1
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Ding Y, Wu J, Zhang T, Liu H, Huang H. Site-Selective Carbonylative Cyclization with Two Allylic C-H Bonds Enabled by Radical Differentiation. J Am Chem Soc 2024; 146:19635-19642. [PMID: 38980114 DOI: 10.1021/jacs.4c05360] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 07/10/2024]
Abstract
Controlling the site-selectivity of C-H functionalization is of significant importance and a formidable undertaking in synthetic organic chemistry, motivating the continuing development of efficient and sustainable technologies for activating C-H bonds. However, methods that control the site-selectivity for double C-H functionalization are rare. We herein report a conceptually new method to achieve highly site-selective C-H functionalization by implementing a radical single-out strategy. Leveraging the steric hindrance-sensitive CO-insertion as the radical differentiation process, a site-selective and stereoselective carbonylative formal [2 + 2] cycloaddition of imines and alkenes by sequential double allylic C-H bond activation was established without special and complicated HAT-reagents. This reaction was compatible with a wide range of alkenes and imines with diverse skeletons to deliver allylic β-lactams that are of synthetic and medicinal interest.
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Affiliation(s)
- Yongzheng Ding
- Hefei National Research Center for Physical Sciences at the Microscale, University of Science and Technology of China, Hefei, 230026, P. R. China
| | - Jianing Wu
- Key Laboratory of Precision and Intelligent Chemistry and Department of Chemistry, University of Science and Technology of China, Hefei, 230026, P. R. China
| | - Tianze Zhang
- Hefei National Research Center for Physical Sciences at the Microscale, University of Science and Technology of China, Hefei, 230026, P. R. China
| | - Hongchi Liu
- Key Laboratory of Precision and Intelligent Chemistry and Department of Chemistry, University of Science and Technology of China, Hefei, 230026, P. R. China
| | - Hanmin Huang
- Key Laboratory of Precision and Intelligent Chemistry and Department of Chemistry, University of Science and Technology of China, Hefei, 230026, P. R. China
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2
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Tordato É, Gonçalves RO, Baldassari LL, Jiménez CA, Lüdtke DS, Paixão MW. Expanding the Chemical Space of Electrophilic β-Glycosyl β-Lactams through Photoinduced Diastereoselective Functionalization. Org Lett 2024; 26:5500-5505. [PMID: 38900999 PMCID: PMC11232025 DOI: 10.1021/acs.orglett.4c01844] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/20/2024] [Revised: 06/14/2024] [Accepted: 06/18/2024] [Indexed: 06/22/2024]
Abstract
Herein, we present a photoinduced diastereoselective C-3 functionalization of electrophilic β-glycosyl β-lactams. The developed protocol is simple, mild, and scalable and explores the use of 3-exomethylene β-lactams as reaction partners in a Giese type reaction. The key nucleophilic alkyl radical is generated by a photoinduced electron transfer process in the EDA complex formed by NHPI and Hantzsch esters. The diastereoselective hydrogen atom transfer to the β-lactam radical intermediate enables the synthesis of various N-phenyl β-glycosyl β-lactams.
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Affiliation(s)
- Éverton
A. Tordato
- Laboratory
for Sustainable Organic Synthesis and Catalysis - Chemistry Department
− Federal University of São Carlos − UFSCar,
São Carlos, São Paulo 13565-905, Brazil
| | - Renan O. Gonçalves
- Laboratory
for Sustainable Organic Synthesis and Catalysis - Chemistry Department
− Federal University of São Carlos − UFSCar,
São Carlos, São Paulo 13565-905, Brazil
| | - Lucas L. Baldassari
- Laboratory
for Sustainable Organic Synthesis and Catalysis - Chemistry Department
− Federal University of São Carlos − UFSCar,
São Carlos, São Paulo 13565-905, Brazil
- Institute
of Chemistry, Federal University of Rio
Grande do Sul - UFRGS, Porto
Alegre, Rio Grande do Sul 91501-970, Brazil
| | - Claudio A. Jiménez
- Department
of Organic Chemistry, Faculty of Chemical
Sciences, Universidad de Concepción, Concepción 4130000, Chile
| | - Diogo S. Lüdtke
- Institute
of Chemistry, Federal University of Rio
Grande do Sul - UFRGS, Porto
Alegre, Rio Grande do Sul 91501-970, Brazil
| | - Márcio W. Paixão
- Laboratory
for Sustainable Organic Synthesis and Catalysis - Chemistry Department
− Federal University of São Carlos − UFSCar,
São Carlos, São Paulo 13565-905, Brazil
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3
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Wearing ER, Yeh YC, Terrones GG, Parikh SG, Kevlishvili I, Kulik HJ, Schindler CS. Visible light-mediated aza Paternò-Büchi reaction of acyclic oximes and alkenes to azetidines. Science 2024; 384:1468-1476. [PMID: 38935726 DOI: 10.1126/science.adj6771] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/10/2023] [Accepted: 05/15/2024] [Indexed: 06/29/2024]
Abstract
The aza Paternò-Büchi reaction is a [2+2]-cycloaddition reaction between imines and alkenes that produces azetidines, four-membered nitrogen-containing heterocycles. Currently, successful examples rely primarily on either intramolecular variants or cyclic imine equivalents. To unlock the full synthetic potential of aza Paternò-Büchi reactions, it is essential to extend the reaction to acyclic imine equivalents. Here, we report that matching of the frontier molecular orbital energies of alkenes with those of acyclic oximes enables visible light-mediated aza Paternò-Büchi reactions through triplet energy transfer catalysis. The utility of this reaction is further showcased in the synthesis of epi-penaresidin B. Density functional theory computations reveal that a competition between the desired [2+2]-cycloaddition and alkene dimerization determines the success of the reaction. Frontier orbital energy matching between the reactive components lowers transition-state energy (ΔGǂ) values and ultimately promotes reactivity.
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Affiliation(s)
- Emily R Wearing
- Department of Chemistry, University of Michigan, Ann Arbor, MI 48109, USA
| | - Yu-Cheng Yeh
- Department of Chemistry, University of Michigan, Ann Arbor, MI 48109, USA
| | - Gianmarco G Terrones
- Department of Chemical Engineering, Massachusetts Institute of Technology, Cambridge, MA 02139, USA
| | - Seren G Parikh
- Department of Chemistry, University of Michigan, Ann Arbor, MI 48109, USA
| | - Ilia Kevlishvili
- Department of Chemical Engineering, Massachusetts Institute of Technology, Cambridge, MA 02139, USA
| | - Heather J Kulik
- Department of Chemical Engineering, Massachusetts Institute of Technology, Cambridge, MA 02139, USA
- Department of Chemistry, Massachusetts Institute of Technology, Cambridge, MA 02139, USA
| | - Corinna S Schindler
- Department of Chemistry, University of Michigan, Ann Arbor, MI 48109, USA
- Department of Chemistry, University of British Columbia, Vancouver V6T 1Z1 BC, Canada
- Department of Biochemistry and Molecular Biology, University of British Columbia, Vancouver V6T 1Z4 BC, Canada
- BC Cancer, Vancouver V5Z 1G1 BC, Canada
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4
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Kumar S, Arora A, Singh SK, Kumar R, Shankar B, Singh BK. Phenyliodine bis(trifluoroacetate) as a sustainable reagent: exploring its significance in organic synthesis. Org Biomol Chem 2024; 22:3109-3185. [PMID: 38529599 DOI: 10.1039/d3ob01964k] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/27/2024]
Abstract
Iodine-containing molecules, especially hypervalent iodine compounds, have gained significant attention in organic synthesis. They are valuable and sustainable reagents, leading to a remarkable surge in their use for chemical transformations. One such hypervalent iodine compound, phenyliodine bis(trifluoroacetate)/bis(trifluoroacetoxy)iodobenzene, commonly referred to as PIFA, has emerged as a prominent candidate due to its attributes of facile manipulation, moderate reactivity, low toxicity, and ready availability. PIFA presents an auspicious prospect as a substitute for costly organometallic catalysts and environmentally hazardous oxidants containing heavy metals. PIFA exhibits remarkable catalytic activity, facilitating an array of consequential organic reactions, including sulfenylation, alkylarylation, oxidative coupling, cascade reactions, amination, amidation, ring-rearrangement, carboxylation, and numerous others. Over the past decade, the application of PIFA in synthetic chemistry has witnessed substantial growth, necessitating an updated exploration of this field. In this discourse, we present a concise overview of PIFA's applications as a 'green' reagent in the domain of synthetic organic chemistry. A primary objective of this article is to bring to the forefront the scientific community's awareness of the merits associated with adopting PIFA as an environmentally conscientious alternative to heavy metals.
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Affiliation(s)
- Sumit Kumar
- Bioorganic Laboratory, Department of Chemistry, University of Delhi, Delhi-110007, India.
| | - Aditi Arora
- Bioorganic Laboratory, Department of Chemistry, University of Delhi, Delhi-110007, India.
| | - Sunil K Singh
- Department of Chemistry, Kirori Mal College, University of Delhi, Delhi-110007, India.
| | - Rajesh Kumar
- Department of Chemistry, R.D.S College, B.R.A. Bihar University, Muzaffarpur-842002, India
| | - Bhawani Shankar
- Department of Chemistry, Deshbandhu College, University of Delhi, Delhi-110019, India
| | - Brajendra K Singh
- Bioorganic Laboratory, Department of Chemistry, University of Delhi, Delhi-110007, India.
