1
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Saha R, Hembram BC, Panda S, Jana NC, Bagh B. Iron- and base-catalyzed C(α)-alkylation and one-pot sequential alkylation-hydroxylation of oxindoles with secondary alcohols. Org Biomol Chem 2024; 22:6321-6330. [PMID: 39039931 DOI: 10.1039/d4ob00957f] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 07/24/2024]
Abstract
The utilization of economical and environmentally benign transition metals in crucial catalytic processes is pivotal for sustainable advancement in synthetic organic chemistry. Iron, as the most abundant transition metal in the Earth's crust, has gained significant attention for this purpose. A combination of FeCl2 (5 mol%) in the presence of phenanthroline (10 mol%) and NaOtBu (1.5 equivalent) proved effective for the C(α)-alkylation of oxindole, employing challenging secondary alcohol as a non-hazardous alkylating agent. The C(α)-alkylation of oxindole was optimized in green solvent or under neat conditions. The substrate scope encompasses a broad array of substituted oxindoles with various secondary alcohols. Further post-functionalization of the C(α)-alkylated oxindole products demonstrated the practical utility of this catalytic alkylation. One-pot C-H hydroxylation of alkylated oxindoles yielded 3-alkyl-3-hydroxy-2-oxindoles using air as the most sustainable oxidant. Low E-factors (3.61 to 4.19) and good Eco-scale scores (74 to 76) of these sustainable catalytic protocols for the alkylation and one-pot sequential alkylation-hydroxylation of oxindoles demonstrated minimum waste generation. Plausible catalytic paths are proposed on the basis of past reports and control experiments, which suggested that a borrowing hydrogen pathway is involved in this alkylation.
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Affiliation(s)
- Ratnakar Saha
- School of Chemical Sciences, National Institute of Science Education and Research (NISER), An OCC of Homi Bhabha National Institute, Bhubaneswar, Jatni, Khurda, Odisha, PIN 752050, India.
| | - Bhairab Chand Hembram
- School of Chemical Sciences, National Institute of Science Education and Research (NISER), An OCC of Homi Bhabha National Institute, Bhubaneswar, Jatni, Khurda, Odisha, PIN 752050, India.
| | - Surajit Panda
- School of Chemical Sciences, National Institute of Science Education and Research (NISER), An OCC of Homi Bhabha National Institute, Bhubaneswar, Jatni, Khurda, Odisha, PIN 752050, India.
| | - Narayan Ch Jana
- School of Chemical Sciences, National Institute of Science Education and Research (NISER), An OCC of Homi Bhabha National Institute, Bhubaneswar, Jatni, Khurda, Odisha, PIN 752050, India.
| | - Bidraha Bagh
- School of Chemical Sciences, National Institute of Science Education and Research (NISER), An OCC of Homi Bhabha National Institute, Bhubaneswar, Jatni, Khurda, Odisha, PIN 752050, India.
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2
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Mukthapuram PR, Natarajan A. Domino Reactions Enable Zn-Mediated Direct Synthesis of Spiro-Fused 2-Oxindole-α-Methylene-γ-Butyrolactones/Lactams from Isatin Derivatives and 2-(Bromomethyl)acrylates. Molecules 2024; 29:3612. [PMID: 39125017 PMCID: PMC11314261 DOI: 10.3390/molecules29153612] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/01/2024] [Revised: 07/28/2024] [Accepted: 07/29/2024] [Indexed: 08/12/2024] Open
Abstract
Isatin-derived spirocyclic cores are found in several biologically active molecules. Here, we report nucleophilic domino reactions for the synthesis of α-methylene-γ-butyrolactone/lactam containing spirocyclic oxindoles. The Zn-mediated one-step reaction accommodates a range of substrates and can be used to rapidly generate focused libraries of highly substituted spirocyclic compound.
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Affiliation(s)
- Prathap Reddy Mukthapuram
- Eppley Institute for Research in Cancer and Allied Diseases, Fred & Pamela Buffett Cancer Center, University of Nebraska Medical Center, Omaha, NE 698198, USA
| | - Amarnath Natarajan
- Eppley Institute for Research in Cancer and Allied Diseases, Fred & Pamela Buffett Cancer Center, University of Nebraska Medical Center, Omaha, NE 698198, USA
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3
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McVeigh MS, Sorrentino JP, Hands AT, Garg NK. Access to Complex Scaffolds Through [2 + 2] Cycloadditions of Strained Cyclic Allenes. J Am Chem Soc 2024; 146:15420-15427. [PMID: 38768558 DOI: 10.1021/jacs.4c03369] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/22/2024]
Abstract
We report the strain-induced [2 + 2] cycloadditions of cyclic allenes for the assembly of highly substituted cyclobutanes. By judicious choice of trapping agent, complex scaffolds bearing heteroatoms, fused rings, contiguous stereocenters, spirocycles, and quaternary centers are ultimately accessible. Moreover, we show that the resulting cycloadducts can undergo thermal isomerization. This study provides an alternative strategy to photochemical [2 + 2] cycloadditions for accessing highly functionalized cyclobutanes, while validating the use of underexplored strained intermediates for the assembly of complex architectures.
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Affiliation(s)
- Matthew S McVeigh
- Department of Chemistry and Biochemistry, University of California, Los Angeles, California 90095, United States
| | - Jacob P Sorrentino
- Department of Chemistry and Biochemistry, University of California, Los Angeles, California 90095, United States
| | - Allison T Hands
- Department of Chemistry and Biochemistry, University of California, Los Angeles, California 90095, United States
| | - Neil K Garg
- Department of Chemistry and Biochemistry, University of California, Los Angeles, California 90095, United States
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4
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Liang G, Anderson EA. Sequencing palladium-catalyzed cycloisomerization cascades in a synthesis of the gelsemine core. Chem Sci 2023; 14:6970-6974. [PMID: 37389268 PMCID: PMC10306092 DOI: 10.1039/d3sc01353g] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/13/2023] [Accepted: 06/05/2023] [Indexed: 07/01/2023] Open
Abstract
Transition metal-catalyzed cycloisomerization is a powerful strategy for the construction of cyclic organic molecules, and the use of palladium catalysts can deliver a wide range of monocyclic and bicyclic products. However, applications of cycloisomerizations in complex target synthesis in which more than one cycloisomerization process is deployed in a cascade context are rare. Here we report investigations of the relative rates of two different types of ene-ynamide cycloisomerization that form fused and spirocyclic rings, and use of these results to design a sequence-controlled cascade cycloisomerization that prepares the tetracyclic core of gelsemine in a single step. Crucial to this work was an evaluation of the kinetics of each cycloisomerization in competition experiments, which revealed a key influence of the ynamide electron-withdrawing group on the cycloisomerization reaction.
