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Liang Z, Liang H. Synthesis of Nano-Structured Conjugated Polymers with Multiple Micro-/Meso-Pores by the Post-Crosslinking of End-Functionalized Hyperbranched Conjugated Polymers. Polymers (Basel) 2024; 16:1192. [PMID: 38732661 DOI: 10.3390/polym16091192] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/03/2024] [Revised: 04/19/2024] [Accepted: 04/22/2024] [Indexed: 05/13/2024] Open
Abstract
A nano-structured conjugated polymer with multiple micro-/meso-pores was synthesized by post-crosslinking of an end-functionalized hyperbranched conjugated prepolymer. Firstly, an AB2 monomer 3-((3,5-dibromo-4-(octyloxy)phenyl)ethynyl)-6-ethynyl-9-octyl-9H-carbazole (PECz) was synthesized and polymerized by Sonogashira reaction to give the -Br end-functionalized hyperbranched conjugated prepolymer hb-PPECz. The photophysical and electrochemical properties of hb-PPECz were investigated. The λmax of absorption and emission of hb-PPECz in tetrahydrofuran (THF) solution was 313 and 483 nm, respectively. The optical energy bandgap, highest occupied molecular orbital (HOMO), and lowest unoccupied molecular orbital (LUMO) energy levels of hb-PPECz were 2.98, -5.81, and -2.83 eV, respectively. Then, the prepolymer hb-PPECz was post-crosslinked by Heck reaction with divinylbenzene to give the porous conjugated polymer c-PPECz. The effects of hb-PPECz concentration and added dispersant polyvinylpyrrolidone (PVP K-30) on the morphology and porosity of c-PPECz were investigated. The resulting c-PPECzs showed multiple porous structures mainly constructed by micropores and mesopores. Under a higher hb-PPECz concentration (4 wt/v%), a bulky gel product was obtained. Under lower hb-PPECz concentrations (0.6 wt/v%~2 wt/v%), the resulting c-PPECzs were mainly composed of nano-sized particles. Nearly spheric nanoparticles (200~300 nm) (c-PPECz-5) were obtained under the concentration of 1 wt/v% in the presence of PVP (10 wt% of hb-PPECz). The Brunauer-Emmett-Teller (BET) surface area, pore volume, average pore size, and percentage of pore size below 10 nm of c-PPECz-5 were 10.7781 m2·g-1, 0.0108 cm3·g-1, 4.0081 nm, and 94.47%, respectively.
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Affiliation(s)
- Zhenfeng Liang
- Key Laboratory of Designed Synthesis and Application of Polymer Materials (DSAPM Lab), Key Laboratory for Polymer Composite and Functional Materials of Ministry of Education (PCFM Lab), School of Chemistry, Sun Yat-sen University, Guangzhou 510006, China
| | - Hui Liang
- Key Laboratory of Designed Synthesis and Application of Polymer Materials (DSAPM Lab), Key Laboratory for Polymer Composite and Functional Materials of Ministry of Education (PCFM Lab), School of Chemistry, Sun Yat-sen University, Guangzhou 510006, China
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2
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Niu J, Wang Y, Yan S, Zhang Y, Ma X, Zhang Q, Zhang W. One-pot Ugi-azide and Heck reactions for the synthesis of heterocyclic systems containing tetrazole and 1,2,3,4-tetrahydroisoquinoline. Beilstein J Org Chem 2024; 20:912-920. [PMID: 38711586 PMCID: PMC11070971 DOI: 10.3762/bjoc.20.81] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/17/2024] [Accepted: 04/11/2024] [Indexed: 05/08/2024] Open
Abstract
A new method for the synthesis of heterocyclic systems containing tetrazole and tetrahydroisoquinoline is developed via the performance of one-pot Ugi-azide and Heck cyclization reactions. The integration of the multicomponent and post-condensation reactions in one-pot maximizes the pot-, atom-, and step-economy (PASE).
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Affiliation(s)
- Jiawei Niu
- School of Pharmacy, Changzhou University, 1 Gehu Road, Changzhou 213164, China
| | - Yuhui Wang
- School of Pharmacy, Changzhou University, 1 Gehu Road, Changzhou 213164, China
| | - Shenghu Yan
- School of Pharmacy, Changzhou University, 1 Gehu Road, Changzhou 213164, China
| | - Yue Zhang
- School of Pharmacy, Changzhou University, 1 Gehu Road, Changzhou 213164, China
| | - Xiaoming Ma
- School of Pharmacy, Changzhou University, 1 Gehu Road, Changzhou 213164, China
| | - Qiang Zhang
- School of Chemistry and Life Sciences, Suzhou University of Science and Technology, 99 Xuefu Road, Suzhou 215009, China
| | - Wei Zhang
- Department of Chemistry and Center for Green Chemistry, University of Massachusetts Boston, 100 Morrissey Blvd, Boston, MA 02125, USA
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3
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Shoemaker AH, Foker EA, Uttaro EP, Beitel SK, Griffith DR. Synthesis of 7-azabicyclo[4.3.1]decane ring systems from tricarbonyl(tropone)iron via intramolecular Heck reactions. Beilstein J Org Chem 2023; 19:1615-1619. [PMID: 37915560 PMCID: PMC10616702 DOI: 10.3762/bjoc.19.118] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/26/2023] [Accepted: 10/10/2023] [Indexed: 11/03/2023] Open
Abstract
The 7-azabicyclo[4.3.1]decane ring system, common to a number of biologically active alkaloids, was accessed from tropone (via its η4-diene complex with Fe(CO)3) in a short sequence of steps: 1) nucleophilic amine addition and subsequent Boc-protection, 2) photochemical demetallation of the iron complex, and 3) an intramolecular Heck reaction. Minor modifications to the protocol enabled access to the related 2-azabicyclo[4.4.1]undecane system, albeit in lower yield.
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Affiliation(s)
- Aaron H Shoemaker
- Department of Chemistry, Lafayette College, 730 High St., Easton, PA 18042, USA
| | - Elizabeth A Foker
- Department of Chemistry, Lafayette College, 730 High St., Easton, PA 18042, USA
| | - Elena P Uttaro
- Department of Chemistry, Lafayette College, 730 High St., Easton, PA 18042, USA
| | - Sarah K Beitel
- Department of Chemistry, Lafayette College, 730 High St., Easton, PA 18042, USA
| | - Daniel R Griffith
- Department of Chemistry, Lafayette College, 730 High St., Easton, PA 18042, USA
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4
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Campisciano V, Valentino L, Laura Alfieri M, La Parola V, Napolitano A, Giacalone F, Gruttadauria M. Highly Functionalized SWCNTs with a Dopamine Derivative as a Support for Pd Nanoparticles: A Recyclable Catalyst for the Reduction of Nitro Compounds and the Heck Reaction. Chemistry 2023; 29:e202301238. [PMID: 37518681 DOI: 10.1002/chem.202301238] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/19/2023] [Revised: 07/29/2023] [Accepted: 07/30/2023] [Indexed: 08/01/2023]
Abstract
Single-walled carbon nanotubes (SWCNTs) were functionalized with a dopamine derivative in which the amine group was converted to azide (dopamine azide). The direct reaction of SWCNTs and dopamine azide in o-dichlorobenzene at high temperature (160 °C) led to very highly functionalized CNTs (≈60 wt.%). Surprisingly, despite this high degree of functionalization, Raman spectroscopy detected a low disruption of the π-network of the carbonaceous support. This finding was justified by the rehybridization from sp3 to sp2 of the sidewall carbon atoms of CNTs involved in the functionalization process. Further characterization by means of different techniques such as X-ray photoelectron spectroscopy (XPS) analysis and transmission electron microscopy (TEM) allowed to shed some light on the chemical composition and morphology of the obtained material. Moreover, the estimation of the total content of phenolic units and their reducing potential after CNTs functionalization was also assessed using Folin and Ciocalteu and 2,2-diphenyl-1-picryl hydrazide (DPPH) assays. The functionalization of CNTs was exploited to immobilize palladium(II) species that were subsequently reduced with NaBH4 leading to the formation of Pd nanoparticles (NPs). The so obtained hybrid material was used as a recyclable heterogeneous catalyst for the reduction of nitro compounds and the Heck reaction.
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Affiliation(s)
- Vincenzo Campisciano
- Department of Biological, Chemical and Pharmaceutical Sciences and Technologies (STEBICEF) and INSTM UdR - Palermo, University of Palermo, Viale delle Scienze, Ed. 17, 90128, Palermo, Italy
| | - Laura Valentino
- Department of Biological, Chemical and Pharmaceutical Sciences and Technologies (STEBICEF) and INSTM UdR - Palermo, University of Palermo, Viale delle Scienze, Ed. 17, 90128, Palermo, Italy
| | - Maria Laura Alfieri
- Department of Chemical Sciences, University of Naples "Federico II", Via Cintia 4, 80126, Naples, Italy
| | - Valeria La Parola
- Istituto per lo Studio dei Materiali Nanostrutturati (ISMN)-CNR, Via Ugo La Malfa 153, 90146, Palermo, Italy
| | - Alessandra Napolitano
- Department of Chemical Sciences, University of Naples "Federico II", Via Cintia 4, 80126, Naples, Italy
| | - Francesco Giacalone
- Department of Biological, Chemical and Pharmaceutical Sciences and Technologies (STEBICEF) and INSTM UdR - Palermo, University of Palermo, Viale delle Scienze, Ed. 17, 90128, Palermo, Italy
| | - Michelangelo Gruttadauria
- Department of Biological, Chemical and Pharmaceutical Sciences and Technologies (STEBICEF) and INSTM UdR - Palermo, University of Palermo, Viale delle Scienze, Ed. 17, 90128, Palermo, Italy
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Tyurin VS, Shkirdova AO, Koifman OI, Zamilatskov IA. Meso-Formyl, Vinyl, and Ethynyl Porphyrins-Multipotent Synthons for Obtaining a Diverse Array of Functional Derivatives. Molecules 2023; 28:5782. [PMID: 37570752 PMCID: PMC10421532 DOI: 10.3390/molecules28155782] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/09/2023] [Revised: 07/23/2023] [Accepted: 07/25/2023] [Indexed: 08/13/2023] Open
Abstract
This review presents a strategy for obtaining various functional derivatives of tetrapyrrole compounds based on transformations of unsaturated carbon-oxygen and carbon-carbon bonds of the substituents at the meso position (meso-formyl, vinyl, and ethynyl porphyrins). First, synthetic approaches to the preparation of these precursors are described. Then diverse pathways for the transformations of the multipotent synthons are discussed, revealing a variety of products of such reactions. The structures, electronic, and optical properties of the compounds obtained by the methods under consideration are analyzed. In addition, there is an overview of the applications of the products obtained. Biomedical use of the compounds is among the most important. Finally, the advantages of using the reviewed synthetic strategy to obtain dyes with targeted properties are highlighted.
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Affiliation(s)
- Vladimir S. Tyurin
- Frumkin Institute of Physical Chemistry and Electrochemistry, Russian Academy of Sciences, 119071 Moscow, Russia
| | - Alena O. Shkirdova
- Frumkin Institute of Physical Chemistry and Electrochemistry, Russian Academy of Sciences, 119071 Moscow, Russia
| | - Oscar I. Koifman
- Department of Chemistry and Technology of Macromolecular Compounds, Ivanovo State University of Chemistry and Technology, 153000 Ivanovo, Russia;
| | - Ilya A. Zamilatskov
- Frumkin Institute of Physical Chemistry and Electrochemistry, Russian Academy of Sciences, 119071 Moscow, Russia
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6
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Cai J, Sun B, Yu S, Zhang H, Zhang W. Heck Macrocyclization in Forging Non-Natural Large Rings including Macrocyclic Drugs. Int J Mol Sci 2023; 24:ijms24098252. [PMID: 37175956 PMCID: PMC10179193 DOI: 10.3390/ijms24098252] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/09/2023] [Revised: 05/01/2023] [Accepted: 05/03/2023] [Indexed: 05/15/2023] Open
Abstract
The intramolecular Heck reaction is a well-established strategy for natural product total synthesis. When constructing large rings, this reaction is also referred to as Heck macrocyclization, which has proved a viable avenue to access diverse naturally occurring macrocycles. Less noticed but likewise valuable, it has created novel macrocycles of non-natural origin that neither serve as nor derive from natural products. This review presents a systematic account of the title reaction in forging this non-natural subset of large rings, thereby addressing a topic rarely covered in the literature. Walking through two complementary sections, namely (1) drug discovery research and (2) synthetic methodology development, it demonstrates that beyond the well-known domain of natural product synthesis, Heck macrocyclization also plays a remarkable role in forming synthetic macrocycles, in particular macrocyclic drugs.
