1
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Ameur Messaoud MY, Bentabed-Ababsa G, Fajloun Z, Hamze M, Halauko YS, Ivashkevich OA, Matulis VE, Roisnel T, Dorcet V, Mongin F. Deprotometalation-Iodolysis and Direct Iodination of 1-Arylated 7-Azaindoles: Reactivity Studies and Molecule Properties. Molecules 2021; 26:6314. [PMID: 34684895 PMCID: PMC8537530 DOI: 10.3390/molecules26206314] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/17/2021] [Revised: 10/13/2021] [Accepted: 10/15/2021] [Indexed: 11/17/2022] Open
Abstract
Five protocols were first compared for the copper-catalyzed C-N bond formation between 7-azaindole and aryl/heteroaryl iodides/bromides. The 1-arylated 7-azaindoles thus obtained were subjected to deprotometalation-iodolysis sequences using lithium 2,2,6,6-tetramethylpiperidide as the base and the corresponding zinc diamide as an in situ trap. The reactivity of the substrate was discussed in light of the calculated atomic charges and the pKa values. The behavior of the 1-arylated 7-azaindoles in direct iodination was then studied, and the results explained by considering the HOMO orbital coefficients and the atomic charges. Finally, some of the iodides generated, generally original, were involved in the N-arylation of indole. While crystallographic data were collected for fifteen of the synthesized compounds, biological properties (antimicrobial, antifungal and antioxidant activity) were evaluated for others.
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Affiliation(s)
- Mohamed Yacine Ameur Messaoud
- Institut des Sciences Chimiques de Rennes–UMR 6226, University of Rennes, CNRS, ISCR, 35000 Rennes, France; (M.Y.A.M.); (T.R.); (V.D.)
- Laboratoire de Synthèse Organique Appliquée, Faculté des Sciences Exactes et Appliquées, Université d’Oran 1 Ahmed Ben Bella, BP 1524 El M’Naouer, Oran 31000, Algeria
| | - Ghenia Bentabed-Ababsa
- Laboratoire de Synthèse Organique Appliquée, Faculté des Sciences Exactes et Appliquées, Université d’Oran 1 Ahmed Ben Bella, BP 1524 El M’Naouer, Oran 31000, Algeria
| | - Ziad Fajloun
- Laboratory of Applied Biotechnology (LBA3B), Azm Center for Research in Biotechnology and Its Applications, EDST, Lebanese University, Tripoli 1300, Lebanon
- Faculty of Sciences 3, Campus Michel Slayman, Lebanese University, Tripoli 1352, Lebanon
| | - Monzer Hamze
- Laboratoire Microbiologie, Santé et Environnement, Doctoral School of Sciences and Technology, Faculty of Public Health, Lebanese University, Tripoli 1300, Lebanon;
| | - Yury S. Halauko
- UNESCO Chair of Belarusian State University, 220030 Minsk, Belarus
| | - Oleg A. Ivashkevich
- Research Institute for Physico-Chemical Problems, Belarusian State University, 220030 Minsk, Belarus; (O.A.I.); (V.E.M.)
| | - Vadim E. Matulis
- Research Institute for Physico-Chemical Problems, Belarusian State University, 220030 Minsk, Belarus; (O.A.I.); (V.E.M.)
| | - Thierry Roisnel
- Institut des Sciences Chimiques de Rennes–UMR 6226, University of Rennes, CNRS, ISCR, 35000 Rennes, France; (M.Y.A.M.); (T.R.); (V.D.)
| | - Vincent Dorcet
- Institut des Sciences Chimiques de Rennes–UMR 6226, University of Rennes, CNRS, ISCR, 35000 Rennes, France; (M.Y.A.M.); (T.R.); (V.D.)
| | - Florence Mongin
- Institut des Sciences Chimiques de Rennes–UMR 6226, University of Rennes, CNRS, ISCR, 35000 Rennes, France; (M.Y.A.M.); (T.R.); (V.D.)