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5
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Jurin M, Stepanić V, Bojanić K, Vadlja D, Kontrec D, Dražić T, Roje M. Novel (±)- trans- β-lactam ureas: Synthesis, in silico and in vitro biological profiling. ACTA PHARMACEUTICA (ZAGREB, CROATIA) 2024; 74:37-59. [PMID: 38554382 DOI: 10.2478/acph-2024-0008] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Accepted: 01/13/2024] [Indexed: 04/01/2024]
Abstract
A diastereomeric mixture of racemic 3-phthalimido-b-lactam 2a/2b was synthesized by the Staudinger reaction of carboxylic acid activated with 2-chloro-1-methylpyridinium iodide and imine 1. The amino group at the C3 position of the b-lactam ring was used for further structural upgrade. trans-b-lactam ureas 4a-t were prepared by the condensation reaction of the amino group of b-lactam ring with various aromatic and aliphatic isocyanates. Antimicrobial activity of compounds 4a-t was evaluated in vitro and neither antibacterial nor antifungal activity were observed. Several of the newly synthesized trans-b-lactam ureas 4a-c, 4f, 4h, 4n, 4o, 4p, and 4s were evaluated for in vitro antiproliferative activity against liver hepatocellular carcinoma (HepG2), ovarian carcinoma (A2780), breast adenocarcinoma (MCF7) and untransformed human fibroblasts (HFF1). The b-lactam urea 4o showed the most potent antiproliferative activity against the ovarian carcinoma (A2780) cell line. Compounds 4o and 4p exhibited strong cytotoxic effects against human non-tumor cell line HFF1. The b-lactam ureas 4a-t were estimated to be soluble and membrane permeable, moderately lipophilic molecules (logP 4.6) with a predisposition to be CYP3A4 and P-glycoprotein substrates. The tools PASS and SwissTargetPrediction could not predict biological targets for compounds 4a-t with high probability, pointing to the novelty of their structure. Considering low toxicity risk, molecules 4a and 4f can be selected as the most promising candidates for further structure modifications.
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Affiliation(s)
- Mladenka Jurin
- Division of Organic Chemistry and Biochemistry, Laboratory for Chiral Technologies, Ruđer Bošković Institute 10000 Zagreb, Croatia
| | - Višnja Stepanić
- Division of Electronics, Laboratory for Machine Learning and Knowledge Representation, Ruđer Bošković Institute, 10000, Zagreb Croatia
| | - Krunoslav Bojanić
- Division of Materials Chemistry Laboratory for Aquaculture in Biotechnology, Ruđer Bošković Institute 10000 Zagreb, Croatia
| | - Denis Vadlja
- Division of Materials Chemistry Laboratory for Aquaculture in Biotechnology, Ruđer Bošković Institute 10000 Zagreb, Croatia
| | - Darko Kontrec
- Division of Organic Chemistry and Biochemistry, Laboratory for Chiral Technologies, Ruđer Bošković Institute 10000 Zagreb, Croatia
| | - Tonko Dražić
- Division of Physical Chemistry Laboratory for Biocolloids and Surface Chemistry, Ruđer Bošković Institute 10000 Zagreb
| | - Marin Roje
- Division of Organic Chemistry and Biochemistry, Laboratory for Chiral Technologies, Ruđer Bošković Institute 10000 Zagreb, Croatia
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6
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Skibinska M, Warowicka A, Koroniak H, Cytlak T, Crousse B. Synthesis, Reactivity, and Antibacterial Activity of gem-Difluoroalkene, Difluoromethyl, and Trifluoromethyl β-Lactams. Org Lett 2024; 26:692-696. [PMID: 38227548 PMCID: PMC10825868 DOI: 10.1021/acs.orglett.3c04094] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/05/2023] [Revised: 01/05/2024] [Accepted: 01/11/2024] [Indexed: 01/17/2024]
Abstract
New gem-difluoroalkenes were synthesized by the dehydrofluorination of the corresponding 4-CF3-β-lactams. An unexpected rearrangement mechanism of the ester moiety dependent on a stabilizing negative charge was observed. Hydrogenation to 4-CHF2-β-lactams was successful from gem-difluoro-β-lactams.
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Affiliation(s)
- Monika Skibinska
- Faculty
of Chemistry, Adam Mickiewicz University, Uniwersytetu Poznańskiego
8, 61-614 Poznań, Poland
| | - Alicja Warowicka
- Faculty
of Biology, Adam Mickiewicz University, Uniwersytetu Poznańskiego
6, 61-614 Poznań, Poland
| | - Henryk Koroniak
- Faculty
of Chemistry, Adam Mickiewicz University, Uniwersytetu Poznańskiego
8, 61-614 Poznań, Poland
| | - Tomasz Cytlak
- Faculty
of Chemistry, Adam Mickiewicz University, Uniwersytetu Poznańskiego
8, 61-614 Poznań, Poland
- Centre
for Advanced Technologies, Adam Mickiewicz
University, Uniwersytetu
Poznańskiego 10, 61-614 Poznań, Poland
| | - Benoît Crousse
- BioCIS
UMR 8076 CNRS, Building Henri Moissan, Université
Paris-Saclay, 17 avenue
des sciences, 91400 Orsay, France
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7
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Pahlavan F, Moosavi SS, Zolghadr AR, Iranpoor N. Electronic origins of the stereochemistry in β-lactam formed through the Staudinger reaction catalyzed by a nucleophile. RSC Adv 2023; 13:33654-33667. [PMID: 38020014 PMCID: PMC10653035 DOI: 10.1039/d3ra05286a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/04/2023] [Accepted: 10/31/2023] [Indexed: 12/01/2023] Open
Abstract
This paper evaluates the electronic effects of molecular substituents on the stereoselectivity of the umpolung Staudinger catalytic reaction. This is especially important because experimental studies on constructing the β-lactam ring, a core structure of most antibiotics, through catalyzed Staudinger reactions have been massively progressing over the last century. Yet, there is a necessity for an in-depth understanding of the reaction mechanisms to help chemists, working on the well-established discoveries, improve these to optimize the stereoselectivity and yield of synthetic methods. Access to practical and effective advancements in forming optically pure β-lactam is paramount in the field of medical chemistry. This paper specifically investigates how changing the N-protecting group in the imine fragment can switch the stereoselectivity of the PPY-catalyzed Staudinger reaction. To do so, we employed the density functional theory (DFT) for geometry optimization and electronic analysis at the B3LYP/6-31G(d) level of theory to examine and compare the role of N-tosyl (N-Ts) and N-triflyl (N-Tf) imine on the mechanism pathways, i.e., imine-first or ketene-first, and stereochemistry of the reaction, i.e., cis or trans β-lactam. Our results show that the reaction mechanism pathway cannot be simply switched from ketene-first to imine-first by changing the substituent on the imine nitrogen atom, which is contrary to the reported experimental results, and both imines go through the ketene-first mechanism with different stereochemistries, which is cis selective for imine-Ts and trans selective for imine-Tf. Based on electronic analyses, the reversal in diastereoselectivity in the N-triflyl imine system could be attributed to the charge transfers and electron-density distribution over the transition states. Therefore, the cis/trans selectivity of the PPY-catalyzed Staudinger reaction could be effectively controlled by the electronic characteristics of the molecular substituents in the reactants. A N-protecting group in imine with a more electron-withdrawing nature seems to accelerate the stereo-determining step, ring closure, and increase the stabilization charge transfers in the transition state, leading to a preference for trans β-lactam formation. It seems that using a N-substituent with a higher electron-withdrawing nature can initially activate the imine by the nucleophilic catalyst in competition with ketene, i.e., imine-first versus ketene-first. These results can provide an insight into select proper substituents for the fragments to synthesis β-lactam with a desired stereochemistry. Also, a comprehensive comparison was performed between calculations with and without dispersion.
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Affiliation(s)
- Farideh Pahlavan
- Department of Chemistry, School of Science, Shiraz University Shiraz 71454 Iran
| | | | - Amin Reza Zolghadr
- Department of Chemistry, School of Science, Shiraz University Shiraz 71454 Iran
| | - Nasser Iranpoor
- Department of Chemistry, School of Science, Shiraz University Shiraz 71454 Iran
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8
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Feng C, Wu Y. Copper-Catalyzed Bifunctionalization/Annulation of Unactivated Alkene with Alkyl Bromides. J Org Chem 2023; 88:15249-15255. [PMID: 37862612 DOI: 10.1021/acs.joc.3c01746] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2023]
Abstract
β-Lactam is a ubiquitous scaffold in bioactive compounds and pharmaceuticals. Herein, we disclose a streamlined method for the construction of β-lactams starting from unactivated alkenes and alkyl bromides via a Cu-catalyzed inter-/intramolecular carboamidation. This reaction proceeded smoothly under mild reaction conditions and exhibited a broad substrate scope and various functional groups. This protocol is not only compatible with 1, 2, and 3° alkyl bromides but also suitable for α-bromo nitrile as well as various benzyl bromides. The mechanism exploration indicated that sequential radical addition/reductive elimination was involved.
