizabeth Jose, Thomas V. Mathew
α‐amino ketones (α‐AKs) serve as valuable building blocks in synthetic and medicinal chemistry because they are found in many pharmaceuticals and molecules that are biologically active. Different catalytic strategies for their synthesis have been developed as a result of their structural diversity and functional versatility. This review offers a thorough summary of recent developments (2020–2025) in the catalytic synthesis of α‐AKs, emphasizing two main categories: enantioselective (chiral) and achiral methods. Chiral techniques, which offer high enantioselectivity and wide substrate scopes, include transition metal catalysis, organocatalysis, photoredox catalysis, and their combinations. Despite being simpler and more scalable, chiral strategies are useful for quickly building α‐AK scaffolds. With a focus on reaction design, mechanism, tolerance to functional groups, and synthetic utility, recent synthetic approaches are discussed. In addition to outlining the opportunities and challenges that lie ahead in extending the synthetic accessibility and application of these privileged molecular architectures, the review highlights the advancements that have been made in both fields.
α‐氨基酮(α‐AKs)是合成化学和药物化学中有价值的组成部分,因为它们存在于许多具有生物活性的药物和分子中。由于其结构的多样性和功能的多功能性,人们开发了不同的催化合成策略。本文综述了α‐AKs催化合成的最新进展(2020-2025),重点介绍了两大类:对映选择性(手性)和非手性方法。手性技术具有高的对映选择性和广泛的底物范围,包括过渡金属催化、有机催化、光氧化还原催化及其组合。尽管手性策略更简单且更具可扩展性,但它对于快速构建α - AK支架很有用。重点从反应设计、机理、对官能团的耐受性和合成效用等方面对近年来的合成方法进行了讨论。除了概述了在扩展这些特殊分子结构的合成可及性和应用方面所面临的机遇和挑战外,本文还重点介绍了这两个领域的进展。
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引用次数: 0
Catalytic Decarbonylation of Aldehydes: Recent Advances and Future Perspectives 醛类催化脱碳:最新进展和未来展望
IF 2.8 3区 化学 Q2 CHEMISTRY, ORGANIC Pub Date : 2025-12-30 DOI: 10.1002/ejoc.202501130
Wen-Xin Zhou, Jing-Jing Tang, Ming-Wei Ji, Shu-Xian Li, Xiangwen Min, Ming-Ye Sun, Hao-Ran Wang, Ji-Ran Tian, Da-Yan Li, Xiang-Ting Min
This review highlights the expanding role of decarbonylation in modern organic chemistry. Inspired by nature's enzymatic pathways, aldehyde decarbonylation, which enables C−C bond cleavage with the release of carbon monoxide, has emerged as a powerful and versatile transformation in sustainable synthesis, complex molecule modification, and late-stage functionalization. Herein, we summarize recent advances (2021–2025) in both direct decarbonylation and decarbonylative functionalization of aldehydes, the two most significant classes of decarbonylation reactions. Special attention is given to cutting-edge developments in transition-metal catalysis, including Rh-, Ir-, Co-, Ni-, and Pd-based systems, as well as photocatalytic and metal-free protocols, which typically proceed through radical pathways and achieve high selectivity under mild conditions. By bridging classical catalytic methods with emerging radical-driven approaches, this review underscores the growing impact of decarbonylative chemistry in green synthesis, pharmaceutical innovation, and biomass valorization.
