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Rina YA, Schmidt JAR. Alpha-metalated N, N-dimethylbenzylamine rare-earth metal complexes and their catalytic applications. Dalton Trans 2024. [PMID: 38757291 DOI: 10.1039/d4dt00826j] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/18/2024]
Abstract
This perspective summarizes our group's extensive research in the realm of organometallic lanthanide complexes, while also placing the catalytic reactions supported by these species within the context of known lanthanide catalysis worldwide, with a specific focus on phosphorus-based catalytic reactions such as intermolecular hydrophosphination and hydrophosphinylation. α-Metalated N,N-dimethylbenzylamine ligands have been utilized to generate homoleptic lanthanide complexes, which have subsequently proven to be highly active lanthanum-based catalysts. The main goal of our research program has been to enhance the catalytic efficiency of lanthanum-based complexes, which began with initial successes in the stoichiometric synthesis of organometallic lanthanide complexes and utilization of these species in catalytic hydrophosphination reactions. Not only have these species supported traditional lanthanide catalysis, such as the hydrophosphination of heterocumulenes like carbodiimides, isocyanates, and isothiocyanates, but they have also been effective for a plethora of catalytic reactions tested thus far, including the hydrophosphinylation and hydrophosphorylation of nitriles, hydrophosphination and hydrophosphinylation of alkynes and alkenes, and the heterodehydrocoupling of silanes and amines. Each of these catalytic transformations is meritorious in its own right, offering new synthetic routes to generate organic scaffolds with enhanced functionality while concurrently minimizing both waste generation and energy consumption. Objectives: We aim for the research summary presented herein to inspire and encourage other researchers to investigate f-element based stoichiometric and catalytic reactions. Our efforts in this field began with the recognition that potassium salts of benzyldimethylamine preferred deprotonation at the α-position, rather than the ortho-position, and we wondered if this regiochemistry would be retained in the formation of lanthanide complexes. The pursuit of this simple idea led first to a series of structurally fascinating homoleptic organometallic lanthanide complexes with surprisingly good stability. Fundamental studies of the protonolysis chemistry of these complexes ultimately revealed highly versatile lanthanide-based precatalysts that have propelled a catalytic investigation spanning more than a decade. We anticipate that this summative perspective will animate the synthetic as well as biological communities to consider La(DMBA)3-based catalytic methods in the synthesis of functionalized organic scaffolds as an atom-economic, convenient, and efficient methodology. Ultimately, we envision our work making a positive impact on the advancement of novel chemical transformations and contributing to progress in various fields of science and technology.
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Affiliation(s)
- Yesmin Akter Rina
- Department of Chemistry & Biochemistry, School of Green Chemistry and Engineering, College of Natural Sciences and Mathematics, The University of Toledo, 2801 W. Bancroft St. MS 602, Toledo, Ohio 43606-3390, USA.
| | - Joseph A R Schmidt
- Department of Chemistry & Biochemistry, School of Green Chemistry and Engineering, College of Natural Sciences and Mathematics, The University of Toledo, 2801 W. Bancroft St. MS 602, Toledo, Ohio 43606-3390, USA.
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Zhu X, Liu F, Ba X, Wu Y. Tandem Suzuki Polymerization/Heck Cyclization Reaction to Form Ladder-Type 9,9'-Bifluorenylidene-Based Conjugated Polymer. Polymers (Basel) 2023; 15:3360. [PMID: 37631417 PMCID: PMC10458247 DOI: 10.3390/polym15163360] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/13/2023] [Revised: 07/28/2023] [Accepted: 08/07/2023] [Indexed: 08/27/2023] Open
Abstract
The synthesis of ladder-type 9,9'-bifluorenylidene-based conjugated polymer is reported. Unlike the typical synthetic strategy, the new designed ladder-type conjugated polymer is achieved via tandem Suzuki polymerization/Heck cyclization reaction in one-pot. In the preparation process, Suzuki polymerization reaction occurred first and then the intramolecular Heck cyclization followed smoothly under the same catalyst Pd(PPh3)4. The model reaction proved that the introduction of iodine (I) for this tandem reaction can effectively control the sequential bond-forming process and inhibit the additional competitive side reactions. Thus, small-molecule model compounds could be obtained in high yields. The successes of the synthesized small molecule and polymer compounds indicate that the Pd-catalyzed tandem reaction may be an effective strategy for improving extended π-conjugated materials.
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Affiliation(s)
- Xiaoyan Zhu
- College of Chemistry and Materials Science, Hebei University, Baoding 071002, China; (X.Z.); (X.B.)
| | - Feng Liu
- College of Basic Medicine, Hebei University, Baoding 071002, China
| | - Xinwu Ba
- College of Chemistry and Materials Science, Hebei University, Baoding 071002, China; (X.Z.); (X.B.)
| | - Yonggang Wu
- College of Chemistry and Materials Science, Hebei University, Baoding 071002, China; (X.Z.); (X.B.)
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3
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Chouhan KK, Chowdhury D, Mukherjee A. Cyclotrimetaphosphate-assisted ruthenium catalyst for the hydration of nitriles and oxidation of primary amines to amides under aerobic conditions in water. Org Biomol Chem 2023; 21:2429-2439. [PMID: 36876451 DOI: 10.1039/d3ob00062a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/22/2023]
Abstract
Amide bonds are ubiquitous and regarded as an essential constituent of many biologically active drug molecules and fine chemicals. We report a practical and operationally simple ruthenium-based catalytic system for the hydration of nitriles and aerobic oxidation of primary amines to the corresponding amides. Both reactions proceed without any external oxidant in water under aerobic conditions and exhibit a broad substrate scope. The mechanistic investigation was executed with the aid of control experiments and kinetic and spectroscopic studies of the reaction mixture.
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Affiliation(s)
- Kishor Kumar Chouhan
- Department of Chemistry, Indian Institute of Technology Bhilai, GEC Campus, Sejbahar, Raipur, Chhattisgarh 492015, India.
| | - Deep Chowdhury
- Department of Chemistry, Indian Institute of Technology Bhilai, GEC Campus, Sejbahar, Raipur, Chhattisgarh 492015, India.
| | - Arup Mukherjee
- Department of Chemistry, Indian Institute of Technology Bhilai, GEC Campus, Sejbahar, Raipur, Chhattisgarh 492015, India.
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4
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Gao Q, Li YH, Chen DZ, Liu JB. Exploration of Ligand-Centered Hydride Transfer in La/Y-Catalyzed Deoxygenative Reduction of Tertiary Amides with Pinacolborane. Inorg Chem 2023; 62:1580-1590. [PMID: 36649499 DOI: 10.1021/acs.inorgchem.2c03793] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
Abstract
A number of rare-earth metals and actinides have proven to be active in a wide variety of atom-efficient transformations. As compared to the related organometallic catalysts, the detailed mechanisms for the rare-earth metal-catalyzed reactions remain largely unexplored. Herein, the detailed catalyst activation process and reaction mechanisms of deoxygenative reduction of amides with pinacolborane (HBpin) catalyzed by Y[N(TMS)2]3 and La[N(TMS)2]3 complexes as well as a La4(O)acac10 cluster are investigated by density functional theory calculations. The M(III)-hemiaminal complex is disclosed to be the active catalyst for both the complexes and the cluster. During catalyst activation for both the Y and La complexes, the H-B bond polarity results in the formation of a transient M(III)-hydride intermediate, which is converted into an on-cycle M(III)-hemiaminal complex via facile migratory insertion. However, this kind of La(III)-hydride species cannot be formed for the La cluster. Starting from the M(III)-hemiaminal complex, the reaction proceeds via the ligand-centered hydride transfer mechanism that involves B-O bond formation, hydride transfer to B, C-O cleavage within the hemiaminal borane, hydride transfer to C, and σ-bond metathesis. The additional HBpin molecule is vital for the first hydride transfer that leads to the formation of [H2Bpin]- species. Our calculations reveal several important cooperative effects of the HBpin component during the hydride transfer processes. The improved mechanistic insights will be helpful for further development of selective C═O reduction.