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Affiliation(s)
- Jiayou Cai
- The State Key Laboratory of Medicinal Chemical Biology, College of Pharmacy, Tianjin Key Laboratory of Molecular Drug Research, Nankai University, Tianjin 300071, China
| | - Bin Sun
- The State Key Laboratory of Medicinal Chemical Biology, College of Pharmacy, Tianjin Key Laboratory of Molecular Drug Research, Nankai University, Tianjin 300071, China
| | - Siqi Yu
- The State Key Laboratory of Medicinal Chemical Biology, College of Pharmacy, Tianjin Key Laboratory of Molecular Drug Research, Nankai University, Tianjin 300071, China
| | - Han Zhang
- The State Key Laboratory of Medicinal Chemical Biology, College of Pharmacy, Tianjin Key Laboratory of Molecular Drug Research, Nankai University, Tianjin 300071, China
| | - Weicheng Zhang
- The State Key Laboratory of Medicinal Chemical Biology, College of Pharmacy, Tianjin Key Laboratory of Molecular Drug Research, Nankai University, Tianjin 300071, China
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7
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Su S, Lin C, Zhai H. Divergent Total Syntheses of (-)-Daphnezomines A and B and (+)-Dapholdhamine B. Angew Chem Int Ed Engl 2023; 62:e202303402. [PMID: 36995908 DOI: 10.1002/anie.202303402] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/07/2023] [Revised: 03/30/2023] [Accepted: 03/30/2023] [Indexed: 03/31/2023]
Abstract
The daphnezomine A-type subfamily of Daphniphyllum alkaloids structurally features a unique aza-adamantane core skeleton and anticipates efficient strategies for completing their syntheses to thoroughly investigate their biological activities. Herein, divergent total syntheses of (-)-daphnezomines A and B and (+)-dapholdhamine B have been accomplished in 16~20 steps from a known epoxide via rapid construction of a common core intermediate. The present work features a Ti-mediated radical cyclization to establish the azabicyclo[3.3.1]nonane ring system, an intramolecular Heck reaction to install the bridgehead all-carbon quaternary stereocenter, a tandem deprotection/reduction/keto amine-carbinolamine tautomerization to furnish the aza-adamantane backbone, and an NIS-promoted 6-endo-trig aminocyclization to assemble the (+)-dapholdhamine B backbone.
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Affiliation(s)
- Shaobin Su
- Peking University Shenzhen Graduate School, School of Chemical Biology and Biotechnology, CHINA
| | - Chengcheng Lin
- Peking University Shenzhen Graduate School, School of Chemical Biology and Biotechnology, CHINA
| | - Hongbin Zhai
- Peking University, Key Laboratory of Chemical Genomics, 518055, Shenzhen, CHINA
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8
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Shi G, Dong Z. Palladium Supported on Porous Organic Polymer as Heterogeneous and Recyclable Catalyst for Cross Coupling Reaction. Molecules 2022; 27:molecules27154777. [PMID: 35897956 PMCID: PMC9332046 DOI: 10.3390/molecules27154777] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/06/2022] [Revised: 07/22/2022] [Accepted: 07/25/2022] [Indexed: 11/24/2022]
Abstract
Palladium immobilized on an amide and ether functionalized porous organic polymer (Pd@AEPOP) is reported to be an effective heterogeneous catalyst for the Heck cross-coupling reaction of aryl iodides with styrene for the synthesis of diphenylethene derivatives. Excellent yields can be obtained using a 0.8 mol% Pd catalyst loading under the optimized reaction condition. The heterogeneous Pd@AEPOP catalyst can also be applied on the Suzuki reaction and the reduction of nitroarene.
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Affiliation(s)
- Guanying Shi
- Institute of Agricultural Products Processing, Henan Academy of Agricultural Sciences, Zhengzhou 450002, China;
| | - Zhenhua Dong
- College of Chemistry and Chemical Engineering, Henan University of Technology, Lianhua Street 100, Zhengzhou 450001, China
- Correspondence:
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9
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Zhang Z, Kvasovs N, Dubrovina A, Gevorgyan V. Visible Light Induced Brønsted Acid Assisted Pd-Catalyzed Alkyl Heck Reaction of Diazo Compounds and N-Tosylhydrazones. Angew Chem Int Ed Engl 2022; 61:e202110924. [PMID: 34706124 PMCID: PMC8712420 DOI: 10.1002/anie.202110924] [Citation(s) in RCA: 19] [Impact Index Per Article: 9.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/13/2021] [Revised: 10/04/2021] [Indexed: 01/05/2023]
Abstract
A mild visible light-induced palladium-catalyzed alkyl Heck reaction of diazo compounds and N-tosylhydrazones is reported. A broad range of vinyl arenes and heteroarenes with high functional group tolerance, as well as a range of different diazo compounds, can efficiently undergo this transformation. This method features Brønsted acid-assisted generation of hybrid palladium C(sp3 )-centered radical intermediate, which allowed for new selective C-H functionalization protocol.
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Affiliation(s)
- Ziyan Zhang
- Department of Chemistry and Biochemistry, University of Texas at Dallas, 800 West Campbell Rd, Richardson, TX, 75080, USA
| | - Nikita Kvasovs
- Department of Chemistry and Biochemistry, University of Texas at Dallas, 800 West Campbell Rd, Richardson, TX, 75080, USA
| | - Anastasiia Dubrovina
- Department of Chemistry and Biochemistry, University of Texas at Dallas, 800 West Campbell Rd, Richardson, TX, 75080, USA
| | - Vladimir Gevorgyan
- Department of Chemistry and Biochemistry, University of Texas at Dallas, 800 West Campbell Rd, Richardson, TX, 75080, USA
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10
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Domzalska-Pieczykolan A, Funes-Ardoiz I, Furman B, Bolm C. Selective Approaches to α- and β-Arylated Vinyl Ethers. Angew Chem Int Ed Engl 2022; 61:e202109801. [PMID: 34758166 PMCID: PMC9299197 DOI: 10.1002/anie.202109801] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/22/2021] [Revised: 11/09/2021] [Indexed: 11/09/2022]
Abstract
We developed simple and efficient protocols for palladium‐catalyzed regioselective α‐ and β‐arylations of structurally diverse vinyl ethers. Both catalytic methods proceed under relatively mild reactions conditions applying to a broad substrate range including more complex compounds providing arylated glucal or isochromene. Lacking the common requirement of a large reagent excess, the transformations are highly economic and limiting the waste production. Results from computational studies (DFT) provided insight into the key factors determining the pronounced regioselectivities of the investigated reactions.
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Affiliation(s)
| | - Ignacio Funes-Ardoiz
- Departamento de Química, Centro de Investigación en Síntesis Química (CISQ), University of La Rioja, Madre de Dios 53, 26006, Logroño, Spain
| | - Bartłomiej Furman
- Institute of Organic Chemistry, Polish Academy of Sciences, Kasprzaka 44/52, 01-224, Warsaw, Poland
| | - Carsten Bolm
- Institut für Organische Chemie, RWTH Aachen University, Landoltweg 1, 52074, Aachen, Germany
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11
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Wang X, Lu X. Palladium-Promoted On-DNA Heck Reactions. Methods Mol Biol 2022; 2541:55-61. [PMID: 36083544 DOI: 10.1007/978-1-0716-2545-3_9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
Abstract
Optimal conditions of palladium-catalyzed on-DNA Heck reactions were developed between DNA-conjugated acryl amide/styrene/aryl iodide and broad substrate scopes (aromatic borates/halides/styrene), which can introduce the diversity of building blocks to DNA-encoded libraries.
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Affiliation(s)
- Xuan Wang
- State Key Laboratory of Drug Research, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, Shanghai, China.
| | - Xiaojie Lu
- State Key Laboratory of Drug Research, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, Shanghai, China
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12
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Abstract
Polyalkyl furans are widespread in nature, often performing important biological roles. Despite a plethora of methods for the synthesis of tetrasubstituted furans, the construction of tetraalkyl furans remains non-trivial. The prevalence of alkyl groups in bioactive furan natural products, combined with the desirable bioactivities of tetraalkyl furans, calls for a general synthetic protocol for polyalkyl furans. This paper describes a Michael-Heck approach, using sequential phosphine-palladium catalysis, for the preparation of various polyalkyl furans from readily available precursors. The versatility of this method is illustrated by the total syntheses of nine distinct polyalkylated furan natural products belonging to different classes, namely the furanoterpenes rosefuran, sesquirosefuran, and mikanifuran; the marine natural products plakorsins A, B, and D and plakorsin D methyl ester; and the furan fatty acids 3D5 and hydromumiamicin.
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Affiliation(s)
- Violet Yijang Chen
- Department of Chemistry and Biochemistry, University of California, Los Angeles, Los Angeles, CA 90095-1659 (USA)
| | - Ohyun Kwon
- Department of Chemistry and Biochemistry, University of California, Los Angeles, Los Angeles, CA 90095-1659 (USA)
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13
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Ayogu JI, Onoabedje EA. Prospects and Applications of Palladium Nanoparticles in the Cross-coupling of (hetero)aryl Halides and Related Analogues. ChemistryOpen 2021; 10:430-450. [PMID: 33590728 PMCID: PMC8015734 DOI: 10.1002/open.202000309] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/14/2020] [Indexed: 12/14/2022] Open
Abstract
Discovering efficient methods for the formation of carbon-carbon bonds is a central ongoing theme in organic synthesis. Cross-coupling reactions catalysed by metal nanoparticles are attractive alternatives to the traditional use of metal counterparts due to the catalytic tunability, selectivity, recyclability and reusability of the nanoparticles. The ongoing search for sustainable processes demands that reusable and environmentally benign catalysts are used. While the advantages of nanoparticles catalysts over bulk catalysts cannot be overemphasised, the problem of sintering, agglomeration and leaching are drawbacks to their full industrial applications. Hence, efforts are being made towards advancing the efficiency of the catalytic nanoparticle systems over the years. This review presents the progress, the challenges and the prospects of palladium nanoparticle with focus on Heck, Suzuki, Hiyama and Sonogashira cross-coupling reactions involving (hetero) aryl halides and the analogues.
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Affiliation(s)
- Jude I. Ayogu
- Department of Chemistry, School of Physical and Chemical ScienceUniversity of CanterburyChristchurch8040New Zealand
- Department of Pure and Industrial ChemistryUniversity of NigeriaNsukka410001Nigeria
| | - Efeturi A. Onoabedje
- Department of Pure and Industrial ChemistryUniversity of NigeriaNsukka410001Nigeria
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14
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Abstract
A visible light-induced palladium-catalyzed oxidative C-H alkylation of oximes has been developed. This mild protocol allows for an efficient atom economical C-C bond construction of alkyl-substituted oximes. A broad range of primary, secondary, and tertiary alkyl bromides and iodides, as well as a range of different formaldoximes, can efficiently undergo this transformation. The method features visible light-induced generation of nucleophilic hybrid alkyl Pd radical intermediates, which upon radical addition at the imine moiety and a subsequent β-hydrogen elimination deliver substituted imines.
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Affiliation(s)
- Nikita Kvasovs
- Department of Chemistry and Biochemistry, The University of Texas at Dallas, Richardson, Texas 75080-3021, United States
| | - Valeriia Iziumchenko
- Department of Chemistry and Biochemistry, The University of Texas at Dallas, Richardson, Texas 75080-3021, United States
| | - Vitalii Palchykov
- Department of Chemistry and Biochemistry, The University of Texas at Dallas, Richardson, Texas 75080-3021, United States
| | - Vladimir Gevorgyan
- Department of Chemistry and Biochemistry, The University of Texas at Dallas, Richardson, Texas 75080-3021, United States
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15
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Dziemidkiewicz A, Maciejewska M. Manganese and Nickel Acetylacetonates as Curatives for Chloroprene Rubber Based on Heck's Reaction. Materials (Basel) 2021; 14:807. [PMID: 33567669 DOI: 10.3390/ma14040807] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/17/2020] [Revised: 01/20/2021] [Accepted: 02/03/2021] [Indexed: 01/19/2023]
Abstract
The commonly used curing system for chloroprene rubber (CR) is a combination of two metal oxides, such as magnesium oxide (MgO) and zinc oxide (ZnO). Application of MgO and ZnO enables to obtain a good balance between processability of rubber compounds and mechanical properties of the vulcanizates. Despite high activity in crosslinking reactions, ZnO is classified as ecotoxic to aquatic organisms, thus environmental legislation requires its quantity in technology to be limited. In our studies more environmentally friendly curing systems were applied, which enabled eliminating ZnO from CR compounds. These curing systems consisted of manganese acetylacetonate (Mn(acac)) or nickel acetylacetonate (Ni(acac)) and triethanolamine (TEOA) used as a base necessary to perform Heck’s reaction. Both metal acetylacetonates exhibited high activity in crosslinking reactions, which was confirmed by a great torque increment during rheometric measurements and high degree of elastomer crosslinking. The type of metal acetylacetonate and the amount of TEOA seemed to have less influence on the efficiency of the curing system than the filler used. Rubber compounds filled with carbon black (CB) were characterized by definitely shorter optimal vulcanization times and higher degree of crosslinking compared to CR composites filled with nanosized SiO2. Moreover, application of the proposed curing systems allowed to obtain CR vulcanizates with mechanical properties comparable with the benchmarks cured with metal oxides.