本文综述了脱羰基化在现代有机化学中日益扩大的作用。受大自然酶促途径的启发,醛脱碳使C - C键的裂解与一氧化碳的释放成为一种强大而通用的转化,在可持续合成、复杂分子修饰和后期功能化方面已经出现。在此,我们总结了最近的进展(2021-2025)在直接脱碳和脱碳功能化的醛,两类最重要的脱碳反应。特别关注过渡金属催化的前沿发展,包括Rh-, Ir-, Co-, Ni-和pd -基系统,以及光催化和无金属协议,这些通常通过自由基途径进行,并在温和条件下实现高选择性。通过将经典的催化方法与新兴的自由基驱动方法相结合,本综述强调了脱羰化学在绿色合成、药物创新和生物质增值方面日益增长的影响。
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引用次数: 0
Synthesis of Unsymmetric Bis(heteroaryl) Selenides by Rhodium‐Catalyzed Exchange Reaction of Heteroaryl Fluorides and Ethers Using Se ‐Heteroaryl Carboselenoates 硒-杂芳基硒酸盐催化杂芳基氟化物和醚交换反应合成不对称双(杂芳基)硒化物
IF 2.8 3区 化学 Q2 CHEMISTRY, ORGANIC Pub Date : 2025-12-29 DOI: 10.1002/ejoc.202500444
Masana Yazaki, Wei Han, Ren Suzuki, Mieko Arisawa
Various unsymmetric bis(heteroaryl) selenides are synthesized by the rhodium‐catalyzed exchange reaction of heteroaryl fluorides and ethers with Se ‐heteroaryl 1‐adamatanecarboselenoates. The synthetic method is applicable to a broad range of five‐ and six‐membered heteroaryl derivatives, and provides compounds containing multiple heteroatoms. It is shown that the Se ‐heteroaryl selenoates are excellent heteroarylselenating reagents under rhodium catalysis compared with bis(heteroaryl) diselenides.
采用铑催化的方法,以杂芳基氟化物和醚与硒-杂芳基- 1 -阿达马塔anecarboselenoates进行交换反应,合成了多种不对称双(杂芳基)硒化物。该合成方法适用于广泛的五元和六元杂芳基衍生物,并提供含有多个杂原子的化合物。结果表明,硒-杂芳基硒酸盐在铑催化下与双(杂芳基)硒酸盐相比是优良的杂芳基硒化试剂。
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引用次数: 0
A Simple and Efficient Procedure for the Deoxygenation of Ketones via a Palladium‐Catalyzed Reduction of Vinyl Mesylates 钯催化甲酰基乙烯酯还原酮体脱氧的简单高效方法
IF 2.8 3区 化学 Q2 CHEMISTRY, ORGANIC Pub Date : 2025-12-29 DOI: 10.1002/ejoc.202501059
Pierre Hansjacob, Florian Audet, Mohamad Ali Ahmad, Clément Jacob, Pierre‐Georges Echeverria, Gwilherm Evano
A simple and efficient procedure for the deoxygenation of enolizable, activated ketones is reported. Upon activation as the corresponding vinyl mesylates, they are readily and easily reduced to the corresponding hydrocarbons using a particularly simple and reusable heterogeneous catalyst, palladium on carbon, under pressure of hydrogen in water, using only 10% of THF as cosolvent. A range of ketones can be readily deoxygenated using this user‐friendly procedure, while its synthetic potential is highlighted in a total synthesis of tanikolide in which the use of this sequence allows performing the removal of a ketone using a considerably shorter sequence compared to a previously reported procedure. As an added bonus, the intermediate vinyl mesylates are shown to be remarkably stable and easy to handle compared to the corresponding tosylates and triflates.
