1
|
Fan F, Peng Y, Zhang X, Wang S, Luo Z, Luo M, Zeng X. Metal-carbene-guided twofold cross-coupling of ethers with chromium catalysis. Nat Commun 2024; 15:6455. [PMID: 39085244 PMCID: PMC11292013 DOI: 10.1038/s41467-024-50675-5] [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: 03/01/2024] [Accepted: 07/18/2024] [Indexed: 08/02/2024] Open
Abstract
Coupling by metal-carbene transfer enables the formation of several different bonds at the carbenoid site, enabling prochiral Csp3 centers that are fundamental three-dimensional substructures for medicines to be forged with increased efficiency. However, strategies using bulk chemicals are rare because of the challenge of breaking two unactivated geminal bonds. Herein, we report the reactivity of ethers to form metal-carbene intermediate by cleavage of α-Csp3-H/Csp3-O bonds, which achieve selective coupling with arylmagnesium bromides and chlorosilanes. These couplings are catalysed by cyclic (alkyl)(amino)carbene-chromium complex and enable the one-step formation of 1,n-arylsilyl alcohols and α-arylated silanes. Mechanistic studies indicate that the in-situ formed low-valent Cr might react with iodobenzene to form phenyl radical species, which abstracts the α-H atom of ether in giving α-oxy radical. The latter combines with Cr by breaking α-Csp3-O bond to afford metal-carbene intermediate, which couples with aryl Grignard and chlorosilane to form two σ-bonds.
Collapse
Affiliation(s)
- Fei Fan
- Key Laboratory of Green Chemistry & Technology, Ministry of Education, College of Chemistry, Sichuan University, Chengdu, 610064, China
| | - Yong Peng
- Key Laboratory of Green Chemistry & Technology, Ministry of Education, College of Chemistry, Sichuan University, Chengdu, 610064, China
| | - Xiaoyu Zhang
- Key Laboratory of Green Chemistry & Technology, Ministry of Education, College of Chemistry, Sichuan University, Chengdu, 610064, China
| | - Sha Wang
- Key Laboratory of Green Chemistry & Technology, Ministry of Education, College of Chemistry, Sichuan University, Chengdu, 610064, China
| | - Zheng Luo
- Key Laboratory of Green Chemistry & Technology, Ministry of Education, College of Chemistry, Sichuan University, Chengdu, 610064, China
| | - Meiming Luo
- Key Laboratory of Green Chemistry & Technology, Ministry of Education, College of Chemistry, Sichuan University, Chengdu, 610064, China
| | - Xiaoming Zeng
- Key Laboratory of Green Chemistry & Technology, Ministry of Education, College of Chemistry, Sichuan University, Chengdu, 610064, China.
| |
Collapse
|
2
|
Hess SN, Fürstner A. An Efficient and Scalable "Second Generation" Total Synthesis of the Marine Polyketide Limaol Endowed with Antiparasitic Activity. Chemistry 2024; 30:e202401429. [PMID: 38716817 DOI: 10.1002/chem.202401429] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/12/2024] [Indexed: 06/20/2024]
Abstract
The cluster of four skipped exo-methylene substituents on the "northern" wing of limaol renders this dinoflagellate-derived marine natural product unique in structural terms. This arguably non-thermodynamic array gains kinetic stability by virtue of populating local conformations which impede isomerization to a partly or fully conjugated polyene. This analysis suggested that the difficulties encountered during the late stages of our first total synthesis of this polyketide had not been caused by an overly fragile character of this unusual substructure; rather, an unfavorable steric microenvironment about the spirotricyclic core was identified as the likely cause. To remedy the issue, the protecting groups on this central fragment were changed; in effect, this amendment allowed all strategic and practical problems to be addressed. As a result, the overall yield over the longest linear sequence was multiplied by a factor of almost five and the material throughput increased more than eighty-fold per run. Key-to-success was a gold-catalyzed spirocyclization reaction; the reasons why a Brønsted acid cocatalyst is needed and the origin of the excellent levels of selectivity were delineated. The change of the protecting groups also allowed for much improved fragment coupling processes; most notably, the sequence of a substrate-controlled carbonyl addition reaction followed by Mitsunobu inversion that had originally been necessary to affix the southern tail to the core could be replaced by a reagent controlled asymmetric allylation. Finally, a much-improved route to the "northern" sector was established by leveraging the power of asymmetric hydrogenation of a 2-pyrone derivative. Limaol was found to combine appreciable antiparasitic activity with very modest cytotoxicity.
Collapse
Affiliation(s)
- Stephan N Hess
- Max-Planck-Institut für Kohlenforschung, 45470, Mülheim/Ruhr, Germany
| | - Alois Fürstner
- Max-Planck-Institut für Kohlenforschung, 45470, Mülheim/Ruhr, Germany
| |
Collapse
|
3
|
Ibraheem Shelash Al-Hawary S, Saleh RO, AlBajalan AR, Fayzullaev N, Alshuhri M, Hayif Jasim Ali S, Alawadi A, Jawad MA, Alsaadi SB, Ghorayshi Nejad MS. Synthesis of N,N'-alkylidene bisamides and Suzuki-Miyaura coupling reaction derivatives with Pd organometallic catalyst anchored to channels of mesoporous silica MCM-41. Sci Rep 2024; 14:7688. [PMID: 38561414 PMCID: PMC10985085 DOI: 10.1038/s41598-024-58310-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/28/2024] [Accepted: 03/27/2024] [Indexed: 04/04/2024] Open
Abstract
At first, an organometallic catalyst namely, Pd-DPyE@MCM-41@MNP was prepared through magnetic (Fe3O4) nanoparticles-doped into channels of mesoporous silica MCM-41 and then, anchoring a novel complex composed of di(4-pyridyl)ethylene and palladium on the inner surface of the support. This immobilized catalyst was successfully identified via VSM, ICP-OES, TEM, FTIR, TGA, SEM, BET, XRD, EDX and elemental mapping analyses. After that, it was used as a versatile, heterogeneous, and magnetically reproducible catalyst in the generation of N,N'-alkylidene bisamides (1a-13a, 8-20 min, 90-98%, 50 °C, solvent-free) and Suzuki-Miyaura coupling (SMC) reaction derivatives (1b-26b, 10-140 min, 86-98%, 60 °C, PEG-400). The VSM plot of Pd-DPyE@MCM-41@MNP displays that this nanocatalyst can be easily recycled by applying an external magnetic field. In both synthetic paths, this nanocatalyst was reused at least seven times without palladium leaching and significantly reducing its catalytic performance. Also, stability and heterogeneous nature of catalyst were approved via ICP-OES technique and hot filtration test.
Collapse
Affiliation(s)
| | - Raed Obaid Saleh
- Department of Medical Laboratory Techniques, Al-Maarif University College, Al-Anbar, Iraq
| | | | - Normurot Fayzullaev
- Department of Polymer Chemistry and Chemical Technology, Samarkand State University, 140101, Samarkand, Uzbekistan
| | - Mohammed Alshuhri
- Radiology and Medical Imaging Department, College of Applied Medical Sciences, Prince Sattam Bin Abdulaziz University, 11942, Kharj, Saudi Arabia
| | - Saad Hayif Jasim Ali
- Department of Medical Laboratory, College of Health and Medical Technololgy, Al-Ayen University, Thi-Qar, Iraq
| | - Ahmed Alawadi
- College of Technical Engineering, The Islamic University, Najaf, Iraq
- College of Technical Engineering, The Islamic University of Al Diwaniyah, Al Diwaniyah, Iraq
- College of Technical Engineering, The Islamic University of Babylon, Babylon, Iraq
| | | | - Salim B Alsaadi
- Department of Pharmaceutics, Al-Hadi University College, Baghdad, 10011, Iraq
| | | |
Collapse
|
4
|
Bulger AS, Nasrallah DJ, Tena Meza A, Garg NK. Enantioselective nickel-catalyzed Mizoroki-Heck cyclizations of amide electrophiles. Chem Sci 2024; 15:2593-2600. [PMID: 38362425 PMCID: PMC10866352 DOI: 10.1039/d3sc05797f] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/30/2023] [Accepted: 01/08/2024] [Indexed: 02/17/2024] Open
Abstract
Amide cross-couplings that rely on C-N bond activation by transition metal catalysts have emerged as valuable synthetic tools. Despite numerous discoveries in this field, no catalytic asymmetric variants have been disclosed to date. Herein, we demonstrate the first such transformation, which is the Mizoroki-Heck cyclization of amide substrates using asymmetric nickel catalysis. This proof-of-concept study provides an entryway to complex enantioenriched polycyclic scaffolds and advances the field of amide C-N bond activation chemistry.
