1
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Petcu AS, Lázaro-Milla C, Alonso JM, Almendros P. Unveiling the Use of 1,1-Bis(triflyl)ethylene as CF 3SO 2CH═CH 2 Source with the Assistance of ( n-Bu) 4NF: Synthesis of 3-[(Trifluoromethyl)sulfonyl]cyclobut-1-enes. Org Lett 2024; 26:4560-4565. [PMID: 38767989 PMCID: PMC11148847 DOI: 10.1021/acs.orglett.4c01514] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/24/2024] [Revised: 05/14/2024] [Accepted: 05/17/2024] [Indexed: 05/22/2024]
Abstract
Allylic sulfone-embedded cyclobutenes have been prepared in one pot from alkynes. The carbocycle and the alkenyl sulfone moieties were installed through consecutive bis(triflyl)cyclobutenylation of a triple bond and tetra-n-butylammonium fluoride (TBAF)-assisted hydrodesulfonylation of an allylic bis(sulfone). It is noteworthy that 1,1-bis(triflyl)ethylene acts as a CF3SO2CH═CH2 source for the first time.
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Affiliation(s)
- A. Sonia Petcu
- Instituto
de Química Orgánica General, IQOG, CSIC, Juan de la Cierva 3, 28006 Madrid, Spain
- Grupo
de Lactamas y Heterociclos Bioactivos, Departamento de Química
Orgánica, Unidad Asociada al CSIC, Facultad de Química, Universidad Complutense de Madrid, 28040 Madrid, Spain
| | - Carlos Lázaro-Milla
- Grupo
de Lactamas y Heterociclos Bioactivos, Departamento de Química
Orgánica, Unidad Asociada al CSIC, Facultad de Química, Universidad Complutense de Madrid, 28040 Madrid, Spain
| | - José M. Alonso
- Grupo
de Lactamas y Heterociclos Bioactivos, Departamento de Química
Orgánica, Unidad Asociada al CSIC, Facultad de Química, Universidad Complutense de Madrid, 28040 Madrid, Spain
| | - Pedro Almendros
- Instituto
de Química Orgánica General, IQOG, CSIC, Juan de la Cierva 3, 28006 Madrid, Spain
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2
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Andreetta P, Martin RT, Souilah C, Rentería-Gómez Á, Song Z, Khorramshahi Bayat Y, Ivlev S, Gutierrez O, Casitas A. Experimental and Computational Studies on Cobalt(I)-Catalyzed Regioselective Allylic Alkylation Reactions. Angew Chem Int Ed Engl 2023; 62:e202310129. [PMID: 37772828 PMCID: PMC10843511 DOI: 10.1002/anie.202310129] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/16/2023] [Revised: 09/27/2023] [Accepted: 09/28/2023] [Indexed: 09/30/2023]
Abstract
Here, we report the development of cobalt(I)-catalyzed regioselective allylic alkylation reactions of tertiary allyl carbonates with 1,3-dicarbonyl compounds. A family of well-defined tetrahedral cobalt(I) complexes bearing commercially available bidentate bis(phosphine) ligands [(P,P)Co(PPh3 )Cl] are synthesized and explored as catalysts in allylic alkylation reactions. The catalyst [(dppp)Co(PPh3 )Cl] (dppp=1,3-Bis(diphenylphosphino)propane) enables the alkylation of a large variety of tertiary allyl carbonates with high yields and excellent regioselectivity for the branched product. Remarkably, this methodology is selective for the activation of tertiary allyl carbonates even in the presence of secondary allyl carbonates. This contrasts with the selectivity observed in cobalt-catalyzed allylic alkylations enabled by visible light photocatalysis. Mechanistic insights by means of experimental and computational investigations support a Co(I)/Co(III) catalytic cycle.
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Affiliation(s)
- Philip Andreetta
- Fachbereich Chemie, Philipps-Universität Marburg, Hans-Meerwein-Straße 4, 35043, Marburg, Germany
| | - Robert T Martin
- Department of Chemistry and Biochemistry, University of Maryland, College Park. 8051 Regents Dr, College Park, Maryland, 20742, USA
| | - Charafa Souilah
- Fachbereich Chemie, Philipps-Universität Marburg, Hans-Meerwein-Straße 4, 35043, Marburg, Germany
| | - Ángel Rentería-Gómez
- Department of Chemistry, Texas A&M University, College Station, Texas, 77843, USA
| | - Zhihui Song
- Department of Chemistry and Biochemistry, University of Maryland, College Park. 8051 Regents Dr, College Park, Maryland, 20742, USA
| | - Yas Khorramshahi Bayat
- Fachbereich Chemie, Philipps-Universität Marburg, Hans-Meerwein-Straße 4, 35043, Marburg, Germany
| | - Sergei Ivlev
- Fachbereich Chemie, Philipps-Universität Marburg, Hans-Meerwein-Straße 4, 35043, Marburg, Germany
| | - Osvaldo Gutierrez
- Department of Chemistry, Texas A&M University, College Station, Texas, 77843, USA
| | - Alicia Casitas
- Fachbereich Chemie, Philipps-Universität Marburg, Hans-Meerwein-Straße 4, 35043, Marburg, Germany
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3
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Tamatam R, Kim SH, Shin D. Transition-metal-catalyzed synthesis of quinazolines: A review. Front Chem 2023; 11:1140562. [PMID: 37007059 PMCID: PMC10060649 DOI: 10.3389/fchem.2023.1140562] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/09/2023] [Accepted: 02/27/2023] [Indexed: 03/18/2023] Open
Abstract
Quinazolines are a class of nitrogen-containing heterocyclic compounds with broad-spectrum of pharmacological activities. Transition-metal-catalyzed reactions have emerged as reliable and indispensable tools for the synthesis of pharmaceuticals. These reactions provide new entries into pharmaceutical ingredients of continuously increasing complexity, and catalysis with these metals has streamlined the synthesis of several marketed drugs. The last few decades have witnessed a tremendous outburst of transition-metal-catalyzed reactions for the construction of quinazoline scaffolds. In this review, the progress achieved in the synthesis of quinazolines under transition metal-catalyzed conditions are summarized and reports from 2010 to date are covered. This is presented along with the mechanistic insights of each representative methodology. The advantages, limitations, and future perspectives of synthesis of quinazolines through such reactions are also discussed.
