1
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Martínez de Sarasa Buchaca M, Gaona MA, Sánchez-Barba LF, Garcés A, Rodríguez AM, Rodríguez-Diéguez A, de la Cruz-Martínez F, Castro-Osma JA, Lara-Sánchez A. Zinc-Catalyzed Cyclization of Alkynyl Derivatives: Substrate Scope and Mechanistic Insights. Inorg Chem 2024; 63:13875-13885. [PMID: 39011646 PMCID: PMC11289758 DOI: 10.1021/acs.inorgchem.4c00832] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2024] [Revised: 07/04/2024] [Accepted: 07/05/2024] [Indexed: 07/17/2024]
Abstract
Novel alkyl zinc complexes supported by acetamidate/thioacetamidate heteroscorpionate ligands have been successfully synthesized and characterized. These complexes exhibited different coordination modes depending on the electronic and steric effects of the acetamidate/thioacetamidate moiety. Their catalytic activity has been tested toward the hydroelementation reactions of alkynyl alcohol/acid substrates, affording the corresponding enol ether/unsaturated lactone products under mild reaction conditions. Kinetic studies have been performed and confirmed that reactions are first-order in [catalyst] and zero-order in [alkynyl substrate]. DFT calculations supported a reaction mechanism through the formation of the catalytically active species, an alkoxide-zinc intermediate, by a protonolysis reaction of the Zn-alkyl bond with the alcohol group of the substrate. Based on the experimental and theoretical results, a catalytic cycle has been proposed.
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Affiliation(s)
- Marc Martínez de Sarasa Buchaca
- Universidad
de Castilla-La Mancha, Departamento de Química Inorgánica,
Orgánica y Bioquímica-Centro de Innovación en
Química Avanzada (ORFEO−CINQA), Facultad de Ciencias
y Tecnologías Químicas, Instituto
Regional de Investigación Científica Aplicada-IRICA, Ciudad Real 13071, Spain
| | - Miguel A. Gaona
- Universidad
de Castilla-La Mancha, Departamento de Química Inorgánica,
Orgánica y Bioquímica-Centro de Innovación en
Química Avanzada (ORFEO−CINQA), Facultad de Ciencias
y Tecnologías Químicas, Instituto
Regional de Investigación Científica Aplicada-IRICA, Ciudad Real 13071, Spain
| | - Luis F. Sánchez-Barba
- Departamento
de Biología y Geología, Física y Química
Inorgánica, Universidad Rey Juan
Carlos, Móstoles 28933, Spain
| | - Andrés Garcés
- Departamento
de Biología y Geología, Física y Química
Inorgánica, Universidad Rey Juan
Carlos, Móstoles 28933, Spain
| | - Ana M. Rodríguez
- Universidad
de Castilla-La Mancha, Departamento de Química Inorgánica,
Orgánica y Bioquímica-Centro de Innovación en
Química Avanzada (ORFEO−CINQA), Facultad de Ciencias
y Tecnologías Químicas, Instituto
Regional de Investigación Científica Aplicada-IRICA, Ciudad Real 13071, Spain
| | - Antonio Rodríguez-Diéguez
- Departamento
de Química Inorgánica, Facultad de Ciencias, Universidad de Granada, Granada 18071, Spain
| | - Felipe de la Cruz-Martínez
- Departamento
de Química Inorgánica, Orgánica y Bioquímica-Centro
de Innovación en Química Avanzada (ORFEO−CINQA),
Facultad de Farmacia, Universidad de Castilla-La
Mancha, Albacete 02071, Spain
| | - José A. Castro-Osma
- Departamento
de Química Inorgánica, Orgánica y Bioquímica-Centro
de Innovación en Química Avanzada (ORFEO−CINQA),
Facultad de Farmacia, Universidad de Castilla-La
Mancha, Albacete 02071, Spain
| | - Agustín Lara-Sánchez
- Universidad
de Castilla-La Mancha, Departamento de Química Inorgánica,
Orgánica y Bioquímica-Centro de Innovación en
Química Avanzada (ORFEO−CINQA), Facultad de Ciencias
y Tecnologías Químicas, Instituto
Regional de Investigación Científica Aplicada-IRICA, Ciudad Real 13071, Spain
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2
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Wu F, Chang J, Bai D. Synthesis of Sterically Hindered Dialkyl Ethers via Palladium-Catalyzed Fluoro-alkoxylation of gem-Difluoroalkenes. Org Lett 2024; 26:4953-4957. [PMID: 38815137 DOI: 10.1021/acs.orglett.4c01541] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/01/2024]
Abstract
Organofluorine compounds are of high value in medicinal and agricultural chemistry. Herein, we report a palladium-catalyzed fluoro-alkoxylation of gem-difluoroalkenes for the synthesis of much more challenging sterically hindered ethers. This reaction represents a direct synthesis method for α-trifluoromethyl ethers with a broad functional group tolerance and excellent regioselectivity. This system employs N-fluorobenzenesulfonimide (NFSI) as an electrophilic fluorine source and alcohols as nucleophilic donors, including but not limited to sterically hindered tert-substituted alcohols.
