1
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Canfield AM, Rodina D, Paradine SM. Dienes as Versatile Substrates for Transition Metal-Catalyzed Reactions. Angew Chem Int Ed Engl 2024; 63:e202401550. [PMID: 38436553 PMCID: PMC11078299 DOI: 10.1002/anie.202401550] [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: 01/23/2024] [Revised: 03/02/2024] [Accepted: 03/04/2024] [Indexed: 03/05/2024]
Abstract
Dienes have been of great interest to synthetic chemists as valuable substrates due to their abundance and ease of synthesis. Their unique stereoelectronic properties enable broad reactivity with a wide range of transition metals to construct molecular complexity facilitating synthesis of biologically active compounds. In addition, structural diene variation can result in substrate-controlled reactions, providing valuable mechanistic insights into reactivity and selectivity patterns. The last decade has seen a wealth of new methodologies involving diene substrates through the power of transition metal catalysis. This review summarizes recent advances and remaining opportunities for transition metal-catalyzed transformations involving dienes.
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Affiliation(s)
- Amanda M. Canfield
- Department of Chemistry, University of Rochester, 120 Trustee Road, Rochester, NY 14627
| | - Dasha Rodina
- Department of Chemistry, University of Rochester, 120 Trustee Road, Rochester, NY 14627
| | - Shauna M. Paradine
- Department of Chemistry, University of Rochester, 120 Trustee Road, Rochester, NY 14627
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2
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Wang J, Guo C, Liu Y, Ji Y, Jia H, Li H. Enantioselective Synthesis of the 1,3-Dienyl-5-Alkyl-6-Oxy Motif: Method Development and Total Synthesis. Angew Chem Int Ed Engl 2024; 63:e202400478. [PMID: 38270494 DOI: 10.1002/anie.202400478] [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: 01/08/2024] [Revised: 01/24/2024] [Accepted: 01/25/2024] [Indexed: 01/26/2024]
Abstract
The 1,3-dienyl-5-alkyl-6-oxy motif is widely found in various types of bioactive natural products. However, present synthesis is mainly non-asymmetric which relied upon different olefination or transition metal-catalyzed cross-coupling reactions using enantioenriched precursors. Herein, based upon a newly developed enantioselective α-alkylation of conjugated polyenoic acids, a variety of 1,3-dienyl-5-alkyl-6-oxy motif (with E-configured internal olefin) was generated as the corresponding α-adducts in a highly enantioselective and diastereoselective manner. Utilizing 1,3-dienyl-5-alkyl-6-oxy motif as key intermediates, we further demonstrated their synthetic potential by expedient total syntheses of three types of natural products (glutarimide antibiotics, α-pyrone polyketides and Lupin alkaloids) within 4-7 steps.
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Affiliation(s)
- Jie Wang
- State Key Laboratory of Natural and Biomimetic Drugs, Chemical Biology Center, School of Pharmaceutical Sciences, Peking University, Xue Yuan Road No. 38, Beijing, 100191, China
| | - Chuning Guo
- State Key Laboratory of Natural and Biomimetic Drugs, Chemical Biology Center, School of Pharmaceutical Sciences, Peking University, Xue Yuan Road No. 38, Beijing, 100191, China
| | - Yaqian Liu
- State Key Laboratory of Natural and Biomimetic Drugs, Chemical Biology Center, School of Pharmaceutical Sciences, Peking University, Xue Yuan Road No. 38, Beijing, 100191, China
| | - Yunpeng Ji
- State Key Laboratory of Natural and Biomimetic Drugs, Chemical Biology Center, School of Pharmaceutical Sciences, Peking University, Xue Yuan Road No. 38, Beijing, 100191, China
| | - Hongli Jia
- State Key Laboratory of Natural and Biomimetic Drugs, Chemical Biology Center, School of Pharmaceutical Sciences, Peking University, Xue Yuan Road No. 38, Beijing, 100191, China
| | - Houhua Li
- State Key Laboratory of Natural and Biomimetic Drugs, Chemical Biology Center, School of Pharmaceutical Sciences, Peking University, Xue Yuan Road No. 38, Beijing, 100191, China
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3
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Murugan S, Iqbal T, Das D. Functional production and biochemical investigation of an integral membrane enzyme for olefin biosynthesis. Protein Sci 2024; 33:e4893. [PMID: 38160318 PMCID: PMC10804661 DOI: 10.1002/pro.4893] [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] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/21/2023] [Revised: 12/24/2023] [Accepted: 12/28/2023] [Indexed: 01/03/2024]
Abstract
Integral membrane enzymes play essential roles in a plethora of biochemical processes. The fatty acid desaturases (FADS)-like superfamily is an important group of integral membrane enzymes that catalyze a wide array of reactions, including hydroxylation, desaturation, and cyclization; however, due to the membrane-bound nature, the majority of these enzymes have remained poorly understood. UndB is a member of the FADS-like superfamily, which catalyzes fatty acid decarboxylation, a chemically challenging reaction at the membrane interface. UndB reaction produces terminal olefins that are prominent biofuel candidates and building blocks of polymers with widespread industrial applications. Despite the great importance of UndB for several biotechnological applications, the enzyme has eluded comprehensive investigation. Here, we report details of the expression, solubilization, and purification of several constructs of UndB to achieve the optimally functional enzyme. We gained important insights into the biochemical, biophysical, and catalytic properties of UndB, including the thermal stability and factors influencing the enzyme activity. Additionally, we established the ability and kinetics of UndB to produce dienes by performing di-decarboxylation of diacids. We found that the reaction proceeds by forming a mono-carboxylic acid intermediate. Our findings shed light on the unexplored biochemical properties of the UndB and extend opportunities for its rigorous mechanistic and structural characterization.
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Affiliation(s)
- Subhashini Murugan
- Department of Inorganic and Physical ChemistryIndian Institute of ScienceBangaloreIndia
| | - Tabish Iqbal
- Department of Inorganic and Physical ChemistryIndian Institute of ScienceBangaloreIndia
| | - Debasis Das
- Department of Inorganic and Physical ChemistryIndian Institute of ScienceBangaloreIndia
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4
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Ding R, Li L, Yu YT, Zhang B, Wang PL. Photoredox-Catalyzed Synthesis of 3-Sulfonylated Pyrrolin-2-ones via a Regioselective Tandem Sulfonylation Cyclization of 1,5- Dienes. Molecules 2023; 28:5473. [PMID: 37513345 PMCID: PMC10386375 DOI: 10.3390/molecules28145473] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [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: 05/24/2023] [Revised: 07/09/2023] [Accepted: 07/10/2023] [Indexed: 07/30/2023] Open
Abstract
A mild, visible-light-induced, regioselective cascade sulfonylation-cyclization of 1,5-dienes with sulfonyl chlorides through the intermolecular radical addition/cyclization of alkenes C(sp2)-H was developed. This procedure proceeds well and affords a mild and efficient route to a range of monosulfonylated pyrrolin-2-ones at room temperatures.