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Affiliation(s)
- Qian Gao
- College of Chemistry, Chemical Engineering and Materials Science, Shandong Normal University, Jinan 250014, P. R. China
| | - Yu-Hang Li
- College of Chemistry, Chemical Engineering and Materials Science, Shandong Normal University, Jinan 250014, P. R. China
| | - De-Zhan Chen
- College of Chemistry, Chemical Engineering and Materials Science, Shandong Normal University, Jinan 250014, P. R. China
| | - Jian-Biao Liu
- College of Chemistry, Chemical Engineering and Materials Science, Shandong Normal University, Jinan 250014, P. R. China
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Nishimura K, Hanzawa R, Sugai T, Fuwa H. Ruthenium-Catalyzed Intramolecular Double Hydrofunctionalization of Alkynes. Synthesis of Spirocyclic Hemiaminal Ethers and Their Lewis Acid-Mediated Cleavage/Nucleophilic Addition. J Org Chem 2021; 86:6674-6697. [PMID: 33861607 DOI: 10.1021/acs.joc.1c00443] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
[RuCl2(p-cymene)]2/AgNO3-catalyzed intramolecular double hydrofunctionalization of internal alkynes having nitrogen and oxygen nucleophilic groups at appropriate positions provided a series of spirocyclic hemiaminal ether derivatives in good to excellent yields. The product spiro-hemiaminal ethers underwent Lewis acid-mediated chemoselective cleavage, and in situ-generated iminium/oxocarbenium ions could be trapped with nucleophiles to afford a range of nitrogen and oxygen heterocycles.
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Affiliation(s)
- Kazuma Nishimura
- Department of Applied Chemistry, Faculty of Science and Engineering, Chuo University, 1-13-27 Kasuga, Bunkyo-ku, Tokyo 112-8551, Japan
| | - Ryohei Hanzawa
- Department of Applied Chemistry, Faculty of Science and Engineering, Chuo University, 1-13-27 Kasuga, Bunkyo-ku, Tokyo 112-8551, Japan
| | - Tomoya Sugai
- Department of Applied Chemistry, Faculty of Science and Engineering, Chuo University, 1-13-27 Kasuga, Bunkyo-ku, Tokyo 112-8551, Japan
| | - Haruhiko Fuwa
- Department of Applied Chemistry, Faculty of Science and Engineering, Chuo University, 1-13-27 Kasuga, Bunkyo-ku, Tokyo 112-8551, Japan
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de la Cruz-Martínez F, Martínez de Sarasa Buchaca M, Fernández-Baeza J, Sánchez-Barba LF, Rodríguez AM, Castro-Osma JA, Lara-Sánchez A. Zinc-Catalyzed Hydroalkoxylation/Cyclization of Alkynyl Alcohols. Inorg Chem 2021; 60:5322-5332. [PMID: 33719419 DOI: 10.1021/acs.inorgchem.1c00309] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
Abstract
Despite the great interest in zinc catalysis for hydroelementation reactions, the use of zinc complexes as catalysts for the hydroalkoxylation of alkynyl alcohols has not been reported to date. Scorpionate zinc complexes have been successfully designed as precatalysts for the hydroalkoxylation reaction of alkynyl alcohols under mild reaction conditions. Zinc amide complex 8 has been shown to be an excellent precatalyst for the highly selective intramolecular hydroalkoxylation process to yield the corresponding exocyclic enol ethers. Kinetic studies have been performed and confirmed that reactions are first-order in [catalyst] and zero-order in [alkynyl alcohol]. NMR spectroscopy and X-ray diffraction analysis provided evidence for the formation of an alkynyl zinc compound which has been shown to be a key intermediate in the hydroalkoxylation process. On the basis of the experimental results, a catalytic cycle is proposed.
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Affiliation(s)
- Felipe de la Cruz-Martínez
- Universidad de Castilla-La Mancha, Departamento de Química Inorgánica, Orgánica y Bioquímica-Centro de Innovación en Química Avanzada (ORFEO-CINQA), Facultad de Ciencias y Tecnologías Químicas, 13071-Ciudad Real, Spain
| | - Marc Martínez de Sarasa Buchaca
- Universidad de Castilla-La Mancha, Departamento de Química Inorgánica, Orgánica y Bioquímica-Centro de Innovación en Química Avanzada (ORFEO-CINQA), Facultad de Ciencias y Tecnologías Químicas, 13071-Ciudad Real, Spain
| | - Juan Fernández-Baeza
- Universidad de Castilla-La Mancha, Departamento de Química Inorgánica, Orgánica y Bioquímica-Centro de Innovación en Química Avanzada (ORFEO-CINQA), Facultad de Ciencias y Tecnologías Químicas, 13071-Ciudad Real, Spain
| | - Luis F Sánchez-Barba
- Universidad Rey Juan Carlos, Departamento de Biología y Geología, Física y Química Inorgánica, 28933-Móstoles, Spain
| | - Ana M Rodríguez
- Universidad de Castilla-La Mancha, Departamento de Química Inorgánica, Orgánica y Bioquímica-Centro de Innovación en Química Avanzada (ORFEO-CINQA), Facultad de Ciencias y Tecnologías Químicas, 13071-Ciudad Real, Spain
| | - José A Castro-Osma
- Universidad de Castilla-La Mancha, Departamento de Química Inorgánica, Orgánica y Bioquímica-Centro de Innovación en Química Avanzada (ORFEO-CINQA), Facultad de Farmacia, 02071-Albacete, Spain
| | - Agustín Lara-Sánchez
- Universidad de Castilla-La Mancha, Departamento de Química Inorgánica, Orgánica y Bioquímica-Centro de Innovación en Química Avanzada (ORFEO-CINQA), Facultad de Ciencias y Tecnologías Químicas, 13071-Ciudad Real, Spain
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Affiliation(s)
- Rachel D. Dicken
- Department of Chemistry, Northwestern University, 2145 Sheridan Road, Evanston, Illinois 60208-3113, United States
| | - Alessandro Motta
- Dipartimento di Scienze Chimiche, Università di Roma “La Sapienza” and INSTM, UdR Roma, Piazzale Aldo Moro 5, I-00185 Roma, Italy
| | - Tobin J. Marks
- Department of Chemistry, Northwestern University, 2145 Sheridan Road, Evanston, Illinois 60208-3113, United States
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8
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Barger CJ, Dicken RD, Weidner VL, Motta A, Lohr TL, Marks TJ. La[N(SiMe3)2]3-Catalyzed Deoxygenative Reduction of Amides with Pinacolborane. Scope and Mechanism. J Am Chem Soc 2020; 142:8019-8028. [DOI: 10.1021/jacs.0c02446] [Citation(s) in RCA: 41] [Impact Index Per Article: 10.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Affiliation(s)
- Christopher J. Barger
- Department of Chemistry, Northwestern University, 2145 Sheridan Road, Evanston, Illinois 60208-3113, United States
| | - Rachel D. Dicken
- Department of Chemistry, Northwestern University, 2145 Sheridan Road, Evanston, Illinois 60208-3113, United States
| | - Victoria L. Weidner
- Department of Chemistry, Northwestern University, 2145 Sheridan Road, Evanston, Illinois 60208-3113, United States
| | - Alessandro Motta
- Dipartimento di Scienze Chimiche, Università di Roma “La Sapienza” and INSTM, UdR Roma, Piazzale Aldo Moro 5, Roma I-00185, Italy
| | - Tracy L. Lohr
- Department of Chemistry, Northwestern University, 2145 Sheridan Road, Evanston, Illinois 60208-3113, United States
| | - Tobin J. Marks
- Department of Chemistry, Northwestern University, 2145 Sheridan Road, Evanston, Illinois 60208-3113, United States
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9