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Affiliation(s)
- Fen Wu
- State Key Laboratory of Antiviral Drugs, NMPA Key Laboratory for Research and Evaluation of Innovative Drug, School of Chemistry and Chemical Engineering, Pingyuan Laboratory, Henan Normal University, Xinxiang, Henan 453007, China
| | - Junbiao Chang
- State Key Laboratory of Antiviral Drugs, NMPA Key Laboratory for Research and Evaluation of Innovative Drug, School of Chemistry and Chemical Engineering, Pingyuan Laboratory, Henan Normal University, Xinxiang, Henan 453007, China
| | - Dachang Bai
- State Key Laboratory of Antiviral Drugs, NMPA Key Laboratory for Research and Evaluation of Innovative Drug, School of Chemistry and Chemical Engineering, Pingyuan Laboratory, Henan Normal University, Xinxiang, Henan 453007, China
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3
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Adhikari AS, Majumdar N. Unconventional Reactivity of a Grubbs Catalyst: Hydroalkylation Overriding Metathesis. Org Lett 2023. [PMID: 38029292 DOI: 10.1021/acs.orglett.3c03456] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2023]
Abstract
Unprecedented reactivity of a Grubbs catalyst has been disclosed in a reaction between vinyl azaarenes and alkenylnitriles under standard metathesis conditions. No metathesis was observed; only hydroalkylation products were obtained in high yields. The practical utility of this method has been demonstrated by the application of the products in useful transformations, e.g., the formation of cyclic iminoesters and highly challenging medium-sized carbocycles.
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Affiliation(s)
- Amit Singh Adhikari
- Medicinal and Process Chemistry Division, Central Drug Research Institute (CSIR), Sector 10, Jankipuram Extension, Sitapur Road, P.O. Box 173, Lucknow, Uttar Pradesh 226031, India
| | - Nilanjana Majumdar
- Medicinal and Process Chemistry Division, Central Drug Research Institute (CSIR), Sector 10, Jankipuram Extension, Sitapur Road, P.O. Box 173, Lucknow, Uttar Pradesh 226031, India
- Academy of Scientific and Innovative Research (AcSIR), Ghaziabad, Uttar Pradesh 201002, India
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4
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Metal-Catalyzed Cascade Reactions between Alkynoic Acids and Dinucleophiles: A Review. Catalysts 2023. [DOI: 10.3390/catal13030495] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/06/2023] Open
Abstract
Cascade reactions provide a straightforward access to many valuable compounds and reduce considerably the number of steps of a synthetic sequence. Among the domino and multicomponent processes that involve alkynes, the cascade reaction between alkynoic acids and C-, N-, O- and S-aminonucleophiles stands out as a particularly powerful tool for the one-pot construction of libraries of nitrogen-containing heterocyclic compounds with scaffold diversity and molecular complexity. This reaction, based on an initial metal-catalyzed cycloisomerization that generates an alkylidene lactone intermediate, was originally catalyzed by gold(I) catalysts, along with silver salts or Brönsted acid additives, but other alternative metal catalysts have emerged in the last decade as well as different reaction media. This review examines the existing literature on the topic of metal-catalyzed cascade reactions of acetylenic acids and dinucleophiles and discusses aspects concerning substrate/catalyst ratio for every catalyst system, nature of the aminonucleophile involved and substrate scope. In addition, alternative solvents are also considered, and an insight into the pathway of the reaction and possible intermediates is also provided.