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Affiliation(s)
- Ran Ding
- College of Chemistry and Materials Engineering, Anhui Science and Technology University, Bengbu 233100, China
| | - Liang Li
- College of Chemistry and Materials Engineering, Anhui Science and Technology University, Bengbu 233100, China
| | - Ya-Ting Yu
- College of Chemistry and Materials Engineering, Anhui Science and Technology University, Bengbu 233100, China
| | - Bing Zhang
- College of Chemistry and Materials Engineering, Anhui Science and Technology University, Bengbu 233100, China
| | - Pei-Long Wang
- Key Laboratory of Green and Precise Synthetic Chemistry and Applications, Ministry of Education, School of Chemistry and Materials Science, Huaibei Normal University, Huaibei 235000, China
- Information College, Huaibei Normal University, Huaibei 235000, China
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5
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Nifant'ev IE, Salakhov II, Ivchenko PV. Transition Metal-(μ-Cl)-Aluminum Bonding in α-Olefin and Diene Chemistry. Molecules 2022; 27. [PMID: 36363991 DOI: 10.3390/molecules27217164] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [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: 09/30/2022] [Revised: 10/19/2022] [Accepted: 10/20/2022] [Indexed: 11/06/2022] Open
Abstract
Olefin and diene transformations, catalyzed by organoaluminum-activated metal complexes, are widely used in synthetic organic chemistry and form the basis of major petrochemical processes. However, the role of M−(μ-Cl)−Al bonding, being proven for certain >C=C< functionalization reactions, remains unclear and debated for essentially more important industrial processes such as oligomerization and polymerization of α-olefins and conjugated dienes. Numerous publications indirectly point at the significance of M−(μ-Cl)−Al bonding in Ziegler−Natta and related transformations, but only a few studies contain experimental or at least theoretical evidence of the involvement of M−(μ-Cl)−Al species into catalytic cycles. In the present review, we have compiled data on the formation of M−(μ-Cl)−Al complexes (M = Ti, Zr, V, Cr, Ni), their molecular structure, and reactivity towards olefins and dienes. The possible role of similar complexes in the functionalization, oligomerization and polymerization of α-olefins and dienes is discussed in the present review through the prism of the further development of Ziegler−Natta processes and beyond.
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6
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Wilson KB, Nedzbala HS, Simpson SR, Ericson MN, Westendorff KS, Chordia MD, Dickie DA, Harman WD. Hydroamination of Dihapto-Coordinated Benzene and Diene Complexes of Tungsten: Fundamental Studies and the Synthesis of γ-Lycorane. Helv Chim Acta 2022; 104. [PMID: 35125509 DOI: 10.1002/hlca.202100103] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
Reactions are described for complexes of the form WTp(NO)(PMe3)(η2-arene) and various amines, where the arene is benzene or benzene with an electron-withdrawing substituent (CF3, SO2Ph, SO2Me). The arene complex is first protonated to form an η2-arenium species, which then selectively adds the amine. The resulting η2-5-amino-1,3-cyclohexadiene complexes can then be subjected to the same sequence with a second nucleophile to form 3-aminocyclohexene complexes, where up to three stereocenters originate from the arene carbons. Alternatively, 1,3-cyclohexadiene complexes containing an ester group at the 5 position (also prepared from an arene) can be treated with acid followed by an amine to form trisubstituted 3-aminocyclohexenes. When the amine is primary, ring closure can occur to form a cis-fused bicyclic γ-lactam. Highly functionalized cyclohexenes can be liberated from the tungsten through oxidative decomplexation. The potential utility of this methodology is demonstrated in the synthesis of the alkaloid γ-lycorane. An enantioenriched synthesis of a lactam precursor to γ-lycorane is also described. This compound is prepared from an enantioenriched version of the tungsten benzene complex. Regio- and stereochemical assignments for the reported compounds are supported by detailed 2D-NMR analysis and 13 molecular structure determinations (SC-XRD).
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Affiliation(s)
- Katy B Wilson
- Department of Chemistry, University of Virginia, Charlottesville, Virginia, 22904, USA
| | - Hannah S Nedzbala
- Department of Chemistry, University of Virginia, Charlottesville, Virginia, 22904, USA
| | - Spenser R Simpson
- Department of Chemistry, University of Virginia, Charlottesville, Virginia, 22904, USA
| | - Megan N Ericson
- Department of Chemistry, University of Virginia, Charlottesville, Virginia, 22904, USA
| | - Karl S Westendorff
- Department of Chemistry, University of Virginia, Charlottesville, Virginia, 22904, USA
| | - Mahendra D Chordia
- Department of Chemistry, University of Virginia, Charlottesville, Virginia, 22904, USA
| | - Diane A Dickie
- Department of Chemistry, University of Virginia, Charlottesville, Virginia, 22904, USA
| | - W Dean Harman
- Department of Chemistry, University of Virginia, Charlottesville, Virginia, 22904, USA
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7
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Yang J, Liu J, Ge Y, Huang W, Ferretti F, Neumann H, Jiao H, Franke R, Jackstell R, Beller M. Efficient Palladium-Catalyzed Carbonylation of 1,3- Dienes: Selective Synthesis of Adipates and Other Aliphatic Diesters. Angew Chem Int Ed Engl 2021; 60:9527-9533. [PMID: 33448531 PMCID: PMC8251817 DOI: 10.1002/anie.202015329] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [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: 11/17/2020] [Revised: 01/08/2021] [Indexed: 02/06/2023]
Abstract
The dicarbonylation of 1,3‐butadiene to adipic acid derivatives offers the potential for a more cost‐efficient and environmentally benign industrial process. However, the complex reaction network of regioisomeric carbonylation and isomerization pathways, make a selective and direct transformation particularly difficult. Here, we report surprising solvent effects on this palladium‐catalysed process in the presence of 1,2‐bis‐di‐tert‐butylphosphin‐oxylene (dtbpx) ligands, which allow adipate diester formation from 1,3‐butadiene, carbon monoxide, and methanol with 97 % selectivity and 100 % atom‐economy under scalable conditions. Under optimal conditions a variety of di‐ and triesters from 1,2‐ and 1,3‐dienes can be obtained in good to excellent yields.
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Affiliation(s)
- Ji Yang
- Leibniz-Institut für Katalyse e. V., Albert-Einstein-Straße 29a, 18059, Rostock, Germany
| | - Jiawang Liu
- Leibniz-Institut für Katalyse e. V., Albert-Einstein-Straße 29a, 18059, Rostock, Germany
| | - Yao Ge
- Leibniz-Institut für Katalyse e. V., Albert-Einstein-Straße 29a, 18059, Rostock, Germany
| | - Weiheng Huang
- Leibniz-Institut für Katalyse e. V., Albert-Einstein-Straße 29a, 18059, Rostock, Germany
| | - Francesco Ferretti
- Leibniz-Institut für Katalyse e. V., Albert-Einstein-Straße 29a, 18059, Rostock, Germany
| | - Helfried Neumann
- Leibniz-Institut für Katalyse e. V., Albert-Einstein-Straße 29a, 18059, Rostock, Germany
| | - Haijun Jiao
- Leibniz-Institut für Katalyse e. V., Albert-Einstein-Straße 29a, 18059, Rostock, Germany
| | - Robert Franke
- Evonik Operations GmbH, Paul-Baumann-Str. 1, 45772, Marl, Germany.,Lehrstuhl für Theoretische Chemie, Ruhr-Universität Bochum, 44780, Bochum, Germany
| | - Ralf Jackstell
- Leibniz-Institut für Katalyse e. V., Albert-Einstein-Straße 29a, 18059, Rostock, Germany
| | - Matthias Beller
- Leibniz-Institut für Katalyse e. V., Albert-Einstein-Straße 29a, 18059, Rostock, Germany
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8
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Tobal IE, Bautista R, Diez D, Garrido NM, García-García P. 1,3-Cyclohexadien-1-Als: Synthesis, Reactivity and Bioactivities. Molecules 2021; 26:1772. [PMID: 33809941 DOI: 10.3390/molecules26061772] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [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: 02/19/2021] [Revised: 03/09/2021] [Accepted: 03/12/2021] [Indexed: 11/16/2022] Open
Abstract
In synthetic organic chemistry, there are very useful basic compounds known as building blocks. One of the main reactions wherein they are applied for the synthesis of complex molecules is the Diels-Alder cycloaddition. This reaction is between a diene and a dienophile. Among the most important dienes are the cyclic dienes, as they facilitate the reaction. This review considers the synthesis and reactivity of one of these dienes with special characteristics-it is cyclic and has an electron withdrawing group. This building block has been used for the synthesis of biologically active compounds and is present in natural compounds with interesting properties.
