1
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Riegel GF, Payne C, Kass SR. Effects of Brønsted acid cocatalysts on the activities and selectivities of charge‐enhanced thiourea organocatalysts in Friedel–Crafts and oxa‐Pictet–Spengler reactions. J PHYS ORG CHEM 2022. [DOI: 10.1002/poc.4321] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Affiliation(s)
- George F. Riegel
- Department of Chemistry University of Minnesota Minneapolis Minnesota USA
| | - Curtis Payne
- Department of Chemistry University of Minnesota Minneapolis Minnesota USA
| | - Steven R. Kass
- Department of Chemistry University of Minnesota Minneapolis Minnesota USA
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2
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Zimmermann BM, Ngoc TT, Tzaras DI, Kaicharla T, Teichert JF. A Bifunctional Copper Catalyst Enables Ester Reduction with H 2: Expanding the Reactivity Space of Nucleophilic Copper Hydrides. J Am Chem Soc 2021; 143:16865-16873. [PMID: 34605649 DOI: 10.1021/jacs.1c09626] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Employing a bifunctional catalyst based on a copper(I)/NHC complex and a guanidine organocatalyst, catalytic ester reductions to alcohols with H2 as terminal reducing agent are facilitated. The approach taken here enables the simultaneous activation of esters through hydrogen bonding and formation of nucleophilic copper(I) hydrides from H2, resulting in a catalytic hydride transfer to esters. The reduction step is further facilitated by a proton shuttle mediated by the guanidinium subunit. This bifunctional approach to ester reductions for the first time shifts the reactivity of generally considered "soft" copper(I) hydrides to previously unreactive "hard" ester electrophiles and paves the way for a replacement of stoichiometric reducing agents by a catalyst and H2.
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Affiliation(s)
- Birte M Zimmermann
- Institut für Chemie, Technische Universität Berlin, Straße des 17. Juni 115, 10623 Berlin, Germany
| | - Trung Tran Ngoc
- Institut für Chemie, Technische Universität Berlin, Straße des 17. Juni 115, 10623 Berlin, Germany.,Institut für Chemie, Technische Universität Chemnitz, Straße der Nationen 62, 09111 Chemnitz, Germany
| | - Dimitrios-Ioannis Tzaras
- Institut für Chemie, Technische Universität Berlin, Straße des 17. Juni 115, 10623 Berlin, Germany.,Institut für Chemie, Technische Universität Chemnitz, Straße der Nationen 62, 09111 Chemnitz, Germany
| | - Trinadh Kaicharla
- Institut für Chemie, Technische Universität Berlin, Straße des 17. Juni 115, 10623 Berlin, Germany
| | - Johannes F Teichert
- Institut für Chemie, Technische Universität Berlin, Straße des 17. Juni 115, 10623 Berlin, Germany.,Institut für Chemie, Technische Universität Chemnitz, Straße der Nationen 62, 09111 Chemnitz, Germany
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3
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Shiotani N, Wakabayashi T, Ogura Y, Sugimoto Y, Takikawa H. Studies on strigolactone BC-ring formation: Chemical conversion of an 18-hydroxycarlactonoate derivative into racemic 4-deoxyorobanchol/5-deoxystrigol via the acid-mediated cascade cyclization. Tetrahedron Lett 2021. [DOI: 10.1016/j.tetlet.2021.152922] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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4
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Design and synthesis of chiral urea-derived iodoarenes and their assessment in the enantioselective dearomatizing cyclization of a naphthyl amide. Tetrahedron 2020. [DOI: 10.1016/j.tet.2020.131634] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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5
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Jennings JJ, Wigman BW, Armstrong BM, Franz AK. NMR Quantification of the Effects of Ligands and Counterions on Lewis Acid Catalysis. J Org Chem 2019; 84:15845-15853. [PMID: 31747746 DOI: 10.1021/acs.joc.9b02107] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
The relative Lewis acidity of a variety of metal-ligand catalyst complexes is quantified using 31P NMR spectroscopy. Three 31P NMR probes, including two new bidentate binding probes, are compared on the basis of different binding modes (i.e., monodentate vs bidentate) and the relative scale of their downfield shift upon binding to Lewis acid complexes. Bidentate coordination of catalyst complexes including metal catalysts, ligands, and counterions were assessed due to their importance to asymmetric catalysis. The effect of ligands, counterions, and additives on Lewis acidity is quantified and correlated to reaction yield at an early time point as an approximation for catalytic activity/efficiency and chelation mode in two organic transformations. Binding studies were performed under catalytically relevant conditions, giving further applicability to synthesis. Insight into activation modes are revealed through this analysis.