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Affiliation(s)
- Rekha Tamatam
- College of Pharmacy, Gachon University, Incheon, Republic of Korea
- Gachon Pharmaceutical Research Institute, Gachon University, Incheon, Republic of Korea
| | - Seok-Ho Kim
- College of Pharmacy, Kangwon National University, Chuncheon, Gangwon-do, Republic of Korea
- *Correspondence: Seok-Ho Kim, ; Dongyun Shin,
| | - Dongyun Shin
- College of Pharmacy, Gachon University, Incheon, Republic of Korea
- Gachon Pharmaceutical Research Institute, Gachon University, Incheon, Republic of Korea
- *Correspondence: Seok-Ho Kim, ; Dongyun Shin,
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4
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Hu Y, Zou Y, Yang H, Ji H, Jin Y, Zhang Z, Liu Y, Zhang W. Precise Synthesis of Chiral Z-Allylamides by Cobalt-Catalyzed Asymmetric Sequential Hydrogenations. Angew Chem Int Ed Engl 2023; 62:e202217871. [PMID: 36753391 DOI: 10.1002/anie.202217871] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/04/2022] [Revised: 02/06/2023] [Accepted: 02/08/2023] [Indexed: 02/09/2023]
Abstract
Asymmetric sequential hydrogenations of conjugated enynes have been developed using a Ph-BPE-CoI catalyst for the precise synthesis of chiral Z-allylamides in high activity (up to 1000 substrate/catalyst (S/C)) and with excellent enantioselectivity (up to >99 % enantiomeric excess (ee)). Mechanism experiments and theoretical calculations support a cationic CoI /CoIII redox catalytic cycle. The catalytic activity difference between cobalt complexes of Ph-BPE and QuinoxP* was explained by the process decomposition of rate-determining step in the second hydrogenation.
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Affiliation(s)
- Yanhua Hu
- Shanghai Key Laboratory for Molecular Engineering of Chiral Drugs, School of Pharmacy, Shanghai Jiao Tong University, 800 Dongchuan Road, Shanghai, 200240, China
| | - Yashi Zou
- Shanghai Key Laboratory for Molecular Engineering of Chiral Drugs, School of Pharmacy, Shanghai Jiao Tong University, 800 Dongchuan Road, Shanghai, 200240, China
| | - Huiwen Yang
- Shanghai Key Laboratory for Molecular Engineering of Chiral Drugs, School of Pharmacy, Shanghai Jiao Tong University, 800 Dongchuan Road, Shanghai, 200240, China
| | - Haotian Ji
- Frontier Science Center for Transformative Molecules, School of Chemistry and Chemical Engineering, Shanghai Jiao Tong University, 800 Dongchuan Road, Shanghai, 200240, China
| | - Yue Jin
- Shanghai Key Laboratory for Molecular Engineering of Chiral Drugs, School of Pharmacy, Shanghai Jiao Tong University, 800 Dongchuan Road, Shanghai, 200240, China
| | - Zhenfeng Zhang
- Shanghai Key Laboratory for Molecular Engineering of Chiral Drugs, School of Pharmacy, Shanghai Jiao Tong University, 800 Dongchuan Road, Shanghai, 200240, China
| | - Yangang Liu
- Shanghai Key Laboratory for Molecular Engineering of Chiral Drugs, School of Pharmacy, Shanghai Jiao Tong University, 800 Dongchuan Road, Shanghai, 200240, China.,Frontier Science Center for Transformative Molecules, School of Chemistry and Chemical Engineering, Shanghai Jiao Tong University, 800 Dongchuan Road, Shanghai, 200240, China
| | - Wanbin Zhang
- Shanghai Key Laboratory for Molecular Engineering of Chiral Drugs, School of Pharmacy, Shanghai Jiao Tong University, 800 Dongchuan Road, Shanghai, 200240, China.,Frontier Science Center for Transformative Molecules, School of Chemistry and Chemical Engineering, Shanghai Jiao Tong University, 800 Dongchuan Road, Shanghai, 200240, China
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5
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Parsutkar MM, Moore CE, RajanBabu TV. Activator-free single-component Co(I)-catalysts for regio- and enantioselective heterodimerization and hydroacylation reactions of 1,3-dienes. New reduction procedures for synthesis of [L]Co(I)-complexes and comparison to in situ generated catalysts. Dalton Trans 2022; 51:10148-10159. [PMID: 35734952 PMCID: PMC9441011 DOI: 10.1039/d2dt01484j] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Although cobalt(I) bis-phosphine complexes have been implicated in many selective C-C bond-forming reactions, until recently relatively few of these compounds have been fully characterized or have been shown to be intermediates in catalytic reactions. In this paper we present a new practical method for the synthesis and isolation of several cobalt(I)-bis-phosphine complexes and their use in Co(I)-catalyzed reactions. We find that easily prepared (in situ generated or isolated) bis-phosphine and (2,6-N-aryliminoethyl)pyridine (PDI) cobalt(II) halide complexes are readily reduced by 1,4-bis-trimethylsilyl-1,4-dihydropyrazine or commercially available lithium nitride (Li3N), leaving behind only innocuous volatile byproducts. Depending on the structures of the bis-phosphines, the cobalt(I) complex crystallizes as a phosphine-bridged species [(P∼P)(X)CoI[μ-(P∼P)]CoI(X)(P∼P)] or a halide-bridged species [(P∼P)CoI[μ-(X)]2CoI(P∼P)]. Because the side-products are innocuous, these methods can be used for the in situ generation of catalytically competent Co(I) complexes for a variety of low-valent cobalt-catalyzed reactions of even sensitive substrates. These complexes are also useful for the synthesis of rare cationic [(P∼P)CoI-η4-diene]+ X- or [(P∼P)CoI-η6-arene]+ X- complexes, which are shown to be excellent single-component catalysts for the following regioselective reactions of dienes: heterodimerizations with ethylene or methyl acrylate, hydroacylation and hydroboration. The reactivity of the single-component catalysts with the in situ generated species are also documented.