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16
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Bonfield HE, Valette D, Lindsay DM, Reid M. Stereoselective Remote Functionalization via Palladium-Catalyzed Redox-Relay Heck Methodologies. Chemistry 2021; 27:158-174. [PMID: 32744766 PMCID: PMC7821197 DOI: 10.1002/chem.202002849] [Citation(s) in RCA: 17] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/12/2020] [Indexed: 11/29/2022]
Abstract
Exploration of novel, three-dimensional chemical space is of growing interest in the drug discovery community and with this comes the challenge for synthetic chemists to devise new stereoselective methods to introduce chirality in a rapid and efficient manner. This Minireview provides a timely summary of the development of palladium-catalyzed asymmetric redox-relay Heck-type processes. These reactions represent an important class of transformation for the selective introduction of remote stereocenters, and have risen to prominence over the past decade. Within this Minireview, the vast scope of these transformations will be showcased, alongside applications to pharmaceutically relevant chiral building blocks and drug substances. To complement this overview, a mechanistic summary and discussion of the current limitations of the transformation are presented, followed by an outlook on future areas of investigation.
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Affiliation(s)
- Holly E. Bonfield
- Chemical DevelopmentGlaxoSmithKlineGunnels Wood RoadStevenageHertfordshireSG1 2NYUK
- Department of Pure and Applied Chemistry WestCHEMUniversity of Strathclyde295 Cathedral StreetGlasgowScotlandG1 1XLUK
| | - Damien Valette
- Chemical DevelopmentGlaxoSmithKlineGunnels Wood RoadStevenageHertfordshireSG1 2NYUK
| | - David M. Lindsay
- Department of Pure and Applied Chemistry WestCHEMUniversity of Strathclyde295 Cathedral StreetGlasgowScotlandG1 1XLUK
| | - Marc Reid
- Department of Pure and Applied Chemistry WestCHEMUniversity of Strathclyde295 Cathedral StreetGlasgowScotlandG1 1XLUK
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17
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Li J, Song Y, Wang Y, Zhang H. Ultrafine PdCu Nanoclusters by Ultrasonic-Assisted Reduction on the LDHs/rGO Hybrid with Significantly Enhanced Heck Reactivity. ACS Appl Mater Interfaces 2020; 12:50365-50376. [PMID: 33108171 DOI: 10.1021/acsami.0c09106] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
A series of hierarchical nanosheet array-like Co-Al layered double hydroxides (LDHs)/reduced graphene oxide (rGO) hybrid supported ultrafine PdCu nanocluster (NC) catalysts m-PdCux/LDHs/rGO (x: Cu/Pd molar ratio of 1.5, 3.0, and 5.5; m: Pd loadings of ∼0.80, 0.40, 0.11, and 0.01 wt %) were assembled via an ultrasonic-assisted NaBH4 reduction-sol immobilization strategy. The as-obtained catalysts display ultrafine PdCu alloy NCs with sizes of ∼0.9-1.8 nm finely tuned by both Cu/Pd ratios and Pd loadings and mainly distributed on the edge sites of LDH nanosheets and part of LDHs-rGO junctions upon the unique hierarchical nanosheet array-like structure. Three catalysts 0.85-PdCu1.5/LDHs/rGO, 0.83-PdCu3.0/LDHs/rGO, and 0.80-PdCu5.5/LDHs/rGO exhibit excellent Heck reactivity for iodobenzene with styrene, of which the 0.83-PdCu3.0/LDHs/rGO shows the highest activity, much higher than Pd/LDHs/rGO and single LDHs or GO supported PdCu3.0 catalysts, attributed to the ultrafine PdCu3.0 NCs, the largest electron density of the Pd0 center, and the strongest PdCu3.0 NCs-LDHs-rGO three-phase synergistic effect. The lowest Pd-loading sample 0.01-PdCu3.0/LDHs/rGO shows an unprecedented turnover frequency of 210 000 h-1 (Pd dosage: 2 × 10-5 mol %) with the highest value so far, excellent adaptability for substrates, and reusability. The present work provides a versatile method for designing hierarchically structured ultrafine Pd-M alloy NC catalysts for varied catalysis processes.
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Affiliation(s)
- Jin Li
- State Key Laboratory of Chemical Resource Engineering, Beijing University of Chemical Technology, P.O. Box 98, Beijing 100029, China
| | - Ying Song
- State Key Laboratory of Chemical Resource Engineering, Beijing University of Chemical Technology, P.O. Box 98, Beijing 100029, China
| | - Yanna Wang
- State Key Laboratory of Chemical Resource Engineering, Beijing University of Chemical Technology, P.O. Box 98, Beijing 100029, China
| | - Hui Zhang
- State Key Laboratory of Chemical Resource Engineering, Beijing University of Chemical Technology, P.O. Box 98, Beijing 100029, China
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18
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Higashijima T, Kishikawa N, Kuroda N. Long-wavelength Fluorogenic Derivatization of Aryl Halides Based on the Formation of Stilbene by Heck Reaction with Vinylbenzenes. ANAL SCI 2020; 36:997-1001. [PMID: 32173676 DOI: 10.2116/analsci.20p031] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/30/2020] [Accepted: 03/03/2020] [Indexed: 08/09/2023]
Abstract
The long-wavelength fluorogenic derivatization method for aryl halides was developed based on stilbene formation by the Heck coupling reaction between aryl halides and vinylbenzenes in the presence of palladium(II) acetate as a catalyst. Fluorescent maximum wavelengths of the derivative obtained by the proposed reaction were 365 - 450 nm, which were 50 - 100 nm longer than those of the biphenyl derivatives formed with our previously developed fluorogenic derivatization method. Also, by the investigation using vinylbenzenes containing electron-donating or -withdrawing functional groups, it was found that an internal charge transfer system could contribute to extend the emission wavelength of the derivative. Furthermore, the proposed reaction was applied to develop a pre-column derivatization HPLC with fluorescence detection method for aryl bromides using 4-vinylanisole. p-Substituted aryl bromide derivatives (i.e., p-bromobenzonitrile, p-bromoanisole, bromobenzene, p-bromobenzoic acid ethyl ester, p-bromotoluene) were successfully detected within 40 min with the detection limit of 0.007 - 0.264 μM. Despite the short reaction time of 10 min, the reaction yields for p-bromoanisole and bromobenzene were good at 101 and 87%, respectively.
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Affiliation(s)
- Takumi Higashijima
- Graduate School of Biomedical Sciences, Course of Pharmaceutical Sciences, Nagasaki University, 1-14 Bunkyo-machi, Nagasaki, 852-8521, Japan
| | - Naoya Kishikawa
- Graduate School of Biomedical Sciences, Course of Pharmaceutical Sciences, Nagasaki University, 1-14 Bunkyo-machi, Nagasaki, 852-8521, Japan
| | - Naotaka Kuroda
- Graduate School of Biomedical Sciences, Course of Pharmaceutical Sciences, Nagasaki University, 1-14 Bunkyo-machi, Nagasaki, 852-8521, Japan.
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19
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Neumann H, Sergeev AG, Spannenberg A, Beller M. Efficient Palladium-Catalyzed Synthesis of 2-Aryl Propionic Acids. Molecules 2020; 25:molecules25153421. [PMID: 32731527 PMCID: PMC7435766 DOI: 10.3390/molecules25153421] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/02/2020] [Revised: 07/23/2020] [Accepted: 07/24/2020] [Indexed: 12/05/2022] Open
Abstract
A flexible two-step, one-pot procedure was developed to synthesize 2-aryl propionic acids including the anti-inflammatory drugs naproxen and flurbiprofen. Optimal results were obtained in the presence of the novel ligand neoisopinocampheyldiphenylphosphine (NISPCPP) (9) which enabled the efficient sequential palladium-catalyzed Heck coupling of aryl bromides with ethylene and hydroxycarbonylation of the resulting styrenes to 2-aryl propionic acids. This cascade transformation leads with high regioselectivity to the desired products in good yields and avoids the need for additional purification steps.
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Affiliation(s)
- Helfried Neumann
- Leibniz-Institut für Katalyse e.V., Albert-Einstein-Straße 29a, 18059 Rostock, Germany; (H.N.); (A.S.)
| | - Alexey G. Sergeev
- Department of Chemistry, University of Liverpool, Liverpool L69 7ZD, UK;
| | - Anke Spannenberg
- Leibniz-Institut für Katalyse e.V., Albert-Einstein-Straße 29a, 18059 Rostock, Germany; (H.N.); (A.S.)
| | - Matthias Beller
- Leibniz-Institut für Katalyse e.V., Albert-Einstein-Straße 29a, 18059 Rostock, Germany; (H.N.); (A.S.)
- Correspondence:
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20
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Ma X, Meng S, Zhang X, Zhang Q, Yan S, Zhang Y, Zhang W. Synthesis of pyrrolidinedione-fused hexahydropyrrolo[2,1- a]isoquinolines via three-component [3 + 2] cycloaddition followed by one-pot N-allylation and intramolecular Heck reactions. Beilstein J Org Chem 2020; 16:1225-1233. [PMID: 32550934 PMCID: PMC7277624 DOI: 10.3762/bjoc.16.106] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/15/2020] [Accepted: 05/26/2020] [Indexed: 12/13/2022] Open
Abstract
Two kinds of [3 + 2] cycloaddition intermediates generated from the three-component reactions of 2-bromobenzaldehydes and maleimides with amino esters or amino acids were used for a one-pot N-allylation and intramolecular Heck reactions to form pyrrolidinedione-fused hexahydropyrrolo[2,1-a]isoquinolines. The multicomponent reaction was combined with one-pot reactions to make a synthetic method with good pot, atom and step economy. MeCN was used as a preferable green solvent for the reactions.
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Affiliation(s)
- Xiaoming Ma
- School of Pharmaceutical Engineering and Life Science, Changzhou University, Changzhou 213164, China
| | - Suzhi Meng
- School of Pharmaceutical Engineering and Life Science, Changzhou University, Changzhou 213164, China
| | - Xiaofeng Zhang
- Center for Green Chemistry and Department of Chemistry, University of Massachusetts Boston, 100 Morrissey Boulevard, Boston, MA 02125, USA
- Department of Cancer Biology, Dana-Farber Cancer Institute, Department of Medicine, Harvard Medical School, Boston, MA 02215, USA
| | - Qiang Zhang
- School of Chemistry, Biology and Materials Engineering, Suzhou University of Science and Technology, Suzhou 215009, China
| | - Shenghu Yan
- School of Pharmaceutical Engineering and Life Science, Changzhou University, Changzhou 213164, China
| | - Yue Zhang
- School of Pharmaceutical Engineering and Life Science, Changzhou University, Changzhou 213164, China
| | - Wei Zhang
- Center for Green Chemistry and Department of Chemistry, University of Massachusetts Boston, 100 Morrissey Boulevard, Boston, MA 02125, USA
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21
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Kimbrough JR, Jana S, Kim K, Allweil A, Oates JA, Milne GL, Sulikowski GA. Synthesis of tetranor-PGE 1: a urinary metabolite of prostaglandins E 1 and E 2. Tetrahedron Lett 2020; 61:151922. [PMID: 32523235 PMCID: PMC7286543 DOI: 10.1016/j.tetlet.2020.151922] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Abstract
Prostaglandin E2 is produced in response to inflammation, often associated with human disease. As prostaglandins are rapidly metabolized, quantification of end urinary metabolites depend on chemical synthesis of isotopically labeled standards to support metabolite quantification. A concise synthesis of tetranor-PGE1 is described including a late stage incorporation of an isotopically labeled side-chain.
