{"title":"Cleaner Production of Acetals/Ketals Using a Phosphorus‐Doped Biomass‐Based Carbon Catalyst via Acetalization Reaction","authors":"Yuguo Dong, Shiyun Xiao, Dongsheng Huang, Changle Zhao, Yongdian Xu, Lin Dong, Zupeng Chen, Xiaoli Gu","doi":"10.1002/adsc.70142","DOIUrl":"https://doi.org/10.1002/adsc.70142","url":null,"abstract":"The transformation of aldehydes and ketones into acetals and ketals has garnered significant attention due to their wide applications as fragrances, bio‐oil additives, and organic synthetic intermediates. Conventional acetalization methods, however, often rely on corrosive acids or stoichiometric additives, necessitating harsh conditions and increasing production costs. Here, the development of a phosphorus‐doped carbon catalyst is presented, that enables the acetalization of aldehydes and ketones into acetals and ketals under mild conditions (e.g., 60 °C, atmospheric pressure). This catalyst achieves a high yield of 2‐phenyl‐1,3‐dioxolane (87.1%) from benzaldehyde and exhibits exceptional stability, operating continuously for 120 h in a continuous fixed‐bed reactor. In the continuous reaction, the yield of 2‐phenyl‐1,3‐dioxolane remains over 96% in the first 18 h and slightly decreases to 86% after 120 h of continuous operation. Comprehensive physicochemical characterizations reveal that phosphorus acts as a Lewis acid sites and plays a critical role in modulating the Lewis acid sites of the PC catalysts. This work highlights the significance of optimizing acid properties for the efficient acetalization reaction, offering a promising approach to sustainable chemical synthesis.","PeriodicalId":118,"journal":{"name":"Advanced Synthesis & Catalysis","volume":"26 1","pages":""},"PeriodicalIF":5.4,"publicationDate":"2025-10-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145255491","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Electrochemical Decarboxylative Functionalizations through Carbocation Intermediates","authors":"Fei Lian, Zhoumei Tan, Kun Xu","doi":"10.1002/adsc.70137","DOIUrl":"https://doi.org/10.1002/adsc.70137","url":null,"abstract":"In contrast to radical‐mediated electrochemical decarboxylative couplings, electrochemical decarboxylative functionalizations proceeding through carbocation intermediates (Hofer‐Moest pathway) unlock unique reactivity and selectivity. These in situ‐generated carbocations can be trapped by diverse nucleophiles or undergo elimination to form alkenes, significantly expanding synthetic versatility. This review systematically surveys advances in electrochemical Hofer‐Moest‐type reactions since 2019, categorizing transformations by bond‐forming events (CN, CO, CP, CF, CC, and CC). Beyond summarizing key breakthroughs, it also provide balanced evaluation of current limitations to delineate the scope and applicability of these methods. Finally, persistent challenges are outlined and future research directions in this emerging field is proposed.","PeriodicalId":118,"journal":{"name":"Advanced Synthesis & Catalysis","volume":"37 1","pages":""},"PeriodicalIF":5.4,"publicationDate":"2025-10-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145255489","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Recent Advances in Transition‐Metal‐Catalyzed Thiolation and Sulfonylation of Alkenes","authors":"Anee Taj, Zhen Wang, Luomo Li, Xiao‐Hui Yang","doi":"10.1002/adsc.70131","DOIUrl":"https://doi.org/10.1002/adsc.70131","url":null,"abstract":"The development of efficient and selective strategies for constructing CS bonds has garnered significant attention in organic and medicinal chemistry, owing to the widespread presence of this linkage in biologically active molecules, pharmaceuticals, agrochemicals, and functional materials. Among the various approaches, alkene thiolation and sulfonylation stand out as one of the most straightforward methods for organosulfur synthesis, enabling the direct introduction of sulfur‐containing functionalities into unsaturated hydrocarbons. This review provides a comprehensive