1
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Choo MZY, Lim ET, Wong WSF, Chai CLL. Discovery of an NF-κB1 p105 Degrader for Anti-Inflammatory Therapy via Structural Optimization of the Coumarin Natural Product Minutuminolate. J Med Chem 2025. [PMID: 40378174 DOI: 10.1021/acs.jmedchem.5c00055] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/18/2025]
Abstract
In this study, the coumarin natural product minutuminolate (MNT) was used as a starting point for the development of anti-inflammatory agents. Through structure-activity relationship studies, a lead compound MD-1 was designed and synthesized, exhibiting significantly improved anti-inflammatory activities. Mechanistic studies revealed that MD-1 is a degrader of the p105 subunit of NF-κB. Gene knockdown experiments further showed that the Cullin-ring ligase (CRL) SCFβTrCP is involved in MD-1-induced p105 degradation. This leads to suppressed NF-κB transcriptional activity, which is consistent with its potent anti-inflammatory effects. Taken together, our work challenges the longstanding notion that NF-κB is undruggable, as we demonstrate that the p105 subunit of NF-κB is indeed tractable with small molecules. More importantly, our study highlights that natural products are valuable starting points for the discovery and development of anti-inflammatory agents with novel mechanisms of action.
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Affiliation(s)
- Malcolm Z Y Choo
- Department of Pharmacy and Pharmaceutical Sciences, National University of Singapore, 18 Science Drive 4, 117543 Singapore
| | - En Tong Lim
- Department of Pharmacy and Pharmaceutical Sciences, National University of Singapore, 18 Science Drive 4, 117543 Singapore
| | - W S Fred Wong
- Department of Pharmacology, Yong Loo Lin School of Medicine, National University Health System, 16 Medical Drive, 117600 Singapore
- Drug Discovery and Optimization Platform, Yong Loo Lin School of Medicine, National University Health System, 117600 Singapore
| | - Christina L L Chai
- Department of Pharmacy and Pharmaceutical Sciences, National University of Singapore, 18 Science Drive 4, 117543 Singapore
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2
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Yi L, Sheng B, Xu Z, Tan S, Lan P, Banwell MG, White LV. Modeling Possible Biogenetic Pathways to the Isomeric Pyrano[2,3- g]indole and Pyrano[3,2- f]indole Cores of Certain Prenylated Indole Alkaloids Using Gold(I)-Catalyzed Intramolecular Hydroarylation Reactions. J Org Chem 2025; 90:3140-3154. [PMID: 39998119 DOI: 10.1021/acs.joc.4c02300] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/26/2025]
Abstract
A significant subset of the so-called prenylated indole alkaloids (PIAs) contains an angularly fused pyrano[2,3-g]indole core, while a smaller number embody the isomeric and linearly fused pyrano[3,2-f]indole one. In an effort to probe the capacities of intramolecular hydroarylation (IMHA) reactions to allow for the selective formation of one or other of these motifs, a series of 6-((2-methylbut-3-yn-2-yl)oxy)-1H-indoles varying in the nature of the substituents at C1-C3 was prepared and subjected to reaction with a range of gold(I) catalysts. In every instance, preferential (but not exclusive) formation of the angularly fused pyrano[2,3-g]indole isomer was observed. This was so even as the C2 and C3 substituents increasingly resembled those associated with key members of the PIA family of natural products. These IMHA protocols have been deployed in the total syntheses of the natural products (±)-1, (±)-2, (±)-3, (±)-4, 25, and 26. The possible biosynthetic implications of these studies are discussed.
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Affiliation(s)
- Liangguang Yi
- Institute for Advanced and Applied Chemical Synthesis, College of Pharmacy, Jinan University, Guangzhou 510632, People's Republic of China
- State Key Laboratory of Bioactive Molecules and Druggability Assessment, Jinan University, Guangzhou, Guangdong 510632, People's Republic of China
- Guangdong Province Key laboratory of Pharmacodynamic Constituents of TCM and New Drugs Research, Jinan University, Guangzhou, Guangdong 510632, People's Republic of China
| | - Bingbing Sheng
- Institute for Advanced and Applied Chemical Synthesis, College of Pharmacy, Jinan University, Guangzhou 510632, People's Republic of China
- State Key Laboratory of Bioactive Molecules and Druggability Assessment, Jinan University, Guangzhou, Guangdong 510632, People's Republic of China
- Guangdong Province Key laboratory of Pharmacodynamic Constituents of TCM and New Drugs Research, Jinan University, Guangzhou, Guangdong 510632, People's Republic of China
| | - Zhongnan Xu
- Institute for Advanced and Applied Chemical Synthesis, College of Pharmacy, Jinan University, Guangzhou 510632, People's Republic of China
- State Key Laboratory of Bioactive Molecules and Druggability Assessment, Jinan University, Guangzhou, Guangdong 510632, People's Republic of China
- Guangdong Province Key laboratory of Pharmacodynamic Constituents of TCM and New Drugs Research, Jinan University, Guangzhou, Guangdong 510632, People's Republic of China
| | - Shen Tan
- Institute for Advanced and Applied Chemical Synthesis, College of Pharmacy, Jinan University, Guangzhou 510632, People's Republic of China
- State Key Laboratory of Bioactive Molecules and Druggability Assessment, Jinan University, Guangzhou, Guangdong 510632, People's Republic of China
- Guangdong Province Key laboratory of Pharmacodynamic Constituents of TCM and New Drugs Research, Jinan University, Guangzhou, Guangdong 510632, People's Republic of China