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Affiliation(s)
- Mahesh M Parsutkar
- Department of Chemistry and Biochemistry, The Ohio State University, 100 West 18th Avenue, Columbus, Ohio 43210, USA.
| | - Curtis E Moore
- Department of Chemistry and Biochemistry, The Ohio State University, 100 West 18th Avenue, Columbus, Ohio 43210, USA.
| | - T V RajanBabu
- Department of Chemistry and Biochemistry, The Ohio State University, 100 West 18th Avenue, Columbus, Ohio 43210, USA.
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6
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7
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Whitehurst WG, Kim J, Koenig SG, Chirik PJ. Three-Component Coupling of Arenes, Ethylene, and Alkynes Catalyzed by a Cationic Bis(phosphine) Cobalt Complex: Intercepting Metallacyclopentenes for C-H Functionalization. J Am Chem Soc 2022; 144:4530-4540. [PMID: 35245039 PMCID: PMC8931730 DOI: 10.1021/jacs.1c12646] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
![]()
A cobalt-catalyzed
intermolecular three-component coupling of arenes,
ethylene, and alkynes was developed using the well-defined air-stable
cationic bis(phosphine) cobalt(I) complex, [(dcype)Co(η6-C7H8)][BArF4]
(dcype = 1,2-bis(dicyclohexylphosphino)ethane; BArF4 = B[(3,5-(CF3)2)C6H3]4), as the precatalyst. All three components were
required for turnover and formation of ortho-homoallylated
arene products. A range of directing groups including amide, ketone,
and 2-pyridyl substituents on the arene promoted the reaction. The
cobalt-catalyzed method exhibited broad functional group tolerance
allowing for the late-stage functionalization of two drug molecules,
fenofibrate and haloperidol. A series of control reactions, deuterium
labeling studies, resting state analysis, as well as synthesis of
substrate- and product-bound η6-arene complexes supported
a pathway involving C(sp2)–H activation from a cobalt(III) metallacycle.
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Affiliation(s)
- William G Whitehurst
- Department of Chemistry, Frick Laboratory, Princeton University, Princeton, New Jersey 08544, United States
| | - Junho Kim
- Department of Chemistry, Frick Laboratory, Princeton University, Princeton, New Jersey 08544, United States
| | - Stefan G Koenig
- Small Molecule Process Chemistry, Genentech Inc., 1 DNA Way, South San Francisco, California 94080, United States
| | - Paul J Chirik
- Department of Chemistry, Frick Laboratory, Princeton University, Princeton, New Jersey 08544, United States
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8
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Munakala A, Nallamilli T, Nanubolu JB, Chegondi R. Steric- and Electronic-Controlled Intramolecular [2 + 2]-Cycloaddition of Cyclohexadienone-Containing 1,7-Enynes. Org Lett 2022; 24:892-896. [PMID: 35023756 DOI: 10.1021/acs.orglett.1c04232] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
Herein we have developed the silver-catalyzed electronic- and steric-controlled intramolecular formal [2 + 2]-cycloaddition of alkyne-tethered cyclohexadienones. Substrates with electron-rich alkynes and a less hindered quaternary carbon center afford tricyclic fused cyclobutenes through 1,7-enyne cyclization. In contrast, the formation of dihydrofurans was observed from electron-deficient alkynes via proton abstraction/C-O bond cleavage. The synthetic potential of this method was also broadened with a gram-scale reaction and various transformations on cyclobutene.
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Affiliation(s)
- Anandarao Munakala
- Academy of Scientific and Innovative Research (AcSIR), Ghaziabad 201002, India
| | - Tarun Nallamilli
- Academy of Scientific and Innovative Research (AcSIR), Ghaziabad 201002, India
| | | | - Rambabu Chegondi
- Academy of Scientific and Innovative Research (AcSIR), Ghaziabad 201002, India
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9
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Arai S, Inagaki S, Nakajima M, Nishida A. Regio-divergent nickel catalysis: intramolecular [4+2] and [2+2] cycloaddition reactions between vinylallenes and alkynes. Chem Commun (Camb) 2021; 57:11268-11271. [PMID: 34635883 DOI: 10.1039/d1cc03942c] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Vinylallenes have been recognized as versatile C2 and C4 components for nickel-catalyzed intramolecular [4+2] and [2+2] cycloadditions. The former reaction was promoted by a Ni(0) complex (up to quantitative yield), and a Ni(II) salt was a key species for the latter reaction to give the corresponding regio- and stereocontrolled cycloadducts (up to 88% yield). DFT studies revealed that both reaction pathways involve a concerted mechanism through the activation of different C-C multiple bonds in the substrates.
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Affiliation(s)
- Shigeru Arai
- Graduate School of Pharmaceutical Sciences, Chiba University 1-8-1 Inohana, Chuo-ku, Chiba, 260-8675, Japan. .,Molecular Chirality Research Center, Chiba University, 1-33, Yayoi-cho, Inage-ku, Chiba, 263-8522, Japan
| | - Saki Inagaki
- Graduate School of Pharmaceutical Sciences, Chiba University 1-8-1 Inohana, Chuo-ku, Chiba, 260-8675, Japan.
| | - Masaya Nakajima
- Graduate School of Pharmaceutical Sciences, Chiba University 1-8-1 Inohana, Chuo-ku, Chiba, 260-8675, Japan. .,Molecular Chirality Research Center, Chiba University, 1-33, Yayoi-cho, Inage-ku, Chiba, 263-8522, Japan
| | - Atsushi Nishida
- Graduate School of Pharmaceutical Sciences, Chiba University 1-8-1 Inohana, Chuo-ku, Chiba, 260-8675, Japan. .,Molecular Chirality Research Center, Chiba University, 1-33, Yayoi-cho, Inage-ku, Chiba, 263-8522, Japan
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10
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Hu Y, Zhang Z, Liu Y, Zhang W. Cobalt-Catalyzed Chemo- and Enantioselective Hydrogenation of Conjugated Enynes. Angew Chem Int Ed Engl 2021; 60:16989-16993. [PMID: 34062038 DOI: 10.1002/anie.202106566] [Citation(s) in RCA: 31] [Impact Index Per Article: 10.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/16/2021] [Indexed: 12/11/2022]
Abstract
Asymmetric hydrogenation is one of the most powerful methods for the preparation of single enantiomer compounds. However, the chemo- and enantioselective hydrogenation of the relatively inert unsaturated group in substrates possessing multiple unsaturated bonds remains a challenge. We herein report a protocol for the highly chemo- and enantioselective hydrogenation of conjugated enynes while keeping the alkynyl bond intact. Mechanism studies indicate that the accompanying Zn2+ generated from zinc reduction of the CoII complex plays a critical role to initiate a plausible CoI /CoIII catalytic cycle. This approach allows for the highly efficient generation of chiral propargylamines (up to 99.9 % ee and 2000 S/C) and further useful chemical transformations.
