1
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Yan J, Retailleau P, Tran C, Hamze A. Leveraging in situ N-tosylhydrazones as diazo surrogates for efficient access to pyrazolo-[1,5- c]quinazolinone derivatives. Org Biomol Chem 2024. [PMID: 38946432 DOI: 10.1039/d4ob00950a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 07/02/2024]
Abstract
We developed a transition metal-free methodology for the construction of pyrazoloquinazolinone derivatives. The strategy involves a one-pot reaction wherein the N-tosylhydrazone and its corresponding diazo derivative are generated in situ, followed by an intramolecular 1,3-dipolar cycloaddition-ring expansion to provide the pyrazolo-[1,5-c]quinazolinone motif. This approach enables straightforward access to a diverse range of highly functionalized N-heterocyclic compounds in good yields (up to 92%).
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Affiliation(s)
- Jun Yan
- Department of Chemistry and Medicinal Chemistry, Université Paris-Saclay, CNRS, BioCIS, 91400 Orsay, France.
| | - Pascal Retailleau
- Department of Chemistry and Natural Products, ICSN, Université Paris-Saclay, UPR 2301, 91198, Gif-sur-Yvette, France
| | - Christine Tran
- Department of Chemistry and Medicinal Chemistry, Université Paris-Saclay, CNRS, BioCIS, 91400 Orsay, France.
| | - Abdallah Hamze
- Department of Chemistry and Medicinal Chemistry, Université Paris-Saclay, CNRS, BioCIS, 91400 Orsay, France.
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2
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Cheng Z, Chen J, Zhang Y, Shao Y, Sun J, Tang S. Decarboxylative Cyclization of Ethynyl Benzoxazinanones with Imidazolidines to Access 2,3-Indole-Fused 1,4-Diazocines. Org Lett 2024; 26:4863-4867. [PMID: 38833707 DOI: 10.1021/acs.orglett.4c01279] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/06/2024]
Abstract
2,3-Indole-fused 1,4-diazocines represent a new family of indole alkaloid compounds and are difficult to access by the reported protocols. Herein, we report a copper-catalyzed decarboxylative cyclization of cyclic propargylic carbamates with imidazolidines via sequential C-N/C-N/C-C bond formation to deliver a series of 2,3-indole-fused 1,4-diazocines, with a broad substrate scope and mild conditions.
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Affiliation(s)
- Zhangru Cheng
- Jiangsu Key Laboratory of Advanced Catalytic Materials & Technology, School of Petrochemical Engineering, Changzhou University, Changzhou 213164, China
| | - Jiadong Chen
- Jiangsu Key Laboratory of Advanced Catalytic Materials & Technology, School of Petrochemical Engineering, Changzhou University, Changzhou 213164, China
| | - Yulu Zhang
- Jiangsu Key Laboratory of Advanced Catalytic Materials & Technology, School of Petrochemical Engineering, Changzhou University, Changzhou 213164, China
| | - Ying Shao
- 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
| | - Shengbiao Tang
- Jiangsu Key Laboratory of Advanced Catalytic Materials & Technology, School of Petrochemical Engineering, Changzhou University, Changzhou 213164, China
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3
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Chu D, Zoll AJ, Ellman JA. Copper-Catalyzed Three-Component Synthesis of Highly Substituted Morpholines. Org Lett 2024; 26:4803-4807. [PMID: 38810982 PMCID: PMC11195447 DOI: 10.1021/acs.orglett.4c01634] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/31/2024]
Abstract
Unprotected, highly substituted morpholines were obtained through a copper-catalyzed three-component reaction utilizing amino alcohols, aldehydes, and diazomalonates. The transformation was effective for diversely substituted aldehydes and for a broad range of readily available vicinal amino alcohols, including those derived from glycine, α-substituted, and α,α-disubstituted amino acids. Epimerization of morpholines using light-mediated stereochemical editing was demonstrated, and the unprotected morpholine products were readily elaborated through efficient transformations.
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Affiliation(s)
- Duc Chu
- Department of Chemistry, Yale University, New Haven, Connecticut 04720, United States
| | - Adam J Zoll
- Department of Chemistry, Yale University, New Haven, Connecticut 04720, United States
| | - Jonathan A Ellman
- Department of Chemistry, Yale University, New Haven, Connecticut 04720, United States
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4
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Faizan M, Kumar R, Mazumder A, Salahuddin, Kukreti N, Kumar A, Chaitanya MVNL. The medicinal chemistry of piperazines: A review. Chem Biol Drug Des 2024; 103:e14537. [PMID: 38888058 DOI: 10.1111/cbdd.14537] [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: 01/31/2024] [Accepted: 04/15/2024] [Indexed: 06/20/2024]
Abstract
The versatile basic structure of piperazine allows for the development and production of newer bioactive molecules that can be used to treat a wide range of diseases. Piperazine derivatives are unique and can easily be modified for the desired pharmacological activity. The two opposing nitrogen atoms in a six-membered piperazine ring offer a large polar surface area, relative structural rigidity, and more acceptors and donors of hydrogen bonds. These properties frequently result in greater water solubility, oral bioavailability, and ADME characteristics, as well as improved target affinity and specificity. Various synthetic protocols have been reported for piperazine and its derivatives. In this review, we focused on recently published synthetic protocols for the synthesis of the piperazine and its derivatives. The structure-activity relationship concerning different biological activities of various piperazine-containing drugs has also been highlighted to provide a good understanding to researchers for future research on piperazines.
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Affiliation(s)
- Md Faizan
- Noida Institute of Engineering and Technology (Pharmacy Institute), Greater Noida, India
| | - Rajnish Kumar
- Noida Institute of Engineering and Technology (Pharmacy Institute), Greater Noida, India
| | - Avijit Mazumder
- Noida Institute of Engineering and Technology (Pharmacy Institute), Greater Noida, India
| | - Salahuddin
- Noida Institute of Engineering and Technology (Pharmacy Institute), Greater Noida, India
| | - Neelima Kukreti
- School of Pharmacy, Graphic Era Hill University, Dehradun, India
| | - Arvind Kumar
- Department of Biotechnology, Noida Institute of Engineering and Technology, Greater Noida, India
| | - M V N L Chaitanya
- School of Pharmaceutical Science, Lovely Professional University, Phagwara, India
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5
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Hanneman CM, Twilton J, Hall MN, Goodwin NC, Elward JM, Lynch-Colameta T, Stahl SS. Copper-Nitroxyl-Catalyzed α-Oxygenation of Cyclic Secondary Amines Including Application to Late-Stage Functionalization. J Am Chem Soc 2024; 146:14439-14444. [PMID: 38743876 DOI: 10.1021/jacs.4c04359] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/16/2024]
Abstract
Cyclic secondary amines are prominent subunits in pharmaceutical compounds. Methods for direct functionalization of N-unprotected/unsubstituted piperidines and related heterocycles have limited precedent despite their potential to impact medicinal chemistry and organic synthesis. Herein, we report a Cu/nitroxyl co-catalyzed method for direct conversion of cyclic secondary amines to the corresponding lactams via aerobic dehydrogenation and oxidative coupling with water. The mild reaction conditions tolerate diverse functional groups, enabling application to molecules that cover broad chemical space. The method is showcased in selective functionalization of building blocks and complex molecules, including late-stage functionalization of bromodomain inhibitors.
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Affiliation(s)
- Christopher M Hanneman
- Department of Chemistry, University of Wisconsin-Madison, 1101 University Avenue, Madison, Wisconsin 53706, United States
| | - Jack Twilton
- Department of Chemistry, University of Wisconsin-Madison, 1101 University Avenue, Madison, Wisconsin 53706, United States
| | - Melissa N Hall
- Department of Chemistry, University of Wisconsin-Madison, 1101 University Avenue, Madison, Wisconsin 53706, United States
| | - Nicole C Goodwin
- GSK, 1250 South Collegeville Road, Collegeville, Pennsylvania 19426, United States
| | - Jennifer M Elward
- GSK, 1250 South Collegeville Road, Collegeville, Pennsylvania 19426, United States
| | - Tessa Lynch-Colameta
- GSK, 1250 South Collegeville Road, Collegeville, Pennsylvania 19426, United States
| | - Shannon S Stahl
- Department of Chemistry, University of Wisconsin-Madison, 1101 University Avenue, Madison, Wisconsin 53706, United States
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6
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Götz J, Jackl MK, Jindakun C, Marziale AN, André J, Gosling DJ, Springer C, Palmieri M, Reck M, Luneau A, Brocklehurst CE, Bode JW. High-throughput synthesis provides data for predicting molecular properties and reaction success. SCIENCE ADVANCES 2023; 9:eadj2314. [PMID: 37889964 PMCID: PMC10610918 DOI: 10.1126/sciadv.adj2314] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/14/2023] [Accepted: 09/26/2023] [Indexed: 10/29/2023]
Abstract
The generation of attractive scaffolds for drug discovery efforts requires the expeditious synthesis of diverse analogues from readily available building blocks. This endeavor necessitates a trade-off between diversity and ease of access and is further complicated by uncertainty about the synthesizability and pharmacokinetic properties of the resulting compounds. Here, we document a platform that leverages photocatalytic N-heterocycle synthesis, high-throughput experimentation, automated purification, and physicochemical assays on 1152 discrete reactions. Together, the data generated allow rational predictions of the synthesizability of stereochemically diverse C-substituted N-saturated heterocycles with deep learning and reveal unexpected trends on the relationship between structure and properties. This study exemplifies how organic chemists can exploit state-of-the-art technologies to markedly increase throughput and confidence in the preparation of drug-like molecules.