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9
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de Souza WC, Matsuo BT, Matos PM, Correia JTM, Santos MS, König B, Paixão MW. Photocatalyzed Intramolecular [2+2] Cycloaddition of N-Alkyl-N-(2-(1-arylvinyl)aryl)cinnamamides. Chemistry 2021; 27:3722-3728. [PMID: 32955792 DOI: 10.1002/chem.202003641] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [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: 08/05/2020] [Indexed: 02/05/2023]
Abstract
N-Alkyl-N-(2-(1-arylvinyl)aryl)cinnamamides are converted into natural product inspired scaffolds via iridium photocatalyzed intramolecular [2+2] photocycloaddition. The protocol has a broad substrate scope, whilst operating under mild reaction conditions. Tethering four components forming a trisubstituted cyclobutane core builds rapidly high molecular complexity. Our approach allows the design and synthesis of a variety of tetrahydrocyclobuta[c]quinolin-3(1H)-ones, in yields ranging between 20-99 %, and with excellent regio- and diastereoselectivity. Moreover, it was demonstrated that the intramolecular [2+2]-cycloaddition of 1,7-enynes-after fragmentation of the cyclobutane ring-leads to enyne-metathesis-like products.
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Affiliation(s)
- Wanderson C de Souza
- Department of Chemistry, Federal University of São Carlos-UFSCar, Centre of Excellence for Research in Sustainable Chemistry, (CERSusChem), São Carlos, São Paulo, Brazil
| | - Bianca T Matsuo
- Department of Chemistry, Federal University of São Carlos-UFSCar, Centre of Excellence for Research in Sustainable Chemistry, (CERSusChem), São Carlos, São Paulo, Brazil
| | - Priscilla M Matos
- Department of Chemistry, Federal University of São Carlos-UFSCar, Centre of Excellence for Research in Sustainable Chemistry, (CERSusChem), São Carlos, São Paulo, Brazil
| | - José Tiago M Correia
- Department of Chemistry, Federal University of São Carlos-UFSCar, Centre of Excellence for Research in Sustainable Chemistry, (CERSusChem), São Carlos, São Paulo, Brazil
| | - Marilia S Santos
- Department of Chemistry, Federal University of São Carlos-UFSCar, Centre of Excellence for Research in Sustainable Chemistry, (CERSusChem), São Carlos, São Paulo, Brazil.,Institut für Organische Chemie, Universität Regensburg, Universitätsstrasse 31, 93053, Regensburg, Germany
| | - Burkhard König
- Institut für Organische Chemie, Universität Regensburg, Universitätsstrasse 31, 93053, Regensburg, Germany
| | - Marcio W Paixão
- Department of Chemistry, Federal University of São Carlos-UFSCar, Centre of Excellence for Research in Sustainable Chemistry, (CERSusChem), São Carlos, São Paulo, Brazil
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10
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Minami Y, Furuya Y, Hiyama T. Facile Construction of Furanoacenes by a Three-Step Sequence Going through Disilyl-exo-cyclic Dienes. Chemistry 2020; 26:9471-9474. [PMID: 32181527 DOI: 10.1002/chem.202001119] [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: 03/04/2020] [Indexed: 11/07/2022]
Abstract
Facile synthesis of various benzonaphthofurans was achieved by intramolecular hydroarylation of 1,4-disilyl-2-aryloxy-1,3-enynes followed by cycloaddition with arynes or alkenes and finally desilylaromatization. The three-step transformation can be operated sequentially in one-pot, providing with a range of furanoacenes easily and highly effectively.
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Affiliation(s)
- Yasunori Minami
- Interdisciplinary Research Center for Catalytic Chemistry, National Institute of Advanced Industrial Science and Technology, 1-1-1, Higashi, Tsukuba, Ibaraki, 305-8565, Japan.,Research and Development Initiative, Chuo University, 1-13-27, Kasuga, Bunkyo-ku, Tokyo, 112-8551, Japan
| | - Yuki Furuya
- Department of Applied Chemistry, Chuo University, 1-13-27, Kasuga, Bunkyo-ku, Tokyo, 112-8551, Japan
| | - Tamejiro Hiyama
- Research and Development Initiative, Chuo University, 1-13-27, Kasuga, Bunkyo-ku, Tokyo, 112-8551, Japan
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11
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Ni D, Witherspoon BP, Zhang H, Zhou C, Houk KN, Brown MK. Stereoselective [4+2]-Cycloaddition with Chiral Alkenylboranes. Angew Chem Int Ed Engl 2020; 59:11432-11439. [PMID: 32390259 DOI: 10.1002/anie.202000652] [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] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/14/2020] [Revised: 03/21/2020] [Indexed: 11/08/2022]
Abstract
A method for the stereoselective [4+2]-cycloaddition of alkenylboranes and dienes is presented. This transformation was accomplished through the introduction of a new strategy that involves the use of chiral N-protonated alkenyl oxazaborolidines as dieneophiles. The reaction leads to the formation of products that can be readily derivatized to more complex structural motifs through stereospecific transformations of the C-B bond such as oxidation and homologation. Detailed computation evaluation of the reaction has uncovered a surprising role of the counterion on stereoselectivity.
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Affiliation(s)
- Dongshun Ni
- Department of Chemistry, Indiana University, 800 E. Kirkwood Ave., Bloomington, IN, 47401, USA
| | - Brittany P Witherspoon
- Current Address: Janssen Research & Development, LLC, 3210 Merryfield Row, San Diego, CA, 92121, USA
| | - Hong Zhang
- Department of Chemistry and Biochemistry, University of California, Los Angeles, CA, 90095, USA.,Current Address: College of Chemistry and Chemical Engineering, Xiamen University, Xiamen, 361005, China
| | - Chen Zhou
- Department of Chemistry, Indiana University, 800 E. Kirkwood Ave., Bloomington, IN, 47401, USA
| | - K N Houk
- Department of Chemistry and Biochemistry, University of California, Los Angeles, CA, 90095, USA
| | - M Kevin Brown
- Department of Chemistry, Indiana University, 800 E. Kirkwood Ave., Bloomington, IN, 47401, USA
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12
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Abstract
Chemical transformations based on cascade reactions have the potential to simplify the preparation of diverse and architecturally complex molecules dramatically. Herein, we disclose an unprecedented and efficient method for the cross-coupling of radical precursors, dienes, and electrophilic coupling partners via a photoredox- and nickel-enabled cascade cross-coupling process. The cascade reaction furnishes a diverse array of saturated carbo- and heterocyclic scaffolds, thus providing access to a quick gain in C-C bond saturation.
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Affiliation(s)
- Long Huang
- Institute of Organic ChemistryRWTH Aachen UniversityLandoltweg 152074AachenGermany
| | - Chen Zhu
- KAUST Catalysis Center (KCC)King Abdullah University of Science and Technology (KAUST)Thuwal23955-6900Saudi Arabia
| | - Liang Yi
- Institute of Organic ChemistryRWTH Aachen UniversityLandoltweg 152074AachenGermany
| | - Huifeng Yue
- KAUST Catalysis Center (KCC)King Abdullah University of Science and Technology (KAUST)Thuwal23955-6900Saudi Arabia
| | - Rajesh Kancherla
- KAUST Catalysis Center (KCC)King Abdullah University of Science and Technology (KAUST)Thuwal23955-6900Saudi Arabia
| | - Magnus Rueping
- Institute of Organic ChemistryRWTH Aachen UniversityLandoltweg 152074AachenGermany
- KAUST Catalysis Center (KCC)King Abdullah University of Science and Technology (KAUST)Thuwal23955-6900Saudi Arabia
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13
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Pünner F, Schmidt A, Hilt G. Corrigendum: Up the Hill: Selective Double-Bond Isomerization of Terminal 1,3- Dienes towards Z-1,3-Dienes or 2Z,4E-Dienes. Angew Chem Int Ed Engl 2019; 58:17103. [PMID: 31736259 DOI: 10.1002/anie.201902504] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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14
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Li C, Shin K, Liu RY, Buchwald SL. Engaging Aldehydes in CuH-Catalyzed Reductive Coupling Reactions: Stereoselective Allylation with Unactivated 1,3-Diene Pronucleophiles. Angew Chem Int Ed Engl 2019; 58:17074-17080. [PMID: 31552701 DOI: 10.1002/anie.201911008] [Citation(s) in RCA: 38] [Impact Index Per Article: 7.6] [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: 08/28/2019] [Revised: 09/23/2019] [Indexed: 12/13/2022]
Abstract
Recently, CuH-catalyzed reductive coupling processes involving carbonyl compounds and imines have become attractive alternatives to traditional methods for stereoselective addition because of their ability to use readily accessible and stable olefins as surrogates for organometallic nucleophiles. However, the inability to use aldehydes, which usually reduce too rapidly in the presence of copper hydride complexes to be viable substrates, has been a major limitation. Shown here is that by exploiting relative concentration effects through kinetic control, this intrinsic reactivity can be inverted and the reductive coupling of 1,3-dienes with aldehydes achieved. Using this method, both aromatic and aliphatic aldehydes can be transformed into synthetically valuable homoallylic alcohols with high levels of diastereo- and enantioselectivities, and in the presence of many useful functional groups. Furthermore, using a combination of theoretical (DFT) and experimental methods, important mechanistic features of this reaction related to stereo- and chemoselectivities were uncovered.