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Affiliation(s)
| | - Somnath Jana
- Institute of Chemical Biology, Vanderbilt University School of Medicine, Nashville, TN 37232, U.S.A
| | - Kwangho Kim
- Department of Chemistry, Vanderbilt University, Nashville, TN 37235, U.S.A
- Institute of Chemical Biology, Vanderbilt University School of Medicine, Nashville, TN 37232, U.S.A
| | - Alexander Allweil
- Department of Chemistry, Vanderbilt University, Nashville, TN 37235, U.S.A
| | - John A. Oates
- Department of Pharmacology, Vanderbilt University School of Medicine, Nashville, TN 37232, U.S.A
| | - Ginger L. Milne
- Institute of Chemical Biology, Vanderbilt University School of Medicine, Nashville, TN 37232, U.S.A
- Department of Pharmacology, Vanderbilt University School of Medicine, Nashville, TN 37232, U.S.A
| | - Gary A. Sulikowski
- Department of Chemistry, Vanderbilt University, Nashville, TN 37235, U.S.A
- Institute of Chemical Biology, Vanderbilt University School of Medicine, Nashville, TN 37232, U.S.A
- Department of Pharmacology, Vanderbilt University School of Medicine, Nashville, TN 37232, U.S.A
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22
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Mohd Izham NZ, Yusoff HM, Ul Haq Bhat I, Endo T, Fukumura H, Kwon E, Yoshida SI, Asari A, Osman UM, Mohd Yusof MS. Data on synthesis and characterization of new p-nitro stilbene Schiff bases derivatives as an electrochemical DNA potential spacer. Data Brief 2020; 30:105568. [PMID: 32368595 PMCID: PMC7184124 DOI: 10.1016/j.dib.2020.105568] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/30/2020] [Revised: 04/05/2020] [Accepted: 04/06/2020] [Indexed: 11/06/2022] Open
Abstract
The structural investigation of synthesized compounds can be carried out by various spectroscopic techniques. It is an important prospect in order to elucidate the structure of the desired products before being further utilized. The preparation of new p-nitro stilbene Schiff base derivatives as an electrochemical DNA potential spacer was synthesized using (E)-4-(4-nitrostyryl)aniline from Heck reaction with aldehydes in ethanolic solution. The data presented here in this article contains FTIR, UV-Vis and 1H and 13C NMR of (E)-4-(4-nitrostyryl)aniline and nitrostyryl aniline derivatives.
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Affiliation(s)
- Nur Zafirah Mohd Izham
- Faculty of Science and Marine Environment, Universiti Malaysia Terengganu, 21030 Kuala Nerus, Terengganu, Malaysia
| | - Hanis Mohd Yusoff
- Faculty of Science and Marine Environment, Universiti Malaysia Terengganu, 21030 Kuala Nerus, Terengganu, Malaysia.,Advanced Nano Materials (ANoMa) Research Group, Faculty of Science and Marine Environment, Universiti Malaysia Terengganu, 21030 Kuala Nerus, Terengganu, Malaysia
| | - Irshad Ul Haq Bhat
- Faculty of Science and Marine Environment, Universiti Malaysia Terengganu, 21030 Kuala Nerus, Terengganu, Malaysia.,Advanced Nano Materials (ANoMa) Research Group, Faculty of Science and Marine Environment, Universiti Malaysia Terengganu, 21030 Kuala Nerus, Terengganu, Malaysia
| | - Tomoaki Endo
- Sendai National College of Technology, 48 Nodayama, Madeshima-Shiote, Natori-shi, Miyagi 981-1239, Japan
| | - Hiroshi Fukumura
- Sendai National College of Technology, 48 Nodayama, Madeshima-Shiote, Natori-shi, Miyagi 981-1239, Japan.,Graduate School of Science, Tohoku University, Aramaki Aoba, Aoba-ku, Sendai 980-8578, Miyagi, Japan
| | - Eunsang Kwon
- Research and Analytical Center for Giant Molecules, Graduate School of Science, Tohoku University, Aramaki Aoba, Aoba-ku, Sendai 980-8578, Miyagi, Japan
| | - Shin-Ichiro Yoshida
- Research and Analytical Center for Giant Molecules, Graduate School of Science, Tohoku University, Aramaki Aoba, Aoba-ku, Sendai 980-8578, Miyagi, Japan
| | - Asnuzilawati Asari
- Faculty of Science and Marine Environment, Universiti Malaysia Terengganu, 21030 Kuala Nerus, Terengganu, Malaysia
| | - Uwaisulqarni M Osman
- Faculty of Science and Marine Environment, Universiti Malaysia Terengganu, 21030 Kuala Nerus, Terengganu, Malaysia.,Advanced Nano Materials (ANoMa) Research Group, Faculty of Science and Marine Environment, Universiti Malaysia Terengganu, 21030 Kuala Nerus, Terengganu, Malaysia
| | - Mohd Sukeri Mohd Yusof
- Faculty of Science and Marine Environment, Universiti Malaysia Terengganu, 21030 Kuala Nerus, Terengganu, Malaysia.,Advanced Nano Materials (ANoMa) Research Group, Faculty of Science and Marine Environment, Universiti Malaysia Terengganu, 21030 Kuala Nerus, Terengganu, Malaysia
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23
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Oxtoby LJ, Li ZQ, Tran VT, Erbay TG, Deng R, Liu P, Engle KM. A Transient-Directing-Group Strategy Enables Enantioselective Reductive Heck Hydroarylation of Alkenes. Angew Chem Int Ed Engl 2020; 59:8885-8890. [PMID: 32196876 DOI: 10.1002/anie.202001069] [Citation(s) in RCA: 37] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/20/2020] [Revised: 03/20/2020] [Indexed: 01/28/2023]
Abstract
Metal-coordinating directing groups have seen extensive use in the field of transition-metal-catalyzed alkene functionalization; however, their waste-generating installation and removal steps limit the efficiency and practicality of reactions that rely on their use. Inspired by developments in asymmetric organocatalysis, where reactions rely on reversible covalent interactions between an organic substrate and a chiral mediator, we have developed a transient-directing-group approach to reductive Heck hydroarylation of alkenyl benzaldehyde substrates that proceeds under mild conditions. Highly stereoselective migratory insertion is facilitated by in situ formation of an imine from catalytic amounts of a commercially available amino acid additive. Computational studies reveal an unusual mode of enantioinduction by the remote chiral center in the transient directing group.
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Affiliation(s)
- Lucas J Oxtoby
- Department of Chemistry, The Scripps Research Institute, 10550 North Torrey Pines Road, La Jolla, CA, 92037, USA
| | - Zi-Qi Li
- Department of Chemistry, The Scripps Research Institute, 10550 North Torrey Pines Road, La Jolla, CA, 92037, USA
| | - Van T Tran
- Department of Chemistry, The Scripps Research Institute, 10550 North Torrey Pines Road, La Jolla, CA, 92037, USA
| | - Tuğçe G Erbay
- Department of Chemistry, University of Pittsburgh, Pittsburgh, PA, 15260, USA
| | - Ruohan Deng
- Department of Chemistry, The Scripps Research Institute, 10550 North Torrey Pines Road, La Jolla, CA, 92037, USA
| | - Peng Liu
- Department of Chemistry, University of Pittsburgh, Pittsburgh, PA, 15260, USA
| | - Keary M Engle
- Department of Chemistry, The Scripps Research Institute, 10550 North Torrey Pines Road, La Jolla, CA, 92037, USA
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24
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Zhu D, Jiao Z, Chi YR, Gonçalves TP, Huang KW, Zhou JS. Asymmetric Three-Component Heck Arylation/Amination of Nonconjugated Cyclodienes. Angew Chem Int Ed Engl 2020; 59:5341-5345. [PMID: 31965664 DOI: 10.1002/anie.201915864] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/11/2019] [Revised: 01/21/2020] [Indexed: 12/11/2022]
Abstract
Substituted cyclohexylamines are becoming increasingly important in drug discovery. Asymmetric Heck insertion/amination of nonconjugated cyclodienes proceeds to give 5-aryl cyclohexenylamines with good enantioselectivity and exclusive trans configurations. Primary and secondary anilines, indoline, and benzylamines are suitable amines. The weakly donating diphosphite Kelliphite forms a deep unsymmetrical pocket, which is essential for stereoselective anti attack of amines.
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Affiliation(s)
- Daoyong Zhu
- Division of Chemistry and Biological Chemistry, School of Physical and Mathematical Sciences, Nanyang Technological University, 21 Nanyang Link, Singapore, 637371, Singapore
| | - Zhiwei Jiao
- Division of Chemistry and Biological Chemistry, School of Physical and Mathematical Sciences, Nanyang Technological University, 21 Nanyang Link, Singapore, 637371, Singapore
| | - Yonggui Robin Chi
- Division of Chemistry and Biological Chemistry, School of Physical and Mathematical Sciences, Nanyang Technological University, 21 Nanyang Link, Singapore, 637371, Singapore
| | - Théo P Gonçalves
- KAUST Catalysis Center and Division of Physical Science and Technology, Thuwal, 23955-6900, Saudi Arabia
| | - Kuo-Wei Huang
- KAUST Catalysis Center and Division of Physical Science and Technology, Thuwal, 23955-6900, Saudi Arabia
| | - Jianrong Steve Zhou
- State Key Laboratory of Chemical Oncogenomics, Key Laboratory of Chemical Genomics, School of Chemical Biology and Biotechnology, Peking University Shenzhen Graduate School, Room F312, 2199 Lishui Road, Nanshan District, Shenzhen, 518055, China
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25
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Ríos-Lombardía N, Rodríguez-Álvarez MJ, Morís F, Kourist R, Comino N, López-Gallego F, González-Sabín J, García-Álvarez J. DESign of Sustainable One-Pot Chemoenzymatic Organic Transformations in Deep Eutectic Solvents for the Synthesis of 1,2-Disubstituted Aromatic Olefins. Front Chem 2020; 8:139. [PMID: 32211377 PMCID: PMC7067824 DOI: 10.3389/fchem.2020.00139] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/03/2019] [Accepted: 02/14/2020] [Indexed: 12/20/2022] Open
Abstract
The self-assembly of styrene-type olefins into the corresponding stilbenes was conveniently performed in the Deep Eutectic Solvent (DES) mixture 1ChCl/2Gly under air and in the absence of hazardous organic co-solvents using a one-pot chemo-biocatalytic route. Here, an enzymatic decarboxylation of p-hydroxycinnamic acids sequentially followed by a ruthenium-catalyzed metathesis of olefins has been investigated in DES. Moreover, and to extend the design of chemoenzymatic processes in DESs, we also coupled the aforementioned enzymatic decarboxylation reaction to now concomitant Pd-catalyzed Heck-type C-C coupling to produce biaryl derivatives under environmentally friendly reaction conditions.
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Affiliation(s)
| | - María Jesús Rodríguez-Álvarez
- Laboratorio de Compuestos Organometálicos y Catálisis (Unidad Asociada al CSIC), Departamento de Química Orgánica e Inorgánica (IUQOEM), Centro de Innovación en Química Avanzada (ORFEO-CINQA), Universidad de Oviedo, Oviedo, Spain
| | - Francisco Morís
- EntreChem SL, Vivero Ciencias de la Salud, Santo Domingo de Guzmán, Oviedo, Spain
| | - Robert Kourist
- Institute of Chemistry, Organic & Bioorganic Chemistry, NAWI Graz, BioTechMed Graz, University of Graz, Graz, Austria
| | - Natalia Comino
- Heterogeneous Biocatalysis Laboratory, CIC biomaGUNE, Donostia-San Sebastian, Spain
| | | | | | - Joaquín García-Álvarez
- Laboratorio de Compuestos Organometálicos y Catálisis (Unidad Asociada al CSIC), Departamento de Química Orgánica e Inorgánica (IUQOEM), Centro de Innovación en Química Avanzada (ORFEO-CINQA), Universidad de Oviedo, Oviedo, Spain
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26
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Mousavifar L, Vergoten G, Charron G, Roy R. Comparative Study of Aryl O-, C-, and S-Mannopyranosides as Potential Adhesion Inhibitors toward Uropathogenic E. coli FimH. Molecules 2019; 24:E3566. [PMID: 31581627 PMCID: PMC6804135 DOI: 10.3390/molecules24193566] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/09/2019] [Revised: 09/27/2019] [Accepted: 10/01/2019] [Indexed: 11/17/2022] Open
Abstract
A set of three mannopyranoside possessing identical 1,1'-biphenyl glycosidic pharmacophore but different aglyconic atoms were synthesized using either a palladium-catalyzed Heck cross coupling reaction or a metathesis reaction between their corresponding allylic glycoside derivatives. Their X-ray structures, together with their calculated 3D structures, showed strong indicators to explain the observed relative binding abilities against E. coli FimH as measured by a improved surface plasmon resonance (SPR) method. Amongst the O-, C-, and S-linked analogs, the C-linked analog showed the best ability to become a lead candidate as antagonist against uropathogenic E. coli with a Kd of 11.45 nM.