| | - Ping Lan
- Institute for Advanced and Applied Chemical Synthesis, College of Pharmacy, Jinan University, Guangzhou 510632, People's Republic of China
- State Key Laboratory of Bioactive Molecules and Druggability Assessment, Jinan University, Guangzhou, Guangdong 510632, People's Republic of China
- Guangdong Province Key laboratory of Pharmacodynamic Constituents of TCM and New Drugs Research, Jinan University, Guangzhou, Guangdong 510632, People's Republic of China
| | - Martin G Banwell
- Institute for Advanced and Applied Chemical Synthesis, College of Pharmacy, Jinan University, Guangzhou 510632, People's Republic of China
- State Key Laboratory of Bioactive Molecules and Druggability Assessment, Jinan University, Guangzhou, Guangdong 510632, People's Republic of China
- Guangdong Province Key laboratory of Pharmacodynamic Constituents of TCM and New Drugs Research, Jinan University, Guangzhou, Guangdong 510632, People's Republic of China
| | - Lorenzo V White
- Institute for Advanced and Applied Chemical Synthesis, College of Pharmacy, Jinan University, Guangzhou 510632, People's Republic of China
- State Key Laboratory of Bioactive Molecules and Druggability Assessment, Jinan University, Guangzhou, Guangdong 510632, People's Republic of China
- Guangdong Province Key laboratory of Pharmacodynamic Constituents of TCM and New Drugs Research, Jinan University, Guangzhou, Guangdong 510632, People's Republic of China
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3
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Ravera F, Floreani F, Tubaro C, Roverso M, Pedrazzani R, Bandini M, Biffis A. An Improved Gold(I) Catalytic System for the Preparation of Coumarins via Intramolecular Cyclization. Chem Asian J 2025; 20:e202400725. [PMID: 39400491 PMCID: PMC11697228 DOI: 10.1002/asia.202400725] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/22/2024] [Revised: 09/02/2024] [Accepted: 10/09/2024] [Indexed: 10/15/2024]
Abstract
A catalytic system comprising a gold(I) complex with an N-heterocyclic carbene (NHC) ligand in an ionic liquid as solvent exhibits higher catalytic efficiency compared to state of the art systems in the title reaction, which enables using down to 0.01 mol % gold. A commercial gold(I) catalyst such as IPrAuNTf2 can be employed for this purpose. In the case of less reactive substrates bearing electron-withdrawing substituents at the phenol moiety, a tailor made NHC-gold(I) precatalyst exhibits improved reactivity and can be advantageously employed compared to the commercial one.
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Affiliation(s)
- Francesco Ravera
- Department of Chemical Sciences–DiSCUniversity of PadovaVia Marzolo 135131PadovaItaly
- Consorzio Interuniversitario per le Reattività Chimiche e la Catalisi (CIRCC)University of PadovaVia Marzolo 135131PadovaItaly
| | - Federico Floreani
- Department of Chemical Sciences–DiSCUniversity of PadovaVia Marzolo 135131PadovaItaly
- Consorzio Interuniversitario per le Reattività Chimiche e la Catalisi (CIRCC)University of PadovaVia Marzolo 135131PadovaItaly
| | - Cristina Tubaro
- Department of Chemical Sciences–DiSCUniversity of PadovaVia Marzolo 135131PadovaItaly
- Consorzio Interuniversitario per le Reattività Chimiche e la Catalisi (CIRCC)University of PadovaVia Marzolo 135131PadovaItaly
| | - Marco Roverso
- Department of Chemical Sciences–DiSCUniversity of PadovaVia Marzolo 135131PadovaItaly
| | - Riccardo Pedrazzani
- Department of Chemistry “G. Ciamician”Alma Mater Studiorum − University of BolognaVia Selmi 2I-40126BolognaItaly
| | - Marco Bandini
- Department of Chemistry “G. Ciamician”Alma Mater Studiorum − University of BolognaVia Selmi 2I-40126BolognaItaly
| | - Andrea Biffis
- Department of Chemical Sciences–DiSCUniversity of PadovaVia Marzolo 135131PadovaItaly
- Consorzio Interuniversitario per le Reattività Chimiche e la Catalisi (CIRCC)University of PadovaVia Marzolo 135131PadovaItaly
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4
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Xu Z, Liang XT, White LV, Banwell MG, Tan S. Biomimetic and Concise Total Syntheses of Prenylated and Bicyclo[2.2.2]diazaoctane-Containing Indole Alkaloids Including Taichunamide A, Notoamide N and Versicolamide B. J Org Chem 2024; 89:12639-12650. [PMID: 39180143 DOI: 10.1021/acs.joc.4c01559] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 08/26/2024]
Abstract
Total syntheses of the title prenylated indole alkaloids together with seven others are reported. Biogenetic considerations have been employed in devising the reaction sequences leading to these targets with, in the opening stages, electrochemically-derived indole-3-carboxaldehyde 15 being subject to an aldol-type condensation reaction involving diketopiperazine derivative 19. This led, after prototopic shifts, intramolecular Diels-Alder cycloaddition and hydrolysis/deprotection steps, to the racemic forms of the bicyclo[2.2.2]diazaoctane-containing natural product stephacidin A (2) and its C6 epimer 3. Epoxidation of the last compound afforded, following rearrangement of the primary oxidation products, a mixture of (±)-taichunamide A [(±)-4] and (±)-versicolamide B [(±)-7]. Related protocols allowed for the conversion of (±)-stephacidin A [(±)-2] into (±)-notoamide B [(±)-5]. Analogous aldol condensation, nucleophilic reduction, and epoxidation steps led to the formation of (-)-notoamide E and its conversion into notoamide C as well as the indole fragmentation product amoenamide E. A late-stage chlorination reaction applied to (±)-stephacidin A provided access to the spirocyclic oxindole (±)-notoamide N [(±)-6].