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Affiliation(s)
- Chengxi Li
- Department of Chemistry, Massachusetts Institute of Technology, Cambridge, Massachusetts, 02139, USA
| | - Kwangmin Shin
- Department of Chemistry, Massachusetts Institute of Technology, Cambridge, Massachusetts, 02139, USA
| | - Richard Y Liu
- Department of Chemistry, Massachusetts Institute of Technology, Cambridge, Massachusetts, 02139, USA
| | - Stephen L Buchwald
- Department of Chemistry, Massachusetts Institute of Technology, Cambridge, Massachusetts, 02139, USA
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15
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Li X, Ma X, Wang Z, Liu PN, Zhang L. Bifunctional Phosphine Ligand Enabled Gold-Catalyzed Alkynamide Cycloisomerization: Access to Electron-Rich 2-Aminofurans and Their Diels-Alder Adducts. Angew Chem Int Ed Engl 2019; 58:17180-17184. [PMID: 31531919 DOI: 10.1002/anie.201908598] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [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: 07/10/2019] [Revised: 08/30/2019] [Indexed: 11/09/2022]
Abstract
By using biphenyl-2-ylphosphines functionalized with a remote tertiary amino group as a ligand, readily available acetylenic amides are directly converted into 2-aminofurans devoid of any electron-withdrawing and hence deactivating/stabilizing substituents. These highly electron-rich furans have rarely been prepared, let alone applied in synthesis, because of their high reactivities and low stabilities associated with the electron-rich nature of the furan ring. In this work, these reactive furans smoothly undergo either in situ intermolecular Diels-Alder reactions to deliver highly functionalized/substituted aniline products or intramolecular ones to furnish carbazole-4-carboxylates in mostly good to excellent yields. This work offers general and expedient access to this class of little studies electron-rich furans and should lead to exciting opportunities for their applications.
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Affiliation(s)
- Xingguang Li
- Department of Chemistry and Biochemistry, University of California, Santa Barbara, CA, 93106, USA.,Shanghai Key Laboratory of Functional Materials Chemistry, Key Lab for Advanced Materials and Institute of Fine Chemicals, East China University of Science and Technology, Meilong Road 130, Shanghai, 200237, China
| | - Xu Ma
- Department of Chemistry and Biochemistry, University of California, Santa Barbara, CA, 93106, USA
| | - Zhixun Wang
- Department of Chemistry and Biochemistry, University of California, Santa Barbara, CA, 93106, USA
| | - Pei-Nian Liu
- Shanghai Key Laboratory of Functional Materials Chemistry, Key Lab for Advanced Materials and Institute of Fine Chemicals, East China University of Science and Technology, Meilong Road 130, Shanghai, 200237, China
| | - Liming Zhang
- Department of Chemistry and Biochemistry, University of California, Santa Barbara, CA, 93106, USA
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16
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Pinkert T, Wegner T, Mondal S, Glorius F. Intermolecular 1,4-Carboamination of Conjugated Dienes Enabled by Cp*Rh III -Catalyzed C-H Activation. Angew Chem Int Ed Engl 2019; 58:15041-15045. [PMID: 31389654 DOI: 10.1002/anie.201907269] [Citation(s) in RCA: 53] [Impact Index Per Article: 10.6] [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: 06/11/2019] [Indexed: 11/09/2022]
Abstract
A protocol for the three-component 1,4-carboamination of dienes is described. Synthetically versatile Weinreb amides were coupled with 1,3-dienes and readily available dioxazolones as the nitrogen source using [Cp*RhCl2 ]2 -catalyzed C-H activation to deliver the 1,4-carboaminated products. This transformation proceeds under mild reaction conditions and affords the products with high levels of regio- and E-selectivity. Mechanistic investigations suggest an intermediate RhIII -allyl species is trapped by an electrophilic amidation reagent in a redox-neutral fashion.
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Affiliation(s)
- Tobias Pinkert
- Organisch-Chemisches Institut, Westfälische Wilhelms-Universität Münster, Corrensstraße 40, 48149, Münster, Germany
| | - Tristan Wegner
- Organisch-Chemisches Institut, Westfälische Wilhelms-Universität Münster, Corrensstraße 40, 48149, Münster, Germany
| | - Shobhan Mondal
- Organisch-Chemisches Institut, Westfälische Wilhelms-Universität Münster, Corrensstraße 40, 48149, Münster, Germany
| | - Frank Glorius
- Organisch-Chemisches Institut, Westfälische Wilhelms-Universität Münster, Corrensstraße 40, 48149, Münster, Germany
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17
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Huang L, Gu Y, Fürstner A. Iron-Catalyzed Reactions of 2-Pyridone Derivatives: 1,6-Addition and Formal Ring Opening/Cross Coupling. Chem Asian J 2019; 14:4017-4023. [PMID: 31274217 PMCID: PMC7687238 DOI: 10.1002/asia.201900865] [Citation(s) in RCA: 9] [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: 06/25/2019] [Indexed: 11/15/2022]
Abstract
In the presence of simple iron salts, 2‐pyridone derivatives react with Grignard reagents under mild conditions to give the corresponding 1,6‐addition products; if the reaction medium is supplemented with an aprotic dipolar cosolvent after the actual addition step, the intermediates primarily formed succumb to ring opening, giving rise to non‐thermodynamic Z,E‐configured dienoic acid amide derivatives which are difficult to make otherwise. Control experiments as well as the isolation and crystallographic characterization of a (tricarbonyl)iron pyridone complex suggest that the active iron catalyst generated in situ exhibits high affinity to the polarized diene system embedded into the heterocyclic ring system of the substrates, which likely serves as the actual recognition element.
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Affiliation(s)
- Lin Huang
- Max-Planck-Institut für Kohlenforschung, 45470, Mülheim/Ruhr, Germany
| | - Yiting Gu
- Max-Planck-Institut für Kohlenforschung, 45470, Mülheim/Ruhr, Germany
| | - Alois Fürstner
- Max-Planck-Institut für Kohlenforschung, 45470, Mülheim/Ruhr, Germany
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18
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Lin JS, Li TT, Jiao GY, Gu QS, Cheng JT, Lv L, Liu XY. Chiral Brønsted Acid Catalyzed Dynamic Kinetic Asymmetric Hydroamination of Racemic Allenes and Asymmetric Hydroamination of Dienes. Angew Chem Int Ed Engl 2019; 58:7092-7096. [PMID: 30919531 DOI: 10.1002/anie.201900955] [Citation(s) in RCA: 30] [Impact Index Per Article: 6.0] [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: 01/24/2019] [Revised: 03/19/2019] [Indexed: 12/31/2022]
Abstract
The first highly efficient and practical chiral Brønsted acid catalyzed dynamic kinetic asymmetric hydroamination (DyKAH) of racemic allenes and asymmetric hydroamination of unactivated dienes with both high E/Z selectivity and enantioselectivity are described herein. The transformation proceeds through a new catalytic asymmetric model involving a highly reactive π-allylic carbocationic intermediate, generated from racemic allenes or dienes through a proton transfer mediated by an activating/directing thiourea group. This method affords expedient access to structurally diverse enantioenriched, potentially bioactive alkenyl-containing aza-heterocycles and bicyclic aza-heterocycles.