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Ishida T, Sawanaka Y, Toyama R, Ji Z, Mori H, Nishihara Y. Synthesis of Dinaphtho[2,3- d:2',3'- d']anthra[1,2- b:5,6- b']dithiophene (DNADT) Derivatives: Effect of Alkyl Chains on Transistor Properties. Int J Mol Sci 2020; 21:ijms21072447. [PMID: 32244801 PMCID: PMC7177802 DOI: 10.3390/ijms21072447] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [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: 03/16/2020] [Revised: 03/27/2020] [Accepted: 03/28/2020] [Indexed: 01/18/2023] Open
Abstract
To investigate organic field-effect transistor (OFET) properties, a new thienoacene-type molecule, 4,14-dihexyldinaphtho[2,3-d:2’,3’-d’]anthra[1,2-b:5,6-b’]dithiophene (C6-DNADT), consisting of π-conjugated nine aromatic rings and two hexyl chains along the longitudinal molecular axis has been successfully synthesized by sequential reactions, including Negishi coupling, epoxidation, and cycloaromatization. The fabricated OFET using thin films of C6-DNADT exhibited p-channel FET properties with field-effect mobilities (µ) of up to 2.6 × 10−2 cm2 V−1 s−1, which is ca. three times lower than that of the parent DNADT molecule (8.5 × 10−2 cm2 V−1 s−1). Although this result implies that the installation of relatively short alkyl chains into the DNADT core is not suitable for transistor application, the origins for the FET performance obtained in this work is fully discussed, based on theoretical calculations and solid-state structure of C6-DNADT by grazing incidence wide-angle X-ray scattering (GIWAXS) and atomic force microscopy (AFM) analyses. The results obtained in this study disclose the effect of alkyl chains introduced onto the molecule on transistor characteristics.
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Affiliation(s)
- Takumi Ishida
- Graduate School of Natural Science and Technology, Okayama University, 3-1-1 Tsushimanaka, Kita-ku, Okayama 700-8530, Japan; (T.I.); (Y.S.); (R.T.); (Z.J.)
| | - Yuta Sawanaka
- Graduate School of Natural Science and Technology, Okayama University, 3-1-1 Tsushimanaka, Kita-ku, Okayama 700-8530, Japan; (T.I.); (Y.S.); (R.T.); (Z.J.)
| | - Ryota Toyama
- Graduate School of Natural Science and Technology, Okayama University, 3-1-1 Tsushimanaka, Kita-ku, Okayama 700-8530, Japan; (T.I.); (Y.S.); (R.T.); (Z.J.)
| | - Zhenfei Ji
- Graduate School of Natural Science and Technology, Okayama University, 3-1-1 Tsushimanaka, Kita-ku, Okayama 700-8530, Japan; (T.I.); (Y.S.); (R.T.); (Z.J.)
| | - Hiroki Mori
- Research Institute for Interdisciplinary Science, Okayama University, 3-1-1 Tsushimanaka, Kita-ku, Okayama 700-8530, Japan;
| | - Yasushi Nishihara
- Research Institute for Interdisciplinary Science, Okayama University, 3-1-1 Tsushimanaka, Kita-ku, Okayama 700-8530, Japan;
- Correspondence: ; Tel.: +81-86-251-7855
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10
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Barger CJ, Motta A, Weidner VL, Lohr TL, Marks TJ. La[N(SiMe3)2]3-Catalyzed Ester Reductions with Pinacolborane: Scope and Mechanism of Ester Cleavage. ACS Catal 2019. [DOI: 10.1021/acscatal.9b02605] [Citation(s) in RCA: 43] [Impact Index Per Article: 8.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Affiliation(s)
- Christopher J. Barger
- Department of Chemistry, Northwestern University, 2145 Sheridan Road, Evanston, Illinois 60208-3113, United States
| | - Alessandro Motta
- Department of Chemistry, Northwestern University, 2145 Sheridan Road, Evanston, Illinois 60208-3113, United States
- Dipartimento di Scienze Chimiche, Università di Roma “La Sapienza” and INSTM, UdR Roma, Piazzale Aldo Moro 5, Roma I-00185, Italy
| | - Victoria L. Weidner
- Department of Chemistry, Northwestern University, 2145 Sheridan Road, Evanston, Illinois 60208-3113, United States
| | - Tracy L. Lohr
- Department of Chemistry, Northwestern University, 2145 Sheridan Road, Evanston, Illinois 60208-3113, United States
| | - Tobin J. Marks
- Department of Chemistry, Northwestern University, 2145 Sheridan Road, Evanston, Illinois 60208-3113, United States
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Fairley M, Davin L, Hernán-Gómez A, García-Álvarez J, O'Hara CT, Hevia E. s-Block cooperative catalysis: alkali metal magnesiate-catalysed cyclisation of alkynols. Chem Sci 2019; 10:5821-5831. [PMID: 31293771 PMCID: PMC6568277 DOI: 10.1039/c9sc01598a] [Citation(s) in RCA: 20] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/01/2019] [Accepted: 04/26/2019] [Indexed: 01/04/2023] Open
Abstract
Through mixed metal cooperativity, alkali metal magnesiates efficiently catalyse the cyclisation of alkynols.
Mixed s-block metal organometallic reagents have been successfully utilised in the catalytic intramolecular hydroalkoxylation of alkynols. This success has been attributed to the unique manner in which these reagents can overcome the challenges of the reaction: namely OH activation and coordination to and then addition across a C
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C bond. In order to optimise the reaction conditions and to garner vital catalytic system requirements, a series of alkali metal magnesiates were enlisted for the catalytic intramolecular hydroalkoxylation of 4-pentynol. In a prelude to the main investigation, the homometallic magnesium dialkyl reagent MgR2 (where R = CH2SiMe3) was utilised. This reagent was unsuccessful in cyclising the alcohol into 2-methylenetetrahydrofuran 2a or 5-methyl-2,3-dihydrofuran 2b, even in the presence of multidentate Lewis donor molecules such as N,N,N′,N′′,N′′-pentamethyldiethylenetriamine (PMDETA). Alkali metal magnesiates MIMgR3 (when MI = Li, Na or K) performed the cyclisation unsatisfactorily both in the absence/presence of N,N,N′,N′-tetramethylethylenediamine (TMEDA) or PMDETA. When higher-order magnesiates (i.e., MI2MgR4) were employed, in general a marked increase in yield was observed for MI = Na or K; however, the reactions were still sluggish with long reaction times (22–36 h). A major improvement in the catalytic activity of the magnesiates was observed when the crown ether molecule 15-crown-5 was combined with sodium magnesiate Na2MgR4(TMEDA)2 furnishing yields of 87% with 2a : 2b ratios of 95 : 5 after 5 h. Similar high yields of 88% with 2a : 2b ratios of 90 : 10 after 3 h were obtained combining 18-crown-6 with potassium magnesiate K2MgR4(PMDETA)2. Having optimised these systems, substrate scope was examined to probe the range and robustness of 18-crown-6/K2MgR4(PMDETA)2 as a catalyst. A wide series of alkynols, including terminal and internal alkynes which contain a variety of potentially reactive functional groups, were cyclised. In comparison to previously reported monometallic systems, bimetallic 18-crown-6/K2MgR4(PMDETA)2 displays enhanced reactivity towards internal alkynol-cyclisation. Kinetic studies revealed an inhibition effect of substrate on the catalysts via adduct formation and requiring dissociation prior to the rate limiting cyclisation step.