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Affiliation(s)
- Yanhua Hu
- Shanghai Key Laboratory for Molecular Engineering of Chiral Drugs, Frontier Science Center for Transformative Molecules, School of Chemistry and Chemical Engineering, Shanghai Jiao Tong University, 800 Dongchuan Road, Shanghai, 200240, China
| | - Zhenfeng Zhang
- School of Pharmacy, Shanghai Jiao Tong University, 800 Dongchuan Road, Shanghai, 200240, China
| | - Yangang Liu
- Shanghai Key Laboratory for Molecular Engineering of Chiral Drugs, Frontier Science Center for Transformative Molecules, School of Chemistry and Chemical Engineering, Shanghai Jiao Tong University, 800 Dongchuan Road, Shanghai, 200240, China.,School of Pharmacy, Shanghai Jiao Tong University, 800 Dongchuan Road, Shanghai, 200240, China
| | - Wanbin Zhang
- Shanghai Key Laboratory for Molecular Engineering of Chiral Drugs, Frontier Science Center for Transformative Molecules, School of Chemistry and Chemical Engineering, Shanghai Jiao Tong University, 800 Dongchuan Road, Shanghai, 200240, China.,School of Pharmacy, Shanghai Jiao Tong University, 800 Dongchuan Road, Shanghai, 200240, China
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11
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Hu Y, Zhang Z, Liu Y, Zhang W. Cobalt‐Catalyzed Chemo‐ and Enantioselective Hydrogenation of Conjugated Enynes. Angew Chem Int Ed Engl 2021. [DOI: 10.1002/ange.202106566] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Affiliation(s)
- Yanhua Hu
- Shanghai Key Laboratory for Molecular Engineering of Chiral Drugs Frontier Science Center for Transformative Molecules School of Chemistry and Chemical Engineering Shanghai Jiao Tong University 800 Dongchuan Road Shanghai 200240 China
| | - Zhenfeng Zhang
- School of Pharmacy Shanghai Jiao Tong University 800 Dongchuan Road Shanghai 200240 China
| | - Yangang Liu
- Shanghai Key Laboratory for Molecular Engineering of Chiral Drugs Frontier Science Center for Transformative Molecules School of Chemistry and Chemical Engineering Shanghai Jiao Tong University 800 Dongchuan Road Shanghai 200240 China
- School of Pharmacy Shanghai Jiao Tong University 800 Dongchuan Road Shanghai 200240 China
| | - Wanbin Zhang
- Shanghai Key Laboratory for Molecular Engineering of Chiral Drugs Frontier Science Center for Transformative Molecules School of Chemistry and Chemical Engineering Shanghai Jiao Tong University 800 Dongchuan Road Shanghai 200240 China
- School of Pharmacy Shanghai Jiao Tong University 800 Dongchuan Road Shanghai 200240 China
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12
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Wang CS, Sun Q, García F, Wang C, Yoshikai N. Robust Cobalt Catalyst for Nitrile/Alkyne [2+2+2] Cycloaddition: Synthesis of Polyarylpyridines and Their Mechanochemical Cyclodehydrogenation to Nitrogen-Containing Polyaromatics*. Angew Chem Int Ed Engl 2021; 60:9627-9634. [PMID: 33559370 DOI: 10.1002/anie.202017220] [Citation(s) in RCA: 20] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/06/2021] [Indexed: 12/16/2022]
Abstract
The transition-metal-catalyzed [2+2+2] cycloaddition of nitriles and alkynes is an established synthetic approach to pyridines; however, these cycloadditions often rely on the use of tethered diynes or cyanoalkynes as one of the reactants. Thus, examples of efficient, fully intermolecular catalytic [2+2+2] pyridine synthesis, especially those employing unactivated nitriles and internal alkynes leading to pentasubstituted pyridines, remain scarce. Herein, we report on simple and inexpensive catalytic systems based on cobalt(II) iodide, 1,3-bis(diphenylphosphino)propane, and Zn that promote [2+2+2] cycloaddition of various nitriles and diarylacetylenes for the synthesis of a broad range of polyarylated pyridines. DFT studies support a reaction pathway involving oxidative coupling of two alkynes, insertion of the nitrile into a cobaltacyclopentadiene, and C-N reductive elimination. The resulting tetra- and pentaarylpyridines serve as precursors to hitherto unprecedented nitrogen-containing polycyclic aromatic hydrocarbons via mechanochemically assisted multifold reductive cyclodehydrogenation.