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Affiliation(s)
- Jin-Shun Lin
- State Key Laboratory of Chemical Oncogenomics, Key Laboratory of Chemical Biology, Graduate School at Shenzhen, Tsinghua University, Shenzhen, 518055, China.,Department of Chemistry, Tsinghua University, Beijing, 100084, China.,Department of Chemistry and Shenzhen Grubbs Institute, Southern University of Science and Technology, Shenzhen, 518055, China
| | - Tao-Tao Li
- Department of Chemistry and Shenzhen Grubbs Institute, Southern University of Science and Technology, Shenzhen, 518055, China
| | - Guan-Yuan Jiao
- Department of Chemistry and Shenzhen Grubbs Institute, Southern University of Science and Technology, Shenzhen, 518055, China
| | - Qiang-Shuai Gu
- Academy for Advanced Interdisciplinary Studies and Department of Chemistry, Southern University of Science and Technology, Shenzhen, 518055, China
| | - Jiang-Tao Cheng
- Department of Chemistry and Shenzhen Grubbs Institute, Southern University of Science and Technology, Shenzhen, 518055, China
| | - Ling Lv
- Department of Chemistry and Shenzhen Grubbs Institute, Southern University of Science and Technology, Shenzhen, 518055, China
| | - Xin-Yuan Liu
- Department of Chemistry and Shenzhen Grubbs Institute, Southern University of Science and Technology, Shenzhen, 518055, China
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19
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González J, de la Fuente A, González MJ, Díez de Tejada L, López LA, Vicente R. Synthesis of 1,2-divinylcyclopropanes by metal-catalyzed cyclopropanation of 1,3- dienes with cyclopropenes as vinyl carbene precursors. Beilstein J Org Chem 2019; 15:285-290. [PMID: 30800178 PMCID: PMC6369990 DOI: 10.3762/bjoc.15.25] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [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: 10/30/2018] [Accepted: 01/11/2019] [Indexed: 12/15/2022] Open
Abstract
The synthesis of 1,2-divinylcyclopropanes by the reaction of cyclopropenes with 1,3-dienes is reported. The process relies on the ability of ZnCl2 or [Rh2(OAc)4] to generate metal-vinyl carbene intermediates from cyclopropenes, which effect cyclopropanation of 1,3-dienes. Most of the reactions proceeded in reasonable yields while the diastereoselectivity strongly depends on the structure of the diene. An example of an intramolecular process as well as the use of furan and 1,4-cyclohexadiene as dienes are also reported.
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Affiliation(s)
- Jesús González
- Departmento de Química Orgánica e Inorgánica e Instituto Universitario de Química Organometálica "Enrique Moles", Universidad de Oviedo, Julián Clavería 8, 33006-Oviedo, Spain
| | - Alba de la Fuente
- Departmento de Química Orgánica e Inorgánica e Instituto Universitario de Química Organometálica "Enrique Moles", Universidad de Oviedo, Julián Clavería 8, 33006-Oviedo, Spain
| | - María J González
- Departmento de Química Orgánica e Inorgánica e Instituto Universitario de Química Organometálica "Enrique Moles", Universidad de Oviedo, Julián Clavería 8, 33006-Oviedo, Spain
| | - Laura Díez de Tejada
- Departmento de Química Orgánica e Inorgánica e Instituto Universitario de Química Organometálica "Enrique Moles", Universidad de Oviedo, Julián Clavería 8, 33006-Oviedo, Spain
| | - Luis A López
- Departmento de Química Orgánica e Inorgánica e Instituto Universitario de Química Organometálica "Enrique Moles", Universidad de Oviedo, Julián Clavería 8, 33006-Oviedo, Spain
| | - Rubén Vicente
- Departmento de Química Orgánica e Inorgánica e Instituto Universitario de Química Organometálica "Enrique Moles", Universidad de Oviedo, Julián Clavería 8, 33006-Oviedo, Spain
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20
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Fan T, Wang A, Li JQ, Ye JL, Zheng X, Huang PQ. Versatile One-Pot Synthesis of Polysubstituted Cyclopent-2-enimines from α,β-Unsaturated Amides: Imino-Nazarov Reaction. Angew Chem Int Ed Engl 2018; 57:10352-10356. [PMID: 29924902 DOI: 10.1002/anie.201805641] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.8] [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: 05/15/2018] [Indexed: 01/03/2023]
Abstract
The imino-Nazarov cyclization of the polysubstituted pentan-1,4-diene-3-imines was realized. To this aim, a one-pot procedure involving reductive alkenyliminylation of α,β-unsaturated secondary amides with potassium organotrifluoroborates, followed by acid-catalyzed imino-Nazarov cyclization of the polysubstituted pentan-1,4-diene-3-imine intermediates, was studied systematically. This mild, operationally simple, flexible, and high-yielding protocol efficiently affords polysubstituted pentan-1,4-diene-3-imines, cyclopentenimines, and α-amino cyclopentenones, which are useful scaffolds in organic synthesis. The substituent effect at the C2 position of the polysubstituted pentan-1,4-diene-3-imines was studied by means of density-functional theory calculations. Results suggested that the electron-donating group facilitates the imino-Nazarov cyclization process.
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Affiliation(s)
- Ting Fan
- Department of Chemistry, Fujian Provincial Key Laboratory of Chemical Biology, iChEM (Collaborative Innovation Center of Chemistry for Energy Materials), College of Chemistry and Chemical Engineering, Xiamen University, Xiamen, Fujian, 361005, P. R. China
| | - Ao Wang
- Department of Chemistry, Fujian Provincial Key Laboratory of Chemical Biology, iChEM (Collaborative Innovation Center of Chemistry for Energy Materials), College of Chemistry and Chemical Engineering, Xiamen University, Xiamen, Fujian, 361005, P. R. China
| | - Jia-Qi Li
- Department of Chemistry, Fujian Provincial Key Laboratory of Chemical Biology, iChEM (Collaborative Innovation Center of Chemistry for Energy Materials), College of Chemistry and Chemical Engineering, Xiamen University, Xiamen, Fujian, 361005, P. R. China
| | - Jian-Liang Ye
- Department of Chemistry, Fujian Provincial Key Laboratory of Chemical Biology, iChEM (Collaborative Innovation Center of Chemistry for Energy Materials), College of Chemistry and Chemical Engineering, Xiamen University, Xiamen, Fujian, 361005, P. R. China
| | - Xiao Zheng
- Department of Chemistry, Fujian Provincial Key Laboratory of Chemical Biology, iChEM (Collaborative Innovation Center of Chemistry for Energy Materials), College of Chemistry and Chemical Engineering, Xiamen University, Xiamen, Fujian, 361005, P. R. China
| | - Pei-Qiang Huang
- Department of Chemistry, Fujian Provincial Key Laboratory of Chemical Biology, iChEM (Collaborative Innovation Center of Chemistry for Energy Materials), College of Chemistry and Chemical Engineering, Xiamen University, Xiamen, Fujian, 361005, P. R. China.,State Key Laboratory of Elemento-Organic Chemistry, Nankai University, Tianjin, 300071, P. R. China
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21
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Smith KB, Huang Y, Brown MK. Copper-Catalyzed Heteroarylboration of 1,3- Dienes with 3-Bromopyridines: A cine Substitution. Angew Chem Int Ed Engl 2018; 57:6146-6149. [PMID: 29697174 PMCID: PMC6132256 DOI: 10.1002/anie.201801139] [Citation(s) in RCA: 66] [Impact Index Per Article: 11.0] [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: 01/27/2018] [Revised: 03/10/2018] [Indexed: 01/23/2023]
Abstract
A method for the heteroarylboration of 1,3-dienes is presented. The process involves an unusual cine substitution of 3-bromopyridine derivatives to deliver highly functionalized heterocyclic products. Mechanistic studies are included that clarify the details of this unusual process.