报道了一种简单有效的烯化活化酮的脱氧方法。在活化后成为相应的甲酰基乙烯酯,使用一种特别简单且可重复使用的多相催化剂,碳上钯,在水中氢气的压力下,仅使用10%的四氢呋喃作为助溶剂,它们很容易还原为相应的碳氢化合物。使用这种用户友好的方法可以很容易地对一系列酮进行脱氧,而其合成潜力在tanikolide的全合成中得到强调,与先前报道的方法相比,使用该序列可以使用相当短的序列进行酮的去除。作为额外的好处,与相应的甲磺酸盐和三氟酸盐相比,中间乙烯基甲磺酸盐表现出非常稳定和易于处理。
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引用次数: 0
Design, Synthesis, and Antioxidative Activity of Natural and Nonnatural Casuarinin Analogs 天然和非天然木麻黄素类似物的设计、合成和抗氧化活性
IF 2.8 3区 化学 Q2 CHEMISTRY, ORGANIC Pub Date : 2025-12-29 DOI: 10.1002/ejoc.202501118
Reina Kusuki, Tai Kaneshima, Takao Myoda, Satoshi Nojima, Ryo Katsuta, Ken Ishigami, Shinnosuke Wakamori
Ellagitannins are polyphenolic compounds that have been widely studied owing to their abundance in natural sources. However, challenges, such as identifying specific reactive hydroxy groups and mitigating oligomer formation at active sites, complicate efforts to enhance their biological activity. In this study, we designed, synthesized, and characterized partially capped and nonnatural molecules of C ‐glycosidic ellagitannins. A unified synthetic method enabled the incorporation of various functional groups into the open‐chain glucose moiety, yielding a series of analogs based on a common C ‐glycosidic ellagitannin core. The antioxidant activities of these analogs were found to depend on their chemical structures. This strategy offers a promising route for the development of ellagitannins with novel functions or enhanced biological activities, thereby addressing the long‐standing challenges in polyphenol research.
鞣花单宁是一种多酚类化合物,由于其丰富的天然来源而被广泛研究。然而,诸如确定特定的活性羟基和减少活性位点的低聚物形成等挑战,使提高其生物活性的努力复杂化。在这项研究中,我们设计、合成并表征了部分盖帽和非天然的C糖苷鞣花单宁分子。一种统一的合成方法可以将各种官能团结合到开链葡萄糖片段中,产生一系列基于共同的C糖苷鞣花单宁核心的类似物。这些类似物的抗氧化活性取决于它们的化学结构。这一策略为开发具有新功能或增强生物活性的鞣花单宁提供了一条有希望的途径,从而解决了多酚研究中长期存在的挑战。
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引用次数: 0
Catalytic Asymmetric Synthesis of Vicinal Chiral Carbonyl Bioisosteres 邻手性羰基生物同工酯的催化不对称合成
IF 2.8 3区 化学 Q2 CHEMISTRY, ORGANIC Pub Date : 2025-12-26 DOI: 10.1002/ejoc.202501098
Mingshuai Zhang, Meihong Luo, Hongyu Wang
The strategic incorporation of α‐chiral centers into carbonyl bioisosteres is a powerful approach for improving the physicochemical and pharmacological profiles of drug candidates. This review summarizes recent advances in the catalytic asymmetric synthesis of vicinal chiral carbonyl bioisosteres, focusing on difluoromethylene, gem‐difluoroalkene, and oxetane motifs. We highlight transition‐metal and organocatalyzed methodologies that achieve high stereocontrol and broad functional group tolerance. Representative examples are analyzed to illustrate key mechanistic pathways, stereochemical models, and applications in late‐stage functionalization. While significant progress has been made, we also discuss persistent challenges regarding generality, efficiency, and mechanistic understanding. Finally, we outline future research directions to guide the rational design of catalytic systems and novel molecular scaffolds, thereby accelerating the discovery of high‐performance pharmaceuticals based on chiral bioisosteres.