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Affiliation(s)
- Michael Fairley
- WestCHEM , Department of Pure and Applied Chemistry , University of Strathclyde , Glasgow , G1 1XL , UK .
| | - Laia Davin
- WestCHEM , Department of Pure and Applied Chemistry , University of Strathclyde , Glasgow , G1 1XL , UK .
| | - Alberto Hernán-Gómez
- WestCHEM , Department of Pure and Applied Chemistry , University of Strathclyde , Glasgow , G1 1XL , UK .
| | - Joaquín García-Álvarez
- Departamento de Química Orgánica e Inorgánica , Facultad de Química , Universidad de Oviedo , E-33071 Oviedo , Spain
| | - Charles T O'Hara
- WestCHEM , Department of Pure and Applied Chemistry , University of Strathclyde , Glasgow , G1 1XL , UK .
| | - Eva Hevia
- WestCHEM , Department of Pure and Applied Chemistry , University of Strathclyde , Glasgow , G1 1XL , UK .
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Hyodo K, Nishinaga S, Sawanaka Y, Ishida T, Mori H, Nishihara Y. Synthesis and Physicochemical Properties of Dibenzo[2,3- d:2',3'- d']anthra[1,2- b:5,6- b']dithiophene (DBADT) and Its Derivatives: Effect of Substituents on Their Molecular Orientation and Transistor Properties. J Org Chem 2019; 84:698-709. [PMID: 30562469 DOI: 10.1021/acs.joc.8b02557] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
We have synthesized dibenzo[2,3- d:2',3'- d']anthra[1,2- b:5,6- b']dithiophene (DBADT) and several derivatives bearing alkyl and phenyl groups at various positions. The optical and electrochemical properties of the synthesized compounds were investigated. All the fabricated OFET devices exhibited typical p-type behavior under ambient conditions, and diphenyl-substituted analogue-based OFET devices showed excellent mobility, as high as 0.66 cm2 V-1 s-1. The surface morphology and molecular orientation in thin films were also investigated using atomic force microscopy (AFM) and two-dimensional grazing incidence X-ray diffraction (2D-GIXD). It was found that the substituents and their positions affect the molecular orbitals, molecular orientation, and morphology of the thin films, producing different FET performance.
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Affiliation(s)
- Keita Hyodo
- Division of Earth, Life, and Molecular Sciences, Graduate School of Natural Science and Technology , Okayama University , 3-1-1 Tsushimanaka, Kita-ku , Okayama 700-8530 , Japan
| | - Shuhei Nishinaga
- Division of Earth, Life, and Molecular Sciences, Graduate School of Natural Science and Technology , Okayama University , 3-1-1 Tsushimanaka, Kita-ku , Okayama 700-8530 , Japan
| | - Yuta Sawanaka
- Division of Earth, Life, and Molecular Sciences, Graduate School of Natural Science and Technology , Okayama University , 3-1-1 Tsushimanaka, Kita-ku , Okayama 700-8530 , Japan
| | - Takumi Ishida
- Division of Earth, Life, and Molecular Sciences, Graduate School of Natural Science and Technology , Okayama University , 3-1-1 Tsushimanaka, Kita-ku , Okayama 700-8530 , Japan
| | - Hiroki Mori
- Research Institute for Interdisciplinary Science , Okayama University , 3-1-1 Tsushimanaka, Kita-ku , Okayama 700-8530 , Japan
| | - Yasushi Nishihara
- Research Institute for Interdisciplinary Science , Okayama University , 3-1-1 Tsushimanaka, Kita-ku , Okayama 700-8530 , Japan
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13
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Lehnherr D, Ji Y, Neel AJ, Cohen RD, Brunskill APJ, Yang J, Reibarkh M. Discovery of a Photoinduced Dark Catalytic Cycle Using in Situ LED-NMR Spectroscopy. J Am Chem Soc 2018; 140:13843-13853. [DOI: 10.1021/jacs.8b08596] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Dan Lehnherr
- Process Research & Development, Merck & Co., Inc., Rahway, New Jersey 07065, United States
| | - Yining Ji
- Process Research & Development, Merck & Co., Inc., Rahway, New Jersey 07065, United States
| | - Andrew J. Neel
- Process Research & Development, Merck & Co., Inc., Rahway, New Jersey 07065, United States
| | - Ryan D. Cohen
- Process Research & Development, Merck & Co., Inc., Rahway, New Jersey 07065, United States
| | - Andrew P. J. Brunskill
- Process Research & Development, Merck & Co., Inc., Rahway, New Jersey 07065, United States
| | - Junyu Yang
- Process Research & Development, Merck & Co., Inc., Rahway, New Jersey 07065, United States
| | - Mikhail Reibarkh
- Process Research & Development, Merck & Co., Inc., Rahway, New Jersey 07065, United States
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14
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Zhu X, Li G, Xu F, Zhang Y, Xue M, Shen Q. Investigation and mechanistic study into intramolecular hydroalkoxylation of unactivated alkenols catalyzed by cationic lanthanide complexes. Tetrahedron 2017. [DOI: 10.1016/j.tet.2017.01.051] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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15
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Abstract
The last decade has witnessed brilliant and remarkable advances in the chemistry of the early actinides in stoichiometric and in challenging catalytic processes. This canvas of knowledge allows the design of chemical reactivities reaching a high level of sophistication. This review highlights the latest results obtained since 2008 on those catalytic processes.
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Affiliation(s)
- Heng Liu
- Schulich Faculty of Chemistry
- Technion – Israel Institute of Technology
- Technion
- Israel
| | - Tapas Ghatak
- Schulich Faculty of Chemistry
- Technion – Israel Institute of Technology
- Technion
- Israel
| | - Moris S. Eisen
- Schulich Faculty of Chemistry
- Technion – Israel Institute of Technology
- Technion
- Israel
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16
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Hyodo K, Hagiwara H, Toyama R, Mori H, Soga SI, Nishihara Y. Bis[1]benzothieno[2,3-d:2′,3′-d′]anthra[1,2-b:5,6-b′]dithiophene: synthesis, characterization, and application to organic field-effect transistors. RSC Adv 2017. [DOI: 10.1039/c6ra27455b] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023] Open
Abstract
A straightforward synthetic method of BBTADT having nine aromatic rings fused and evaluation of OFET in polycrystalline films are reported.