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5
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Li Q, Wang Z, Dong VM, Yang XH. Enantioselective Hydroalkoxylation of 1,3-Dienes via Ni-Catalysis. J Am Chem Soc 2023; 145:3909-3914. [PMID: 36763788 PMCID: PMC9951252 DOI: 10.1021/jacs.2c12779] [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: 12/01/2022] [Indexed: 02/12/2023]
Abstract
As an advance in hydrofunctionalization, we herein report that alcohols add to 1,3-dienes with high regio- and enantioselectivity. Using Ni-DuPhos, we access enantioenriched allylic ethers. Through the choice of solvent-free conditions, we control the reversibility of C-O bond formation. This work showcases a rare example of methanol as a reagent in asymmetric synthesis.
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Affiliation(s)
- Qi Li
- Advanced
Research Institute of Multidisciplinary Science, School of Chemistry
and Chemical Engineering, Key Laboratory of Medical Molecule Science
and Pharmaceutical Engineering, Ministry of Industry and Information
Technology, Beijing Institute of Technology, Beijing 100081, P. R. China
| | - Zhen Wang
- Advanced
Research Institute of Multidisciplinary Science, School of Chemistry
and Chemical Engineering, Key Laboratory of Medical Molecule Science
and Pharmaceutical Engineering, Ministry of Industry and Information
Technology, Beijing Institute of Technology, Beijing 100081, P. R. China
| | - Vy M. Dong
- Department
of Chemistry, University of California−Irvine, Irvine, California 92697, United States
| | - Xiao-Hui Yang
- Advanced
Research Institute of Multidisciplinary Science, School of Chemistry
and Chemical Engineering, Key Laboratory of Medical Molecule Science
and Pharmaceutical Engineering, Ministry of Industry and Information
Technology, Beijing Institute of Technology, Beijing 100081, P. R. China
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6
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Pérez-Guevara R, Sarandeses LA, Martínez MM, Pérez Sestelo J. Indium-catalyzed synthesis of benzannulated spiroketals by intramolecular double hydroalkoxylation of ortho-(hydroxyalkynyl)benzyl alcohols. Org Chem Front 2022. [DOI: 10.1039/d2qo01600a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
The novel indium-catalyzed synthesis of benzannulated spiroketals by a double intramolecular hydroalkoxylation reaction of o-(hydroxyalkynyl)benzyl alcohols is reported.
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Affiliation(s)
- Raquel Pérez-Guevara
- CICA – Centro Interdisciplinar de Química e Bioloxía and Departamento de Química, Universidade da Coruña, E-15071 A Coruña, Spain
| | - Luis A. Sarandeses
- CICA – Centro Interdisciplinar de Química e Bioloxía and Departamento de Química, Universidade da Coruña, E-15071 A Coruña, Spain
| | - M. Montserrat Martínez
- CICA – Centro Interdisciplinar de Química e Bioloxía and Departamento de Química, Universidade da Coruña, E-15071 A Coruña, Spain
| | - José Pérez Sestelo
- CICA – Centro Interdisciplinar de Química e Bioloxía and Departamento de Química, Universidade da Coruña, E-15071 A Coruña, Spain
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7
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Nanda SK, Mallik R. Transition Metal-Catalyzed Hydroalkoxylation of Alkynes: An Overview. Chemistry 2021; 27:15571-15604. [PMID: 34343374 DOI: 10.1002/chem.202102194] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/19/2021] [Indexed: 01/12/2023]
Abstract
Oxygen-bearing motifs, mainly the congener heterocycles are ubiquitous due to their presence in various natural products and bioactive scaffolds. Although in literature, several strategies have been developed for their synthesis, hydroalkoxylation of alkynes has come forward as a method of choice and has been used extensively. In particular, hydroalkoxylation of alkynes has gained enormous attention from the synthetic community due to the rapid access to a very useful and reactive synthetic intermediate like 'enol ether'. Furthermore, to manifold the utility of these methods, reports have been developed elaborating the generation of 'enol ether' using hydroalkoxylation and their usage in various reactions in cascade or tandem manner. This review focuses on recent development on the hydroalkoxylation of alkynes for the synthesis of oxygen-containing entities.