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Affiliation(s)
- Chang-Sheng Wang
- Division of Chemistry and Biological Chemistry, School of Physical and Mathematical Sciences, Nanyang Technological University, Singapore, 637371, Singapore
| | - Qiao Sun
- Division of Chemistry and Biological Chemistry, School of Physical and Mathematical Sciences, Nanyang Technological University, Singapore, 637371, Singapore
| | - Felipe García
- Division of Chemistry and Biological Chemistry, School of Physical and Mathematical Sciences, Nanyang Technological University, Singapore, 637371, Singapore
| | - Chen Wang
- Zhejiang Key Laboratory of Alternative Technologies for Fine Chemical Process, Shaoxing University, Shaoxing, 312000, P. R. China
| | - Naohiko Yoshikai
- Division of Chemistry and Biological Chemistry, School of Physical and Mathematical Sciences, Nanyang Technological University, Singapore, 637371, Singapore
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13
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Wang C, Sun Q, García F, Wang C, Yoshikai N. Robust Cobalt Catalyst for Nitrile/Alkyne [2+2+2] Cycloaddition: Synthesis of Polyarylpyridines and Their Mechanochemical Cyclodehydrogenation to Nitrogen‐Containing Polyaromatics**. Angew Chem Int Ed Engl 2021. [DOI: 10.1002/ange.202017220] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Chang‐Sheng Wang
- Division of Chemistry and Biological Chemistry School of Physical and Mathematical Sciences Nanyang Technological University Singapore 637371 Singapore
| | - Qiao Sun
- Division of Chemistry and Biological Chemistry School of Physical and Mathematical Sciences Nanyang Technological University Singapore 637371 Singapore
| | - Felipe García
- Division of Chemistry and Biological Chemistry School of Physical and Mathematical Sciences Nanyang Technological University Singapore 637371 Singapore
| | - Chen Wang
- Zhejiang Key Laboratory of Alternative Technologies for Fine Chemical Process Shaoxing University Shaoxing 312000 P. R. China
| | - Naohiko Yoshikai
- Division of Chemistry and Biological Chemistry School of Physical and Mathematical Sciences Nanyang Technological University Singapore 637371 Singapore
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14
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Kennedy CR, Joannou MV, Steves JE, Hoyt JM, Kovel CB, Chirik PJ. Iron-Catalyzed Vinylsilane Dimerization and Cross-Cycloadditions with 1,3-Dienes: Probing the Origins of Chemo- and Regioselectivity. ACS Catal 2021; 11:1368-1379. [PMID: 34336370 PMCID: PMC8317497 DOI: 10.1021/acscatal.0c04608] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Abstract
The selective, intermolecular, homodimerization and cross-cycloaddition of vinylsilanes with unbiased 1,3-dienes, catalyzed by a pyridine-2,6-diimine (PDI) iron complex is described. In the absence of a diene coupling partner, vinylsilane hydroalkenylation products were obtained chemoselectively with unusual head-to-head regioselectivity (up to >98% purity, 98:2 E/Z). In the presence of a 4- or 2-substituted diene coupling partner, under otherwise identical reaction conditions, formation of value-added [2+2]- and [4+2]-cycloadducts, respectively, was observed. The chemoselectivity profile was distinct from that observed for analogous α-olefin dimerization and cross-reactions with 1,3-dienes. Mechanistic studies conducted with well-defined, single-component precatalysts (MePDI)Fe(L2) (where MePDI = 2,6-(2,6-Me2-C6H3N═CMe)2C5H3N; L2 = butadiene or 2(N2)) provided insights into the kinetic and thermodynamic factors contributing to the substrate-controlled regioselectivity for both the homodimerization and cross cycloadditions. Diamagnetic iron diene and paramagnetic iron olefin complexes were identified as catalyst resting states, were characterized by in situ NMR and Mössbauer spectroscopic studies, and were corroborated with DFT calculations. Stoichiometric reactions and computational models provided evidence for a common mechanistic regime where competing steric and orbital-symmetry requirements dictate the regioselectivity of oxidative cyclization. Although distinct chemoselectivity profiles were observed in cross-cycloadditions with the vinylsilane congeners of α-olefins, these products arose from metallacycles with the same connectivity. The silyl substituents ultimately governed the relative rates of β-H elimination and C-C reductive elimination to dictate final product formation.
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Affiliation(s)
| | | | | | - Jordan M. Hoyt
- Department of Chemistry, Princeton University, Princeton, NJ 08544
| | - Carli B. Kovel
- Department of Chemistry, Princeton University, Princeton, NJ 08544
| | - Paul J. Chirik
- Department of Chemistry, Princeton University, Princeton, NJ 08544
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15
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Le A, Lee D. Selectivity between an Alder–ene reaction and a [2 + 2] cycloaddition in the intramolecular reactions of allene-tethered arynes. Org Chem Front 2021. [DOI: 10.1039/d1qo00459j] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
Abstract
Substituent-dependent reactivity and selectivity in the intramolecular reactions of arynes tethered with an allene are described.
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Affiliation(s)
- Anh Le
- Department of Chemistry
- University of Illinois at Chicago
- Chicago
- USA
| | - Daesung Lee
- Department of Chemistry
- University of Illinois at Chicago
- Chicago
- USA
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16
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Li J, Cui M, Tian R, Duan Z, Mathey F. Cycloadditions of 1-iminylphosphirane complexes with allenes. CHINESE CHEM LETT 2021. [DOI: 10.1016/j.cclet.2020.05.026] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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17
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Zhang K, Zhang Q, Wei D, Tian R, Duan Z. Hetero-Diels–Alder reactions of 2 H-phospholes with allenes: synthesis and functionalization of 6-methylene-1-phosphanorbornenes. Org Chem Front 2021. [DOI: 10.1039/d1qo00535a] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The phospha-Diels–Alder reaction between 2H-phospholes and arylallenes affords 6-methylene-1-phosphanorbornenes in high yields with excellent regioselectivity. Further functionalization provides a 1-phosphanorbornene modified PCH2CH2P skeleton.
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Affiliation(s)
- Keke Zhang
- College of Chemistry
- Green Catalysis Center
- International Phosphorus Laboratory
- International Joint Research Laboratory for Functional Organophosphorus Materials of Henan Province
- Zhengzhou University
| | - Qiaoyu Zhang
- College of Chemistry
- Green Catalysis Center
- International Phosphorus Laboratory
- International Joint Research Laboratory for Functional Organophosphorus Materials of Henan Province
- Zhengzhou University
| | - Donghui Wei
- College of Chemistry
- Green Catalysis Center
- International Phosphorus Laboratory
- International Joint Research Laboratory for Functional Organophosphorus Materials of Henan Province
- Zhengzhou University
| | - Rongqiang Tian
- College of Chemistry
- Green Catalysis Center
- International Phosphorus Laboratory
- International Joint Research Laboratory for Functional Organophosphorus Materials of Henan Province
- Zhengzhou University
| | - Zheng Duan
- College of Chemistry
- Green Catalysis Center
- International Phosphorus Laboratory
- International Joint Research Laboratory for Functional Organophosphorus Materials of Henan Province
- Zhengzhou University
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18
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Maikhuri VK, Prasad AK, Jha A, Srivastava S. Recent advances in the transition metal catalyzed synthesis of quinoxalines: a review. NEW J CHEM 2021. [DOI: 10.1039/d1nj01442k] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
This review summarizes the recent developments in the synthesis of a variety of substituted quinoxalines using transition metal catalysts.