Collapse
Affiliation(s)
- Ana S Bulger
- Department of Chemistry and Biochemistry, University of California at Los Angeles Los Angeles California 90095 USA
| | - Daniel J Nasrallah
- Department of Chemistry and Biochemistry, University of California at Los Angeles Los Angeles California 90095 USA
| | - Arismel Tena Meza
- Department of Chemistry and Biochemistry, University of California at Los Angeles Los Angeles California 90095 USA
| | - Neil K Garg
- Department of Chemistry and Biochemistry, University of California at Los Angeles Los Angeles California 90095 USA
| |
Collapse
|
5
|
Imamura Y, Takaoka K, Komori Y, Nagatomo M, Inoue M. Total Synthesis of Taxol Enabled by Inter- and Intramolecular Radical Coupling Reactions. Angew Chem Int Ed Engl 2023; 62:e202219114. [PMID: 36646637 DOI: 10.1002/anie.202219114] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/26/2022] [Revised: 01/14/2023] [Accepted: 01/16/2023] [Indexed: 01/18/2023]
Abstract
Taxol is a clinically used drug for the treatment of various types of cancers. Its 6/8/6/4-membered ring (ABCD-ring) system is substituted by eight oxygen functional groups and flanked by four acyl groups, including a β-amino acid side chain. Here we report a 34-step total synthesis of this unusually oxygenated and intricately fused structure. Inter- and intramolecular radical coupling reactions connected the A- and C-ring fragments and cyclized the B-ring, respectively. Functional groups of the A- and C-rings were then efficiently decorated by employing newly developed chemo-, regio-, and stereoselective reactions. Finally, construction of the D-ring and conjugation with the β-amino acid delivered taxol. The powerful coupling reactions and functional group manipulations implemented in the present synthesis provide new valuable information for designing multistep target-oriented syntheses of diverse bioactive natural products.
Collapse
Affiliation(s)
- Yusuke Imamura
- Graduate School of Pharmaceutical Sciences, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo, 113-0033, Japan
| | - Kyohei Takaoka
- Graduate School of Pharmaceutical Sciences, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo, 113-0033, Japan
| | - Yuma Komori
- Graduate School of Pharmaceutical Sciences, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo, 113-0033, Japan
| | - Masanori Nagatomo
- Graduate School of Pharmaceutical Sciences, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo, 113-0033, Japan
| | - Masayuki Inoue
- Graduate School of Pharmaceutical Sciences, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo, 113-0033, Japan
| |
Collapse
|
6
|
Tantalum-catalyzed reaction of disubstituted acetylenes with EtAlCl2. Russ Chem Bull 2022. [DOI: 10.1007/s11172-022-3640-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
|
7
|
Peng L, Zhao Y, Yang T, Tong Z, Tang Z, Orita A, Qiu R. Zirconium-Based Catalysts in Organic Synthesis. Top Curr Chem (Cham) 2022; 380:41. [PMID: 35951161 DOI: 10.1007/s41061-022-00396-4] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2021] [Accepted: 06/07/2022] [Indexed: 11/30/2022]
Abstract
Zirconium is a silvery-white malleable and ductile metal at room temperature with a crustal abundance of 162 ppm. Its compounds, showing Lewis acidic behavior and high catalytic performance, have been recognized as a relatively cheap, low-toxicity, stable, green, and efficient catalysts for various important organic transformations. Commercially available inorganic zirconium chloride was widely applied as a catalyst to accelerate amination, Michael addition, and oxidation reactions. Well-designed zirconocene perfluorosulfonates can be applied in allylation, acylation, esterification, etc. N-Chelating oganozirconium complexes accelerate polymerization, hydroaminoalkylation, and CO2 fixation efficiently. In this review, the applications of both commercially available and synthesized zirconium catalysts in organic reactions in the last 5 years are highlighted. Firstly, the properties and application of zirconium and its compounds are simply introduced. After presenting the superiority of zirconium compounds, their applications as catalysts to accelerate organic transformations are classified and presented in detail. On the basis of different kinds of zirconium catalysts, organic reactions accelerated by inorganic zirconium catalysts, zirconium catalysts bearing Cp, and organozirconium catalysts without Cp are summarized, and the plausible reaction mechanisms are presented if available.
Collapse
Affiliation(s)
- Lifen Peng
- Key Laboratory of Theoretical Organic Chemistry and Functional Molecule of Ministry of Education, Hunan Provincial Key Laboratory of Controllable Preparation and Functional Application of Fine Polymers, School of Chemistry and Chemical Engineering, Hunan University of Science and Technology, Xiangtan, 411201, Hunan, China.,State Key Laboratory of Chemo/Biosensing and Chemometrics, Advanced Catalytic Engineering Research Center of the Ministry of Education, College of Chemistry and Chemical Engineering, Hunan University, Changsha, 410082, China.,Department of Applied Chemistry and Biotechnology, Okayama University of Science, 1-1 Ridai-cho, Kita-ku, Okayama, 700-0005, Japan
| | - Yanting Zhao
- Key Laboratory of Theoretical Organic Chemistry and Functional Molecule of Ministry of Education, Hunan Provincial Key Laboratory of Controllable Preparation and Functional Application of Fine Polymers, School of Chemistry and Chemical Engineering, Hunan University of Science and Technology, Xiangtan, 411201, Hunan, China
| | - Tianbao Yang
- State Key Laboratory of Chemo/Biosensing and Chemometrics, Advanced Catalytic Engineering Research Center of the Ministry of Education, College of Chemistry and Chemical Engineering, Hunan University, Changsha, 410082, China
| | - Zhou Tong
- State Key Laboratory of Chemo/Biosensing and Chemometrics, Advanced Catalytic Engineering Research Center of the Ministry of Education, College of Chemistry and Chemical Engineering, Hunan University, Changsha, 410082, China
| | - Zilong Tang
- Key Laboratory of Theoretical Organic Chemistry and Functional Molecule of Ministry of Education, Hunan Provincial Key Laboratory of Controllable Preparation and Functional Application of Fine Polymers, School of Chemistry and Chemical Engineering, Hunan University of Science and Technology, Xiangtan, 411201, Hunan, China.
| | - Akihiro Orita
- Department of Applied Chemistry and Biotechnology, Okayama University of Science, 1-1 Ridai-cho, Kita-ku, Okayama, 700-0005, Japan.
| | - Renhua Qiu
- State Key Laboratory of Chemo/Biosensing and Chemometrics, Advanced Catalytic Engineering Research Center of the Ministry of Education, College of Chemistry and Chemical Engineering, Hunan University, Changsha, 410082, China.
