1
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Kumar SV, Olusegun J, Guiry PJ. Zn(II)-catalyzed asymmetric [3 + 2] cycloaddition of acyclic enones with azomethine ylides. Org Biomol Chem 2024. [PMID: 38920098 DOI: 10.1039/d4ob00854e] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/27/2024]
Abstract
The Zn(II)/UCD-Imphanol-catalyzed highly endo-selective [3 + 2] asymmetric cycloaddition of acyclic enones and azomethine ylides has been developed. Moderate to high yields (up to 94%) with excellent endo/exo selectivities (99 : 1) and enantioselectivities up to 96.5 : 3.5 er were obtained.
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Affiliation(s)
- Sundaravel Vivek Kumar
- Centre for Synthesis and Chemical Biology, School of Chemistry, University College Dublin, Belfield, Dublin 4, Ireland.
| | - Jeremiah Olusegun
- Centre for Synthesis and Chemical Biology, School of Chemistry, University College Dublin, Belfield, Dublin 4, Ireland.
| | - Patrick J Guiry
- Centre for Synthesis and Chemical Biology, School of Chemistry, University College Dublin, Belfield, Dublin 4, Ireland.
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2
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Bora SK, Biswas S, Behera BK, Saikia AK. Stereoselective synthesis of gem-dihalopiperidines via the halo-aza-Prins cyclization reaction: access to piperidin-4-ones and pyridines. Org Biomol Chem 2024; 22:3893-3903. [PMID: 38654601 DOI: 10.1039/d4ob00338a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/26/2024]
Abstract
An efficient methodology for the synthesis of 4,4-dihalopiperidine derivatives in excellent yields has been developed using N-(3-halobut-3-en-1-yl)-4-methylbenzenesulfonamide and an aldehyde catalyzed by In(OTf)3. The reaction involves an initial formation of a six-membered carbocation via the aza-Prins cyclization reaction followed by a nucleophilic attack by a halide ion to give 4,4-dihalopiperidine. The dihalopiperidine is converted to tetrahydropiperidinone using Ac2O/Et3N in DCM/H2O (1 : 1). It is also utilized for the synthesis of pyridine scaffolds by treatment with DBU. Furthermore, the dihalopiperidine is transformed to its enol ether derivatives using KOH in alcohol.
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Affiliation(s)
- Surjya Kumar Bora
- Department of Chemistry, Indian Institute of Technology Guwahati, Guwahati-781039, Assam, India.
| | - Subhamoy Biswas
- Department of Chemistry, Indian Institute of Technology Guwahati, Guwahati-781039, Assam, India.
| | - Bipin Kumar Behera
- Department of Chemistry, Indian Institute of Technology Guwahati, Guwahati-781039, Assam, India.
| | - Anil K Saikia
- Department of Chemistry, Indian Institute of Technology Guwahati, Guwahati-781039, Assam, India.
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3
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Ohno I, Kanemoto K, Furuya S, Suzuki Y, Fukuzawa SI. Construction of Diverse Pyrrolidine-Based Skeletons through the Ag-Catalyzed Stereoselective Addition-Elimination Reaction of Azomethine Ylides with Nitroallyl Acetates. Org Lett 2024; 26:1880-1885. [PMID: 38417450 DOI: 10.1021/acs.orglett.4c00184] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/01/2024]
Abstract
Because scaffold diversity has a pronounced impact on biological screening, the efficient and expedient construction of skeletally diverse compound collections is a fundamental demand in drug discovery. In this regard, we report here an asymmetric tandem conjugate addition-elimination reaction of pyrroline esters with nitroallyl acetates and its application to the construction of various types of fused or spirocyclic pyrrolidines. A AgOAc/(R,Sp)-ThioClickFerrophos (TCF) catalyst efficiently promotes the addition-elimination reaction, setting vicinal chiral stereocenters featuring a tetrasubstituted carbon with excellent enantio- and diastereoselectivity while leaving the versatile nitroolefin moiety. The broad substrate scope of this reaction and the transformability of the resulting nitroolefin, imine, and ester moieties allow for the construction of diverse pyrrolidine-based fused or spiro bicyclic skeletons in optically active forms by various intramolecular cyclization processes.
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Affiliation(s)
- Itsuki Ohno
- Faculty of Science and Engineering, Chuo University, 1-13-27 Kasuga, Bunkyo-ku, Tokyo 112-8551, Japan
| | - Kazuya Kanemoto
- Faculty of Science and Engineering, Chuo University, 1-13-27 Kasuga, Bunkyo-ku, Tokyo 112-8551, Japan
- Graduate School of Pharmaceutical Sciences, Tohoku University, 6-3 Aoba, Aramaki, Aoba-ku, Sendai 980-8578, Japan
| | - Shohei Furuya
- Faculty of Science and Engineering, Chuo University, 1-13-27 Kasuga, Bunkyo-ku, Tokyo 112-8551, Japan
| | - Yuko Suzuki
- Faculty of Science and Engineering, Chuo University, 1-13-27 Kasuga, Bunkyo-ku, Tokyo 112-8551, Japan
| | - Shin-Ichi Fukuzawa
- Faculty of Science and Engineering, Chuo University, 1-13-27 Kasuga, Bunkyo-ku, Tokyo 112-8551, Japan
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4
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Wang E, Luo J, Zhang L, Zhang J, Jiang Y. Copper-Catalyzed Oxidative [3 + 2] Cycloaddition of Enamines and Pyridotriazoles toward Indolizines. Org Lett 2024; 26:1249-1254. [PMID: 38305700 DOI: 10.1021/acs.orglett.4c00063] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/03/2024]
Abstract
An efficient copper catalytic system has been established for the synthesis of highly functional indolizines through oxidative [3 + 2] cycloaddition of enamines and pyridotriazoles. This modular platform is compatible with a broad range of functional groups, including natural and complex skeletons, allowing for late-stage modifications. It features a step-economical, highly regioselective, and easy-handling procedure and has been applied in constructing small molecules of potent activity toward inhibiting the VEGF-NRP1 interaction through a one-pot reaction of pyridotriazoles, amines, and aldehydes.
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Affiliation(s)
- Enfu Wang
- National Key Laboratory of Green Pesticide, Key Laboratory of Green Pesticide and Agricultural Bioengineering, Ministry of Education, Guizhou University, Guiyang 550025, China
| | - Jiangbin Luo
- National Key Laboratory of Green Pesticide, Key Laboratory of Green Pesticide and Agricultural Bioengineering, Ministry of Education, Guizhou University, Guiyang 550025, China
| | - Luoman Zhang
- National Key Laboratory of Green Pesticide, Key Laboratory of Green Pesticide and Agricultural Bioengineering, Ministry of Education, Guizhou University, Guiyang 550025, China
| | - Jian Zhang
- National Key Laboratory of Green Pesticide, Key Laboratory of Green Pesticide and Agricultural Bioengineering, Ministry of Education, Guizhou University, Guiyang 550025, China
| | - Yaojia Jiang
- National Key Laboratory of Green Pesticide, Key Laboratory of Green Pesticide and Agricultural Bioengineering, Ministry of Education, Guizhou University, Guiyang 550025, China
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5
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Yamamoto K, Torigoe K, Kuriyama M, Demizu Y, Onomura O. (3+2) Cycloaddition of Heteroaromatic N-Ylides with Sulfenes. Org Lett 2024; 26:798-803. [PMID: 38252687 DOI: 10.1021/acs.orglett.3c03878] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2024]
Abstract
A (3+2) cycloaddition of heteroaromatic N-ylides with sulfenes, which are generated in situ from sulfonyl chlorides, has been developed. A variety of ylides were transformed into the corresponding sulfone-embedded N-fused heterocycles in high yields. Hexafluoroisopropyl mesylate was demonstrated to be a suitable reactant for quinolinium ylides. Furthermore, this cycloaddition could be performed with an ylide prepared by a Cu-catalyzed ylide transfer reaction in a one-pot manner, extending the substrate scope to an unisolable ylide.
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Affiliation(s)
- Kosuke Yamamoto
- Graduate School of Biomedical Sciences, Nagasaki University, 1-14 Bunkyo-machi, Nagasaki 852-8521, Japan
| | - Kohei Torigoe
- Graduate School of Biomedical Sciences, Nagasaki University, 1-14 Bunkyo-machi, Nagasaki 852-8521, Japan
| | - Masami Kuriyama
- Graduate School of Biomedical Sciences, Nagasaki University, 1-14 Bunkyo-machi, Nagasaki 852-8521, Japan
| | - Yosuke Demizu
- Division of Organic Chemistry, National Institute of Health Sciences, 3-25-26 Tonomachi, Kawasaki, Kanagawa 210-9501, Japan
| | - Osamu Onomura
- Graduate School of Biomedical Sciences, Nagasaki University, 1-14 Bunkyo-machi, Nagasaki 852-8521, Japan
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6
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Li F, Yang Q, Liu MY, An PX, Du YL, Wang YB. Ag(I)-Mediated Annulation of 2-(2-Enynyl)pyridines and Propargyl Amines to Access 1-(2 H-Pyrrol-3-yl)indolizines. J Org Chem 2024; 89:304-312. [PMID: 38126126 DOI: 10.1021/acs.joc.3c02024] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2023]
Abstract
An effective Ag(I)-mediated annulation of 2-(2-enynyl)pyridines and propargyl amines was developed, unexpectedly affording a broad range of functionalized 1-(2H-pyrrol-3-yl)indolizines in moderate to excellent yields. The developed method is characterized by operational simplicity, ready availability of starting materials, high regioselectivity, and broad substrate scope under mild reaction conditions. The Ag(I)-promoted cyclization of 2-(2-enynyl)pyridines and propargyl amines possibly results in the formation of the spiroindolizine, the ring-opening rearrangement of which may give the 1-(2H-pyrrol-3-yl)indolizine. Furthermore, a gram-scale reaction and synthetic transformations are also studied.
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Affiliation(s)
- Feng Li
- College of Chemistry and Molecular Science, Henan University, Kaifeng, Henan 475004, China
| | - Qing Yang
- College of Chemistry and Molecular Science, Henan University, Kaifeng, Henan 475004, China
| | - Ming-Yue Liu
- College of Chemistry and Molecular Science, Henan University, Kaifeng, Henan 475004, China
| | - Pei-Xuan An
- College of Chemistry and Molecular Science, Henan University, Kaifeng, Henan 475004, China
| | - Ya-Long Du
- College of Chemistry and Molecular Science, Henan University, Kaifeng, Henan 475004, China
| | - Yan-Bo Wang
- College of Chemistry and Molecular Science, Henan University, Kaifeng, Henan 475004, China
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7
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Xu Y, Wang X, Sa K, Li H, Chen L. Alkaloids from the roots of Sophora flavescens and their anti-tumor activity. Fitoterapia 2023; 171:105685. [PMID: 37743030 DOI: 10.1016/j.fitote.2023.105685] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/11/2023] [Revised: 09/18/2023] [Accepted: 09/20/2023] [Indexed: 09/26/2023]
Abstract
Sophora flavescens belongs to Sophora genus of Leguminosae. Its roots are used as a traditional Chinese medicine. In our study on Sophora flavescens roots, 3 new and 19 known alkaloids have been found, including 8 aloperine-type and 14 matrine-type alkaloids. The planar configurations of these compounds were determined by the spectral data, and the absolute configurations of new compounds 1, 2 and 4 were determined by pyridine solvent effect, ECD and snatzke methods, respectively. All compounds were tested for their inhibitory activity on MCF-7 cell growth, and compound 12 exhibited certain inhibitory effects on the growth of MCF-7 cells after 24 h of treatment at a concentration of 20 μM, with inhibition rates of 31.28%. Through target screening and molecular docking, human Rho GTPase activating protein 5 variant and human arachidonate 12-lipoxygenase (12S-type) might be important targets for compound 12 to exert anti-tumor activity.