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Affiliation(s)
- Leila Mousavifar
- Department of Chemistry, Université du Québec à Montréal, P.O. Box 8888, Succ. Centre-Ville, Montréal, Québec H3C 3P8, Canada.
- Glycovax Pharma Inc., 424 Guy, Suite 202, Montreal, Quebec H3J 1S6, Canada.
| | - Gérard Vergoten
- Unité de Glycobiologie Structurale et Fonctionnelle (UGSF), UMR8576 du CNRS, Université de Lille, F-59000 Lille, France.
| | - Guillaume Charron
- Department of Chemistry, Université du Québec à Montréal, P.O. Box 8888, Succ. Centre-Ville, Montréal, Québec H3C 3P8, Canada.
| | - René Roy
- Department of Chemistry, Université du Québec à Montréal, P.O. Box 8888, Succ. Centre-Ville, Montréal, Québec H3C 3P8, Canada.
- Glycovax Pharma Inc., 424 Guy, Suite 202, Montreal, Quebec H3J 1S6, Canada.
- INRS-Institut Armand-Frappier, Université du Québec, 531 boul. des Prairies, Laval, Québec H7V 1B7, Canada.
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27
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Abstract
The Mizoroki-Heck reaction is one of the most studied palladium-catalyzed cross-coupling reactions, representing a powerful method for forming C-C bonds between diverse substrates with broad functional group compatibility. However, the reductive variant has received considerably less attention. In this Review, we summarize distinct mechanistic aspects of the reductive Heck reaction, highlight recent contributions to the field, and discuss potential applications of the reductive Heck reaction in the pharmaceutical industry. With the potential to have a large impact in both academic and industrial settings, further development of the reductive Heck reaction is a promising area of future investigation.
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Affiliation(s)
- Lucas J. Oxtoby
- Department of Chemistry, The Scripps Research Institute, 10550 North Torrey Pines Road, La Jolla, California 92037, United States
| | - John A. Gurak
- Department of Chemistry, The Scripps Research Institute, 10550 North Torrey Pines Road, La Jolla, California 92037, United States
| | - Steven R. Wisniewski
- Chemical & Synthetic Development, Bristol-Myers Squibb, 1 Squibb Drive, New Brunswick, New Jersey 08903, United States
| | - Martin D. Eastgate
- Chemical & Synthetic Development, Bristol-Myers Squibb, 1 Squibb Drive, New Brunswick, New Jersey 08903, United States
| | - Keary M. Engle
- Department of Chemistry, The Scripps Research Institute, 10550 North Torrey Pines Road, La Jolla, California 92037, United States
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28
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Pubill‐Ulldemolins C, Sharma SV, Cartmell C, Zhao J, Cárdenas P, Goss RJM. Heck Diversification of Indole-Based Substrates under Aqueous Conditions: From Indoles to Unprotected Halo-tryptophans and Halo-tryptophans in Natural Product Derivatives. Chemistry 2019; 25:10866-10875. [PMID: 31125453 PMCID: PMC6772188 DOI: 10.1002/chem.201901327] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/21/2019] [Revised: 05/21/2019] [Indexed: 12/17/2022]
Abstract
The blending of synthetic chemistry with biosynthetic processes provides a powerful approach to synthesis. Biosynthetic halogenation and synthetic cross-coupling have great potential to be used together, for small molecule generation, access to natural product analogues and as a tool for chemical biology. However, to enable enhanced generality of this approach, further synthetic tools are needed. Though considerable research has been invested in the diversification of phenylalanine and tyrosine, functionalisation of tryptophans thorough cross-coupling has been largely neglected. Tryptophan is a key residue in many biologically active natural products and peptides; in proteins it is key to fluorescence and dominates protein folding. To this end, we have explored the Heck cross-coupling of halo-indoles and halo-tryptophans in water, showing broad reaction scope. We have demonstrated the ability to use this methodology in the functionalisation of a brominated antibiotic (bromo-pacidamycin), as well as a marine sponge metabolite, barettin.
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Affiliation(s)
- Cristina Pubill‐Ulldemolins
- Department of Chemistry and BSRCUniversity of St AndrewsSt AndrewsKY16 9STUK
- Present address: Department of ChemistrySchool of Life SciencesUniversity of SussexBrightonBN19QJUK
| | - Sunil V. Sharma
- Department of Chemistry and BSRCUniversity of St AndrewsSt AndrewsKY16 9STUK
| | | | - Jinlian Zhao
- Department of Chemistry and BSRCUniversity of St AndrewsSt AndrewsKY16 9STUK
| | - Paco Cárdenas
- Pharmacognosy, Department of Medicinal ChemistryUppsala UniversityUppsala75123Sweden
| | - Rebecca J. M. Goss
- Department of Chemistry and BSRCUniversity of St AndrewsSt AndrewsKY16 9STUK
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Girase TR, Kapdi AR. Novel Carbazole-Based N-Heterocyclic Carbene Ligands to Access Synthetically Relevant Stilbenes in Pd-Catalyzed Coupling Processes. Chem Asian J 2019; 14:2611-2619. [PMID: 31034762 DOI: 10.1002/asia.201900419] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/25/2019] [Revised: 04/27/2019] [Indexed: 12/21/2022]
Abstract
A series of new carbazole-based N-heterocyclic carbene (NHC) ligands have been synthesized in a simple and facile synthetic route and subsequently used in a Pd/carbazole-based NHC catalytic system, which was found to be effective in catalyzing Heck reactions to provide substituted stilbene derivatives in good yields. Several bioactive stilbenes, including pterostilbene, pinosylvin, trimethoxy resveratrol, and resveratrol, were synthesized in good yields, and a 10 mmol scale-up was also performed for trimethoxy resveratrol. The synthetic application was also extended by performing a double-tandem chemoselective Heck reaction followed by Miyaura borylation in a one-pot procedure to give single-step access to synthetically useful stilbenyl boronate esters. Similarly, a unique triple-tandem protocol of a chemoselective Heck reaction/Miyaura borylation/Suzuki-Miyaura coupling reaction sequence was performed for the one-pot modification of biologically relevant molecules.
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Affiliation(s)
- Tejpalsingh Ramsingh Girase
- Department of Chemistry, Institute of Chemical Technology, Nathalal Parekh Marg Road, Matunga, Mumbai, 400019, India
| | - Anant R Kapdi
- Department of Chemistry, Institute of Chemical Technology, Nathalal Parekh Marg Road, Matunga, Mumbai, 400019, India
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Abstract
>The combination of CoCl2 with bidentate phosphines is known to catalyze challenging cross-coupling and Heck-type reactions, but the mechanisms of these valuable transformations have not been established. Here, we use electrospray-ionization mass spectrometry to intercept the species formed in these reactions. Our results indicate that a sequence of transmetalation, reductive elimination, and redox disproportionation convert the cobalt(II) precatalyst into low-valent cobalt complexes. These species readily transfer single electrons to alkyl bromides, which thereupon dissociate into alkyl radicals and Br- . In cross-coupling reactions, the alkyl radicals add to the cobalt catalyst to form observable heteroleptic complexes, which release the coupling products through reductive eliminations. In the Heck-type reactions, the low abundance of newly formed ionic species renders the analysis more difficult. Nonetheless, our results also point to the occurrence of single-electron transfer processes and the involvement of radicals in these transformations.
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Affiliation(s)
- Friedrich Kreyenschmidt
- Institut für Organische und Biomolekulare Chemie, Universität Göttingen, Tammannstraße 2, 37077, Göttingen, Germany
| | - Selim E Meurer
- Institut für Organische und Biomolekulare Chemie, Universität Göttingen, Tammannstraße 2, 37077, Göttingen, Germany
| | - Konrad Koszinowski
- Institut für Organische und Biomolekulare Chemie, Universität Göttingen, Tammannstraße 2, 37077, Göttingen, Germany
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31
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Abstract
The Heck reaction is one of the most reliable and useful strategies for the construction of C-C bonds in organic synthesis. However, in contrast to the well-established aryl Heck reaction, the analogous reaction employing alkyl electrophiles is much less developed. Significant progress in this area was recently achieved by merging radical-mediated and transition-metal-catalyzed approaches. This review summarizes the advances in alkyl Heck-type reactions from its discovery early in the 1970s up until the end of 2018.
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Affiliation(s)
- Daria Kurandina
- Department of Chemistry, University of Illinois at Chicago, 845 West Taylor Street, Chicago, IL 60607-7061, USA
| | - Padon Chuentragool
- Department of Chemistry, University of Illinois at Chicago, 845 West Taylor Street, Chicago, IL 60607-7061, USA
| | - Vladimir Gevorgyan
- Department of Chemistry, University of Illinois at Chicago, 845 West Taylor Street, Chicago, IL 60607-7061, USA
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32
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Yuan Z, Feng Z, Zeng Y, Zhao X, Lin A, Yao H. Palladium-Catalyzed Asymmetric Intramolecular Reductive Heck Desymmetrization of Cyclopentenes: Access to Chiral Bicyclo[3.2.1]octanes. Angew Chem Int Ed Engl 2019; 58:2884-2888. [PMID: 30664333 DOI: 10.1002/anie.201900059] [Citation(s) in RCA: 41] [Impact Index Per Article: 8.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/02/2019] [Indexed: 01/07/2023]
Abstract
A palladium-catalyzed asymmetric reductive Heck reaction of unactivated aliphatic alkenes, with eliminable β-hydrogen atoms, has been realized for the first time. A series of optically active bicyclo[3.2.1]octanes bearing chiral quaternary and tertiary carbon stereocenters were obtained in good yields with excellent enantioselectivities, exhibiting good functional-group tolerance and scalability. Moreover, deuterated optically active bicyclo[3.2.1]octanes were also obtained in high efficiency.
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Affiliation(s)
- Zhenbo Yuan
- State Key Laboratory of Natural Medicines (SKLNM) and Jiangsu Key Laboratory of Bioactive Natural Product Research, Department of Medicinal Chemistry, China Pharmaceutical University, Nanjing, 210009, P. R. China
| | - Ziwen Feng
- State Key Laboratory of Natural Medicines (SKLNM) and Jiangsu Key Laboratory of Bioactive Natural Product Research, Department of Medicinal Chemistry, China Pharmaceutical University, Nanjing, 210009, P. R. China
| | - Yuye Zeng
- State Key Laboratory of Natural Medicines (SKLNM) and Jiangsu Key Laboratory of Bioactive Natural Product Research, Department of Medicinal Chemistry, China Pharmaceutical University, Nanjing, 210009, P. R. China
| | - Xiaobin Zhao
- State Key Laboratory of Natural Medicines (SKLNM) and Jiangsu Key Laboratory of Bioactive Natural Product Research, Department of Medicinal Chemistry, China Pharmaceutical University, Nanjing, 210009, P. R. China
| | - Aijun Lin
- State Key Laboratory of Natural Medicines (SKLNM) and Jiangsu Key Laboratory of Bioactive Natural Product Research, Department of Medicinal Chemistry, China Pharmaceutical University, Nanjing, 210009, P. R. China
| | - Hequan Yao
- State Key Laboratory of Natural Medicines (SKLNM) and Jiangsu Key Laboratory of Bioactive Natural Product Research, Department of Medicinal Chemistry, China Pharmaceutical University, Nanjing, 210009, P. R. China
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Jiang X, Zhang MM, Xiong W, Lu LQ, Xiao WJ. Deaminative (Carbonylative) Alkyl-Heck-type Reactions Enabled by Photocatalytic C-N Bond Activation. Angew Chem Int Ed Engl 2019; 58:2402-2406. [PMID: 30565825 DOI: 10.1002/anie.201813689] [Citation(s) in RCA: 124] [Impact Index Per Article: 24.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/01/2018] [Indexed: 12/26/2022]
Abstract
The palladium-catalyzed Heck reaction is a well-known, Nobel Prize winning transformation for producing alkenes. Unlike the alkenyl and aryl variants of the Heck reaction, the alkyl-Heck reaction is still underdeveloped owing to the competitive side reactions of alkyl-palladium species. Herein, we describe the development of a deaminative alkyl-Heck-type reaction that proceeds through C-N bond activation by visible-light photoredox catalysis. A variety of aliphatic primary amines were found to be efficient starting materials for this new process, affording the corresponding alkene products in good yields under mild reaction conditions. Moreover, this strategy was successfully applied to deaminative carbonylative alkyl-Heck-type reactions.