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Affiliation(s)
- Julian Götz
- Laboratory of Organic Chemistry, Department of Chemistry and Applied Biosciences, ETH Zürich, 8093 Zürich, Switzerland
| | - Moritz K. Jackl
- Laboratory of Organic Chemistry, Department of Chemistry and Applied Biosciences, ETH Zürich, 8093 Zürich, Switzerland
| | - Chalupat Jindakun
- Laboratory of Organic Chemistry, Department of Chemistry and Applied Biosciences, ETH Zürich, 8093 Zürich, Switzerland
| | - Alexander N. Marziale
- Global Discovery Chemistry, Novartis Institutes for Biomedical Research, Novartis Pharma AG, 4056 Basel, Switzerland
| | - Jérôme André
- Global Discovery Chemistry, Novartis Institutes for Biomedical Research, Novartis Pharma AG, 4056 Basel, Switzerland
| | - Daniel J. Gosling
- Global Discovery Chemistry, Novartis Institutes for Biomedical Research, Novartis Pharma AG, 4056 Basel, Switzerland
| | - Clayton Springer
- Global Discovery Chemistry, Novartis Institutes for Biomedical Research, Novartis Pharma AG, Cambridge, MA 02139, USA
| | - Marco Palmieri
- Global Discovery Chemistry, Novartis Institutes for Biomedical Research, Novartis Pharma AG, 4056 Basel, Switzerland
| | - Marcel Reck
- Global Discovery Chemistry, Novartis Institutes for Biomedical Research, Novartis Pharma AG, 4056 Basel, Switzerland
| | - Alexandre Luneau
- Global Discovery Chemistry, Novartis Institutes for Biomedical Research, Novartis Pharma AG, 4056 Basel, Switzerland
| | - Cara E. Brocklehurst
- Global Discovery Chemistry, Novartis Institutes for Biomedical Research, Novartis Pharma AG, 4056 Basel, Switzerland
| | - Jeffrey W. Bode
- Laboratory of Organic Chemistry, Department of Chemistry and Applied Biosciences, ETH Zürich, 8093 Zürich, Switzerland
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7
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Lee S, Shin JE, Yoon R, Yoo H, Kim S. Annulation of O-silyl N, O-ketene acetals with alkynes for the synthesis of dihydropyridinones and its application in concise total synthesis of phenanthroindolizidine alkaloids. Front Chem 2023; 11:1267422. [PMID: 37810583 PMCID: PMC10551152 DOI: 10.3389/fchem.2023.1267422] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/26/2023] [Accepted: 08/28/2023] [Indexed: 10/10/2023] Open
Abstract
The formation of N-heterocycles with multiple substituents is important in organic synthesis. Herein, we report a novel method for the construction of functionalized dihydropyridinone rings through the annulation of an amide α-carbon with a tethered alkyne moiety. The reaction of the amide with the alkyne was achieved via O-silyl N,O-ketene acetal formation and silver-mediated addition. Furthermore, the developed method was applied for the total synthesis of phenanthroindolizidine and phenanthroquinolizidine alkaloids. By varying the coupling partners, a concise and collective total synthesis of these alkaloids was achieved.
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Affiliation(s)
- Seokwoo Lee
- College of Pharmacy, Seoul National University, Seoul, Republic of Korea
- College of Pharmacy, Chungnam National University, Daejeon, Republic of Korea
| | - Jae Eui Shin
- College of Pharmacy, Seoul National University, Seoul, Republic of Korea
| | - Ran Yoon
- College of Pharmacy, Seoul National University, Seoul, Republic of Korea
| | - Hanbin Yoo
- College of Pharmacy, Seoul National University, Seoul, Republic of Korea
| | - Sanghee Kim
- College of Pharmacy, Seoul National University, Seoul, Republic of Korea
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8
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Boutadghart T, Ghailane R. A molecular electron density theory study of asymmetric Diels-Alder [4 + 2] reaction's mechanism of furan with three substituted alkynes (5-R substituted-3-(3-(phenylsulfonyl)-propioloyl)-oxazolidin-2-one). J Mol Model 2023; 29:290. [PMID: 37612461 DOI: 10.1007/s00894-023-05665-7] [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: 01/17/2023] [Accepted: 07/13/2023] [Indexed: 08/25/2023]
Abstract
CONTEXT The [4 +2 ] cycloaddition reactions between furan and three substituted alkynes (5-R-substituted-3-(3-(phenylsulfonyl)-propioloyl)-oxazolidin-2-one) have been investigated using the MEDT approach. Reactivity indices, reaction pathways, and activation energies are calculated. In an investigation of conceptual DFT indices, furan acts as a nucleophile, while the three substituted alkynes (5-R-substituted-3-(3-(phenylsulfonyl)-propioloyl)-oxazolidin-2-one) function as electrophiles in this reaction. The cycloaddition is regioiselective, as demonstrated by the activation and reaction energies, in clear agreement with the experiment's results. Hetero Diels-Alder [4 + 2] cycloadditions occur following a non-concerted two stages one-step molecular mechanism. METHODS For the purpose of this study, all calculations were performed using the Gaussian 09 software. Optimization was achieved through Berny's computational gradient optimization method, employing the B3LYP functional and the 6-31G(d) basis set. Analysis of both local and global reactivity indices provided insights into the reactivity tendencies of the reactants, distinguishing between electrophilic and nucleophilic characteristics via Parr functions. Frequency calculations were employed to identify and characterize stationary points, with transition states indicated by a single imaginary frequency and positive values of all frequencies for reactants and product. The electron localization function (ELF) was investigated using the Multiwfn software within the context of topological analyses.
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Affiliation(s)
- Tarik Boutadghart
- Laboratory of Organic Chemistry, Catalysis and Environment, Unit of Theoretical Chemistry and Modeling, Faculty of Sciences, University of Ibn Tofail, Po Box 133, 14000, Kenitra, Morocco
| | - Rachida Ghailane
- Laboratory of Organic Chemistry, Catalysis and Environment, Unit of Theoretical Chemistry and Modeling, Faculty of Sciences, University of Ibn Tofail, Po Box 133, 14000, Kenitra, Morocco.
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9
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Sandvoß A, Wahl JM. From Cycloalkanols to Heterocycles via Nitrogen Insertion. Org Lett 2023; 25:5795-5799. [PMID: 37503963 DOI: 10.1021/acs.orglett.3c02048] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 07/29/2023]
Abstract
A variety of cyclic alcohols are found to undergo nitrogen insertion by subjection to O-mesitylsulfonylhydroxylamine. Critical to a successful process is the use of fluorinated alcoholic solvents, which ensures sufficient substrate activation to allow engagement with the ambiphilic aminating agent. This transition-metal-free nitrogen insertion provides access to a variety of medicinally relevant heterocycles such as pyrrolidenes, quinolines, and benzazepines (24 examples). Furthermore, combination with a photochemical Norrish-Yang-type cyclization allows an unprecedented access to indoles from ortho-substituted acetophenones.
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Affiliation(s)
- Alexander Sandvoß
- Department Chemie, Johannes Gutenberg-Universität, Duesbergweg 10-14, 55128 Mainz, Germany
| | - Johannes M Wahl
- Department Chemie, Johannes Gutenberg-Universität, Duesbergweg 10-14, 55128 Mainz, Germany
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10
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Peng Y, Oestreich M. B(C 6 F 5 ) 3 -Catalyzed Regioselective Ring Opening of Cyclic Amines with Hydrosilanes. Chemistry 2023; 29:e202203721. [PMID: 36448647 DOI: 10.1002/chem.202203721] [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: 11/29/2022] [Revised: 11/29/2022] [Accepted: 11/30/2022] [Indexed: 12/02/2022]
Abstract
Opening the ring of cyclic amines by regioselective fission of one of the carbon-nitrogen bonds greatly expands the repertoire of available nitrogen-containing skeletons. Unlike approaches starting from cyclic tertiary amines, methods that can directly open secondary amines are still scarce. The present work discloses an efficient reductive ring opening of either of these cyclic amines using PhSiH3 under B(C6 F5 )3 catalysis. By this, the direct transformation of unstrained cyclic amines into the corresponding acyclic amines is achieved in a simple one-pot operation. A stepwise mechanism proceeding through the intermediacy of silylammonium ions followed by reductive cleavage of a carbon-nitrogen bond was experimentally verified.
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Affiliation(s)
- Yi Peng
- Institut für Chemie, Technische Universität Berlin, Strasse des 17. Juni 115, 10623, Berlin, Germany
| | - Martin Oestreich
- Institut für Chemie, Technische Universität Berlin, Strasse des 17. Juni 115, 10623, Berlin, Germany
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11
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Ng TW, Tao R, See WWL, Poh SB, Zhao Y. Economical Access to Diverse Enantiopure Tetrahydropyridines and Piperidines Enabled by Catalytic Borrowing Hydrogen. Angew Chem Int Ed Engl 2023; 62:e202212528. [PMID: 36374610 DOI: 10.1002/anie.202212528] [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: 08/24/2022] [Indexed: 11/16/2022]
Abstract
We disclose herein a catalytic borrowing hydrogen method that enables an unprecedented, economical one-pot access to enantiopure tetrahydropyridines with minimal reagent use or waste formation. This method couples a few classes of readily available substrates with commercially available 1,3-amino alcohols, and delivers the valuable tetrahydropyridines of different substitution patterns free of N-protection. Such transformations are highly challenging to achieve, as multiple redox steps need to be realized in a cascade and numerous side reactions including a facile aromatization have to be overcome. Highly diastereoselective functionalizations of tetrahydropyridines also result in a general access to enantiopure di- and tri-substituted piperidines, which ranks the topmost frequent N-heterocycle in commercial drugs.
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Affiliation(s)
- Teng Wei Ng
- Department of Chemistry, National University of Singapore, 4 Science Drive 2, Singapore, 117544, Republic of Singapore
| | - Ran Tao
- Department of Chemistry, National University of Singapore, 4 Science Drive 2, Singapore, 117544, Republic of Singapore.,Integrative Sciences and Engineering Programme, NUS Graduate School, National University of Singapore, 21 Lower Kent Ridge Road, Singapore, 119077, Singapore
| | - Willy Wei Li See
- Department of Chemistry, National University of Singapore, 4 Science Drive 2, Singapore, 117544, Republic of Singapore
| | - Si Bei Poh
- Department of Chemistry, National University of Singapore, 4 Science Drive 2, Singapore, 117544, Republic of Singapore
| | - Yu Zhao
- Department of Chemistry, National University of Singapore, 4 Science Drive 2, Singapore, 117544, Republic of Singapore
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12
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Hamadi NB, Guesmi A, Algathami FK, Khezami L, Nouira W, El-Fattah WA. Synthesis and Molecular Docking of New 1,2,3-triazole Carbohydrates with COVID-19 Proteins. Curr Org Synth 2023; 20:238-245. [PMID: 35430994 DOI: 10.2174/1570179419666220414095602] [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: 01/31/2022] [Revised: 02/24/2022] [Accepted: 03/08/2022] [Indexed: 11/22/2022]
Abstract
AIMS We have established this paper to recommend a novel way for the preparation of carbohydrates encompassing a 1,2,3-triazole motif that was prepared using an efficient click chemistry synthesis. BACKGROUND The SARS-CoV-2 coronavirus epidemic continues to spread at a fast rate worldwide. The main protease (Mpro) is useful target for anti-COVID-19 agents. Triazoles are frequently found in many bioactive products, such as coronavirus inhibitors. OBJECTIVE Click reactions are facilitated via the activation of copper nanoparticles, different substrates have been tested using this adopted procedure given in all cases, in high yields and purity. Other interesting comparative docking analyses will be the focus of this article. Calculations of quantitative structure-activity relationships will be studied. METHODS Copper nanoparticles were produced by the reaction of cupric acetate monohydrate with oleylamine and oleic acid. To a solution, 5-(azidomethyl)-2,2,7,7-tetramethyltetrahydro-5Hbis([ 1,3]dioxolo)[4,5-b:4',5'-d]pyran 2 (200 mg, 0.72 mmol, 1 eq.) in toluene (15 mL) was added into a mixture of N-(prop-2-yn-1-yl)benzamide derivatives 1a-d (1.5 eq.) and copper nanoparticles (0.57 mg, 0.036 mmol, 0.05 eq.). RESULTS A novel series of 1,2,3-triazole carbohydrate skeletons were modeled and efficiently synthesized. Based on the observations, virtual screening using molecular docking was performed to identify novel compounds that can bind with the protein structures of COVID-19 (PDB ID: 6LU7 and 6W41). We believed that the 1,2,3-triazole carbohydrate derivatives could aid in COVID-19 drug discovery. CONCLUSION The formations of targeted triazoles were confirmed by different spectroscopic techniques (FT-IR, 1H NMR, 13C NMR, and CHN analyses). The docking scores of the newly synthesized triazole are attributed to the presence of hydrogen bonds together with many interactions between the ligands and the active amino acid residue of the receptor. The comparison of the interactions of the drugs, remdesivir and triazole, in the largest pocket of 6W41 and 6LU7 is also presented.