| |
Collapse
|
8
|
Adams RW, John RO, Blazina D, Eguillor B, Cockett MCR, Dunne JP, López‐Serrano J, Duckett SB. Contrasting Photochemical and Thermal Catalysis by Ruthenium Arsine Complexes Revealed by Parahydrogen Enhanced NMR Spectroscopy. Eur J Inorg Chem 2022. [DOI: 10.1002/ejic.202100991] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Ralph W. Adams
- Department of Chemistry University of York Heslington, York YO10 5DD UK
- Current address: School of Chemistry University of Manchester Manchester M13 9PL UK
| | - Richard O. John
- Department of Chemistry University of York Heslington, York YO10 5DD UK
- Current address: Department of Physics University of York Heslington, York YO10 5DD UK
| | - Damir Blazina
- Department of Chemistry University of York Heslington, York YO10 5DD UK
| | - Beatriz Eguillor
- Department of Chemistry University of York Heslington, York YO10 5DD UK
- Current address: Departamento de Química Inorgánica Instituto de Síntesis Química y Catálisis Homogénea (ISQCH) Centro de Innovación en Química Avanzada (ORFEO-CINQA) Universidad de Zaragoza – CSIC 50009 Zaragoza Spain
| | | | - John P. Dunne
- Department of Chemistry University of York Heslington, York YO10 5DD UK
| | - Joaquín López‐Serrano
- Department of Chemistry University of York Heslington, York YO10 5DD UK
- Current address: Departmento de Química Inorgánica Universidad de Sevilla 41012 Sevilla, Andalucía Spain
| | - Simon B. Duckett
- Department of Chemistry University of York Heslington, York YO10 5DD UK
| |
Collapse
|
9
|
Melot R, Saiegh TJ, Fürstner A. Regioselective trans-Hydrostannation of Boron-Capped Alkynes. Chemistry 2021; 27:17002-17011. [PMID: 34240757 PMCID: PMC9291331 DOI: 10.1002/chem.202101901] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/31/2021] [Indexed: 01/16/2023]
Abstract
Alkynyl-B(aam) (aam=anthranilamidato) derivatives are readily available bench-stable compounds that undergo remarkably selective reactions with Bu3 SnH in the presence of [Cp*RuCl]4 as the catalyst. The addition follows a stereochemically unorthodox trans-selective course; in terms of regioselectivity, the Bu3 Sn- unit is delivered with high fidelity to the C-atom of the triple bond adjacent to the boracyclic head group ("alpha,trans-addition"). This outcome is deemed to reflect a hydrogen bonding interaction between the protic -NH groups of the benzo-1,3,2-diazaborininone ring system and the polarized [Ru-Cl] bond in the loaded catalyst, which locks the substrate in place in a favorable orientation relative to the incoming reagent. The resulting isomerically (almost) pure gem-dimetalated building blocks are amenable to numerous downstream functionalizations; most remarkable is the ability to subject the -B(aam) moiety to Suzuki-Miyaura cross coupling without need for prior hydrolysis while keeping the adjacent Bu3 Sn- group intact. Alternatively, the tin residue can be engaged in selective tin/halogen exchange without touching the boron substituent; the fact that the two -NH entities of -B(aam) do not protonate organozinc reagents and hence do not interfere with Negishi reactions of the alkenyl halides thus formed is another virtue of this so far underutilized boracycle. Overall, the ruthenium catalyzed trans-hydrostannation of alkynyl-B(aam) derivatives opens a practical gateway to isomerically pure trisubstituted alkenes of many different substitution patterns by sequential functionalization of the 1-alkenyl-1,1-heterobimetallic adducts primarily formed.
Collapse
Affiliation(s)
- Romain Melot
- Max-Planck-Institut für Kohlenforschung45470Mülheim an der RuhrMülheim/RuhrGermany
| | - Tomas J. Saiegh
- Max-Planck-Institut für Kohlenforschung45470Mülheim an der RuhrMülheim/RuhrGermany
| | - Alois Fürstner
- Max-Planck-Institut für Kohlenforschung45470Mülheim an der RuhrMülheim/RuhrGermany
| |
Collapse
|
10
|
Rajabi F, Burange AS, Voskressensky LG, Luque R. Supported phosphine free bis-NHC palladium pincer complex: An efficient reusable nanocatalyst for Suzuki-Miyaura coupling reaction. MOLECULAR CATALYSIS 2021. [DOI: 10.1016/j.mcat.2021.111928] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
|
11
|
D'Alterio MC, Casals-Cruañas È, Tzouras NV, Talarico G, Nolan SP, Poater A. Mechanistic Aspects of the Palladium-Catalyzed Suzuki-Miyaura Cross-Coupling Reaction. Chemistry 2021; 27:13481-13493. [PMID: 34269488 PMCID: PMC8518397 DOI: 10.1002/chem.202101880] [Citation(s) in RCA: 60] [Impact Index Per Article: 20.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/28/2021] [Indexed: 12/14/2022]
Abstract
The story of C-C bond formation includes several reactions, and surely Suzuki-Miyaura is among the most outstanding ones. Herein, a brief historical overview of insights regarding the reaction mechanism is provided. In particular, the formation of the catalytically active species is probably the main concern, thus the preactivation is in competition with, or even assumes the role of the rate determining step (rds) of the overall reaction. Computational chemistry is key in identifying the rds and thus leading to milder conditions on an experimental level by means of predictive catalysis.
Collapse
Affiliation(s)
- Massimo C D'Alterio
- Institut de Química Computacional i Catàlisi Departament de Química, Universitat de Girona, c/ Maria Aurèlia Capmany 69, 17003, Girona, Catalonia, Spain
- Dipartimento di Scienze Chimiche, Università di Napoli, Federico II Via Cintia, I-80126, Napoli, Italy
| | - Èric Casals-Cruañas
- Institut de Química Computacional i Catàlisi Departament de Química, Universitat de Girona, c/ Maria Aurèlia Capmany 69, 17003, Girona, Catalonia, Spain
| | - Nikolaos V Tzouras
- Department of Chemistry and Center for Sustainable Chemistry, Ghent University, Building S3, Krijgslaan 281, 9000, Gent, Belgium
| | - Giovanni Talarico
- Dipartimento di Scienze Chimiche, Università di Napoli, Federico II Via Cintia, I-80126, Napoli, Italy
| | - Steven P Nolan
- Department of Chemistry and Center for Sustainable Chemistry, Ghent University, Building S3, Krijgslaan 281, 9000, Gent, Belgium
| | - Albert Poater
- Institut de Química Computacional i Catàlisi Departament de Química, Universitat de Girona, c/ Maria Aurèlia Capmany 69, 17003, Girona, Catalonia, Spain
| |
Collapse
|
12
|
Kaloğlu M, Şahan MH, Düşünceli SD, Özdemir İ. Synthesis of Quinoxaline-Linked Bis(Benzimidazolium) Salts and Their Catalytic Application in Palladium-Catalyzed Direct Arylation of Heteroarenes. Catal Letters 2021. [DOI: 10.1007/s10562-021-03787-2] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
|
13
|
A general palladium-catalyzed cross-coupling of aryl fluorides and organotitanium (IV) reagents. MONATSHEFTE FUR CHEMIE 2021. [DOI: 10.1007/s00706-021-02796-6] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
|
14
|
Shibuya M, Matsuda M, Yamamoto Y. 1,2-Carbopentafluorophenylation of Alkynes: The Metallomimetic Pull-Push Reactivity of Tris(pentafluorophenyl)borane. Chemistry 2021; 27:8822-8831. [PMID: 33860597 DOI: 10.1002/chem.202101090] [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: 03/25/2021] [Indexed: 12/26/2022]
Abstract
We report the novel single-step 1,2-dicarbofunctionalization of an arylacetylene with an allylsilane and tris(pentafluorophenyl)borane [B(C6 F5 )3 ] involving C-C bond formation with C-H bond scission at the β-position to the silicon atom of an allylsilane and B→C migration of a C6 F5 group. The 1,2-carbopentafluorophenylation occurs smoothly without the requirement for a catalyst or heating. Mechanistic studies suggest that the metallomimetic "pull-push" reactivity of B(C6 F5 )3 imparts consecutive electrophilic and nucleophilic characteristics to the benzylic carbon of the arylacetylene. Subsequent photochemical 6π-electrocyclization affords tetrafluoronaphthalenes, which are important in the pharmaceutical and materials sciences. Owing to the unique reactivity of B(C6 F5 )3 , the 1,2-carbopentafluorophenylation using 2-substituted furan proceeded with ring opening, and the reaction using silyl enolates formed a C-C bond with C-O bond scission at the silyloxy-substituted carbon.