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Affiliation(s)
- Yang Xu
- Wuya College of Innovation, Key Laboratory of Structure-Based Drug Design & Discovery, Ministry of Education, Shenyang Pharmaceutical University, Shenyang 110016, China
| | - Xiuli Wang
- Wuya College of Innovation, Key Laboratory of Structure-Based Drug Design & Discovery, Ministry of Education, Shenyang Pharmaceutical University, Shenyang 110016, China
| | - Kuiru Sa
- Wuya College of Innovation, Key Laboratory of Structure-Based Drug Design & Discovery, Ministry of Education, Shenyang Pharmaceutical University, Shenyang 110016, China
| | - Hua Li
- Wuya College of Innovation, Key Laboratory of Structure-Based Drug Design & Discovery, Ministry of Education, Shenyang Pharmaceutical University, Shenyang 110016, China; Institute of Structural Pharmacology & TCM Chemical Biology, College of Pharmacy, Fujian University of Traditional Chinese Medicine, Fuzhou 350122, China.
| | - Lixia Chen
- Wuya College of Innovation, Key Laboratory of Structure-Based Drug Design & Discovery, Ministry of Education, Shenyang Pharmaceutical University, Shenyang 110016, China.
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8
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Garay-Talero A, Goulart TAC, Gallo RDC, Pinheiro RDC, Hoyos-Orozco C, Jurberg ID, Gamba-Sánchez D. An aza-Robinson Annulation Strategy for the Synthesis of Fused Bicyclic Amides: Synthesis of (±)-Coniceine and Quinolizidine. Org Lett 2023; 25:7940-7945. [PMID: 37877616 PMCID: PMC10630962 DOI: 10.1021/acs.orglett.3c02798] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/25/2023] [Indexed: 10/26/2023]
Abstract
An aza-Robinson annulation strategy is described using a NaOEt-catalyzed conjugate addition of cyclic imides onto vinyl ketones, followed by a TfOH-mediated intramolecular aldol condensation to afford densely functionalized fused bicyclic amides. The potential use of these amides in the synthesis of alkaloids is demonstrated by the sequential conversion of appropriate precursors to (±)-coniceine and quinolizidine in two additional steps, thus allowing their preparation in overall 40 and 44% yields, respectively.
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Affiliation(s)
- Alexander Garay-Talero
- Laboratory
of Organic Synthesis, Bio and Organocatalysis, Chemistry Department, Universidad de los Andes, Cra 1 No. 18A-12 Q:305, 111711 Bogota, Colombia
| | - Tales A. C. Goulart
- Institute
of Chemistry, State University of Campinas, Rua Monteiro Lobato 270, 13083-862 Campinas, SP, Brazil
| | - Rafael D. C. Gallo
- Institute
of Chemistry, State University of Campinas, Rua Monteiro Lobato 270, 13083-862 Campinas, SP, Brazil
| | - Roberto do C. Pinheiro
- Institute
of Chemistry, State University of Campinas, Rua Monteiro Lobato 270, 13083-862 Campinas, SP, Brazil
| | - Catalina Hoyos-Orozco
- Laboratory
of Organic Synthesis, Bio and Organocatalysis, Chemistry Department, Universidad de los Andes, Cra 1 No. 18A-12 Q:305, 111711 Bogota, Colombia
| | - Igor D. Jurberg
- Institute
of Chemistry, State University of Campinas, Rua Monteiro Lobato 270, 13083-862 Campinas, SP, Brazil
| | - Diego Gamba-Sánchez
- Laboratory
of Organic Synthesis, Bio and Organocatalysis, Chemistry Department, Universidad de los Andes, Cra 1 No. 18A-12 Q:305, 111711 Bogota, Colombia
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9
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Rodríguez-Caro JF, Afonso MM, Palenzuela JA. A Simple Entry to the 5,8-Disubstituted Indolizidine Skeleton via Hetero Diels-Alder Reaction. Molecules 2023; 28:7316. [PMID: 37959735 PMCID: PMC10647431 DOI: 10.3390/molecules28217316] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/10/2023] [Revised: 10/25/2023] [Accepted: 10/26/2023] [Indexed: 11/15/2023] Open
Abstract
The 5,8-disubstituted indolizidines are the largest family of indolizidines isolated from the skin of amphibians. These compounds exhibit interesting biological activities such as noncompetitive blockers of nicotinic receptors. In this paper, we present a short, simple, and general synthesis of these alkaloids based on the hetero Diels-Alder reaction between suitable monoactivated dienes and Δ1-pyrroline as the dienophile. The selectivity of the process is explained based on computational studies. Concise synthesis of the indolizidine alkaloid 181B from a hetero Diels-Alder reaction was accomplished in four steps.
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Affiliation(s)
| | - María M. Afonso
- Departamento de Química Orgánica, Instituto Universitario de Bio-Orgánica Antonio González (SINTESTER), Universidad de La Laguna, Avda. Astrofísico Fco. Sánchez 2, 38206 La Laguna, Spain;
| | - José Antonio Palenzuela
- Departamento de Química Orgánica, Instituto Universitario de Bio-Orgánica Antonio González (SINTESTER), Universidad de La Laguna, Avda. Astrofísico Fco. Sánchez 2, 38206 La Laguna, Spain;
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10
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Zhao W, Wang W, Zhou H, Liu Q, Ma Z, Huang H, Chang M. An Asymmetric Hydrogenation/N-Alkylation Sequence for a Step-Economical Route to Indolizidines and Quinolizidines. Angew Chem Int Ed Engl 2023; 62:e202308836. [PMID: 37643998 DOI: 10.1002/anie.202308836] [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: 06/23/2023] [Revised: 08/26/2023] [Accepted: 08/28/2023] [Indexed: 08/31/2023]
Abstract
The direct catalytic asymmetric hydrogenation of pyridines for the synthesis of piperidines remains a challenge. Herein, we report a one-pot asymmetric hydrogenation of pyridines with subsequent N-alkylation using a traceless Brønsted acid activation strategy. Catalyzed by an iridium-BINAP complex, the substrates undergo ketone reduction, cyclization and pyridine hydrogenation in sequence to form indolizidines and quinolizidines. The absolute configuration of the stereocenter of the alcohol is retained and influences the formation of the second stereocenter. Experimental and theoretical mechanistic studies reveal that the chloride anion and certain noncovalent interactions govern the stereoselectivity of the cascade reaction throughout the catalytic process.
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Affiliation(s)
- Wei Zhao
- College of Chemistry and Pharmacy, Northwest A&F University, 22 Xinong Road, Yangling, Shaanxi, 712100, P. R. China
| | - Wenji Wang
- College of Chemistry and Pharmacy, Northwest A&F University, 22 Xinong Road, Yangling, Shaanxi, 712100, P. R. China
| | - Huan Zhou
- College of Plant Protection, Shaanxi Research Center of Biopesticide Engineering and Technology, Northwest A&F University, Yangling, Shaanxi, 712100, P. R. China
| | - Qishan Liu
- College of Chemistry and Pharmacy, Northwest A&F University, 22 Xinong Road, Yangling, Shaanxi, 712100, P. R. China
| | - Zhiqing Ma
- College of Plant Protection, Shaanxi Research Center of Biopesticide Engineering and Technology, Northwest A&F University, Yangling, Shaanxi, 712100, P. R. China
| | - Haizhou Huang
- College of Chemistry and Pharmacy, Northwest A&F University, 22 Xinong Road, Yangling, Shaanxi, 712100, P. R. China
| | - Mingxin Chang
- College of Chemistry and Pharmacy, Northwest A&F University, 22 Xinong Road, Yangling, Shaanxi, 712100, P. R. China
- College of Plant Protection, Shaanxi Research Center of Biopesticide Engineering and Technology, Northwest A&F University, Yangling, Shaanxi, 712100, P. R. China
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11
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Zhang S, Yuan J, Huang G, Ma C, Yang J, Yang L, Xiao Y, Qu L. Visible-Light-Induced Intramolecular Tandem Cyclization of Unactivated Indoloalkynes for the Synthesis of Sulfonylated and Selenylated Indolo[1,2- a]quinolines. J Org Chem 2023; 88:11712-11727. [PMID: 37530760 DOI: 10.1021/acs.joc.3c00997] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 08/03/2023]
Abstract
A convenient and efficient visible-light-induced method has been developed for the construction of sulfonated and selenylated indolo[1,2-a]quinolines through sulfonyl or selenyl radical-initiated tandem cyclization of unactivated alkynes with sodium sulfinates or diaryl diselenides under mild conditions. This protocol, which simply utilizes visible light as the safe and eco-friendly energy source and an inexpensive and nontoxic organic dye as a photocatalyst without the aid of an external photocatalyst, provides various sulfonyl- and selenyl-containing indolo[1,2-a]quinolines in moderate to good yields.
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Affiliation(s)
- Shouren Zhang
- Henan Key Laboratory of Nanocomposites and Applications, Institute of Nanostructured Functional Materials, Huanghe Science and Technology College, Zhengzhou 450006, P. R. China
| | - Jinwei Yuan
- School of Chemistry & Chemical Engineering, Henan University of Technology, Zhengzhou 450001, P. R. China
| | - Guangchao Huang
- School of Chemistry & Chemical Engineering, Henan University of Technology, Zhengzhou 450001, P. R. China
| | - Chengjia Ma
- School of Chemistry & Chemical Engineering, Henan University of Technology, Zhengzhou 450001, P. R. China
| | - Jingjing Yang
- School of Chemistry & Chemical Engineering, Henan University of Technology, Zhengzhou 450001, P. R. China
| | - Liangru Yang
- School of Chemistry & Chemical Engineering, Henan University of Technology, Zhengzhou 450001, P. R. China
| | - Yongmei Xiao
- School of Chemistry & Chemical Engineering, Henan University of Technology, Zhengzhou 450001, P. R. China
| | - Lingbo Qu
- College of Chemistry, Zhengzhou University, Zhengzhou 450001, P. R. China
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12
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Cely-Veloza W, Kato MJ, Coy-Barrera E. Quinolizidine-Type Alkaloids: Chemodiversity, Occurrence, and Bioactivity. ACS OMEGA 2023; 8:27862-27893. [PMID: 37576649 PMCID: PMC10413377 DOI: 10.1021/acsomega.3c02179] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/31/2023] [Accepted: 07/19/2023] [Indexed: 08/15/2023]
Abstract
Quinolizidine alkaloids (QAs) are nitrogen-containing compounds produced naturally as specialized metabolites distributed in plants and animals (e.g., frogs, sponges). The present review compiles the available information on the chemical diversity and biological activity of QAs reported during the last three decades. So far, 397 QAs have been isolated, gathering 20 different representative classes, including the most common such as matrine (13.6%), lupanine (9.8%), anagyrine (4.0%), sparteine (5.3%), cytisine (6.5%), tetrahydrocytisine (4.3%), lupinine (12.1%), macrocyclic bisquinolizidine (9.3%), biphenylquinolizidine lactone (7.1%), dimeric (7.1%), and other less known QAs (20.9%), which include several structural patterns of QAs. A detailed survey of the reported information about the bioactivities of these compounds indicated their potential as cytotoxic, antiviral, antimicrobial, insecticidal, anti-inflammatory, antimalarial, and antiacetylcholinesterase compounds, involving favorable putative drug-likeness scores. In this regard, research progress on the structural and biological/pharmacological diversity of QAs requires further studies oriented on expanding the chemical space to find bioactive scaffolds based on QAs for pharmacological and agrochemical applications.