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Affiliation(s)
- Kevin B. Smith
- Department of Chemistry, Indiana University, 800 E. Kirkwood Ave., Bloomington, IN 47401 (USA)
| | - Yuan Huang
- Department of Chemistry, Indiana University, 800 E. Kirkwood Ave., Bloomington, IN 47401 (USA)
| | - M. Kevin Brown
- Department of Chemistry, Indiana University, 800 E. Kirkwood Ave., Bloomington, IN 47401 (USA)
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22
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Fu C, Lora N, Kirchhoefer PL, Lee DR, Altenhofer E, Barnes CL, Hungerford NL, Krenske EH, Harmata M. (4+3) Cycloaddition Reactions of N-Alkyl Oxidopyridinium Ions. Angew Chem Int Ed Engl 2017; 56:14682-14687. [PMID: 28929559 DOI: 10.1002/anie.201708320] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.9] [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: 08/13/2017] [Indexed: 11/07/2022]
Abstract
N-Methylation of methyl 5-hydroxynicotinate followed by reaction with a diene in the presence of triethylamine afforded (4+3) cycloadducts in good to excellent yields. High regioselectivity was observed with 1-substituted and 1,2-disubstituted butadienes. Density functional theory calculations indicate that the cycloaddition involves concerted addition of the diene onto the oxidopyridinium ion. The process provides rapid access to bicyclic nitrogenous structures resembling natural alkaloids.
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Affiliation(s)
- Chencheng Fu
- Department of Chemistry, University of Missouri-Columbia, Columbia, MO, 65211, USA
| | - Nestor Lora
- Department of Chemistry, University of Missouri-Columbia, Columbia, MO, 65211, USA
| | | | - Dong Reyoul Lee
- Department of Chemistry, University of Missouri-Columbia, Columbia, MO, 65211, USA
| | - Erich Altenhofer
- Department of Chemistry, University of Missouri-Columbia, Columbia, MO, 65211, USA
| | - Charles L Barnes
- Department of Chemistry, University of Missouri-Columbia, Columbia, MO, 65211, USA
| | - Natasha L Hungerford
- School of Chemistry and Molecular Biosciences, The University of Queensland, Brisbane, QLD, 4072, Australia
| | - Elizabeth H Krenske
- School of Chemistry and Molecular Biosciences, The University of Queensland, Brisbane, QLD, 4072, Australia
| | - Michael Harmata
- Department of Chemistry, University of Missouri-Columbia, Columbia, MO, 65211, USA
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23
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Kularatne RN, Yang A, Nguyen HQ, McCandless GT, Stefan MC. Neodymium Catalyst for the Polymerization of Dienes and Polar Vinyl Monomers. Macromol Rapid Commun 2017; 38. [PMID: 28833897 DOI: 10.1002/marc.201700427] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [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: 06/23/2017] [Revised: 07/21/2017] [Indexed: 11/10/2022]
Abstract
Ziegler-Natta catalysts have played a major role in industry for the polymerization of dienes and vinyl monomers. However, due to the deactivation of the catalyst, this system fails to polymerize polar vinyl monomers such as vinyl acetate, methyl methacrylate, and methyl acrylate. Herein, a catalytic system composed of NdCl3 ⋅3TEP/TIBA is reported, which promotes a quasi-living polymerization of dienes and is also active for the homopolymerization of polar vinyl monomers. Additionally, this catalytic system generates polymyrcene-b-polyisoprene and poly(myrcene)-b-poly(methyl methacrylate) diblock copolymers by sequential monomer addition. To encourage the replacement of petroleum-based polymers by environmentally benign biobased polymers, polymerization of β-myrcene is demonstrated with a catalytic activity of ≈106 kg polymer mol Nd-1 h-1 .
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Affiliation(s)
- Ruvanthi N Kularatne
- Department of Chemistry and Biochemistry, University of Texas at Dallas, Richardson, TX, 75080, USA
| | - Annie Yang
- Department of Chemistry and Biochemistry, University of Texas at Dallas, Richardson, TX, 75080, USA
| | - Hien Q Nguyen
- Department of Chemistry and Biochemistry, University of Texas at Dallas, Richardson, TX, 75080, USA
| | - Gregory T McCandless
- Department of Chemistry and Biochemistry, University of Texas at Dallas, Richardson, TX, 75080, USA
| | - Mihaela C Stefan
- Department of Chemistry and Biochemistry, University of Texas at Dallas, Richardson, TX, 75080, USA
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24
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Mata S, González MJ, González J, López LA, Vicente R. Zinc-Catalyzed Synthesis of Conjugated Dienoates through Unusual Cross-Couplings of Zinc Carbenes with Diazo Compounds. Chemistry 2016; 23:1013-1017. [PMID: 27902878 DOI: 10.1002/chem.201604194] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.1] [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: 09/05/2016] [Indexed: 11/09/2022]
Abstract
Zinc-catalyzed selective cross-coupling of two carbene sources, such as vinyl diazo compounds and enynones, enabled the synthesis of conjugated dienoate derivatives. This reaction involved the unprecedented coupling of a zinc furyl carbene with vinyl diazo compounds through the γ-carbon. Alternatively, dienoates were also prepared by a commutative cross-coupling of zinc vinyl carbenes generated from cyclopropenes and simple diazo compounds.
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Affiliation(s)
- Sergio Mata
- Departamento de Química Orgánica e Inorgánica e Instituto Universitario de Química Organometálica "Enrique Moles", Universidad de Oviedo, c/ Julián Clavería 8, 33007, Oviedo, Spain
| | - María J González
- Departamento de Química Orgánica e Inorgánica e Instituto Universitario de Química Organometálica "Enrique Moles", Universidad de Oviedo, c/ Julián Clavería 8, 33007, Oviedo, Spain
| | - Jesús González
- Departamento de Química Orgánica e Inorgánica e Instituto Universitario de Química Organometálica "Enrique Moles", Universidad de Oviedo, c/ Julián Clavería 8, 33007, Oviedo, Spain
| | - Luis A López
- Departamento de Química Orgánica e Inorgánica e Instituto Universitario de Química Organometálica "Enrique Moles", Universidad de Oviedo, c/ Julián Clavería 8, 33007, Oviedo, Spain
| | - Rubén Vicente
- Departamento de Química Orgánica e Inorgánica e Instituto Universitario de Química Organometálica "Enrique Moles", Universidad de Oviedo, c/ Julián Clavería 8, 33007, Oviedo, Spain
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25
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Raya B, Biswas S, RajanBabu TV. Selective Cobalt-Catalyzed Reduction of Terminal Alkenes and Alkynes Using (EtO) 2Si(Me)H as a Stoichiometric Reductant. ACS Catal 2016; 6:6318-6323. [PMID: 28078166 DOI: 10.1021/acscatal.6b02272] [Citation(s) in RCA: 50] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
While attempting to effect Co-catalyzed hydrosilylation of β-vinyl trimethylsilyl enol ethers we discovered that depending on the silane, solvent and the method of generation of the reduced cobalt catalyst, a highly efficient and selective reduction or hydrosilylation of an alkene can be achieved. This paper deals with this reduction reaction, which has not been reported before in spite of the huge research activity in this area. The reaction, which uses an air-stable [2,6-di(aryliminoyl)pyridine)]CoCl2 activated by 2 equivalents of NaEt3BH as a catalyst (0.001-0.05 equiv) and (EtO)2SiMeH as the hydrogen source, is best run at ambient temperature in toluene and is highly selective for the reduction of simple unsubstituted 1-alkenes and the terminal double bonds in 1,3- and 1,4-dienes, β-vinyl ketones and silyloxy dienes. The reaction is tolerant of various functional groups such as a bromide, alcohol, amine, carbonyl, and di or trisubstituted double bonds, and water. Highly selective reduction of a terminal alkyne to either an alkene or alkane can be accomplished by using stoichiometric amounts of the silane. Preliminary mechanistic studies indicate that the reaction is stoichiometric in the silane and both hydrogens in the product come from the silane.