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Affiliation(s)
- Cancan Feng
- College of Chemistry, Green Catalysis Center, Henan Key Laboratory of Chemical Biology and Organic Chemistry, Key Laboratory of Applied Chemistry of Henan Universities, Zhengzhou University, Zhengzhou 450052, P. R. China
| | - Yangjie Wu
- College of Chemistry, Green Catalysis Center, Henan Key Laboratory of Chemical Biology and Organic Chemistry, Key Laboratory of Applied Chemistry of Henan Universities, Zhengzhou University, Zhengzhou 450052, P. R. China
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9
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Nie Y, Yuan Q, Zhang W. Axis-Unfixed Biphenylphosphine-Oxazoline Ligands: Design and Applications in Asymmetric Catalytic Reactions. CHEM REC 2023; 23:e202300133. [PMID: 37166412 DOI: 10.1002/tcr.202300133] [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: 04/12/2023] [Revised: 04/27/2023] [Indexed: 05/12/2023]
Abstract
The design and synthesis of chiral ligands plays an important role in asymmetric catalytic reactions. Over the past decades, various types of chiral phosphine-oxazolines (PHOX ligands) have been developed and have greatly advanced the field of asymmetric catalysis. Novel chiral PHOX ligand with an axis-unfixed biphenyl backbone, developed by our group, have shown interesting coordination behavior and excellent chiral inducing ability in various transition-metal-catalyzed asymmetric reactions. This personal account focuses on our developed axis-unfixed biphenylphosphine-oxazoline ligand (BiphPHOX), including an overview of its design and applications, which will provide inspiration for the exploration of novel ligands and related reactions.
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Affiliation(s)
- Yu Nie
- Shanghai Key Laboratory of Molecular Engineering of Chiral Drugs, Frontiers Science Center for Transformative Molecules, School of Chemistry and Chemical Engineering, Shanghai Jiao Tong University, 800 Dongchuan Road, Shanghai, 200240, P. R. China
| | - Qianjia Yuan
- Shanghai Key Laboratory of Molecular Engineering of Chiral Drugs, Frontiers Science Center for Transformative Molecules, School of Chemistry and Chemical Engineering, Shanghai Jiao Tong University, 800 Dongchuan Road, Shanghai, 200240, P. R. China
| | - Wanbin Zhang
- Shanghai Key Laboratory of Molecular Engineering of Chiral Drugs, Frontiers Science Center for Transformative Molecules, School of Chemistry and Chemical Engineering, Shanghai Jiao Tong University, 800 Dongchuan Road, Shanghai, 200240, P. R. China
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10
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Hsu CM, Lin HB, Hou XZ, Tapales RVPP, Shih CK, Miñoza S, Tsai YS, Tsai ZN, Chan CL, Liao HH. Azetidines with All-Carbon Quaternary Centers: Merging Relay Catalysis with Strain Release Functionalization. J Am Chem Soc 2023; 145:19049-19059. [PMID: 37589099 DOI: 10.1021/jacs.3c06710] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 08/18/2023]
Abstract
Given the importance and beneficial characteristics of decorated azetidines in medicinal chemistry, efficient strategies for their synthesis are highly sought after. Herein, we report a facile synthesis of the elusive all-carbon quaternary-center-bearing azetidines. By adopting a well-orchestrated polar-radical relay strategy, ring strain release of bench-stable benzoylated 1-azabicyclo[1.1.0]butane (ABB) can be harnessed for nickel-catalyzed Suzuki Csp2-Csp3 cross-coupling with commercially available boronic acids in broad scope (>50 examples), excellent functional group tolerance, and gram-scale utility. Preliminary mechanistic studies provided insights into the underlying mechanism, wherein the ring opening of ABB with a catalytic quantity of bromide accounts for the conversion of ABB into a redox-active azetidine, which subsequently engages in the cross-coupling reaction through a radical pathway. The synergistic bromide and nickel catalysis could intriguingly be derived from a single nickel source (NiBr2). Application of the method to modify natural products, biologically relevant molecules, and pharmaceuticals has been successfully achieved as well as the synthesis of melanocortin-1 receptor (MC-1R) agonist and vesicular acetylcholine transporter (VAChT) inhibitor analogues through bioisosteric replacements of piperidine with azetidine moieties, highlighting the potential of the method in drug optimization studies. Aside from the synthesis of azetidines, we demonstrate the ancillary utility of our nickel catalytic system toward the restricted Suzuki cross-coupling of tertiary alkyl bromides with aryl boronic acids to construct all-carbon quaternary centers.
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Affiliation(s)
- Che-Ming Hsu
- Department of Chemistry, National Sun Yat-sen University, Kaohsiung 80424, Taiwan (R.O.C.)
| | - Heng-Bo Lin
- Department of Chemistry, National Sun Yat-sen University, Kaohsiung 80424, Taiwan (R.O.C.)
| | - Xin-Zhi Hou
- Department of Chemistry, National Sun Yat-sen University, Kaohsiung 80424, Taiwan (R.O.C.)
| | | | - Chen-Kuei Shih
- Department of Chemistry, National Sun Yat-sen University, Kaohsiung 80424, Taiwan (R.O.C.)
| | - Shinje Miñoza
- Department of Chemistry, National Sun Yat-sen University, Kaohsiung 80424, Taiwan (R.O.C.)
| | - Yu-Syuan Tsai
- Department of Chemistry, National Sun Yat-sen University, Kaohsiung 80424, Taiwan (R.O.C.)
| | - Zong-Nan Tsai
- Department of Chemistry, National Sun Yat-sen University, Kaohsiung 80424, Taiwan (R.O.C.)
| | - Cheng-Lin Chan
- Department of Chemistry, National Sun Yat-sen University, Kaohsiung 80424, Taiwan (R.O.C.)
| | - Hsuan-Hung Liao
- Department of Chemistry, National Sun Yat-sen University, Kaohsiung 80424, Taiwan (R.O.C.)
- Green Hydrogen Research Center, National Sun Yat-sen University, Kaohsiung 80424, Taiwan (R.O.C.)
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11
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Park SH, Bae G, Choi A, Shin S, Shin K, Choi CH, Kim H. Electrocatalytic Access to Azetidines via Intramolecular Allylic Hydroamination: Scrutinizing Key Oxidation Steps through Electrochemical Kinetic Analysis. J Am Chem Soc 2023. [PMID: 37428820 DOI: 10.1021/jacs.3c03172] [Citation(s) in RCA: 13] [Impact Index Per Article: 13.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 07/12/2023]
Abstract
Azetidines are prominent structural scaffolds in bioactive molecules, medicinal chemistry, and ligand design for transition metals. However, state-of-the-art methods cannot be applied to intramolecular hydroamination of allylic amine derivatives despite their underlying potential as one of the most prevalent synthetic precursors to azetidines. Herein, we report an electrocatalytic method for intramolecular hydroamination of allylic sulfonamides to access azetidines for the first time. The merger of cobalt catalysis and electricity enables the regioselective generation of key carbocationic intermediates, which could directly undergo intramolecular C-N bond formation. The mechanistic investigations including electrochemical kinetic analysis suggest that either the catalyst regeneration by nucleophilic cyclization or the second electrochemical oxidation to access the carbocationic intermediate is involved in the rate-determining step (RDS) of our electrochemical protocol and highlight the ability of electrochemistry in providing ideal means to mediate catalyst oxidation.
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Affiliation(s)
- Steve H Park
- Department of Chemistry, Pohang University of Science and Technology (POSTECH), Pohang 37673, Republic of Korea
| | - Geunsu Bae
- Department of Chemistry, Pohang University of Science and Technology (POSTECH), Pohang 37673, Republic of Korea
| | - Ahhyeon Choi
- Department of Chemistry, Pohang University of Science and Technology (POSTECH), Pohang 37673, Republic of Korea
| | - Suyeon Shin
- Department of Chemistry and Nanoscience, Ewha Womans University, Seoul 03760, Republic of Korea
| | - Kwangmin Shin
- Department of Chemistry, Sungkyunkwan University, Suwon 16419, Republic of Korea
| | - Chang Hyuck Choi
- Department of Chemistry, Pohang University of Science and Technology (POSTECH), Pohang 37673, Republic of Korea
- Institute for Convergence Research and Education in Advanced Technology (I-CREATE), Yonsei University, Seoul 03722, Republic of Korea
| | - Hyunwoo Kim
- Department of Chemistry, Pohang University of Science and Technology (POSTECH), Pohang 37673, Republic of Korea
- Institute for Convergence Research and Education in Advanced Technology (I-CREATE), Yonsei University, Seoul 03722, Republic of Korea
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12
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Liang R, Zhou Q, Li X, Wong MW, Chung LW. A Computational Study on the Reaction Mechanism of Stereocontrolled Synthesis of β-Lactam within [2]Rotaxane. J Org Chem 2023. [PMID: 37257155 DOI: 10.1021/acs.joc.3c00330] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/02/2023]
Abstract
The macrocycle effect of [2]rotaxane on the highly trans-stereoselective cyclization reaction of N-benzylfumaramide was extensively investigated by various computational methods, including DFT and high-level DLPNO-CCSD(T) methods. Our computational results suggest that the most favorable mechanism of the CsOH-promoted cyclization of the fumaramide into trans-β-lactam within [2]rotaxane initiates with deprotonation of a N-benzyl group of the interlocked fumaramide substrate by CsOH, followed by the trans-selective C-C bond formation and protonation by one amide functional group of the macrocycle. Our distortion/interaction analysis further shows that the uncommon trans-stereoselective cyclization forming β-lactam within the rotaxane may be attributed to a higher distortion energy (mainly from the distortion of the twisted cis-fumaramide conformation enforced by the rotaxane). Our systematic study should give deeper mechanistic insight into the reaction mechanism influenced by a supramolecular host.