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Affiliation(s)
- Willy Cely-Veloza
- Bioorganic
Chemistry Laboratory, Facultad de Ciencias Básicas y Aplicadas, Universidad Militar Nueva Granada, Campus Nueva Granada, Cajicá 250247, Colombia
| | - Massuo J. Kato
- Institute
of Chemistry, University of São Paulo, São Paulo 05508-000, SP, Brazil
| | - Ericsson Coy-Barrera
- Bioorganic
Chemistry Laboratory, Facultad de Ciencias Básicas y Aplicadas, Universidad Militar Nueva Granada, Campus Nueva Granada, Cajicá 250247, Colombia
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13
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Wang BR, Li YB, Zhang Q, Gao D, Tian P, Li Q, Yin L. Copper(I)-catalyzed asymmetric 1,3-dipolar cycloaddition of 1,3-enynes and azomethine ylides. Nat Commun 2023; 14:4688. [PMID: 37542041 PMCID: PMC10403559 DOI: 10.1038/s41467-023-40409-4] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/05/2022] [Accepted: 07/25/2023] [Indexed: 08/06/2023] Open
Abstract
Herein, we report a copper(I)-catalyzed asymmetric 1,3-dipolar cycloaddition of azomethine ylides and 1,3-enynes, which provides a series of chiral poly-substituted pyrrolidines in high regio-, diastereo-, and enantioselectivities. Both 4-aryl-1,3-enynes and 4-silyl-1,3-enynes serve as suitable dipolarophiles while 4-alkyl-1,3-enynes are inert. Moreover, the method is successfully applied in the construction of both tetrasubstituted stereogenic carbon centers and chiral spiro pyrrolidines. The DFT calculations are also conducted, which imply a concerted mechanism rather than a stepwise mechanism. Finally, various transformations started from the pyrrolidine bearing a triethylsilylethynyl group and centered on the alkyne group are achieved, which compensates for the inertness of 4-alkyl-1,3-enynes in the present reaction.
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Affiliation(s)
- Bo-Ran Wang
- The Research Center of Chiral Drugs, Shanghai Frontiers Science Center of TCM Chemical Biology, Innovation Research Institute of Traditional Chinese Medicine, Shanghai University of Traditional Chinese Medicine, 1200 Cailun Road, Shanghai, 201203, China
- CAS Key Laboratory of Synthetic Chemistry of Natural Substances, Center for Excellence in Molecular Synthesis, Shanghai Institute of Organic Chemistry, University of Chinese Academy of Sciences, Chinese Academy of Sciences, 345 Lingling Road, Shanghai, 200032, China
| | - Yan-Bo Li
- CAS Key Laboratory of Synthetic Chemistry of Natural Substances, Center for Excellence in Molecular Synthesis, Shanghai Institute of Organic Chemistry, University of Chinese Academy of Sciences, Chinese Academy of Sciences, 345 Lingling Road, Shanghai, 200032, China
| | - Qi Zhang
- CAS Key Laboratory of Synthetic Chemistry of Natural Substances, Center for Excellence in Molecular Synthesis, Shanghai Institute of Organic Chemistry, University of Chinese Academy of Sciences, Chinese Academy of Sciences, 345 Lingling Road, Shanghai, 200032, China
| | - Dingding Gao
- The Research Center of Chiral Drugs, Shanghai Frontiers Science Center of TCM Chemical Biology, Innovation Research Institute of Traditional Chinese Medicine, Shanghai University of Traditional Chinese Medicine, 1200 Cailun Road, Shanghai, 201203, China
| | - Ping Tian
- The Research Center of Chiral Drugs, Shanghai Frontiers Science Center of TCM Chemical Biology, Innovation Research Institute of Traditional Chinese Medicine, Shanghai University of Traditional Chinese Medicine, 1200 Cailun Road, Shanghai, 201203, China.
| | - Qinghua Li
- The Research Center of Chiral Drugs, Shanghai Frontiers Science Center of TCM Chemical Biology, Innovation Research Institute of Traditional Chinese Medicine, Shanghai University of Traditional Chinese Medicine, 1200 Cailun Road, Shanghai, 201203, China.
| | - Liang Yin
- The Research Center of Chiral Drugs, Shanghai Frontiers Science Center of TCM Chemical Biology, Innovation Research Institute of Traditional Chinese Medicine, Shanghai University of Traditional Chinese Medicine, 1200 Cailun Road, Shanghai, 201203, China.
- CAS Key Laboratory of Synthetic Chemistry of Natural Substances, Center for Excellence in Molecular Synthesis, Shanghai Institute of Organic Chemistry, University of Chinese Academy of Sciences, Chinese Academy of Sciences, 345 Lingling Road, Shanghai, 200032, China.
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14
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Wang X, Xue J, Rong ZQ. Divergent Access to Chiral C2- and C3-Alkylated Pyrrolidines by Catalyst-Tuned Regio- and Enantioselective C(sp 3)-C(sp 3) Coupling. J Am Chem Soc 2023. [PMID: 37307532 DOI: 10.1021/jacs.3c03900] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
Novel-substituted pyrrolidine derivatives are widely used in drugs and bioactive molecules. The efficient synthesis of these valuable skeletons, especially enantiopure derivatives, is still recognized as a key bottleneck to overcome in chemical synthesis. Herein, we report a highly efficient catalyst-tuned regio- and enantioselective hydroalkylation reaction for the divergent synthesis of chiral C2- and C3-alkylated pyrrolidines through desymmetrization of the readily available 3-pyrrolines. The catalytic system consists of CoBr2 with a modified bisoxazoline (BOX) ligand, which can achieve the asymmetric C(sp3)-C(sp3) coupling via the distal stereocontrol, providing a series of C3-alkylated pyrrolidines in high efficiency. Moreover, the nickel catalytic system allows the enantioselective hydroalkylation to synthesize the C2-alkylated pyrrolidines through the tandem alkene isomerization/hydroalkylation reaction. This divergent method uses readily available catalysts, chiral BOX ligands, and reagents, delivering enantioenriched 2-/3-alkyl substituted pyrrolidines with excellent regio- and enantioselectivity (up to 97% ee). We also demonstrate the compatibility of this transformation with complex substrates derived from a series of drugs and bioactive molecules in good efficiency, which offers a distinct entry to more functionalized chiral N-heterocycles.
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Affiliation(s)
- Xuchao Wang
- Frontiers Science Center for Flexible Electronics (FSCFE), Shaanxi Institute of Flexible Electronics (SIFE) & Shaanxi Institute of Biomedical Materials and Engineering (SIBME), Northwestern Polytechnical University (NPU), 127 West Youyi Road, Xi'an, Shaanxi 710072, China
| | - Jing Xue
- Frontiers Science Center for Flexible Electronics (FSCFE), Shaanxi Institute of Flexible Electronics (SIFE) & Shaanxi Institute of Biomedical Materials and Engineering (SIBME), Northwestern Polytechnical University (NPU), 127 West Youyi Road, Xi'an, Shaanxi 710072, China
| | - Zi-Qiang Rong
- Frontiers Science Center for Flexible Electronics (FSCFE), Shaanxi Institute of Flexible Electronics (SIFE) & Shaanxi Institute of Biomedical Materials and Engineering (SIBME), Northwestern Polytechnical University (NPU), 127 West Youyi Road, Xi'an, Shaanxi 710072, China
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15
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Guan Y, Buivydas TA, Lalisse RF, Laybourn KB, Stern C, Richins M, Burns SM, Shelby A, Hadad CM, Mattson AE. Highly Enantioselective Catalytic Alkynylation of Quinolones: Substrate Scope, Mechanistic Studies, and Applications in the Syntheses of Chiral N-Heterocyclic Alkaloids and Diamines. ACS Catal 2023; 13:7661-7668. [PMID: 37288090 PMCID: PMC10243307 DOI: 10.1021/acscatal.3c01536] [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: 04/04/2023] [Revised: 04/21/2023] [Indexed: 06/09/2023]
Abstract
The alkynylation of 4-siloxyquinolinium triflates has been achieved under the influence of copper bis(oxazoline) catalysis. The identification of the optimal bis(oxazoline) ligand was informed through a computational approach that enabled the dihydroquinoline products to be produced with up to 96% enantiomeric excess. The conversions of the dihydroquinoline products to biologically relevant and diverse targets are reported.
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Affiliation(s)
- Yong Guan
- Department
of Chemistry and Biochemistry, Worcester
Polytechnic Institute, 60 Prescott Street, Worcester, Massachusetts 01609, United States
| | - Tadas A. Buivydas
- Department
of Chemistry and Biochemistry, Worcester
Polytechnic Institute, 60 Prescott Street, Worcester, Massachusetts 01609, United States
| | - Remy F. Lalisse
- Department
of Chemistry and Biochemistry, The Ohio
State University, Columbus, Ohio 43210, United States
| | - Kalen B. Laybourn
- Department
of Chemistry and Biochemistry, Worcester
Polytechnic Institute, 60 Prescott Street, Worcester, Massachusetts 01609, United States
| | - Charlotte Stern
- Integrated
Molecular Structure Education and Research Center, Northwestern University, Evanston, Illinois 60208, United States
| | - Margaret Richins
- Department
of Chemistry and Biochemistry, Worcester
Polytechnic Institute, 60 Prescott Street, Worcester, Massachusetts 01609, United States
| | - Sean M. Burns
- Department
of Chemistry and Biochemistry, Worcester
Polytechnic Institute, 60 Prescott Street, Worcester, Massachusetts 01609, United States
| | - Arielle Shelby
- Department
of Chemistry, Emory University, Atlanta, Georgia 30322, United States
| | - Christopher M. Hadad
- Department
of Chemistry and Biochemistry, The Ohio
State University, Columbus, Ohio 43210, United States
| | - Anita E. Mattson
- Department
of Chemistry and Biochemistry, Worcester
Polytechnic Institute, 60 Prescott Street, Worcester, Massachusetts 01609, United States
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16
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Chang X, Liu XT, Li F, Yang Y, Chung LW, Wang CJ. Electron-rich benzofulvenes as effective dipolarophiles in copper(i)-catalyzed asymmetric 1,3-dipolar cycloaddition of azomethine ylides. Chem Sci 2023; 14:5460-5469. [PMID: 37234882 PMCID: PMC10207880 DOI: 10.1039/d3sc00435j] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/26/2023] [Accepted: 04/25/2023] [Indexed: 05/28/2023] Open
Abstract
A series of benzofulvenes without any electron-withdrawing substituents were employed as 2π-type dipolarophiles for the first time to participate in Cu(i)-catalyzed asymmetric 1,3-dipolar cycloaddition (1,3-DC) reactions of azomethine ylides. An intrinsic non-benzenoid aromatic characteristic from benzofulvenes serves as a key driving force for activation of the electron-rich benzofulvenes. Utilizing the current methodology, a wide range of multi-substituted chiral spiro-pyrrolidine derivatives containing two contiguous all-carbon quaternary centers were formed in good yield with exclusive chemo-/regioselectivity and high to excellent stereoselectivity. Computational mechanistic studies elucidate the origin of the stereochemical outcome and the chemoselectivity, in which the thermostability of these cycloaddition products is the major factor.