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Affiliation(s)
- Julia J Jennings
- Department of Chemistry , University of California , One Shields Avenue , Davis , California 95616 , United States
| | - Benjamin W Wigman
- Department of Chemistry , University of California , One Shields Avenue , Davis , California 95616 , United States
| | - Brittany M Armstrong
- Department of Chemistry , University of California , One Shields Avenue , Davis , California 95616 , United States
| | - Annaliese K Franz
- Department of Chemistry , University of California , One Shields Avenue , Davis , California 95616 , United States
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6
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Gimeno MC, Herrera RP. Hydrogen Bonding and Internal or External Lewis or Brønsted Acid Assisted (Thio)urea Catalysts. European J Org Chem 2019. [DOI: 10.1002/ejoc.201901344] [Citation(s) in RCA: 23] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- M. Concepción Gimeno
- Departamento de Química Inorgánica; Instituto de Síntesis Química y Catálisis Homogénea (ISQCH) CSIC-Universidad de Zaragoza; C/ Pedro Cerbuna 12 50009 Zaragoza Spain
| | - Raquel P. Herrera
- Departamento de Química Orgánica. Laboratorio de Organocatálisis Asimétrica; Instituto de Síntesis Química y Catálisis Homogénea (ISQCH) CSIC-Universidad de Zaragoza; C/ Pedro Cerbuna 12 50009 Zaragoza Spain
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7
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Maximuck WJ, Gladysz JA. Lipophilic chiral cobalt (III) complexes of hexaamine ligands: Efficacies as enantioselective hydrogen bond donor catalysts. MOLECULAR CATALYSIS 2019. [DOI: 10.1016/j.mcat.2019.03.018] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
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8
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Zhu G, Shi W, Gao H, Zhou Z, Song H, Yi W. Chemodivergent Couplings of N-Arylureas and Methyleneoxetanones via Rh(III)-Catalyzed and Solvent-Controlled C–H Activation. Org Lett 2019; 21:4143-4147. [PMID: 31124685 DOI: 10.1021/acs.orglett.9b01333] [Citation(s) in RCA: 22] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Guoxun Zhu
- School of Chemical Engineering and Technology, Sun Yat-sen University, Guangzhou, Guangdong 510275, China
| | - Wendi Shi
- School of Chemical Engineering and Technology, Sun Yat-sen University, Guangzhou, Guangdong 510275, China
- Key Laboratory of Molecular Target & Clinical Pharmacology and State Key Laboratory of Respiratory Disease, School of Pharmaceutical Sciences & the Fifth Affiliated Hospital, Guangzhou Medical University, Guangzhou, Guangdong 511436, China
| | - Hui Gao
- Key Laboratory of Molecular Target & Clinical Pharmacology and State Key Laboratory of Respiratory Disease, School of Pharmaceutical Sciences & the Fifth Affiliated Hospital, Guangzhou Medical University, Guangzhou, Guangdong 511436, China
| | - Zhi Zhou
- Key Laboratory of Molecular Target & Clinical Pharmacology and State Key Laboratory of Respiratory Disease, School of Pharmaceutical Sciences & the Fifth Affiliated Hospital, Guangzhou Medical University, Guangzhou, Guangdong 511436, China
| | - Huacan Song
- School of Chemical Engineering and Technology, Sun Yat-sen University, Guangzhou, Guangdong 510275, China
| | - Wei Yi
- Key Laboratory of Molecular Target & Clinical Pharmacology and State Key Laboratory of Respiratory Disease, School of Pharmaceutical Sciences & the Fifth Affiliated Hospital, Guangzhou Medical University, Guangzhou, Guangdong 511436, China
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9
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Jin C, Yan Z, Sun B, Yang J. Visible-Light-Induced Regioselective Alkylation of Coumarins via Decarboxylative Coupling with N-Hydroxyphthalimide Esters. Org Lett 2019; 21:2064-2068. [DOI: 10.1021/acs.orglett.9b00327] [Citation(s) in RCA: 65] [Impact Index Per Article: 13.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
Affiliation(s)
- Can Jin