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Affiliation(s)
- Keita Hyodo
- Division of Earth, Life, and Molecular Sciences
- Graduate School of Natural Science and Technology
- Okayama University
- Okayama 700-8530
- Japan
| | | | - Ryota Toyama
- Division of Earth, Life, and Molecular Sciences
- Graduate School of Natural Science and Technology
- Okayama University
- Okayama 700-8530
- Japan
| | - Hiroki Mori
- Research Institute for Interdisciplinary Science
- Okayama University
- Okayama 700-8530
- Japan
| | | | - Yasushi Nishihara
- Research Institute for Interdisciplinary Science
- Okayama University
- Okayama 700-8530
- Japan
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17
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Esvan YJ, Zeinyeh W, Boibessot T, Nauton L, Théry V, Knapp S, Chaikuad A, Loaëc N, Meijer L, Anizon F, Giraud F, Moreau P. Discovery of pyrido[3,4-g]quinazoline derivatives as CMGC family protein kinase inhibitors: Design, synthesis, inhibitory potency and X-ray co–crystal structure. Eur J Med Chem 2016; 118:170-7. [DOI: 10.1016/j.ejmech.2016.04.004] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/16/2016] [Revised: 03/31/2016] [Accepted: 04/02/2016] [Indexed: 11/18/2022]
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18
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Martínez J, Otero A, Lara-Sánchez A, Castro-Osma JA, Fernández-Baeza J, Sánchez-Barba LF, Rodríguez AM. Heteroscorpionate Rare-Earth Catalysts for the Hydroalkoxylation/Cyclization of Alkynyl Alcohols. Organometallics 2016. [DOI: 10.1021/acs.organomet.6b00203] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
Affiliation(s)
- Javier Martínez
- Universidad de Castilla-La Mancha, Departamento de Química
Inorgánica, Orgánica y Bioquímica, Instituto
Regional de Investigación Científica Aplicada (IRICA),
Centro de Innovación en Química Avanzada (ORFEO-CINQA), 13071 Ciudad Real, Spain
| | - Antonio Otero
- Universidad de Castilla-La Mancha, Departamento de Química
Inorgánica, Orgánica y Bioquímica, Instituto
Regional de Investigación Científica Aplicada (IRICA),
Centro de Innovación en Química Avanzada (ORFEO-CINQA), 13071 Ciudad Real, Spain
| | - Agustín Lara-Sánchez
- Universidad de Castilla-La Mancha, Departamento de Química
Inorgánica, Orgánica y Bioquímica, Instituto
Regional de Investigación Científica Aplicada (IRICA),
Centro de Innovación en Química Avanzada (ORFEO-CINQA), 13071 Ciudad Real, Spain
| | - José Antonio Castro-Osma
- Universidad de Castilla-La Mancha, Departamento de Química
Inorgánica, Orgánica y Bioquímica, Instituto
Regional de Investigación Científica Aplicada (IRICA),
Centro de Innovación en Química Avanzada (ORFEO-CINQA), 13071 Ciudad Real, Spain
| | - Juan Fernández-Baeza
- Universidad de Castilla-La Mancha, Departamento de Química
Inorgánica, Orgánica y Bioquímica, Instituto
Regional de Investigación Científica Aplicada (IRICA),
Centro de Innovación en Química Avanzada (ORFEO-CINQA), 13071 Ciudad Real, Spain
| | - Luis F. Sánchez-Barba
- Departamento
de Biología y Geología, Física y Química
Inorgánica, Universidad Rey Juan Carlos, Móstoles, 28933 Madrid, Spain
| | - Ana M. Rodríguez
- Universidad de Castilla-La Mancha, Departamento de Química
Inorgánica, Orgánica y Bioquímica, Instituto
Regional de Investigación Científica Aplicada (IRICA),
Centro de Innovación en Química Avanzada (ORFEO-CINQA), 13071 Ciudad Real, Spain
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19
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Abstract
To reduce global reliance on fossil fuels, new renewable sources of energy that can be used with the current infrastructure are required. Biomass represents a major source of renewable carbon based fuel; however, the high oxygen content (∼40%) limits its use as a conventional fuel. To utilize biomass as an energy source, not only with current infrastructure, but for maximum energy return, the oxygen content must be reduced. One method to achieve this is to develop selective catalytic methods to cleave C-O bonds commonly found in biomass (aliphatic and aromatic ethers and esters) for the eventual removal of oxygen in the form of volatile H2O or carboxylic acids. Once selective methods of C-O cleavage are understood and perfected, application to processing real biomass feedstocks such as lignin can be undertaken. This Laboratory previously reported that recyclable "green" lanthanide triflates are excellent catalysts for C-O bond-forming hydroalkoxylation reactions. Based on the virtues of microscopic reversibility, the same lanthanide triflate catalyst should catalyze the reverse C-O cleavage process, retrohydroalkoxylation, to yield an alcohol and an alkene. However, ether C-O bond-forming (retrohydroalkoxylation) to form an alcohol and alkene is endothermic. Guided by quantum chemical analysis, our strategy is to couple endothermic, in tandem, ether C-O bond cleavage with exothermic alkene hydrogenation, thereby leveraging the combined catalytic cycles thermodynamically to form an overall energetically favorable C-O cleavage reaction. This Account reviews recent developments on thermodynamically leveraged tandem catalysis for ether and more recently, ester C-O bond cleavage undertaken at Northwestern University. First, the fundamentals of lanthanide-catalyzed hydroelementation are reviewed, with particular focus on ether C-O bond formation (hydroalkoxylation). Next, the reverse C-O cleavage/retrohydroalkoxylation processes enabled by tandem catalysis are discussed for both ether and ester C-O bond cleavage, including mechanistic and computational analysis. This is followed by recent results using this tandem catalytic strategy toward biomass relevant substrates, including work deconstructing acetylated lignin models, and the production of biodiesel from triglycerides, while bypassing the production of undesired glycerol for more valuable C3 products such as diesters (precursors to diols) in up to 47% selectivity. This Account concludes with future prospects for using this tandem catalytic system under real biomass processing conditions.
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Affiliation(s)
- Tracy L. Lohr
- Department of Chemistry, Northwestern University, Evanston, Illinois 60208-3113, United States
| | - Zhi Li
- Department of Chemistry, Northwestern University, Evanston, Illinois 60208-3113, United States
| | - Tobin J. Marks
- Department of Chemistry, Northwestern University, Evanston, Illinois 60208-3113, United States
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20
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Yuan J, Hu H, Cui C. N-Heterocyclic Carbene-Ytterbium Amide as a Recyclable Homogeneous Precatalyst for Hydrophosphination of Alkenes and Alkynes. Chemistry 2016; 22:5778-85. [DOI: 10.1002/chem.201600512] [Citation(s) in RCA: 38] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/03/2016] [Indexed: 11/12/2022]
Affiliation(s)
- Jia Yuan
- State Key Laboratory of Elemento-Organic Chemistry; Nankai University; Tianjin 300071 P. R. China), Fax
| | - Hongfan Hu
- State Key Laboratory of Elemento-Organic Chemistry; Nankai University; Tianjin 300071 P. R. China), Fax
| | - Chunming Cui
- State Key Laboratory of Elemento-Organic Chemistry; Nankai University; Tianjin 300071 P. R. China), Fax
- Collaborative Innovation Center of Chemical Science and Engineering (Tianjin); Tianjin 300071 P. R. China
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21
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Abstract
The past decade has witnessed some remarkable advances in our appreciation of the structural and reaction chemistry of the heavier alkaline earth (Ae = Mg, Ca, Sr, Ba) elements. Derived from complexes of these metals in their immutable +2 oxidation state, a broad and widely applicable catalytic chemistry has also emerged, driven by considerations of cost and inherent low toxicity. The considerable adjustments incurred to ionic radius and resultant cation charge density also provide reactivity with significant mechanistic and kinetic variability as group 2 is descended. In an attempt to place these advances in the broader context of contemporary main group element chemistry, this review focusses on the developing state of the art in both multiple bond heterofunctionalisation and cross coupling catalysis. We review specific advances in alkene and alkyne hydroamination and hydrophosphination catalysis and related extensions of this reactivity that allow the synthesis of a wide variety of acyclic and heterocyclic small molecules. The use of heavier alkaline earth hydride derivatives as pre-catalysts and intermediates in multiple bond hydrogenation, hydrosilylation and hydroboration is also described along with the emergence of these and related reagents in a variety of dehydrocoupling processes that allow that facile catalytic construction of Si-C, Si-N and B-N bonds.