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Affiliation(s)
- Balaram Raya
- Department of Chemistry and
Biochemistry, 100 West
18th Avenue, The Ohio State University, Columbus, Ohio 43210, United States
| | - Souvagya Biswas
- Department of Chemistry and
Biochemistry, 100 West
18th Avenue, The Ohio State University, Columbus, Ohio 43210, United States
| | - T. V. RajanBabu
- Department of Chemistry and
Biochemistry, 100 West
18th Avenue, The Ohio State University, Columbus, Ohio 43210, United States
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26
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Trost BM, Koester DC, Sharif EU. Ruthenium-Catalyzed Multicomponent Reactions: Access to α-Silyl-β-Hydroxy Vinylsilanes, Stereodefined 1,3- Dienes, and Cyclohexenes. Chemistry 2016; 22:2634-8. [PMID: 26669265 DOI: 10.1002/chem.201504981] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [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: 12/11/2015] [Indexed: 11/07/2022]
Abstract
The synthesis of densly functionized α-silyl-β-hydroxyl vinylsilanes via ruthenium-catalyzed multicomponent reaction (MCR) is reported herein. Exceptionally high regio- and diastereoselectivity was achieved by employing an unprecedented hydrosilylation of bifunctional silyl-propargyl boronates. The simple protocol, mild reaction conditions, and unique tolerability of this method make it a valuable tool for the synthesis of highly elaborated building blocks. The one-pot synthesis of stereodefined olefins, the generation of a valuable cyclohexene building block through a four-component MCR, and further functionalization in an abundance of diastereoselective reactions is disclosed herein.
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Affiliation(s)
- Barry M Trost
- Department of Chemistry, Stanford University, Stanford, California, 94305-5080, USA.
| | - Dennis C Koester
- Department of Chemistry, Stanford University, Stanford, California, 94305-5080, USA
| | - Ehesan U Sharif
- Department of Chemistry, Stanford University, Stanford, California, 94305-5080, USA
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27
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Golovanov AA, Vologzhanina AV, Odin IS, Tret'yakova TP, Naumov SV. Crystal structure of (2E,4E)-5-[bis-(2-hy-droxy-eth-yl)amino]-1-(4-chloro-phen-yl)-5-phenyl-penta-2,4-dien-1-one. Acta Crystallogr E Crystallogr Commun 2015; 71:o870-1. [PMID: 26594571 PMCID: PMC4645000 DOI: 10.1107/s2056989015019568] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/09/2015] [Accepted: 10/15/2015] [Indexed: 11/10/2022]
Abstract
In the title compound, C21H22ClNO3, the penta-diene unit is nearly planar [maximum deviation = 0.023 (1) Å], but the carbonyl O atom deviates significantly [by 0.304 (1) Å] from its mean plane, which is twisted with respect to the phenyl and chloro-benzene rings by 71.34 (13) and 46.40 (13)°, respectively. In the crystal, inversion-related molecules are linked by two pairs of O-H⋯O hydrogen bonds, forming chains propagating along [01-1], enclosing R (2) 2(16) and R (2) 2(22) ring motifs. The chains are linked via C-H⋯O hydrogen bonds and C-H⋯π inter-actions into a three-dimensional supra-molecular architecture.
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Affiliation(s)
- Alexander A Golovanov
- Department of Chemistry, Chemical Processes and Techologies, Togliatti State University, 445667 Togliatti, Russian Federation
| | - Anna V Vologzhanina
- Nesmeyanov Institute of Organoelement Compounds of the Russian Academy of Sciences, 119991 Moscow, Russian Federation
| | - Ivan S Odin
- Department of Chemistry, Chemical Processes and Techologies, Togliatti State University, 445667 Togliatti, Russian Federation
| | - Tat'yana P Tret'yakova
- The Laboratory of Functional Heterocyclic Compounds, Togliatti State University, 445667 Togliatti, Russian Federation
| | - Sergey V Naumov
- The Laboratory of Functional Heterocyclic Compounds, Togliatti State University, 445667 Togliatti, Russian Federation
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28
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Kotha S, Chavan AS, Goyal D. Diversity-Oriented Approaches to Polycyclics and Bioinspired Molecules via the Diels-Alder Strategy: Green Chemistry, Synthetic Economy, and Beyond. ACS Comb Sci 2015; 17:253-302. [PMID: 25875156 DOI: 10.1021/co500146u] [Citation(s) in RCA: 57] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
We describe diverse approaches to various dienes and their utilization in the Diels-Alder reaction to produce a variety of polycycles. The dienes covered here are prepared by simple alkylation reaction or via the Claisen rearrangement or by enyne metathesis of alkyne or enyne building blocks. Here, we have also included the Diels-Alder chemistry of dendralenes, a higher analog of cross-conjugated dienes. The present article is inclusive of o-xylylene derivatives that are generated in situ starting with benzosultine or benzosulfone derivatives. The Diels-Alder reaction of these dienes with various dienophiles gave diverse polycyclic systems and biologically important targets.
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Affiliation(s)
- Sambasivarao Kotha
- Department of Chemistry, Indian Institute of Technology Bombay, Powai, Mumbai 400 076 India
| | - Arjun S. Chavan
- Department of Chemistry, Indian Institute of Technology Bombay, Powai, Mumbai 400 076 India
| | - Deepti Goyal
- Department of Chemistry, Indian Institute of Technology Bombay, Powai, Mumbai 400 076 India
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Foster RW, Benhamou L, Porter MJ, Bučar DK, Hailes HC, Tame CJ, Sheppard TD. Irreversible endo-selective diels-alder reactions of substituted alkoxyfurans: a general synthesis of endo-cantharimides. Chemistry 2015; 21:6107-14. [PMID: 25756502 PMCID: PMC4406157 DOI: 10.1002/chem.201406286] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.9] [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: 11/29/2014] [Indexed: 11/29/2022]
Abstract
The [4+2] cycloaddition of 3-alkoxyfurans with N-substituted maleimides provides the first general route for preparing endo-cantharimides. Unlike the corresponding reaction with 3H furans, the reaction can tolerate a broad range of 2-substitued furans including alkyl, aromatic, and heteroaromatic groups. The cycloaddition products were converted into a range of cantharimide products with promising lead-like properties for medicinal chemistry programs. Furthermore, the electron-rich furans are shown to react with a variety of alternative dienophiles to generate 7-oxabicyclo[2.2.1]heptane derivatives under mild conditions. DFT calculations have been performed to rationalize the activation effect of the 3-alkoxy group on a furan Diels-Alder reaction.
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Affiliation(s)
- Robert W Foster
- Department of Chemistry, University College London, Christopher Ingold Laboratories20 Gordon Street, London, WC1H 0AJ (UK)
| | - Laure Benhamou
- Department of Chemistry, University College London, Christopher Ingold Laboratories20 Gordon Street, London, WC1H 0AJ (UK)
| | - Michael J Porter
- Department of Chemistry, University College London, Christopher Ingold Laboratories20 Gordon Street, London, WC1H 0AJ (UK)
| | - Dejan-Krešimir Bučar
- Department of Chemistry, University College London, Christopher Ingold Laboratories20 Gordon Street, London, WC1H 0AJ (UK)
| | - Helen C Hailes
- Department of Chemistry, University College London, Christopher Ingold Laboratories20 Gordon Street, London, WC1H 0AJ (UK)
| | - Christopher J Tame
- GlaxoSmithKline, Medicines Research CentreGunnels Wood Road, Stevenage, Herts, SG1 2NY (UK)
| | - Tom D Sheppard
- Department of Chemistry, University College London, Christopher Ingold Laboratories20 Gordon Street, London, WC1H 0AJ (UK)
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Abstract
Diels-Alder reactions of five-membered heterocycles containing one heteroatom with an N-arylmaleimide were studied. Cycloaddition of 2,5-dimethylfuran (4) with 2-(4-methylphenyl)maleimide (3) in toluene at 60 °C gave bicyclic adduct 5. Cycloadditions of 3 with 2,5-dimethylthiophene (11) and 1,2,5-trimethylpyrrole (14) were also studied. Interestingly, the bicyclic compound 5 cleanly rearranged, with loss of water, when treated with p-toluenesulfonic acid in toluene at 80 °C to give 4,7-dimethyl-2-p-tolylisoindoline-1,3-dione (6).