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Affiliation(s)
- Naoufel Ben Hamadi
- Laboratory of Heterocyclic Chemistry, Faculty of Science of Monastir, Natural Products and Reactivity (LR11ES39), University of Monastir, Avenue of Environment, 5019 Monastir, Tunisia
- Chemistry Department, College of Science, IMSIU (Imam Mohammad Ibn Saud Islamic University), P.O. Box 5701, Riyadh 11432, Saudi Arabia
| | - Ahlem Guesmi
- Laboratory of Heterocyclic Chemistry, Faculty of Science of Monastir, Natural Products and Reactivity (LR11ES39), University of Monastir, Avenue of Environment, 5019 Monastir, Tunisia
- Chemistry Department, College of Science, IMSIU (Imam Mohammad Ibn Saud Islamic University), P.O. Box 5701, Riyadh 11432, Saudi Arabia
- Textile Engineering Laboratory, Higher Institute of Technological Studies of Ksar Hellal, UM (University of Monastir), Ksar Hellal, Tunisia
| | - Faisal K Algathami
- Chemistry Department, College of Science, IMSIU (Imam Mohammad Ibn Saud Islamic University), P.O. Box 5701, Riyadh 11432, Saudi Arabia
| | - Lotfi Khezami
- Chemistry Department, College of Science, IMSIU (Imam Mohammad Ibn Saud Islamic University), P.O. Box 5701, Riyadh 11432, Saudi Arabia
| | - Wided Nouira
- Preparatory Institute for Engineering Studies of Kairouan, Nabeul, Tunisia
| | - Wesam Abd El-Fattah
- Chemistry Department, College of Science, IMSIU (Imam Mohammad Ibn Saud Islamic University), P.O. Box 5701, Riyadh 11432, Saudi Arabia
- Department of Chemistry, Faculty of Science, Port Said University, Port Said, Egypt
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13
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Brewster JT, Randall SD, Kowalski J, Cruz C, Shoemaker R, Tarlton E, Hinklin RJ. A Decarboxylative Cross-Coupling Platform To Access 2-Heteroaryl Azetidines: Building Blocks with Application in Medicinal Chemistry. Org Lett 2022; 24:9123-9129. [DOI: 10.1021/acs.orglett.2c03852] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Affiliation(s)
- James T. Brewster
- Medicinal Chemistry Division, Pfizer Boulder Research and Development, 3200 Walnut Street, Boulder, Colorado 80301, United States
| | - Samuel D. Randall
- Medicinal Chemistry Division, Pfizer Boulder Research and Development, 3200 Walnut Street, Boulder, Colorado 80301, United States
| | - John Kowalski
- Drug Metabolism & Pharmacokinetics, Pfizer Boulder Research and Development, 3200 Walnut Street, Boulder, Colorado 80301, United States
| | - Cole Cruz
- Medicinal Chemistry Synthesis Development, Pfizer Boulder Research and Development, 3200 Walnut Street, Boulder Colorado 80301, United States
| | - Richard Shoemaker
- Medicinal Chemistry Division, Pfizer Boulder Research and Development, 3200 Walnut Street, Boulder, Colorado 80301, United States
| | - Eugene Tarlton
- Medicinal Chemistry Synthesis Development, Pfizer Boulder Research and Development, 3200 Walnut Street, Boulder Colorado 80301, United States
| | - Ronald J. Hinklin
- Medicinal Chemistry Division, Pfizer Boulder Research and Development, 3200 Walnut Street, Boulder, Colorado 80301, United States
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14
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Shi ZZ, Yu T, Ma H, Chi LX, You S, Deng C. Recent advances in radical cascade cyclization of 1,n-enynes with trifluoromethylating agents. Tetrahedron 2022. [DOI: 10.1016/j.tet.2022.133216] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
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15
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(1RS,2RS,6RS)-2-(6-Amino-9H-purin-9-yl)-8-azaspiro[5.6]dodec-10-en-1-ol Dihydrochloride. MOLBANK 2022. [DOI: 10.3390/m1495] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
The title compound (1RS,2RS,6RS)-2-(6-Amino-9H-purin-9-yl)-8-azaspiro[5.6]dodec-10-en-1-ol dihydrochloride was synthesized for the first time in two steps, the first of which was a regioselectivity of epoxide ring-opening reaction under the action of adenine, yielding N-tert-butoxycarbonyl-((1RS,2RS,6RS)-2-(6-amino-9H-purin-9-yl)-8-azaspiro[5.6]dodec-10-en-1-ol. By treating the latter with a saturated methanolic solution of hydrogen chloride, it was possible to obtain ((1RS,2RS,6RS)-2-(6-Amino-9H-purin-9-yl)-8-azaspiro[5.6]dodec-10-en-1-ol dihydrochloride. The features of the molecular and crystal structure of ((1RS,2RS,6RS)-2-(6-Amino-9H-purin-9-yl)-8-azaspiro[5.6]dodec-10-en-1-ol dihydrochloride are discussed based on X-ray diffraction studies. The product overall yield was 40% out of two steps and after purification by column chromatography and recrystallization. The product was characterized by 1H-NMR, 13C-NMR, IR spectroscopy, HRMS and X-ray.
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16
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Shen Z, Vargas-Rivera MA, Rigby EL, Chen S, Ellman JA. Visible Light-Mediated, Diastereoselective Epimerization of Morpholines and Piperazines to More Stable Isomers. ACS Catal 2022; 12:12860-12868. [PMID: 36406894 PMCID: PMC9668057 DOI: 10.1021/acscatal.2c03672] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
We report a photocatalyzed epimerization of morpholines and piperazines that proceeds by reversible hydrogen atom transfer (HAT) and provides an efficient strategy for editing the stereochemical configurations of these saturated nitrogen heterocycles, which are prevalent in drugs. The more stable morpholine and piperazine isomers are obtained from the more synthetically accessible but less stable stereoisomers, and a broad scope is demonstrated in terms of substitution patterns and functional group compatibility. The observed distributions of diastereomers correlate well with the relative energies of the diastereomer pairs as determined by density functional theory (DFT) calculations. Mechanistic studies, including luminescence quenching, deuterium labeling reactions, and determination of reversibility support a thiyl radical mediated HAT pathway for the epimerization of morpholines. Investigation of piperazine epimerization established that the mechanism is more complex and led to the development of thiol free conditions for the highly stereoselective epimerization of N,N'-dialkyl piperazines for which a previously unrecognized radical chain HAT mechanism is proposed.
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Affiliation(s)
- Zican Shen
- Department of Chemistry, Yale University, New Haven, Connecticut 06520, United States
| | | | - Elizabeth L. Rigby
- Department of Chemistry and Biochemistry, Oberlin College, Oberlin, Ohio 44074, United States
| | - Shuming Chen
- Department of Chemistry and Biochemistry, Oberlin College, Oberlin, Ohio 44074, United States
| | - Jonathan A. Ellman
- Department of Chemistry, Yale University, New Haven, Connecticut 06520, United States
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17
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Wagener T, Pierau M, Heusler A, Glorius F. Synthesis of Saturated N-Heterocycles via a Catalytic Hydrogenation Cascade. Adv Synth Catal 2022; 364:3366-3371. [PMID: 36589139 PMCID: PMC9796080 DOI: 10.1002/adsc.202200601] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/03/2022] [Indexed: 01/04/2023]
Abstract
Saturated N-heterocycles are prominent motifs found in various natural products and pharmaceuticals. Despite the increasing interest in this class of compounds, the synthesis of saturated bicyclic azacycles requires tedious multi-step syntheses. Herein, we present a one-pot protocol for the synthesis of octahydroindoles, decahydroquinolines, and octahydroindolizines through a cascade reaction.
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Affiliation(s)
- Tobias Wagener
- Westfälische Wilhelms-Universität MünsterOrganisch-Chemisches InstitutCorrensstraße 4048149MünsterGermany
| | - Marco Pierau
- Westfälische Wilhelms-Universität MünsterOrganisch-Chemisches InstitutCorrensstraße 4048149MünsterGermany
| | - Arne Heusler
- Westfälische Wilhelms-Universität MünsterOrganisch-Chemisches InstitutCorrensstraße 4048149MünsterGermany
| | - Frank Glorius
- Westfälische Wilhelms-Universität MünsterOrganisch-Chemisches InstitutCorrensstraße 4048149MünsterGermany
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18
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Dong X, Shang M, Chen S, Zhang T, Jalani HB, Lu H. Carbonyl-Assisted Iridium-Catalyzed C-H Amination Using 2,2,2-Trichloroethoxycarbonyl Azide. J Org Chem 2022; 87:13990-14004. [PMID: 36190135 DOI: 10.1021/acs.joc.2c01636] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
The carbonyl-directed, mono C-H amination of arenes has been achieved using [Cp*Ir(III)Cl2]2 as the catalyst and 2,2,2-trichloroethoxycarbonyl (Troc) azide as an aminating reagent. The amination proceeds smoothly with a variety of arylcarbonyl compounds, including alkyl and vinyl arylketones, secondary and tertiary aryl amides, and acetyl indoles. The resulting ortho-TrocNH arylcarbonyl compounds are easily transformed to the corresponding free arylamines, aryl carbamates, or aryl ureas. Taking advantage of the electrophilic nature of both Troc and carbonyl groups in ortho-TrocNH arylcarbonyl compounds, the subsequent cyclization with dinucleophilic reagents has also been demonstrated. This provides an efficient strategy for the construction of aryl-fused N-heterocycles.