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Affiliation(s)
- Guoduan Liang
- Chemistry Research Laboratory, Department of Chemistry, University of Oxford 12 Mansfield Road Oxford OX1 3TA UK
| | - Edward A Anderson
- Chemistry Research Laboratory, Department of Chemistry, University of Oxford 12 Mansfield Road Oxford OX1 3TA UK
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5
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Hwang T, Wood JL. Asymmetric synthesis of a versatile 1,2,3-trisubstituted cyclopentane synthetic building block. Tetrahedron 2023. [DOI: 10.1016/j.tet.2023.133384] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/05/2023]
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6
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Jung M, Muir JE, Lindsay VNG. Expedient synthesis of spiro[3.3]heptan-1-ones via strain-relocating semipinacol rearrangements. Tetrahedron 2023; 134:133296. [PMID: 36937489 PMCID: PMC10019042 DOI: 10.1016/j.tet.2023.133296] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Abstract
A novel approach for the formation of the highly strained spiro[3.3]heptan-1-one motif was developed through the reaction of 1-sulfonylcyclopropanols and lithiated 1-sulfonylbicyclo[1.1.0]butanes. Following initial nucleophilic addition to the cyclopropanone formed in situ, the resulting 1-bicyclobutylcyclopropanol intermediate is prone to a 'strain-relocating' semipinacol rearrangement in the presence of acid, directly affording the substituted spiro[3.3]heptan-1-one. The process is shown to be fully regio- and stereospecific when starting from a substituted cyclopropanone equivalent, leading to optically active 3-substituted spiro[3.3]heptan-1-ones. The reaction likely proceeds via initial protonation of the bicyclobutyl moiety followed by [1,2]-rearrangement of the resulting cyclopropylcarbinyl cation.
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Affiliation(s)
- Myunggi Jung
- Department of Chemistry, North Carolina State University, 2620 Yarbrough Drive, Raleigh, North Carolina 27695, United States
| | - Joanna E Muir
- Department of Chemistry, North Carolina State University, 2620 Yarbrough Drive, Raleigh, North Carolina 27695, United States
| | - Vincent N G Lindsay
- Department of Chemistry, North Carolina State University, 2620 Yarbrough Drive, Raleigh, North Carolina 27695, United States
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7
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Saini P, Dolui P, Nair A, Verma A, Elias AJ. A Bench-stable 8-Aminoquinoline Derived Phosphine-free Manganese (I)-Catalyst for Environmentally Benign C(α)-Alkylation of Oxindoles with Secondary and Primary Alcohols. Chem Asian J 2023; 18:e202201148. [PMID: 36688923 DOI: 10.1002/asia.202201148] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/14/2022] [Revised: 01/11/2023] [Accepted: 01/23/2023] [Indexed: 01/24/2023]
Abstract
Herein, we report a new air-stable phosphine-free 8-AQ (8-aminoquinoline) based Mn(I) carbonyl complex as the catalyst for the C(α)-alkylation of oxindoles with alcohols. The Mn complex [(8-AQ)Mn(CO)3 Br] works effectively as a catalyst for the α-alkylation of oxindoles by both secondary as well as primary alcohols. The procedure has been used for the synthesis of pharmaceutically important recently developed oxindoles such as 3-(4-methoxybenzyl)indolin-2-one, 3-(4-(dimethylamino)benzyl)indolin-2-one, 3-(4-(dimethylamino)phenyl)-5-fluoroindolin-2-one and 3-(benzo[d][1,3]dioxol-5-ylmethyl)indolin-2-one, which are found to be effective in preventing specific types of cell death in neurodegenerative disorders. Control experiments have been carried out to investigate the reaction mechanism and the crucial role of metal-ligand cooperation via -NH2 moiety during catalysis.
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Affiliation(s)
- Parul Saini
- Department of Chemistry, Indian Institute of Technology, Delhi, Hauz Khas, New Delhi, 110016, India
| | - Pritam Dolui
- Department of Chemistry, Indian Institute of Technology, Delhi, Hauz Khas, New Delhi, 110016, India
| | - Abhishek Nair
- Department of Chemistry, Indian Institute of Technology, Delhi, Hauz Khas, New Delhi, 110016, India
| | - Ashutosh Verma
- Department of Chemistry, Indian Institute of Technology, Delhi, Hauz Khas, New Delhi, 110016, India
| | - Anil J Elias
- Department of Chemistry, Indian Institute of Technology, Delhi, Hauz Khas, New Delhi, 110016, India
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8
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Gribble GW. Naturally Occurring Organohalogen Compounds-A Comprehensive Review. PROGRESS IN THE CHEMISTRY OF ORGANIC NATURAL PRODUCTS 2023; 121:1-546. [PMID: 37488466 DOI: 10.1007/978-3-031-26629-4_1] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 07/26/2023]
Abstract
The present volume is the third in a trilogy that documents naturally occurring organohalogen compounds, bringing the total number-from fewer than 25 in 1968-to approximately 8000 compounds to date. Nearly all of these natural products contain chlorine or bromine, with a few containing iodine and, fewer still, fluorine. Produced by ubiquitous marine (algae, sponges, corals, bryozoa, nudibranchs, fungi, bacteria) and terrestrial organisms (plants, fungi, bacteria, insects, higher animals) and universal abiotic processes (volcanos, forest fires, geothermal events), organohalogens pervade the global ecosystem. Newly identified extraterrestrial sources are also documented. In addition to chemical structures, biological activity, biohalogenation, biodegradation, natural function, and future outlook are presented.
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Affiliation(s)
- Gordon W Gribble
- Department of Chemistry, Dartmouth College, Hanover, NH, 03755, USA.
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9
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Rodríguez L, Delgado A, Ciudad CJ, Noé V, Bonjoch J, Bradshaw B. Base-Mediated Nitrophenyl Reductive Cyclization for the Synthesis of Hexahydro-2,6-methano-1-benzazocines. J Org Chem 2022; 87:15693-15702. [PMID: 36329560 PMCID: PMC9680033 DOI: 10.1021/acs.joc.2c02205] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Abstract
A Diels-Alder reaction leading to 4-nitrophenylcyclohexanones followed by a newly developed base-mediated reductive cyclization of the resulting ketone tethered to the nitrobenzene moiety gives access to the hexahydro-2,6-methano-1-benzazocine ring system present in several biologically interesting natural products such as aspernomine. The scope of the reaction was explored with eight substituted nitrobenzenes, obtaining yields of up to 87%. The highest cytotoxicity was observed in benzazocine 4h, bearing an enone moiety, which was active against eight cancer cell lines.
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Affiliation(s)
- Laura
G. Rodríguez
- Laboratori
de Química Orgànica, Facultat de Farmàcia, IBUB, Universitat de Barcelona, Avenida Joan XXIII 27-31, 08028 Barcelona, Spain
| | - Ana Delgado
- Department
of Biochemistry and Physiology, Faculty of Pharmacy & IN2UB, University of Barcelona, Avenida Joan XXIII 27-31, 08028 Barcelona, Spain
| | - Carlos J. Ciudad
- Department
of Biochemistry and Physiology, Faculty of Pharmacy & IN2UB, University of Barcelona, Avenida Joan XXIII 27-31, 08028 Barcelona, Spain
| | - Véronique Noé
- Department
of Biochemistry and Physiology, Faculty of Pharmacy & IN2UB, University of Barcelona, Avenida Joan XXIII 27-31, 08028 Barcelona, Spain
| | - Josep Bonjoch
- Laboratori
de Química Orgànica, Facultat de Farmàcia, IBUB, Universitat de Barcelona, Avenida Joan XXIII 27-31, 08028 Barcelona, Spain,
| | - Ben Bradshaw
- Laboratori
de Química Orgànica, Facultat de Farmàcia, IBUB, Universitat de Barcelona, Avenida Joan XXIII 27-31, 08028 Barcelona, Spain,
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10
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Hui C, Craggs L, Antonchick AP. Ring contraction in synthesis of functionalized carbocycles. Chem Soc Rev 2022; 51:8652-8675. [PMID: 36172989 DOI: 10.1039/d1cs01080h] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Carbocycles are a key and widely present structural motif in organic compounds. The construction of structurally intriguing carbocycles, such as highly-strained fused rings, spirocycles or highly-functionalized carbocycles with congested stereocenters, remains challenging in organic chemistry. Cyclopropanes, cyclobutanes and cyclopentanes within such carbocycles can be synthesized through ring contraction. These ring contractions involve re-arrangement of and/or small molecule extrusion from a parental ring, which is either a carbocycle or a heterocycle of larger size. This review provides an overview of synthetic methods for ring contractions to form cyclopropanes, cyclobutanes and cyclopentanes en route to structurally intriguing carbocycles.