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Affiliation(s)
- Xuan Jiang
- Key Laboratory of Pesticide & Chemical Biology, Ministry of Education, College of Chemistry, Central China Normal University, 152 Luoyu Road, Wuhan, Hubei, 430079, China
| | - Mao-Mao Zhang
- Key Laboratory of Pesticide & Chemical Biology, Ministry of Education, College of Chemistry, Central China Normal University, 152 Luoyu Road, Wuhan, Hubei, 430079, China
| | - Wei Xiong
- Key Laboratory of Pesticide & Chemical Biology, Ministry of Education, College of Chemistry, Central China Normal University, 152 Luoyu Road, Wuhan, Hubei, 430079, China
| | - Liang-Qiu Lu
- Key Laboratory of Pesticide & Chemical Biology, Ministry of Education, College of Chemistry, Central China Normal University, 152 Luoyu Road, Wuhan, Hubei, 430079, China
| | - Wen-Jing Xiao
- Key Laboratory of Pesticide & Chemical Biology, Ministry of Education, College of Chemistry, Central China Normal University, 152 Luoyu Road, Wuhan, Hubei, 430079, China.,State Key Laboratory of Organometallic Chemistry, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, Shanghai, 200032, China
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Chuentragool P, Yadagiri D, Morita T, Sarkar S, Parasram M, Wang Y, Gevorgyan V. Aliphatic Radical Relay Heck Reaction at Unactivated C(sp 3 )-H Sites of Alcohols. Angew Chem Int Ed Engl 2019; 58:1794-1798. [PMID: 30462879 DOI: 10.1002/anie.201812398] [Citation(s) in RCA: 84] [Impact Index Per Article: 16.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/29/2018] [Revised: 11/20/2018] [Indexed: 12/17/2022]
Abstract
The Mizoroki-Heck reaction is one of the most efficient methods for alkenylation of aryl, vinyl, and alkyl halides. Given its innate nature, this protocol requires the employment of compounds possessing a halogen atom at the site of functionalization. However, the accessibility of organic molecules possessing a halogen atom at a particular site in aliphatic systems is extremely limited. Thus, a protocol that allows a Heck reaction to occur at a specific nonfunctionalized C(sp3 )-H site is desirable. Reported here is a radical relay Heck reaction which allows selective remote alkenylation of aliphatic alcohols at unactivated β-, γ-, and δ-C(sp3 )-H sites. The use of an easily installed/removed Si-based auxiliary enables selective I-atom/radical translocation events at remote C-H sites followed by the Heck reaction. Notably, the reaction proceeds smoothly under mild visible-light-mediated conditions at room temperature, producing highly modifiable and valuable alkenol products from readily available alcohols feedstocks.
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Affiliation(s)
- Padon Chuentragool
- Department of Chemistry, University of Illinois at Chicago, 845 W. Taylor St., Rm. 4500, Chicago, IL, 60607, USA
| | - Dongari Yadagiri
- Department of Chemistry, University of Illinois at Chicago, 845 W. Taylor St., Rm. 4500, Chicago, IL, 60607, USA
| | - Taiki Morita
- Department of Chemistry, University of Illinois at Chicago, 845 W. Taylor St., Rm. 4500, Chicago, IL, 60607, USA
| | - Sumon Sarkar
- Department of Chemistry, University of Illinois at Chicago, 845 W. Taylor St., Rm. 4500, Chicago, IL, 60607, USA
| | - Marvin Parasram
- Department of Chemistry, University of Illinois at Chicago, 845 W. Taylor St., Rm. 4500, Chicago, IL, 60607, USA
| | - Yang Wang
- Department of Chemistry, University of Illinois at Chicago, 845 W. Taylor St., Rm. 4500, Chicago, IL, 60607, USA
| | - Vladimir Gevorgyan
- Department of Chemistry, University of Illinois at Chicago, 845 W. Taylor St., Rm. 4500, Chicago, IL, 60607, USA
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35
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Race NJ, Yuan Q, Sigman MS. Enantioselective C2-Alkylation of Indoles through a Redox-Relay Heck Reaction of 2-Indole Triflates. Chemistry 2018; 25:512-515. [PMID: 30402891 DOI: 10.1002/chem.201805416] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/02/2018] [Indexed: 11/06/2022]
Abstract
A palladium-catalyzed enantioselective redox-relay Heck reaction of 2-indole triflates and disubstituted alkenes is reported. This process combines readily available indole triflates with a variety of alkenes to afford a range of indole derivatives bearing a stereocenter adjacent to C2. Enantioselectivity is achieved through use of a simple pyridine-oxazoline ligand. Tuning the electronics of the indole, through judicious choice of N-protecting group, is required to ensure selective β-hydride elimination away from the indole core. Utility of this method is highlighted in a modular formal synthesis of an S1P1 agonist precursor developed by Merck.
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Affiliation(s)
- Nicholas J Race
- Department of Chemistry, University of Utah, 315 S 1400 E, Salt Lake City, Utah, 84112, USA
| | - Qianjia Yuan
- Department of Chemistry, University of Utah, 315 S 1400 E, Salt Lake City, Utah, 84112, USA
| | - Matthew S Sigman
- Department of Chemistry, University of Utah, 315 S 1400 E, Salt Lake City, Utah, 84112, USA
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36
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Abstract
The hydroarylation of alkenes is an attractive approach to construct carbon-carbon (C-C) bonds from abundant and structurally diverse starting materials. Herein we report a palladiumcatalyzed reductive Heck hydroarylation of unactivated and heteroatom-substituted terminal alkenes with an array of (hetero)aryl iodides. The reaction is anti-Markovnikov selective and tolerates a wide variety of functional groups on both the alkene and (hetero)aryl coupling partners. Additionally, applications of this method to complex molecule diversifications were demonstrated. Deuteriumlabeling experiments are consistent with a mechanism in which the key alkylpalladium(II) intermediate is intercepted with formate and undergoes a decarboxylation/C-H reductive elimination cascade to afford the saturated product and turn over the cycle.
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Affiliation(s)
- John A Gurak
- Department of Chemistry, The Scripps Research Institute, 10550 N. Torrey Pines Rd., La Jolla, California 92037, United States
| | - Keary M Engle
- Department of Chemistry, The Scripps Research Institute, 10550 N. Torrey Pines Rd., La Jolla, California 92037, United States
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37
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Zhang S, Yu K, Guo Y, Mou R, Lu X, Guo D. Preparation and Reactivation of Heterogeneous Palladium Catalysts and Applications in Sonogashira, Suzuki, and Heck Reactions in Aqueous Media. ChemistryOpen 2018; 7:803-813. [PMID: 30338204 PMCID: PMC6182254 DOI: 10.1002/open.201800139] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/06/2018] [Indexed: 12/18/2022] Open
Abstract
A new type of heterogeneous palladium catalyst, PdMgAl-LDH, was facilely prepared by the immobilization of Pd2+ species in the layers of a Mg-Al layered double hydroxide (LDH) with co-precipitation, and then fully characterized by using powder XRD, thermogravimetric differential thermal analysis, TEM, energy-dispersive X-ray spectroscopy, and X-ray photoelectron spectroscopy techniques. These catalysts can efficiently catalyze copper-free Sonogashira, Suzuki and Heck coupling reactions of various aryl iodides, bromides, and chlorides in aqueous media under phosphine-ligand- and organic-base-free conditions. These catalysts feature easy recovery through simple filtration and could be reused at least six times without a marked loss in activity. Notably, they can be facilely reactivated by a combination of nitrolysis with co-precipitation. The basic LDH skeletons could effectively stabilize the Pd0 species created in situ and donate electron density to the Pd0 center to facilitate the oxidative addition of aryl halides, thus the PdMgAl-LDH catalysts are stable during catalysis.
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Affiliation(s)
- Sheng‐Yan Zhang
- College of Chemistry, Chemical Engineering and Materials ScienceCollaborative Innovation Center of Functionalized Probes for, Chemical Imaging in Universities of ShandongShandong Normal UniversityJinan250014China
| | - Kai Yu
- College of Chemistry, Chemical Engineering and Materials ScienceCollaborative Innovation Center of Functionalized Probes for, Chemical Imaging in Universities of ShandongShandong Normal UniversityJinan250014China
| | - Yu‐Shuang Guo
- College of Chemistry, Chemical Engineering and Materials ScienceCollaborative Innovation Center of Functionalized Probes for, Chemical Imaging in Universities of ShandongShandong Normal UniversityJinan250014China
| | - Rui‐Qi Mou
- College of Chemistry, Chemical Engineering and Materials ScienceCollaborative Innovation Center of Functionalized Probes for, Chemical Imaging in Universities of ShandongShandong Normal UniversityJinan250014China
| | - Xiao‐Fan Lu
- College of Chemistry, Chemical Engineering and Materials ScienceCollaborative Innovation Center of Functionalized Probes for, Chemical Imaging in Universities of ShandongShandong Normal UniversityJinan250014China
| | - Dian‐Shun Guo
- College of Chemistry, Chemical Engineering and Materials ScienceCollaborative Innovation Center of Functionalized Probes for, Chemical Imaging in Universities of ShandongShandong Normal UniversityJinan250014China
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38
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Lopez-Tejedor D, de Las Rivas B, Palomo JM. Ultra-Small Pd(0) Nanoparticles into a Designed Semisynthetic Lipase: An Efficient and Recyclable Heterogeneous Biohybrid Catalyst for the Heck Reaction under Mild Conditions. Molecules 2018; 23:molecules23092358. [PMID: 30223522 PMCID: PMC6225421 DOI: 10.3390/molecules23092358] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/27/2018] [Revised: 09/13/2018] [Accepted: 09/13/2018] [Indexed: 12/14/2022] Open
Abstract
A novel heterogeneous enzyme-palladium (Pd) (0) nanoparticles (PdNPs) bionanohybrid has been synthesized by an efficient, green, and straightforward methodology. A designed Geobacillus thermocatenulatus lipase (GTL) variant genetically and then chemically modified by the introduction of a tailor-made cysteine-containing complementary peptide- was used as the stabilizing and reducing agent for the in situ formation of ultra-small PdNPs nanoparticles embedded on the protein structure. This bionanohybrid was an excellent catalyst in the synthesis of trans-ethyl cinnamate by Heck reaction at 65 °C. It showed the best catalytic performance in dimethylformamide (DMF) containing 10–25% of water as a solvent but was also able to catalyze the reaction in pure DMF or with a higher amount of water as co-solvent. The recyclability and stability were excellent, maintaining more than 90% of catalytic activity after five cycles of use.
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Affiliation(s)
- David Lopez-Tejedor
- Department of Biocatalysis, Institute of Catalysis (CSIC), Marie Curie 2, Cantoblanco Campus UAM, 28049 Madrid, Spain.
| | - Blanca de Las Rivas
- Institute of Food Science, Technology and Nutrition (ICTAN-CSIC), José Antonio Novais 10, 28040 Madrid, Spain.
| | - Jose M Palomo
- Department of Biocatalysis, Institute of Catalysis (CSIC), Marie Curie 2, Cantoblanco Campus UAM, 28049 Madrid, Spain.
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Hirasawa S, Cho M, Brust TF, Roach JJ, Bohn LM, Shenvi RA. O6C-20-nor-salvinorin A is a stable and potent KOR agonist. Bioorg Med Chem Lett 2018; 28:2770-2772. [PMID: 29426768 PMCID: PMC6067998 DOI: 10.1016/j.bmcl.2018.01.055] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/01/2018] [Revised: 01/23/2018] [Accepted: 01/26/2018] [Indexed: 11/18/2022]
Abstract
Salvinorin A (SalA) is a potent and selective agonist of the kappa-opioid receptor (KOR), but its instability has frustrated medicinal chemistry efforts. Treatment of SalA with weak bases like DBU leads to C8 epimerization with loss of receptor affinity and signaling potency. Here we show that replacement of C20 with H and replacement of O6 with CH2 stabilizes the SalA scaffold relative to its C8 epimer, so much so that epimerization is completely supressed. This new compound, O6C-20-nor-SalA, retains high potency for agonism of KOR.