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Affiliation(s)
- Zhongnan Xu
- Institute for Advanced and Applied Chemical Synthesis, College of Pharmacy, Jinan University, Guangzhou 510632, China
- State Key Laboratory of Bioactive Molecules and Druggability Assessment, Jinan University, Guangzhou 510632, China
- Guangdong Province Key Laboratory of Pharmacodynamic Constituents of TCM & New Drugs Research, Jinan University, Guangzhou 510632, China
| | - Xin-Ting Liang
- Institute for Advanced and Applied Chemical Synthesis, College of Pharmacy, Jinan University, Guangzhou 510632, China
- State Key Laboratory of Bioactive Molecules and Druggability Assessment, Jinan University, Guangzhou 510632, China
- Guangdong Province Key Laboratory of Pharmacodynamic Constituents of TCM & New Drugs Research, Jinan University, Guangzhou 510632, China
| | - Lorenzo V White
- Institute for Advanced and Applied Chemical Synthesis, College of Pharmacy, Jinan University, Guangzhou 510632, China
- State Key Laboratory of Bioactive Molecules and Druggability Assessment, Jinan University, Guangzhou 510632, China
- Guangdong Province Key Laboratory of Pharmacodynamic Constituents of TCM & New Drugs Research, Jinan University, Guangzhou 510632, China
| | - Martin G Banwell
- Institute for Advanced and Applied Chemical Synthesis, College of Pharmacy, Jinan University, Guangzhou 510632, China
- State Key Laboratory of Bioactive Molecules and Druggability Assessment, Jinan University, Guangzhou 510632, China
- Guangdong Province Key Laboratory of Pharmacodynamic Constituents of TCM & New Drugs Research, Jinan University, Guangzhou 510632, China
| | - Shen Tan
- Institute for Advanced and Applied Chemical Synthesis, College of Pharmacy, Jinan University, Guangzhou 510632, China
- State Key Laboratory of Bioactive Molecules and Druggability Assessment, Jinan University, Guangzhou 510632, China
- Guangdong Province Key Laboratory of Pharmacodynamic Constituents of TCM & New Drugs Research, Jinan University, Guangzhou 510632, China
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5
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Rajput D, Jan G, Karuppasamy M, Bhuvanesh N, Nagarajan S, Maheswari CU, Menéndez JC, Sridharan V. Rapid Assembly of Functionalized 2 H-Chromenes and 1,2-Dihydroquinolines via Microwave-Assisted Secondary Amine-Catalyzed Cascade Annulation of 2- O/ N-Propargylarylaldehydes with 2,6-Dialkylphenols. J Org Chem 2023; 88:11778-11792. [PMID: 37556760 DOI: 10.1021/acs.joc.3c01082] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 08/11/2023]
Abstract
An efficient, secondary amine-catalyzed cascade annulation of 2-O/N-propargylarylaldehydes with 2,6-dialkylphenols was established to access biologically relevant functionalized 2H-chromenes and 1,2-dihydroquinolines tethered with a synthetically useful p-quinone methide scaffold in high yields under microwave irradiation and conventional heating conditions. The microwave-assisted strategy was convenient, clean, rapid, and high yielding in which the reactions were completed in just 15 min, and the yields obtained were up to 95%. This highly atom-economical domino process constructed two new C-C double bonds and a six-membered O/N-heterocyclic ring in a single synthetic operation. Its mechanism process was rationalized as involving sequential iminium ion formation, nucleophilic addition, and intramolecular annulation steps. Furthermore, the synthesized 2H-chromene derivatives were transformed into valuable indeno[2,1-c]chromenes, 5H-indeno[2,1-c]quinolines, and oxireno[2,3-c]chromene via a palladium-catalyzed double C-H bond activation process and epoxidation, respectively.