summary of recent advances (2013–present) in transition‐metal‐catalyzed CS bond formation via alkene thiolation and sulfonylation. We systematically discuss the synthetic methodologies, including transition‐metal‐catalyzed hydrothiolation, carbothiolation, hydrosulfonylation, and carbosulfonylation, highlighting their respective substrate scope, chemoselectivity, regioselectivity, enantioselectivity, and reaction mechanisms. By consolidating the latest developments and critical perspectives, this review aims to serve as a valuable resource for researchers, encouraging further exploration and innovation in this dynamic field. The continued evolution of transition‐metal‐catalyzed CS bond formation is expected to unlock new opportunities in drug discovery, materials science, and synthetic methodology.","PeriodicalId":118,"journal":{"name":"Advanced Synthesis & Catalysis","volume":"114 1","pages":""},"PeriodicalIF":5.4,"publicationDate":"2025-10-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145246954","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Frances E. Bugden, Andrew D. Bage, Ashima Bajaj, Bin Wang, Fiona J. Gibson, Henry Stone, Yingjian Xu, Frank De Proft, Mercedes Alonso, Mark D. Greenhalgh
{"title":"Ruthenium-Catalyzed Azide-Selenoalkyne Cycloadditions: A Combined Synthetic–Computational Study into Reaction Scope, Mechanism, and Origins of Regioselectivity","authors":"Frances E. Bugden, Andrew D. Bage, Ashima Bajaj, Bin Wang, Fiona J. Gibson, Henry Stone, Yingjian Xu, Frank De Proft, Mercedes Alonso, Mark D. Greenhalgh","doi":"10.1002/adsc.70096","DOIUrl":"https://doi.org/10.1002/adsc.70096","url":null,"abstract":"A ruthenium-catalyzed azide–alkyne cycloaddition (RuAAC) reaction involving selenoalkynes is reported for the synthesis of selenium-substituted 1,2,3-triazole products (26 examples, up to 89% yield). The reaction works well with a wide range of alkyl and aryl azides bearing both electron-donating and -withdrawing groups. This contrasts RuAAC reactions using regular terminal and internal alkynes, where aryl azides bearing electron-withdrawing groups are not generally tolerated. The regioselectivity of the cycloaddition is highly dependent on the identity of the non-selenium substituent of the alkyne. This challenges earlier reports on RuAAC reactions involving thioalkynes and questions the perceived understanding of the regioselectivity of these reactions. Computational modeling of the reaction profiles for four alkyne substrates that provided contrasting regioselectivities accurately reproduces the experimental results. The observed regioselectivity is primarily attributed to the relative nucleophilicity of the alkyne carbons upon coordination to ruthenium and an approach is proposed in which reaction regioselectivity may be predicted.","PeriodicalId":118,"journal":{"name":"Advanced Synthesis & Catalysis","volume":"85 1","pages":""},"PeriodicalIF":5.4,"publicationDate":"2025-10-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145247665","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Visible-Light-Induced Controlled C–H Cyanation or Thiocyanation of Indolizines","authors":"Yuhao Jiang, Qiongying Yang, Dongrong Lin, Xin Jiang, Jubin Liu, Hua Cao, Yue Yu","doi":"10.1002/adsc.70140","DOIUrl":"https://doi.org/10.1002/adsc.70140","url":null,"abstract":"An efficient and controlled approach for C–H cyanation/thiocyanation of indolizines is reported under visible-light-induced conditions. NH<sub>4</sub>SCN is used as the cyano or thiocyano source and the presence or absence of H<sub>2</sub>O<sub>2</sub> are found to be the key factor in the selective construction of C-3 cyano or thiocyano indolizines. A set of control experiments, such as radical trapping experiments and fluorescence quenching studies are conducted to assess mechanistic insights of the reaction.","PeriodicalId":118,"journal":{"name":"Advanced Synthesis & Catalysis","volume":"114 1","pages":""},"PeriodicalIF":5.4,"publicationDate":"2025-10-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145247668","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Kai-Cheng Yang, Zhi-Kui Cao, Hai-Liang Ni, Long Chen