Collapse
Affiliation(s)
- Masatoshi Shibuya
- Department of Basic Medicinal Sciences, Graduate School of Pharmaceutical Sciences, Nagoya University, Chikusa, Nagoya, 464-8601, Japan
| | - Miki Matsuda
- Department of Basic Medicinal Sciences, Graduate School of Pharmaceutical Sciences, Nagoya University, Chikusa, Nagoya, 464-8601, Japan
| | - Yoshihiko Yamamoto
- Department of Basic Medicinal Sciences, Graduate School of Pharmaceutical Sciences, Nagoya University, Chikusa, Nagoya, 464-8601, Japan
| |
Collapse
|
15
|
Recent advances in the total synthesis of natural products bearing the contiguous all-carbon quaternary stereocenters. Tetrahedron Lett 2021. [DOI: 10.1016/j.tetlet.2021.153029] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
|
16
|
Löffler LE, Wirtz C, Fürstner A. Collective Total Synthesis of Casbane Diterpenes: One Strategy, Multiple Targets. Angew Chem Int Ed Engl 2021; 60:5316-5322. [PMID: 33289954 PMCID: PMC7986786 DOI: 10.1002/anie.202015243] [Citation(s) in RCA: 31] [Impact Index Per Article: 10.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/15/2020] [Indexed: 11/29/2022]
Abstract
Of the more than 100 casbane diterpenes known to date, only the eponymous parent hydrocarbon casbene itself has ever been targeted by chemical synthesis. Outlined herein is a conceptually new approach that brings not a single but a variety of casbane derivatives into reach, especially the more highly oxygenated and arguably more relevant members of this family. The key design elements are a catalyst-controlled intramolecular cyclopropanation with or without subsequent equilibration, chain extension of the resulting stereoisomeric cyclopropane building blocks by chemoselective hydroboration/cross-coupling, and the efficient closure of the strained macrobicyclic framework by ring-closing alkyne metathesis. A hydroxy-directed catalytic trans-hydrostannation allows for late-stage diversity. These virtues are manifested in the concise total syntheses of depressin, yuexiandajisu A, and ent-pekinenin C. The last compound turned out to be identical to euphorhylonal A, the structure of which had clearly been misassigned.
Collapse
Affiliation(s)
| | - Conny Wirtz
- Max-Planck-Institut für Kohlenforschung45470Mülheim/RuhrGermany
| | - Alois Fürstner
- Max-Planck-Institut für Kohlenforschung45470Mülheim/RuhrGermany
| |
Collapse
|
17
|
Abstract
![]()
A nonthermodynamic array of four skipped methylene substituents on the hydrophobic tail
renders limaol, a C40-polyketide of marine origin, unique in structural terms. This
conspicuous segment was assembled by a two-directional approach and finally coupled to
the polyether domain by an allyl/alkenyl Stille reaction under neutral conditions. The
core region itself was prepared via a 3,3′-dibromo-BINOL-catalyzed asymmetric
propargylation, a gold-catalyzed spirocyclization, and introduction of the southern
sector via substrate-controlled allylation as the key steps.
Collapse
Affiliation(s)
- Stephan N Hess
- Max-Planck-Institut für Kohlenforschung, 45470 Mülheim/Ruhr, Germany
| | - Xiaobin Mo
- Max-Planck-Institut für Kohlenforschung, 45470 Mülheim/Ruhr, Germany
| | - Conny Wirtz
- Max-Planck-Institut für Kohlenforschung, 45470 Mülheim/Ruhr, Germany
| | - Alois Fürstner
- Max-Planck-Institut für Kohlenforschung, 45470 Mülheim/Ruhr, Germany
| |
Collapse
|
18
|
Löffler LE, Wirtz C, Fürstner A. Collective Total Synthesis of Casbane Diterpenes: One Strategy, Multiple Targets. Angew Chem Int Ed Engl 2021. [DOI: 10.1002/ange.202015243] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Affiliation(s)
| | - Conny Wirtz
- Max-Planck-Institut für Kohlenforschung 45470 Mülheim/Ruhr Germany
| | - Alois Fürstner
- Max-Planck-Institut für Kohlenforschung 45470 Mülheim/Ruhr Germany
| |
Collapse
|
19
|
Ambre R, Wang TH, Xian A, Chen YS, Liang YF, Jurca T, Zhao L, Ong TG. Directing Group-Promoted Inert C-O Bond Activation Using Versatile Boronic Acid as a Coupling Agent. Chemistry 2020; 26:17021-17026. [PMID: 32926475 DOI: 10.1002/chem.202004132] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/11/2020] [Indexed: 12/14/2022]
Abstract
A simple Ni(cod)2 and carbene mediated strategy facilitates the efficient catalytic cross-coupling of methoxyarenes with a variety of organoboron reagents. Directing groups facilitate the activation of inert C-O bonds in under-utilized aryl methyl ethers enabling their adaptation for C-C cross-coupling reactions as less toxic surrogates to the ubiquitous haloarenes. The method reported enables C-C cross-coupling with readily available and economical arylboronic acid reagents, which is unprecedented, and compares well with other organoboron reagents with similarly high reactivity. Extension to directing group assisted chemo-selective C-O bond cleavage, and further application towards the synthesis of novel bifunctionalized biaryls is reported. Key to the success of this protocol is the use of directing groups proximal to the reaction center to facilitate the activation of the inert C-OMe bond.
Collapse
Affiliation(s)
- Ram Ambre
- Institute of Chemistry, Academia Sinica, Taipei, Taiwan) (ROC
| | - Ting-Hsuan Wang
- Institute of Chemistry, Academia Sinica, Taipei, Taiwan) (ROC
| | - Anmei Xian
- Institute of Advanced Synthesis, School of Chemistry and Molecular Engineering, Jiangsu National Synergetic Innovation Center for, Advanced Materials, Nanjing Tech University, Nanjing, 211816, P. R. China
| | - Yu-Shiuan Chen
- Institute of Chemistry, Academia Sinica, Taipei, Taiwan) (ROC
| | - Yu-Fu Liang
- Institute of Chemistry, Academia Sinica, Taipei, Taiwan) (ROC
| | - Titel Jurca
- Department of Chemistry and the Renewable Energy and Chemical Transformations Cluster, University of Central Florida, Orlando, FL, 32816, USA
| | - Lili Zhao
- Institute of Advanced Synthesis, School of Chemistry and Molecular Engineering, Jiangsu National Synergetic Innovation Center for, Advanced Materials, Nanjing Tech University, Nanjing, 211816, P. R. China
| | - Tiow-Gan Ong
- Institute of Chemistry, Academia Sinica, Taipei, Taiwan) (ROC.,Department of Chemistry, National (Taiwan) University, Taipei, Taiwan) (ROC
| |
Collapse
|
20
|
Cortés I, Cala LJ, Bracca ABJ, Kaufman TS. Furo[3,2- c]coumarins carrying carbon substituents at C-2 and/or C-3. Isolation, biological activity, synthesis and reaction mechanisms. RSC Adv 2020; 10:33344-33377. [PMID: 35515056 PMCID: PMC9056730 DOI: 10.1039/d0ra06930b] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/11/2020] [Accepted: 09/01/2020] [Indexed: 12/23/2022] Open
Abstract
The isolation, biological activity and synthesis of natural furo[3,2-c]coumarins are presented, covering mainly the developments in the last 35 years. The most relevant approaches toward the synthesis of 2-substituted, 3-substituted and 2,3-disubstituted heterocycles are also discussed, with emphasis on the efficiency of the processes and their mechanisms.
Collapse
Affiliation(s)
- Iván Cortés
- Instituto de Química Rosario (IQUIR, CONICET-UNR), Facultad de Ciencias Bioquímicas y Farmacéuticas - Universidad Nacional de Rosario Suipacha 531 S2002LRK Rosario Argentina
| | - L Javier Cala
- Instituto de Química Rosario (IQUIR, CONICET-UNR), Facultad de Ciencias Bioquímicas y Farmacéuticas - Universidad Nacional de Rosario Suipacha 531 S2002LRK Rosario Argentina
| | - Andrea B J Bracca
- Instituto de Química Rosario (IQUIR, CONICET-UNR), Facultad de Ciencias Bioquímicas y Farmacéuticas - Universidad Nacional de Rosario Suipacha 531 S2002LRK Rosario Argentina
| | - Teodoro S Kaufman
- Instituto de Química Rosario (IQUIR, CONICET-UNR), Facultad de Ciencias Bioquímicas y Farmacéuticas - Universidad Nacional de Rosario Suipacha 531 S2002LRK Rosario Argentina
| |
Collapse
|
21
|
Huang Y, Xu L, Yu F, Shen W, Lu X, Ding L, Zhong L, Zhong G, Zhang J. Stereoselective and Atom-Economic Alkenyl C-H Allylation/Alkenylation in Aqueous Media by Iridium Catalysis. J Org Chem 2020; 85:7225-7237. [PMID: 32372645 DOI: 10.1021/acs.joc.0c00619] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
A practical and atom-economic protocol for the stereoselective preparation of various 1,4- and 1,3-diene skeletons through iridium-catalyzed directed olefinic C-H allylation and alkenylation of NH-Ts acrylamides in water was developed. This reaction tolerated a wide scope of substrates under simple reaction conditions and enabled successful gram-scale preparation. Furthermore, an asymmetric variant of this reaction giving enantioenriched 1,4-dienes was achieved employing a chiral diene-iridium complex as the catalyst.