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Affiliation(s)
- Michael S Hill
- Department of Chemistry, University of Bath, Claverton Down, Bath, BA2 7AY, UK.
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22
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Gu X, Zhang L, Zhu X, Wang S, Zhou S, Wei Y, Zhang G, Mu X, Huang Z, Hong D, Zhang F. Synthesis of Bis(NHC)-Based CNC-Pincer Rare-Earth-Metal Amido Complexes and Their Application for the Hydrophosphination of Heterocumulenes. Organometallics 2015. [DOI: 10.1021/acs.organomet.5b00628] [Citation(s) in RCA: 42] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Xiaoxia Gu
- Key
Laboratory of Functional Molecular Solids, Ministry of Education,
Anhui Laboratory of Molecule-Based Materials, College of Chemistry
and Materials Science, Anhui Normal University, Wuhu, Anhui 241000, People’s Republic of China
| | - Lijun Zhang
- Key
Laboratory of Functional Molecular Solids, Ministry of Education,
Anhui Laboratory of Molecule-Based Materials, College of Chemistry
and Materials Science, Anhui Normal University, Wuhu, Anhui 241000, People’s Republic of China
| | - Xiancui Zhu
- Key
Laboratory of Functional Molecular Solids, Ministry of Education,
Anhui Laboratory of Molecule-Based Materials, College of Chemistry
and Materials Science, Anhui Normal University, Wuhu, Anhui 241000, People’s Republic of China
| | - Shaowu Wang
- Key
Laboratory of Functional Molecular Solids, Ministry of Education,
Anhui Laboratory of Molecule-Based Materials, College of Chemistry
and Materials Science, Anhui Normal University, Wuhu, Anhui 241000, People’s Republic of China
- State
Key Laboratory of Organometallic Chemistry, Shanghai Institute of
Organic Chemistry, Chinese Academy of Sciences, Shanghai 200032, People’s Republic of China
| | - Shuangliu Zhou
- Key
Laboratory of Functional Molecular Solids, Ministry of Education,
Anhui Laboratory of Molecule-Based Materials, College of Chemistry
and Materials Science, Anhui Normal University, Wuhu, Anhui 241000, People’s Republic of China
| | - Yun Wei
- Key
Laboratory of Functional Molecular Solids, Ministry of Education,
Anhui Laboratory of Molecule-Based Materials, College of Chemistry
and Materials Science, Anhui Normal University, Wuhu, Anhui 241000, People’s Republic of China
| | - Guangchao Zhang
- Key
Laboratory of Functional Molecular Solids, Ministry of Education,
Anhui Laboratory of Molecule-Based Materials, College of Chemistry
and Materials Science, Anhui Normal University, Wuhu, Anhui 241000, People’s Republic of China
| | - Xiaolong Mu
- Key
Laboratory of Functional Molecular Solids, Ministry of Education,
Anhui Laboratory of Molecule-Based Materials, College of Chemistry
and Materials Science, Anhui Normal University, Wuhu, Anhui 241000, People’s Republic of China
| | - Zeming Huang
- Key
Laboratory of Functional Molecular Solids, Ministry of Education,
Anhui Laboratory of Molecule-Based Materials, College of Chemistry
and Materials Science, Anhui Normal University, Wuhu, Anhui 241000, People’s Republic of China
| | - Dongjing Hong
- Key
Laboratory of Functional Molecular Solids, Ministry of Education,
Anhui Laboratory of Molecule-Based Materials, College of Chemistry
and Materials Science, Anhui Normal University, Wuhu, Anhui 241000, People’s Republic of China
| | - Feng Zhang
- Key
Laboratory of Functional Molecular Solids, Ministry of Education,
Anhui Laboratory of Molecule-Based Materials, College of Chemistry
and Materials Science, Anhui Normal University, Wuhu, Anhui 241000, People’s Republic of China
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23
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Nagata H, Sugimoto Y, Ito Y, Tanaka M, Yoshimatsu M. Nickel–palladium-catalyzed hydroamination/cyclization of sulfur-substituted 1,6-diynes with secondary amines. Tetrahedron 2014. [DOI: 10.1016/j.tet.2013.12.049] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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24
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Zamora MT, Johnson KRD, Hänninen MM, Hayes PG. Differences in the cyclometalation reactivity of bisphosphinimine-supported organo-rare earth complexes. Dalton Trans 2014; 43:10739-50. [DOI: 10.1039/c4dt00863d] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A novel yttrium complex [LnY(CH2SiMe3)2] is resistant to cyclometalation, while samarium variants undergo C–H activation, forming unique cyclometalated motifs.
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Affiliation(s)
- Matthew T Zamora
- Department of Chemistry and Biochemistry, University of Lethbridge, 4401 University Drive, Lethbridge, AB, CanadaT1K 3M4.
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25
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Mukherjee A, Sen TK, Ghorai PK, Mandal SK. Organozinc Catalyst on a Phenalenyl Scaffold for Intramolecular Hydroamination of Aminoalkenes. Organometallics 2013. [DOI: 10.1021/om400906u] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
Affiliation(s)
- Arup Mukherjee
- Department of Chemical Sciences, Indian Institute of Science Education and Research-Kolkata, Mohanpur 741252, Nadia, West Bengal, India
| | - Tamal K. Sen
- Department of Chemical Sciences, Indian Institute of Science Education and Research-Kolkata, Mohanpur 741252, Nadia, West Bengal, India
| | - Pradip Kr. Ghorai
- Department of Chemical Sciences, Indian Institute of Science Education and Research-Kolkata, Mohanpur 741252, Nadia, West Bengal, India
| | - Swadhin K. Mandal
- Department of Chemical Sciences, Indian Institute of Science Education and Research-Kolkata, Mohanpur 741252, Nadia, West Bengal, India
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26
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Mukherjee A, Sen TK, Ghorai PK, Mandal SK. The non-innocent phenalenyl unit: an electronic nest to modulate the catalytic activity in hydroamination reaction. Sci Rep 2013; 3:2821. [PMID: 24084653 DOI: 10.1038/srep02821] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/04/2013] [Accepted: 09/09/2013] [Indexed: 01/15/2023] Open
Abstract
The phenalenyl unit has played intriguing role in different fields of research spanning from chemistry, material chemistry to device physics acting as key electronic reservoir which has not only led to the best organic single component conductor but also created the spin memory device of next generation. Now we show the non-innocent behaviour of phenalenyl unit in modulating the catalytic behaviour in a homogeneous organic transformation. The present study establishes that the cationic state of phenalenyl unit can act as an organic Lewis acceptor unit to influence the catalytic outcome of intermolecular hydroamination reaction of carbodiimides. For the present study, we utilized organoaluminum complexes of phenalenyl ligands in which the phenalenyl unit maintains the closed shell electronic state. The DFT calculation reveals that the energy of LUMO of the catalyst is mainly controlled by phenalenyl ligands which in turn determines the outcome of the catalysis.