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Affiliation(s)
- Rong Liang
- Shenzhen Grubbs Institute, Department of Chemistry and Guangdong Provincial Key Laboratory of Catalysis, Southern University of Science and Technology, Shenzhen 518055, China
- Department of Chemistry, National University of Singapore, 3 Science Drive 3, 117543, Singapore
| | - Qinghai Zhou
- Shenzhen Grubbs Institute, Department of Chemistry and Guangdong Provincial Key Laboratory of Catalysis, Southern University of Science and Technology, Shenzhen 518055, China
- The Education Ministry Key Lab of Resource Chemistry, Joint International Research Laboratory of Resource Chemistry of Ministry of Education, Shanghai Key Laboratory of Rare Earth Functional Materials, Shanghai Frontiers Science Center of Biomimetic Catalysis, College of Chemistry and Materials Science, Shanghai Normal University, Shanghai 200234, China
| | - Xin Li
- Shenzhen Grubbs Institute, Department of Chemistry and Guangdong Provincial Key Laboratory of Catalysis, Southern University of Science and Technology, Shenzhen 518055, China
| | - Ming Wah Wong
- Department of Chemistry, National University of Singapore, 3 Science Drive 3, 117543, Singapore
| | - Lung Wa Chung
- Shenzhen Grubbs Institute, Department of Chemistry and Guangdong Provincial Key Laboratory of Catalysis, Southern University of Science and Technology, Shenzhen 518055, China
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13
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Kaur N, Grewal P, Bhardwaj P, Verma Y, Ahlawat N. Synthesis of higher-membered heterocycles. SYNTHETIC COMMUN 2023. [DOI: 10.1080/00397911.2023.2172350] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
Affiliation(s)
- Navjeet Kaur
- Division of Research and Development, Department of Chemistry, Lovely Professional University, Phagwara, India
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14
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Ramdar M, Kazemi F, Eskandari P, Mirzaei M, Kaboudin B, Taran Z. N-Formylation of Amines via Trapping of Degradation Intermediate of Ethers. J Photochem Photobiol A Chem 2023. [DOI: 10.1016/j.jphotochem.2023.114555] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
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15
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Yan J, Ding Y, Huang H. Palladium-Catalyzed Chemodivergent Carbonylation of ortho-Bromoarylimine to Biisoindolinones and Spiroisoindolinones. J Org Chem 2022; 88:5194-5204. [PMID: 36332180 DOI: 10.1021/acs.joc.2c02170] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Abstract
We herein report a palladium-catalyzed carbonylative cyclization reaction of ortho-bromoarylimines that allows for the chemodivergent synthesis of functionalized biisoindolinones and spirocyclic isoindolinones. Either product could be selectively obtained by switching the reaction temperatures and ligands, and the biisoindolinone products could be afforded facilely with catalyst loadings as low as 0.05 mol %. Further transformation of the biisoindolinone product is also described, which represents a novel and concise approach to the biisoindoline diamine ligand.
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Affiliation(s)
- Jiaqi Yan
- Hefei National Research Center for Physical Sciences at the Microscale and Department of Chemistry, Center for Excellence in Molecular Synthesis of CAS, University of Science and Technology of China, Hefei 230026, P. R. China
| | - Yongzheng Ding
- Hefei National Research Center for Physical Sciences at the Microscale and Department of Chemistry, Center for Excellence in Molecular Synthesis of CAS, University of Science and Technology of China, Hefei 230026, P. R. China
| | - Hanmin Huang
- Hefei National Research Center for Physical Sciences at the Microscale and Department of Chemistry, Center for Excellence in Molecular Synthesis of CAS, University of Science and Technology of China, Hefei 230026, P. R. China
- State Key Laboratory of Oxo Synthesis and Selective Oxidation, Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences, Lanzhou 730000, P. R. China
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16
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Mohamed A, Al-Awadhi FH, Al-Awadi NA. Variable-Sized bis(4-spiro-fused-β-lactam)-Based Unsaturated Macrocycles: Synthesis and Characterization. ACS OMEGA 2022; 7:36795-36803. [PMID: 36278047 PMCID: PMC9583306 DOI: 10.1021/acsomega.2c05212] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/14/2022] [Accepted: 09/19/2022] [Indexed: 06/16/2023]
Abstract
The synthesis with structural identifications including NMR and HRMS spectral data along with single-crystal X-ray diffraction analysis (for 20b, 23b, 25b-27b) of a family of 14 new syn/anti bis-4-spiro-β-lactam-based unsaturated macrocycles (19a,b-27a,b), obtained by multistep synthesis including (i) diimine formation, (ii) Staudinger [2 + 2] ketene-imine cycloaddition, and (iii) ring-closing metathesis (RCM), is reported.
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Affiliation(s)
- Asaad
S. Mohamed
- Department
of Chemistry, Faculty of Science, Kuwait
University, P.O. Box 5969, Safat 13060, Kuwait
| | - Fatma H. Al-Awadhi
- Department
of Pharmaceutical Chemistry, Faculty of Pharmacy, Kuwait University, Safat 13060, Kuwait
| | - Nouria A. Al-Awadi
- Department
of Chemistry, Faculty of Science, Kuwait
University, P.O. Box 5969, Safat 13060, Kuwait
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17
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Alam T, Rakshit A, Dhara HN, Palai A, Patel BK. Electrochemical Amidation: Benzoyl Hydrazine/Carbazate and Amine as Coupling Partners. Org Lett 2022; 24:6619-6624. [PMID: 36069423 DOI: 10.1021/acs.orglett.2c02626] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
An electrochemical amidation of benzoyl hydrazine/carbazate and primary/secondary amine as coupling partners via concomitant cleavage and formation of C(sp2)-N bonds has been achieved. This methodology proceeds under metal-free and exogenous oxidant-free conditions producing N2 and H2 as byproducts. Mechanistic studies reveal the in situ generations of both acyl and N-centered radicals from benzoyl hydrazines and amines. The utility of this protocol is demonstrated through a large-scale, and synthesis of bezafibrate, a hyperlipidemic drug.
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Affiliation(s)
- Tipu Alam
- Department of Chemistry, Indian Institute of Technology Guwahati, North Guwahati 781039, India
| | - Amitava Rakshit
- Department of Chemistry, Indian Institute of Technology Guwahati, North Guwahati 781039, India
| | - Hirendra Nath Dhara
- Department of Chemistry, Indian Institute of Technology Guwahati, North Guwahati 781039, India
| | - Angshuman Palai
- Department of Chemistry, Indian Institute of Technology Guwahati, North Guwahati 781039, India
| | - Bhisma K Patel
- Department of Chemistry, Indian Institute of Technology Guwahati, North Guwahati 781039, India
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18
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Yu X, Tang Z, He K, Li W, Lin J, Jin Y. Catalyst-free highly regioselective hydrated ring-opening and formylation of quinazolinones. Org Biomol Chem 2022; 20:6654-6658. [PMID: 35938290 DOI: 10.1039/d2ob01234k] [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
A catalyst-free method for the highly regioselective hydrated ring-opening and formylation of quinazolinones was developed. This reaction realized the direct arylation of two nitrogen atoms on quinazolinones and realized the regioselective ring-opening of quinazolinone and subsequent acylation of methyleneamine through the nucleophilic addition of a water molecule to an imine carbon atom. It showed reasonable functional group compatibility and provided one-pot access to a variety of N-arylformyl derivatives in moderate to excellent yields.
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Affiliation(s)
- Xianglin Yu
- Key Laboratory of Medicinal Chemistry for Natural Resource (Yunnan University), Ministry Education, School of Chemical Science and Technology, Yunnan University, Kunming, 650091, P. R. China.
| | - Zhiliang Tang
- Key Laboratory of Medicinal Chemistry for Natural Resource (Yunnan University), Ministry Education, School of Chemical Science and Technology, Yunnan University, Kunming, 650091, P. R. China.
| | - Kun He
- Key Laboratory of Medicinal Chemistry for Natural Resource (Yunnan University), Ministry Education, School of Chemical Science and Technology, Yunnan University, Kunming, 650091, P. R. China.
| | - Weina Li
- Key Laboratory of Medicinal Chemistry for Natural Resource (Yunnan University), Ministry Education, School of Chemical Science and Technology, Yunnan University, Kunming, 650091, P. R. China.
| | - Jun Lin
- Key Laboratory of Medicinal Chemistry for Natural Resource (Yunnan University), Ministry Education, School of Chemical Science and Technology, Yunnan University, Kunming, 650091, P. R. China.
| | - Yi Jin
- Key Laboratory of Medicinal Chemistry for Natural Resource (Yunnan University), Ministry Education, School of Chemical Science and Technology, Yunnan University, Kunming, 650091, P. R. China.