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Affiliation(s)
- Vipin K. Maikhuri
- Bioorganic Laboratory
- Department of Chemistry
- University of Delhi
- Delhi 110007
- India
| | - Ashok K. Prasad
- Bioorganic Laboratory
- Department of Chemistry
- University of Delhi
- Delhi 110007
- India
| | - Amitabh Jha
- Department of Chemistry
- Acadia University
- Wolfville
- Canada
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19
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Wan F, Tang W. Cobalt-Catalyzed Chemo- and Enantio-selective Hydrogenation of Conjugated Enynes. CHINESE J ORG CHEM 2021. [DOI: 10.6023/cjoc202100063] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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20
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Ni Q, Song X, Png CW, Zhang Y, Zhao Y. Access to substituted cyclobutenes by tandem [3,3]-sigmatropic rearrangement/[2 + 2] cycloaddition of dipropargylphosphonates under Ag/Co relay catalysis. Chem Sci 2020; 11:12329-12335. [PMID: 34094441 PMCID: PMC8162479 DOI: 10.1039/d0sc02972f] [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: 05/27/2020] [Accepted: 10/16/2020] [Indexed: 11/21/2022] Open
Abstract
We present herein an unconventional tandem [3,3]-sigmatropic rearrangement/[2 + 2] cycloaddition of simple dipropargylphosphonates to deliver a range of bicyclic polysubstituted cyclobutenes and cyclobutanes under Ag/Co relay catalysis. An interesting switch from allene-allene to allene-alkyne cycloaddition was observed based on the substitution of the substrates, which further diversified the range of compounds accessible from this practical method. Significantly, preliminary biological screening of these new compounds identified promising candidates as suppressors of cellular proliferation.
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Affiliation(s)
- Qijian Ni
- Key Laboratory of Functionalized Molecular Solids, Ministry of Education, Anhui Key Laboratory of Molecule-Based Materials (State Key Laboratory Cultivation Base), College of Chemistry and Materials Science, Anhui Normal University Wuhu 241002 Anhui China
- Department of Chemistry, National University of Singapore 3 Science Drive 3 Singapore 117543 Singapore
| | - Xiaoxiao Song
- Key Laboratory of Functionalized Molecular Solids, Ministry of Education, Anhui Key Laboratory of Molecule-Based Materials (State Key Laboratory Cultivation Base), College of Chemistry and Materials Science, Anhui Normal University Wuhu 241002 Anhui China
- Department of Chemistry, National University of Singapore 3 Science Drive 3 Singapore 117543 Singapore
| | - Chin Wen Png
- Centre for Life Sciences, National University of Singapore #03-09, 28 Medical Drive 117456 Singapore
| | - Yongliang Zhang
- Centre for Life Sciences, National University of Singapore #03-09, 28 Medical Drive 117456 Singapore
| | - Yu Zhao
- Department of Chemistry, National University of Singapore 3 Science Drive 3 Singapore 117543 Singapore
- Joint School of National University of Singapore and Tianjin University, International Campus of Tianjin University Binhai New City Fuzhou 350207 China
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21
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Gore BS, Kuo CY, Garkhedkar AM, Chang YL, Wang JJ. Metal-Free Solvent/Base-Switchable Divergent Synthesis of Multisubstituted Dihydrofurans. Org Lett 2020; 22:6160-6165. [DOI: 10.1021/acs.orglett.0c02240] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Affiliation(s)
- Babasaheb Sopan Gore
- Department of Medicinal and Applied Chemistry, Kaohsiung Medical University, No. 100, Shiquan First Road, Sanmin District, Kaohsiung City, 807, Taiwan
| | - Chiao-Ying Kuo
- Department of Medicinal and Applied Chemistry, Kaohsiung Medical University, No. 100, Shiquan First Road, Sanmin District, Kaohsiung City, 807, Taiwan
| | - Amol Milind Garkhedkar
- Department of Medicinal and Applied Chemistry, Kaohsiung Medical University, No. 100, Shiquan First Road, Sanmin District, Kaohsiung City, 807, Taiwan
| | - Yu-Lun Chang
- Department of Medicinal and Applied Chemistry, Kaohsiung Medical University, No. 100, Shiquan First Road, Sanmin District, Kaohsiung City, 807, Taiwan
| | - Jeh-Jeng Wang
- Department of Medicinal and Applied Chemistry, Kaohsiung Medical University, No. 100, Shiquan First Road, Sanmin District, Kaohsiung City, 807, Taiwan
- Department of Medical Research, Kaohsiung Medical University Hospital, No. 100, Tzyou First Road, Sanmin District, Kaohsiung City, 807, Taiwan
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22
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Wang CS, Di Monaco S, Thai AN, Rahman MS, Pang BP, Wang C, Yoshikai N. Cobalt/Lewis Acid Catalysis for Hydrocarbofunctionalization of Alkynes via Cooperative C-H Activation. J Am Chem Soc 2020; 142:12878-12889. [PMID: 32573213 DOI: 10.1021/jacs.0c06412] [Citation(s) in RCA: 42] [Impact Index Per Article: 10.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
A catalytic system comprising a cobalt-diphosphine complex and a Lewis acid (LA) such as AlMe3 has been found to promote hydrocarbofunctionalization reactions of alkynes with Lewis basic and electron-deficient substrates such as formamides, pyridones, pyridines and related azines, imidazo[1,2-a]pyridines, and azole derivatives through site-selective C-H activation. Compared with known Ni/LA catalytic systems for analogous transformations, the present catalytic systems not only feature convenient setup using inexpensive and bench-stable precatalyst and ligand such as Co(acac)3 and 1,3-bis(diphenylphosphino)propane (dppp) but also display distinct site-selectivity toward C-H activation of pyridone and pyridine derivatives. In particular, a completely C4-selective alkenylation of pyridine has been achieved for the first time. Meanwhile, the present catalytic system proved to promote exclusively C5-selective alkenylation of imidazo[1,2-a]pyridine derivatives. Mechanistic studies including DFT calculations on the Co/Al-catalyzed addition of formamide to alkyne have suggested that the reaction involves cleavage of the carbamoyl C-H bond as the rate-limiting step, which proceeds through a ligand-to-ligand hydrogen transfer (LLHT) mechanism leading to an alkenyl(carbamoyl)cobalt intermediate.