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Affiliation(s)
- Chunngai Hui
- Max Planck Institute of Molecular Physiology, Department of Chemical Biology, Otto-Hahn-Strasse 11, 44227 Dortmund, Germany. .,Technical University Dortmund, Faculty of Chemistry and Chemical Biology, Otto-Hahn-Strasse 6, 44221 Dortmund, Germany
| | - Luke Craggs
- Nottingham Trent University, School of Science and Technology, Department of Chemistry and Forensics, Clifton Lane, NG11 8NS Nottingham, UK
| | - Andrey P Antonchick
- Max Planck Institute of Molecular Physiology, Department of Chemical Biology, Otto-Hahn-Strasse 11, 44227 Dortmund, Germany. .,Technical University Dortmund, Faculty of Chemistry and Chemical Biology, Otto-Hahn-Strasse 6, 44221 Dortmund, Germany.,Nottingham Trent University, School of Science and Technology, Department of Chemistry and Forensics, Clifton Lane, NG11 8NS Nottingham, UK
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11
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Grünenfelder DC, Navarro R, Wang H, Fastuca NJ, Butler JR, Reisman SE. Enantioselective Synthesis of (-)-10-Hydroxyacutuminine. Angew Chem Int Ed Engl 2022; 61:e202117480. [PMID: 35112449 DOI: 10.1002/anie.202117480] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/22/2021] [Indexed: 11/08/2022]
Abstract
An enantioselective synthesis of (-)-10-hydroxyacutuminine is reported. Central to our strategy is a photochemical [2+2] cycloaddition that forges two of the quaternary stereocenters present in the acutumine alkaloids. A subsequent retro-aldol/Dieckmann sequence furnishes the spirocyclic cyclopentenone. Efforts to chlorinate the acutumine scaffold at C10 under heterolytic or radical deoxychlorination conditions led to the synthesis of an unexpected cyclopropane-containing pentacycle.
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Affiliation(s)
- Denise C Grünenfelder
- The Warren and Katharine Schlinger Laboratory of Chemistry and Chemical Engineering, Division of Chemistry and Chemical Engineering, California Institute of Technology, Pasadena, CA 91125, USA
| | - Raul Navarro
- The Warren and Katharine Schlinger Laboratory of Chemistry and Chemical Engineering, Division of Chemistry and Chemical Engineering, California Institute of Technology, Pasadena, CA 91125, USA
| | - Haoxuan Wang
- The Warren and Katharine Schlinger Laboratory of Chemistry and Chemical Engineering, Division of Chemistry and Chemical Engineering, California Institute of Technology, Pasadena, CA 91125, USA
| | - Nicholas J Fastuca
- The Warren and Katharine Schlinger Laboratory of Chemistry and Chemical Engineering, Division of Chemistry and Chemical Engineering, California Institute of Technology, Pasadena, CA 91125, USA
| | - John R Butler
- The Warren and Katharine Schlinger Laboratory of Chemistry and Chemical Engineering, Division of Chemistry and Chemical Engineering, California Institute of Technology, Pasadena, CA 91125, USA
| | - Sarah E Reisman
- The Warren and Katharine Schlinger Laboratory of Chemistry and Chemical Engineering, Division of Chemistry and Chemical Engineering, California Institute of Technology, Pasadena, CA 91125, USA
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12
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Grünenfelder DC, Navarro R, Wang H, Fastuca NJ, Butler JR, Reisman SE. Enantioselective Synthesis of (−)‐10‐Hydroxyacutuminine. Angew Chem Int Ed Engl 2022. [DOI: 10.1002/ange.202117480] [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)
- Denise C. Grünenfelder
- The Warren and Katharine Schlinger Laboratory of Chemistry and Chemical Engineering Division of Chemistry and Chemical Engineering California Institute of Technology Pasadena CA 91125 USA
| | - Raul Navarro
- The Warren and Katharine Schlinger Laboratory of Chemistry and Chemical Engineering Division of Chemistry and Chemical Engineering California Institute of Technology Pasadena CA 91125 USA
| | - Haoxuan Wang
- The Warren and Katharine Schlinger Laboratory of Chemistry and Chemical Engineering Division of Chemistry and Chemical Engineering California Institute of Technology Pasadena CA 91125 USA
| | - Nicholas J. Fastuca
- The Warren and Katharine Schlinger Laboratory of Chemistry and Chemical Engineering Division of Chemistry and Chemical Engineering California Institute of Technology Pasadena CA 91125 USA
| | - John R. Butler
- The Warren and Katharine Schlinger Laboratory of Chemistry and Chemical Engineering Division of Chemistry and Chemical Engineering California Institute of Technology Pasadena CA 91125 USA
| | - Sarah E. Reisman
- The Warren and Katharine Schlinger Laboratory of Chemistry and Chemical Engineering Division of Chemistry and Chemical Engineering California Institute of Technology Pasadena CA 91125 USA
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13
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Subaramanian M, Sivakumar G, Balaraman E. First-Row Transition-Metal Catalyzed Acceptorless Dehydrogenation and Related Reactions: A Personal Account. CHEM REC 2021; 21:3839-3871. [PMID: 34415674 DOI: 10.1002/tcr.202100165] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/12/2021] [Revised: 07/17/2021] [Accepted: 08/04/2021] [Indexed: 12/17/2022]
Abstract
The development of sustainable catalytic protocols that circumvent the use of expensive and precious metal catalysts and avoid toxic reagents plays a crucial role in organic synthesis. Indeed, the direct employment of simple and abundantly available feedstock chemicals as the starting materials broadens their synthetic application in contemporary research. In particular, the transition metal-catalyzed diversification of alcohols with various nucleophilic partners to construct a wide range of building blocks is a powerful and highly desirable methodology. Moreover, the replacement of precious metal catalysts by non-precious and less toxic metals for selective transformations is one of the main goals and has been paid significant attention to in modern chemistry. In view of this, the first-row transition metal catalysts find extensive applications in various synthetic transformations such as catalytic hydrogenation, dehydrogenation, and related reactions. Herein, we have disclosed our recent developments on the base-metal catalysis such as Mn, Fe, Co, and Ni for the acceptorless dehydrogenation reactions and its application in the C-C and C-N bond formation via hydrogen auto-transfer (HA) and acceptorless dehydrogenation coupling (ADC) reactions. These HA/ADC protocols employ alcohol as alkylating agents and eliminate water and/or hydrogen gas as by-products, representing highly atom-efficient and environmentally benign reactions. Furthermore, diverse simple to complex organic molecules synthesis by C-C and C-N bond formation using feedstock alcohols are also overviewed. Overall, this account deals with the contribution and development of efficient and novel homogeneous as well as heterogeneous base-metal catalysts for sustainable chemical synthesis.