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19
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Feng M, Mosiagin I, Kaiser D, Maryasin B, Maulide N. Deployment of Sulfinimines in Charge-Accelerated Sulfonium Rearrangement Enables a Surrogate Asymmetric Mannich Reaction. J Am Chem Soc 2022; 144:13044-13049. [PMID: 35839521 PMCID: PMC9374180 DOI: 10.1021/jacs.2c05368] [Citation(s) in RCA: 9] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
β-Amino acid derivatives are key structural elements in synthetic and biological chemistry. Despite being a hallmark method for their preparation, the direct Mannich reaction encounters significant challenges when carboxylic acid derivatives are employed. Indeed, not only is chemoselective enolate formation a pitfall (particularly with carboxamides), but most importantly the inability to reliably access α-tertiary amines through an enolate/ketimine coupling is an unsolved problem of this century-old reaction. Herein, we report a strategy enabling the first direct coupling of carboxamides with ketimines for the diastereo- and enantioselective synthesis of β-amino amides. This conceptually novel approach hinges on the innovative deployment of enantiopure sulfinimines in sulfonium rearrangements, and at once solves the problems of chemoselectivity, reactivity, and (relative and absolute) stereoselectivity of the Mannich process. In-depth computational studies explain the observed, unexpected (dia)stereoselectivity and showcase the key role of intramolecular interactions, including London dispersion, for the accurate description of the reaction mechanism.
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Affiliation(s)
- Minghao Feng
- Institute of Organic Chemistry, University of Vienna, Währinger Strasse 38, 1090 Vienna, Austria
| | - Ivan Mosiagin
- Institute of Organic Chemistry, University of Vienna, Währinger Strasse 38, 1090 Vienna, Austria
| | - Daniel Kaiser
- Institute of Organic Chemistry, University of Vienna, Währinger Strasse 38, 1090 Vienna, Austria
| | - Boris Maryasin
- Institute of Organic Chemistry, University of Vienna, Währinger Strasse 38, 1090 Vienna, Austria.,Institute of Theoretical Chemistry, University of Vienna, Währinger Strasse 17, 1090 Vienna, Austria
| | - Nuno Maulide
- Institute of Organic Chemistry, University of Vienna, Währinger Strasse 38, 1090 Vienna, Austria
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20
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Substrate-controlled selective acylation of quinazolinones: Access to 2-benzamido-N-formylbenzamides and 3-benzoylquinazolinones. Tetrahedron Lett 2022. [DOI: 10.1016/j.tetlet.2022.153988] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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21
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Missioui M, Guerrab W, Nchioua I, El Moutaouakil Ala Allah A, Kalonji Mubengayi C, Alsubari A, Mague JT, Ramli Y. Crystal structure and Hirshfeld surface analysis of 2-chloro- N-(4-meth-oxy-phen-yl)acetamide. Acta Crystallogr E Crystallogr Commun 2022; 78:687-690. [PMID: 35855360 PMCID: PMC9260361 DOI: 10.1107/s205698902200576x] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/18/2022] [Accepted: 05/28/2022] [Indexed: 11/10/2022]
Abstract
In the title mol-ecule, C9H10ClNO2, the meth-oxy group lies very close to the plane of the phenyl ring while the acetamido group is twisted out of this plane by 28.87 (5)°. In the crystal, a three-dimensional structure is generated by N-H⋯O, C-H⋯O and C-H⋯Cl hydrogen bonds plus C-H⋯π(ring) inter-actions. A Hirshfeld surface analysis of the inter-molecular inter-actions was performed and indicated that C⋯H/H⋯C inter-actions make the largest contribution to the surface area (33.4%).
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Affiliation(s)
- Mohcine Missioui
- Laboratory of Medicinal Chemistry, Drug Sciences Research Center, Faculty of Medicine and Pharmacy, Mohammed V University in Rabat, Morocco
| | - Walid Guerrab
- Laboratory of Medicinal Chemistry, Drug Sciences Research Center, Faculty of Medicine and Pharmacy, Mohammed V University in Rabat, Morocco
| | - Intissar Nchioua
- Laboratory of Medicinal Chemistry, Drug Sciences Research Center, Faculty of Medicine and Pharmacy, Mohammed V University in Rabat, Morocco
| | | | - Camille Kalonji Mubengayi
- Laboratoire de Chimie et Biochimie, Institut Superieur des Techniques Medicales de Kinshasa, Republique Democratique du , Congo
| | - Abdulsalam Alsubari
- Laboratory of Medicinal Chemistry, Faculty of Clinical Pharmacy, 21 September University, Yemen
| | - Joel T. Mague
- Department of Chemistry, Tulane University, New Orleans, LA 70118, USA
| | - Youssef Ramli
- Laboratory of Medicinal Chemistry, Drug Sciences Research Center, Faculty of Medicine and Pharmacy, Mohammed V University in Rabat, Morocco
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22
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Bayzidi M, Zeynizadeh B. A uniformly anchored zirconocene complex on magnetic reduced graphene oxide (rGO@Fe 3O 4/ZrCp 2Cl x (x = 0, 1, 2)) as a novel and reusable nanocatalyst for synthesis of N-arylacetamides and reductive-acetylation of nitroarenes. RSC Adv 2022; 12:15020-15037. [PMID: 35702429 PMCID: PMC9112892 DOI: 10.1039/d2ra02293a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/08/2022] [Accepted: 05/09/2022] [Indexed: 11/21/2022] Open
Abstract
In this study, a crafted zirconocene complex on rGO@Fe3O4 as a novel magnetic nanocatalyst was synthesized and then characterized using FT-IR, SEM, EDX, VSM, ICP-OES, TGA, BET and MS analyses. Next, catalytic activity of the prepared nanocomposite rGO@Fe3O4/ZrCp2Cl x (x = 0, 1, 2) towards successful reduction of aromatic nitro compounds to arylamines using N2H4·H2O (80%) was investigated. The examined nanocatalyst also showed perfect catalytic activity for reductive-acetylation of aromatic nitro compounds to the corresponding N-arylacetamides without isolation of the prepared in situ amines using the N2H4·H2O/Ac2O system. Furthermore, acetylation of the commercially available arylamines to the corresponding N-arylacetamides was carried out by acetic anhydride in the presence of the rGO@Fe3O4/ZrCp2Cl x (x = 0, 1, 2) nanocomposite. All reactions were carried out in refluxing EtOH as a green solvent to afford the products in high yields. The obtained results exhibited that the nanocomposite of rGO@Fe3O4/ZrCp2Cl x (x = 0, 1, 2) showed a great catalytic activity in comparison to rGO and rGO@Fe3O4 as the parent constituents. Recovery and reusability of rGO@Fe3O4/ZrCp2Cl x (x = 0, 1, 2) were also examined for 8 consecutive cycles without significant loss of the catalytic activity. This establishes the sustainable anchoring of the zirconocene complex on the surface and mesopores of the rGO@Fe3O4 nanohybrid system.
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Affiliation(s)
- Massood Bayzidi
- Department of Chemistry, Urmia University Urmia 5756151818 Iran
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23
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Ji DS, Liang H, Yang KX, Feng ZT, Luo YC, Xu GQ, Gu Y, Xu PF. Solvent directed chemically divergent synthesis of β-lactams and α-amino acid derivatives with chiral isothiourea. Chem Sci 2022; 13:1801-1807. [PMID: 35282623 PMCID: PMC8826511 DOI: 10.1039/d1sc06127e] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/04/2021] [Accepted: 01/18/2022] [Indexed: 01/01/2023] Open
Abstract
A protocol for the chemically divergent synthesis of β-lactams and α-amino acid derivatives with isothiourea (ITU) catalysis by switching solvents was developed. The stereospecific Mannich reaction occurring between imine and C(1)-ammonium enolate generated zwitterionic intermediates, which underwent intramolecular lactamization and afforded β-lactam derivatives when DCM and CH3CN were used as solvents. However, when EtOH was used as the solvent, the intermediates underwent an intermolecular esterification reaction, and α-amino acid derivatives were produced. Detailed mechanistic experiments were conducted to prove that these two kinds of products came from the same intermediates. Furthermore, chemically diversified transformations of β-lactam and α-amino acid derivatives were achieved. A protocol for the solvent directed chemically divergent synthesis of β-lactam and α-amino acid derivatives with chiral isothiourea was reported.![]()
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Affiliation(s)
- Dong-Sheng Ji
- State Key Laboratory of Applied Organic Chemistry, College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou, 730000, P. R. China
| | - Hui Liang
- State Key Laboratory of Applied Organic Chemistry, College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou, 730000, P. R. China
| | - Kai-Xuan Yang
- State Key Laboratory of Applied Organic Chemistry, College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou, 730000, P. R. China
| | - Zhi-Tao Feng
- Department of Chemistry, University of California Davis, One Shields Avenue, Davis, California, 95616, USA
| | - Yong-Chun Luo
- State Key Laboratory of Applied Organic Chemistry, College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou, 730000, P. R. China
| | - Guo-Qiang Xu
- State Key Laboratory of Applied Organic Chemistry, College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou, 730000, P. R. China
| | - Yucheng Gu
- Syngenta Jealott's Hill International Research Centre, Bracknell, Berkshire, RG42 6EY, UK
| | - Peng-Fei Xu
- State Key Laboratory of Applied Organic Chemistry, College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou, 730000, P. R. China
- State Key Laboratory of Veterinary Etiological Biology, College of Veterinary Medicine, Lanzhou University, Lanzhou, 730000, P. R. China
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24
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Tang J, Yan ZH, Zhan G, Yang QQ, Chen YY, Li X, Huang W. Visible-Light-Mediated Sequential Wolff Rearrangement and Staudinger Cycloaddition Enabling Assembly of Spiro-Pyrazolone-β-Lactams. Org Chem Front 2022. [DOI: 10.1039/d2qo00742h] [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
Visible-light-mediated sequential Wolff rearrangement and Staudinger cycloaddition for the assembly of valuable spiro-pyrazolone-β-lactams for the first time is disclosed by utilizing in situ generated ketenes and pyrazolone ketimines. This powerful...