{"title":"Recent Advances in Terminal Alkyne-Involved Alkynylation and Alkynylation-Triggered Tandem Reactions","authors":"Kai-Cheng Yang, Zhi-Kui Cao, Hai-Liang Ni, Long Chen","doi":"10.1002/adsc.70145","DOIUrl":"https://doi.org/10.1002/adsc.70145","url":null,"abstract":"Substituted internal alkynes are one of the most important functional groups in organic chemistry, with broad applications ranging from biochemistry to material science, medicinal chemistry, and pharmaceutical research. Much effort has been made to explore efficient methodologies to introduce an alkyne moiety into molecules. Among alkynylation reagents, terminal alkynes are considered to be the ideal one compared to other substrates like halogenated alkynes and alkynyl hypervalent iodine since it avoids multistep synthesis of these substrates from terminal alkynes to meet the atom-economy criteria. In this review, we summarized recent achievements (from 2020 to 2025) in the application of terminal alkynes for the alkynylation to afford substituted internal alkynes and alkynylation-triggered tandem reactions to yield carbo- and heterocycles, which exist abundantly in nature as synthetic drugs and biologically active natural and non-natural products.","PeriodicalId":118,"journal":{"name":"Advanced Synthesis & Catalysis","volume":"54 1","pages":""},"PeriodicalIF":5.4,"publicationDate":"2025-10-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145247666","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Mechanistic Investigation on an NHC-Catalyzed [3 + 3] Annulation of 2-Bromoenals with β-Oxodithioester: Mechanism, Origins of Stereoselectivity","authors":"Sai-Bo Cao, Yang Wang","doi":"10.1002/adsc.70143","DOIUrl":"https://doi.org/10.1002/adsc.70143","url":null,"abstract":"An increasing number of studies have demonstrated the cooperative use of chiral N-heterocyclic carbenes (NHCs) and Lewis acid to enhance catalytic efficiency in stereoselective annulation reactions. Herein, molecular-level insights into the NHC-catalyzed [3 + 3] annulation of 2-bromoenals with <i>β</i>-oxodithioester are elucidated through density functional theory calculations. The reaction proceeds via multiple key steps: formation of the Breslow intermediate, C<span></span>Br bond cleavage, <i>α</i>-protonation generating <i>α</i>,<i>β</i>-unsaturated acylazolium, stereoselective Si-face addition between the acylazolium and LiCl-coordinated <i>β</i>-oxodithioester, intramolecular proton transfer, and catalyst regeneration. The stereoselectivity-determining C<span></span>C bond formation step exhibits enhanced facial control through cooperative effects. Noncovalent interaction (NCI) and atoms-in-molecules analyses reveal that hydrogen-bond networks, LP···<i>π</i>, and O···S interactions preferentially stabilize the <i>RS</i>-configured isomer. Notably, LiCl plays dual roles: (1) it amplifies stereocontrol by facilitating multiple NCIs during the C<span></span>C bond formation, and (2) reduces transition-state polarity through solvent–solute interactions, thereby lowering the activation barrier. The work deepens the understanding of how Lewis acid additive modulate both electronic and steric landscapes in NHC catalysis, offering valuable insights for stereocontrolled annulation reactions.","PeriodicalId":118,"journal":{"name":"Advanced Synthesis & Catalysis","volume":"2 1","pages":""},"PeriodicalIF":5.4,"publicationDate":"2025-10-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145247199","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Vincenzo Battaglia, Isaac G. Sonsona, Andrea Pellegrini, Andrea Mazzanti, Alessandra Lattanzi