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Affiliation(s)
- Diksha Rajput
- Department of Chemistry and Chemical Sciences, Central University of Jammu, Rahya-Suchani (Bagla), District-Samba, Jammu 181143, Jammu and Kashmir, India
| | - Gowsia Jan
- Department of Chemistry and Chemical Sciences, Central University of Jammu, Rahya-Suchani (Bagla), District-Samba, Jammu 181143, Jammu and Kashmir, India
| | - Muthu Karuppasamy
- Department of Chemistry and Chemical Sciences, Central University of Jammu, Rahya-Suchani (Bagla), District-Samba, Jammu 181143, Jammu and Kashmir, India
| | - Nattamai Bhuvanesh
- Department of Chemistry, Texas A & M University, College Station, Texas 77843, United States
| | - Subbiah Nagarajan
- Department of Chemistry, National Institute of Technology, Warangal, Warangal 506004, Telangana, India
| | - C Uma Maheswari
- Department of Chemistry, School of Chemical and Biotechnology, SASTRA Deemed University, Thanjavur 613401, Tamil Nadu, India
| | - J Carlos Menéndez
- Unidad de Química Orgánica y Farmacéutica, Departamento de Química en Ciencias Farmacéuticas, Facultad de Farmacia, Universidad Complutense de Madrid, Madrid 28040, Spain
| | - Vellaisamy Sridharan
- Department of Chemistry and Chemical Sciences, Central University of Jammu, Rahya-Suchani (Bagla), District-Samba, Jammu 181143, Jammu and Kashmir, India
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6
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Yates NDJ, Hatton NE, Fascione MA, Parkin A. Site-Selective Aryl Diazonium Installation onto Protein Surfaces at Neutral pH using a Maleimide-Functionalized Triazabutadiene. Chembiochem 2023; 24:e202300313. [PMID: 37311168 DOI: 10.1002/cbic.202300313] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/20/2023] [Revised: 06/01/2023] [Accepted: 06/08/2023] [Indexed: 06/15/2023]
Abstract
Aryl diazonium cations are versatile bioconjugation reagents due to their reactivity towards electron-rich aryl residues and secondary amines, but historically their usage has been hampered by both their short lifespan in aqueous solution and the harsh conditions required to generate them in situ. Triazabutadienes address many of these issues as they are stable enough to endure multiple-step chemical syntheses and can persist for several hours in aqueous solution, yet upon UV-exposure rapidly release aryl diazonium cations under biologically-relevant conditions. This paper describes the synthesis of a novel maleimide-functionalized triazabutadiene suitable for site-selectively installing aryl diazonium cations into proteins at neutral pH; we show reaction with this molecule and a surface-cysteine of a thiol disulfide oxidoreductase. Through photoactivation of the site-selectively installed triazabutadiene motifs, we generate aryl diazonium functionality, which we further derivatize via azo-bond formation to electron-rich aryl species, showcasing the potential utility of this strategy for the generation of photoswitches or protein-drug conjugates.
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Affiliation(s)
- Nicholas D J Yates
- Department of Chemistry, University of York Heslington, York, YO10 5DD, UK
| | - Natasha E Hatton
- Department of Chemistry, University of York Heslington, York, YO10 5DD, UK
| | - Martin A Fascione
- Department of Chemistry, University of York Heslington, York, YO10 5DD, UK
| | - Alison Parkin
- Department of Chemistry, University of York Heslington, York, YO10 5DD, UK
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7
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Dalligos D, Pilling MJ, Dimitrakis G, Ball LT. Coaxial Dielectric Spectroscopy as an In-Line Process Analytical Technique for Reaction Monitoring. Org Process Res Dev 2023; 27:1094-1103. [PMID: 37342802 PMCID: PMC10278184 DOI: 10.1021/acs.oprd.3c00081] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/14/2023] [Indexed: 06/23/2023]
Abstract
The suitability of broadband dielectric spectroscopy (DS) as a tool for in-line (in situ) reaction monitoring is demonstrated. Using the esterification of 4-nitrophenol as a test-case, we show that multivariate analysis of time-resolved DS data-collected across a wide frequency range with a coaxial dip-probe-allows reaction progress to be measured with both high precision and high accuracy. In addition to the workflows for data collection and analysis, we also establish a convenient method for rapidly assessing the applicability of DS to previously untested reactions or processes. We envisage that, given its orthogonality to other spectroscopic methods, its low cost, and its ease of implementation, DS will be a valuable addition to the process chemist's analytical toolbox.
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Affiliation(s)
- Desiree
M. Dalligos
- Department
of Chemical and Environmental Engineering, University of Nottingham, Coates Building, Nottingham NG7 2RD, U.K.
- School
of Chemistry, University of Nottingham, Nottingham NG7 2RD, U.K.
| | - Michael J. Pilling
- Chemical
Development, Pharmaceutical Technology & Development, Operations, AstraZeneca, Macclesfield SK10 2NA, U.K.
| | - Georgios Dimitrakis
- Department
of Chemical and Environmental Engineering, University of Nottingham, Coates Building, Nottingham NG7 2RD, U.K.
| | - Liam T. Ball
- School
of Chemistry, University of Nottingham, Nottingham NG7 2RD, U.K.
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8
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Fernández-Peña L, Matos MJ, López E. Recent Advances in Biologically Active Coumarins from Marine Sources: Synthesis and Evaluation. Mar Drugs 2022; 21:37. [PMID: 36662210 PMCID: PMC9864071 DOI: 10.3390/md21010037] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/14/2022] [Revised: 12/25/2022] [Accepted: 12/27/2022] [Indexed: 01/03/2023] Open
Abstract
Coumarin and its derivatives have significantly attracted the attention of medicinal chemists and chemical biologists due to their huge range of biological, and in particular, pharmacological properties. Interesting families of coumarins have been found from marine sources, which has accelerated the drug discovery process by inspiring innovation or even by the identification of analogues with remarkable biological properties. The purpose of this review is to showcase the most interesting marine-derived coumarins from a medicinal chemistry point of view, as well as the novel and useful synthetic routes described to date to achieve these chemical structures. The references that compose this overview were collected from PubMed, Mendeley and SciFinder.