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Affiliation(s)
- Santosh K Nanda
- Department of Chemistry, School of Applied Science, Centurion University of Technology and Management Paralakhemundi, Odisha, 761211, India
| | - Rosy Mallik
- Department of Chemistry, School of Applied Science, Centurion University of Technology and Management Paralakhemundi, Odisha, 761211, India
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8
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Affiliation(s)
- Santosh K. Nanda
- Department of chemistry School of Applied Science Centurion University of Technology and Management Paralakhemundi Odisha 761211 India
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9
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Nishimura K, Hanzawa R, Sugai T, Fuwa H. Ruthenium-Catalyzed Intramolecular Double Hydrofunctionalization of Alkynes. Synthesis of Spirocyclic Hemiaminal Ethers and Their Lewis Acid-Mediated Cleavage/Nucleophilic Addition. J Org Chem 2021; 86:6674-6697. [PMID: 33861607 DOI: 10.1021/acs.joc.1c00443] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
[RuCl2(p-cymene)]2/AgNO3-catalyzed intramolecular double hydrofunctionalization of internal alkynes having nitrogen and oxygen nucleophilic groups at appropriate positions provided a series of spirocyclic hemiaminal ether derivatives in good to excellent yields. The product spiro-hemiaminal ethers underwent Lewis acid-mediated chemoselective cleavage, and in situ-generated iminium/oxocarbenium ions could be trapped with nucleophiles to afford a range of nitrogen and oxygen heterocycles.
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Affiliation(s)
- Kazuma Nishimura
- Department of Applied Chemistry, Faculty of Science and Engineering, Chuo University, 1-13-27 Kasuga, Bunkyo-ku, Tokyo 112-8551, Japan
| | - Ryohei Hanzawa
- Department of Applied Chemistry, Faculty of Science and Engineering, Chuo University, 1-13-27 Kasuga, Bunkyo-ku, Tokyo 112-8551, Japan
| | - Tomoya Sugai
- Department of Applied Chemistry, Faculty of Science and Engineering, Chuo University, 1-13-27 Kasuga, Bunkyo-ku, Tokyo 112-8551, Japan
| | - Haruhiko Fuwa
- Department of Applied Chemistry, Faculty of Science and Engineering, Chuo University, 1-13-27 Kasuga, Bunkyo-ku, Tokyo 112-8551, Japan
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10
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Yang C, Liu Z, Hu X, Xie H, Jiang H, Zeng W. Rh( iii)-Catalyzed Csp 2–Csp 3 bond alkoxylation of α-indolyl alcohols via C–C σ bond cleavage. Org Chem Front 2021. [DOI: 10.1039/d1qo00194a] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Abstract
A Rh(iii)-catalyzed direct Csp2–Csp3 bond alkoxylation of α-(2-indolyl)alcohols with alcohols has been achieved via C–C sigma bond/C–O single bond switch.
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Affiliation(s)
- Can Yang
- Key Laboratory of Functional Molecular Engineering of Guangdong Province
- School of Chemistry and Chemical Engineering
- South China University of Technology
- Guangzhou 510641
- China
| | - Zhipeng Liu
- Key Laboratory of Functional Molecular Engineering of Guangdong Province
- School of Chemistry and Chemical Engineering
- South China University of Technology
- Guangzhou 510641
- China
| | - Xinwei Hu
- Key Laboratory of Functional Molecular Engineering of Guangdong Province
- School of Chemistry and Chemical Engineering
- South China University of Technology
- Guangzhou 510641
- China
| | - Haisheng Xie
- Key Laboratory of Functional Molecular Engineering of Guangdong Province
- School of Chemistry and Chemical Engineering
- South China University of Technology
- Guangzhou 510641
- China
| | - Huanfeng Jiang
- Key Laboratory of Functional Molecular Engineering of Guangdong Province
- School of Chemistry and Chemical Engineering
- South China University of Technology
- Guangzhou 510641
- China
| | - Wei Zeng
- Key Laboratory of Functional Molecular Engineering of Guangdong Province
- School of Chemistry and Chemical Engineering
- South China University of Technology
- Guangzhou 510641
- China
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11
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Brodzka A, Koszelewski D, Ostaszewski R. Dual Activity of Grubbs-Type Catalyst in the Transvinylation of Carboxylic Acids and Ring-Closing Metathesis Reactions. J Org Chem 2020; 85:15305-15313. [PMID: 33196209 PMCID: PMC7735734 DOI: 10.1021/acs.joc.0c02135] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/04/2020] [Indexed: 11/30/2022]
Abstract
The development of a multifunctional catalyst, which mimics the promiscuity of enzymes, that would catalyze more than one chemical transformation in a single reaction vessel is one of the key points of modern sustainable chemistry. The results of our experiments indicated that Grubbs-type catalysts possess such multitask activity, catalyzing the transvinylation reaction of carboxylic acids without losing their original metathetic activity. This new activity of Grubbs catalysts was evidenced on several examples. It allows us to design a transvinylation/ring-closing metathesis (RCM) cascade reaction leading to the formation of endocyclic enol lactones from unsaturated carboxylic acids in an one-pot procedure. This unique ability of Grubbs catalyst to catalyze multiple mechanically distinct cascade reactions in a chemoselective way offers the new possibility for the synthesis of complex compounds from simple, easily accessible substrates.