{"title":"Installation of Trifluoromethylated Quaternary Carbon Stereocenters via Asymmetric Epoxidation of Tetrasubstituted Alkenes","authors":"Vincenzo Battaglia, Isaac G. Sonsona, Andrea Pellegrini, Andrea Mazzanti, Alessandra Lattanzi","doi":"10.1002/adsc.70153","DOIUrl":"https://doi.org/10.1002/adsc.70153","url":null,"abstract":"The construction of vicinal quaternary carbon centers via epoxidation of tetrasubstituted alkenes remains a formidable challenge in asymmetric synthesis. Herein, a first catalytic enantioselective epoxidation of acyclic tetrasubstituted alkenes is reported, prepared through the Knoevenagel condensation of trifluoromethyl ketones with malononitrile. (<jats:italic>S</jats:italic>)‐ and (<jats:italic>R</jats:italic>)‐configured epoxides are obtained in generally excellent yields (up to 98%) and with good to high enantioselectivities (up to 89% ee), employing a commercially available system, comprising Takemoto's catalysts and tert‐butyl hydroperoxide (TBHP). Highly reactive new tetrasubtituted alkenes allow the first successful use of Takemoto's catalyst under oxidative conditions. Interestingly, density functional theory studies show that TBHP is exclusively activated by the amino thiourea, with halogen‐bonding interactions playing a critical role in affecting the stereochemical outcome of the epoxidation. Derivatizations provide access to densely functionalized trifluoromethylated compounds, featuring one or two vicinal carbon quaternary stereocenters, with the second center being introduced in a highly stereoselective manner.","PeriodicalId":118,"journal":{"name":"Advanced Synthesis & Catalysis","volume":"112 1","pages":""},"PeriodicalIF":5.4,"publicationDate":"2025-10-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145241640","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Monofluorinated C1 Synthon Strategy for the Construction of Fluoromethylene-Linked Bicyclo[1.1.1]Pentane Derivatives","authors":"Arturs Sperga, Toms Pfeifers, Janis Veliks","doi":"10.1002/adsc.70119","DOIUrl":"https://doi.org/10.1002/adsc.70119","url":null,"abstract":"Fluoroalkyl-substituted bicyclo[1.1.1]pentanes (BCPs) have emerged as an attractive scaffold in drug discovery. Herein, the modular construction of fluoromethyl-linked BCPs is reported. Fluoroiodomethyl phenyl sulfoxide is found to be a synthetic equivalent of a formal fluoromethylene radical cation synthon, which, under metal-free conditions and violet light irradiation (400 nm), enables an atom-transfer radical addition reaction to [1.1.1]propellane. This straightforward approach provides access to novel bicyclo[1.1.1]pentane-substituted fluoromethyl sulfonium reagents. The electrophilic properties of these sulfonium salts allow nucleophilic displacement under mild conditions, enabling the introduction of the fluoromethyl bicyclopentyl group into diverse natural products and drug molecules with good functional group tolerance.","PeriodicalId":118,"journal":{"name":"Advanced Synthesis & Catalysis","volume":"123 1","pages":""},"PeriodicalIF":5.4,"publicationDate":"2025-10-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145247667","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Enantioselective Synthesis of 3,4‐Dihydropyranones via Low‐Loading Squaramide Catalysis “on Water”","authors":"Tianxing Li, Xinxin Li, Jinfeng Zhang, Hui Jin, Lixin Zhang","doi":"10.1002/adsc.70141","DOIUrl":"https://doi.org/10.1002/adsc.70141","url":null,"abstract":"An organocatalytic “on‐water” cascade reaction of <jats:italic>β</jats:italic>‐ketothioesters and <jats:italic>β</jats:italic>,<jats:italic>γ</jats:italic>‐unsaturated <jats:italic>α</jats:italic>‐ketoesters, catalyzed by 0.2 mol% proline‐derived squaramide, delivers 3,4‐dihydropyranones in 74–98% yield with 90–99% ee within 4 h at ambient temperature. Combined NMR and computational studies characterize the product's keto‐enol tautomeric behavior, while synthetic applications include the diastereoselective construction of 3,4‐dihydropyranones featuring an all‐carbon quaternary stereocenter.","PeriodicalId":118,"journal":{"name":"Advanced Synthesis & Catalysis","volume":"53 1","pages":""},"PeriodicalIF":5.4,"publicationDate":"2025-10-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145235316","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}