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Affiliation(s)
- Laura Fernández-Peña
- Department of Organic Chemistry, University of Valladolid, Campus Miguel Delibes, 47011 Valladolid, Spain
| | - Maria João Matos
- Departamento de Química Orgánica, Facultade de Farmacia, Universidade Santiago de Compostela, 15782 Santiago de Compostela, Spain
| | - Enol López
- Department of Organic Chemistry, University of Valladolid, Campus Miguel Delibes, 47011 Valladolid, Spain
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9
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Yuan Y, Liu Y, Wang H, Zhang X. Fe(III)‐Mediated
para
‐Selective Nucleophilic Thiocyanation and Oxidation Reactions, Access to Thiocyanated Amidophenols and Amidoquinones. ChemistrySelect 2022. [DOI: 10.1002/slct.202203719] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Ye Yuan
- Shaanxi Key Laboratory of Natural Products & Chemical Biology College of Chemistry & Pharmacy Northwest A&F University 22 Xinong Road, Yangling 712100 Shaanxi P. R. China
| | - Yibo Liu
- Shaanxi Key Laboratory of Natural Products & Chemical Biology College of Chemistry & Pharmacy Northwest A&F University 22 Xinong Road, Yangling 712100 Shaanxi P. R. China
| | - HongLing Wang
- Shaanxi Key Laboratory of Natural Products & Chemical Biology College of Chemistry & Pharmacy Northwest A&F University 22 Xinong Road, Yangling 712100 Shaanxi P. R. China
| | - Xiang Zhang
- Shaanxi Key Laboratory of Natural Products & Chemical Biology College of Chemistry & Pharmacy Northwest A&F University 22 Xinong Road, Yangling 712100 Shaanxi P. R. China
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10
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Pali P, Yadav D, Sahoo SC, Shankar Singh M. Metal-Free One-Pot Annulative Coupling of 2-Hydroxybenzaldehydes with β-Ketothioamides: Access to Diverse 2-Arylimino-2 H-Chromenes. J Org Chem 2022; 87:12342-12351. [PMID: 36037527 DOI: 10.1021/acs.joc.2c01581] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
A concise and practical one-pot sustainable approach for expedient synthesis of 2-arylimino-2H-chromenes by two-component cascade [4 + 2] annulative coupling of easily available 2-hydroxybenzaldehydes with β-ketothioamides has been developed in good yields for the first time. Remarkably, metal- and additive-free conditions, use of simple K2CO3 as a mild base, open atmosphere, exclusive regioselectivity, step/atom economy, nonhazardous reagents, and easy purification are added characteristics to the strategy. This annulative protocol will not only provide an efficient method to access diverse chromene scaffolds, but also enrich the research domain of β-ketothioamides.
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Affiliation(s)
- Pragya Pali
- Department of Chemistry, Institute of Science, Banaras Hindu University, Varanasi 221005, India
| | - Dhananjay Yadav
- Department of Chemistry, Institute of Science, Banaras Hindu University, Varanasi 221005, India
| | - Subash C Sahoo
- Department of Chemistry, Panjab University, Chandigarh 160014, India
| | - Maya Shankar Singh
- Department of Chemistry, Institute of Science, Banaras Hindu University, Varanasi 221005, India
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11
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Solas M, Suárez‐Pantiga S, Sanz R. Asymmetric Gold(I)-Catalyzed Tandem Hydroarylation-Nazarov Cyclization: Enantioselective Access to Cyclopentenones. Angew Chem Int Ed Engl 2022; 61:e202207406. [PMID: 35785510 PMCID: PMC9544548 DOI: 10.1002/anie.202207406] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/19/2022] [Indexed: 11/13/2022]
Abstract
The asymmetric synthesis of cyclopentachromenones from gold-catalyzed reaction of readily available skipped alkenynones is described. This cascade reaction involves an initial anti-Michael hydroarylation of the ynone moiety to form a gold-functionalized dialkenylketone intermediate, followed by a Nazarov cyclization that proceeds in an unprecedented enantioselective manner. Excellent enantiomeric ratios and chemical yields are obtained under mild reaction conditions.
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Affiliation(s)
- Marta Solas
- Área de Química Orgánica. Departamento de QuímicaFacultad de CienciasUniversidad de BurgosPza. Misael Bañuelos09001BurgosSpain
| | - Samuel Suárez‐Pantiga
- Área de Química Orgánica. Departamento de QuímicaFacultad de CienciasUniversidad de BurgosPza. Misael Bañuelos09001BurgosSpain
| | - Roberto Sanz
- Área de Química Orgánica. Departamento de QuímicaFacultad de CienciasUniversidad de BurgosPza. Misael Bañuelos09001BurgosSpain
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12
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Solas M, Suárez-Pantiga S, Sanz R. Asymmetric Gold(I)‐Catalyzed Tandem Hydroarylation‐Nazarov Cyclization: Enantioselective Access to Cyclopentenones. Angew Chem Int Ed Engl 2022. [DOI: 10.1002/ange.202207406] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Marta Solas
- Universidad de Burgos Química Facultad de CienciasPza. Misael Bañuelos, s/n 09001 Burgos SPAIN
| | - Samuel Suárez-Pantiga
- Universidad de Burgos Química Facultad de CienciasPza. Misael Bañuelos, s/n 09001 Burgos SPAIN
| | - Roberto Sanz
- Universidad de Burgos Área de Química Orgánica Departamento de Química Facultad de Ciencias Pza. Misael Bañuelos s/n 09001 Burgos SPAIN
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13
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Zheng SL, Wen Z, Yang KC, Zeng Y, Chen L, Deng JF. Copper(II)-catalyzed direct dehydrative alkynylation of 2 H-chromene hemiketals with terminal alkynes to 2,2-disubstituted 2-alkynylated 2 H-chromenes. Org Biomol Chem 2022; 20:3785-3789. [PMID: 35438703 DOI: 10.1039/d2ob00481j] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The first copper-catalyzed direct dehydrative alkynylation of 2H-chromene hemiketals with terminal alkynes has been uncovered. The use of cheap and readily available CuCl2 as the catalyst allowed the preparation of various 2,2-disubstituted 2-alkynylated 2H-chromenes in moderate to good yields, which compensates for the limitation of the current methods only suited for the synthesis of 2-monosubsituted 2-alkynylated 2H-chromenes.