Collapse
Affiliation(s)
- Yinhua Huang
- College of Materials, Chemistry and Chemical Engineering, Hangzhou Normal University, Hangzhou 311121, China
| | - Liangyao Xu
- College of Materials, Chemistry and Chemical Engineering, Hangzhou Normal University, Hangzhou 311121, China
| | - Feifei Yu
- College of Materials, Chemistry and Chemical Engineering, Hangzhou Normal University, Hangzhou 311121, China
| | - Wenzhou Shen
- College of Materials, Chemistry and Chemical Engineering, Hangzhou Normal University, Hangzhou 311121, China
| | - Xiunan Lu
- College of Materials, Chemistry and Chemical Engineering, Hangzhou Normal University, Hangzhou 311121, China
| | - Liyuan Ding
- College of Materials, Chemistry and Chemical Engineering, Hangzhou Normal University, Hangzhou 311121, China
| | - Liangjun Zhong
- Department of Stomatology, The Affiliated Hospital of Hangzhou Normal University, Hangzhou Normal University, Hangzhou 310015, China
| | - Guofu Zhong
- College of Materials, Chemistry and Chemical Engineering, Hangzhou Normal University, Hangzhou 311121, China
| | - Jian Zhang
- College of Materials, Chemistry and Chemical Engineering, Hangzhou Normal University, Hangzhou 311121, China
| |
Collapse
|
22
|
Noriega S, Leyva E, Moctezuma E, Flores L, Loredo-Carrillo S. Recent Catalysts Used in the Synthesis of 1,4-Disubstituted 1,2,3-Triazoles by Heterogeneous and Homogeneous Methods. CURR ORG CHEM 2020. [DOI: 10.2174/1385272824666200226120135] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Abstract
1,2,3-triazoles are popular heterocycles employed in material sciences and medicinal
chemistry as they show antiviral, antibacterial, anti-HIV, antitubercular, and antifungal
activities. Triazoles are appealing due to their stability and interesting click chemistry
properties. The Cu(I) catalyzed reaction between azides and alkynes affords the 1,4-
disubstituted derivative exclusively becoming a useful synthetic tool. However, one of the
main drawbacks of the catalyzed reaction is the need to use Cu(I), which is unstable at
standard conditions and rapidly oxidizes to the non-active Cu(II). The most common approach
when synthesizing 1,4-disubstituted-1,2,3-triazoles is to reduce Cu in situ employing
inorganic Cu salts and a reducing agent. The resulting Cu(I) needs to be further stabilized
with organic ligands for the reaction to take place. The aim of homogeneous catalysis
is to produce a ligand with a dual function both in reducing and stabilizing Cu(I) without interfering in the
overall reaction. Instead, heterogeneous catalysis offers more options when supporting Cu on nanoparticles,
complexes, and composites yielding the desired 1,2,3-triazoles in most cases without the need of a reducing
agent under green solvents such as ethanol and water. The catalytic activity of Ag, Ru, and Ce is also discussed.
This review exemplifies how the use of homogeneous and heterogeneous catalysts offers new and
green methodologies for the synthesis of 1,2,3-triazole derivatives. The materials supporting Cu show catalytic
properties like high surface area, acid-base sites or phase transfer. Although there is no ideal catalyst, Cu remains
the most effective metal since it is economical, abundant and readily available.
Collapse
Affiliation(s)
- Saúl Noriega
- Facultad de Ciencias Quimicas, Universidad Autonoma de San Luis Potosí, Av. Manuel Nava # 6, San Luis Potosí, S.L.P., 78210, Mexico
| | - Elisa Leyva
- Facultad de Ciencias Quimicas, Universidad Autonoma de San Luis Potosí, Av. Manuel Nava # 6, San Luis Potosí, S.L.P., 78210, Mexico
| | - Edgar Moctezuma
- Facultad de Ciencias Quimicas, Universidad Autonoma de San Luis Potosí, Av. Manuel Nava # 6, San Luis Potosí, S.L.P., 78210, Mexico
| | - Luisa Flores
- Facultad de Ciencias Quimicas, Universidad Autonoma de San Luis Potosí, Av. Manuel Nava # 6, San Luis Potosí, S.L.P., 78210, Mexico
| | - Silvia Loredo-Carrillo
- Facultad de Ciencias Quimicas, Universidad Autonoma de San Luis Potosí, Av. Manuel Nava # 6, San Luis Potosí, S.L.P., 78210, Mexico
| |
Collapse
|
23
|
Liu F, Jiang H, Zhou Y, Shi Z. Direct Transformation of Arenols Based on C—O Activation. CHINESE J CHEM 2020. [DOI: 10.1002/cjoc.201900506] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
Affiliation(s)
- Feng Liu
- School of Perfume and Aroma Technology, Shanghai Institute of Technology 100 Haiquan Rd Shanghai 201418 China
- Department of ChemistryFudan University 2005 Honghu Rd Shanghai 200438 China
| | - Hao‐jun Jiang
- School of Perfume and Aroma Technology, Shanghai Institute of Technology 100 Haiquan Rd Shanghai 201418 China
| | - Yi Zhou
- School of Perfume and Aroma Technology, Shanghai Institute of Technology 100 Haiquan Rd Shanghai 201418 China
| | - Zhang‐jie Shi
- Department of ChemistryFudan University 2005 Honghu Rd Shanghai 200438 China
| |
Collapse
|
24
|
Zhou M, Tsien J, Qin T. Sulfur(IV)-Mediated Unsymmetrical Heterocycle Cross-Couplings. Angew Chem Int Ed Engl 2020; 59:7372-7376. [PMID: 32043749 DOI: 10.1002/anie.201915425] [Citation(s) in RCA: 26] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/03/2019] [Indexed: 11/09/2022]
Abstract
Despite the tremendous utilities of metal-mediated cross-couplings in modern organic chemistry, coupling reactions involving nitrogenous heteroarenes remain a challenging undertaking - coordination of Lewis basic atoms into metal centers often necessitate elevated temperature, high catalyst loading, etc. Herein, we report a sulfur (IV) mediated cross-coupling amendable for the efficient synthesis of heteroaromatic substrates. Addition of heteroaryl nucleophiles to a simple, readily-accessible alkyl sulfinyl (IV) chloride allows formation of a trigonal bipyramidal sulfurane intermediate. Reductive elimination therefrom provides bis-heteroaryl products in a practical and efficient fashion.