将α‐手性中心整合到羰基生物同工异构体中是改善候选药物的物理化学和药理学特征的有力方法。本文综述了催化不对称合成邻手性羰基生物异构体的最新进展,重点介绍了二氟乙烯、宝石二氟烯烃和氧烷基序。我们强调过渡金属和有机催化方法,实现高立体控制和广泛的官能团耐受性。本文分析了具有代表性的例子,以说明关键的机制途径、立体化学模型以及在后期功能化中的应用。虽然取得了重大进展,但我们也讨论了关于普遍性、效率和机制理解的持续挑战。最后,我们概述了未来的研究方向,以指导催化系统和新型分子支架的合理设计,从而加速基于手性生物同工酯的高性能药物的发现。
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引用次数: 0
Diazoenals as 4[C]‐Reagents Toward Direct Synthesis of 2,2′‐Bis(indolyl)methanes From 2,2′‐Dipyrromethanes 重氮杂化物作为4[C]‐试剂从2,2′‐二吡咯甲烷直接合成2,2′‐双(吲哚基)甲烷
IF 2.8 3区 化学 Q2 CHEMISTRY, ORGANIC Pub Date : 2025-12-26 DOI: 10.1002/ejoc.202501045
Chayan Kumar Kundu, Ankan Das, Pallav Sharma, Sreenivas Katukojvala
Herein, we report a Rh(II)‐catalyzed double [4 + 2] benzannulation of diazoenals with 2,2′‐dipyrromethanes, providing direct access to biologically relevant 2,2′‐bis(indolyl)methanes. The transformation proceeds through an in situ generated Rh‐enalcarbenoid intermediate that serves as a 4[C] synthon, enabling regioselective C2‐functionalization of the pyrrole ring followed by intramolecular cyclization. This strategy represents the first example of 2,2′‐bis(indolyl)methanes synthesis that does not rely on indole precursors. By exploiting the unique reactivity of Rh‐enalcarbenoids, this methodology expands the synthetic toolbox for constructing indole‐based heterocyclic frameworks with potential applications in medicinal chemistry. The synthetic importance of double [4 + 2] benzannulation has been demonstrated by the one‐step synthesis of the biologically relevant 2,2′‐bis(indolyl)methane scaffold.
在此,我们报道了Rh(II)‐催化重氮杂化与2,2′‐二吡咯烷的双[4 + 2]苯并反应,提供了直接获得生物学上相关的2,2′‐二(吲哚基)甲烷的途径。转化过程通过原位生成的Rh -烯醛类碳中间体进行,该中间体作为4[C]合成子,实现了吡咯环的区域选择性C2功能化,然后是分子内环化。该策略代表了不依赖于吲哚前体的2,2 ' -二(吲哚基)甲烷合成的第一个例子。通过利用Rh -烯醛类化合物独特的反应性,该方法扩展了构建吲哚基杂环框架的合成工具箱,在药物化学中具有潜在的应用前景。通过一步合成具有生物学意义的2,2′-二(吲哚基)甲烷支架,证明了双[4 + 2]苄基环化的合成重要性。
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引用次数: 0
Preparation and Structure of Meta ‐Hydroxy‐Substituted Aryliodonium Salts: New Structural Type of Phenol‐Derived Hypervalent Iodine Compounds 间羟基取代芳基鎓盐的制备与结构:新型酚衍生高价碘化合物
IF 2.8 3区 化学 Q2 CHEMISTRY, ORGANIC Pub Date : 2025-12-26 DOI: 10.1002/ejoc.202501154
Akira Yoshimura, Scott M. Larson, Mekhman S. Yusubov, Alexander V. Lyulyaev, Gregory T. Rohde, Tatuya Suzuki, Akiharu Ueki, Akio Saito, Viktor V. Zhdankin
The previously unknown meta ‐hydroxy‐substituted aryliodonium salts were prepared by a two‐step one‐pot synthesis based on the reaction of 3‐acetoxy‐1‐[(diacetoxy)iodo]arenes with arylboronic acids, involving the initial formation of 3‐acetoxyphenyl(phenyl)iodonium salts and followed by deacetylation of the intermediate product in the presence of trifluoromethanesulfonic acid. The procedure works well with halogen‐, methyl‐, methoxycarbonyl‐, or methoxy‐substituted arylboronic acids as well as naphthalenylboronic acids, phenanthren‐9‐ylboronic acid, and thiophen‐3‐ylboronic acid. The structure of 3‐hydroxyphenyl(phenyl)iodonium triflate was confirmed by single‐crystal X‐ray crystallography.