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27
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Affiliation(s)
- Xiaoming Zeng
- Center for
Organic Chemistry, Frontier Institute of
Science and Technology, Xi’an Jiaotong University, Xi’an, Shaanxi, 710054, P. R. China
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28
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Affiliation(s)
- Gilles Lemière
- Institut de Chimie de Nice, UMR 7272, Université Nice‐Sophia Antipolis, CNRS, Faculté des Sciences, Parc Valrose, 06108 Nice Cedex 2 (France), Fax: (+33) 4‐92‐07‐61‐89
| | - Elisabet Duñach
- Institut de Chimie de Nice, UMR 7272, Université Nice‐Sophia Antipolis, CNRS, Faculté des Sciences, Parc Valrose, 06108 Nice Cedex 2 (France), Fax: (+33) 4‐92‐07‐61‐89
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29
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Mukherjee A, Sen TK, Mandal SK, Maity B, Koley D. Construction of oxygen-bridged multimetallic assembly: dual catalysts for hydroamination reactions. RSC Adv 2013. [DOI: 10.1039/c2ra21778c] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
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30
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Wobser SD, Stephenson CJ, Delferro M, Marks TJ. Carbostannolysis Mediated by Bis(pentamethylcyclopentadienyl)lanthanide Catalysts. Utility in Accessing Organotin Synthons. Organometallics 2012. [DOI: 10.1021/om301031e] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
Affiliation(s)
- Stephen D. Wobser
- Department of Chemistry, Northwestern University, Evanston, Illinois
60208-3113, United States
| | - Casey J. Stephenson
- Department of Chemistry, Northwestern University, Evanston, Illinois
60208-3113, United States
| | - Massimiliano Delferro
- Department of Chemistry, Northwestern University, Evanston, Illinois
60208-3113, United States
| | - Tobin J. Marks
- Department of Chemistry, Northwestern University, Evanston, Illinois
60208-3113, United States
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31
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Wobser SD, Marks TJ. Organothorium-Catalyzed Hydroalkoxylation/Cyclization of Alkynyl Alcohols. Scope, Mechanism, and Ancillary Ligand Effects. Organometallics 2012. [DOI: 10.1021/om300881b] [Citation(s) in RCA: 52] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/16/2023]
Affiliation(s)
- Stephen D. Wobser
- Department of Chemistry, Northwestern University, Evanston, Illinois 60208-3113,
United States
| | - Tobin J. Marks
- Department of Chemistry, Northwestern University, Evanston, Illinois 60208-3113,
United States
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32
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Godeau J, Fontaine-Vive F, Antoniotti S, Duñach E. Experimental and theoretical studies on the bismuth-triflate-catalysed cycloisomerisation of 1,6,10-trienes and aryl polyenes. Chemistry 2012; 18:16815-22. [PMID: 23143886 DOI: 10.1002/chem.201202263] [Citation(s) in RCA: 35] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/26/2012] [Revised: 10/01/2012] [Indexed: 11/07/2022]
Abstract
Cycloisomerisation of polyenes such as diethyl geranylprenylmalonate [(E)-1 a], diethyl geranylphenylmalonate [(E)-2 a] and diethyl cinnamylgeranylmalonate [(E,E)-3 a] catalysed by bismuth triflate was studied from experimental and theoretical viewpoints. Several intermediates were isolated and characterised, and calculated transition-state structures are proposed for the three reactions. The diastereoselectivity observed during the reaction of (E)- or (Z)-2 a in favour of the formation of trans-fused bicyclic products is discussed in detail. The nature of the active catalytic species derived from bismuth triflate was also investigated, and the formation of a hybrid Lewis acid/Brønsted acid catalyst with water molecules is proposed, supported by experimental and theoretical data.
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Affiliation(s)
- Julien Godeau
- Institut de Chimie de Nice, UMR, Université de Nice Sophia Antipolis-CNRS, France
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33
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34
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Xie W, Hu H, Cui C. [(NHC)Yb{N(SiMe3)2}2]-Catalyzed Cross-Dehydrogenative Coupling of Silanes with Amines. Angew Chem Int Ed Engl 2012; 51:11141-4. [DOI: 10.1002/anie.201205317] [Citation(s) in RCA: 80] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/05/2012] [Indexed: 11/08/2022]
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35
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Pouy MJ, Delp SA, Uddin J, Ramdeen VM, Cochrane NA, Fortman GC, Gunnoe TB, Cundari TR, Sabat M, Myers WH. Intramolecular Hydroalkoxylation and Hydroamination of Alkynes Catalyzed by Cu(I) Complexes Supported by N-Heterocyclic Carbene Ligands. ACS Catal 2012. [DOI: 10.1021/cs300544w] [Citation(s) in RCA: 58] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Mark J. Pouy
- Department of Chemistry,
University
of Virginia, Charlottesville, Virginia 22904, United States
| | - Samuel A. Delp
- Department of Chemistry,
University
of Virginia, Charlottesville, Virginia 22904, United States
| | - Jamal Uddin
- Center for Advanced Scientific
Computing and Modeling (CASCaM), Department of Chemistry, University
of North Texas, Box 305070, Denton, Texas 76203-5070, United States
| | - Vijay M. Ramdeen
- Department of Chemistry,
University
of Virginia, Charlottesville, Virginia 22904, United States
| | - Nikki A. Cochrane
- Department of Chemistry,
University
of Virginia, Charlottesville, Virginia 22904, United States
| | - George C. Fortman
- Department of Chemistry,
University
of Virginia, Charlottesville, Virginia 22904, United States
| | - T. Brent Gunnoe
- Department of Chemistry,
University
of Virginia, Charlottesville, Virginia 22904, United States
| | - Thomas R. Cundari
- Center for Advanced Scientific
Computing and Modeling (CASCaM), Department of Chemistry, University
of North Texas, Box 305070, Denton, Texas 76203-5070, United States
| | - Michal Sabat
- Department of Chemistry,
University
of Virginia, Charlottesville, Virginia 22904, United States
| | - William H. Myers
- Department of Chemistry, University
of Richmond, Richmond, Virginia 23173, United States
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36
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Atesin AC, Ray NA, Stair PC, Marks TJ. Etheric C–O Bond Hydrogenolysis Using a Tandem Lanthanide Triflate/Supported Palladium Nanoparticle Catalyst System. J Am Chem Soc 2012; 134:14682-5. [DOI: 10.1021/ja306309u] [Citation(s) in RCA: 82] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Abdurrahman C. Atesin
- Department
of Chemistry, Northwestern University,
2145 Sheridan Road, Evanston,
Illinois 60208, United States
| | - Natalie A. Ray
- Department
of Chemistry, Northwestern University,
2145 Sheridan Road, Evanston,
Illinois 60208, United States
| | - Peter C. Stair
- Department
of Chemistry, Northwestern University,
2145 Sheridan Road, Evanston,
Illinois 60208, United States
- Chemical Sciences and Engineering
Division, Argonne National Laboratory,
Argonne, Illinois 60439, United States
| | - Tobin J. Marks
- Department
of Chemistry, Northwestern University,
2145 Sheridan Road, Evanston,
Illinois 60208, United States