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Affiliation(s)
- Xin Chang
- Engineering Research Center of Organosilicon Compounds & Materials, Ministry of Education, College of Chemistry and Molecular Sciences, Wuhan University Wuhan 430072 China
- State Key Laboratory of Organometallic Chemistry, Shanghai Institute of Organic Chemistry Shanghai 230021 China
| | - Xue-Tao Liu
- Engineering Research Center of Organosilicon Compounds & Materials, Ministry of Education, College of Chemistry and Molecular Sciences, Wuhan University Wuhan 430072 China
- State Key Laboratory of Organometallic Chemistry, Shanghai Institute of Organic Chemistry Shanghai 230021 China
| | - Fangfang Li
- Department of Chemistry and Guangdong Provincial Key Laboratory of Catalysis, Southern University of Science and Technology Shenzhen 518055 China
| | - Yuhong Yang
- Department of Chemistry and Guangdong Provincial Key Laboratory of Catalysis, Southern University of Science and Technology Shenzhen 518055 China
| | - Lung Wa Chung
- Department of Chemistry and Guangdong Provincial Key Laboratory of Catalysis, Southern University of Science and Technology Shenzhen 518055 China
| | - Chun-Jiang Wang
- Engineering Research Center of Organosilicon Compounds & Materials, Ministry of Education, College of Chemistry and Molecular Sciences, Wuhan University Wuhan 430072 China
- State Key Laboratory of Organometallic Chemistry, Shanghai Institute of Organic Chemistry Shanghai 230021 China
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17
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Escolano M, Gaviña D, Díaz-Oltra S, Sánchez-Roselló M, Del Pozo C. Enantioselective Synthesis of Fluorinated Indolizidinone Derivatives. Org Lett 2023; 25:3222-3227. [PMID: 37125898 DOI: 10.1021/acs.orglett.3c00903] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/02/2023]
Abstract
The enantioselective synthesis of fluorinated indolizidinone derivatives has been developed. The process involved an enantioselective intramolecular aza-Michael reaction of conjugated amides bearing a pendant α,β-unsaturated ketone moiety, catalyzed by the (S)-TRIP-derived phosphoric acid, followed by dimethyltitanocene methylenation and ring closing metathesis (RCM). Final indolizidine-derived products comprise a fluorine-containing tetrasubstituted double bond generated by the RCM reaction, which is a challenging task. The whole synthetic sequence took place in acceptable overall yields with excellent enantioselectivities.
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Affiliation(s)
- Marcos Escolano
- Department of Organic Chemistry, University of Valencia, Avda Vicente Andrés Estellés s/n, 46100 Burjassot, Valencia, Spain
| | - Daniel Gaviña
- Department of Organic Chemistry, University of Valencia, Avda Vicente Andrés Estellés s/n, 46100 Burjassot, Valencia, Spain
| | - Santiago Díaz-Oltra
- Department of Organic Chemistry, University of Valencia, Avda Vicente Andrés Estellés s/n, 46100 Burjassot, Valencia, Spain
| | - María Sánchez-Roselló
- Department of Organic Chemistry, University of Valencia, Avda Vicente Andrés Estellés s/n, 46100 Burjassot, Valencia, Spain
| | - Carlos Del Pozo
- Department of Organic Chemistry, University of Valencia, Avda Vicente Andrés Estellés s/n, 46100 Burjassot, Valencia, Spain
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18
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Uppalabat T, Hassa N, Sawektreeratana N, Leowanawat P, Janthakit P, Nalaoh P, Promarak V, Soorukram D, Reutrakul V, Kuhakarn C. Cascade Oxidative Trifluoromethylthiolation and Cyclization of 3-Alkyl-1-(2-(alkynyl)phenyl)indoles. J Org Chem 2023; 88:5403-5419. [PMID: 37019432 DOI: 10.1021/acs.joc.2c03045] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/07/2023]
Abstract
Persulfate-promoted radical cascade trifluoromethylthiolation and cyclization of 3-alkyl-1-(2-(alkynyl)phenyl)indoles with AgSCF3 were investigated. This protocol provides a novel route to CF3S-substituted indolo[1,2-a]quinoline-7-carbaldehydes and CF3S-substituted indolo[1,2-a]quinoline-7-methanone derivatives via the formation of the C-SCF3 bond and C-C bond and benzylic carbon oxidation in a single step. This reaction can accommodate a broad range of functional groups. The single-crystal X-ray diffraction data confirm the chemical structure of the product. A scale-up experiment and radical inhibition experiments were operated in the reaction system. Photophysical properties of some selected 5-((trifluoromethyl)thio)indolo[1,2-a]quinoline-7-carbaldehydes were studied by UV-visible and fluorescence spectroscopy.
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Affiliation(s)
- Thikhamporn Uppalabat
- Department of Chemistry and Center of Excellence for Innovation in Chemistry (PERCH-CIC), Faculty of Science, Mahidol University, Rama VI Road, Bangkok 10400, Thailand
| | - Nattawoot Hassa
- Department of Chemistry and Center of Excellence for Innovation in Chemistry (PERCH-CIC), Faculty of Science, Mahidol University, Rama VI Road, Bangkok 10400, Thailand
| | - Natthapat Sawektreeratana
- Department of Chemistry and Center of Excellence for Innovation in Chemistry (PERCH-CIC), Faculty of Science, Mahidol University, Rama VI Road, Bangkok 10400, Thailand
| | - Pawaret Leowanawat
- Department of Chemistry and Center of Excellence for Innovation in Chemistry (PERCH-CIC), Faculty of Science, Mahidol University, Rama VI Road, Bangkok 10400, Thailand
| | - Pattarapapa Janthakit
- Department of Materials Science and Engineering, School of Molecular Science and Engineering, Vidyasirimedhi Institute of Science and Technology, Wangchan, Rayong 21210, Thailand
| | - Phattananawee Nalaoh
- Department of Materials Science and Engineering, School of Molecular Science and Engineering, Vidyasirimedhi Institute of Science and Technology, Wangchan, Rayong 21210, Thailand
| | - Vinich Promarak
- Department of Materials Science and Engineering, School of Molecular Science and Engineering, Vidyasirimedhi Institute of Science and Technology, Wangchan, Rayong 21210, Thailand
| | - Darunee Soorukram
- Department of Chemistry and Center of Excellence for Innovation in Chemistry (PERCH-CIC), Faculty of Science, Mahidol University, Rama VI Road, Bangkok 10400, Thailand
| | - Vichai Reutrakul
- Department of Chemistry and Center of Excellence for Innovation in Chemistry (PERCH-CIC), Faculty of Science, Mahidol University, Rama VI Road, Bangkok 10400, Thailand
| | - Chutima Kuhakarn
- Department of Chemistry and Center of Excellence for Innovation in Chemistry (PERCH-CIC), Faculty of Science, Mahidol University, Rama VI Road, Bangkok 10400, Thailand
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19
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Cristóbal C, Corral C, Carretero JC, Ribagorda M, Adrio J. Enantioselective transformations of 5-hydroxymethylfurfural via catalytic asymmetric 1,3-dipolar cycloaddition of azomethine ylides. Chem Commun (Camb) 2023; 59:4336-4339. [PMID: 36943748 DOI: 10.1039/d3cc00499f] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/23/2023]
Abstract
A catalytic asymmetric 1,3-dipolar cycloaddition between iminoesters derived from 5-hydroxymethylfurfural (HMF) and different activated alkenes is reported. Excellent levels of diastereo and enantioselectivity were obtained when Fesulphos/CuI complex was used as catalyst. This metodology provides an effective and sustainable access to challenging enantioenriched heterocyclic scaffolds and represents one of the rare examples of catalytic asymmetric transformations using HMF as a starting material.
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Affiliation(s)
- Christian Cristóbal
- Departamento de Química Orgánica, Facultad de Ciencias, Universidad Autónoma de Madrid, Cantoblanco, Madrid 28049, Spain.
| | - César Corral
- Departamento de Química Orgánica, Facultad de Ciencias, Universidad Autónoma de Madrid, Cantoblanco, Madrid 28049, Spain.
| | - Juan C Carretero
- Departamento de Química Orgánica, Facultad de Ciencias, Universidad Autónoma de Madrid, Cantoblanco, Madrid 28049, Spain.
- Institute for Advanced Research in Chemical Sciences (IAdChem), Universidad Autónoma de Madrid, Madrid 28049, Spain
- Centro de Innovación en Química Avanzada (ORFEO-CINQA), Spain
| | - Maria Ribagorda
- Departamento de Química Orgánica, Facultad de Ciencias, Universidad Autónoma de Madrid, Cantoblanco, Madrid 28049, Spain.
- Institute for Advanced Research in Chemical Sciences (IAdChem), Universidad Autónoma de Madrid, Madrid 28049, Spain
| | - Javier Adrio
- Departamento de Química Orgánica, Facultad de Ciencias, Universidad Autónoma de Madrid, Cantoblanco, Madrid 28049, Spain.
- Institute for Advanced Research in Chemical Sciences (IAdChem), Universidad Autónoma de Madrid, Madrid 28049, Spain
- Centro de Innovación en Química Avanzada (ORFEO-CINQA), Spain
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20
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Wang S, Li Y, Zhang Z, Xiang J, Zheng L. Catalyst-Free α-Allylation of Dihydroisoquinolines with Morita-Baylis-Hillman Carbonates and Its Applications in the Construction of Benzo[ a]quinolizidines. J Org Chem 2023; 88:3636-3649. [PMID: 36862664 DOI: 10.1021/acs.joc.2c02843] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/03/2023]
Abstract
In this work, a mild and efficient catalyst-free α-allylation of 3,4-dihydroisoquinoline imines with Morita-Baylis-Hillman (MBH) carbonates was reported. The scopes of 3,4-dihydroisoquinolines and MBH carbonates as well as gram-scale synthesis were investigated, and densely functionalized adducts were obtained in moderate to good yields. The synthetic utility of these versatile synthons was further demonstrated by the facile synthesis of diverse benzo[a]quinolizidine skeletons.
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Affiliation(s)
- Siyu Wang
- The Center for Combinatorial Chemistry and Drug Discovery of Jilin University, The School of Pharmaceutical Sciences, Jilin University, 1266 Fujin Road, Changchun, Jilin 130021, P. R. China
| | - Yuhan Li
- The Center for Combinatorial Chemistry and Drug Discovery of Jilin University, The School of Pharmaceutical Sciences, Jilin University, 1266 Fujin Road, Changchun, Jilin 130021, P. R. China
| | - Zhuoqi Zhang
- The Center for Combinatorial Chemistry and Drug Discovery of Jilin University, The School of Pharmaceutical Sciences, Jilin University, 1266 Fujin Road, Changchun, Jilin 130021, P. R. China
| | - Jinbao Xiang
- The Center for Combinatorial Chemistry and Drug Discovery of Jilin University, The School of Pharmaceutical Sciences, Jilin University, 1266 Fujin Road, Changchun, Jilin 130021, P. R. China
| | - Lianyou Zheng
- The Center for Combinatorial Chemistry and Drug Discovery of Jilin University, The School of Pharmaceutical Sciences, Jilin University, 1266 Fujin Road, Changchun, Jilin 130021, P. R. China
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21
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Zhang J, Liu YQ, Fang J. The biological activities of quinolizidine alkaloids. THE ALKALOIDS. CHEMISTRY AND BIOLOGY 2023; 89:1-37. [PMID: 36731966 DOI: 10.1016/bs.alkal.2022.06.001] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
Quinolizidine alkaloids isolated from various marine and terrestrial animals and plants are primarily composed of lupinine-, matrine-, and sparteine-type alkaloids. Matrine, phenanthroquinolizidines, bis-quinolizidines, and small molecules from amphibian skins are representative compounds of such alkaloids. Quinolizidine alkaloids harbor anticancer, antibacterial, antiinflammatory, antifibrosis, antiviral, and anti-arrhythmia. In this chapter, we comprehensively outline the biological activity and pharmacological action of quinolizidine alkaloids and discuss new avenues toward the discovery of novel and more efficient drugs based on these naturally occurring compounds. It is urgent for basic research and clinical practice to conduct more targeted comprehensive research based on the lead drugs of quinolizidine alkaloids with significant pharmacological activity.