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Affiliation(s)
- Shun Hirasawa
- The Scripps Research Institute, Department of Chemistry, La Jolla, CA 92037, United States
| | - Min Cho
- The Scripps Research Institute, Department of Chemistry, La Jolla, CA 92037, United States
| | - Tarsis F Brust
- The Scripps Research Institute, Departments of Molecular Medicine and Neuroscience,Jupiter, FL 33458, United States
| | - Jeremy J Roach
- The Scripps Research Institute, Department of Chemistry, La Jolla, CA 92037, United States
| | - Laura M Bohn
- The Scripps Research Institute, Departments of Molecular Medicine and Neuroscience,Jupiter, FL 33458, United States
| | - Ryan A Shenvi
- The Scripps Research Institute, Department of Chemistry, La Jolla, CA 92037, United States.
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Yu J, Hong Z, Yang X, Jiang Y, Jiang Z, Su W. Bromide-assisted chemoselective Heck reaction of 3-bromoindazoles under high-speed ball-milling conditions: synthesis of axitinib. Beilstein J Org Chem 2018; 14:786-795. [PMID: 29719575 PMCID: PMC5905281 DOI: 10.3762/bjoc.14.66] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/07/2018] [Accepted: 03/21/2018] [Indexed: 11/25/2022] Open
Abstract
A mechanically-activated chemoselective Heck coupling for the synthesis of 3-vinylindazoles has been developed with the aid of catalytic amounts of TBAB and NaBr as both dehalogenation restrainer and grinding auxiliary. After tuning of the chemical conditions and mechanical parameters, a series of non-activated 3-bromoindazoles and a broad scope of olefins worked well to give the corresponding coupling products in good to excellent yields. A further application of this protocol was performed in a two-step mechanochemical Heck/Migita cross coupling, which provided a highly efficient route for the synthesis of axitinib.
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Affiliation(s)
- Jingbo Yu
- Collaborative Innovation Center of Yangtze River Delta Region Green Pharmaceuticals, Zhejiang University of Technology, Hangzhou 310014, PR China
| | - Zikun Hong
- College of Pharmaceutical Sciences, Zhejiang University of Technology, Hangzhou 310014, PR China
| | - Xinjie Yang
- Collaborative Innovation Center of Yangtze River Delta Region Green Pharmaceuticals, Zhejiang University of Technology, Hangzhou 310014, PR China
| | - Yu Jiang
- Collaborative Innovation Center of Yangtze River Delta Region Green Pharmaceuticals, Zhejiang University of Technology, Hangzhou 310014, PR China
| | - Zhijiang Jiang
- Collaborative Innovation Center of Yangtze River Delta Region Green Pharmaceuticals, Zhejiang University of Technology, Hangzhou 310014, PR China
| | - Weike Su
- Collaborative Innovation Center of Yangtze River Delta Region Green Pharmaceuticals, Zhejiang University of Technology, Hangzhou 310014, PR China
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41
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Zukerman-Schpector J, Soto-Monsalve M, De Almeida Santos RH, Machado AHL, Correia CRD, Jotani MM, Tiekink ERT. (1 R,2 S,5 R)-5-Methyl-2-[2-(4-nitro-phen-yl)propan-2-yl]cyclo-hexyl 2-(4-meth-oxy-phen-yl)-2,5-di-hydro-1 H-pyrrole-1-carboxyl-ate: crystal structure and Hirshfeld analysis. Acta Crystallogr E Crystallogr Commun 2018; 74:414-418. [PMID: 29765735 PMCID: PMC5947815 DOI: 10.1107/s2056989018003092] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/02/2018] [Accepted: 02/22/2018] [Indexed: 11/10/2022]
Abstract
In the title compound, C28H34N2O5, the adjacent ester and nitro-benzene substituents are connected via an intra-molecular methyl-ene-C-H⋯π(nitrobenzene) inter-action and the mol-ecule approximates to a U-shape. The di-hydro-pyrrole ring (r.m.s. deviation = 0.003 Å) is almost co-planar with the carboxyl-ate residue [Cm-N-C1-Oc (m = methine, c = carbox-yl) torsion angle = 1.8 (4)°] but is orthogonal to the 4-meth-oxy-benzene ring [dihedral angle = 84.34 (17)°]. In the crystal, methyl-ene-C-H⋯O(carbon-yl) inter-actions lead to linear supra-molecular chains along the b-axis direction, which pack without directional inter-actions between them. The analysis of the calculated Hirshfeld surface points to the importance of weak inter-atomic H⋯H, O⋯H/H⋯O and C⋯H/H⋯C contacts in the crystal.
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Affiliation(s)
- Julio Zukerman-Schpector
- Laboratório de Cristalografia, Esterodinâmica e Modelagem Molecular, Departamento de Química, Universidade Federal de São Carlos, 13565-905 São Carlos, SP, Brazil
| | - Monica Soto-Monsalve
- Instituto de Química de São Carlos, Universidade de São Paulo, São Carlos, SP, Brazil
| | | | - Angelo H. L. Machado
- Instituto de Química, Universidade Estadual de Campinas, UNICAMP, C.P. 6154, CEP. 13084-971, Campinas, São Paulo, Brazil
| | - Carlos Roque D. Correia
- Instituto de Química, Universidade Estadual de Campinas, UNICAMP, C.P. 6154, CEP. 13084-971, Campinas, São Paulo, Brazil
| | - Mukesh M. Jotani
- Department of Physics, Bhavan’s Sheth R. A. College of Science, Ahmedabad, Gujarat 380001, India
| | - Edward R. T. Tiekink
- Centre for Crystalline Materials, School of Science and Technology, Sunway University, 47500 Bandar Sunway, Selangor Darul Ehsan, Malaysia
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Pan X, Tao L, Ji M, Chen X, Liu Z. Synthesis and cytotoxicity of novel imidazo[4,5-d]azepine compounds derived from marine natural product ceratamine A. Bioorg Med Chem Lett 2018; 28:866-868. [PMID: 29433924 DOI: 10.1016/j.bmcl.2018.02.004] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2017] [Revised: 02/01/2018] [Accepted: 02/02/2018] [Indexed: 11/19/2022]
Abstract
A series of novel imidazo[4,5-d]azepine compounds derived from marine natural product ceratamine A were designed and synthesized in 7 steps. Most compounds exhibited comparable cytotoxicity against five human cancer cell lines (HCT-116, HepG2, BGC-823, A549 and A2780) to natural product ceratamine A. Compound 1k, bearing methoxy group at C-14, C-15 and C-16, showed the best in vitro cytotoxicity, which was better than ceratamine A. The structure and activity relationships study showed that the benzyloxymethyl group on N-3 played an important role on the cytotoxicity.
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Affiliation(s)
- Xuan Pan
- State Key Laboratory of Bioactive Substances and Functions of Natural Medicines, Institute of Materia Medica, Peking Union Medical College and Chinese Academy of Medical Sciences, Beijing 100050, PR China
| | - Lulu Tao
- State Key Laboratory of Bioactive Substances and Functions of Natural Medicines, Institute of Materia Medica, Peking Union Medical College and Chinese Academy of Medical Sciences, Beijing 100050, PR China
| | - Ming Ji
- State Key Laboratory of Bioactive Substances and Functions of Natural Medicines, Institute of Materia Medica, Peking Union Medical College and Chinese Academy of Medical Sciences, Beijing 100050, PR China
| | - Xiaoguang Chen
- State Key Laboratory of Bioactive Substances and Functions of Natural Medicines, Institute of Materia Medica, Peking Union Medical College and Chinese Academy of Medical Sciences, Beijing 100050, PR China
| | - Zhanzhu Liu
- State Key Laboratory of Bioactive Substances and Functions of Natural Medicines, Institute of Materia Medica, Peking Union Medical College and Chinese Academy of Medical Sciences, Beijing 100050, PR China.
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43
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Wu H, Wang Q, Zhu J. Copper-Catalyzed Enantioselective Arylative Desymmetrization of Prochiral Cyclopentenes with Diaryliodonium Salts. Angew Chem Int Ed Engl 2018; 57:2721-2725. [PMID: 29323768 DOI: 10.1002/anie.201713329] [Citation(s) in RCA: 25] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/27/2017] [Indexed: 01/08/2023]
Abstract
A copper-catalyzed enantioselective arylative desymmetrization of prochiral cyclopentenes with diaryliodonium salts was developed. In the presence of a catalytic amount of a chiral copper-bisoxazoline complex, which was generated in situ, the reaction of 4-substituted or 4,4-disubstituted cyclopent-1-enes with diaryliodonium hexafluoroarsenates afforded the chiral arylated products in good yields with excellent enantioselectivity. A cyclohexyl-containing Box ligand was essential for the high enantioselectivity. Transformation of the enantiomerically enriched adducts into other chiral building blocks is also documented.
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Affiliation(s)
- Hua Wu
- Laboratory of Synthesis and Natural Products, Institute of Chemical Sciences and Engineering, Ecole Polytechnique Fédérale de Lausanne, EPFL-SB-ISIC-LSPN, BCH 5304, 1015, Lausanne, Switzerland
| | - Qian Wang
- Laboratory of Synthesis and Natural Products, Institute of Chemical Sciences and Engineering, Ecole Polytechnique Fédérale de Lausanne, EPFL-SB-ISIC-LSPN, BCH 5304, 1015, Lausanne, Switzerland
| | - Jieping Zhu
- Laboratory of Synthesis and Natural Products, Institute of Chemical Sciences and Engineering, Ecole Polytechnique Fédérale de Lausanne, EPFL-SB-ISIC-LSPN, BCH 5304, 1015, Lausanne, Switzerland
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44
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Jiang ZZ, Gao A, Li H, Chen D, Ding CH, Xu B, Hou XL. Enantioselective Synthesis of Chromenes via a Palladium-Catalyzed Asymmetric Redox-Relay Heck Reaction. Chem Asian J 2017; 12:3119-3122. [PMID: 29152880 DOI: 10.1002/asia.201701504] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/23/2017] [Revised: 11/13/2017] [Indexed: 12/12/2022]
Abstract
A palladium-catalyzed asymmetric redox-relay Heck reaction of 4H-chromenes and arylboronic acids has been successfully developed. The reaction proceeded in moderate to good yields with good to high enantioselectivities. The resulting product is an advanced intermediate of bio-active compound BW683C.
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Affiliation(s)
- Ze-Zhen Jiang
- Department of Chemistry, Innovative Drug Research Center, Shanghai University, Shanghai, 200444, China.,State Key Laboratory of Organometallic Chemistry, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, 345 Lingling Road, Shanghai, 200032, China
| | - Ang Gao
- State Key Laboratory of Organometallic Chemistry, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, 345 Lingling Road, Shanghai, 200032, China
| | - Hao Li
- Department of Chemistry, Innovative Drug Research Center, Shanghai University, Shanghai, 200444, China.,State Key Laboratory of Organometallic Chemistry, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, 345 Lingling Road, Shanghai, 200032, China
| | - Di Chen
- State Key Laboratory of Organometallic Chemistry, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, 345 Lingling Road, Shanghai, 200032, China
| | - Chang-Hua Ding
- State Key Laboratory of Organometallic Chemistry, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, 345 Lingling Road, Shanghai, 200032, China
| | - Bin Xu
- Department of Chemistry, Innovative Drug Research Center, Shanghai University, Shanghai, 200444, China
| | - Xue-Long Hou
- State Key Laboratory of Organometallic Chemistry, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, 345 Lingling Road, Shanghai, 200032, China
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45
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Wang Y, Dou L, Zhang H. Nanosheet Array-Like Palladium-Catalysts Pd x/rGO@CoAl-LDH via Lattice Atomic-Confined in Situ Reduction for Highly Efficient Heck Coupling Reaction. ACS Appl Mater Interfaces 2017; 9:38784-38795. [PMID: 29028354 DOI: 10.1021/acsami.7b11695] [Citation(s) in RCA: 36] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
A series of novel nanosheet array-like catalysts Pdx/rGO@CoAl-LDH (x = 0.0098-1.9, refers to Pd loading in wt % on ICP, rGO: reduced graphene oxide, LDH: layered double hydroxide) were first prepared via a simple and green lattice atomic-confined in situ reduction of oxidative Pd precursors by the evenly atomic-dispersed reductive Co2+ sites on LDH layers of a nanohybrid rGO@CoAl-LDH with hexagonal LDH nanoplates (∼73 × 7 nm) interdigitated vertical to the surfaces of rGO layer in both sides, fabricated through a simple citric acid-assisted aqueous-phase coprecipitation method. The as-obtained Pd catalysts possess clean Pd nanoclusters (NCs) with tunable sizes in 1.3-1.8 nm on varied Pd loadings. All the Pdx/rGO@CoAl-LDH catalysts show excellent activities for the Heck reaction, and the Pd0.0098/rGO@CoAl-LDH with the ultrafine Pd NCs of 1.3 ± 0.2 nm yields a maximum turnover frequency of 160 000 h-1 over a heterogeneous catalyst so far. The excellent activities can be attributed to the ultrasmall Pd NCs with high dispersion and clean Pd surfaces, increased electron transfer capacity and surface area, and remarkable Pd-CoAl-LDH-rGO three-phase synergistic effect of the present unique nanosheet array-like Pd NCs catalysts. Moreover, the catalyst Pd0.33/rGO@CoAl-LDH shows a broad range of substrate applicability and can be reused more than five runs without obvious loss of activity, giving the present catalysts long-term stability. These findings make the rGO@CoAl-LDH hybrid prepared by a facile and scalable synthesis route a universal green platform to support other noble or nonprecious metal NCs via lattice atomic-confined in situ reduction strategy to construct more desired heterogeneous catalysts.