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2
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Yin K, Hua L, Qu L, Yao Q, Wang Y, Yuan D, You H, Yao Y. Heterobimetallic rare earth metal-zinc catalysts for reactions of epoxides and CO 2 under ambient conditions. Dalton Trans 2021; 50:1453-1464. [PMID: 33439163 DOI: 10.1039/d0dt03772a] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Four homodinuclear rare earth metal (RE) complexes 1-4 bearing a multidentate diglycolamine-bridged bis(phenolate) ligand were synthesized. In addition, seven heterobimetallic RE-Zn complexes 5-11 were prepared through a one-pot strategy. In these heterobimetallic complexes, two RE centers are bridged by either Zn(OAc)2 or Zn(OBn)2 moieties. All complexes were characterized by single crystal X-ray diffraction, elemental analysis, IR spectroscopy, and multinuclear NMR spectroscopy (in the case of diamagnetic complexes 1, 4, 7 and 11). Moreover, the multi-nuclear structures of complexes 4 and 11 in solution were also studied by 1H DOSY spectroscopy. These complexes were applied in catalyzing the coupling reaction of carbon dioxide (CO2) with epoxides. Zn(OAc)2- and Zn(OBn)2-bridged heterobimetallic complexes showed comparable catalytic activities under ambient conditions and were more active than monometallic RE complexes. Significant synergistic effect in heterobimetallic complexes is observed. Mono-substituted epoxides were converted into cyclic carbonates under 1 atm CO2 at 25 °C in 88-96% yields, whereas di-substituted epoxides reacted under 1 atm CO2 at higher temperatures in 40-80% yields.
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Affiliation(s)
- Kuan Yin
- Key Laboratory of Organic Synthesis of Jiangsu Province, College of Chemistry, Chemical Engineering and Materials Science, Dushu Lake Campus, Soochow University, Suzhou 215123, People's Republic of China.
| | - Linyan Hua
- Key Laboratory of Organic Synthesis of Jiangsu Province, College of Chemistry, Chemical Engineering and Materials Science, Dushu Lake Campus, Soochow University, Suzhou 215123, People's Republic of China.
| | - Liye Qu
- Key Laboratory of Organic Synthesis of Jiangsu Province, College of Chemistry, Chemical Engineering and Materials Science, Dushu Lake Campus, Soochow University, Suzhou 215123, People's Republic of China.
| | - Quanyou Yao
- Key Laboratory of Organic Synthesis of Jiangsu Province, College of Chemistry, Chemical Engineering and Materials Science, Dushu Lake Campus, Soochow University, Suzhou 215123, People's Republic of China.
| | - Yaorong Wang
- Key Laboratory of Organic Synthesis of Jiangsu Province, College of Chemistry, Chemical Engineering and Materials Science, Dushu Lake Campus, Soochow University, Suzhou 215123, People's Republic of China.
| | - Dan Yuan
- Key Laboratory of Organic Synthesis of Jiangsu Province, College of Chemistry, Chemical Engineering and Materials Science, Dushu Lake Campus, Soochow University, Suzhou 215123, People's Republic of China.
| | - Hongpeng You
- State Key Laboratory of Rare Earth Resource Utilization, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, People's Republic of China
| | - Yingming Yao
- Key Laboratory of Organic Synthesis of Jiangsu Province, College of Chemistry, Chemical Engineering and Materials Science, Dushu Lake Campus, Soochow University, Suzhou 215123, People's Republic of China. and State Key Laboratory of Rare Earth Resource Utilization, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, People's Republic of China
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3
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Dilchert K, Schmidt M, Großjohann A, Feichtner K, Mulvey RE, Gessner VH. Lösungsmitteleinflüsse auf die Struktur und Stabilität von Alkalimetallcarbenoiden. Angew Chem Int Ed Engl 2021. [DOI: 10.1002/ange.202011278] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Katharina Dilchert
- Lehrstuhl für Anorganische Chemie II Fakultät für Chemie und Biochemie Ruhr-Universität Bochum Universitätsstraße 150 44801 Bochum Deutschland
- WestCHEM Department of Pure and Applied Chemistry University of Strathclyde Glasgow G1 1XL UK
| | - Michelle Schmidt
- Lehrstuhl für Anorganische Chemie II Fakultät für Chemie und Biochemie Ruhr-Universität Bochum Universitätsstraße 150 44801 Bochum Deutschland
| | - Angela Großjohann
- Lehrstuhl für Anorganische Chemie II Fakultät für Chemie und Biochemie Ruhr-Universität Bochum Universitätsstraße 150 44801 Bochum Deutschland
| | - Kai‐Stephan Feichtner
- Lehrstuhl für Anorganische Chemie II Fakultät für Chemie und Biochemie Ruhr-Universität Bochum Universitätsstraße 150 44801 Bochum Deutschland
| | - Robert E. Mulvey
- WestCHEM Department of Pure and Applied Chemistry University of Strathclyde Glasgow G1 1XL UK
| | - Viktoria H. Gessner
- Lehrstuhl für Anorganische Chemie II Fakultät für Chemie und Biochemie Ruhr-Universität Bochum Universitätsstraße 150 44801 Bochum Deutschland
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4
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Dilchert K, Schmidt M, Großjohann A, Feichtner K, Mulvey RE, Gessner VH. Solvation Effects on the Structure and Stability of Alkali Metal Carbenoids. Angew Chem Int Ed Engl 2021; 60:493-498. [PMID: 33006796 PMCID: PMC7821203 DOI: 10.1002/anie.202011278] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/18/2020] [Indexed: 12/26/2022]
Abstract
s-Block metal carbenoids are carbene synthons and applied in a myriad of organic transformations. They exhibit a strong structure-activity relationship, but this is only poorly understood due to the challenging high reactivity and sensitivity of these reagents. Here, we report on systematic VT and DOSY NMR studies, XRD analyses as well as DFT calculations on a sulfoximinoyl-substituted model system to explain the pronounced solvent dependency of the carbenoid stability. While the sodium and potassium chloride carbenoids showed high stabilities independent of the solvent, the lithium carbenoid was stable at room temperature in THF but decomposed at -10 °C in toluene. These divergent stabilities could be explained by the different structures formed in solution. In contrast to simple organolithium reagents, the monomeric THF-solvate was found to be more stable than the dimer in toluene, since the latter more readily forms direct Li/Cl interactions which facilitate decomposition via α-elimination.