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Affiliation(s)
- Xunqing Dong
- Institute of Chemistry and BioMedical Sciences, Jiangsu Key Laboratory of Advanced Organic Materials, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210093, P. R. China
| | - Mingzhou Shang
- Institute of Chemistry and BioMedical Sciences, Jiangsu Key Laboratory of Advanced Organic Materials, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210093, P. R. China
| | - Shuguang Chen
- Key Laboratory of Functional Molecular Solids, Ministry of Education, College of Chemistry and Materials Science, Anhui Normal University, Wuhu 241000, P. R. China
| | - Tao Zhang
- Institute of Chemistry and BioMedical Sciences, Jiangsu Key Laboratory of Advanced Organic Materials, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210093, P. R. China
| | - Hitesh B Jalani
- Smart BioPharm, 310-Pilotplant, Incheon Techno-Park, 12-Gaetbeol-ro, Yeonsu-gu, Incheon 21999, Republic of Korea
| | - Hongjian Lu
- Institute of Chemistry and BioMedical Sciences, Jiangsu Key Laboratory of Advanced Organic Materials, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210093, P. R. China
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19
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Acar Çevik U, Celik I, Işık A, Gül ÜD, Bayazıt G, Bostancı HE, Özkay Y, Kaplancıklı ZA. Synthesis, and docking studies of novel tetrazole-S-alkyl derivatives as antimicrobial agents. PHOSPHORUS SULFUR 2022. [DOI: 10.1080/10426507.2022.2117812] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/14/2022]
Affiliation(s)
- Ulviye Acar Çevik
- Department of Pharmaceutical Chemistry, Faculty of Pharmacy, Anadolu University, Eskişehir, Turkey
| | - Ismail Celik
- Department of Pharmaceutical Chemistry, Faculty of Pharmacy, Erciyes University, Kayseri, Turkey
| | - Ayşen Işık
- Department of Biochemistry, Faculty of Science, Selçuk University, Konya, Turkey
| | - Ülküye Dudu Gül
- Department of Bioengineering, Faculty of Engineering, Bilecik Seyh Edebali University, Bilecik, Turkey
| | - Gizem Bayazıt
- Department of Biotechnology, Institute of Graduate Studies, Bilecik Seyh Edebali University, Bilecik, Turkey
| | - Hayrani Eren Bostancı
- Department of Biochemistry, Faculty of Pharmacy, Sivas Cumhuriyet University, Sivas, Turkey
| | - Yusuf Özkay
- Department of Pharmaceutical Chemistry, Faculty of Pharmacy, Anadolu University, Eskişehir, Turkey
| | - Zafer Asım Kaplancıklı
- Department of Pharmaceutical Chemistry, Faculty of Pharmacy, Anadolu University, Eskişehir, Turkey
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20
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Motiwala HF, Armaly AM, Cacioppo JG, Coombs TC, Koehn KRK, Norwood VM, Aubé J. HFIP in Organic Synthesis. Chem Rev 2022; 122:12544-12747. [PMID: 35848353 DOI: 10.1021/acs.chemrev.1c00749] [Citation(s) in RCA: 108] [Impact Index Per Article: 54.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
1,1,1,3,3,3-Hexafluoroisopropanol (HFIP) is a polar, strongly hydrogen bond-donating solvent that has found numerous uses in organic synthesis due to its ability to stabilize ionic species, transfer protons, and engage in a range of other intermolecular interactions. The use of this solvent has exponentially increased in the past decade and has become a solvent of choice in some areas, such as C-H functionalization chemistry. In this review, following a brief history of HFIP in organic synthesis and an overview of its physical properties, literature examples of organic reactions using HFIP as a solvent or an additive are presented, emphasizing the effect of solvent of each reaction.
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Affiliation(s)
- Hashim F Motiwala
- Divison of Chemical Biology and Medicinal Chemistry, UNC Eshelman School of Pharmacy, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina 27599 United States
| | - Ahlam M Armaly
- Divison of Chemical Biology and Medicinal Chemistry, UNC Eshelman School of Pharmacy, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina 27599 United States
| | - Jackson G Cacioppo
- Divison of Chemical Biology and Medicinal Chemistry, UNC Eshelman School of Pharmacy, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina 27599 United States
| | - Thomas C Coombs
- Department of Chemistry, University of North Carolina Wilmington, Wilmington, North Carolina 28403 United States
| | - Kimberly R K Koehn
- Divison of Chemical Biology and Medicinal Chemistry, UNC Eshelman School of Pharmacy, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina 27599 United States
| | - Verrill M Norwood
- Divison of Chemical Biology and Medicinal Chemistry, UNC Eshelman School of Pharmacy, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina 27599 United States
| | - Jeffrey Aubé
- Divison of Chemical Biology and Medicinal Chemistry, UNC Eshelman School of Pharmacy, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina 27599 United States
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21
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Ivanov DS, Zaitseva ER, Smirnov AY, Baleeva NS, Baranov MS. Synthesis of 5,11-dialkyl-5,6,11,12-tetrahydro-6,12-epoxydibenzo[b,f][1,5]diazocines from 2-alkylaminobenzaldehydes. Chem Heterocycl Compd (N Y) 2022. [DOI: 10.1007/s10593-022-03097-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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22
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Bifunctional sulfilimines enable synthesis of multiple N-heterocycles from alkenes. Nat Chem 2022; 14:898-904. [PMID: 35871706 PMCID: PMC9359915 DOI: 10.1038/s41557-022-00997-y] [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] [Received: 10/12/2021] [Accepted: 06/14/2022] [Indexed: 11/19/2022]
Abstract
Intramolecular cyclization of nitrogen-containing molecules onto pendant alkenes is an efficient strategy for the construction of N-heterocycles, which are of paramount importance in, for example, pharmaceuticals and materials. Similar intermolecular cyclization reactions, however, are scarcer for nitrogen building blocks, including N-centred radicals, and divergent and modular versions are not established. Here we report the use of sulfilimines as bifunctional N-radical precursors for cyclization reactions with alkenes to produce N-unprotected heterocycles in a single step through photoredox catalysis. Structurally diverse sulfilimines can be synthesized in a single step, and subsequently engage with alkenes to afford synthetically valuable five-, six- and seven-membered heterocycles. The broad and diverse scope is achievable by a radical-polar crossover annulation enabled by the bifunctional character of the reagents, which distinguishes itself from all other N-centred-radical-based reactions. The modular synthesis of the sulfilimines allows for larger structural diversity of N-heterocycle products than is currently achievable with other single cyclization methods. ![]()
Intermolecular cyclization reactions using nitrogen-containing building blocks are scarce. Now, bifunctional sulfilimines have been shown to enable the modular construction of a diverse range of N-heterocycles by reacting with alkenes in a single photocatalysed step. Both sulfilimines and alkenes are easily accessible, providing access to a wide range of N-heterocycles with different ring types, ring sizes and substituents on the skeleton.
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23
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Tambe SD, Ka CH, Hwang HS, Bae J, Iqbal N, Cho EJ. Nickel‐Catalyzed Enantioselective Synthesis of 2,3,4‐Trisubstituted 3‐Pyrrolines. Angew Chem Int Ed Engl 2022; 61:e202203494. [DOI: 10.1002/anie.202203494] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/07/2022] [Indexed: 11/11/2022]
Affiliation(s)
- Shrikant D. Tambe
- Department of Chemistry Chung-Ang University 84 Heukseok-ro Dongjak-gu, Seoul 06974 Republic of Korea
| | - Cheol Hyeon Ka
- Department of Chemistry Chung-Ang University 84 Heukseok-ro Dongjak-gu, Seoul 06974 Republic of Korea
| | - Ho Seong Hwang
- Department of Chemistry Chung-Ang University 84 Heukseok-ro Dongjak-gu, Seoul 06974 Republic of Korea
| | - Jaehan Bae
- Department of Chemistry Chung-Ang University 84 Heukseok-ro Dongjak-gu, Seoul 06974 Republic of Korea
| | - Naeem Iqbal
- Department of Chemistry University of York Heslington, York YO10 5DD UK
| | - Eun Jin Cho
- Department of Chemistry Chung-Ang University 84 Heukseok-ro Dongjak-gu, Seoul 06974 Republic of Korea
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24
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Choudhary D, Garg S, Kaur M, Sohal HS, Malhi DS, Kaur L, Verma M, Sharma A, Mutreja V. Advances in the Synthesis and Bio-Applications of Pyrazine Derivatives: A Review. Polycycl Aromat Compd 2022. [DOI: 10.1080/10406638.2022.2092873] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
Affiliation(s)
- Dimple Choudhary
- Medicinal and Natural Product Laboratory, Department of Chemistry, Chandigarh University, Mohali, India
| | - Sonali Garg
- Medicinal and Natural Product Laboratory, Department of Chemistry, Chandigarh University, Mohali, India
| | - Manvinder Kaur
- Medicinal and Natural Product Laboratory, Department of Chemistry, Chandigarh University, Mohali, India
| | - Harvinder Singh Sohal
- Medicinal and Natural Product Laboratory, Department of Chemistry, Chandigarh University, Mohali, India
| | - Dharambeer Singh Malhi
- Medicinal and Natural Product Laboratory, Department of Chemistry, Chandigarh University, Mohali, India
| | - Loveleen Kaur
- Medicinal and Natural Product Laboratory, Department of Chemistry, Chandigarh University, Mohali, India
| | - Meenakshi Verma
- Medicinal and Natural Product Laboratory, Department of Chemistry, Chandigarh University, Mohali, India
| | - Ajay Sharma
- Medicinal and Natural Product Laboratory, Department of Chemistry, Chandigarh University, Mohali, India
| | - Vishal Mutreja
- Medicinal and Natural Product Laboratory, Department of Chemistry, Chandigarh University, Mohali, India
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25
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Xu H, Wang GW. Solvent-Free Mechanosynthesis of Polysubstituted 1,2-Dihydroquinolines from Anilines and Alkyne Esters. J Org Chem 2022; 87:8480-8491. [PMID: 35731690 DOI: 10.1021/acs.joc.2c00605] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
A novel one-pot reaction of anilines with acetylenedicarboxylate diesters in the presence of boron trifluoride, iodine, and trifluoroacetic acid or methylsulfonic acid has been developed under solvent-free ball-milling conditions, affording a variety of polysubstituted 1,2-dihydroquinolines bearing multiple ester groups in moderate to excellent yields. The present protocol features mild reaction conditions, short reaction time, and feasibility of large-scale synthesis, providing a facile and practical alternative to 1,2-dihydroquinoline synthesis. Intriguingly, the generated 1,2-dihydroquinolines can be further transformed into quinoline derivatives.