Collapse
Affiliation(s)
- Min Zhou
- Department of Biochemistry, The University of Texas Southwestern Medical Center, 5323 Harry Hines Boulevard, Dallas, TX, 75390-9038, USA
| | - Jet Tsien
- Department of Biochemistry, The University of Texas Southwestern Medical Center, 5323 Harry Hines Boulevard, Dallas, TX, 75390-9038, USA
| | - Tian Qin
- Department of Biochemistry, The University of Texas Southwestern Medical Center, 5323 Harry Hines Boulevard, Dallas, TX, 75390-9038, USA
| |
Collapse
|
25
|
Zhou M, Tsien J, Qin T. Sulfur(IV)‐Mediated Unsymmetrical Heterocycle Cross‐Couplings. Angew Chem Int Ed Engl 2020. [DOI: 10.1002/ange.201915425] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Min Zhou
- Department of BiochemistryThe University of Texas Southwestern Medical Center 5323 Harry Hines Boulevard Dallas TX 75390-9038 USA
| | - Jet Tsien
- Department of BiochemistryThe University of Texas Southwestern Medical Center 5323 Harry Hines Boulevard Dallas TX 75390-9038 USA
| | - Tian Qin
- Department of BiochemistryThe University of Texas Southwestern Medical Center 5323 Harry Hines Boulevard Dallas TX 75390-9038 USA
| |
Collapse
|
26
|
Wu F, Zhu K, Wu G, Gao Y, Chen H. Nickel-Catalyzed C-O Cross-Coupling Reaction at Low Catalytic Loading with Weak Base Participation. European J Org Chem 2020. [DOI: 10.1002/ejoc.201901851] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Fan Wu
- Key Laboratory of Molecule Synthesis and Function Discovery (Fujian Province University); College of Chemistry; Fuzhou University; 350116 Fuzhou Fujian China
| | - Kejie Zhu
- Key Laboratory of Molecule Synthesis and Function Discovery (Fujian Province University); College of Chemistry; Fuzhou University; 350116 Fuzhou Fujian China
| | - Guolin Wu
- Key Laboratory of Molecule Synthesis and Function Discovery (Fujian Province University); College of Chemistry; Fuzhou University; 350116 Fuzhou Fujian China
| | - Yu Gao
- Key Laboratory of Molecule Synthesis and Function Discovery (Fujian Province University); College of Chemistry; Fuzhou University; 350116 Fuzhou Fujian China
| | - Haijun Chen
- Key Laboratory of Molecule Synthesis and Function Discovery (Fujian Province University); College of Chemistry; Fuzhou University; 350116 Fuzhou Fujian China
| |
Collapse
|
27
|
Ramazanov IR, Kadikova RN, Saitova ZR, Dzhemilev UM. Pathways of the reaction between N,N-disubstituted propargylic amines and cationic zirconium complexes. Russ Chem Bull 2020. [DOI: 10.1007/s11172-020-2723-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
|
28
|
Meng K, Sun Y, Zhang J, Zhang K, Ji X, Ding L, Zhong G. Iridium-Catalyzed Cross-Coupling Reactions of Alkenes by Hydrogen Transfer. Org Lett 2019; 21:8219-8224. [PMID: 31589451 DOI: 10.1021/acs.orglett.9b02935] [Citation(s) in RCA: 27] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
A range of Ru-, Rh-, or Pd-catalyzed vinylic C-H/C-H cross-coupling reactions of olefins have been demonstrated to provide 1,3-dienes, using a quantitative amount of metal oxidants. Although transfer hydrogenation and C-H alkenylation are two important areas that evolved independently, we herein report the first iridium-catalyzed cross-coupling reactions of alkenes by integration of directed C(alkenyl)-H alkenylation and transfer hydrogenation to obviate the usage of a metal oxidant, employing a hydrogen acceptor such as inexpensive chloranil.
Collapse
Affiliation(s)
- Keke Meng
- College of Materials, Chemistry and Chemical Engineering , Hangzhou Normal University , Hangzhou 311121 , China
| | - Yaling Sun
- College of Materials, Chemistry and Chemical Engineering , Hangzhou Normal University , Hangzhou 311121 , China
| | - Jian Zhang
- College of Materials, Chemistry and Chemical Engineering , Hangzhou Normal University , Hangzhou 311121 , China
| | - Kaiyun Zhang
- College of Materials, Chemistry and Chemical Engineering , Hangzhou Normal University , Hangzhou 311121 , China
| | - Xiaohui Ji
- College of Materials, Chemistry and Chemical Engineering , Hangzhou Normal University , Hangzhou 311121 , China
| | - Liyuan Ding
- College of Materials, Chemistry and Chemical Engineering , Hangzhou Normal University , Hangzhou 311121 , China
| | - Guofu Zhong
- College of Materials, Chemistry and Chemical Engineering , Hangzhou Normal University , Hangzhou 311121 , China
| |
Collapse
|
29
|
Murugesan V, Balakrishnan V, Rasappan R. Nickel-catalyzed cross-coupling reaction of carbamates with silylmagnesium reagents. J Catal 2019. [DOI: 10.1016/j.jcat.2019.07.026] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
|
30
|
Dander JE, Morrill LA, Nguyen MM, Chen S, Garg NK. Breaking Amide C-N Bonds in an Undergraduate Organic Chemistry Laboratory. JOURNAL OF CHEMICAL EDUCATION 2019; 96:776-780. [PMID: 31073247 PMCID: PMC6502258 DOI: 10.1021/acs.jchemed.8b00489] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
An undergraduate organic chemistry laboratory experiment involving the breakage of amide C-N bonds is reported. Whereas amides are typically considered stable species due to well-established resonance effects, this experiment allows students to cleave the amide C-N bond in a nickel-catalyzed esterification process. Moreover, students perform the experiment on the benchtop using a commercially available paraffin wax capsule containing the necessary nickel precatalyst and N-heterocyclic carbene ligand. The laboratory procedure introduces students to several modern topics in organic chemistry that are not otherwise well-represented in typical undergraduate organic chemistry curricula, such as amide bond cleavage, transition metal-catalyzed cross-coupling reactions, and nonprecious-metal catalysis.
Collapse
Affiliation(s)
- Jacob E. Dander
- Department of Chemistry and Biochemistry, University of California, Los Angeles, California 90095-1569, United States
| | - Lucas A. Morrill
- Department of Chemistry and Biochemistry, University of California, Los Angeles, California 90095-1569, United States
| | - Melinda M. Nguyen
- Department of Chemistry and Biochemistry, University of California, Los Angeles, California 90095-1569, United States
| | - Shuming Chen
- Department of Chemistry and Biochemistry, University of California, Los Angeles, California 90095-1569, United States
| | - Neil K. Garg
- Department of Chemistry and Biochemistry, University of California, Los Angeles, California 90095-1569, United States
| |
Collapse
|
31
|
Naganawa Y, Guo H, Sakamoto K, Nakajima Y. Nickel‐Catalyzed Selective Cross‐Coupling of Chlorosilanes with Organoaluminum Reagents. ChemCatChem 2019. [DOI: 10.1002/cctc.201900047] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Affiliation(s)
- Yuki Naganawa
- Interdisciplinary Research Center for Catalytic ChemistryNational Institute of Advanced Industrial Science and Technology Tsukuba Ibaraki 305-8565 Japan
| | - Haiqing Guo
- Interdisciplinary Research Center for Catalytic ChemistryNational Institute of Advanced Industrial Science and Technology Tsukuba Ibaraki 305-8565 Japan
| | - Kei Sakamoto
- Interdisciplinary Research Center for Catalytic ChemistryNational Institute of Advanced Industrial Science and Technology Tsukuba Ibaraki 305-8565 Japan
| | - Yumiko Nakajima
- Interdisciplinary Research Center for Catalytic ChemistryNational Institute of Advanced Industrial Science and Technology Tsukuba Ibaraki 305-8565 Japan
| |
Collapse
|
32
|
Lekkala R, Lekkala R, Moku B, Qin HL. SO2F2 mediated dehydrative cross-coupling of alcohols with electron-deficient olefins in DMSO using a Pd-catalyst: one-pot transformation of alcohols into 1,3-dienes. Org Chem Front 2019. [DOI: 10.1039/c8qo01388h] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
Abstract
A Pd-catalyzed, SO2F2 mediated dehydrative cross-coupling of alcohols with electron-deficient olefins for the construction of 1,3-dienes was developed.
Collapse
Affiliation(s)
- Revathi Lekkala
- State Key Laboratory of Silicate Materials for Architectures; and School of Chemistry
- Chemical Engineering and Life Science
- Wuhan University of Technology
- Wuhan
- P. R. China
| | - Ravindar Lekkala
- State Key Laboratory of Silicate Materials for Architectures; and School of Chemistry
- Chemical Engineering and Life Science
- Wuhan University of Technology
- Wuhan
- P. R. China
| | - Balakrishna Moku
- State Key Laboratory of Silicate Materials for Architectures; and School of Chemistry
- Chemical Engineering and Life Science
- Wuhan University of Technology
- Wuhan
- P. R. China
| | - Hua-Li Qin
- State Key Laboratory of Silicate Materials for Architectures; and School of Chemistry
- Chemical Engineering and Life Science
- Wuhan University of Technology
- Wuhan
- P. R. China
| |
Collapse
|
33
|
Ayogu JI, Onoabedje EA. Recent advances in transition metal-catalysed cross-coupling of (hetero)aryl halides and analogues under ligand-free conditions. Catal Sci Technol 2019. [DOI: 10.1039/c9cy01331h] [Citation(s) in RCA: 31] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
Abstract
The formation of new bonds is pivotal in organic chemistry and a prerequisite to life because it allows the construction of complex molecules from simple precursors.