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Affiliation(s)
- Junmin Zhang
- School of Pharmacy, State Key Laboratory of Applied Organic Chemistry, and College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou, China; State Key Laboratory of Quality Research in Chinese Medicine, Macau University of Science and Technology, Macau (SAR), China
| | - Ying-Qian Liu
- School of Pharmacy, State Key Laboratory of Applied Organic Chemistry, and College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou, China; State Key Laboratory of Grassland Agroecosystems, Lanzhou University, Lanzhou, China.
| | - Jianguo Fang
- School of Pharmacy, State Key Laboratory of Applied Organic Chemistry, and College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou, China.
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22
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A facile and robust approach for synthesis and structural characterization of an unprecedented ring system of 4H-pyrazolo[3,4-f]indolizine-4,9(2H)-dione derivatives. Tetrahedron 2023. [DOI: 10.1016/j.tet.2023.133303] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/11/2023]
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23
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Liu WD, Lee W, Shu H, Xiao C, Xu H, Chen X, Houk KN, Zhao J. Diastereoselective Radical Aminoacylation of Olefins through N-Heterocyclic Carbene Catalysis. J Am Chem Soc 2022; 144:22767-22777. [PMID: 36423331 DOI: 10.1021/jacs.2c11209] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
Abstract
There have been significant advancements in radical-mediated reactions through covalent-based organocatalysis. Here, we present the generation of iminyl and amidyl radicals via N-heterocyclic carbene (NHC) catalysis, enabling diastereoselective aminoacylation of trisubstituted alkenes. Different from photoredox catalysis, single electron transfer from the deprotonated Breslow intermediate to O-aryl hydroxylamine generates an NHC-bound ketyl radical, which undergoes diastereocontrolled cross-coupling with the prochiral C-centered radical. This operationally simple method provides a straightforward access to a variety of pyrroline and oxazolidinone heterocycles with vicinal stereocenters (77 examples, up to >19:1 d.r.). Electrochemical studies of the acyl thiazolium salts support our reaction design and highlight the reducing ability of Breslow-type derivatives. A detailed computational analysis of this organocatalytic system suggests that radical-radical coupling is the rate-determining step, in which π-π stacking interaction between the radical intermediates subtly controls the diastereoselectivity.
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Affiliation(s)
- Wen-Deng Liu
- Zhang Dayu School of Chemistry, Dalian University of Technology, Dalian116024, P. R. China
| | - Woojin Lee
- Department of Chemistry and Biochemistry, University of California, California, Los Angeles90095-1569, United States
| | - Hanyu Shu
- Zhang Dayu School of Chemistry, Dalian University of Technology, Dalian116024, P. R. China
| | - Chuyu Xiao
- Zhang Dayu School of Chemistry, Dalian University of Technology, Dalian116024, P. R. China
| | - Huiwei Xu
- Zhang Dayu School of Chemistry, Dalian University of Technology, Dalian116024, P. R. China
| | - Xiangyang Chen
- Department of Chemistry and Biochemistry, University of California, California, Los Angeles90095-1569, United States
| | - Kendall N Houk
- Department of Chemistry and Biochemistry, University of California, California, Los Angeles90095-1569, United States
| | - Jiannan Zhao
- Zhang Dayu School of Chemistry, Dalian University of Technology, Dalian116024, P. R. China
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24
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Moore AS, Stanley LM. Nickel-Catalyzed Formation of α-Substituted γ-Amino Ketones via Alkene Carboacylation. Org Lett 2022; 24:8959-8963. [DOI: 10.1021/acs.orglett.2c03413] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/04/2022]
Affiliation(s)
- Austin S. Moore
- Department of Chemistry, Iowa State University, Ames, Iowa 50011, United States
| | - Levi M. Stanley
- Department of Chemistry, Iowa State University, Ames, Iowa 50011, United States
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25
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Zhao P, Yu ZC, Wang LF, Zhou Y, Wu YD, Ma Y, Wu AX. I 2-Promoted In Situ Cyclization-Rethiolation Reaction: Synthesis of 2-Aliphatic- or Aromatic-Substituted Indolizines. J Org Chem 2022; 87:15197-15209. [PMID: 36305554 DOI: 10.1021/acs.joc.2c01724] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Abstract
An efficient I2-promoted one-pot one-step three-component reaction for the synthesis of sulfhydryl indolizines from methyl ketones, 2-pyridylacetate derivatives, and sulfonyl hydrazides via an in situ cyclization-rethiolation strategy has been developed. This protocol shows excellent substrate compatibility, including for chain and cyclic aliphatic methyl ketones, natural product pregnenolone acetate, and phosphorus-containing methyl ketones, affording a series of valuable aliphatic-substituted indolizines in good yields.
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Affiliation(s)
- Peng Zhao
- Institute of Advanced Studies and School of Pharmaceutical Sciences, Taizhou University, Jiaojiang, Taizhou 318000 Zhejiang, China.,Key Laboratory of Pesticide & Chemical Biology, Ministry of Education, College of Chemistry, Central China Normal University, Wuhan 430079, China
| | - Zhi-Cheng Yu
- Key Laboratory of Pesticide & Chemical Biology, Ministry of Education, College of Chemistry, Central China Normal University, Wuhan 430079, China
| | - Ling-Feng Wang
- Institute of Advanced Studies and School of Pharmaceutical Sciences, Taizhou University, Jiaojiang, Taizhou 318000 Zhejiang, China
| | - You Zhou
- Key Laboratory of Pesticide & Chemical Biology, Ministry of Education, College of Chemistry, Central China Normal University, Wuhan 430079, China
| | - Yan-Dong Wu
- Key Laboratory of Pesticide & Chemical Biology, Ministry of Education, College of Chemistry, Central China Normal University, Wuhan 430079, China
| | - Yongmin Ma
- Institute of Advanced Studies and School of Pharmaceutical Sciences, Taizhou University, Jiaojiang, Taizhou 318000 Zhejiang, China
| | - An-Xin Wu
- Key Laboratory of Pesticide & Chemical Biology, Ministry of Education, College of Chemistry, Central China Normal University, Wuhan 430079, China
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26
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Ye S, Ballin G, Pérez‐Victoria I, Braña AF, Martín J, Reyes F, Salas JA, Méndez C. Combinatorial biosynthesis yields novel hybrid argimycin P alkaloids with diverse scaffolds in Streptomyces argillaceus. Microb Biotechnol 2022; 15:2905-2916. [PMID: 36346129 PMCID: PMC9733639 DOI: 10.1111/1751-7915.14167] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/23/2022] [Revised: 10/06/2022] [Accepted: 10/19/2022] [Indexed: 11/10/2022] Open
Abstract
Coelimycin P1 and argimycins P are two types of polyketide alkaloids produced by Streptomyces coelicolor and Streptomyces argillaceus, respectively. Their biosynthesis pathways share some early steps that render very similar aminated polyketide chains, diverging the pathways afterwards. By expressing the putative isomerase cpkE and/or the putative epoxidase/dehydrogenase cpkD from the coelimycin P1 gene cluster into S. argillaceus wild type and in argimycin mutant strains, five novel hybrid argimycins were generated. Chemical characterization of those compounds revealed that four of them show unprecedented scaffolds (quinolizidine and pyranopyridine) never found before in the argimycin family of compounds. One of these compounds (argimycin DM104) shows improved antibiotic activity. Noticeable, biosynthesis of these quinolizidine argimycins results from a hybrid pathway created by combining enzymes from two different pathways, which utilizes an aminated polyketide chain as precursor instead of lysine as it occurs for other quinolizidines.
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Affiliation(s)
- Suhui Ye
- Departamento de Biología Funcional e Instituto Universitario de Oncología del Principado de Asturias (I.U.O.P.A)Universidad de OviedoOviedoSpain,Instituto de Investigación Sanitaria de Asturias (ISPA)OviedoSpain
| | - Giovanni Ballin
- Departamento de Biología Funcional e Instituto Universitario de Oncología del Principado de Asturias (I.U.O.P.A)Universidad de OviedoOviedoSpain
| | - Ignacio Pérez‐Victoria
- Fundación MEDINACentro de Excelencia en Investigación de Medicamentos Innovadores en AndalucíaArmilla, GranadaSpain
| | - Alfredo F. Braña
- Departamento de Biología Funcional e Instituto Universitario de Oncología del Principado de Asturias (I.U.O.P.A)Universidad de OviedoOviedoSpain
| | - Jesús Martín
- Fundación MEDINACentro de Excelencia en Investigación de Medicamentos Innovadores en AndalucíaArmilla, GranadaSpain
| | - Fernando Reyes
- Fundación MEDINACentro de Excelencia en Investigación de Medicamentos Innovadores en AndalucíaArmilla, GranadaSpain
| | - José A. Salas
- Departamento de Biología Funcional e Instituto Universitario de Oncología del Principado de Asturias (I.U.O.P.A)Universidad de OviedoOviedoSpain,Instituto de Investigación Sanitaria de Asturias (ISPA)OviedoSpain
| | - Carmen Méndez
- Departamento de Biología Funcional e Instituto Universitario de Oncología del Principado de Asturias (I.U.O.P.A)Universidad de OviedoOviedoSpain,Instituto de Investigación Sanitaria de Asturias (ISPA)OviedoSpain
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27
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Heckershoff R, May G, Däumer J, Eberle L, Krämer P, Rominger F, Rudolph M, Mulks FF, Hashmi ASK. Entropy-Induced Selectivity Switch in Gold Catalysis: Fast Access to Indolo[1,2-a]quinolines. Chemistry 2022; 28:e202201816. [PMID: 35699266 DOI: 10.1002/chem.202201816] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/13/2022] [Indexed: 01/07/2023]
Abstract
New N-heterocyclic compounds for organic functional materials and their efficient syntheses are highly demanded. A surprising entropy-induced selectivity switch in the gold-catalyzed intramolecular hydroarylation of 2-ethynyl N-aryl indoles was found and its exploitation led to straightforward syntheses of indolo[1,2-a]quinolines. Experimental and computational mechanistic investigations gave insight into this uncommon selectivity phenomenon and into the special reactivity of the indolo[1,2-a]quinolines. The high functional group tolerance of this methodology enabled access to a diverse scope with high yields. In addition, bidirectional approaches, post-functionalization reactions, and π-extension of the core structure were feasible. An in-depth study of the photophysical properties explored the structure-effect relationship for different derivatives and revealed a high potential of these compounds for future applications as functional materials.