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Affiliation(s)
- Murugan Subaramanian
- Department of Chemistry, Indian Institute of Science Education and Research (IISER) Tirupati, Tirupati, 517507, India
| | - Ganesan Sivakumar
- Department of Chemistry, Indian Institute of Science Education and Research (IISER) Tirupati, Tirupati, 517507, India
| | - Ekambaram Balaraman
- Department of Chemistry, Indian Institute of Science Education and Research (IISER) Tirupati, Tirupati, 517507, India
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14
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Rana J, Nagarasu P, Subaramanian M, Mondal A, Madhu V, Balaraman E. Manganese-Catalyzed C(α)-Alkylation of Oxindoles with Secondary Alcohols via Borrowing Hydrogen. Organometallics 2021. [DOI: 10.1021/acs.organomet.1c00009] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
Affiliation(s)
- Jagannath Rana
- Department of Chemistry, Indian Institute of Science Education and Research (IISER) Tirupati, Tirupati 517507, India
| | - Palaniyappan Nagarasu
- Department of Applied Chemistry, Karunya Institute of Technology and Science (Deemed to be University), Coimbatore 641114, Tamil Nadu, India
| | - Murugan Subaramanian
- Department of Chemistry, Indian Institute of Science Education and Research (IISER) Tirupati, Tirupati 517507, India
| | - Akash Mondal
- Department of Chemistry, Indian Institute of Science Education and Research (IISER) Tirupati, Tirupati 517507, India
| | - Vedichi Madhu
- Department of Applied Chemistry, Karunya Institute of Technology and Science (Deemed to be University), Coimbatore 641114, Tamil Nadu, India
| | - Ekambaram Balaraman
- Department of Chemistry, Indian Institute of Science Education and Research (IISER) Tirupati, Tirupati 517507, India
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15
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Feng Y, Zhao S, Du G, Zhang S, Zhang D, Liu H, Li X, Dong Y, Sun FG. Intermolecular alkene arylcyanation using BnSCN as a cyanide source via a reductive strategy: access to 3,3-disubstituted oxindoles. Org Chem Front 2021. [DOI: 10.1039/d0qo01462a] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Herein, a nickel-catalyzed two-component reductive arylcyanation of aryl (pseudo)halide tethered alkenes using benzyl thiocyanate as a cyanide source via C–S bond activation is developed.
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Affiliation(s)
- Yunxia Feng
- School of Chemistry and Chemical Engineering
- Shandong University of Technology
- Zibo 255049
- P. R. China
| | - Shen Zhao
- School of Chemistry and Chemical Engineering
- Shandong University of Technology
- Zibo 255049
- P. R. China
| | - Guopeng Du
- School of Chemistry and Chemical Engineering
- Shandong University of Technology
- Zibo 255049
- P. R. China
| | - Shuang Zhang
- School of Chemistry and Chemical Engineering
- Shandong University of Technology
- Zibo 255049
- P. R. China
| | - Daopeng Zhang
- School of Chemistry and Chemical Engineering
- Shandong University of Technology
- Zibo 255049
- P. R. China
| | - Hui Liu
- School of Chemistry and Chemical Engineering
- Shandong University of Technology
- Zibo 255049
- P. R. China
| | - Xinjin Li
- School of Chemistry and Chemical Engineering
- Shandong University of Technology
- Zibo 255049
- P. R. China
| | - Yunhui Dong
- School of Chemistry and Chemical Engineering
- Shandong University of Technology
- Zibo 255049
- P. R. China
| | - Feng-Gang Sun
- School of Chemistry and Chemical Engineering
- Shandong University of Technology
- Zibo 255049
- P. R. China
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16
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Abstract
This review summaries recent synthetic developments towards spirocyclic oxindoles and applications as valuable medicinal and synthetic targets.
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Affiliation(s)
- Alexander J. Boddy
- Department of Chemistry
- Imperial College London
- Molecular Sciences Research Hub
- London W12 0BZ
- UK
| | - James A. Bull
- Department of Chemistry
- Imperial College London
- Molecular Sciences Research Hub
- London W12 0BZ
- UK
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17
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Ren LQ, He YS, Yang YT, Li ZF, Xue ZY, Li QH, Liu TL. Chlorocyclization/cycloreversion of allylic alcohols to vinyl chlorides. Org Chem Front 2021. [DOI: 10.1039/d1qo01218e] [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
Unprecedented chlorination of allylic alcohols: a simple mix-and-go procedure for the cyclization/cycloreversion of secondary and tertiary allylic alcohols with chloronium ions under mild conditions and practical access to remote carbonyl vinyl chlorides.
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Affiliation(s)
- Li-Qing Ren
- School of Chemistry and Chemical Engineering, Southwest University, No. 2, Tiansheng Road, Beibei, Chongqing, 400715, China
| | - Yu-Shuai He
- School of Chemistry and Chemical Engineering, Southwest University, No. 2, Tiansheng Road, Beibei, Chongqing, 400715, China
| | - Yu-Ting Yang
- School of Chemistry and Chemical Engineering, Southwest University, No. 2, Tiansheng Road, Beibei, Chongqing, 400715, China
| | - Zhao-Feng Li
- School of Chemistry and Chemical Engineering, Southwest University, No. 2, Tiansheng Road, Beibei, Chongqing, 400715, China
| | - Zhi-Yong Xue
- Hubei Key Laboratory of Biomass Fibers and Eco-dyeing & Finishing, College of Chemistry and Chemical Engineering, Wuhan Textile University, Wuhan 430073, China
| | - Qing-Hua Li
- School of Chemistry and Chemical Engineering, Southwest University, No. 2, Tiansheng Road, Beibei, Chongqing, 400715, China
| | - Tang-Lin Liu
- School of Chemistry and Chemical Engineering, Southwest University, No. 2, Tiansheng Road, Beibei, Chongqing, 400715, China
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18
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Tripolitsiotis NP, Thomaidi M, Neochoritis CG. The Ugi Three‐Component Reaction; a Valuable Tool in Modern Organic Synthesis. European J Org Chem 2020. [DOI: 10.1002/ejoc.202001157] [Citation(s) in RCA: 18] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Affiliation(s)
| | - Maria Thomaidi
- Chemistry Department School of Science and Engineering University of Crete 70013 Heraklion Greece
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19
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Kurimoto M, Nakajima D, Nishiyama Y, Yokoshima S. Semipinacol Rearrangement Induced by Cleavage of Dibromocyclopropane. European J Org Chem 2020. [DOI: 10.1002/ejoc.202000355] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Affiliation(s)
- Michitaka Kurimoto
- Graduate School of Pharmaceutical Sciences Nagoya University Furo‐cho, Chikusa‐ku 464‐8601 Nagoya Japan
| | - Daisuke Nakajima
- Graduate School of Pharmaceutical Sciences Nagoya University Furo‐cho, Chikusa‐ku 464‐8601 Nagoya Japan
| | - Yoshitake Nishiyama
- Graduate School of Pharmaceutical Sciences Nagoya University Furo‐cho, Chikusa‐ku 464‐8601 Nagoya Japan
| | - Satoshi Yokoshima
- Graduate School of Pharmaceutical Sciences Nagoya University Furo‐cho, Chikusa‐ku 464‐8601 Nagoya Japan
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20
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Azizollahi H, Pérez‐Gómez M, Mehta VP, García‐López J. Synthesis of [3.4]‐Spirooxindoles through Cascade Carbopalladation of Skipped Dienes. Adv Synth Catal 2020. [DOI: 10.1002/adsc.202000111] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/16/2023]
Affiliation(s)
- Hamid Azizollahi
- Grupo de Química OrganometálicaUniversidad de Murcia Campus de Espinardo 30100 Murcia Spain
- Department of ChemistryFaculty of ScienceFerdowsi University of Mashhad 91775-1436 Mashhad Iran
| | - Marta Pérez‐Gómez
- Grupo de Química OrganometálicaUniversidad de Murcia Campus de Espinardo 30100 Murcia Spain
| | - Vaibhav P. Mehta
- Grupo de Química OrganometálicaUniversidad de Murcia Campus de Espinardo 30100 Murcia Spain
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21