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Affiliation(s)
- Hui Xu
- Hefei National Research Center for Physical Sciences at the Microscale and Department of Chemistry, University of Science and Technology of China, Hefei, Anhui 230026, P. R. China.,Anhui Province Key Laboratory of Functional Coordinated Complexes for Materials Chemistry Application, and School of Chemical and Environmental Engineering, Anhui Polytechnic University, Wuhu 241000, P. R. China
| | - Guan-Wu Wang
- Hefei National Research Center for Physical Sciences at the Microscale and Department of Chemistry, University of Science and Technology of China, Hefei, Anhui 230026, P. R. China
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26
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Prajapati RV, Prajapati VD, Purohit VB, Avalani JR, Kamani RD, Sapariya NH, Karad SC, Raval DK. Microwave‐Assisted Palladium‐catalyzed double C−H Activation: One‐pot Synthesis of Benzo[
a
]imidazo[5,1,2‐
cd
]indolizines from 2‐Phenylimidazo[1,2‐
a
]pyridines and 1,2‐Diiodobenzene. ChemistrySelect 2022. [DOI: 10.1002/slct.202201436] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Ronak V. Prajapati
- Department of Chemistry Sardar Patel University Vallabh Vidyanagar- 388120 Gujarat India
| | - Vaibhav D. Prajapati
- Department of Chemistry Sardar Patel University Vallabh Vidyanagar- 388120 Gujarat India
| | - Vishal B. Purohit
- Shri A. N. Patel P. G. Institute of Science & Research Anand 388001 Gujarat India
- Current Affiliation: International Centre for Research on Innovative Biobased Materials (ICRI-BioM)- International Research Agenda Lodz University of Technology Zeromskiego 116 90-924 Lodz Poland
| | - Jemin R. Avalani
- Shri A. N. Patel P. G. Institute of Science & Research Anand 388001 Gujarat India
| | - Ronak D. Kamani
- Department of Chemistry Sardar Patel University Vallabh Vidyanagar- 388120 Gujarat India
| | - Nirav H. Sapariya
- Natubhai V. Patel College of Pure and Applied Sciences CVM University, Vallabh Vidyanagar- 388120 Gujarat India
| | - Sharad C. Karad
- Department of Chemistry Sardar Patel University Vallabh Vidyanagar- 388120 Gujarat India
| | - Dipak K. Raval
- Department of Chemistry Sardar Patel University Vallabh Vidyanagar- 388120 Gujarat India
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27
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Kazerouni AM, Brandes DS, Davies CC, Cotter LF, Mayer JM, Chen S, Ellman JA. Visible Light-Mediated, Highly Diastereoselective Epimerization of Lactams from the Most Accessible to the More Stable Stereoisomer. ACS Catal 2022; 12:7798-7803. [DOI: 10.1021/acscatal.2c02232] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Amaan M. Kazerouni
- Department of Chemistry, Yale University, New Haven, Connecticut 06520, United States
| | - Daniel S. Brandes
- Department of Chemistry, Yale University, New Haven, Connecticut 06520, United States
| | - Cassondra C. Davies
- Department of Chemistry and Biochemistry, Oberlin College, Oberlin, Ohio 44074, United States
| | - Laura F. Cotter
- Department of Chemistry, Yale University, New Haven, Connecticut 06520, United States
| | - James M. Mayer
- Department of Chemistry, Yale University, New Haven, Connecticut 06520, United States
| | - Shuming Chen
- Department of Chemistry and Biochemistry, Oberlin College, Oberlin, Ohio 44074, United States
| | - Jonathan A. Ellman
- Department of Chemistry, Yale University, New Haven, Connecticut 06520, United States
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28
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Tambe SD, Ka CH, Hwang HS, Bae J, Iqbal N, Cho EJ. Nickel‐Catalyzed Enantioselective Synthesis of 2,3,4‐Trisubstituted 3‐Pyrrolines. Angew Chem Int Ed Engl 2022. [DOI: 10.1002/ange.202203494] [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)
- Shrikant D. Tambe
- Department of Chemistry Chung-Ang University 84 Heukseok-ro Dongjak-gu, Seoul 06974 Republic of Korea
| | - Cheol Hyeon Ka
- Department of Chemistry Chung-Ang University 84 Heukseok-ro Dongjak-gu, Seoul 06974 Republic of Korea
| | - Ho Seong Hwang
- Department of Chemistry Chung-Ang University 84 Heukseok-ro Dongjak-gu, Seoul 06974 Republic of Korea
| | - Jaehan Bae
- Department of Chemistry Chung-Ang University 84 Heukseok-ro Dongjak-gu, Seoul 06974 Republic of Korea
| | - Naeem Iqbal
- Department of Chemistry University of York Heslington, York YO10 5DD UK
| | - Eun Jin Cho
- Department of Chemistry Chung-Ang University 84 Heukseok-ro Dongjak-gu, Seoul 06974 Republic of Korea
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29
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Tran VH, Kim HK. Facile tin(II)-catalyzed synthesis of N-heterocycles from dicarboxylic acids and arylamines. Org Biomol Chem 2022; 20:2881-2888. [PMID: 35318478 DOI: 10.1039/d2ob00330a] [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 novel efficient transformation reaction of dicarboxylic acids into N-aryl-substituted azacycles is described. In this synthetic procedure, both catalytic SnCl2 and phenylsilane were used as crucial reagents for reaction of arylamines with dicarboxylic acids to produce the desired azacycles. Using this SnCl2-catalyzed synthetic method, various N-aryl-substituted azacycles were successfully prepared from arylamines with dicarboxylic acids in high yield. This practical synthetic method using catalytic SnCl2 can provide a useful approach for preparation of the desired azacycle products from many available dicarboxylic acid starting materials.
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Affiliation(s)
- Van Hieu Tran
- Department of Nuclear Medicine, Molecular Imaging & Therapeutic Medicine Research Center, Jeonbuk National University Medical School and Hospital, Jeonju, 54907, Republic of Korea. .,Research Institute of Clinical Medicine of Jeonbuk National University-Biomedical Research Institute of Jeonbuk National University Hospital, Jeonju, 54907, Republic of Korea
| | - Hee-Kwon Kim
- Department of Nuclear Medicine, Molecular Imaging & Therapeutic Medicine Research Center, Jeonbuk National University Medical School and Hospital, Jeonju, 54907, Republic of Korea. .,Research Institute of Clinical Medicine of Jeonbuk National University-Biomedical Research Institute of Jeonbuk National University Hospital, Jeonju, 54907, Republic of Korea
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30
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Ariyarathna JP, Alom NE, Roberts LP, Kaur N, Wu F, Li W. Lewis Acid-Catalyzed Halonium Generation for Morpholine Synthesis and Claisen Rearrangement. J Org Chem 2022; 87:2947-2958. [PMID: 35142512 DOI: 10.1021/acs.joc.1c02804] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
We disclose here practical strategies toward the synthesis of morpholines and Claisen rearrangement products based on the divergent reactivity of a common halonium intermediate. These reactions employ widely available alkenes in a Lewis acid-catalyzed halo-etherification process that can then transform them into the desired products with exceptional regioselectivity for both activated and unactivated olefins. Our mechanistic probe reveals an interesting regiochemical kinetic resolution process.
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Affiliation(s)
- Jeewani P Ariyarathna
- Department of Chemistry and Biochemistry, School of Green Chemistry and Engineering, The University of Toledo, 2801 West Bancroft Street, Toledo, Ohio 43606, United States
| | - Nur-E Alom
- Department of Chemistry and Biochemistry, School of Green Chemistry and Engineering, The University of Toledo, 2801 West Bancroft Street, Toledo, Ohio 43606, United States
| | - Leo P Roberts
- Department of Chemistry and Biochemistry, School of Green Chemistry and Engineering, The University of Toledo, 2801 West Bancroft Street, Toledo, Ohio 43606, United States
| | - Navdeep Kaur
- Department of Chemistry and Biochemistry, School of Green Chemistry and Engineering, The University of Toledo, 2801 West Bancroft Street, Toledo, Ohio 43606, United States
| | - Fan Wu
- Department of Chemistry and Biochemistry, School of Green Chemistry and Engineering, The University of Toledo, 2801 West Bancroft Street, Toledo, Ohio 43606, United States
| | - Wei Li
- Department of Chemistry and Biochemistry, School of Green Chemistry and Engineering, The University of Toledo, 2801 West Bancroft Street, Toledo, Ohio 43606, United States
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31
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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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32
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Iwumene NUN, Moseley DF, Pullin RDC, Willis MC. Diverse saturated heterocycles from a hydroacylation/conjugate addition cascade. Chem Sci 2022; 13:1504-1511. [PMID: 35222935 PMCID: PMC8809418 DOI: 10.1039/d1sc06900d] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/10/2021] [Accepted: 01/10/2022] [Indexed: 11/21/2022] Open
Abstract
Rhodium-catalyzed hydroacylation using alkynes substituted with pendant nucleophiles, delivers linear α,β-unsaturated enone intermediates with excellent regioselectivity. These adducts are used to construct a broad range of diversely substituted, saturated O-, N- and S-heterocycles in a one-pot process. Judicious choice of cyclisation conditions enabled isolation of O-heterocycles with high levels of diastereoselectivity. A variety of derivatisation reactions are also performed, generating functionalised hydroacylation products. This sequence serves as a general approach for the synthesis of fully saturated heterocycles.