- College of Pharmaceutical Sciences, Zhejiang University of Technology, Hangzhou 310014, P. R. China
| | - Zhiyang Yan
- College of Pharmaceutical Sciences, Zhejiang University of Technology, Hangzhou 310014, P. R. China
| | - Bin Sun
- Collaborative Innovation Center of Yangtze River Delta Region Green Pharmaceuticals, Zhejiang University of Technology, Hangzhou 310014, P. R. China
| | - Jin Yang
- College of Pharmaceutical Sciences, Zhejiang University of Technology, Hangzhou 310014, P. R. China
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10
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Storozhenko OA, Festa AA, Bella Ndoutoume DR, Aksenov AV, Varlamov AV, Voskressensky LG. Mn-mediated sequential three-component domino Knoevenagel/cyclization/Michael addition/oxidative cyclization reaction towards annulated imidazo[1,2- a]pyridines. Beilstein J Org Chem 2019; 14:3078-3087. [PMID: 30643585 PMCID: PMC6317425 DOI: 10.3762/bjoc.14.287] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/05/2018] [Accepted: 11/26/2018] [Indexed: 12/14/2022] Open
Abstract
The sequential three-component reaction between o-hydroxybenzaldehydes, N-(cyanomethyl)pyridinium salts and a nucleophile towards substituted chromenoimidazopyridines under oxidative conditions has been developed. The employment of Mn(OAc)3·2H2O or KMnO4 as stoichiometric oxidants allowed the use of a wide range of nucleophiles, such as nitromethane, (aza)indoles, pyrroles, phenols, pyrazole, indazole and diethyl malonate. The formation of the target compounds presumably proceeds through a domino Knoevenagel/cyclization/Michael addition/oxidative cyclization reaction sequence.
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Affiliation(s)
- Olga A Storozhenko
- Organic Chemistry Department, Peoples' Friendship University of Russia (RUDN University), Miklukho-Maklaya st. 6, 117198 Moscow, Russian Federation
| | - Alexey A Festa
- Organic Chemistry Department, Peoples' Friendship University of Russia (RUDN University), Miklukho-Maklaya st. 6, 117198 Moscow, Russian Federation
| | - Delphine R Bella Ndoutoume
- Organic Chemistry Department, Peoples' Friendship University of Russia (RUDN University), Miklukho-Maklaya st. 6, 117198 Moscow, Russian Federation
| | - Alexander V Aksenov
- Department of Chemistry, North Caucasus Federal University, Pushkin st. 1a, 355009 Stavropol, Russian Federation
| | - Alexey V Varlamov
- Organic Chemistry Department, Peoples' Friendship University of Russia (RUDN University), Miklukho-Maklaya st. 6, 117198 Moscow, Russian Federation
| | - Leonid G Voskressensky
- Organic Chemistry Department, Peoples' Friendship University of Russia (RUDN University), Miklukho-Maklaya st. 6, 117198 Moscow, Russian Federation
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11
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Novikov RA, Denisov DA, Potapov KV, Tkachev YV, Shulishov EV, Tomilov YV. Ionic Ga-Complexes of Alkylidene- and Arylmethylidenemalonates and Their Reactions with Acetylenes: An In-Depth Look into the Mechanism of the Occurring Gallium Chemistry. J Am Chem Soc 2018; 140:14381-14390. [DOI: 10.1021/jacs.8b08913] [Citation(s) in RCA: 36] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Affiliation(s)
- Roman A. Novikov
- N. D. Zelinsky Institute of Organic Chemistry, Russian Academy of Sciences, 47 Leninsky Prospekt, 119991 Moscow, Russian Federation
- Engelhardt Institute of Molecular Biology, Russian Academy of Sciences, 32 Vavilov Street, 119991 Moscow, Russian Federation
| | - Dmitry A. Denisov
- N. D. Zelinsky Institute of Organic Chemistry, Russian Academy of Sciences, 47 Leninsky Prospekt, 119991 Moscow, Russian Federation
| | - Konstantin V. Potapov
- N. D. Zelinsky Institute of Organic Chemistry, Russian Academy of Sciences, 47 Leninsky Prospekt, 119991 Moscow, Russian Federation
| | - Yaroslav V. Tkachev
- Engelhardt Institute of Molecular Biology, Russian Academy of Sciences, 32 Vavilov Street, 119991 Moscow, Russian Federation
| | - Evgeny V. Shulishov
- N. D. Zelinsky Institute of Organic Chemistry, Russian Academy of Sciences, 47 Leninsky Prospekt, 119991 Moscow, Russian Federation