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Zhang Y, Wu XY, Han J, Wong HN. Chiral iminophosphorane catalyzed asymmetric phenylselenylation of 3-substituted oxindoles. Tetrahedron Lett 2020. [DOI: 10.1016/j.tetlet.2019.151559] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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22
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Synthesis of γ-lactams via trifluoromethylative aminocarbonylation of unactivated olefins. Tetrahedron Lett 2020. [DOI: 10.1016/j.tetlet.2019.151479] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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23
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Mokhtari TS, Seifi M, Saheb V, Sheibani H. Polar [3 + 2] cycloaddition of isatin-3-imines with electrophilically activated heteroaromatic N-ylides: Synthesis of spirocyclic imidazo[1,2-a]pyridine and isoquinoline derivatives. ARAB J CHEM 2019. [DOI: 10.1016/j.arabjc.2015.05.023] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022] Open
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24
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Pfaffenbach M, Bakanas I, O'Connor NR, Herrick JL, Sarpong R. Total Syntheses of Xiamycins A, C, F, H and Oridamycin A and Preliminary Evaluation of their Anti‐Fungal Properties. Angew Chem Int Ed Engl 2019. [DOI: 10.1002/ange.201908399] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
Affiliation(s)
| | - Ian Bakanas
- Department of Chemistry University of California Berkeley CA 94720 USA
| | | | | | - Richmond Sarpong
- Department of Chemistry University of California Berkeley CA 94720 USA
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25
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Pfaffenbach M, Bakanas I, O'Connor NR, Herrick JL, Sarpong R. Total Syntheses of Xiamycins A, C, F, H and Oridamycin A and Preliminary Evaluation of their Anti-Fungal Properties. Angew Chem Int Ed Engl 2019; 58:15304-15308. [PMID: 31419367 PMCID: PMC6791741 DOI: 10.1002/anie.201908399] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/06/2019] [Indexed: 01/22/2023]
Abstract
Divergent and enantiospecific total syntheses of the indolosesquiterpenoids xiamycins A, C, F, H and oridamycin A have been accomplished. The syntheses, which commence from (R)-carvone, employ a key photoinduced benzannulation sequence to forge the carbazole moiety characteristic of these natural products. Late-stage diversification from a common intermediate enabled the first syntheses of xiamycins C and F, and an unexpected one-pot oxidative decarboxylation, which may prove general, led to xiamycin H. All synthetic intermediates and the natural products were tested for anti-fungal activity. Xiamycin H emerged as an inhibitor of three agriculturally relevant fungal pathogens.
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Affiliation(s)
- Magnus Pfaffenbach
- Department of Chemistry, University of California, Berkeley, CA, 94720, USA
| | - Ian Bakanas
- Department of Chemistry, University of California, Berkeley, CA, 94720, USA
| | | | - Jessica L Herrick
- Corteva Agriscience, Crop Protection Discovery, Zionsville, IN, 46077, USA
| | - Richmond Sarpong
- Department of Chemistry, University of California, Berkeley, CA, 94720, USA
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26
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Wang P, Zhao B, Yuan Y, Shi Z. Radical-induced ring-opening and reconstruction of cyclobutanone oxime esters. Chem Commun (Camb) 2019; 55:1971-1974. [DOI: 10.1039/c8cc10109d] [Citation(s) in RCA: 31] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The first example of intramolecular ring-opening and reconstruction of cyclobutanone oxime esters via selective C–C bond cleavage leading to the synthesis of 3,4-dihydronaphthalene-2-carbonitriles in the presence of a cheap copper catalyst has been reported.
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Affiliation(s)
- Panpan Wang
- College of Chemistry and Chemical Engineering
- Yangzhou University
- Yangzhou 225002
- China
- State Key Laboratory of Coordination Chemistry
| | - Binlin Zhao
- State Key Laboratory of Coordination Chemistry
- School of Chemistry and Chemical Engineering
- Nanjing University
- Nanjing
- China
| | - Yu Yuan
- College of Chemistry and Chemical Engineering
- Yangzhou University
- Yangzhou 225002
- China
| | - Zhuangzhi Shi
- State Key Laboratory of Coordination Chemistry
- School of Chemistry and Chemical Engineering
- Nanjing University
- Nanjing
- China
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27
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Chen D, Ji M, Zhu C. Intramolecular nitration–aminocarbonylation of unactivated olefins: metal-free synthesis of γ-lactams. Chem Commun (Camb) 2019; 55:7796-7799. [DOI: 10.1039/c9cc03736e] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A novel, metal-free synthesis of valuable γ-lactams through the radical-mediated nitration–aminocarbonylation of unactivated olefins is reported.
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Affiliation(s)
- Dong Chen
- Key Laboratory of Organic Synthesis of Jiangsu Province
- College of Chemistry
- Chemical Engineering and Materials Science
- Soochow University
- Suzhou
| | - Meishan Ji
- Key Laboratory of Organic Synthesis of Jiangsu Province
- College of Chemistry
- Chemical Engineering and Materials Science
- Soochow University
- Suzhou
| | - Chen Zhu
- Key Laboratory of Organic Synthesis of Jiangsu Province
- College of Chemistry
- Chemical Engineering and Materials Science
- Soochow University
- Suzhou
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28
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Jiang X, Wang H, He H, Wang W, Wang Y, Ke Z, Yeung YY. Enantioseletive Fluorination of 3-Functionalized Oxindoles Using Electron-rich Amino Urea Catalyst. Adv Synth Catal 2018. [DOI: 10.1002/adsc.201801133] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Affiliation(s)
- Xiaojian Jiang
- Jinan University College of Pharmacy; Institute of New Drug Research and Guangzhou Key Laboratory of Innovative Chemical Drug Research in Cardiocerebrovascular Diseases; Guangzhou 510632 People's Republic of China
| | - Haitao Wang
- Jinan University College of Pharmacy; Institute of New Drug Research and Guangzhou Key Laboratory of Innovative Chemical Drug Research in Cardiocerebrovascular Diseases; Guangzhou 510632 People's Republic of China
| | - Haoquan He
- Jinan University College of Pharmacy; Institute of New Drug Research and Guangzhou Key Laboratory of Innovative Chemical Drug Research in Cardiocerebrovascular Diseases; Guangzhou 510632 People's Republic of China
| | - Wei Wang
- Jinan University College of Pharmacy; Institute of New Drug Research and Guangzhou Key Laboratory of Innovative Chemical Drug Research in Cardiocerebrovascular Diseases; Guangzhou 510632 People's Republic of China
| | - Yuqiang Wang
- Jinan University College of Pharmacy; Institute of New Drug Research and Guangzhou Key Laboratory of Innovative Chemical Drug Research in Cardiocerebrovascular Diseases; Guangzhou 510632 People's Republic of China
| | - Zhihai Ke
- Department of Chemistry; The Chinese University of Hong Kong, Shatin, NT; Hong Kong People's Republic of China
| | - Ying-Yeung Yeung
- Department of Chemistry; The Chinese University of Hong Kong, Shatin, NT; Hong Kong People's Republic of China
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29
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Qiu Y, Dlugosch M, Liu X, Khan F, Ward JS, Lan P, Banwell MG. Reductive Cyclization of o-Nitroarylated-α,β-unsaturated Aldehydes and Ketones with TiCl 3/HCl or Fe/HCl Leading to 1,2,3,9-Tetrahydro-4 H-carbazol-4-ones and Related Heterocycles. J Org Chem 2018; 83:12023-12033. [PMID: 30180589 DOI: 10.1021/acs.joc.8b01940] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Compounds such as 3, the product of a palladium[0]-catalyzed Ullmann cross-coupling of o-iodonitrobenzene and 2-iodocyclohex-2-en-1-one, undergo complementary modes of reductive cyclization depending upon the conditions employed. Thus, on treatment with hydrogen in the presence of palladium on carbon, the tetrahydrocarbazole 4 is formed, while reaction of the same substrate (3) with TiCl3 in acetone affords the 1,2,3,9-tetrahydro-4 H-carbazol-4-one 6.