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Affiliation(s)
- Chang-Sheng Wang
- Division of Chemistry and Biological Chemistry, School of Physical and Mathematical Sciences, Nanyang Technological University, Singapore 637371, Singapore
| | - Sabrina Di Monaco
- Division of Chemistry and Biological Chemistry, School of Physical and Mathematical Sciences, Nanyang Technological University, Singapore 637371, Singapore
| | - Anh Ngoc Thai
- Division of Chemistry and Biological Chemistry, School of Physical and Mathematical Sciences, Nanyang Technological University, Singapore 637371, Singapore
| | - Md Shafiqur Rahman
- Division of Chemistry and Biological Chemistry, School of Physical and Mathematical Sciences, Nanyang Technological University, Singapore 637371, Singapore
| | - Benjamin Piaoxiang Pang
- Division of Chemistry and Biological Chemistry, School of Physical and Mathematical Sciences, Nanyang Technological University, Singapore 637371, Singapore
| | - Chen Wang
- Division of Chemistry and Biological Chemistry, School of Physical and Mathematical Sciences, Nanyang Technological University, Singapore 637371, Singapore.,Zhejiang Key Laboratory of Alternative Technologies for Fine Chemical Process, Shaoxing University, Shaoxing 312000, P. R. China
| | - Naohiko Yoshikai
- Division of Chemistry and Biological Chemistry, School of Physical and Mathematical Sciences, Nanyang Technological University, Singapore 637371, Singapore
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23
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Lv S, Liu H, Kang J, Luo Y, Gong T, Dong Z, Sun G, He C, Sun X, Wang L. Palladium-catalyzed enol/enolate directed oxidative annulation: functionalized naphthofuroquinone synthesis and bioactivity evaluation. Chem Commun (Camb) 2020; 55:14729-14732. [PMID: 31690911 DOI: 10.1039/c9cc05233j] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A palladium-promoted oxidative annulation reaction for the synthesis of structurally diverse naphthoquinone-containing heterocycles has been developed, providing switchable access to 1,2-naphthofuroquinones and densely functionalized cyclobutene-fused 1,4-naphthofuroquinones by selective enol/enolate-directed processes. The synthetic application was extended by late-stage functionalization of an anti-HIV drug. The practical value of 1,2-naphthofuroquinone synthesis was highlighted in endothelial protective lead compound development.
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Affiliation(s)
- Shuaipeng Lv
- Institute of Medicinal Plant Development, Chinese Academy of Medical Science & Peking Union Medical College, Beijing 100193, P. R. China.
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24
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Sang HL, Wu C, Phua GGD, Ge S. Cobalt-Catalyzed Regiodivergent Stereoselective Hydroboration of 1,3-Diynes To Access Boryl-Functionalized Enynes. ACS Catal 2019. [DOI: 10.1021/acscatal.9b03139] [Citation(s) in RCA: 33] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Affiliation(s)
- Hui Leng Sang
- Department of Chemistry, National University of Singapore, 3 Science Drive 3, Singapore 117543, Singapore
| | - Caizhi Wu
- Department of Chemistry, National University of Singapore, 3 Science Drive 3, Singapore 117543, Singapore
| | - Guan Ge Darren Phua
- Department of Chemistry, National University of Singapore, 3 Science Drive 3, Singapore 117543, Singapore
| | - Shaozhong Ge
- Department of Chemistry, National University of Singapore, 3 Science Drive 3, Singapore 117543, Singapore
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25
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Parsutkar MM, Pagar VV, RajanBabu TV. Catalytic Enantioselective Synthesis of Cyclobutenes from Alkynes and Alkenyl Derivatives. J Am Chem Soc 2019; 141:15367-15377. [PMID: 31476274 DOI: 10.1021/jacs.9b07885] [Citation(s) in RCA: 48] [Impact Index Per Article: 9.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
Discovery of enantioselective catalytic reactions for the preparation of chiral compounds from readily available precursors, using scalable and environmentally benign chemistry, can greatly impact their design, synthesis, and eventually manufacture on scale. Functionalized cyclobutanes and cyclobutenes are important structural motifs seen in many bioactive natural products and pharmaceutically relevant small molecules. They are also useful precursors for other classes of organic compounds such as other cycloalkane derivatives, heterocyclic compounds, stereodefined 1,3-dienes, and ligands for catalytic asymmetric synthesis. The simplest approach to make cyclobutenes is through an enantioselective [2 + 2]-cycloaddition between an alkyne and an alkenyl derivative, a reaction which has a long history. Yet known reactions of this class that give acceptable enantioselectivities are of very narrow scope and are strictly limited to activated alkynes and highly reactive alkenes. Here, we disclose a broadly applicable enantioselective [2 + 2]-cycloaddition between wide variety of alkynes and alkenyl derivatives, two of the most abundant classes of organic precursors. The key cycloaddition reaction employs catalysts derived from readily synthesized ligands and an earth-abundant metal, cobalt. Over 50 different cyclobutenes with enantioselectivities in the range of 86-97% ee are documented. With the diverse functional groups present in these compounds, further diastereoselective transformations are easily envisaged for synthesis of highly functionalized cyclobutanes and cyclobutenes. Some of the novel observations made during these studies including a key role of a cationic Co(I)-intermediate, ligand and counterion effects on the reactions, can be expected to have broad implications in homogeneous catalysis beyond the highly valuable synthetic intermediates that are accessible by this route.