Collapse
Affiliation(s)
- Jude I. Ayogu
- Department of Pure and Industrial Chemistry
- University of Nigeria
- Nsukka
- Nigeria
- Department of Chemistry
| | | |
Collapse
|
34
|
Shahabi Nejad M, Seyedi N, Sheibani H, Behzadi S. Synthesis and characterization of Ni(II) complex functionalized silica-based magnetic nanocatalyst and its application in C–N and C–C cross-coupling reactions. Mol Divers 2018; 23:527-539. [DOI: 10.1007/s11030-018-9888-2] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/28/2018] [Accepted: 10/23/2018] [Indexed: 10/27/2022]
|
35
|
Parfenova LV, Kovyazin PV, Gabdrakhmanov VZ, Istomina GP, Ivchenko PV, Nifant'ev IE, Khalilov LM, Dzhemilev UM. Ligand exchange processes in zirconocene dichloride-trimethylaluminum bimetallic systems and their catalytic properties in reaction with alkenes. Dalton Trans 2018; 47:16918-16937. [PMID: 30444522 DOI: 10.1039/c8dt04156c] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Ligand exchange processes in the systems L2ZrCl2-AlMe3 (L2ZrCl2: Cp2ZrCl2, (CpMe)2ZrCl2, (C5Me5)2ZrCl2, Me2SiCp2ZrCl2, Me2Si(C5Me4)2ZrCl2, rac-Me2C(2-Me-4-But-Cp)2ZrCl2, meso-Me2C(2-Me-4-But-Cp)2ZrCl2, rac-Me2C(3-But-Cp)2ZrCl2, Ind2ZrCl2, rac-H2C(Ind)2ZrCl2, rac-Me2C(Ind)2ZrCl2, rac-Me2Si(Ind)2ZrCl2, rac-C2H4(Ind)2ZrCl2, rac-C2H4(THInd)2ZrCl2, rac-Me2Si(THInd)2ZrCl2) and Cp2ZrMeCl2-n-AlMe3 (n = 1, 2) were studied by NMR spectroscopy with the goal to establish the structures and dynamic features of probable intermediates in the zirconocene-catalyzed reactions of alkenes with AlMe3. The effect of solvent, the organoaluminum compound concentration and the addition of (ClAlMe2)2 on the activation parameters of the alkyl exchange in the trimethylaluminum dimer was studied as well. The constants and activation parameters of the methyl group exchange in the monoalkyl-substituted ansa-complexes L2ZrMeCl (L2 = rac-Me2C(2-Me-4-But-Cp)2, rac-Me2C(3-But-Cp)2, rac-H2CInd2, rac-Me2CInd2, rac-Me2SiInd2, rac-H4C2Ind2) were established for the first time. The catalytic activity and chemoselectivity of zirconocenes in the reaction of alkenes with AlMe3 were evaluated and compared with the exchange and equilibrium constants of ligand exchange processes. A mechanism of the reaction was proposed.
Collapse
Affiliation(s)
- Lyudmila V Parfenova
- Institute of Petrochemistry and Catalysis, Russian Academy of Sciences, 450075 Ufa, prosp. Oktyabrya, 141, Russian Federation.
| | - Pavel V Kovyazin
- Institute of Petrochemistry and Catalysis, Russian Academy of Sciences, 450075 Ufa, prosp. Oktyabrya, 141, Russian Federation.
| | - Vener Z Gabdrakhmanov
- Institute of Petrochemistry and Catalysis, Russian Academy of Sciences, 450075 Ufa, prosp. Oktyabrya, 141, Russian Federation.
| | - Galina P Istomina
- Institute of Petrochemistry and Catalysis, Russian Academy of Sciences, 450075 Ufa, prosp. Oktyabrya, 141, Russian Federation. and Ufa State Petroleum Technical University, ul. Kosmonavtov 1, 450062 Ufa, Russian Federation
| | - Pavel V Ivchenko
- Department of Chemistry, Lomonosov Moscow State University, 119991 Moscow, 1-3 Leninskiye Gory, Russian Federation and A.V. Topchiev Institute of Petrochemical Synthesis, Russian Academy of Sciences, Leninsky prosp. 29, 119991 Moscow, Russian Federation
| | - Ilya E Nifant'ev
- Department of Chemistry, Lomonosov Moscow State University, 119991 Moscow, 1-3 Leninskiye Gory, Russian Federation and A.V. Topchiev Institute of Petrochemical Synthesis, Russian Academy of Sciences, Leninsky prosp. 29, 119991 Moscow, Russian Federation
| | - Leonard M Khalilov
- Institute of Petrochemistry and Catalysis, Russian Academy of Sciences, 450075 Ufa, prosp. Oktyabrya, 141, Russian Federation.
| | - Usein M Dzhemilev
- Institute of Petrochemistry and Catalysis, Russian Academy of Sciences, 450075 Ufa, prosp. Oktyabrya, 141, Russian Federation.
| |
Collapse
|
36
|
Liu M, Wu L, Han J, Xu X, He C, Wang P, Wei Q, Yang W. Facile synthesis of palladium nanoparticles on hierarchical hollow silica spheres and its catalytic properties in Suzuki-reaction. ROYAL SOCIETY OPEN SCIENCE 2018; 5:180545. [PMID: 30839758 PMCID: PMC6170588 DOI: 10.1098/rsos.180545] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 04/03/2018] [Accepted: 08/16/2018] [Indexed: 06/09/2023]
Abstract
A novel well-dispersed Pd@HHSS catalyst was synthesized by reduction of Pd(OAc)2 immobilized on HHSS we reported. When the ratios of Pd/SiO2 were 5 : 100 and 10 : 100, the Pd nanoparticles size was about 5-10 nm. The Pd@HHSS catalyst (Pd/SiO2 = 10 : 100) showed high catalytic activity in Suzuki-reaction with yields of 91-99% and the catalyst is reusable after four successive cycles without obvious loss of catalytic activity.
Collapse
Affiliation(s)
- Mao Liu
- Department of Chemistry, College of Chemistry and Chemical Engineering, Guizhou University, Guiyang, Guizhou 550025, People's Republic of China
| | | | | | | | | | | | | | - Wanliang Yang
- Department of Chemistry, College of Chemistry and Chemical Engineering, Guizhou University, Guiyang, Guizhou 550025, People's Republic of China
| |
Collapse
|
37
|
Anderl F, Größl S, Wirtz C, Fürstner A. Total Synthesis of Belizentrin Methyl Ester: Report on a Likely Conquest. Angew Chem Int Ed Engl 2018. [DOI: 10.1002/ange.201805125] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Affiliation(s)
- Felix Anderl
- Max-Planck-Institut für Kohlenforschung 45470 Mülheim/Ruhr Germany
| | - Sylvester Größl
- Max-Planck-Institut für Kohlenforschung 45470 Mülheim/Ruhr Germany
| | - Conny Wirtz
- Max-Planck-Institut für Kohlenforschung 45470 Mülheim/Ruhr Germany
| | - Alois Fürstner
- Max-Planck-Institut für Kohlenforschung 45470 Mülheim/Ruhr Germany
| |
Collapse
|
38
|
Anderl F, Größl S, Wirtz C, Fürstner A. Total Synthesis of Belizentrin Methyl Ester: Report on a Likely Conquest. Angew Chem Int Ed Engl 2018; 57:10712-10717. [DOI: 10.1002/anie.201805125] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/02/2018] [Indexed: 01/21/2023]
Affiliation(s)
- Felix Anderl
- Max-Planck-Institut für Kohlenforschung 45470 Mülheim/Ruhr Germany
| | - Sylvester Größl
- Max-Planck-Institut für Kohlenforschung 45470 Mülheim/Ruhr Germany
| | - Conny Wirtz
- Max-Planck-Institut für Kohlenforschung 45470 Mülheim/Ruhr Germany
| | - Alois Fürstner
- Max-Planck-Institut für Kohlenforschung 45470 Mülheim/Ruhr Germany
| |
Collapse
|
39
|
Synthesis of N-heterocyclic carbene-palladium-PEPPSI complexes and their catalytic activity in the direct C-H bond activation. J Organomet Chem 2018. [DOI: 10.1016/j.jorganchem.2017.10.019] [Citation(s) in RCA: 37] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
|
40
|
Nishimoto Y, Hirase R, Yasuda M. Anti-Carboalumination of Alkynes Using Aluminum Trihalide and Silyl Ketene Imines: Stereo- and Regioselective Synthesis of Alkenylaluminum Compounds Bearing a Cyano Group. Org Lett 2018; 20:3651-3655. [PMID: 29846079 DOI: 10.1021/acs.orglett.8b01371] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
An organoaluminum-free and catalyst-free anti-carboalumination of alkynes using aluminum trihalides and silyl ketene imines was developed. Three components, an alkyne, AlX3, and a silyl ketene imine, were simply mixed to give the alkenylaluminum bearing a cyano group with regioselectivity. Theoretical calculations revealed the effective activation of the alkyne by AlX3 to enhance the regioselective carboalumination. The synthesized alkenylaluminums were applicable to many organic transformations.