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Affiliation(s)
- Shi-Lu Zheng
- College of Food and Biological Engineering, Chengdu University, 2025 Chengluo Avenue, Chengdu 610016, P. R. China.,Institute for Advanced Study, Chengdu University, 2025 Chengluo Avenue, Chengdu 610016, P. R. China.
| | - Zhong Wen
- Institute for Advanced Study, Chengdu University, 2025 Chengluo Avenue, Chengdu 610016, P. R. China. .,Antibiotics Research and Re-Evaluation Key Laboratory of Sichuan Province, Sichuan Industrial Institute of Antibiotics, School of Pharmacy, Chengdu University, 2025 Chengluo Avenue, Chengdu 610016, P. R. China
| | - Kai-Cheng Yang
- Institute for Advanced Study, Chengdu University, 2025 Chengluo Avenue, Chengdu 610016, P. R. China. .,Antibiotics Research and Re-Evaluation Key Laboratory of Sichuan Province, Sichuan Industrial Institute of Antibiotics, School of Pharmacy, Chengdu University, 2025 Chengluo Avenue, Chengdu 610016, P. R. China
| | - Yao Zeng
- Institute for Advanced Study, Chengdu University, 2025 Chengluo Avenue, Chengdu 610016, P. R. China. .,Antibiotics Research and Re-Evaluation Key Laboratory of Sichuan Province, Sichuan Industrial Institute of Antibiotics, School of Pharmacy, Chengdu University, 2025 Chengluo Avenue, Chengdu 610016, P. R. China
| | - Long Chen
- Institute for Advanced Study, Chengdu University, 2025 Chengluo Avenue, Chengdu 610016, P. R. China. .,Antibiotics Research and Re-Evaluation Key Laboratory of Sichuan Province, Sichuan Industrial Institute of Antibiotics, School of Pharmacy, Chengdu University, 2025 Chengluo Avenue, Chengdu 610016, P. R. China
| | - Jun-Feng Deng
- Institute for Advanced Study, Chengdu University, 2025 Chengluo Avenue, Chengdu 610016, P. R. China. .,Antibiotics Research and Re-Evaluation Key Laboratory of Sichuan Province, Sichuan Industrial Institute of Antibiotics, School of Pharmacy, Chengdu University, 2025 Chengluo Avenue, Chengdu 610016, P. R. China
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14
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Efficient Synthesis of 3-Sulfonyl-2-sulfonylmethyl-2H-chromenes via Tandem Knoevenagel Condensation/Oxa-Michael Addition Protocol. Catalysts 2022. [DOI: 10.3390/catal12050491] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/04/2022] Open
Abstract
An organocatalytic [4 + 2] cascade annulation of salicylaldehydes and 1,3-bisarylsulfonylpropenes has been developed. This protocol enables the efficient and straightforward synthesis of a new series of 3-sulfonyl-2-sulfonylmethyl-2H-chromenes that are useful for exploring pharmacologically valued compounds. Further reductive modifications result in 3-desulfonylated chromene or chromane derivatives. This protocol can be expanded to the synthesis of 3-sulfonyl-2-sulfonylmethyl 1,2-dihydroquinoline.
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15
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Banwell MG, Schwartz BD, Bissember AC, Herlt T, Willis AC, Gardiner MG, Illesinghe J, Robinson AJ. Syntheses of the (±)‐, (+)‐, and (−)‐Forms of 2‐Amino‐3‐(8‐hydroxyquinolin‐3‐yl)propanoic Acid (8HQ‐3Ala) from a Common Dehydroamino Acid Methyl Ester Precursor. ASIAN J ORG CHEM 2022. [DOI: 10.1002/ajoc.202100455] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Martin G. Banwell
- Institute for Advanced and Applied Chemical Synthesis Jinan University, Guangzhou Guangdong 510632 China
| | - Brett D. Schwartz
- Research School of Chemistry Institute of Advanced Studies The Australian National University Canberra ACT 2601 Australia
| | - Alex C. Bissember
- Research School of Chemistry Institute of Advanced Studies The Australian National University Canberra ACT 2601 Australia
| | - Tony Herlt
- Research School of Chemistry Institute of Advanced Studies The Australian National University Canberra ACT 2601 Australia
| | - Anthony C. Willis
- Research School of Chemistry Institute of Advanced Studies The Australian National University Canberra ACT 2601 Australia
| | - Michael G. Gardiner
- Research School of Chemistry Institute of Advanced Studies The Australian National University Canberra ACT 2601 Australia
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16
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Sung DB, Han JH, Kim YK, Mun BH, Park S, Kim HS, Lee JS. Gold(I)-Catalyzed Intramolecular Hydrothiophenylation of N-Thiophen-3-yl Alkynylamides for Accessing Thieno[3,2- b]pyridine-5(4 H)-ones: Development of F-Actin Specific Fluorescent Probes. J Org Chem 2022; 87:4936-4950. [PMID: 35148090 DOI: 10.1021/acs.joc.1c02923] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Herein, we describe an original synthetic method for a series of fluorescent thieno[3,2-b]pyridine-5(4H)-one derivatives prepared via the gold(I)-catalyzed 6-endo-dig intramolecular hydrothiophenylation process involving N-thiophen-3-yl alkynylamides. The brightness was improved; emission could be tuned, and larger Stokes shifts were recorded. We also designed and synthesized the phalloidin-based fluorescent chemical probes KF-P1 and KF-P2 to realize fluorescent F-actin imaging.