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Affiliation(s)
- Ndidi U N Iwumene
- Department of Chemistry, University of Oxford, Chemistry Research Laboratory Mansfield Road Oxford OX1 3TA UK
| | - Daniel F Moseley
- Department of Chemistry, University of Oxford, Chemistry Research Laboratory Mansfield Road Oxford OX1 3TA UK
| | - Robert D C Pullin
- Vertex Pharmaceuticals (Europe) Ltd 86-88 Jubilee Avenue, Milton Park Abingdon OX14 4RW UK
| | - Michael C Willis
- Department of Chemistry, University of Oxford, Chemistry Research Laboratory Mansfield Road Oxford OX1 3TA UK
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33
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Feng T, Wang S, Liu Y, Liu S, Qiu Y. Electrochemical Desaturative β‐Acylation of Cyclic
N
‐Aryl Amines. Angew Chem Int Ed Engl 2022. [DOI: 10.1002/ange.202115178] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Tian Feng
- State Key Laboratory and Institute of Elemento-Organic Chemistry Frontiers Science Center for New Organic Matter College of Chemistry Nankai University 94 Weijin Road Tianjin 300071 China
| | - Siyi Wang
- State Key Laboratory and Institute of Elemento-Organic Chemistry Frontiers Science Center for New Organic Matter College of Chemistry Nankai University 94 Weijin Road Tianjin 300071 China
| | - Yin Liu
- State Key Laboratory and Institute of Elemento-Organic Chemistry Frontiers Science Center for New Organic Matter College of Chemistry Nankai University 94 Weijin Road Tianjin 300071 China
| | - Shouzhuo Liu
- State Key Laboratory and Institute of Elemento-Organic Chemistry Frontiers Science Center for New Organic Matter College of Chemistry Nankai University 94 Weijin Road Tianjin 300071 China
| | - Youai Qiu
- State Key Laboratory and Institute of Elemento-Organic Chemistry Frontiers Science Center for New Organic Matter College of Chemistry Nankai University 94 Weijin Road Tianjin 300071 China
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34
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Tomar R, Bhattacharya D, Arulananda Babu S. Direct lactamization of β‐arylated δ‐aminopentanoic acid carboxamides: En route to 4‐aryl‐ 2‐piperidones, piperidines, antituberculosis molecule Q203 (Telacebec) and its analogues. ASIAN J ORG CHEM 2022. [DOI: 10.1002/ajoc.202100736] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Radha Tomar
- Indian Institute of Science Education and Research Mohali Chemical Sciences INDIA
| | | | - Srinivasarao Arulananda Babu
- Indian Institute of Science Education and Research Mohali Department of Chemical Sciences Knowledge City, Sector 81, SAS Nagar,Mohali, Manauli P.O., 140306 Mohali INDIA
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35
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Dasgupta A, Guerzoni MG, Alotaibi N, van Ingen Y, Farshadfar K, Richards E, Ariafard A, Melen RL. Chemo- and regio-selective amidation of indoles with isocyanates using borane Lewis acids. Catal Sci Technol 2022. [DOI: 10.1039/d2cy01441f] [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 metal-free synthetic route using boranes has been developed for the amidation of indoles. A detailed mechanistic study was carried out to understand the reaction mechanism.
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Affiliation(s)
- Ayan Dasgupta
- Cardiff Catalysis Institute, School of Chemistry, Cardiff University, Main Building, Park Place, Cardiff, CF10 3AT, Cymru/Wales, UK
| | - Michael G. Guerzoni
- Cardiff Catalysis Institute, School of Chemistry, Cardiff University, Main Building, Park Place, Cardiff, CF10 3AT, Cymru/Wales, UK
| | - Nusaybah Alotaibi
- Cardiff Catalysis Institute, School of Chemistry, Cardiff University, Main Building, Park Place, Cardiff, CF10 3AT, Cymru/Wales, UK
| | - Yara van Ingen
- Cardiff Catalysis Institute, School of Chemistry, Cardiff University, Main Building, Park Place, Cardiff, CF10 3AT, Cymru/Wales, UK
| | - Kaveh Farshadfar
- Department of Chemistry, Islamic Azad University, Central Tehran Branch, Poonak, Tehran, 1469669191, Iran
- Research Group of Computational Chemistry, Department of Chemistry and Materials Science, Aalto University, FI-00076 Aalto, Finland
| | - Emma Richards
- Cardiff Catalysis Institute, School of Chemistry, Cardiff University, Main Building, Park Place, Cardiff, CF10 3AT, Cymru/Wales, UK
| | - Alireza Ariafard
- School of Physical Sciences, University of Tasmania, Private Bag 75, Hobart, Tasmania 7001, Australia
| | - Rebecca L. Melen
- Cardiff Catalysis Institute, School of Chemistry, Cardiff University, Main Building, Park Place, Cardiff, CF10 3AT, Cymru/Wales, UK
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36
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Choi SM, Kim KD, Park JU, Xuan Z, Kim JH. Pd-catalyzed [3 + 2] cycloaddition of cyclic ketimines and trimethylenemethanes toward N-fused pyrrolidines bearing a quaternary carbon. RSC Adv 2022; 12:785-789. [PMID: 35425099 PMCID: PMC8978666 DOI: 10.1039/d1ra08579d] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/23/2021] [Accepted: 12/17/2021] [Indexed: 12/14/2022] Open
Abstract
A Pd-catalyzed [3 + 2] cycloaddition of N-sulfonyl cyclic ketimines and trimethylenemethanes (TMM) was developed that afforded N-fused pyrrolidines bearing a quaternary carbon. Under mild reaction conditions, structurally diverse N-sulfonyl cyclic imines, including sulfamate-fused aldimines, aryl- or styryl-substituted sulfamate-derived ketimines, and N-sulfonyl cyclic ketimines, were tolerated as reactants, affording N-fused pyrrolidines with high efficiency. A facile route to access N-fused pyrrolidines bearing a quaternary carbon from N-sulfonyl ketimines and commercially available trimethylenemethanes has been developed.![]()
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Affiliation(s)
- Seoung-Mi Choi
- Department of Chemistry (BK21 Four), Research Institute of Natural Science, Gyeongsang National University, 52828, Jinju, Korea
| | - Kyeong Do Kim
- Department of Chemistry (BK21 Four), Research Institute of Natural Science, Gyeongsang National University, 52828, Jinju, Korea
| | - Jong-Un Park
- Department of Chemistry (BK21 Four), Research Institute of Natural Science, Gyeongsang National University, 52828, Jinju, Korea
| | - Zi Xuan
- Department of Chemistry (BK21 Four), Research Institute of Natural Science, Gyeongsang National University, 52828, Jinju, Korea
| | - Ju Hyun Kim
- Department of Chemistry (BK21 Four), Research Institute of Natural Science, Gyeongsang National University, 52828, Jinju, Korea
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37
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Renzi P, Azzi E, Bessone E, Ghigo G, Parisotto S, Pellegrino F, Deagostino A. Blue light enhanced Heck arylation at room temperature applied to allenes. Org Chem Front 2022. [DOI: 10.1039/d1qo01631h] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
Abstract
A blue light enhanced synthesis of 2-vinyl pirrolidines and piperidines through a domino Heck arylation–cyclisation applied to allenyl amines is described. Essential is the role of the light in the aryl migration in the carbo-palladation step.
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Affiliation(s)
- Polyssena Renzi
- Department of Chemistry, University of Torino, Via Pietro Giuria, 7, 10125 Torino, Italy
| | - Emanuele Azzi
- Department of Chemistry, University of Torino, Via Pietro Giuria, 7, 10125 Torino, Italy
| | - Enrico Bessone
- Department of Chemistry, University of Torino, Via Pietro Giuria, 7, 10125 Torino, Italy
| | - Giovanni Ghigo
- Department of Chemistry, University of Torino, Via Pietro Giuria, 7, 10125 Torino, Italy
| | - Stefano Parisotto
- Department of Chemistry, University of Torino, Via Pietro Giuria, 7, 10125 Torino, Italy
| | - Francesco Pellegrino
- Department of Chemistry, University of Torino, Via Pietro Giuria, 7, 10125 Torino, Italy
| | - Annamaria Deagostino
- Department of Chemistry, University of Torino, Via Pietro Giuria, 7, 10125 Torino, Italy
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38
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Garcia J, Eichwald J, Zesiger J, Beng TK. Leveraging the 1,3-azadiene-anhydride reaction for the synthesis of functionalized piperidines bearing up to five contiguous stereocenters. RSC Adv 2021; 12:309-318. [PMID: 35424477 PMCID: PMC8978715 DOI: 10.1039/d1ra07390g] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/04/2021] [Accepted: 12/10/2021] [Indexed: 12/25/2022] Open
Abstract
A modular and scalable strategy, which remodels 3-methylglutaric anhydride to 2-oxopiperidines bearing at least three contiguous stereocenters is described. The approach relies on the chemoselective and stereocontrolled annulation of 1,3-azadienes with the anhydride component. The resulting acid-tethered allylic 2-oxopiperidines are then engaged in several selective fragment growth processes, including catalytic denitrative alkenylation, halolactonization, and Vilsmeier–Haack functionalization. A modular and scalable strategy, which converts 3-methylglutaric anhydride to 2-oxopiperidines bearing at least three contiguous stereocenters is described.![]()
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Affiliation(s)
- Jorge Garcia
- Department of Chemistry, Central Washington University Ellensburg WA 98926 USA
| | - Jane Eichwald
- Department of Chemistry, Central Washington University Ellensburg WA 98926 USA
| | - Jayme Zesiger
- Department of Chemistry, Central Washington University Ellensburg WA 98926 USA
| | - Timothy K Beng
- Department of Chemistry, Central Washington University Ellensburg WA 98926 USA
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39
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Jaiswal V, Godara M, Das D, Gandon V, Saha J. Leveraging the Domino Skeletal Expansion of Thia-/Selenazolidinones via Nitrogen-Atom Transfer in Hexafluoroisopropanol: Room Temperature Access to Six-Membered S/Se,N-Heterocycles. J Org Chem 2021; 87:613-627. [PMID: 34904438 DOI: 10.1021/acs.joc.1c02621] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
Abstract
Herein, a highly regioselective domino skeletal-expansion process that transforms 2-aminothiazolidinone into six-membered S,N-heterocycle is developed with the aid of TMS-azide in hexafluoroisopropanol (HFIP) at ambient temperature. Functioning of the C2 tertiary amine as latent reactive group on thiazolidinone moiety was the key to this development, which allowed relay substitution with azide and imparted subsequent ring-expansion under metal/acid free-conditions. The reaction also underscored an intermolecular nitrogen-atom transfer process from TMS-azide leading to final products, where any intermediary azidothiazolidinone was absent. The strategy was extendable to analogous synthesis of Se,N-heterocycles, and furthermore, late-stage drug-modification and follow-up transformations were also performed. Density functional theory calculations and control experiments provided important mechanistic insights and highlighted potential roles of HFIP in the transformation.