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25
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Shao Y, Tian S, Zhu J, Tang S, Sun J. Diastereoselective formation of β-lactams via a three-component reaction. NEW J CHEM 2022. [DOI: 10.1039/d2nj01129h] [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
A highly diastereoselective three-component reaction of N-hydroxyanilines, diazo compounds and cyclobutenones to form densely functionalized β-lactams has been realized.
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Affiliation(s)
- Ying Shao
- Jiangsu Key Laboratory of Advanced Catalytic Materials & Technology, School of Petrochemical Engineering, Changzhou University, Changzhou 213164, China
| | - Shijie Tian
- Jiangsu Key Laboratory of Advanced Catalytic Materials & Technology, School of Petrochemical Engineering, Changzhou University, Changzhou 213164, China
| | - Jie Zhu
- Jiangsu Key Laboratory of Advanced Catalytic Materials & Technology, School of Petrochemical Engineering, Changzhou University, Changzhou 213164, China
| | - Shengbiao Tang
- Jiangsu Key Laboratory of Advanced Catalytic Materials & Technology, School of Petrochemical Engineering, Changzhou University, Changzhou 213164, China
| | - Jiangtao Sun
- Jiangsu Key Laboratory of Advanced Catalytic Materials & Technology, School of Petrochemical Engineering, Changzhou University, Changzhou 213164, China
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26
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Cho S, Lee Y, Lee K, Lee H, Lee Y, Jung B. Synthesis of alkynamides through reaction of alkyl- or aryl-substituted alkynylaluminums with isocyanates. Org Biomol Chem 2021; 20:139-151. [PMID: 34874041 DOI: 10.1039/d1ob01990b] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Abstract
An efficient and facile method for the preparation of alkynamides through Et3N-catalyzed alumination of alkyl- or aryl-substituted terminal alkynes with AlMe3 and sequential nucleophilic addition of in situ generated alkynylaluminums to isocyanates is described. This method has the merits of using readily available isocyanates and monosubstituted alkynes, easy access to organoaluminums, short reaction times, and high efficiency. A gram-scale synthesis of the desired alkynamide and its application to the formation of α-methylene-β-lactams demonstrates the synthetic utility of this method.
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Affiliation(s)
- Soohong Cho
- Department of Chemistry, Kwangwoon University, Seoul 01897, Republic of Korea.
| | - Yeonjoo Lee
- Department of Emerging Materials Science, DGIST, Daegu 42988, Republic of Korea.
| | - Kyeongmin Lee
- Department of Chemistry, Kwangwoon University, Seoul 01897, Republic of Korea.
| | - Hwiwoong Lee
- Department of Chemistry, Kwangwoon University, Seoul 01897, Republic of Korea.
| | - Yunmi Lee
- Department of Chemistry, Kwangwoon University, Seoul 01897, Republic of Korea.
| | - Byunghyuck Jung
- Department of Emerging Materials Science, DGIST, Daegu 42988, Republic of Korea.
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27
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Jiang J, Li L, Zhang L, Chen Q, Sun H, Liao S, Li C, Zhang L. Organophosphoric Acid Promoted Transamidation: Using
N
,
N
‐Dimethylformamide and
N
,
N
‐Dimethylacetamide as the Acyl Sources. ChemistrySelect 2021. [DOI: 10.1002/slct.202103932] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Jian Jiang
- State Key Laboratory of Functions and Applications of Medicinal Plants & School of Pharmaceutical Sciences Guizhou Medical University 550004 Guiyang China
| | - Linlin Li
- State Key Laboratory of Functions and Applications of Medicinal Plants & School of Pharmaceutical Sciences Guizhou Medical University 550004 Guiyang China
| | - Ling Zhang
- State Key Laboratory of Functions and Applications of Medicinal Plants & School of Pharmaceutical Sciences Guizhou Medical University 550004 Guiyang China
| | - Qian Chen
- State Key Laboratory of Functions and Applications of Medicinal Plants & School of Pharmaceutical Sciences Guizhou Medical University 550004 Guiyang China
| | - Hao Sun
- State Key Laboratory of Functions and Applications of Medicinal Plants & School of Pharmaceutical Sciences Guizhou Medical University 550004 Guiyang China
| | - Shanggao Liao
- State Key Laboratory of Functions and Applications of Medicinal Plants & School of Pharmaceutical Sciences Guizhou Medical University 550004 Guiyang China
| | - Chun Li
- State Key Laboratory of Functions and Applications of Medicinal Plants & School of Pharmaceutical Sciences Guizhou Medical University 550004 Guiyang China
| | - Lin Zhang
- State Key Laboratory of Functions and Applications of Medicinal Plants & School of Pharmaceutical Sciences Guizhou Medical University 550004 Guiyang China
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28
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Visible-Light-Mediated Strategies to Assemble Alkyl 2-Carboxylate-2,3,3-Trisubstituted β-Lactams and 5-Alkoxy-2,2,4-Trisubstituted Furan-3(2H)-ones Using Aryldiazoacetates and Aryldiazoketones. Org Lett 2021; 23:9292-9296. [PMID: 34797682 DOI: 10.1021/acs.orglett.1c03662] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
Abstract
Two new visible-light-mediated strategies are described starting from aryldiazoacetates. The first approach describes their reaction with azides to afford the corresponding imines, and then reaction with aryldiazoketones produces alkyl 2-carboxylate-2,3,3-trisubstituted β-lactams. The second approach describes the reaction with sulfoxides to afford the corresponding sulfoxonium ylides, followed by reaction with aryldiazoketones to produce 5-alkoxy-2,2,4-trisubstituted furan-3(2H)-ones. These protocols take advantage of the photolysis of aryldiazoacetates and the photochemically promoted Wolff rearrangement of aryldiazoketones.
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29
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Martelli G, Cirillo M, Giraldi V, Giacomini D. Chemoenzymatic enantioselective route to get (+) and (-) 4-acetoxy-azetidin-2-one by Lipase-catalysed kinetic resolution and their applications. Bioorg Chem 2021; 120:105580. [DOI: 10.1016/j.bioorg.2021.105580] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/05/2021] [Revised: 11/04/2021] [Accepted: 12/19/2021] [Indexed: 11/02/2022]
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30
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Kapoor A, Rajput JK. Staudinger k
etene–imine
[2+2] cycloaddition of novel azomethines to synthesize biologically active azetidinone derivatives and their in vitro antimicrobial studies. J Heterocycl Chem 2021. [DOI: 10.1002/jhet.4357] [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)
- Atul Kapoor
- Department of Chemistry Dr. B.R Ambedkar National Institute of Technology Jalandhar India
| | - Jaspreet Kaur Rajput
- Department of Chemistry Dr. B.R Ambedkar National Institute of Technology Jalandhar India
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31
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Abstract
Various cis-β-phosphinolactams are synthesized stereoselectively for the first time from imines and diazo(aryl)methyl(diaryl)phosphine oxides under microwave irradiation. Diazo(aryl)methyl(diaryl)phosphine oxides first undergo the Wolf rearrangement to generate phosphenes. Imines nucleophilically attack the phosphenes followed by an intramolecular nucleophilic addition via less steric transition states to give final cis-β-phosphinolactams. C-Styrylimines generally give rise to β-phosphinolactams in higher yields than C-arylimines. The stereoselectivity and proposed mechanism are rationalized by DFT theoretical calculation.
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Affiliation(s)
- Xingyang Fu
- State Key Laboratory of Chemical Resource Engineering, Department of Organic Chemistry, College of Chemistry, Beijing University of Chemical Technology, Beijing 100029, People's Republic of China
| | - Xinyao Li
- Department of Chemistry, College of Science, Shanghai University, Shanghai University, Shanghai 200444, China
| | - Jiaxi Xu
- State Key Laboratory of Chemical Resource Engineering, Department of Organic Chemistry, College of Chemistry, Beijing University of Chemical Technology, Beijing 100029, People's Republic of China
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32
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Mohamadzadeh M, Zarei M. Anticancer activity and evaluation of apoptotic genes expression of 2-azetidinones containing anthraquinone moiety. Mol Divers 2021; 25:2429-2439. [PMID: 32944866 DOI: 10.1007/s11030-020-10142-x] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/14/2020] [Accepted: 09/05/2020] [Indexed: 01/07/2023]
Abstract
Nowadays, one of the principal causes of death in the world is cancer. A series of 2-azetidinones containing anthraquinone moiety with various substituents were synthesized using [2 + 2] ketene-imine cycloaddition (Staudinger ketene-imine cycloaddition), and their cytotoxicity against some human cancer and normal cell lines was evaluated. Some of these hybrid compounds showed moderate to significant cytotoxicity against breast carcinoma (MCF7), colon carcinoma (HCT116), prostate carcinoma (PC3), and neuroblastoma (SKNMC) cell lines via MTT assay. Surprisingly, hybrid 4gh with the best anticancer activity demonstrated very good antibacterial and antifungal activities. This compound was selected to study to test on human fibroblast (Hu02) normal cell and comparison with doxorubicin. While 2-azetidinone 4gh represented similar cytotoxicity against cancer cell lines compared to doxorubicin, the 2-azetidinone demonstrated lower cytotoxicity against human fibroblast (Hu02) than doxorubicin. Further real-time PCR investigation displayed the expression of Bcl-xl, KI-67, TPX2 and BAX genes were significantly increased or decreased as desired in the cancer cell lines studied by treatment with doxorubicin or 2-azetidinone-anthraquinone 4gh. Molecular docking studies represented that hybrid 4gh strongly fitted the active site of topoisomerase II (PDB 4G0V) with hydrogen bond and hydrophobic interactions.