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Affiliation(s)
- Anna Brodzka
- Institute of Organic Chemistry
Polish Academy of Sciences, Kasprzaka 44/52, 01-224 Warszawa, Poland
| | - Dominik Koszelewski
- Institute of Organic Chemistry
Polish Academy of Sciences, Kasprzaka 44/52, 01-224 Warszawa, Poland
| | - Ryszard Ostaszewski
- Institute of Organic Chemistry
Polish Academy of Sciences, Kasprzaka 44/52, 01-224 Warszawa, Poland
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12
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Kong XF, Guo XY, Gu ZY, Wei LS, Liu LL, Mo DL, Pan CX, Su GF. Silver(i)-catalyzed selective hydroalkoxylation of C2-alkynyl quinazolinones to synthesize quinazolinone-fused eight-membered N,O-heterocycles. Org Chem Front 2020. [DOI: 10.1039/d0qo00437e] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
Abstract
A silver-catalyzed selective 8-endo-dig cyclization of C2-alkynyl quinazolinones was developed to prepare a series of novel quinazolinone-fused eight-membered N,O-heterocycles in good-to-excellent yields under mild reaction conditions.
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Affiliation(s)
- Xiang-Fei Kong
- State key laboratory for Chemistry and Molecular Engineering of Medicinal Resources
- Ministry of Science and Technology of China; School of Chemistry and Pharmaceutical Sciences
- Guangxi Normal University
- Guilin
- China
| | - Xiu-Yun Guo
- State key laboratory for Chemistry and Molecular Engineering of Medicinal Resources
- Ministry of Science and Technology of China; School of Chemistry and Pharmaceutical Sciences
- Guangxi Normal University
- Guilin
- China
| | - Zi-Yu Gu
- State key laboratory for Chemistry and Molecular Engineering of Medicinal Resources
- Ministry of Science and Technology of China; School of Chemistry and Pharmaceutical Sciences
- Guangxi Normal University
- Guilin
- China
| | - Lin-Su Wei
- State key laboratory for Chemistry and Molecular Engineering of Medicinal Resources
- Ministry of Science and Technology of China; School of Chemistry and Pharmaceutical Sciences
- Guangxi Normal University
- Guilin
- China
| | - Lu-Lu Liu
- State key laboratory for Chemistry and Molecular Engineering of Medicinal Resources
- Ministry of Science and Technology of China; School of Chemistry and Pharmaceutical Sciences
- Guangxi Normal University
- Guilin
- China
| | - Dong-Liang Mo
- State key laboratory for Chemistry and Molecular Engineering of Medicinal Resources
- Ministry of Science and Technology of China; School of Chemistry and Pharmaceutical Sciences
- Guangxi Normal University
- Guilin
- China
| | - Cheng-Xue Pan
- State key laboratory for Chemistry and Molecular Engineering of Medicinal Resources
- Ministry of Science and Technology of China; School of Chemistry and Pharmaceutical Sciences
- Guangxi Normal University
- Guilin
- China
| | - Gui-Fa Su
- State key laboratory for Chemistry and Molecular Engineering of Medicinal Resources
- Ministry of Science and Technology of China; School of Chemistry and Pharmaceutical Sciences
- Guangxi Normal University
- Guilin
- China
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13
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Králová P, Maloň M, Pospíšil J, Soural M. Rearrangement of Threonine- and Serine-Based N-(3-Phenylprop-2-yn-1-yl) Sulfonamides Yields Chiral Pyrrolidin-3-ones. J Org Chem 2019; 85:985-993. [DOI: 10.1021/acs.joc.9b02932] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Affiliation(s)
- Petra Králová
- Department of Organic Chemistry, Faculty of Science, Palacký University, Tr. 17 Listopadu 12, 771 46 Olomouc, Czech Republic
| | - Michal Maloň
- JEOL (United Kingdom) Limited, JEOL House, Silver Court, Watchmead, Welwyn Garden City, AL7 1LT Hertfordshire, United Kingdom
| | - Jiří Pospíšil
- Department of Organic Chemistry, Faculty of Science, Palacký University, Tr. 17 Listopadu 12, 771 46 Olomouc, Czech Republic
- Laboratory of Growth Regulators, The Czech Academy of Sciences, Institute of Experimental Botany & Palacký University, Šlechtitelů 27, 78371 Olomouc, Czech Republic
| | - Miroslav Soural