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Affiliation(s)
- Dan-Bi Sung
- Marine Natural Products Chemistry Laboratory, Korea Institute of Ocean Science and Technology, Busan 49111, Republic of Korea
| | - Jang Hee Han
- Severance Biomedical Science Institute, Yonsei University College of Medicine, Seoul 03722, Republic of Korea.,Graduate School of Medical Science, Brain Korea 21 PLUS Project for Medical Science, Yonsei University College of Medicine, Seoul 03722, Republic of Korea
| | - Yong-Keon Kim
- Severance Biomedical Science Institute, Yonsei University College of Medicine, Seoul 03722, Republic of Korea.,Graduate School of Medical Science, Brain Korea 21 PLUS Project for Medical Science, Yonsei University College of Medicine, Seoul 03722, Republic of Korea
| | - Bo Hyun Mun
- Marine Natural Products Chemistry Laboratory, Korea Institute of Ocean Science and Technology, Busan 49111, Republic of Korea
| | - Sol Park
- Marine Natural Products Chemistry Laboratory, Korea Institute of Ocean Science and Technology, Busan 49111, Republic of Korea.,Department of Marine Biotechnology, Korea University of Science and Technology, Deajeon 34113, Republic of Korea
| | - Hyun Seok Kim
- Severance Biomedical Science Institute, Yonsei University College of Medicine, Seoul 03722, Republic of Korea.,Graduate School of Medical Science, Brain Korea 21 PLUS Project for Medical Science, Yonsei University College of Medicine, Seoul 03722, Republic of Korea
| | - Jong Seok Lee
- Marine Natural Products Chemistry Laboratory, Korea Institute of Ocean Science and Technology, Busan 49111, Republic of Korea.,Department of Marine Biotechnology, Korea University of Science and Technology, Deajeon 34113, Republic of Korea
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17
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Ghosh T, Chatterjee J, Bhakta S. Gold-Catalyzed Hydroarylation Reactions: A Comprehensive Overview. Org Biomol Chem 2022; 20:7151-7187. [DOI: 10.1039/d2ob00960a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The hydroarylation of alkynes, alkene, and, allene is a cost-effective and efficient way to incorporate unsaturated moieties into aromatic substrates. This review focuses on gold-catalyzed hydroarylation, which produces aromatic alkenes,...
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18
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Zheng SL, Chen L. Synthesis of 2 H-chromenes: recent advances and perspectives. Org Biomol Chem 2021; 19:10530-10548. [PMID: 34842267 DOI: 10.1039/d1ob01906f] [Citation(s) in RCA: 19] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
As one type of chromene, 2H-chromenes represent important oxygen heterocycles, which not only widely exist in natural products, pharmaceutical agents and biologically relevant molecules, but have also been used broadly in materials science and organic synthesis. Two major synthetic strategies have been developed towards such compounds. This review mainly focuses on the recent advances in this field, including benzopyran ring formation involving cyclization reactions and the late-stage functionalization of the parent 2H-chromenes.
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Affiliation(s)
- Shi-Lu Zheng
- College of Food and Biological Engineering, Chengdu University, P. R. China.,Key Laboratory of Medicinal and Edible Plants Resources Development of Sichuan Education Department, Sichuan Industrial Institute of Antibiotics, Chengdu University, P. R. China.
| | - Long Chen
- Antibiotics Research and Re-evaluation Key Laboratory of Sichuan Province, Sichuan Industrial Institute of Antibiotics, School of Pharmacy, Chengdu University, 2025 Chengluo Avenue, Chengdu 610016, P. R. China.,Key Laboratory of Medicinal and Edible Plants Resources Development of Sichuan Education Department, Sichuan Industrial Institute of Antibiotics, Chengdu University, P. R. China.
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19
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Baire B, Yadav B. TfOH catalysed domino-double annulation of arenes with propargylic alcohols: a unified approach to indene polycyclic systems. Chem Commun (Camb) 2021; 57:12796-12799. [PMID: 34782905 DOI: 10.1039/d1cc05253e] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The design and development of a TfOH catalysed domino strategy for the double annulation of arenes with propargylic alcohols for the rapid generation of indene based polycyclic systems is reported. The dehydration, intramolecular 6-endo-dig hydroarylation, and cationic cyclization were consecutively promoted by TfOH. The key features of this strategy are the formation of two C-C bonds, unified access to indene polycyclic systems, excellent yields (up to 95%), high atom economy (>90%), an operationally simple procedure, and water being the only byproduct. By extending this strategy, a two-step synthesis of the pentacyclic systems of hypoxylonol A (43% overall yield from α-tetralone), daldinone A (63% overall yield from β-tetralone) and spiro-tetracyclic framework of incarviatone A has also been achieved.
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Affiliation(s)
- Beeraiah Baire
- Department of Chemistry, Indian Institute of Technology Madras, Chennai-600036, Tamilnadu, India.
| | - Bhavna Yadav
- Department of Chemistry, Indian Institute of Technology Madras, Chennai-600036, Tamilnadu, India.