| | - Yury V. Tomilov
- N. D. Zelinsky Institute of Organic Chemistry, Russian Academy of Sciences, 47 Leninsky Prospekt, 119991 Moscow, Russian Federation
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12
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Izaga A, Herrera RP, Gimeno MC. Gold(I)-Mediated Thiourea Organocatalyst Activation: A Synergic Effect for Asymmetric Catalysis. ChemCatChem 2017; 9:1313-1321. [PMID: 28706568 PMCID: PMC5485003 DOI: 10.1002/cctc.201601527] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/28/2016] [Revised: 01/12/2017] [Indexed: 11/06/2022]
Abstract
Several group 11 metal complexes with chiral thiourea organocatalysts have been prepared and tested as organocatalysts. The promising results on the influence of metal-assisted thiourea organocatalysts in the asymmetric Friedel-Crafts alkylation of indole with nitrostyrene are described. Better results with the metal complexes have been achieved because of the cooperative effects between the chiral thiourea and the metal. The synergic effect between both species is higher than the effect promoted by each one separately, especially for gold(I). These outcomes are attributed to a pioneering gold(I) activation of the thiourea catalysts, affording a more acidic and rigid catalytic complex than that provided by the thiourea alone. Furthermore, the use of the gold-thiourea organocatalyst allows reducing the catalyst loading to 1-3 mol %. This contribution could become an important starting point for further investigations opening a new line of research overlooked so far in the literature.
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Affiliation(s)
- Anabel Izaga
- Departamento de Química Inorgánica, Instituto de Síntesis Química y Catálisis Homogénea (ISQCH)CSIC-Universidad de ZaragozaC/ Pedro Cerbuna, No. 12E-50009ZaragozaSpain
| | - Raquel P. Herrera
- Departamento de Química Orgánica. Laboratorio de Organocatálisis, Asimétrica, Instituto de Síntesis Química y Catálisis Homogénea (ISQCH)CSIC-Universidad de ZaragozaC/ Pedro Cerbuna, No. 12E-50009ZaragozaSpain
| | - M. Concepción Gimeno
- Departamento de Química Inorgánica, Instituto de Síntesis Química y Catálisis Homogénea (ISQCH)CSIC-Universidad de ZaragozaC/ Pedro Cerbuna, No. 12E-50009ZaragozaSpain
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13
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Jiménez EI, Vallejo Narváez WE, Román-Chavarría CA, Vazquez-Chavez J, Rocha-Rinza T, Hernández-Rodríguez M. Bifunctional Thioureas with α-Trifluoromethyl or Methyl Groups: Comparison of Catalytic Performance in Michael Additions. J Org Chem 2016; 81:7419-7431. [PMID: 27400400 DOI: 10.1021/acs.joc.6b01063] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
Thioureas are an important scaffold in organocatalysis because of their ability to form hydrogen bonds that activate substrates and fix them in a defined position, which allows a given reaction to occur. Structures that enhance the acidity of the thiourea are usually used to increase the hydrogen-bonding properties, such as 3,5-bis(trifluoromethyl)phenyl and boronate ureas. Herein, we report the synthesis of bifunctional thioureas with a chiral moiety that include either a trifluoromethyl or methyl group. Their catalytic performance in representative Michael addition reactions was used in an effort to compare the electronic effects of the fluorination at the methyl group. The observed differences concerning yields and ee values cannot be attributed solely to the different steric environments; theoretical results indicate distinct interactions within the corresponding transition states. The calculated transition states show that the fluorinated catalysts have stronger N-H···O and C-H···F hydrogen bonds, while the nonfluorinated systems have C-H···π contacts. These results have shown that a variety of hydrogen-bonding interactions are important in determining the yield and selectivity of thiourea organocatalysis. These details can be further exploited in catalyst design.