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Affiliation(s)
- Masoud Mohamadzadeh
- Department of Biochemistry, Shiraz Branch, Islamic Azad University, Shiraz, Iran
| | - Maaroof Zarei
- Department of Biochemistry, Shiraz Branch, Islamic Azad University, Shiraz, Iran.
- Department of Chemistry, Faculty of Sciences, University of Hormozgan, Bandar Abbas, 71961, Iran.
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33
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Enantioselective formal carbene insertion into C–N bond of aminal as a concise track to chiral α-amino-β2,2-amino acids and synthetic applications. GREEN SYNTHESIS AND CATALYSIS 2021. [DOI: 10.1016/j.gresc.2021.10.007] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022] Open
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34
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Abstract
In this contribution, we provide a comprehensive overview of acyclic twisted amides, covering the literature since 1993 (the year of the first recognized report on acyclic twisted amides) through June 2020. The review focuses on classes of acyclic twisted amides and their key structural properties, such as amide bond twist and nitrogen pyramidalization, which are primarily responsible for disrupting nN to π*C═O conjugation. Through discussing acyclic twisted amides in comparison with the classic bridged lactams and conformationally restricted cyclic fused amides, the reader is provided with an overview of amidic distortion that results in novel conformational features of acyclic amides that can be exploited in various fields of chemistry ranging from organic synthesis and polymers to biochemistry and structural chemistry and the current position of acyclic twisted amides in modern chemistry.
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Affiliation(s)
- Guangrong Meng
- Department of Chemistry, Rutgers University, 73 Warren Street, Newark, New Jersey 07102, United States
| | - Jin Zhang
- Department of Chemistry, Rutgers University, 73 Warren Street, Newark, New Jersey 07102, United States
- College of Chemistry and Chemical Engineering, Key Laboratory of Chemical Additives for China National Light Industry, Shaanxi University of Science and Technology, Xi'an 710021, China
| | - Michal Szostak
- Department of Chemistry, Rutgers University, 73 Warren Street, Newark, New Jersey 07102, United States
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35
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Abstract
The mechanism of the Kinugasa reaction, that is, the copper-catalyzed formation of β-lactams from nitrones and terminal alkynes, is re-evaluated by means of density functional theory calculations and in light of recent experimental findings. Different possible mechanistic scenarios are investigated using phenanthroline as a ligand and triethylamine as a base. The calculations confirm that after an initial two-step cycloaddition promoted by two copper ions, the resulting five-membered ring intermediate can undergo a fast and irreversible cycloreversion to generate an imine and a dicopper-ketenyl intermediate. From there, the reaction can proceed through a nucleophilic attack of a ketenyl copper intermediate on the imine and an intramolecular cyclization, rather than through the previously suggested (2 + 2) Staudinger synthesis.
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Affiliation(s)
- Stefano Santoro
- Department of Chemistry, Biology and Biotechnology, University of Perugia, Via Elce di Sotto 8, 06123 Perugia, Italy
| | - Fahmi Himo
- Department of Organic Chemistry, Arrhenius Laboratory, Stockholm University, SE-106 91 Stockholm, Sweden
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36
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Yamamoto Y, Kodama S, Nishimura R, Nomoto A, Ueshima M, Ogawa A. One-Pot Construction of Diverse β-Lactam Scaffolds via the Green Oxidation of Amines and Its Application to the Diastereoselective Synthesis of β-Amino Acids. J Org Chem 2021; 86:11571-11582. [PMID: 34319738 DOI: 10.1021/acs.joc.1c01128] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
In this study, a simple one-pot construction of β-lactam scaffolds was successfully achieved via 4,6-dihydroxysalicylic acid-catalyzed organocatalytic oxidation of amines to imines using molecular oxygen. Although some imines are highly unstable and difficult to isolate by conventional methods, the organocatalytic oxidation of amines described herein, followed by their direct reaction with acyl chlorides in the presence of a base, afforded a series of new β-lactam derivatives with excellent cis selectivity, which could not be synthesized and isolated by previously reported methods. Thus, this one-pot protocol will be one of the powerful methods applicable to the synthesis of various potential drug candidates and functional molecules. Furthermore, the subsequent hydrolysis of these β-lactams successfully afforded the corresponding β-amino acids as almost single diastereomers in up to 99% yields.
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Affiliation(s)
- Yuki Yamamoto
- Department of Applied Chemistry, Graduate School of Engineering, Osaka Prefecture University, 1-1 Gakuen-cho, Nakaku, Sakai, Osaka 599-8531, Japan
| | - Shintaro Kodama
- Department of Applied Chemistry, Graduate School of Engineering, Osaka Prefecture University, 1-1 Gakuen-cho, Nakaku, Sakai, Osaka 599-8531, Japan
| | - Riku Nishimura
- Department of Applied Chemistry, Graduate School of Engineering, Osaka Prefecture University, 1-1 Gakuen-cho, Nakaku, Sakai, Osaka 599-8531, Japan
| | - Akihiro Nomoto
- Department of Applied Chemistry, Graduate School of Engineering, Osaka Prefecture University, 1-1 Gakuen-cho, Nakaku, Sakai, Osaka 599-8531, Japan
| | - Michio Ueshima
- Department of Applied Chemistry, Graduate School of Engineering, Osaka Prefecture University, 1-1 Gakuen-cho, Nakaku, Sakai, Osaka 599-8531, Japan
| | - Akiya Ogawa
- Department of Applied Chemistry, Graduate School of Engineering, Osaka Prefecture University, 1-1 Gakuen-cho, Nakaku, Sakai, Osaka 599-8531, Japan
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37
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He J, Zhang X, He Q, Guo H, Fan R. Synthesis of 15N-labeled heterocycles via the cleavage of C-N bonds of anilines and glycine- 15N. Chem Commun (Camb) 2021; 57:5442-5445. [PMID: 33949517 DOI: 10.1039/d1cc01734a] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A nitrogen replacement process that directly incorporates the 15N atom of glycine-15N into anilines was reported. The process involves a Csp2-N bond cleavage of anilines driven by dearomatization and a Csp3-N bond cleavage of glycine-15N driven by aromatization. A variety of 15N-labeled aromatic heterocycles can be prepared via this process.
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Affiliation(s)
- Jiwen He
- Academy for Engineering and Technology, Fudan University, 220 Handan Road, Shanghai 200433, China
| | - Xingguo Zhang
- College of Chemistry and Materials Engineering, Wenzhou University, Wenzhou 325035, China
| | - Qiuqin He
- Department of Chemistry, Fudan University, 2005 Songhu Road, Shanghai 200438, China
| | - Hao Guo
- Academy for Engineering and Technology, Fudan University, 220 Handan Road, Shanghai 200433, China and Department of Chemistry, Fudan University, 2005 Songhu Road, Shanghai 200438, China
| | - Renhua Fan
- Department of Chemistry, Fudan University, 2005 Songhu Road, Shanghai 200438, China
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38
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Wang B, Cao D, Ma X, Feng Y, Zhang L, Zhang Y, Liu C. Synthesis of N-arylacetamides via amination of aryltriazenes with acetonitrile under metal-free and mild conditions. ARAB J CHEM 2021. [DOI: 10.1016/j.arabjc.2021.103158] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022] Open
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39
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Ye J, Bellotti P, Paulisch TO, Daniliuc CG, Glorius F. Durch sichtbares Licht vermittelte Cycloadditionen von α‐Ketoacylsilanen mit Iminen: Einfache Synthese von β‐Lactamen. Angew Chem Int Ed Engl 2021. [DOI: 10.1002/ange.202102451] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Jian‐Heng Ye
- Organisch-Chemisches Institut Westfälische Wilhelms-Universität Münster Corrensstraße 40 48149 Münster Deutschland
| | - Peter Bellotti
- Organisch-Chemisches Institut Westfälische Wilhelms-Universität Münster Corrensstraße 40 48149 Münster Deutschland
| | - Tiffany O. Paulisch
- Organisch-Chemisches Institut Westfälische Wilhelms-Universität Münster Corrensstraße 40 48149 Münster Deutschland
| | - Constantin G. Daniliuc
- Organisch-Chemisches Institut Westfälische Wilhelms-Universität Münster Corrensstraße 40 48149 Münster Deutschland
| | - Frank Glorius
- Organisch-Chemisches Institut Westfälische Wilhelms-Universität Münster Corrensstraße 40 48149 Münster Deutschland
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40
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Ye JH, Bellotti P, Paulisch TO, Daniliuc CG, Glorius F. Visible-Light-Induced Cycloaddition of α-Ketoacylsilanes with Imines: Facile Access to β-Lactams. Angew Chem Int Ed Engl 2021; 60:13671-13676. [PMID: 33729650 DOI: 10.1002/anie.202102451] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/17/2021] [Revised: 03/09/2021] [Indexed: 11/06/2022]
Abstract
We report the synthesis of β-lactams from α-ketoacylsilanes and imines, which proceeds via a formal [2+2] photochemical cycloaddition with in situ generation of siloxyketene. This mild and operationally simple reaction proceeds in an atom-economic fashion with broad substrate scope, including aldimines, ketimines, hydrazones, and fused nitrogen heterocycles, affording a variety of important β-lactams with satisfactory diastereoselectivities in most cases. This reaction also features good functional-group tolerance, facile scalability and product diversification. Experimental and computational studies suggest that α-ketoacylsilanes can serve as photochemical precursors by engaging in a 1,3 silicon shift to the distal carbonyl group.