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20
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Zhao Y, Zhou Z, Liu L, Chen M, Yang W, Chen Q, Gardiner MG, Banwell MG. The Copper-Catalyzed Reaction of 2-(1-Hydroxyprop-2-yn-1-yl)phenols with Sulfonyl Azides Leading to C3-Unsubstituted N-Sulfonyl-2-iminocoumarins. J Org Chem 2021; 86:9155-9162. [PMID: 34137260 DOI: 10.1021/acs.joc.1c00331] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
An operationally simple synthesis of Z-configured and C3-unsubstituted N-sulfonyl-2-iminocoumarins (e.g., 8a) that proceeds under mild conditions is achieved by reacting 2-(1-hydroxyprop-2-yn-1-yl)phenols (e.g., 6a) with sulfonyl azides (e.g., 7a). The cascade process involved likely starts with a copper-catalyzed alkyne-azide cycloaddition (CuAAC) reaction. This is followed by ring-opening of the resulting metalated triazole (with accompanying loss of nitrogen), reaction of the ensuing ketenimine with the pendant phenolic hydroxyl group, and finally dehydration of the (Z)-N-(4-hydroxychroman-2-ylidene)sulfonamide so formed.
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Affiliation(s)
- Yu Zhao
- Guangdong Key Laboratory for Research and the Development of Natural Drugs, The Marine Biomedical Research Institute, Guangdong Medical University, Zhanjiang, Guangdong 524023, China
| | - Zitong Zhou
- Guangdong Key Laboratory for Research and the Development of Natural Drugs, The Marine Biomedical Research Institute, Guangdong Medical University, Zhanjiang, Guangdong 524023, China
| | - Lvling Liu
- The Marine Biomedical Research Institute of Guangdong, Zhanjiang, Guangdong 524023, China
| | - Man Chen
- Guangdong Key Laboratory for Research and the Development of Natural Drugs, The Marine Biomedical Research Institute, Guangdong Medical University, Zhanjiang, Guangdong 524023, China
| | - Weiguang Yang
- Guangdong Key Laboratory for Research and the Development of Natural Drugs, The Marine Biomedical Research Institute, Guangdong Medical University, Zhanjiang, Guangdong 524023, China.,The Marine Biomedical Research Institute of Guangdong, Zhanjiang, Guangdong 524023, China.,Southern Marine Science and Engineering Guangdong Laboratory, Zhanjiang, Guangdong 524023, China
| | - Qi Chen
- Institute for Advanced and Applied Chemical Synthesis, Jinan UniversityGuangzhou/Zhuhai, 510632/519070, China
| | - Michael G Gardiner
- Research School of Chemistry, Institute of Advanced Studies, The Australian National University, Canberra 2601, Australia
| | - Martin G Banwell
- Guangdong Key Laboratory for Research and the Development of Natural Drugs, The Marine Biomedical Research Institute, Guangdong Medical University, Zhanjiang, Guangdong 524023, China.,Institute for Advanced and Applied Chemical Synthesis, Jinan UniversityGuangzhou/Zhuhai, 510632/519070, China.,Research School of Chemistry, Institute of Advanced Studies, The Australian National University, Canberra 2601, Australia
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21
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Velasco N, Suárez A, Martínez-Lara F, Fernández-Rodríguez MÁ, Sanz R, Suárez-Pantiga S. From Propargylic Alcohols to Substituted Thiochromenes: gem-Disubstituent Effect in Intramolecular Alkyne Iodo/hydroarylation. J Org Chem 2021; 86:7078-7091. [PMID: 33928778 PMCID: PMC8474117 DOI: 10.1021/acs.joc.1c00333] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
This work describes the 6-endo-dig cyclization of S-aryl propargyl sulfides to afford 2H-thiochromenes. The substitution at the propargylic position plays a crucial role in allowing intramolecular silver-catalyzed alkyne hydroarylation and N-iodosuccinimide-promoted iodoarylation. Additionally, a PTSA-catalyzed thiolation reaction of propargylic alcohols was developed to synthesize the required tertiary S-aryl propargyl ethers. The applicability of merging these two methods is demonstrated by synthesizing the retinoic acid receptor antagonist AGN194310.
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Affiliation(s)
- Noelia Velasco
- Área de Química Orgánica, Departamento de Química, Facultad de Ciencias, Universidad de Burgos, Pza. Misael Bañuelos s/n, 09001 Burgos, Spain
| | - Anisley Suárez
- Área de Química Orgánica, Departamento de Química, Facultad de Ciencias, Universidad de Burgos, Pza. Misael Bañuelos s/n, 09001 Burgos, Spain
| | - Fernando Martínez-Lara
- Área de Química Orgánica, Departamento de Química, Facultad de Ciencias, Universidad de Burgos, Pza. Misael Bañuelos s/n, 09001 Burgos, Spain
| | - Manuel Ángel Fernández-Rodríguez
- Departamento de Química Orgánica y Química Inorgánica, Instituto de Investigación Química "Andrés M. del Río" (IQAR), Universidad de Alcalá (IRYCIS), 28805 Alcalá de Henares, Madrid, Spain
| | - Roberto Sanz
- Área de Química Orgánica, Departamento de Química, Facultad de Ciencias, Universidad de Burgos, Pza. Misael Bañuelos s/n, 09001 Burgos, Spain
| | - Samuel Suárez-Pantiga
- Área de Química Orgánica, Departamento de Química, Facultad de Ciencias, Universidad de Burgos, Pza. Misael Bañuelos s/n, 09001 Burgos, Spain
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