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Affiliation(s)
- Eddy I Jiménez
- Institute of Chemistry, National Autonomous University of Mexico , Circuito Exterior, Ciudad Universitaria, Del. Coyoacán, 04510 Cd. Mx., Mexico
| | - Wilmer E Vallejo Narváez
- Institute of Chemistry, National Autonomous University of Mexico , Circuito Exterior, Ciudad Universitaria, Del. Coyoacán, 04510 Cd. Mx., Mexico
| | - Carlos A Román-Chavarría
- Institute of Chemistry, National Autonomous University of Mexico , Circuito Exterior, Ciudad Universitaria, Del. Coyoacán, 04510 Cd. Mx., Mexico
| | - Josue Vazquez-Chavez
- Institute of Chemistry, National Autonomous University of Mexico , Circuito Exterior, Ciudad Universitaria, Del. Coyoacán, 04510 Cd. Mx., Mexico
| | - Tomás Rocha-Rinza
- Institute of Chemistry, National Autonomous University of Mexico , Circuito Exterior, Ciudad Universitaria, Del. Coyoacán, 04510 Cd. Mx., Mexico
| | - Marcos Hernández-Rodríguez
- Institute of Chemistry, National Autonomous University of Mexico , Circuito Exterior, Ciudad Universitaria, Del. Coyoacán, 04510 Cd. Mx., Mexico
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14
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Jennings JJ, Bhatt CP, Franz AK. Lanthanum(III)-Catalyzed Three-Component Reaction of Coumarin-3-carboxylates for the Synthesis of Indolylmalonamides and Analysis of Their Photophysical Properties. J Org Chem 2016; 81:6211-22. [DOI: 10.1021/acs.joc.6b00541] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Julia J. Jennings
- Department of Chemistry, University of California, One Shields Avenue, Davis, California 95616, United States
| | - Chinmay P. Bhatt
- Department of Chemistry, University of California, One Shields Avenue, Davis, California 95616, United States
| | - Annaliese K. Franz
- Department of Chemistry, University of California, One Shields Avenue, Davis, California 95616, United States
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15
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Ghosh SK, Ganzmann C, Bhuvanesh N, Gladysz JA. Werner-Komplexe mit ω-Dimethylaminoalkyl-substitutierten Ethylendiaminliganden: bifunktionale H-Brückendonor-Katalysatoren für hoch enantioselektive Michael-Additionen. Angew Chem Int Ed Engl 2016. [DOI: 10.1002/ange.201511314] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Affiliation(s)
- Subrata K. Ghosh
- Department of Chemistry; Texas A&M University; PO Box 30012 College Station TX 77842-3012 USA
| | - Carola Ganzmann
- Institut für Organische Chemie und Interdisciplinary Center for Molecular Materials; Friedrich-Alexander-Universität Erlangen-Nürnberg; Henkestraße 42 91054 Erlangen Deutschland
| | - Nattamai Bhuvanesh
- Department of Chemistry; Texas A&M University; PO Box 30012 College Station TX 77842-3012 USA
| | - John A. Gladysz
- Department of Chemistry; Texas A&M University; PO Box 30012 College Station TX 77842-3012 USA
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16
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Ghosh SK, Ganzmann C, Bhuvanesh N, Gladysz JA. Werner Complexes with ω-Dimethylaminoalkyl Substituted Ethylenediamine Ligands: Bifunctional Hydrogen-Bond-Donor Catalysts for Highly Enantioselective Michael Additions. Angew Chem Int Ed Engl 2016; 55:4356-60. [PMID: 26918320 DOI: 10.1002/anie.201511314] [Citation(s) in RCA: 46] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/06/2015] [Revised: 01/02/2016] [Indexed: 01/02/2023]
Abstract
The racemic carbonate complex [Co(en)2 O2 CO](+) Cl(-) (en=1,2-ethylenediamine) and (S)-[H3 NCH((CH2 )n NHMe2 )CH2 NH3 ](3+) 3 Cl(-) (n=1-4) react (water, charcoal, 100 °C) to give [Co(en)2 ((S)-H2 NCH((CH2 )n NHMe2 )CH2 NH2 )](4+) 4 Cl(-) (3 a-d H(4+) 4 Cl(-) ) as a mixture of Λ/Δ diastereomers that separate on chiral-phase Sephadex columns. These are treated with NaOH/Na(+) BArf (-) (BArf =B(3,5-C6 H3 (CF3 )2 )4 ) to give lipophilic Λ- and Δ-3 a-d(3+) 3 BArf (-) , which are screened as catalysts (10 mol %) for additions of dialkyl malonates to nitroalkenes. Optimal results are obtained with Λ-3 c(3+) 3 BArf (-) (CH2 Cl2 , -35 °C; 98-82 % yields and 99-93 % ee for six β-arylnitroethenes). The monofunctional catalysts Λ- and Δ-[Co(en)3 ](3+) 3 BArf (-) give enantioselectivities of <10 % ee with equal loadings of Et3 N. The crystal structure of Δ-3 a H(4+) 4 Cl(-) provides a starting point for speculation regarding transition-state assemblies.