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Affiliation(s)
- Yun Qiu
- Department of Food Science and Engineering , Jinan University , Guangzhou 510632 , China
| | - Michael Dlugosch
- Research School of Chemistry , Institute of Advanced Studies, The Australian National University , Canberra , ACT 2601 , Australia
| | - Xin Liu
- Research School of Chemistry , Institute of Advanced Studies, The Australian National University , Canberra , ACT 2601 , Australia
| | - Faiyaz Khan
- Research School of Chemistry , Institute of Advanced Studies, The Australian National University , Canberra , ACT 2601 , Australia
| | - Jas S Ward
- Research School of Chemistry , Institute of Advanced Studies, The Australian National University , Canberra , ACT 2601 , Australia
| | - Ping Lan
- Department of Food Science and Engineering , Jinan University , Guangzhou 510632 , China
| | - Martin G Banwell
- Research School of Chemistry , Institute of Advanced Studies, The Australian National University , Canberra , ACT 2601 , Australia
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30
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Qin H, Chen J, Li K, He Z, Zhou Y, Fan B. Nickel-Catalyzed Asymmetric [2+2] Cycloaddition Reaction of Hetero-Bicyclic Alkenes with Internal Alkynes. Chem Asian J 2018; 13:2431-2434. [PMID: 29968294 DOI: 10.1002/asia.201800492] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/02/2018] [Revised: 05/14/2018] [Indexed: 12/28/2022]
Abstract
Enantioselective [2+2] cycloaddition reaction of azabenzonorbornadienes and oxabenzonorbornadienes with internal alkynes has been enabled by a catalyst system comprising Ni(COD)2 and (R)-SIPHOS-Ph-Mor. This transformation represents the first asymmetric [2+2] cycloaddition reaction of azabenzonorbornadienes with internal alkynes, providing a straightforward method to prepare four-membered carbocycles.
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Affiliation(s)
- Hongyu Qin
- YMU-HKBU Joint Laboratory of Traditional Natural Medicine, Yunnan Minzu University, Yuehua Street, Kunming, 650500, China
| | - Jingchao Chen
- YMU-HKBU Joint Laboratory of Traditional Natural Medicine, Yunnan Minzu University, Yuehua Street, Kunming, 650500, China
| | - Kangkui Li
- YMU-HKBU Joint Laboratory of Traditional Natural Medicine, Yunnan Minzu University, Yuehua Street, Kunming, 650500, China
| | - Zhenxiu He
- YMU-HKBU Joint Laboratory of Traditional Natural Medicine, Yunnan Minzu University, Yuehua Street, Kunming, 650500, China
| | - Yongyun Zhou
- YMU-HKBU Joint Laboratory of Traditional Natural Medicine, Yunnan Minzu University, Yuehua Street, Kunming, 650500, China
| | - Baomin Fan
- YMU-HKBU Joint Laboratory of Traditional Natural Medicine, Yunnan Minzu University, Yuehua Street, Kunming, 650500, China.,Key Laboratory of Chemistry in Ethnic Medicinal Resources, Yuehua Street, Kunming, 650500, China
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31
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Tiwari L, Kumar V, Kumar B, Mahajan D. A practically simple, catalyst free and scalable synthesis of N-substituted ureas in water. RSC Adv 2018; 8:21585-21595. [PMID: 35539945 PMCID: PMC9080941 DOI: 10.1039/c8ra03761b] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/02/2018] [Accepted: 06/03/2018] [Indexed: 11/21/2022] Open
Abstract
A practically simple, mild and efficient method is developed for the synthesis of N-substituted ureas by nucleophilic addition of amines to potassium isocyanate in water without organic co-solvent. Using this methodology, a variety of N-substituted ureas (mono-, di- and cyclic-) were synthesized in good to excellent yields with high chemical purity by applying simple filtration or routine extraction procedures avoiding silica gel purification. The developed methodology was also found to be suitable for gram scale synthesis of molecules having commercial application in large volumes. The identified reaction conditions were found to promote a unique substrate selectivity from a mixture of two amines.
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Affiliation(s)
- Lata Tiwari
- Drug Discovery Research Center, Translational Health Science and Technology Institute, NCR Biotech Science Cluster 3rd Milestone, Faridabad-Gurgaon Expressway Faridabad-121001 India
| | - Varun Kumar
- Drug Discovery Research Center, Translational Health Science and Technology Institute, NCR Biotech Science Cluster 3rd Milestone, Faridabad-Gurgaon Expressway Faridabad-121001 India
| | - Bhuvesh Kumar
- Drug Discovery Research Center, Translational Health Science and Technology Institute, NCR Biotech Science Cluster 3rd Milestone, Faridabad-Gurgaon Expressway Faridabad-121001 India
| | - Dinesh Mahajan
- Drug Discovery Research Center, Translational Health Science and Technology Institute, NCR Biotech Science Cluster 3rd Milestone, Faridabad-Gurgaon Expressway Faridabad-121001 India
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32
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Khan F, Dlugosch M, Liu X, Khan M, Banwell MG, Ward JS, Carr PD. Palladium-Catalyzed Ullmann Cross-Coupling of β-Iodoenones and β-Iodoacrylates with o-Halonitroarenes or o-Iodobenzonitriles and Reductive Cyclization of the Resulting Products To Give Diverse Heterocyclic Systems. Org Lett 2018; 20:2770-2773. [PMID: 29676922 DOI: 10.1021/acs.orglett.8b01015] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
Abstract
The palladium-catalyzed Ullmann cross-coupling of β-iodoenones and β-iodoacrylates such as 5 (X = I) with o-halonitroarenes and o-iodobenzonitriles including 2 affords products such as compound 7. These can be engaged in a range of reductive cyclization reactions leading to heterocyclic frameworks such as 3,4-benzomorphan derivative 43.
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Affiliation(s)
- Faiyaz Khan
- Research School of Chemistry, Institute of Advanced Studies , The Australian National University , Canberra , ACT 2601 , Australia
| | - Michael Dlugosch
- Research School of Chemistry, Institute of Advanced Studies , The Australian National University , Canberra , ACT 2601 , Australia
| | - Xin Liu
- Research School of Chemistry, Institute of Advanced Studies , The Australian National University , Canberra , ACT 2601 , Australia
| | - Marium Khan
- Research School of Chemistry, Institute of Advanced Studies , The Australian National University , Canberra , ACT 2601 , Australia
| | - Martin G Banwell
- Research School of Chemistry, Institute of Advanced Studies , The Australian National University , Canberra , ACT 2601 , Australia
| | - Jas S Ward
- Research School of Chemistry, Institute of Advanced Studies , The Australian National University , Canberra , ACT 2601 , Australia
| | - Paul D Carr
- Research School of Chemistry, Institute of Advanced Studies , The Australian National University , Canberra , ACT 2601 , Australia
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33
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Huang HM, McDouall JJW, Procter DJ. Radical Anions from Urea-type Carbonyls: Radical Cyclizations and Cyclization Cascades. Angew Chem Int Ed Engl 2018; 57:4995-4999. [PMID: 29493858 DOI: 10.1002/anie.201800667] [Citation(s) in RCA: 25] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/17/2018] [Indexed: 11/12/2022]
Affiliation(s)
- Huan-Ming Huang
- School of Chemistry; University of Manchester; Oxford Road Manchester M13 9PL UK
| | | | - David J. Procter
- School of Chemistry; University of Manchester; Oxford Road Manchester M13 9PL UK
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34
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Huang HM, McDouall JJW, Procter DJ. Radical Anions from Urea-type Carbonyls: Radical Cyclizations and Cyclization Cascades. Angew Chem Int Ed Engl 2018. [DOI: 10.1002/ange.201800667] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
Affiliation(s)
- Huan-Ming Huang
- School of Chemistry; University of Manchester; Oxford Road Manchester M13 9PL UK
| | | | - David J. Procter
- School of Chemistry; University of Manchester; Oxford Road Manchester M13 9PL UK
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35
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Huang HM, Adams RW, Procter DJ. Reductive cyclisations of amidines involving aminal radicals. Chem Commun (Camb) 2018; 54:10160-10163. [DOI: 10.1039/c8cc05178j] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
The first general study of aminal radical cyclisations, triggered by reduction of amidines with SmI2, delivers quinazolinones with complete diastereocontrol.