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Mukherjee A, Sen TK, Ghorai PK, Samuel PP, Schulzke C, Mandal SK. Phenalenyl-based organozinc catalysts for intramolecular hydroamination reactions: a combined catalytic, kinetic, and mechanistic investigation of the catalytic cycle. Chemistry 2012; 18:10530-45. [PMID: 22807308 DOI: 10.1002/chem.201200868] [Citation(s) in RCA: 47] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/15/2012] [Indexed: 11/10/2022]
Abstract
Herein, we report the synthesis and characterization of two organozinc complexes that contain symmetrical phenalenyl (PLY)-based N,N-ligands. The reactions of phenalenyl-based ligands with ZnMe(2) led to the formation of organozinc complexes [N(Me),N(Me)-PLY]ZnMe (1) and [N(iPr),N(iPr)-PLY]ZnMe (2) under the evolution of methane. Both complexes (1 and 2) were characterized by NMR spectroscopy and elemental analysis. The solid-state structures of complexes 1 and 2 were determined by single-crystal X-ray crystallography. Complexes 1 and 2 were used as catalysts for the intramolecular hydroamination of unactivated primary and secondary aminoalkenes. A combined approach of NMR spectroscopy and DFT calculations was utilized to obtain better insight into the mechanistic features of the zinc-catalyzed hydroamination reactions. The progress of the catalysis for primary and secondary aminoalkene substrates with catalyst 2 was investigated by detailed kinetic studies, including kinetic isotope effect measurements. These results suggested pseudo-first-order kinetics for both primary and secondary aminoalkene activation processes. Eyring and Arrhenius analyses for the cyclization of a model secondary aminoalkene substrate afforded ΔH(≠) =11.3 kcal mol(-1) , ΔS(≠) =-35.75 cal K(-1) mol(-1) , and E(a) =11.68 kcal mol(-1) . Complex 2 exhibited much-higher catalytic activity than complex 1 under identical reaction conditions. The in situ NMR experiments supported the formation of a catalytically active zinc cation and the DFT calculations showed that more active catalyst 2 generated a more stable cation. The stability of the catalytically active zinc cation was further supported by an in situ recycling procedure, thereby confirming the retention of catalytic activity of compound 2 for successive catalytic cycles. The DFT calculations showed that the preferred pathway for the zinc-catalyzed hydroamination reactions is alkene activation rather than the alternative amine-activation pathway. A detailed investigation with DFT methods emphasized that the remarkably higher catalytic efficiency of catalyst 2 originated from its superior stability and the facile formation of its cation compared to that derived from catalyst 1.
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Affiliation(s)
- Arup Mukherjee
- Department of Chemical Sciences, Indian Institute of Science Education and Research-Kolkata, Mohanpur-741252, India
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Zhao Y, Lin M, Chen Z, Pei H, Li Y, Chen Y, Wang X, Li L, Cao Y, Zhang Y, Li W. Titanium and zirconium amido complexes supported by imidazole-containing ligands: syntheses, characterization and catalytic activities. RSC Adv 2012. [DOI: 10.1039/c1ra00408e] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/31/2023] Open
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VanVeller B, Robinson D, Swager TM. Triptycene Diols: A Strategy for Synthesizing Planar π Systems through Catalytic Conversion of a Poly(p-phenylene ethynylene) into a Poly(p-phenylene vinylene). Angew Chem Int Ed Engl 2011. [DOI: 10.1002/ange.201106985] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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VanVeller B, Robinson D, Swager TM. Triptycene diols: a strategy for synthesizing planar π systems through catalytic conversion of a poly(p-phenylene ethynylene) into a poly(p-phenylene vinylene). Angew Chem Int Ed Engl 2011; 51:1182-6. [PMID: 22213522 DOI: 10.1002/anie.201106985] [Citation(s) in RCA: 46] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/03/2011] [Indexed: 10/14/2022]
Affiliation(s)
- Brett VanVeller
- Department of Chemistry, Massachusetts Institute of Technology, Cambridge, MA 02139, USA
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Affiliation(s)
- Amanda L. Gibeau
- Department of Chemistry and the Center for Chemical Methodology and Library Development (CMLD-BU), Boston University, Boston, Massachusetts 02215, United States
| | - John K. Snyder
- Department of Chemistry and the Center for Chemical Methodology and Library Development (CMLD-BU), Boston University, Boston, Massachusetts 02215, United States
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Lee HJ, Lim C, Hwang S, Jeong BS, Kim S. Silver-Mediated exo-Selective Tandem Desilylative Bromination/Oxycyclization of Silyl-Protected Alkynes: Synthesis of 2-Bromomethylene-Tetrahydrofuran. Chem Asian J 2011; 6:1943-7. [DOI: 10.1002/asia.201100158] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/15/2011] [Indexed: 01/01/2023]
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Zhou S, Wu S, Zhu H, Wang S, Zhu X, Zhang L, Yang G, Cui D, Wang H. Synthesis, structure and catalytic activity of alkali metal-free bent-sandwiched lanthanide amido complexes with calix[4]-pyrrolyl ligands. Dalton Trans 2011; 40:9447-53. [DOI: 10.1039/c1dt10622h] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Weiss CJ, Wobser SD, Marks TJ. Lanthanide- and Actinide-Mediated Terminal Alkyne Hydrothiolation for the Catalytic Synthesis of Markovnikov Vinyl Sulfides. Organometallics 2010. [DOI: 10.1021/om100697h] [Citation(s) in RCA: 77] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Charles J. Weiss
- Department of Chemistry, Northwestern University, Evanston, Illinois 60208, United States
| | - Stephen D. Wobser
- Department of Chemistry, Northwestern University, Evanston, Illinois 60208, United States
| | - Tobin J. Marks
- Department of Chemistry, Northwestern University, Evanston, Illinois 60208, United States
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Abstract
Kinetic isotope effects are exquisitely sensitive probes of transition structure. As such, kinetic isotope effects offer a uniquely useful probe for the symmetry-breaking process that is inherent to stereoselective reactions. In this Concept article, we explore the role of steric and electronic effects in stereocontrol, and we relate these concepts to recent studies carried out in our laboratory. We also explore the way in which kinetic isotope effects serve as useful points of contact with computational models of transition structures. Finally, we discuss future opportunities for kinetic isotope effects to play a role in asymmetric catalyst development.
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Affiliation(s)
- Thomas Giagou
- School of Natural Sciences, University of California Merced, 5200 N. Lake Rd., Merced, CA 95344 (USA)
| | - Matthew P. Meyer
- School of Natural Sciences, University of California Merced, 5200 N. Lake Rd., Merced, CA 95344 (USA)
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Dzudza A, Marks T. Efficient Intramolecular Hydroalkoxylation of Unactivated Alkenols Mediated by Recyclable Lanthanide Triflate Ionic Liquids: Scope and Mechanism. Chemistry 2010; 16:3403-22. [DOI: 10.1002/chem.200902269] [Citation(s) in RCA: 81] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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Weiss CJ, Marks TJ. Organo-f-element catalysts for efficient and highly selective hydroalkoxylation and hydrothiolation. Dalton Trans 2010; 39:6576-88. [DOI: 10.1039/c003089a] [Citation(s) in RCA: 184] [Impact Index Per Article: 13.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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