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Affiliation(s)
- Vandana Jaiswal
- Division of Molecular Synthesis & Drug Discovery, Centre of Biomedical Research (CBMR), SGPGIMS Campus, Raebareli Road, Lucknow, Uttar Pradesh 226014, India
| | - Mangilal Godara
- Division of Molecular Synthesis & Drug Discovery, Centre of Biomedical Research (CBMR), SGPGIMS Campus, Raebareli Road, Lucknow, Uttar Pradesh 226014, India
| | - Dinabandhu Das
- School of Physical Sciences, Jawaharlal Nehru University, New Delhi-110067, India
| | - Vincent Gandon
- Institut de Chimie Moléculaire et des Matériaux d'Orsay (ICMMO), CNRS UMR 8182, Université Paris-Saclay, Bâtiment 420, 91405 Orsay cedex, France.,Laboratoire de Chimie Moléculaire (LCM), CNRS UMR 9168, Ecole Polytechnique, Institut Polytechnique de Paris, route de Saclay, 91128 Palaiseau cedex, France
| | - Jaideep Saha
- Division of Molecular Synthesis & Drug Discovery, Centre of Biomedical Research (CBMR), SGPGIMS Campus, Raebareli Road, Lucknow, Uttar Pradesh 226014, India
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40
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Feng T, Wang S, Liu Y, Liu S, Qiu Y. Electrochemical Desaturative β-Acylation of Cyclic N-Aryl Amines. Angew Chem Int Ed Engl 2021; 61:e202115178. [PMID: 34878215 DOI: 10.1002/anie.202115178] [Citation(s) in RCA: 32] [Impact Index Per Article: 10.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/08/2021] [Indexed: 12/15/2022]
Abstract
Herein, we disclose a straightforward, robust, and simple route to access β-substituted desaturated cyclic amines via an electrochemically driven desaturative β-functionalization of cyclic amines. This transformation is based on multiple single-electron oxidation processes using catalytic amounts of ferrocene. The reaction proceeds in the absence of stoichiometric amounts of electrolyte under mild conditions, affording the desired products with high chemo- and regioselectivity. The reaction was tolerant of a broad range of substrates and also enables late-stage β-C(sp3 )-H acylation of potentially valuable products. Preliminary mechanistic studies using cyclic voltammetry reveal the key role of ferrocene as a redox mediator in the reaction.
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Affiliation(s)
- Tian Feng
- State Key Laboratory and Institute of Elemento-Organic Chemistry, Frontiers Science Center for New Organic Matter, College of Chemistry, Nankai University, 94 Weijin Road, Tianjin, 300071, China
| | - Siyi Wang
- State Key Laboratory and Institute of Elemento-Organic Chemistry, Frontiers Science Center for New Organic Matter, College of Chemistry, Nankai University, 94 Weijin Road, Tianjin, 300071, China
| | - Yin Liu
- State Key Laboratory and Institute of Elemento-Organic Chemistry, Frontiers Science Center for New Organic Matter, College of Chemistry, Nankai University, 94 Weijin Road, Tianjin, 300071, China
| | - Shouzhuo Liu
- State Key Laboratory and Institute of Elemento-Organic Chemistry, Frontiers Science Center for New Organic Matter, College of Chemistry, Nankai University, 94 Weijin Road, Tianjin, 300071, China
| | - Youai Qiu
- State Key Laboratory and Institute of Elemento-Organic Chemistry, Frontiers Science Center for New Organic Matter, College of Chemistry, Nankai University, 94 Weijin Road, Tianjin, 300071, China
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41
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Hidasová D, Pohl R, Císařová I, Jahn U. A Diastereoselective Catalytic Approach to Pentasubstituted Pyrrolidines by Tandem Anionic‐Radical Cross‐Over Reactions. Adv Synth Catal 2021. [DOI: 10.1002/adsc.202101172] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Denisa Hidasová
- Institute of Organic Chemistry and Biochemistry Czech Academy of Sciences Flemingovo náměstí 2 166 10 Prague 6 Czech Republic
| | - Radek Pohl
- Institute of Organic Chemistry and Biochemistry Czech Academy of Sciences Flemingovo náměstí 2 166 10 Prague 6 Czech Republic
| | - Ivana Císařová
- Department of Inorganic Chemistry, Faculty of Science Charles University Hlavova 2030/8 128 43 Prague 2 Czech Republic
| | - Ullrich Jahn
- Institute of Organic Chemistry and Biochemistry Czech Academy of Sciences Flemingovo náměstí 2 166 10 Prague 6 Czech Republic
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42
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Kiss L, Nonn M, Ouchakour L, Remete AM. Application of Oxidative Ring Opening/Ring Closing by Reductive Amination Protocol for the Stereocontrolled Synthesis of Functionalized Azaheterocycles. Synlett 2021. [DOI: 10.1055/s-0040-1719850] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
AbstractThe current Account gives an insight into the synthesis of some N-heterocyclic β-amino acid derivatives and various functionalized saturated azaheterocycles accessed from substituted cycloalkenes via ring C=C bond oxidative cleavage followed by ring closing across double reductive amination. The ring-cleavage protocol has been accomplished according to two common approaches: a) Os-catalyzed dihydroxylation/NaIO4 vicinal diol oxidation and b) ozonolysis. A comparative study on these methodologies has been investigated. Due to the everincreasing relevance of organofluorine chemistry in drug research as well as of the high biological potential of β-amino acid derivatives several illustrative examples to the access of various fluorine-containing piperidine or azepane β-amino acid derivatives are also presented in the current Account.1 Introduction2 Olefin-Bond Transformation by Oxidative Ring Cleavage3 Synthesis of Saturated Azaheterocycles via Oxidative Ring-Opening/Ring-Closing Double Reductive Amination3.1 Importance of Fluorine-Containing Azaheterocycles in Pharmaceutical Research3.2 Synthesis of Azaheterocyclic Amino Acid Derivatives with a Piperidine or Azepane Framework through Oxidative Ring Opening/Reductive Amination3.2.1 Synthesis of Piperidine β-Amino Esters3.2.2 Synthesis of Azepane β-Amino Esters3.2.3 Synthesis of Fluorine-Containing Piperidine γ-Amino Esters3.3 Synthesis of Tetrahydroisoquinoline Derivatives through Oxidative Ring Opening/Reductive Amination Protocol3.4 Synthesis of Functionalized Benzazepines through Reductive Amination3.4.1 Synthesis of Benzo[c]azepines3.4.2 Synthesis of Benzo[d]azepines3.5 Synthesis of Various N-Heterocycles via Ozonolysis/Reductive Amination3.5.1 Synthesis of Compounds with an Azepane Ring3.5.2 Synthesis of Piperidine β-Amino Acids and Piperidine-Fused β-Lactams3.5.3 Synthesis of γ-Lactams with a Piperidine Ring3.5.4 Synthesis of other N-Heterocycles4 Summary and Outlook5 List of Abbreviations
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Affiliation(s)
- Loránd Kiss
- Institute of Organic Chemistry, Research Centre for Natural Sciences
| | - Melinda Nonn
- Institute of Pharmaceutical Chemistry, University of Szeged
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43
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Qin H, Cai W, Wang S, Guo T, Li G, Lu H. N-Atom Deletion in Nitrogen Heterocycles. Angew Chem Int Ed Engl 2021; 60:20678-20683. [PMID: 34227207 DOI: 10.1002/anie.202107356] [Citation(s) in RCA: 30] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/02/2021] [Revised: 07/02/2021] [Indexed: 11/10/2022]
Abstract
Excising the nitrogen in secondary amines, and coupling the two residual fragments is a skeletal editing strategy that can be used to construct molecules with new skeletons, but which has been largely unexplored. Here we report a versatile method of N-atom excision from N-heterocycles. The process uses readily available N-heterocycles as substrates, and proceeds by N-sulfonylazidonation followed by the rearrangement of sulfamoyl azide intermediates, providing various cyclic products. Examples are provided of deletion of nitrogen from natural products, synthesis of chiral O-heterocycles from commercially available chiral β-amino alcohols, formal inert C-H functionalization through a sequence of N-directed C-H functionalization and N-atom deletion reactions in which the N-atom can serve as a traceless directing group.
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Affiliation(s)
- Haitao Qin
- Institute of Chemistry and BioMedical Sciences, Jiangsu Key Laboratory of Advanced Organic Materials, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing, 210093, China
| | - Wangshui Cai
- Institute of Chemistry and BioMedical Sciences, Jiangsu Key Laboratory of Advanced Organic Materials, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing, 210093, China
| | - Shuang Wang
- Institute of Chemistry and BioMedical Sciences, Jiangsu Key Laboratory of Advanced Organic Materials, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing, 210093, China
| | - Ting Guo
- Institute of Chemistry and BioMedical Sciences, Jiangsu Key Laboratory of Advanced Organic Materials, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing, 210093, China
| | - Guigen Li
- Institute of Chemistry and BioMedical Sciences, Jiangsu Key Laboratory of Advanced Organic Materials, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing, 210093, China.,Department of Chemistry and Biochemistry, Texas Tech University, Lubbock, TX, 79409-1061, USA
| | - Hongjian Lu
- Institute of Chemistry and BioMedical Sciences, Jiangsu Key Laboratory of Advanced Organic Materials, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing, 210093, China
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44
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Qin H, Cai W, Wang S, Guo T, Li G, Lu H. N‐Atom Deletion in Nitrogen Heterocycles. Angew Chem Int Ed Engl 2021. [DOI: 10.1002/ange.202107356] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Affiliation(s)
- Haitao Qin
- Institute of Chemistry and BioMedical Sciences Jiangsu Key Laboratory of Advanced Organic Materials School of Chemistry and Chemical Engineering Nanjing University Nanjing 210093 China
| | - Wangshui Cai
- Institute of Chemistry and BioMedical Sciences Jiangsu Key Laboratory of Advanced Organic Materials School of Chemistry and Chemical Engineering Nanjing University Nanjing 210093 China
| | - Shuang Wang
- Institute of Chemistry and BioMedical Sciences Jiangsu Key Laboratory of Advanced Organic Materials School of Chemistry and Chemical Engineering Nanjing University Nanjing 210093 China
| | - Ting Guo
- Institute of Chemistry and BioMedical Sciences Jiangsu Key Laboratory of Advanced Organic Materials School of Chemistry and Chemical Engineering Nanjing University Nanjing 210093 China
| | - Guigen Li
- Institute of Chemistry and BioMedical Sciences Jiangsu Key Laboratory of Advanced Organic Materials School of Chemistry and Chemical Engineering Nanjing University Nanjing 210093 China
- Department of Chemistry and Biochemistry Texas Tech University Lubbock TX 79409-1061 USA
| | - Hongjian Lu
- Institute of Chemistry and BioMedical Sciences Jiangsu Key Laboratory of Advanced Organic Materials School of Chemistry and Chemical Engineering Nanjing University Nanjing 210093 China
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45
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Valles DA, Dutta S, Paul A, Abboud KA, Ghiviriga I, Seidel D. α,α'-C-H Bond Difunctionalization of Unprotected Alicyclic Amines. Org Lett 2021; 23:6367-6371. [PMID: 34323490 PMCID: PMC8609614 DOI: 10.1021/acs.orglett.1c02187] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
A simple one-pot procedure enables the sequential, regioselective, and diastereoselective introduction of the same or two different substituents to the α- and α'-positions of unprotected azacycles. Aryl, alkyl, and alkenyl substituents are introduced via their corresponding organolithium compounds. The scope of this transformation includes pyrrolidines, piperidines, azepanes, and piperazines.