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Affiliation(s)
- Jian-Heng Ye
- Organisch-Chemisches Institut, Westfälische Wilhelms-Universität Münster, Corrensstraße 40, 48149, Münster, Germany
| | - Peter Bellotti
- Organisch-Chemisches Institut, Westfälische Wilhelms-Universität Münster, Corrensstraße 40, 48149, Münster, Germany
| | - Tiffany O Paulisch
- Organisch-Chemisches Institut, Westfälische Wilhelms-Universität Münster, Corrensstraße 40, 48149, Münster, Germany
| | - Constantin G Daniliuc
- Organisch-Chemisches Institut, Westfälische Wilhelms-Universität Münster, Corrensstraße 40, 48149, Münster, Germany
| | - Frank Glorius
- Organisch-Chemisches Institut, Westfälische Wilhelms-Universität Münster, Corrensstraße 40, 48149, Münster, Germany
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41
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Narula D, Bari SS, Yadav P, Khullar S, Mandal SK, Kaur G, Chaudhary GR, Bhalla A. Synthesis of α‐Heterocycle Anchored Spirocyclic Azetidin‐2‐ones in a Minute by
p
‐TSA Catalyzed Cyclocondensation of Azetidin‐2,3‐diones with Difunctionalized Substrates. ChemistrySelect 2021. [DOI: 10.1002/slct.202101104] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Dipika Narula
- Department of Chemistry and Centre of Advanced Studies in Chemistry Panjab University Chandigarh 160014 India
| | - Shamsher S. Bari
- Department of Chemistry and Centre of Advanced Studies in Chemistry Panjab University Chandigarh 160014 India
| | - Pooja Yadav
- Department of Chemistry and Centre of Advanced Studies in Chemistry Panjab University Chandigarh 160014 India
| | - Sadhika Khullar
- Department of Chemistry Dr. B. R. Ambedkar National Institute of Technology Jalandhar 144011, Punjab India
| | - Sanjay K. Mandal
- Department of Chemical Sciences Indian Institute of Science Education and Research Mohali 140306, Punjab India
| | - Gurpreet Kaur
- Department of Chemistry and Centre of Advanced Studies in Chemistry Panjab University Chandigarh 160014 India
| | - Ganga Ram Chaudhary
- Department of Chemistry and Centre of Advanced Studies in Chemistry Panjab University Chandigarh 160014 India
| | - Aman Bhalla
- Department of Chemistry and Centre of Advanced Studies in Chemistry Panjab University Chandigarh 160014 India
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42
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Claus AR, Goulart TAC, Back DF, Zeni G. Potassium
tert
‐Butoxide‐Catalyzed Synthesis of
α
‐Methylene‐
β
‐Lactams from Propiolamides. European J Org Chem 2021. [DOI: 10.1002/ejoc.202100176] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Affiliation(s)
- Angelica R. Claus
- Laboratório de Síntese, Reatividade, Avaliação Farmacológica e Toxicológica de Organocalcogênios CCNE Universidade Federal de Santa Maria Santa Maria Rio Grande do Sul 97105-900 Brazil
| | - Tales A. C. Goulart
- Laboratório de Síntese, Reatividade, Avaliação Farmacológica e Toxicológica de Organocalcogênios CCNE Universidade Federal de Santa Maria Santa Maria Rio Grande do Sul 97105-900 Brazil
| | - Davi F. Back
- Laboratório de Materiais Inorgânicos CCNE Universidade Federal de Santa Maria Santa Maria Rio Grande do Sul 97105-900 Brazil
| | - Gilson Zeni
- Laboratório de Síntese, Reatividade, Avaliação Farmacológica e Toxicológica de Organocalcogênios CCNE Universidade Federal de Santa Maria Santa Maria Rio Grande do Sul 97105-900 Brazil
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43
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Porey A, Mondal BD, Guin J. Hydrogen-Bonding Assisted Catalytic Kinetic Resolution of Acyclic β-Hydroxy Amides. Angew Chem Int Ed Engl 2021; 60:8786-8791. [PMID: 33368918 DOI: 10.1002/anie.202015004] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/10/2020] [Revised: 12/21/2020] [Indexed: 01/07/2023]
Abstract
Enantioenriched acyclic α-substituted β-hydroxy amides are valuable compounds in chemical, material and medicinal sciences, but their enantioselective synthesis remains challenging. A catalytic kinetic resolution (KR) of such amides with selectivity factor(s) up to >200 is developed via enantioselective acylation of primary alcohol with N-heterocyclic carbene. An enhanced selectivity for the catalytic KR process is realized using cyclic tertiary amine as base additive. Diastereomeric transition state models for the process are proposed to rationalize the origin of enantioselectivity.
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Affiliation(s)
- Arka Porey
- School of Chemical Sciences, Indian Association for the Cultivation of Science, 2A & 2B Raja S. C. Mullick Road, Jadavpur, Kolkata, 700032, India
| | - Bhaskar Deb Mondal
- School of Chemical Sciences, Indian Association for the Cultivation of Science, 2A & 2B Raja S. C. Mullick Road, Jadavpur, Kolkata, 700032, India
| | - Joyram Guin
- School of Chemical Sciences, Indian Association for the Cultivation of Science, 2A & 2B Raja S. C. Mullick Road, Jadavpur, Kolkata, 700032, India
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44
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Porey A, Mondal BD, Guin J. Hydrogen‐Bonding Assisted Catalytic Kinetic Resolution of Acyclic β‐Hydroxy Amides. Angew Chem Int Ed Engl 2021. [DOI: 10.1002/ange.202015004] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Arka Porey
- School of Chemical Sciences Indian Association for the Cultivation of Science 2A & 2B Raja S. C. Mullick Road Jadavpur, Kolkata 700032 India
| | - Bhaskar Deb Mondal
- School of Chemical Sciences Indian Association for the Cultivation of Science 2A & 2B Raja S. C. Mullick Road Jadavpur, Kolkata 700032 India
| | - Joyram Guin
- School of Chemical Sciences Indian Association for the Cultivation of Science 2A & 2B Raja S. C. Mullick Road Jadavpur, Kolkata 700032 India
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45
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Wang J, Hou H, Hu Y, Lin J, Wu M, Zheng Z, Xu X. Visible-light-induced direct construction of amide bond from carboxylic acids with amines in aqueous solution. Tetrahedron Lett 2021. [DOI: 10.1016/j.tetlet.2020.152801] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
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46
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Amirsoleimani M, Khalilzadeh MA, Zareyee D. Preparation and catalytic evaluation of a palladium catalyst deposited over modified clinoptilolite (Pd@MCP) for chemoselective N-formylation and N-acylation of amines. J Mol Struct 2021. [DOI: 10.1016/j.molstruc.2020.129076] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
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47
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Datta M. Recent Advances of Indium(III) Chloride Catalyzed Reactions in Organic Synthesis. ChemistrySelect 2021. [DOI: 10.1002/slct.202003828] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Affiliation(s)
- Mrityunjoy Datta
- Department of Chemistry Sarojini Naidu College for Women 30 Jessore Road Kolkata 700028 India
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48
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49
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Thakur S, Das A, Das T. 1,3-Dipolar cycloaddition of nitrones: synthesis of multisubstituted, diverse range of heterocyclic compounds. NEW J CHEM 2021. [DOI: 10.1039/d1nj02023d] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
The 1,3-dipolar cycloaddition reaction of nitrone is one of the most important methods for the synthesis of different sizes of heterocycles which have enormous applications in natural products, biologically active molecules and pharmaceuticals.
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Affiliation(s)
- Seema Thakur
- Department of Chemistry
- NIT Jamshedpur
- Jamshedpur 831014
- India
| | - Arunima Das
- Department of Chemistry
- NIT Jamshedpur
- Jamshedpur 831014
- India
| | - Tapas Das
- Department of Chemistry
- NIT Jamshedpur
- Jamshedpur 831014
- India
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50
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Bhargava G, Mann MK, Naikoo RA. 3-Butadienyl- β-lactams: A useful synthon for functionalized heterocycles. SYNTHETIC COMMUN 2020. [DOI: 10.1080/00397911.2020.1813778] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
Affiliation(s)
- Gaurav Bhargava
- Department of Chemical Sciences, I. K. Gujral Punjab Technical University, Kapurthala, India
| | - Maninderjeet K. Mann
- Department of Chemical Sciences, I. K. Gujral Punjab Technical University, Kapurthala, India
| | - Rayees Ahmad Naikoo
- Department of Chemical Sciences, I. K. Gujral Punjab Technical University, Kapurthala, India
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