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Affiliation(s)
- Robin Heckershoff
- Organisch-Chemisches Institut (OCI), Heidelberg University, Im Neuenheimer Feld 270, 69120, Heidelberg, Germany
| | - Garrett May
- Organisch-Chemisches Institut (OCI), Heidelberg University, Im Neuenheimer Feld 270, 69120, Heidelberg, Germany
| | - Janika Däumer
- Organisch-Chemisches Institut (OCI), Heidelberg University, Im Neuenheimer Feld 270, 69120, Heidelberg, Germany
| | - Lukas Eberle
- Organisch-Chemisches Institut (OCI), Heidelberg University, Im Neuenheimer Feld 270, 69120, Heidelberg, Germany
| | - Petra Krämer
- Organisch-Chemisches Institut (OCI), Heidelberg University, Im Neuenheimer Feld 270, 69120, Heidelberg, Germany
| | - Frank Rominger
- Organisch-Chemisches Institut (OCI), Heidelberg University, Im Neuenheimer Feld 270, 69120, Heidelberg, Germany
| | - Matthias Rudolph
- Organisch-Chemisches Institut (OCI), Heidelberg University, Im Neuenheimer Feld 270, 69120, Heidelberg, Germany
| | - Florian F Mulks
- Organisch-Chemisches Institut (OCI), Heidelberg University, Im Neuenheimer Feld 270, 69120, Heidelberg, Germany.,Center for Catalytic Hydrocarbon Functionalizations, Institute for Basic Science (IBS), Daejeon, 34141 (Republic of, Korea.,Department of Chemistry, Korea Advanced Institute of Science and Technology (KAIST), Daejeon, 34141 (Republic of, Korea.,Institute of Organic Chemistry, RWTH Aachen University, Landoltweg 1, 52074, Aachen, Germany
| | - A Stephen K Hashmi
- Organisch-Chemisches Institut (OCI), Heidelberg University, Im Neuenheimer Feld 270, 69120, Heidelberg, Germany.,Chemistry Department, Faculty of Science, King Abdulaziz University, Jeddah, 21589, Saudi Arabia
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28
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Hu F, Chu Y, Cao Z, Li Y, Hui XP. Enantioselective Synthesis of Functionalized Tetrahydropyridines through Iridium-Catalyzed Formal [5+1] Annulation. Org Lett 2022; 24:6945-6950. [PMID: 36129810 DOI: 10.1021/acs.orglett.2c02750] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
An efficient iridium-catalyzed asymmetric formal [5+1] annulation by in situ generation of enamines as N-nucleophiles for the synthesis of tetrahydropyridine derivatives is disclosed. The methodology offers direct access to a wide variety of chiral tetrahydropyridine derivatives in moderate to good yields and excellent enantioselectivity.
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Affiliation(s)
- Fang Hu
- State Key Laboratory of Applied Organic Chemistry, College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou 730000, P. R. China
| | - Yunpeng Chu
- State Key Laboratory of Applied Organic Chemistry, College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou 730000, P. R. China
| | - Zhengqiang Cao
- State Key Laboratory of Applied Organic Chemistry, College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou 730000, P. R. China
| | - Yucheng Li
- State Key Laboratory of Applied Organic Chemistry, College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou 730000, P. R. China
| | - Xin-Ping Hui
- State Key Laboratory of Applied Organic Chemistry, College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou 730000, P. R. China
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29
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Xi S, Jiang Y, Yang J, Yang J, Miao D, Chen B, Huang W, He L, Qiu H, Zhang M. Generation and [2,3]-Sigmatropic Rearrangement of Ammonium Ylides from Cyclopropyl Ketones for Chiral Indolizidines with Bridgehead Quaternary Stereocenters. Org Lett 2022; 24:6957-6961. [DOI: 10.1021/acs.orglett.2c02759] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Song Xi
- Chongqing Key Laboratory of Natural Product Synthesis and Drug Research, Innovative Drug Research Center, School of Pharmaceutical Sciences, Chongqing University, Chongqing 401331, China
| | - Yan Jiang
- Chongqing Key Laboratory of Natural Product Synthesis and Drug Research, Innovative Drug Research Center, School of Pharmaceutical Sciences, Chongqing University, Chongqing 401331, China
| | - Jiaojiao Yang
- Chongqing Key Laboratory of Natural Product Synthesis and Drug Research, Innovative Drug Research Center, School of Pharmaceutical Sciences, Chongqing University, Chongqing 401331, China
| | - Jiao Yang
- Chongqing Key Laboratory of Natural Product Synthesis and Drug Research, Innovative Drug Research Center, School of Pharmaceutical Sciences, Chongqing University, Chongqing 401331, China
| | - Dingyin Miao
- Chongqing Key Laboratory of Natural Product Synthesis and Drug Research, Innovative Drug Research Center, School of Pharmaceutical Sciences, Chongqing University, Chongqing 401331, China
| | - Baoyi Chen
- Chongqing Key Laboratory of Natural Product Synthesis and Drug Research, Innovative Drug Research Center, School of Pharmaceutical Sciences, Chongqing University, Chongqing 401331, China
| | - Wanqiu Huang
- Chongqing Key Laboratory of Natural Product Synthesis and Drug Research, Innovative Drug Research Center, School of Pharmaceutical Sciences, Chongqing University, Chongqing 401331, China
| | - Ling He
- Chongqing Key Laboratory of Natural Product Synthesis and Drug Research, Innovative Drug Research Center, School of Pharmaceutical Sciences, Chongqing University, Chongqing 401331, China
| | - Hanyue Qiu
- Chongqing Key Laboratory of Natural Product Synthesis and Drug Research, Innovative Drug Research Center, School of Pharmaceutical Sciences, Chongqing University, Chongqing 401331, China
| | - Min Zhang
- Chongqing Key Laboratory of Natural Product Synthesis and Drug Research, Innovative Drug Research Center, School of Pharmaceutical Sciences, Chongqing University, Chongqing 401331, China
- Key Laboratory of Prevention and Treatment of Cardiovascular and Cerebrovascular Diseases, Ministry of Education, Gannan Medical University, Ganzhou 341000, China
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30
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Mou Q, Zhao R, Sun B. Recent Advances in Transition-Metal-Catalyzed C-H Functionalization of Ferrocene Amides. Chem Asian J 2022; 17:e202200818. [PMID: 36047433 DOI: 10.1002/asia.202200818] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/05/2022] [Revised: 08/30/2022] [Indexed: 11/11/2022]
Abstract
During the past decades, in synthetic organic chemistry, directing-group-assisted C-H functionalization is found to be a key tool for the expedient and site-selective construction of C-C and hybrid bonds. Among C-H functionalization of ferrocene derivatives, the directed group strategy is undoubtedly the most commonly used method. Compared to the other directing groups, ferrocene amides can be synthesized easily and are now recognized as one of the most efficient devices for the selective functionalization of certain positions because its metal centre permits fine, tuneable and reversible coordination. The family of amide directing groups mainly comprises monodentate and bidentate directing groups, which are categorized on the basis of coordination sites. In this review, various C-H bond functionalization reactions of ferrocene using amide directing groups are broadly discussed.
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Affiliation(s)
- Qi Mou
- Qingdao University of Science and Technology, College of Chemical Engineering, CHINA
| | - Ruyuan Zhao
- Qingdao University of Science and Technology, College of Chemical Engineering, CHINA
| | - Bo Sun
- Qingdao University of Science and Technology, college of chemical engineering, zhengzhoulu No. 53, 266000, Qingdao, CHINA
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31
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Liang YQ, Xu YX, Cai ZJ, Ji SJ. Visible-light photocatalytic radical addition-translocation-cyclization to construct sulfonyl-containing azacycles. Chem Commun (Camb) 2022; 58:10206-10209. [PMID: 36000456 DOI: 10.1039/d2cc03799h] [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
Herein, a novel visible-light photocatalytic radical addition-translocation-cyclization (RATC) approach for the efficient synthesis of sulfonyl-containing azacycles is described. The reaction delivers a wide range of monocyclic, bicyclic and polycyclic azacycles by using easily prepared sodium sulfinates and N-homopropargylic amines as starting materials. Instead of the traditionally used toxic tin reagents and thermally hazardous azos in the RATC process, clean, renewable and sustainable visible light combined with a catalytic amount of photosensitizer is used in this process. Moreover, the successful transformation of some drug derivatives further highlights the potential application of this procedure.
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Affiliation(s)
- Yu-Qing Liang
- Key Laboratory of Organic Synthesis of Jiangsu Province, College of Chemistry, Chemical Engineering and Materials Science & Collaborative Innovation Center of Suzhou Nano Science and Technology, Soochow University, Suzhou, 215123, China.
| | - Yi-Xin Xu
- Key Laboratory of Organic Synthesis of Jiangsu Province, College of Chemistry, Chemical Engineering and Materials Science & Collaborative Innovation Center of Suzhou Nano Science and Technology, Soochow University, Suzhou, 215123, China.
| | - Zhong-Jian Cai
- Key Laboratory of Organic Synthesis of Jiangsu Province, College of Chemistry, Chemical Engineering and Materials Science & Collaborative Innovation Center of Suzhou Nano Science and Technology, Soochow University, Suzhou, 215123, China.
| | - Shun-Jun Ji
- Key Laboratory of Organic Synthesis of Jiangsu Province, College of Chemistry, Chemical Engineering and Materials Science & Collaborative Innovation Center of Suzhou Nano Science and Technology, Soochow University, Suzhou, 215123, China. .,Suzhou Baolidi Functional Materials Research Institute, Suzhou Xiangcheng, 215144, China
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32
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Fraňová P, Marchalín Š. Recent developments in the synthesis of polyhydroxylated indolizidines. European J Org Chem 2022. [DOI: 10.1002/ejoc.202200742] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Paula Fraňová
- Slovak University of Technology in Bratislava: Slovenska technicka univerzita v Bratislave Organic Chemistry Radlinského 2101/9 81237 Bratislava SLOVAKIA
| | - Štefan Marchalín
- Slovak University of Technology Faculty of Chemical and Food Technology: Slovenska Technicka Univerzita v Bratislave Fakulta chemickej a potravinarskej technologie Organic Chemistry Radlinského 2101/9 81237 Bratislava SLOVAKIA
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33
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Wang Q, Wang SL, Fan JB, Zeng GY, Zhou YJ, Deng X. Acid-promoted intra- and intermolecular [2+2] cycloaddition of indoles to aryl alkynes to access cyclobutene-fused indolines. Chem Commun (Camb) 2022; 58:9270-9273. [PMID: 35903993 DOI: 10.1039/d2cc02840a] [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
Herein, we have reported the first example of both intra- and intermolecular [2+2] cycloaddition of the electron-rich indoles and unactivated aryl alkynes promoted by the combination of Fe(NO3)3 and HNO3, which highlights efficient and selective access to several different types of functionalized cyclobutene-fused indolines from readily available starting materials with cheap catalysts and simple operations.
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Affiliation(s)
- Qing Wang
- Xiangya School of Pharmaceutical Science, Central South University, Changsha, Hunan, 410013, P. R. China
| | - Sen-Lin Wang
- Xiangya School of Pharmaceutical Science, Central South University, Changsha, Hunan, 410013, P. R. China
| | - Jin-Bao Fan
- Xiangya School of Pharmaceutical Science, Central South University, Changsha, Hunan, 410013, P. R. China
| | - Guang-Yao Zeng
- Xiangya School of Pharmaceutical Science, Central South University, Changsha, Hunan, 410013, P. R. China.,Hunan Key laboratory of Diagnostic and Therapeutic Drug Research for Chronic Diseases, Central South University, Changsha, Hunan, 410013, P. R. China.
| | - Ying-Jun Zhou
- Xiangya School of Pharmaceutical Science, Central South University, Changsha, Hunan, 410013, P. R. China.,Hunan Key laboratory of Diagnostic and Therapeutic Drug Research for Chronic Diseases, Central South University, Changsha, Hunan, 410013, P. R. China.
| | - Xu Deng
- Xiangya School of Pharmaceutical Science, Central South University, Changsha, Hunan, 410013, P. R. China.,Hunan Key laboratory of Diagnostic and Therapeutic Drug Research for Chronic Diseases, Central South University, Changsha, Hunan, 410013, P. R. China.