之前未知的间羟基取代的芳基碘盐是由3 -乙酰氧基- 1 -[(二乙酰氧基)碘]芳烃与芳基硼酸反应,通过两步一锅合成制备的,包括最初形成3 -乙酰氧基苯基(苯基)碘盐,然后在三氟甲烷磺酸存在下将中间产物脱乙酰化。该方法适用于卤素-、甲基-、甲氧羰基-或甲氧基取代的芳基硼酸以及萘基硼酸、苯乙醚- 9 -基硼酸和噻吩- 3 -基硼酸。用单晶X射线晶体学证实了3 -羟基苯基(苯基)三氟酸碘的结构。
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引用次数: 0
The Activation of the Precatalyst Au–Cl Bond in the Cycloisomerization of Propargylamides: The Role of Hydrogen Bonding 丙炔酰胺环异构化预催化剂Au-Cl键的活化:氢键的作用
IF 2.8 3区 化学 Q2 CHEMISTRY, ORGANIC Pub Date : 2025-12-26 DOI: 10.1002/ejoc.202501109
Leandros P. Zorba, Riku Saito, Sayan Dutta, Savvas G. Chalkidis, Georgios C. Vougioukalakis, Luigi Cavallo, Steven P. Nolan
Herein we describe our findings dealing with the activation of the Au–Cl bond in [Au(L)Cl] complexes with several additives. We have probed several additives for their ability to promote the activation of the Au–Cl bond, in a prototypical cationic Au(I)‐mediated reaction, namely the cyclization/cycloisomerization of propargylamides. Phenol was found to be an efficient additive, successfully promoting the activation of the gold precatalysts, and the progression of the reaction, under mild conditions. Further studies on the reactivity of several substrates and the kinetic profile of the reaction provide valuable insight to the phenol‐mediated activation of Au–Cl bond and its catalytic competence. Density functional theory calculations provided additional details regarding the effect of the studied additives.
在这里,我们描述了我们的发现处理活化的[Au(L)Cl]配合物中的Au - Cl键与几种添加剂。我们研究了几种添加剂在典型的阳离子Au(I)介导反应中促进Au - cl键活化的能力,即丙基酰胺的环化/环异构化。苯酚是一种有效的添加剂,在温和的条件下成功地促进了金预催化剂的活化和反应的进行。对几种底物的反应活性和反应动力学谱的进一步研究为苯酚介导的Au-Cl键活化及其催化能力提供了有价值的见解。密度泛函理论计算提供了有关所研究添加剂影响的更多细节。
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引用次数: 0
A 2A Adenosine Receptor Agonists With Last‐Step Enzymatic 18 F‐Labelling Potential (Fluorinase) for Positron Emission Tomography (PET) A 2A腺苷受体激动剂具有最后一步酶18f标记电位(氟酶)用于正电子发射断层扫描(PET)
IF 2.8 3区 化学 Q2 CHEMISTRY, ORGANIC Pub Date : 2025-12-26 DOI: 10.1002/ejoc.202501125
Nicolas Charalambous, Carina Schleidt, Rongfang Liu, Laura H. Heitman, Sergio Dall’Angelo, David O’Hagan, Phillip T. Lowe
New agonists of the A 2A receptor are reported with 18 F‐labelling potential for positron emission tomography (PET). These were designed by exploiting common binding interactions of substrates for the fluorinase and agonists of the human A 2A adenosine receptor. Target compounds were structurally inspired by the selective A 2A receptor agonist CGS21680 . The new agonists were synthesised and their affinities for the human A 2A receptor evaluated through radioligand displacement assays. 18 F‐Labelled analogues of the new agonists for potential PET radiotracer applications are now accessible through last‐step radiosynthesis using the fluorinase enzyme and [ 18 F]fluoride.
据报道,新的a2a受体激动剂在正电子发射断层扫描(PET)中具有18f -标记电位。这些是通过利用氟酶底物和人类a2a腺苷受体激动剂的共同结合相互作用而设计的。靶化合物在结构上受到选择性a2a受体激动剂CGS21680的启发。合成了新的激动剂,并通过放射性配体置换试验评估了它们对人a2a受体的亲和力。现在,通过使用氟酶和[18f]氟化物的最后一步放射性合成,可以获得用于潜在PET放射性示踪剂应用的新激动剂的18f标记类似物。
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引用次数: 0
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European Journal of Organic Chemistry
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