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Affiliation(s)
- Yanna Wang
- The State Key Laboratory of Chemical Resource Engineering, Beijing University of Chemical Technology , P.O. Box 98, Beijing 100029, China
| | - Liguang Dou
- The State Key Laboratory of Chemical Resource Engineering, Beijing University of Chemical Technology , P.O. Box 98, Beijing 100029, China
| | - Hui Zhang
- The State Key Laboratory of Chemical Resource Engineering, Beijing University of Chemical Technology , P.O. Box 98, Beijing 100029, China
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Kurandina D, Parasram M, Gevorgyan V. Visible Light-Induced Room-Temperature Heck Reaction of Functionalized Alkyl Halides with Vinyl Arenes/Heteroarenes. Angew Chem Int Ed Engl 2017; 56:14212-14216. [PMID: 28941019 PMCID: PMC5728111 DOI: 10.1002/anie.201706554] [Citation(s) in RCA: 148] [Impact Index Per Article: 21.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/27/2017] [Indexed: 01/08/2023]
Abstract
The first visible light-induced Pd-catalyzed Heck reaction of α-heteroatom substituted alkyl iodides and -bromides with vinyl arenes/heteroarenes has been developed. This transformation efficiently proceeds at room temperature and enables synthesis of valuable functionalized allylic systems, such as allylic silanes, boronates, germanes, stannanes, pivalates, phosphonates, phthalimides, and tosylates from the corresponding α-substituted methyl iodides. Notably, synthesis of the latter substrates failed under existing thermally induced Pd-catalyzed conditions, which highlights the importance of visible light for this transformation.
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Affiliation(s)
- Daria Kurandina
- Department of Chemistry, University of Illinois at Chicago, 845 West Taylor Street, Chicago, Illinois, 60607-7061, USA
| | - Marvin Parasram
- Department of Chemistry, University of Illinois at Chicago, 845 West Taylor Street, Chicago, Illinois, 60607-7061, USA
| | - Vladimir Gevorgyan
- Department of Chemistry, University of Illinois at Chicago, 845 West Taylor Street, Chicago, Illinois, 60607-7061, USA
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Zhang D, Wei Z, Yu L. Easily fabricated and recyclable Pd&Cu@Al catalyst for gram-scale phosphine-free Heck reactions with high TON. Sci Bull (Beijing) 2017; 62:1325-1330. [PMID: 36659294 DOI: 10.1016/j.scib.2017.09.016] [Citation(s) in RCA: 39] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/08/2017] [Revised: 09/06/2017] [Accepted: 09/08/2017] [Indexed: 01/21/2023]
Abstract
A unique Pd&Cu@Al catalyst was easily fabricated just by immersing commercial aluminum foil in a mixed xylene solution of PdCl2 and CuCl2. The catalyst fabrication process led to aluminum oxide coatings in situ, which supported the metal nanoparticles and enhanced their catalytic activities for the phosphine-free Heck reaction of aryl halides and styrenes with high turnover number (TON) up to 3.9×105. The reaction can be scaled up to at least 100mmol and has been applied in modification of drug Lapatinib's intermediate with low metal residue. This novel catalyst is of good application potential in industrial production because it was extremely easy to be recycled, in regardless of the generation of the insoluble impurities or tars during the reaction processes.
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Affiliation(s)
- Dongliang Zhang
- Institute of Pesticide, School of Horticulture and Plant Protection, Yangzhou University, Yangzhou 225009, China; School of Chemistry and Chemical Engineering, Yangzhou University, Yangzhou 225002, China
| | - Zheng Wei
- School of Chemistry and Chemical Engineering, Yangzhou University, Yangzhou 225002, China
| | - Lei Yu
- Institute of Pesticide, School of Horticulture and Plant Protection, Yangzhou University, Yangzhou 225009, China; School of Chemistry and Chemical Engineering, Yangzhou University, Yangzhou 225002, China.
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Yang PC, Li SQ, Chien YH, Tao TL, Huang RY, Chen HY. Synthesis, Chemosensory Properties, and Self-Assembly of Terpyridine-Containing Conjugated Polycarbazole through RAFT Polymerization and Heck Coupling Reaction. Polymers (Basel) 2017; 9:E427. [PMID: 30965733 DOI: 10.3390/polym9090427] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/10/2017] [Revised: 09/01/2017] [Accepted: 09/04/2017] [Indexed: 01/22/2023] Open
Abstract
We report the responsive fluorescence chemosensory phenomena of a carbazole-functionalized crosslinked polymer (PCaT) with pendent terpyridine (tpy) groups as receptors of metal ions. The polymer was synthesized using Heck polymerization between 3,6-dibromide groups in a carbazole-based polymer (PC2Br) and divinyl tpy monomer. The effects of the polymeric structure on the optical and chemosensory properties of the PCaT were compared with those of a carbazole-tpy alternating conjugated polymer (PCT). Photoluminescence titrations demonstrated that the PCaT and PCT had the high sensing ability toward Fe3+ ions, with Stern–Volmer constants of 8.10 × 104 and 6.68 × 104 M−1, respectively. The limit of detection (LOD) toward Fe3+ of the PCaT and PCT was estimated to be 1.31 × 10−6 and 1.81 × 10−6 M, respectively, and the superior LOD of the PCaT was ascribed to its lowly crosslinked structure. The fluorescence of the solutions of these polymers that were quenched by Fe3+ ions recovered when trace CN− anions were added because of the high stability constant of the CN−–Fe3+ complex. Micellar aggregates with a mean diameter of approximately 239.5 nm were formed by dissolving the PCaT in tetrahydrofuran (THF) solution. Our results suggest that the PCaT is a promising material for chemosensory applications.
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Shi W, Yu J, Jiang Z, Shao Q, Su W. Encaging palladium(0) in layered double hydroxide: A sustainable catalyst for solvent-free and ligand-free Heck reaction in a ball mill. Beilstein J Org Chem 2017; 13:1661-1668. [PMID: 28904609 PMCID: PMC5564263 DOI: 10.3762/bjoc.13.160] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/22/2017] [Accepted: 07/18/2017] [Indexed: 11/25/2022] Open
Abstract
In this paper, the synthesis of a cheap, reusable and ligand-free Pd catalyst supported on MgAl layered double hydroxides (Pd/MgAl-LDHs) by co-precipitation and reduction methods is described. The catalyst was used in Heck reactions under high-speed ball milling (HSBM) conditions at room temperature. The effects of milling-ball size, milling-ball filling degree, reaction time, rotation speed and grinding auxiliary category, which would influence the yields of mechanochemical Heck reactions, were investigated in detail. The characterization results of XRD, ICP–MS and XPS suggest that Pd/MgAl-LDHs have excellent textural properties with zero-valence Pd on its layers. The reaction results indicate that the catalyst could be utilized in HSBM systems to afford a wide range of Heck coupling products in satisfactory yields. Furthermore, this catalyst could be easily recovered and reused for at least five times without significant loss of catalytic activity.
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Affiliation(s)
- Wei Shi
- National Engineering Research Center for Process Development of Active Pharmaceutical Ingredients, Collaborative Innovation Center of Yangtze River Delta Region Green Pharmaceuticals, Zhejiang University of Technology, Hangzhou, 310014, Zhejiang, China
| | - Jingbo Yu
- National Engineering Research Center for Process Development of Active Pharmaceutical Ingredients, Collaborative Innovation Center of Yangtze River Delta Region Green Pharmaceuticals, Zhejiang University of Technology, Hangzhou, 310014, Zhejiang, China
| | - Zhijiang Jiang
- National Engineering Research Center for Process Development of Active Pharmaceutical Ingredients, Collaborative Innovation Center of Yangtze River Delta Region Green Pharmaceuticals, Zhejiang University of Technology, Hangzhou, 310014, Zhejiang, China
| | - Qiaoling Shao
- National Engineering Research Center for Process Development of Active Pharmaceutical Ingredients, Collaborative Innovation Center of Yangtze River Delta Region Green Pharmaceuticals, Zhejiang University of Technology, Hangzhou, 310014, Zhejiang, China
| | - Weike Su
- National Engineering Research Center for Process Development of Active Pharmaceutical Ingredients, Collaborative Innovation Center of Yangtze River Delta Region Green Pharmaceuticals, Zhejiang University of Technology, Hangzhou, 310014, Zhejiang, China
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50
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Hattori T, Ueda S, Takakura R, Sawama Y, Monguchi Y, Sajiki H. Heterogeneous One-Pot Carbonylation and Mizoroki- Heck Reaction in a Parallel Manner Following the Cleavage of Cinnamaldehyde Derivatives. Chemistry 2017; 23:8196-8202. [PMID: 28263000 DOI: 10.1002/chem.201606048] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/29/2016] [Revised: 03/03/2017] [Indexed: 11/08/2022]
Abstract
Carbon monoxide (CO) and styrene derivatives that can be both generated by a palladium on carbon (Pd/C)-catalyzed carbon-carbon (C-C) bond cleavage reaction of cinnamaldehyde derivatives were effectively utilized in further palladium-catalyzed C-C bond forming reactions in a direct and practical way. CO derived from simple and affordable CO carriers such as cinnamaldehyde or terephthalaldehyde was efficiently employed in the in situ CO fixation with various aromatic iodides through a palladium-catalyzed carbonylation followed by an inter- or intramolecular coupling reaction with alcohols to afford the corresponding esters or lactones, respectively. Styrene derivatives were also efficient substrates in an in situ Mizoroki-Heck-type cross-coupling reaction with aryl iodides, leading to the effective formation of asymmetric stilbenes. The decarbonylation of cinnamaldehyde derivatives and the subsequent independent syntheses of both esters/lactones and 1,2-diarylethenes could be achieved in a virtual one-pot and in situ reaction using a H-shaped pressure-tight glass-sealed tube consisting of two independent but laterally connected reaction tubes in the gas space.
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Affiliation(s)
- Tomohiro Hattori
- Laboratory of Organic Chemistry, Gifu Pharmaceutical University, 1-25-4 Daigaku-nishi, 501-1196, Japan
| | - Shun Ueda
- Laboratory of Organic Chemistry, Gifu Pharmaceutical University, 1-25-4 Daigaku-nishi, 501-1196, Japan
| | - Ryoya Takakura
- Laboratory of Organic Chemistry, Gifu Pharmaceutical University, 1-25-4 Daigaku-nishi, 501-1196, Japan
| | - Yoshinari Sawama
- Laboratory of Organic Chemistry, Gifu Pharmaceutical University, 1-25-4 Daigaku-nishi, 501-1196, Japan
| | - Yasunari Monguchi
- Laboratory of Organic Chemistry, Gifu Pharmaceutical University, 1-25-4 Daigaku-nishi, 501-1196, Japan
| | - Hironao Sajiki
- Laboratory of Organic Chemistry, Gifu Pharmaceutical University, 1-25-4 Daigaku-nishi, 501-1196, Japan
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