Collapse
Affiliation(s)
- Yoshihiro Nishimoto
- Frontier Research Base for Global Young Researchers, Center for Open Innovation Research and Education (COiRE), Graduate School of Engineering , Osaka University , 2-1 Yamadaoka, Suita , Osaka 565-0871 , Japan
| | - Rina Hirase
- Department of Applied Chemistry, Graduate School of Engineering , Osaka University , 2-1 Yamadaoka, Suita , Osaka 565-0871 , Japan
| | - Makoto Yasuda
- Department of Applied Chemistry, Graduate School of Engineering , Osaka University , 2-1 Yamadaoka, Suita , Osaka 565-0871 , Japan
| |
Collapse
|
41
|
|
42
|
Kaloğlu M, Özdemir İ. Palladium(II)- N -heterocyclic carbene-catalyzed direct C2- or C5-arylation of thiazoles with aryl bromides. Tetrahedron 2018. [DOI: 10.1016/j.tet.2018.03.026] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
|
43
|
|
44
|
Dhiman S, Nandwana NK, Saini HK, Kumar D, Rangan K, Robertson KN, Jha M, Kumar A. Nickel-Catalyzed Tandem Knoevenagel Condensation and Intramolecular Direct Arylation: Synthesis of Pyrazolo[5,1-a]-isoquinoline Derivatives. Adv Synth Catal 2018. [DOI: 10.1002/adsc.201701519] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Affiliation(s)
- Shiv Dhiman
- Department of Chemistry; BITS Pilani; Pilani Campus Pilani 333031 Rajasthan, India
| | | | - Hitesh Kumar Saini
- Department of Chemistry; BITS Pilani; Pilani Campus Pilani 333031 Rajasthan, India
| | - Dalip Kumar
- Department of Chemistry; BITS Pilani; Pilani Campus Pilani 333031 Rajasthan, India
| | - Krishnan Rangan
- Department of Chemistry; BITS Pilani; Hyderabad Campus; Secunderabad 500078 Telangana India
| | | | - Mukund Jha
- Department of Biology and Chemistry; Nipissing University; North Bay, ON P1B 8L7 Canada
| | - Anil Kumar
- Department of Chemistry; BITS Pilani; Pilani Campus Pilani 333031 Rajasthan, India
| |
Collapse
|
45
|
Affiliation(s)
- Michael Busch
- Laboratory for Computational Molecular Design and National Center for Computational Design and Discovery of Novel Materials (MARVEL), Ecole Polytechnique Fédérale de Lausanne (EPFL), 1015 Lausanne, Switzerland
| | - Matthew D. Wodrich
- Laboratory for Computational Molecular Design, Institute of Chemical Sciences and Engineering, Ecole Polytechnique Fédérale de Lausanne (EPFL), 1015 Lausanne, Switzerland
| | - Clémence Corminboeuf
- Laboratory for Computational Molecular Design and National Center for Computational Design and Discovery of Novel Materials (MARVEL), Ecole Polytechnique Fédérale de Lausanne (EPFL), 1015 Lausanne, Switzerland
- Laboratory for Computational Molecular Design, Institute of Chemical Sciences and Engineering, Ecole Polytechnique Fédérale de Lausanne (EPFL), 1015 Lausanne, Switzerland
| |
Collapse
|
46
|
Development of Robust, Scaleable Catalytic Processes through Fundamental Understanding of Reaction Mechanisms. Top Catal 2017. [DOI: 10.1007/s11244-017-0736-x] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
|
47
|
Junquera LB, Fernández FE, Puerta MC, Valerga P. Nickel(II) N‐Heterocyclic Carbene Complexes: Versatile Catalysts for C–C, C–S and C–N Coupling Reactions. Eur J Inorg Chem 2017. [DOI: 10.1002/ejic.201700057] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Affiliation(s)
- Lourdes Benítez Junquera
- Departamento de Ciencia de los Materiales Ing. Metalúrgica y Química Inorgánica Universidad de Cádiz, Facultad de Ciencias Campus Río San Pedro s/n 11510 Puerto Real, Cádiz Spain
| | - Francys E. Fernández
- Departamento de Ciencia de los Materiales Ing. Metalúrgica y Química Inorgánica Universidad de Cádiz, Facultad de Ciencias Campus Río San Pedro s/n 11510 Puerto Real, Cádiz Spain
| | - M. Carmen Puerta
- Departamento de Ciencia de los Materiales Ing. Metalúrgica y Química Inorgánica Universidad de Cádiz, Facultad de Ciencias Campus Río San Pedro s/n 11510 Puerto Real, Cádiz Spain
| | - Pedro Valerga
- Departamento de Ciencia de los Materiales Ing. Metalúrgica y Química Inorgánica Universidad de Cádiz, Facultad de Ciencias Campus Río San Pedro s/n 11510 Puerto Real, Cádiz Spain
| |
Collapse
|
48
|
Meng K, Zhang J, Li F, Lin Z, Zhang K, Zhong G. Amide Directed Cross-Coupling between Alkenes and Alkynes: A Regio- and Stereoselective Approach to Substituted (2Z,4Z)-Dienamides. Org Lett 2017; 19:2498-2501. [DOI: 10.1021/acs.orglett.7b00695] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Keke Meng
- College of Materials,
Chemistry
and Chemical Engineering, Hangzhou Normal University, Hangzhou 310036, China
| | - Jian Zhang
- College of Materials,
Chemistry
and Chemical Engineering, Hangzhou Normal University, Hangzhou 310036, China
| | - Feifei Li
- College of Materials,
Chemistry
and Chemical Engineering, Hangzhou Normal University, Hangzhou 310036, China
| | - Zhenwei Lin
- College of Materials,
Chemistry
and Chemical Engineering, Hangzhou Normal University, Hangzhou 310036, China
| | - Ke Zhang
- College of Materials,
Chemistry
and Chemical Engineering, Hangzhou Normal University, Hangzhou 310036, China
| | - Guofu Zhong
- College of Materials,
Chemistry
and Chemical Engineering, Hangzhou Normal University, Hangzhou 310036, China
| |
Collapse
|
49
|
Graphene Oxide-Supported Oxime Palladacycles as Efficient Catalysts for the Suzuki–Miyaura Cross-Coupling Reaction of Aryl Bromides at Room Temperature under Aqueous Conditions. Catalysts 2017. [DOI: 10.3390/catal7030094] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
|
50
|
Abstract
Amides have been widely studied for decades, but their synthetic utility has remained limited in reactions that proceed with rupture of the amide C-N bond. Using Ni catalysis, we have found that amides can now be strategically employed in several important transformations: esterification, transamidation, Suzuki-Miyaura couplings, and Negishi couplings. These methodologies provide exciting new tools to build C-heteroatom and C-C bonds using an unconventional reactant (i.e., the amide), which is ideally suited for use in multi-step synthesis. It is expected that the area of amide C-N bond activation using nonprecious metals will continue to flourish and, in turn, will promote the growing use of amides as synthons in organic synthesis.
Collapse
Affiliation(s)
- Jacob E. Dander
- 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
| |
Collapse
|