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Affiliation(s)
- Subrata K Ghosh
- Department of Chemistry, Texas A&M University, PO Box 30012, College Station, TX, 77842-3012, USA
| | - Carola Ganzmann
- Institut für Organische Chemie and Interdisciplinary Center for Molecular Materials, Friedrich-Alexander-Universität Erlangen-Nürnberg, Henkestrasse 42, 91054, Erlangen, Germany
| | - Nattamai Bhuvanesh
- Department of Chemistry, Texas A&M University, PO Box 30012, College Station, TX, 77842-3012, USA
| | - John A Gladysz
- Department of Chemistry, Texas A&M University, PO Box 30012, College Station, TX, 77842-3012, USA.
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17
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Kumar A, Ghosh SK, Gladysz JA. Tris(1,2-diphenylethylenediamine)cobalt(III) Complexes: Chiral Hydrogen Bond Donor Catalysts for Enantioselective α-Aminations of 1,3-Dicarbonyl Compounds. Org Lett 2016; 18:760-3. [PMID: 26820242 DOI: 10.1021/acs.orglett.6b00023] [Citation(s) in RCA: 51] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
The enantiopure salt Δ-[Co((S,S)-dpen)3](3+)2Cl(-)B(C6F5)4(-) is an effective hydrogen bond donor catalyst for additions of 1,3-dicarbonyl compounds to di-tert-butyl azodicarboxylate in the presence of N-methylmorpholine (1.0:1.0:0.10) in CH3CN at 0 °C, as illustrated with educts derived from five- or six-membered ring ketones (99-88% yields, >99-91% ee) and cycloheptanone (94%, 72% ee) as well as 2-cyanocyclopentanone (92%, 45% ee) and an acyclic system (98%, >99% ee).
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Affiliation(s)
- Anil Kumar
- Department of Chemistry, Texas A&M University , P.O. Box 30012, College Station, Texas 77842-3012, United States
| | - Subrata K Ghosh
- Department of Chemistry, Texas A&M University , P.O. Box 30012, College Station, Texas 77842-3012, United States
| | - John A Gladysz
- Department of Chemistry, Texas A&M University , P.O. Box 30012, College Station, Texas 77842-3012, United States
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18
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Medina FG, Marrero JG, Macías-Alonso M, González MC, Córdova-Guerrero I, Teissier García AG, Osegueda-Robles S. Coumarin heterocyclic derivatives: chemical synthesis and biological activity. Nat Prod Rep 2015; 32:1472-507. [PMID: 26151411 DOI: 10.1039/c4np00162a] [Citation(s) in RCA: 306] [Impact Index Per Article: 34.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
This review highlights the broad range of science that has arisen from the synthesis of coumarin-linked and fused heterocycle derivatives. Specific topics include their synthesis and biological activity.
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Affiliation(s)
- Fernanda G Medina
- Instituto Politécnico Nacional, Unidad Profesional Interdisciplinaria de Ingeniería Campus Guanajuato, Av. Mineral de Valenciana, No. 200, Col. Fracc. Industrial Puerto Interior, C.P. 36275 Silao de la Victoria, Guanajuato, Mexico.