- Department of Organic Chemistry, Faculty of Science, Palacký University, Tr. 17 Listopadu 12, 771 46 Olomouc, Czech Republic
- Institute of Molecular and Translational Medicine, Faculty of Medicine and Dentistry, Palacký University, Hněvotínská 5, 779 00 Olomouc, Czech Republic
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14
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Herndon JW. The chemistry of the carbon-transition metal double and triple bond: Annual survey covering the year 2018. Coord Chem Rev 2019. [DOI: 10.1016/j.ccr.2019.213051] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
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15
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Taleb A, Lahrech M, Hacini S, Thibonnet J, Parrain J. RCM
vs
Oxacycloisomerization through Divergent Reactivity of Dienyl‐ or Ynenylcycloalkanols using Grubbs Catalyst: an Access to Carbobicycles and Fused Bicyclic Dihydrofurans. ChemistrySelect 2019. [DOI: 10.1002/slct.201902783] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Assya Taleb
- Laboratoire de Chimie FineFSEAUniversité Oran1, B.P-1524 Menouar 31000 Oran Algérie
| | - Mokhtar Lahrech
- Laboratoire de Chimie Organique et de Substances Naturelles (LCOSNa)Université de Djelfa Algérie
| | - Salih Hacini
- Laboratoire de Chimie FineFSEAUniversité Oran1, B.P-1524 Menouar 31000 Oran Algérie
| | - Jerome Thibonnet
- Laboratoire SIMBA EA 7502Département de Chimie, 32 Av. MongeUniversité de Tours 37200 Tours France
| | - Jean‐Luc Parrain
- Aix-Marseille UniversitéCNRSCentrale Marseille, iSm2, Marseille France
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16
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Wu C, Yang X, Shang Y, Cheng HG, Yan W, Zhou Q. Synthesis of Benzofused Dioxabicycle Scaffolds via a Catellani Strategy. Org Lett 2019; 21:8938-8942. [PMID: 31670522 DOI: 10.1021/acs.orglett.9b03228] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Reported is a modular strategy for the preparation of the unique benzofused dioxabicycle scaffolds involving a Catellani reaction of aryl iodides, epoxides, and terminal alkynes and an oxa-cyclization. This is a mild, scalable, chemoselective, and atom-economical protocol, compatible with various functionalized aryl iodides, epoxides, and terminal alkynes. With the ability to build up the molecular complexity rapidly and efficiently from feedstock chemicals, this method will have wide applications in organic synthesis.
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Affiliation(s)
- Chenggui Wu
- Sauvage Center for Molecular Sciences, Engineering Research Center of Organosilicon Compounds & Materials (Ministry of Education), College of Chemistry and Molecular Sciences , Wuhan University , 430072 Wuhan , China
| | - Xinjun Yang
- Sauvage Center for Molecular Sciences, Engineering Research Center of Organosilicon Compounds & Materials (Ministry of Education), College of Chemistry and Molecular Sciences , Wuhan University , 430072 Wuhan , China
| | - Yong Shang
- Sauvage Center for Molecular Sciences, Engineering Research Center of Organosilicon Compounds & Materials (Ministry of Education), College of Chemistry and Molecular Sciences , Wuhan University , 430072 Wuhan , China
| | - Hong-Gang Cheng
- Sauvage Center for Molecular Sciences, Engineering Research Center of Organosilicon Compounds & Materials (Ministry of Education), College of Chemistry and Molecular Sciences , Wuhan University , 430072 Wuhan , China
| | - Wei Yan
- Sauvage Center for Molecular Sciences, Engineering Research Center of Organosilicon Compounds & Materials (Ministry of Education), College of Chemistry and Molecular Sciences , Wuhan University , 430072 Wuhan , China
| | - Qianghui Zhou
- Sauvage Center for Molecular Sciences, Engineering Research Center of Organosilicon Compounds & Materials (Ministry of Education), College of Chemistry and Molecular Sciences , Wuhan University , 430072 Wuhan , China.,Institute for Advanced Studies , Wuhan University , 430072 Wuhan , China
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17