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34
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Raison B, Dussart N, Gueyrard D. Modified Julia olefination on pyrrolidinone: Application to the total synthesis of indolizidine 209D. European J Org Chem 2022. [DOI: 10.1002/ejoc.202200334] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Bastien Raison
- ICBMS Equipe CO2-Glyco: Institut de Chimie et Biochimie Moleculaires et Supramoleculaires Equipe de Chimie Organique 2-Glycochimie Chemistry 1 rue Victor Grignard 69622 Villeurbanne FRANCE
| | - Nicolas Dussart
- ICBMS Equipe CO2-Glyco: Institut de Chimie et Biochimie Moleculaires et Supramoleculaires Equipe de Chimie Organique 2-Glycochimie Chemistry 1 rue Victor Grignard 69622 Villeurbanne FRANCE
| | - David Gueyrard
- UCBL LCO2 43 bd du 11 novembre 1918 69622 Villeurbanne FRANCE
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35
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Mandrekar KS, Tilve SG. P 4O 10/TfOH mediated domino condensation-cyclization of amines with diacids: a route to indolizidine alkaloids under catalyst- and solvent-free conditions. RSC Adv 2022; 12:17701-17705. [PMID: 35765320 PMCID: PMC9200442 DOI: 10.1039/d2ra02534e] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/21/2022] [Accepted: 05/25/2022] [Indexed: 12/03/2022] Open
Abstract
A domino condensation–cyclization method is developed to synthesize indolizidine alkaloids using a P4O10/TfOH reagent system without the employment of either a catalyst or solvent. The use of a few aliphatic and aromatic dicarboxylic acids is shown along with various primary amines. This method is suitable for synthesizing pyrrolo[2,1-a]isoquinolines, pyrido[2,1-a]isoquinolines, and isoindolo[1,2-a]isoquinolinones in excellent yields. When phthalic acid is used, a workup with either NaBH4 or a saturated NaHCO3 solution provided 12b-H or 12b-OH isoindolo[1,2-a]isoquinolinones, respectively. A highly efficient and direct methodology for the construction of pyrrolo[2,1-a]isoquinoline, pyrido[2,1-a]isoquinoline, and 12b-H and 12b-OH isoindolo[2,1-a]isoquinolinone alkaloids from commercially available synthons is devised.![]()
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Affiliation(s)
- Ketan S Mandrekar
- School of Chemical Sciences, Goa University Taleigao Goa 403206 India
| | - Santosh G Tilve
- School of Chemical Sciences, Goa University Taleigao Goa 403206 India
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36
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Mishra DR, Panda BS, Nayak S, Panda J, Mohapatra S. Recent Advances in the Synthesis of 5‐Membered
N
‐Heterocycles via Rhodium Catalysed Cascade Reactions. ChemistrySelect 2022. [DOI: 10.1002/slct.202200531] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Affiliation(s)
- Deepak R. Mishra
- Organic Synthesis Laboratory Department of Chemistry Ravenshaw University Cuttack 753003 Odisha India
| | - Bhabani S. Panda
- Organic Synthesis Laboratory Department of Chemistry Ravenshaw University Cuttack 753003 Odisha India
| | - Sabita Nayak
- Organic Synthesis Laboratory Department of Chemistry Ravenshaw University Cuttack 753003 Odisha India
| | - Jasmine Panda
- Organic Synthesis Laboratory Department of Chemistry Ravenshaw University Cuttack 753003 Odisha India
| | - Seetaram Mohapatra
- Organic Synthesis Laboratory Department of Chemistry Ravenshaw University Cuttack 753003 Odisha India
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37
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Mahooti K, Mokhtary M, Kefayati H. One-Pot Synthesis and Antioxidant Properties of Highly Substituted Piperidine Derivatives Promoted by Choline Chloride/Urea. Polycycl Aromat Compd 2022. [DOI: 10.1080/10406638.2020.1787473] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Affiliation(s)
- Kamran Mahooti
- Department of Chemistry, Rasht Branch, Islamic Azad University, Rasht, Iran
| | - Masoud Mokhtary
- Department of Chemistry, Rasht Branch, Islamic Azad University, Rasht, Iran
| | - Hassan Kefayati
- Department of Chemistry, Rasht Branch, Islamic Azad University, Rasht, Iran
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38
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Mane KD, Rupanawar BD, Suryavanshi GM. Visible Light Promoted, Photocatalyst Free C(sp2)–H Bond Functionalization of Indolizines via EDA Complexes. European J Org Chem 2022. [DOI: 10.1002/ejoc.202200261] [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)
- Kishor D. Mane
- CSIR-National Chemical Laboratory: National Chemical Laboratory CSIR CEPD Pune INDIA
| | | | - Gurunath Mallappa Suryavanshi
- CSIR-National Chemical Laboratory: National Chemical Laboratory CSIR Chemical Engineering and Process Developement Dr. Homi Bhabha Road411008India 411008 Pune INDIA
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39
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Sun Z, Zhou L. Synthesis of 5-Fluoro-dihydroindolizines from Pyrrole-2-acetic Acids and Trifluoromethyl Alkenes via Dual C-F Bond Cleavage in a CF 3 Group. J Org Chem 2022; 87:4801-4812. [PMID: 35297252 DOI: 10.1021/acs.joc.2c00077] [Citation(s) in RCA: 12] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Herein, we describe the synthesis of 5-fluoro-dihydroindolizines via dual C-F bond cleavage in a trifluoromethyl group. The photocatalytic defluorinative coupling of pyrrole-2-acetic acids and α-trifluoromethyl alkenes cleaved the first C-F bond, providing gem-difluoroalkenes bearing an unprotected pyrrole motif. Subsequently, an intramolecular SNV reaction closed the ring by forming a C-N bond concomitantly with the cleavage of the second C-F bond. Using indole-2-acetic acids as the substrates, the reactions also allow the assembly of 6-fluoro-dihydropyrido[1,2-a]indoles.
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Affiliation(s)
- Zhengchang Sun
- School of Chemistry, Sun Yat-Sen University, Guangzhou 510006, China
| | - Lei Zhou
- School of Chemistry, Sun Yat-Sen University, Guangzhou 510006, China
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40
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Abstract
This review deals with the synthesis of naturally occurring alkaloids containing partially or completely saturated pyrimidine nuclei. The interest in these compounds is associated with their structural diversity, high biological activity and toxicity. The review is divided into four parts, each of which describes a number of synthetic methodologies toward structurally different naturally occurring alkaloids containing saturated cyclic six-membered amidine, guanidine, aminal and urea (thiourea) moieties, respectively. The development of various synthetic strategies for the preparation of these compounds has remarkably increased during the past few decades. This is primarily due to the fact that some of these compounds are isolated only in limited quantities, which makes it practically impossible to study their full structural characteristics and biological activity.
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41
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Malviya BK, Jassal AK, Karnatak M, Verma VP, Sharma S. Electro-Oxidative sp 3 C-H Bond Functionalization and Annulation Cascade: Synthesis of Novel Heterocyclic Substituted Indolizines. J Org Chem 2022; 87:2898-2911. [PMID: 35104140 DOI: 10.1021/acs.joc.1c02773] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
Indolizine derivatives are prevalent in many synthetic intermediates, pharmaceuticals, and organic materials. Herein, we report a novel electro-oxidative cascade cyclization reaction that uses electricity as the primary energy input to promote the reaction, leading to a series of heterocyclic substituted indolizine derivatives under exogenous-oxidant-free conditions. It is noteworthy that this electrochemical method provides a novel strategy for generating heterocyclic diversity of quinazolinones and quinolines on indolizines. In addition, the sole byproduct in the reaction was molecular hydrogen.
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Affiliation(s)
- Bhanwar Kumar Malviya
- Department of Chemistry, Mohanlal Sukhadia University, Udaipur, Rajasthan 313001, India
| | - Amanpreet Kaur Jassal
- Department of Chemistry, Indian Institute of Technology, Delhi, New Delhi 110016, India
| | - Manvika Karnatak
- Department of Chemistry, Banasthali University, Newai-Jodhpuriya Road, Vanasthali, Rajasthan 304022, India
| | - Ved Prakash Verma
- Department of Chemistry, Banasthali University, Newai-Jodhpuriya Road, Vanasthali, Rajasthan 304022, India
| | - Siddharth Sharma
- Department of Chemistry, Mohanlal Sukhadia University, Udaipur, Rajasthan 313001, India
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42
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Brønsted acid-enhanced copper-catalyzed atroposelective cycloisomerization to axially chiral arylquinolizones via dearomatization of pyridine. Nat Commun 2022; 13:373. [PMID: 35042873 PMCID: PMC8766466 DOI: 10.1038/s41467-022-27989-3] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/21/2021] [Accepted: 12/10/2021] [Indexed: 01/17/2023] Open
Abstract
The construction of axially chiral N-heterobiaryls is of great interest as a result of their occurrence in organocatalysts, chiral ligands, natural products, and biologically active molecules. Despite remarkable achievements in this area, strategies for the preparation of new classes of axially chiral N-heterobiaryls remain to be further explored. Herein, we report the enantioselective synthesis of axially chiral arylquinolizones through an intramolecular atroposelective cycloisomerization. The reaction proceeds via the Brønsted acid-enhanced dearomatization of pyridine by a copper catalyst that allows for the formation of the desired products in excellent yields and enantioselectivities. The utility of this methodology is illustrated by a synthesis on gram scale production and transformation of the products into chiral thiourea catalysts. Mechanistic studies demonstrate that Brønsted acid plays a significant role in promoting the reactivity of the reaction, while both the steric and electronic effects of aryl substituents in substrate play a role in controlling the stereoselectivity.
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43
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Luo J, Liu Y, Wang H, Gong C, Zhou Z, Zhou Q. Chiral 1,2-Diaminocyclohexane-α-Amino Acid-Derived Amidphos/Ag(I)-Catalyzed Divergent Enantioselective 1,3-Dipolar Cycloaddition of Azomethine Ylides. HETEROCYCLES 2022. [DOI: 10.3987/com-21-14561] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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44
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Seth K. Recent progress in rare-earth metal-catalyzed sp 2 and sp 3 C–H functionalization to construct C–C and C–heteroelement bonds. Org Chem Front 2022. [DOI: 10.1039/d1qo01859k] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Abstract
The review presents rare-earth metal-catalyzed C(sp2/sp3)–H functionalization accessing C–C/C–heteroatom bonds and olefin (co)polymerization, highlighting substrate scope, mechanistic realization, and origin of site-, enantio-/diastereo-selectivity.