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Affiliation(s)
- Huan-Ming Huang
- School of Chemistry
- Oxford Road
- University of Manchester
- Manchester
- UK
| | - Ralph W. Adams
- School of Chemistry
- Oxford Road
- University of Manchester
- Manchester
- UK
| | - David J. Procter
- School of Chemistry
- Oxford Road
- University of Manchester
- Manchester
- UK
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36
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Antonsen S, Østby RB, Stenstrøm Y. Naturally Occurring Cyclobutanes: Their Biological Significance and Synthesis. STUDIES IN NATURAL PRODUCTS CHEMISTRY 2018. [DOI: 10.1016/b978-0-444-64057-4.00001-6] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
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37
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Synthesis of Nitrogen Heterocycles Using Samarium(II) Iodide. Molecules 2017; 22:molecules22112018. [PMID: 29160806 PMCID: PMC6150357 DOI: 10.3390/molecules22112018] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/27/2017] [Revised: 11/11/2017] [Accepted: 11/13/2017] [Indexed: 11/19/2022] Open
Abstract
Nitrogen heterocycles represent vital structural motifs in biologically-active natural products and pharmaceuticals. As a result, the development of new, convenient and more efficient processes to N-heterocycles is of great interest to synthetic chemists. Samarium(II) iodide (SmI2, Kagan’s reagent) has been widely used to forge challenging C–C bonds through reductive coupling reactions. Historically, the use of SmI2 in organic synthesis has been focused on the construction of carbocycles and oxygen-containing motifs. Recently, significant advances have taken place in the use of SmI2 for the synthesis of nitrogen heterocycles, enabled in large part by the unique combination of high reducing power of this reagent (E1/2 of up to −2.8 V) with excellent chemoselectivity of the reductive umpolung cyclizations mediated by SmI2. In particular, radical cross-coupling reactions exploiting SmI2-induced selective generation of aminoketyl radicals have emerged as concise and efficient methods for constructing 2-azabicycles, pyrrolidines and complex polycyclic barbiturates. Moreover, a broad range of novel processes involving SmI2-promoted formation of aminyl radicals have been leveraged for the synthesis of complex nitrogen-containing molecular architectures by direct and tethered pathways. Applications to the synthesis of natural products have highlighted the generality of processes and the intermediates accessible with SmI2. In this review, recent advances involving the synthesis of nitrogen heterocycles using SmI2 are summarized, with a major focus on reductive coupling reactions that enable one-step construction of nitrogen-containing motifs in a highly efficient manner, while taking advantage of the spectacular selectivity of the venerable Kagan’s reagent.
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38
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Zhao B, Shi Z. Copper‐Catalyzed Intermolecular Heck‐Like Coupling of Cyclobutanone Oximes Initiated by Selective C−C Bond Cleavage. Angew Chem Int Ed Engl 2017. [DOI: 10.1002/ange.201707181] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Affiliation(s)
- Binlin Zhao
- State Key Laboratory of Coordination Chemistry School of Chemistry and Chemical Engineering Nanjing University Nanjing 210093 China
| | - Zhuangzhi Shi
- State Key Laboratory of Coordination Chemistry School of Chemistry and Chemical Engineering Nanjing University Nanjing 210093 China
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39
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Zhao B, Shi Z. Copper‐Catalyzed Intermolecular Heck‐Like Coupling of Cyclobutanone Oximes Initiated by Selective C−C Bond Cleavage. Angew Chem Int Ed Engl 2017; 56:12727-12731. [DOI: 10.1002/anie.201707181] [Citation(s) in RCA: 168] [Impact Index Per Article: 24.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/14/2017] [Indexed: 12/25/2022]
Affiliation(s)
- Binlin Zhao
- State Key Laboratory of Coordination Chemistry School of Chemistry and Chemical Engineering Nanjing University Nanjing 210093 China
| | - Zhuangzhi Shi
- State Key Laboratory of Coordination Chemistry School of Chemistry and Chemical Engineering Nanjing University Nanjing 210093 China
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40
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Reyes JR, Xu J, Kobayashi K, Bhat V, Rawal VH. Total Synthesis of (−)‐
N
‐Methylwelwitindolinone B Isothiocyanate. Angew Chem Int Ed Engl 2017; 56:9962-9966. [DOI: 10.1002/anie.201705322] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/24/2017] [Indexed: 11/06/2022]
Affiliation(s)
- Julius R. Reyes
- Department of ChemistryUniversity of Chicago 5735 South Ellis Avenue Chicago IL 60637 USA
| | - Jiasu Xu
- Department of ChemistryUniversity of Chicago 5735 South Ellis Avenue Chicago IL 60637 USA
| | - Kenichi Kobayashi
- Department of ChemistryUniversity of Chicago 5735 South Ellis Avenue Chicago IL 60637 USA
| | - Vikram Bhat
- Department of ChemistryUniversity of Chicago 5735 South Ellis Avenue Chicago IL 60637 USA
| | - Viresh H. Rawal
- Department of ChemistryUniversity of Chicago 5735 South Ellis Avenue Chicago IL 60637 USA
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41
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Reyes JR, Xu J, Kobayashi K, Bhat V, Rawal VH. Total Synthesis of (−)‐
N
‐Methylwelwitindolinone B Isothiocyanate. Angew Chem Int Ed Engl 2017. [DOI: 10.1002/ange.201705322] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Julius R. Reyes
- Department of ChemistryUniversity of Chicago 5735 South Ellis Avenue Chicago IL 60637 USA
| | - Jiasu Xu
- Department of ChemistryUniversity of Chicago 5735 South Ellis Avenue Chicago IL 60637 USA
| | - Kenichi Kobayashi
- Department of ChemistryUniversity of Chicago 5735 South Ellis Avenue Chicago IL 60637 USA
| | - Vikram Bhat
- Department of ChemistryUniversity of Chicago 5735 South Ellis Avenue Chicago IL 60637 USA
| | - Viresh H. Rawal
- Department of ChemistryUniversity of Chicago 5735 South Ellis Avenue Chicago IL 60637 USA
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42
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Lukamto DH, Gaunt MJ. Enantioselective Copper-Catalyzed Arylation-Driven Semipinacol Rearrangement of Tertiary Allylic Alcohols with Diaryliodonium Salts. J Am Chem Soc 2017. [DOI: 10.1021/jacs.7b05340] [Citation(s) in RCA: 78] [Impact Index Per Article: 11.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Affiliation(s)
- Daniel H. Lukamto
- Department of Chemistry, University of Cambridge, Lensfield Road, Cambridge CB2 1EW, United Kingdom
| | - Matthew J. Gaunt
- Department of Chemistry, University of Cambridge, Lensfield Road, Cambridge CB2 1EW, United Kingdom
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43
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Park J, Kim DH, Das T, Cho CG. Intramolecular Fischer Indole Synthesis for the Direct Synthesis of 3,4-Fused Tricyclic Indole and Application to the Total Synthesis of (−)-Aurantioclavine. Org Lett 2016; 18:5098-5101. [DOI: 10.1021/acs.orglett.6b02541] [Citation(s) in RCA: 40] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Jun Park