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He C, Cai J, Zheng Y, Pei C, Qiu L, Xu X. Gold-Catalyzed Hydroalkoxylation/Povarov Reaction Cascade of Alkynols with N-Aryl Imines: Synthesis of Tetrahydroquinolines. ACS OMEGA 2019; 4:15754-15763. [PMID: 31572879 PMCID: PMC6761745 DOI: 10.1021/acsomega.9b02693] [Citation(s) in RCA: 21] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/20/2019] [Accepted: 08/27/2019] [Indexed: 05/10/2023]
Abstract
A one-pot gold-catalyzed hydroalkoxylation/Povarov reaction cascade of alkynols with N-aryl imines or in situ generated iminium has been developed. The protocol provides a facile access to a series of fused tricyclic tetrahydroquinolines with a broad substrate scope using readily available materials under mild conditions. The unique mechanistic feature is the dual function of the gold catalyst, which first catalyzed the intramolecular hydroalkoxylation of alkynols, and upon the formation of dihydrofuran species, promoted the following Povarov reaction with high stereoselectivity.
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Affiliation(s)
- Ciwang He
- Key
Laboratory of Organic Synthesis of Jiangsu Province, College of Chemistry,
Chemical Engineering and Materials Science, Soochow University, Suzhou 215123, China
| | - Ju Cai
- Key
Laboratory of Organic Synthesis of Jiangsu Province, College of Chemistry,
Chemical Engineering and Materials Science, Soochow University, Suzhou 215123, China
| | - Yang Zheng
- Key
Laboratory of Organic Synthesis of Jiangsu Province, College of Chemistry,
Chemical Engineering and Materials Science, Soochow University, Suzhou 215123, China
| | - Chao Pei
- Key
Laboratory of Organic Synthesis of Jiangsu Province, College of Chemistry,
Chemical Engineering and Materials Science, Soochow University, Suzhou 215123, China
| | - Lihua Qiu
- Key
Laboratory of Organic Synthesis of Jiangsu Province, College of Chemistry,
Chemical Engineering and Materials Science, Soochow University, Suzhou 215123, China
| | - Xinfang Xu
- Key
Laboratory of Organic Synthesis of Jiangsu Province, College of Chemistry,
Chemical Engineering and Materials Science, Soochow University, Suzhou 215123, China
- Guangdong
Key Laboratory of Chiral Molecule and Drug Discovery, School of Pharmaceutical
Sciences, Sun Yat-sen University, Guangzhou 510006, China
- Shanghai
Engineering Research Center of Molecular Therapeutics and New Drug
Development, School of Chemistry and Molecular Engineering, East China Normal University, 3663 North Zhongshan Road, Shanghai 200062, China
- E-mail:
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Gatus MRD, Pernik I, Tompsett JA, Binding SC, Peterson MB, Messerle BA. Simple and reactive Ir(i) N-heterocyclic carbene complexes for alkyne activation. Dalton Trans 2019; 48:4333-4340. [PMID: 30860538 DOI: 10.1039/c9dt00313d] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
Two simple unsymmetrical monometallic Ir(i) complexes with an N-heterocyclic carbene ligand and an analogous bimetallic Ir(i) complex were synthesised. These complexes were found to be extremely active catalysts for a range of C-X (X = N or O) and Si-N bond forming reactions involving alkyne and imine activation for dihydroalkoxylation, hydroamination and hydrosilylation reactions. These catalysts exhibited reaction rates far exceeding those of other Rh(i) and Ir(i) complexes previously reported. In addition, a small change to the ligand design (phenyl vs. mesityl) substantially affected both the reactivity and product selectivity of the catalyst. The Ir(i) complex bearing a mesitylene wingtip provided unprecedented regioselectivity in the dihydroalkoxylation reaction and a new kinetic product from the typical hydrosilylation protocol of 2-benyzlpyrroline to produce an N-silylaminoalkene. Our mechanistic studies indicated that this transformation proceeded via a dehydrogenative coupling mechanism.
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Affiliation(s)
- Mark R D Gatus
- Department of Molecular Sciences, Macquarie University, North Ryde, NSW 2109, Australia.
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