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Affiliation(s)
- Kapileswar Seth
- Department of Medicinal Chemistry, National Institute of Pharmaceutical Education and Research (NIPER) – Guwahati, Sila Katamur, Changsari, Kamrup 781101, Assam, India
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45
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Xu X, Bao L, Ran L, Yang Z, Yan D, Wang CJ, Teng H. Synthesis of bioactive fluoropyrrolidines via copper(i)-catalysed asymmetric 1,3-dipolar cycloaddition of azomethine ylides. Chem Sci 2022; 13:1398-1407. [PMID: 35222924 PMCID: PMC8809416 DOI: 10.1039/d1sc04595d] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/19/2021] [Accepted: 12/06/2021] [Indexed: 12/18/2022] Open
Abstract
Chiral pyrrolidinyl units are important building blocks in biologically active natural products and drugs, and the development of efficient methods for the synthesis of diverse structured pyrrolidine derivatives is of great importance. Meanwhile, incorporating fluorine containing groups into small molecules often changes their activities to a great extent due to the special physicochemical properties of fluorine atoms. Herein, we report an efficient route to obtain enantioenriched 3,3-difluoro- and 3,3,4-trifluoropyrrolidinyl derivatives by Cu(i)-catalysed enantioselective 1,3-dipolar cycloaddition of azomethine ylides with less active 1,1-difluoro- and 1,1,2-trifluorostyrenes. A series of new fluorinated pyrrolidines have been prepared in high yields (up to 96%) and with excellent stereoselectivities (up to >20 : 1 dr and 97% ee), and these unique structural blocks could be readily introduced into some natural compounds and pharmaceuticals. Additionally, antifungal activity investigation against four common plant fungi showed that some products possess general and high biological activities; comparison with the low antifungal activities of corresponding nonfluorinated compounds revealed that the fluorine atoms at the pyrrolidinyl rings play a crucial role in the antifungal activity. Chiral fluoropyrrolidines were synthesized by Cu(i)-catalyzed enantioselective 1,3-dipolar cycloaddition of azomethine ylides with less active fluorinated styrenes, with broad substrate scope and high yield, stereoselectivity and biological activity.![]()
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Affiliation(s)
- Xiao Xu
- College of Science, Huazhong Agricultural University, Wuhan, 430070, P. R. China
| | - Longzhu Bao
- College of Science, Huazhong Agricultural University, Wuhan, 430070, P. R. China
| | - Lu Ran
- College of Science, Huazhong Agricultural University, Wuhan, 430070, P. R. China
| | - Zhenyan Yang
- College of Science, Huazhong Agricultural University, Wuhan, 430070, P. R. China
| | - Dingce Yan
- Analytical and Testing Center, Huazhong University of Science and Technology, Wuhan, 430074, P. R. China
| | - Chun-Jiang Wang
- College of Chemistry and Molecular Sciences, Wuhan University, Wuhan, 430072, P. R. China
| | - Huailong Teng
- College of Science, Huazhong Agricultural University, Wuhan, 430070, P. R. China
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De Rop AS, Rombaut J, Willems T, De Graeve M, Vanhaecke L, Hulpiau P, De Maeseneire SL, De Mol ML, Soetaert WK. Novel Alkaloids from Marine Actinobacteria: Discovery and Characterization. Mar Drugs 2021; 20:md20010006. [PMID: 35049861 PMCID: PMC8777666 DOI: 10.3390/md20010006] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2021] [Revised: 12/14/2021] [Accepted: 12/18/2021] [Indexed: 01/03/2023] Open
Abstract
The marine environment is an excellent resource for natural products with therapeutic potential. Its microbial inhabitants, often associated with other marine organisms, are specialized in the synthesis of bioactive secondary metabolites. Similar to their terrestrial counterparts, marine Actinobacteria are a prevalent source of these natural products. Here, we discuss 77 newly discovered alkaloids produced by such marine Actinobacteria between 2017 and mid-2021, as well as the strategies employed in their elucidation. While 12 different classes of alkaloids were unraveled, indoles, diketopiperazines, glutarimides, indolizidines, and pyrroles were most dominant. Discoveries were mainly based on experimental approaches where microbial extracts were analyzed in relation to novel compounds. Although such experimental procedures have proven useful in the past, the methodologies need adaptations to limit the chance of compound rediscovery. On the other hand, genome mining provides a different angle for natural product discovery. While the technology is still relatively young compared to experimental screening, significant improvement has been made in recent years. Together with synthetic biology tools, both genome mining and extract screening provide excellent opportunities for continued drug discovery from marine Actinobacteria.
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Affiliation(s)
- Anne-Sofie De Rop
- Centre for Industrial Biotechnology and Biocatalysis (InBio.be), Department of Biotechnology, Faculty of Bioscience Engineering, Ghent University, Coupure Links 653, 9000 Ghent, Belgium; (A.-S.D.R.); (J.R.); (T.W.); (M.L.D.M.); (W.K.S.)
| | - Jeltien Rombaut
- Centre for Industrial Biotechnology and Biocatalysis (InBio.be), Department of Biotechnology, Faculty of Bioscience Engineering, Ghent University, Coupure Links 653, 9000 Ghent, Belgium; (A.-S.D.R.); (J.R.); (T.W.); (M.L.D.M.); (W.K.S.)
| | - Thomas Willems
- Centre for Industrial Biotechnology and Biocatalysis (InBio.be), Department of Biotechnology, Faculty of Bioscience Engineering, Ghent University, Coupure Links 653, 9000 Ghent, Belgium; (A.-S.D.R.); (J.R.); (T.W.); (M.L.D.M.); (W.K.S.)
| | - Marilyn De Graeve
- Laboratory of Chemical Analysis (LCA), Department of Translational Physiology, Infectiology and Public Health, Faculty of Veterinary Medicine, Ghent University, Salisburylaan 133, 9820 Merelbeke, Belgium; (M.D.G.); (L.V.)
| | - Lynn Vanhaecke
- Laboratory of Chemical Analysis (LCA), Department of Translational Physiology, Infectiology and Public Health, Faculty of Veterinary Medicine, Ghent University, Salisburylaan 133, 9820 Merelbeke, Belgium; (M.D.G.); (L.V.)
| | - Paco Hulpiau
- BioInformatics Knowledge Center (BiKC), Campus Station Brugge, Howest University of Applied Sciences, Rijselstraat 5, 8200 Bruges, Belgium;
| | - Sofie L. De Maeseneire
- Centre for Industrial Biotechnology and Biocatalysis (InBio.be), Department of Biotechnology, Faculty of Bioscience Engineering, Ghent University, Coupure Links 653, 9000 Ghent, Belgium; (A.-S.D.R.); (J.R.); (T.W.); (M.L.D.M.); (W.K.S.)
- Correspondence:
| | - Maarten L. De Mol
- Centre for Industrial Biotechnology and Biocatalysis (InBio.be), Department of Biotechnology, Faculty of Bioscience Engineering, Ghent University, Coupure Links 653, 9000 Ghent, Belgium; (A.-S.D.R.); (J.R.); (T.W.); (M.L.D.M.); (W.K.S.)
| | - Wim K. Soetaert
- Centre for Industrial Biotechnology and Biocatalysis (InBio.be), Department of Biotechnology, Faculty of Bioscience Engineering, Ghent University, Coupure Links 653, 9000 Ghent, Belgium; (A.-S.D.R.); (J.R.); (T.W.); (M.L.D.M.); (W.K.S.)
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47
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Olivier WJ, Smith JA, Bissember AC. Synthesis of Pyrrolidine- and γ-Lactam-Containing Natural Products and Related Compounds from Pyrrole Scaffolds. CHEM REC 2021; 22:e202100277. [PMID: 34862727 DOI: 10.1002/tcr.202100277] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/22/2021] [Revised: 11/18/2021] [Indexed: 11/11/2022]
Abstract
Polycyclic alkaloid natural products featuring pyrrolidine and pyrrolidinone motifs remain enduring targets of total synthesis endeavors. Pyrrole and its derivatives have been exploited to access many such frameworks, including alkaloids belonging to the Aspidosperma, Stemona, and batzelladine families. In this article, a selection of exemplars that highlight the utility of pyrrole-based approaches to facilitate total syntheses of pyrrolidine- and pyrrolidinone-containing alkaloids and related molecules are showcased.
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Affiliation(s)
- Wesley J Olivier
- School of Natural Sciences-Chemistry, University of Tasmania Hobart, Tasmania, Australia
| | - Jason A Smith
- School of Natural Sciences-Chemistry, University of Tasmania Hobart, Tasmania, Australia
| | - Alex C Bissember
- School of Natural Sciences-Chemistry, University of Tasmania Hobart, Tasmania, Australia
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48
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Ma S, Mandalapu D, Wang S, Zhang Q. Biosynthesis of cyclopropane in natural products. Nat Prod Rep 2021; 39:926-945. [PMID: 34860231 DOI: 10.1039/d1np00065a] [Citation(s) in RCA: 25] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
Covering: 2012 to 2021Cyclopropane attracts wide interests in the fields of synthetic and pharmaceutical chemistry, and chemical biology because of its unique structural and chemical properties. This structural motif is widespread in natural products, and is usually essential for biological activities. Nature has evolved diverse strategies to access this structural motif, and increasing knowledge of the enzymes forming cyclopropane (i.e., cyclopropanases) has been revealed over the last two decades. Here, the scientific literature from the last two decades relating to cyclopropane biosynthesis is summarized, and the enzymatic cyclopropanations, according to reaction mechanism, which can be grouped into two major pathways according to whether the reaction involves an exogenous C1 unit from S-adenosylmethionine (SAM) or not, is discussed. The reactions can further be classified based on the key intermediates required prior to cyclopropane formation, which can be carbocations, carbanions, or carbon radicals. Besides the general biosynthetic pathways of the cyclopropane-containing natural products, particular emphasis is placed on the mechanism and engineering of the enzymes required for forming this unique structure motif.
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Affiliation(s)
- Suze Ma
- Department of Chemistry, Fudan University, Shanghai, 200433, China.
| | | | - Shu Wang
- Department of Chemistry, Fudan University, Shanghai, 200433, China.
| | - Qi Zhang
- Department of Chemistry, Fudan University, Shanghai, 200433, China.
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49
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Cu-catalyzed endo-selective asymmetric 1,3-dipolar cycloaddition of azomethine ylides with ethenesulfonyl fluorides: Efficient access to chiral pyrrolidine-3-sulfonyl fluorides. CHINESE CHEM LETT 2021. [DOI: 10.1016/j.cclet.2021.05.063] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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50
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Suzuki Y, Kanemoto K, Inoue A, Imae K, Fukuzawa SI. Silver/ThioClickFerrophos-Catalyzed 1,3-Dipolar Cycloaddition and Tandem Addition-Elimination Reaction of Morita-Baylis-Hillman Adducts. J Org Chem 2021; 86:14586-14596. [PMID: 34661412 DOI: 10.1021/acs.joc.1c01440] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
Abstract
The asymmetric 1,3-dipolar cycloaddition of glycine imino esters to Morita-Baylis-Hillman (MBH) adducts or acetylated MBH adducts is described. The reaction was efficiently catalyzed by AgOAc/(R,Sp)-ThioClickFerrophos at room temperature to afford pyrrolidine derivatives bearing a quaternary carbon as a single diastereomer with excellent enantioselectivity. When a cyclic pyrroline ester was used as the nucleophile instead of a glycine imino ester, the enantioselective tandem addition-elimination reaction with an acetylated MBH adduct proceeded with an excellent yield and enantioselectivity, resulting in the formation of an exo-olefin. The wide substrate scope of these reactions and the transformability of the products enable expeditious access to divergent multifunctionalized pyrrolidines in an optically pure fashion.
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Affiliation(s)
- Yuko Suzuki
- Department of Applied Chemistry, Institute of Science and Engineering, Chuo University, 1-13-27 Kasuga, Bunkyo-ku, Tokyo 112-8551, Japan
| | - Kazuya Kanemoto
- Department of Applied Chemistry, Institute of Science and Engineering, Chuo University, 1-13-27 Kasuga, Bunkyo-ku, Tokyo 112-8551, Japan
| | - Ayana Inoue
- Department of Applied Chemistry, Institute of Science and Engineering, Chuo University, 1-13-27 Kasuga, Bunkyo-ku, Tokyo 112-8551, Japan
| | - Kazumi Imae
- Department of Applied Chemistry, Institute of Science and Engineering, Chuo University, 1-13-27 Kasuga, Bunkyo-ku, Tokyo 112-8551, Japan
| | - Shin-Ichi Fukuzawa
- Department of Applied Chemistry, Institute of Science and Engineering, Chuo University, 1-13-27 Kasuga, Bunkyo-ku, Tokyo 112-8551, Japan
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