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Affiliation(s)
- Daniel A. Valles
- Center for Heterocyclic Compounds, Department of Chemistry, University of Florida, Gainesville, Florida 32611, United States
| | - Subhradeep Dutta
- Center for Heterocyclic Compounds, Department of Chemistry, University of Florida, Gainesville, Florida 32611, United States
| | - Anirudra Paul
- Center for Heterocyclic Compounds, Department of Chemistry, University of Florida, Gainesville, Florida 32611, United States
| | - Khalil A. Abboud
- Center for X-ray Crystallography, Department of Chemistry, University of Florida, Gainesville, Florida 32611, United States
| | - Ion Ghiviriga
- Center for NMR Spectroscopy, Department of Chemistry, University of Florida, Gainesville, Florida 32611, United States
| | - Daniel Seidel
- Center for Heterocyclic Compounds, Department of Chemistry, University of Florida, Gainesville, Florida 32611, United States
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46
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Yamazaki K, Gabriel P, Di Carmine G, Pedroni J, Farizyan M, Hamlin TA, Dixon DJ. General Pyrrolidine Synthesis via Iridium-Catalyzed Reductive Azomethine Ylide Generation from Tertiary Amides and Lactams. ACS Catal 2021; 11:7489-7497. [PMID: 34306810 PMCID: PMC8291578 DOI: 10.1021/acscatal.1c01589] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/07/2021] [Revised: 05/19/2021] [Indexed: 02/06/2023]
Abstract
![]()
An
iridium-catalyzed reductive generation of both stabilized and
unstabilized azomethine ylides and their application to functionalized
pyrrolidine synthesis via [3 + 2] dipolar cycloaddition reactions
is described. Proceeding under mild reaction conditions from both
amide and lactam precursors possessing a suitably positioned electron-withdrawing
or a trimethylsilyl group, using 1 mol% Vaska’s complex [IrCl(CO)(PPh3)2] and tetramethyldisiloxane (TMDS) as a terminal
reductant, a broad range of (un)stabilized azomethine ylides were
accessible. Subsequent regio- and diastereoselective, inter- and intramolecular
dipolar cycloaddition reactions with variously substituted electron-deficient
alkenes enabled ready and efficient access to structurally complex
pyrrolidine architectures. Density functional theory (DFT) calculations
of the dipolar cycloaddition reactions uncovered an intimate balance
between asynchronicity and interaction energies of transition structures,
which ultimately control the unusual selectivities observed in certain
cases.
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Affiliation(s)
- Ken Yamazaki
- Department of Chemistry, Chemistry Research Laboratory, University of Oxford, 12 Mansfield Road, Oxford OX1 3TA, United Kingdom
- Department of Theoretical Chemistry, Amsterdam Institute of Molecular and Life Sciences (AIMMS), and Amsterdam Center for Multiscale Modeling (ACMM), Vrije Universiteit Amsterdam, De Boelelaan 1083, 1081 HV Amsterdam, The Netherlands
| | - Pablo Gabriel
- Department of Chemistry, Chemistry Research Laboratory, University of Oxford, 12 Mansfield Road, Oxford OX1 3TA, United Kingdom
| | - Graziano Di Carmine
- Department of Chemistry, Chemistry Research Laboratory, University of Oxford, 12 Mansfield Road, Oxford OX1 3TA, United Kingdom
| | - Julia Pedroni
- Department of Chemistry, Chemistry Research Laboratory, University of Oxford, 12 Mansfield Road, Oxford OX1 3TA, United Kingdom
| | - Mirxan Farizyan
- Department of Chemistry, Chemistry Research Laboratory, University of Oxford, 12 Mansfield Road, Oxford OX1 3TA, United Kingdom
| | - Trevor A. Hamlin
- Department of Theoretical Chemistry, Amsterdam Institute of Molecular and Life Sciences (AIMMS), and Amsterdam Center for Multiscale Modeling (ACMM), Vrije Universiteit Amsterdam, De Boelelaan 1083, 1081 HV Amsterdam, The Netherlands
| | - Darren J. Dixon
- Department of Chemistry, Chemistry Research Laboratory, University of Oxford, 12 Mansfield Road, Oxford OX1 3TA, United Kingdom
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Chen W, Seidel D. α-C-H/N-H Annulation of Alicyclic Amines via Transient Imines: Preparation of Polycyclic Lactams. Org Lett 2021; 23:3729-3734. [PMID: 33881883 PMCID: PMC8175037 DOI: 10.1021/acs.orglett.1c01125] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
Polycyclic lactams are prepared in a single operation from o-toluamides and cyclic amines in a process that involves transient cyclic imines, species that are conveniently obtained in situ from the corresponding lithium amides and simple ketone oxidants. Imines thus generated, such as 1-pyrroline and 1-piperideine, engage lithiated o-toluamides in a facile annulation process. Undesired side reactions such as imine deprotonation and o-toluamide dimerization are suppressed through the judicious choice of reaction conditions.
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Affiliation(s)
- Weijie Chen
- Center for Heterocyclic Compounds, Department of Chemistry, University of Florida, Gainesville, Florida, 32611, United States
| | - Daniel Seidel
- Center for Heterocyclic Compounds, Department of Chemistry, University of Florida, Gainesville, Florida, 32611, United States
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Jalageri MD, Nagaraja A, Puttaiahgowda YM. Piperazine based antimicrobial polymers: a review. RSC Adv 2021; 11:15213-15230. [PMID: 35424074 PMCID: PMC8698587 DOI: 10.1039/d1ra00341k] [Citation(s) in RCA: 17] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/14/2021] [Accepted: 04/02/2021] [Indexed: 11/21/2022] Open
Abstract
Microbial infections are a life threatening concern in several areas, which include the biomedical sector, healthcare products, water purification systems, and food packaging. Polymers with low molecular weight bioactive agents or disinfectants help the scientific community to reduce the lethality rate caused by pathogenic microbes. Antimicrobial polymeric approach is one of the advanced approaches made by researchers in concern with the problems associated with small molecules that restrict their applications in broad spectrum. History reveals the synthesis of numerous antimicrobial polymers using various antimicrobial agents but lacks the use of piperazine molecule, which is of pharmaceutical importance. This review gives an insight into the current and future perspective for the development of piperazine-based antimicrobial polymers.
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Affiliation(s)
- Manohara Dhulappa Jalageri
- Department of Chemistry, Manipal Institute of Technology, Manipal Academy of Higher Education Manipal 576 104 India
| | - Akshatha Nagaraja
- Department of Chemistry, Manipal Institute of Technology, Manipal Academy of Higher Education Manipal 576 104 India
| | - Yashoda Malgar Puttaiahgowda
- Department of Chemistry, Manipal Institute of Technology, Manipal Academy of Higher Education Manipal 576 104 India
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The Role of the Catalyst on the Reactivity and Mechanism in the Diels–Alder Cycloaddition Step of the Povarov Reaction for the Synthesis of a Biological Active Quinoline Derivative: Experimental and Theoretical Investigations. ORGANICS 2021. [DOI: 10.3390/org2010006] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023] Open
Abstract
An experimental and theoretical study of the reactivity and mechanism of the non-catalyzed and catalyzed Povarov reaction for the preparation of a 4-ethoxy-2,3,4,4a-tetrahydro-2-phenylquinoline as a biological active quinoline derivative has been performed. The optimization of experimental conditions indicate that the use of a catalyst, namely Lewis acid with an electron-releasing group, creates the best experimental conditions for this kind of reaction. The chemical structure was characterized by the usual spectroscopic methods. The prepared quinoline derivative has been also tested in vitro for antibacterial activity, which displays moderate inhibitory activity against both Escherichia coli and Staphylococcus aureus. The antioxidant activity was investigated in vitro by evaluating their reaction with 1,1-diphenyl-2-picrylhydrazyl DPPH radical, which reveals high reactivity. The computational study was performed on the Diels–Alder step of the Povarov reaction using a B3LYP/6-31G(d,p) level of theory. The conceptual DFT reactivity indices explain well the reactivity and the meta regioselectivity experimentally observed. Both catalysts enhance the reactivity of the imine, favoring the formation of the meta regioisomers with a low activation energy, and they change the mechanism to highly synchronous for the Lewis acid and to stepwise for the Brønsted acid. The reaction of imine with allyl alcohol does not give any product, which requires high activation energy.
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Wiesenfeldt MP, Moock D, Paul D, Glorius F. Enantioselective hydrogenation of annulated arenes: controlled formation of multiple stereocenters in adjacent rings. Chem Sci 2021; 12:5611-5615. [PMID: 34163775 PMCID: PMC8179591 DOI: 10.1039/d0sc07099h] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/30/2020] [Accepted: 03/03/2021] [Indexed: 11/21/2022] Open
Abstract
We report a method for the enantioselective hydrogenation of annulated arenes using 4H-pyrido[1,2-a]pyrimidinones as substrates. The method selectively generates multiple stereocenters in adjacent rings leading to architecturally complex motifs, which resemble bioactive molecules. The mechanistic study of the stereochemical outcome revealed that the catalyst is able to overcome substrate stereocontrol providing all-cis-substituted products predominantly. In a sequential protocol, a matching interaction between catalyst and substrate stereocontrol is achieved that facilitates diastereo- and enantioselective access to trans-products.
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Affiliation(s)
- Mario P Wiesenfeldt
- Westfälische Wilhelms-Universität Münster, Organisch-Chemisches Institut Corrensstraße 40 48149 Münster Germany
| | - Daniel Moock
- Westfälische Wilhelms-Universität Münster, Organisch-Chemisches Institut Corrensstraße 40 48149 Münster Germany
| | - Daniel Paul
- Westfälische Wilhelms-Universität Münster, Organisch-Chemisches Institut Corrensstraße 40 48149 Münster Germany
| | - Frank Glorius
- Westfälische Wilhelms-Universität Münster, Organisch-Chemisches Institut Corrensstraße 40 48149 Münster Germany
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