- Center
for New Directions
in Organic Synthesis, Department of Chemistry, Hanyang University, 222 Wangshimni-ro, Seongdong-gu, Seoul 04763, Korea
| | - Dong-Hyun Kim
- Center
for New Directions
in Organic Synthesis, Department of Chemistry, Hanyang University, 222 Wangshimni-ro, Seongdong-gu, Seoul 04763, Korea
| | - Tapas Das
- Center
for New Directions
in Organic Synthesis, Department of Chemistry, Hanyang University, 222 Wangshimni-ro, Seongdong-gu, Seoul 04763, Korea
| | - Cheon-Gyu Cho
- Center
for New Directions
in Organic Synthesis, Department of Chemistry, Hanyang University, 222 Wangshimni-ro, Seongdong-gu, Seoul 04763, Korea
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44
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Foley C, Shaw A, Hulme C. Two-Step Route to Diverse N-Functionalized Peptidomimetic-like Isatins through an Oxidation/Intramolecular Oxidative-Amidation Cascade of Ugi Azide and Ugi Three-Component Reaction Products. Org Lett 2016; 18:4904-4907. [DOI: 10.1021/acs.orglett.6b02383] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Affiliation(s)
- Christopher Foley
- Department of Chemistry
and Biochemistry, College of Science and ‡Department of Pharmacology
and Toxicology, College of Pharmacy, The University of Arizona, Tucson, Arizona 85721, United States
| | - Arthur Shaw
- Department of Chemistry
and Biochemistry, College of Science and ‡Department of Pharmacology
and Toxicology, College of Pharmacy, The University of Arizona, Tucson, Arizona 85721, United States
| | - Christopher Hulme
- Department of Chemistry
and Biochemistry, College of Science and ‡Department of Pharmacology
and Toxicology, College of Pharmacy, The University of Arizona, Tucson, Arizona 85721, United States
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45
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Yang Y, Ma C, Thumar NJ, Hu W. Pd(II)/β-ICD-Cocatalyzed Asymmetric Route to Oxindole Scaffold via Cascade Reaction of Diazoacetamides and MBH-Carbonates. J Org Chem 2016; 81:8537-43. [DOI: 10.1021/acs.joc.6b01703] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Yang Yang
- Shanghai Engineering Research
Center of Molecular Therapeutics and New Drug Development, School
of Chemistry and Molecular Engineering, East China Normal University, Shanghai 200062, China
| | - Chaoqun Ma
- Shanghai Engineering Research
Center of Molecular Therapeutics and New Drug Development, School
of Chemistry and Molecular Engineering, East China Normal University, Shanghai 200062, China
| | - Nilesh J. Thumar
- Shanghai Engineering Research
Center of Molecular Therapeutics and New Drug Development, School
of Chemistry and Molecular Engineering, East China Normal University, Shanghai 200062, China
| | - Wenhao Hu
- Shanghai Engineering Research
Center of Molecular Therapeutics and New Drug Development, School
of Chemistry and Molecular Engineering, East China Normal University, Shanghai 200062, China
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46
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Synthesis of Quaternary 3,3-Disubstituted 2-Oxindoles from 2-Substituted Indole Using Selectfluor. Org Lett 2016; 18:3154-7. [DOI: 10.1021/acs.orglett.6b01367] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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47
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Chung WJ, Vanderwal CD. Stereoselective Halogenation in Natural Product Synthesis. Angew Chem Int Ed Engl 2016; 55:4396-434. [PMID: 26833878 PMCID: PMC6028003 DOI: 10.1002/anie.201506388] [Citation(s) in RCA: 197] [Impact Index Per Article: 24.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/10/2015] [Revised: 08/27/2015] [Indexed: 01/23/2023]
Abstract
At last count, nearly 5000 halogenated natural products have been discovered. In approximately half of these compounds, the carbon atom to which the halogen is bound is sp(3) -hybridized; therefore, there are an enormous number of natural products for which stereocontrolled halogenation must be a critical component of any synthesis strategy. In this Review, we critically discuss the methods and strategies used for stereoselective introduction of halogen atoms in the context of natural product synthesis. Using the successes of the past, we also attempt to identify gaps in our synthesis technology that would aid the synthesis of halogenated natural products, as well as existing methods that have not yet seen application in complex molecule synthesis. The chemistry described herein demonstrates yet again how natural products continue to provide the inspiration for critical advances in chemical synthesis.
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Affiliation(s)
- Won-jin Chung
- Department of Chemistry, Gwangju Institute of Science and Technology, Gwangju, South Korea.
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48
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Chung WJ, Vanderwal CD. Stereoselektive Halogenierungen in der Naturstoffsynthese. Angew Chem Int Ed Engl 2016. [DOI: 10.1002/ange.201506388] [Citation(s) in RCA: 52] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Affiliation(s)
- Won-jin Chung
- Department of Chemistry; Gwangju Institute of Science and Technology; Gwangju Südkorea
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49
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Cerisoli L, Lombardo M, Trombini C, Quintavalla A. The First Enantioselective Organocatalytic Synthesis of 3-Spiro-α-Alkylidene-γ-Butyrolactone Oxindoles. Chemistry 2016; 22:3865-72. [DOI: 10.1002/chem.201504157] [Citation(s) in RCA: 36] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/15/2015] [Indexed: 01/04/2023]
Affiliation(s)
- Lucia Cerisoli
- Department of Chemistry ''G. Ciamician''; Alma Mater Studiorum; University of Bologna; Via Selmi 2 40126 Bologna Italy
| | - Marco Lombardo
- Department of Chemistry ''G. Ciamician''; Alma Mater Studiorum; University of Bologna; Via Selmi 2 40126 Bologna Italy
| | - Claudio Trombini
- Department of Chemistry ''G. Ciamician''; Alma Mater Studiorum; University of Bologna; Via Selmi 2 40126 Bologna Italy
| | - Arianna Quintavalla
- Department of Chemistry ''G. Ciamician''; Alma Mater Studiorum; University of Bologna; Via Selmi 2 40126 Bologna Italy
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50
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Li Y, Feng C, Shi H, Xu X. Diastereoselective Synthesis of 3,4-Benzomorphan Derivatives via Tandem [5 + 1]/Hemiaminalization of (2-Aminoaryl)divinyl Ketones. Org Lett 2016; 18:324-7. [DOI: 10.1021/acs.orglett.5b03506] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
Affiliation(s)
- Yifei Li
- Department
of Chemistry, Northeast Normal University, Changchun 130024, China
| | - Chengjie Feng
- Department
of Chemistry, Northeast Normal University, Changchun 130024, China
| | - Hui Shi
- Department
of Chemistry, Northeast Normal University, Changchun 130024, China
| | - Xianxiu Xu
- Department
of Chemistry, Northeast Normal University, Changchun 130024, China
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