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19
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Wang H, Tang P, Zhou Q, Zhang D, Chen Z, Huang H, Qin Y. One-Pot Synthesis of Multisubstituted Butyrolactonimidates: Total Synthesis of (−)-Nephrosteranic Acid. J Org Chem 2015; 80:2494-502. [PMID: 25671631 DOI: 10.1021/jo5029166] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
Affiliation(s)
- Huijing Wang
- Innovative
Drug Research Centre and Bioengineering College, Chongqing University, Chongqing 401331, China
| | - Pei Tang
- Innovative
Drug Research Centre and Bioengineering College, Chongqing University, Chongqing 401331, China
| | - Qilong Zhou
- Innovative
Drug Research Centre and Bioengineering College, Chongqing University, Chongqing 401331, China
| | - Dan Zhang
- Innovative
Drug Research Centre and Bioengineering College, Chongqing University, Chongqing 401331, China
| | - Zhitao Chen
- Innovative
Drug Research Centre and Bioengineering College, Chongqing University, Chongqing 401331, China
| | - Hongxiu Huang
- Key
Laboratory of Drug Targeting and Drug Delivery Systems of the Ministry
of Education, West China School of Pharmacy, Sichuan University, Chengdu, 610041, China
| | - Yong Qin
- Key
Laboratory of Drug Targeting and Drug Delivery Systems of the Ministry
of Education, West China School of Pharmacy, Sichuan University, Chengdu, 610041, China
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20
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Synthesis of 4-(thien-2-yl)-substituted coumarins through Lewis acid catalyzed Michael addition of thiophenes to 3-benzoylcoumarins followed by oxidation. Tetrahedron Lett 2014. [DOI: 10.1016/j.tetlet.2014.04.112] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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21
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Chittoory AK, Kumari G, Mohapatra S, Kundu PP, Maji TK, Narayana C, Rajaram S. Conformational change in a urea catalyst induced by sodium cation and its effect on enantioselectivity of a Friedel-Crafts reaction. Tetrahedron 2014. [DOI: 10.1016/j.tet.2014.03.068] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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22
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Auvil TJ, Schafer AG, Mattson AE. Design Strategies for Enhanced Hydrogen-Bond Donor Catalysts. European J Org Chem 2014. [DOI: 10.1002/ejoc.201400035] [Citation(s) in RCA: 156] [Impact Index Per Article: 15.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
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23
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Barakat A, Al-Majid AM, Al-Qahatany FM, Islam MS, Al-Agamy MH. Synthesis, Characterization and Antimicrobial Activity of Novel Pharmacophores Incorporating Imidazoline-Oxazoline Scaffold. B KOREAN CHEM SOC 2014. [DOI: 10.5012/bkcs.2014.35.2.562] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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24
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Shao Z, Xu L, Wang L, Wei H, Xiao J. Catalyst-free tandem Michael addition/decarboxylation of (thio)coumarin-3-carboxylic acids with indoles: facile synthesis of indole-3-substituted 3,4-dihydro(thio)coumarins. Org Biomol Chem 2014; 12:2185-8. [DOI: 10.1039/c3ob42582g] [Citation(s) in RCA: 36] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Abstract
The tandem Michael addition/decarboxylation of (thio)-coumarin-3-carboxylic acids with indoles gives biologically important indole-3-substituted dihydrocoumarins in good to excellent yields under catalyst-free conditions.
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Affiliation(s)
- Zhuzhou Shao
- College of Chemistry and Pharmaceutical Sciences
- Qingdao Agricultural University
- Qingdao, China
| | - Lubin Xu
- College of Chemistry and Pharmaceutical Sciences
- Qingdao Agricultural University
- Qingdao, China
| | - Liang Wang
- College of Chemistry and Pharmaceutical Sciences
- Qingdao Agricultural University
- Qingdao, China
| | - Hongtao Wei
- College of Chemistry and Pharmaceutical Sciences
- Qingdao Agricultural University
- Qingdao, China
| | - Jian Xiao
- College of Chemistry and Pharmaceutical Sciences
- Qingdao Agricultural University
- Qingdao, China
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25
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Nickerson DM, Angeles VV, Mattson AE. Urea Activation of Nitrimines: A Mild, Metal-Free Approach to Sterically Hindered Enamines. Org Lett 2013; 15:5000-3. [PMID: 24070092 DOI: 10.1021/ol402310b] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- David M. Nickerson
- The Ohio State University, Department of Chemistry and Biochemistry, 100 West 18th Avenue, Columbus, Ohio 43210, United States
| | - Veronica V. Angeles
- The Ohio State University, Department of Chemistry and Biochemistry, 100 West 18th Avenue, Columbus, Ohio 43210, United States
| | - Anita E. Mattson
- The Ohio State University, Department of Chemistry and Biochemistry, 100 West 18th Avenue, Columbus, Ohio 43210, United States
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Nickerson DM, Angeles VV, Auvil TJ, So SS, Mattson AE. Internal Lewis acid assisted ureas: tunable hydrogen bond donor catalysts. Chem Commun (Camb) 2013. [DOI: 10.1039/c2cc37073e] [Citation(s) in RCA: 53] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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