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Affiliation(s)
- Xiaoyuan Ding
- Department of Chemistry, Microbiotix, Inc., One Innovation Drive, Worcester, MA 01605 USA
| | - Son T. Nguyen
- Department of Chemistry, Microbiotix, Inc., One Innovation Drive, Worcester, MA 01605 USA
| | - John D. Williams
- Department of Chemistry, Microbiotix, Inc., One Innovation Drive, Worcester, MA 01605 USA
| | - Norton P. Peet
- Department of Chemistry, Microbiotix, Inc., One Innovation Drive, Worcester, MA 01605 USA
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Sarbu LG, Hopf H, Jones PG, Birsa LM. Selenium halide-induced bridge formation in [2.2]paracyclophanes. Beilstein J Org Chem 2014; 10:2550-5. [PMID: 25383126 PMCID: PMC4222412 DOI: 10.3762/bjoc.10.266] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [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: 07/12/2014] [Accepted: 10/17/2014] [Indexed: 11/23/2022] Open
Abstract
An addition/elimination sequence of selenium halides to pseudo-geminally bis(acetylene) substituted [2.2]paracyclophanes leads to new bridges with an endo-exo-diene substructure. The reactions have been found to be sensitive to the substitution of the ethynyl group. The formation of dienes with a zig-zag configuration is related to that observed for non-conjugated cyclic diynes of medium ring size.
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Affiliation(s)
- Laura G Sarbu
- Department of Chemistry,"Al. I. Cuza" University of Iasi, 11 Carol I Bv., RO-700506 Iasi, Romania
| | - Henning Hopf
- Institute of Organic Chemistry, Technical University of Braunschweig, Hagenring 30, D-38106 Braunschweig, Germany
| | - Peter G Jones
- Institute of Inorganic and Analytical Chemistry, Technical University of Braunschweig, Hagenring 30, D-38106 Braunschweig, Germany
| | - Lucian M Birsa
- Department of Chemistry,"Al. I. Cuza" University of Iasi, 11 Carol I Bv., RO-700506 Iasi, Romania ; Institute of Organic Chemistry, Technical University of Braunschweig, Hagenring 30, D-38106 Braunschweig, Germany
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Schmidt B, Kunz O. Bidirectional cross metathesis and ring-closing metathesis/ring opening of a C 2-symmetric building block: a strategy for the synthesis of decanolide natural products. Beilstein J Org Chem 2013; 9:2544-55. [PMID: 24367418 PMCID: PMC3869341 DOI: 10.3762/bjoc.9.289] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.2] [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: 08/14/2013] [Accepted: 10/29/2013] [Indexed: 11/23/2022] Open
Abstract
Starting from the conveniently available ex-chiral pool building block (R,R)-hexa-1,5-diene-3,4-diol, the ten-membered ring lactones stagonolide E and curvulide A were synthesized using a bidirectional olefin-metathesis functionalization of the terminal double bonds. Key steps are (i) a site-selective cross metathesis, (ii) a highly diastereoselective extended tethered RCM to furnish a (Z,E)-configured dienyl carboxylic acid and (iii) a Ru-lipase-catalyzed dynamic kinetic resolution to establish the desired configuration at C9. Ring closure was accomplished by macrolactonization. Curvulide A was synthesized from stagonolide E through Sharpless epoxidation.
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Affiliation(s)
- Bernd Schmidt
- Institut für Chemie, Organische Synthesechemie, Universität Potsdam, Karl-Liebknecht-Straße 24-25, 14476 Potsdam-Golm, Germany
| | - Oliver Kunz
- Institut für Chemie, Organische Synthesechemie, Universität Potsdam, Karl-Liebknecht-Straße 24-25, 14476 Potsdam-Golm, Germany
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Abstract
Herein, by using dispersion-corrected density functional theory, we investigated the Diels-Alder chemistry of pristine and defective graphene. Three dienes were considered, namely 2,3-dimethoxy-1,3-butadiene (DMBD), 9-methylanthracene (9MA), and 9,10-dimethylanthracene (910DMA). The dienophiles that were assayed were tetracyanoethylene (TCNE) and maleic anhydride (MA). When pristine graphene acted as the dienophile, we found that the cycloaddition products were 47-63 kcal mol(-1) less stable than the reactants, thus making the reaction very difficult. The presence of Stone-Wales translocations, 585 double vacancies, or 555-777 reconstructed double vacancies did not significantly improve the reactivity because the cycloaddition products were still located at higher energy than the reactants. However, for the addition of 910DMA to single vacancies, the product showed comparable stability to the separated reactants, whereas for unsaturated armchair edges the reaction was extremely favorable. With regards the reactions with dienophiles, for TCNE, the cycloaddition product was metastable. In the case of MA, we observed a reaction product that was less stable than the reactants by 50 kcal mol(-1) . For the reactions between graphene as a diene and the dienophiles, we found that the most-promising defects were single vacancies and unsaturated armchair edges, because the other three defects were much-less reactive. Thus, we conclude that the reactions with these above-mentioned dienes may proceed on pristine or defective sheets with heating, despite being endergonic. The same statement also applies to the dienophile maleic anhydride. However, for TCNE, the reaction is only likely to occur onto single vacancies or unsaturated armchair edges. We conclude that the dienophile character of graphene is slightly stronger than its behavior as a diene.
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Affiliation(s)
- Pablo A Denis
- Computational Nanotechnology DETEMA, Facultad de Química, UDELAR, CC 1157, 11800 Montevideo (Uruguay), Fax: (+589) 229241906.
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Kishore J. Isolation, identification & characterization of Proteus penneri--a missed rare pathogen. Indian J Med Res 2012; 135:341-5. [PMID: 22561620] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022] Open
Abstract
BACKGROUND & OBJECTIVES Indole negative Proteus species are invariably incorrectly identified as P. mirabilis, missing isolates of Proteus penneri. P. penneri is an invasive pathogen capable of causing major infectious diseases still seldom reported in individual cases. We report here the isolation, differentiation, characterization and typing of P. penneri from patients with different clinical infections. METHODS Urine, pus and body fluids collected from patients in intensive care units, wards and out patients departments of a tertiary health care institute from north India were cultured. A total of 61 indole negative Proteus isolates were subjected to extended biochemical tests to differentiate and identify P. penneri from P. mirabilis including failure to produce ornithine decarboxylase (by 0% strains of P. penneri and 100% strains of P. mirabilis) besides P. penneri being uniformly salicin negative, non-utilizer of citrate but ferments sucrose and maltose. Antibiograms and Dienes phenomenon were performed to characterize and type P. penneri isolates besides screening for β-lactamase production. RESULTS Eight isolates of P. penneri were identified; four from urine, three from abdominal drain-fluid and one from diabetic foot ulcer. P. penneri was isolated as the sole pathogen in all patients having underlying disease; post-operatively. Swarming was not seen in the first strain on primary isolation and was poor in strain-4. All eight isolates were biochemically homologous but multi-drug resistant (MDR) with resistance to 6-8 drugs (up to 12). β-lactamase production was seen in three of five isolates while Dienes phenomenon found four distinct types and discriminated strains differing in resistance even with a single drug. INTERPRETATION & CONCLUSIONS A few additional biochemical tests identified P. penneri isolates; it infected patients with underlying disease and strains were MDR and heterogenous.
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Affiliation(s)
- Yuhei Yamamoto
- Department of Chemistry, The University of Chicago, 5735 South Ellis Avenue, Chicago, IL 60637 (USA), Fax: (+ 1)773-702-0805, E-mail:
| | - Hisashi Yamamoto
- Department of Chemistry, The University of Chicago, 5735 South Ellis Avenue, Chicago, IL 60637 (USA), Fax: (+ 1)773-702-0805, E-mail:
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