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Affiliation(s)
- Mahesh M Parsutkar
- Department of Chemistry and Biochemistry , The Ohio State University , 100 West 18th Avenue , Columbus , Ohio 43210 , United States
| | - Vinayak Vishnu Pagar
- Department of Chemistry and Biochemistry , The Ohio State University , 100 West 18th Avenue , Columbus , Ohio 43210 , United States
| | - T V RajanBabu
- Department of Chemistry and Biochemistry , The Ohio State University , 100 West 18th Avenue , Columbus , Ohio 43210 , United States
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26
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Arai S, Izaki A, Amako Y, Nakajima M, Uchiyama M, Nishida A. Regioselective [2+2+2] Cycloaddition Reaction Using Allene‐ynes with Simple Allenes under Nickel Catalysis. Adv Synth Catal 2019. [DOI: 10.1002/adsc.201900719] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Shigeru Arai
- Graduate School of Pharmaceutical SciencesChiba University 1-8-1 Inohana Chuo-ku, Chiba Japan
- Molecular Chirality Research CenterChiba University 1–33 Yayoi-cho, Inage-ku Chiba Japan
| | - Arisa Izaki
- Graduate School of Pharmaceutical SciencesChiba University 1-8-1 Inohana Chuo-ku, Chiba Japan
| | - Yuka Amako
- Graduate School of Pharmaceutical SciencesChiba University 1-8-1 Inohana Chuo-ku, Chiba Japan
| | - Masaya Nakajima
- Graduate School of Pharmaceutical SciencesChiba University 1-8-1 Inohana Chuo-ku, Chiba Japan
- Cluster for Pioneering Research (CPR)Advanced Elements Chemistry Laboratory, RIKEN, 2-1, Hirosawa, Wako Saitama Japan
| | - Masanobu Uchiyama
- Graduate School of Pharmaceutical SciencesThe University of Tokyo 7-3-1 Hongo, Bunkyo-ku Tokyo Japan
- Cluster for Pioneering Research (CPR)Advanced Elements Chemistry Laboratory, RIKEN, 2-1, Hirosawa, Wako Saitama Japan
| | - Atsushi Nishida
- Graduate School of Pharmaceutical SciencesChiba University 1-8-1 Inohana Chuo-ku, Chiba Japan
- Molecular Chirality Research CenterChiba University 1–33 Yayoi-cho, Inage-ku Chiba Japan
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27
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Ding W, Ho YKT, Okuda Y, Wijaya CK, Tan ZH, Yoshikai N. Cobalt-Catalyzed Hydroacylative Dimerization of Allenes Leading to Skipped Dienes. Org Lett 2019; 21:6173-6178. [PMID: 31334661 DOI: 10.1021/acs.orglett.9b02465] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
Abstract
A cobalt-diphosphine catalyst has been found to promote a selective 1:2 coupling reaction between aldehydes and allenes to form β,δ-dialkylidene ketones, featuring skipped diene moieties, with high regioselectivities and stereoselectivities. The reaction is distinct from previously reported, rhodium-catalyzed aldehyde-allene 1:2 coupling to afford β,γ-dialkylidene ketones bearing 1,3-diene moieties. The present hydroacylative dimerization involves a unique allene/allene oxidative cyclization mode to form a C1-C2 linkage between the allene molecules.
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Affiliation(s)
- Wei Ding
- Division of Chemistry and Biological Chemistry, School of Physical and Mathematical Sciences , Nanyang Technological University , Singapore 637371 , Singapore
| | - Yan King Terence Ho
- Division of Chemistry and Biological Chemistry, School of Physical and Mathematical Sciences , Nanyang Technological University , Singapore 637371 , Singapore
| | - Yasuhiro Okuda
- Division of Chemistry and Biological Chemistry, School of Physical and Mathematical Sciences , Nanyang Technological University , Singapore 637371 , Singapore.,Department of Applied Chemistry and Biotechnology, Faculty of Engineering , Okayama University of Science , 1-1 Ridai-cho , Kita-ku , Okayama 700-0005 , Japan
| | - Christopher Kevin Wijaya
- Division of Chemistry and Biological Chemistry, School of Physical and Mathematical Sciences , Nanyang Technological University , Singapore 637371 , Singapore
| | - Zheng Hao Tan
- Division of Chemistry and Biological Chemistry, School of Physical and Mathematical Sciences , Nanyang Technological University , Singapore 637371 , Singapore
| | - Naohiko Yoshikai
- Division of Chemistry and Biological Chemistry, School of Physical and Mathematical Sciences , Nanyang Technological University , Singapore 637371 , Singapore
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28
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Yang J, Sekiguchi Y, Yoshikai N. Cobalt-Catalyzed Enantioselective and Chemodivergent Addition of Cyclopropanols to Oxabicyclic Alkenes. ACS Catal 2019. [DOI: 10.1021/acscatal.9b00655] [Citation(s) in RCA: 50] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Affiliation(s)
- Junfeng Yang
- Division of Chemistry and Biological Chemistry, School of Physical and Mathematical Sciences, Nanyang Technological University, Singapore 637371, Singapore
| | - Yoshiya Sekiguchi
- Division of Chemistry and Biological Chemistry, School of Physical and Mathematical Sciences, Nanyang Technological University, Singapore 637371, Singapore
| | - Naohiko Yoshikai
- Division of Chemistry and Biological Chemistry, School of Physical and Mathematical Sciences, Nanyang Technological University, Singapore 637371, Singapore
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29
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Aguilar E, Santamaría J. Gold-catalyzed heterocyclic syntheses through α-imino gold carbene complexes as intermediates. Org Chem Front 2019. [DOI: 10.1039/c9qo00243j] [Citation(s) in RCA: 82] [Impact Index Per Article: 16.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
Abstract
This review reports a comprehensive compilation of gold-catalyzed heterocyclic synthesis by using α-imino gold carbene complexes as the proposed intermediates.
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Affiliation(s)
- Enrique Aguilar
- Instituto Universitario de Química Organometálica “Enrique Moles”
- Departamento de Química Orgánica e Inorgánica
- Universidad de Oviedo
- Oviedo
- Spain
| | - Javier Santamaría
- Instituto Universitario de Química Organometálica “Enrique Moles”
- Departamento de Química Orgánica e Inorgánica
- Universidad de Oviedo
- Oviedo
- Spain
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