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Affiliation(s)
- Katharina Dilchert
- Chair of Inorganic Chemistry IIFaculty of Chemistry and BiochemistryRuhr-University BochumUniversitätsstraße 15044801BochumGermany
- WestCHEMDepartment of Pure and Applied ChemistryUniversity of StrathclydeGlasgowG1 1XLUK
| | - Michelle Schmidt
- Chair of Inorganic Chemistry IIFaculty of Chemistry and BiochemistryRuhr-University BochumUniversitätsstraße 15044801BochumGermany
| | - Angela Großjohann
- Chair of Inorganic Chemistry IIFaculty of Chemistry and BiochemistryRuhr-University BochumUniversitätsstraße 15044801BochumGermany
| | - Kai‐Stephan Feichtner
- Chair of Inorganic Chemistry IIFaculty of Chemistry and BiochemistryRuhr-University BochumUniversitätsstraße 15044801BochumGermany
| | - Robert E. Mulvey
- WestCHEMDepartment of Pure and Applied ChemistryUniversity of StrathclydeGlasgowG1 1XLUK
| | - Viktoria H. Gessner
- Chair of Inorganic Chemistry IIFaculty of Chemistry and BiochemistryRuhr-University BochumUniversitätsstraße 15044801BochumGermany
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5
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Dayaker G, Erb W, Hedidi M, Chevallier F, Blot M, Gros PC, Hilmersson G, Roisnel T, Dorcet V, Bentabed-Ababsa G, Mongin F. Enantioselective deprotometalation of alkyl ferrocenecarboxylates using bimetallic bases. NEW J CHEM 2021. [DOI: 10.1039/d1nj04526a] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
Our attempts to deprotometalate alkyl ferrocenecarboxylates enantioselectively by using chiral lithium–zinc or lithium–cadmium bases are reported.
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Affiliation(s)
- Gandrath Dayaker
- Univ Rennes, CNRS, ISCR (Institut des Sciences Chimiques de Rennes) – UMR 6226, Rennes F-35000, France
| | - William Erb
- Univ Rennes, CNRS, ISCR (Institut des Sciences Chimiques de Rennes) – UMR 6226, Rennes F-35000, France
| | - Madani Hedidi
- Univ Rennes, CNRS, ISCR (Institut des Sciences Chimiques de Rennes) – UMR 6226, Rennes F-35000, France
- Laboratoire de Synthèse Organique Appliquée, Faculté des Sciences Exactes et Appliquées, Université Oran1 Ahmed Ben Bella, BP 1524 El M’Naouer, Oran 31000, Algeria
| | - Floris Chevallier
- Univ Rennes, CNRS, ISCR (Institut des Sciences Chimiques de Rennes) – UMR 6226, Rennes F-35000, France
| | - Marielle Blot
- Univ Rennes, CNRS, ISCR (Institut des Sciences Chimiques de Rennes) – UMR 6226, Rennes F-35000, France
| | | | - Göran Hilmersson
- Department of Chemistry and Molecular Biology, Göteborg University, Göteborg 41296, Sweden
| | - Thierry Roisnel
- Univ Rennes, CNRS, ISCR (Institut des Sciences Chimiques de Rennes) – UMR 6226, Rennes F-35000, France
| | - Vincent Dorcet
- Univ Rennes, CNRS, ISCR (Institut des Sciences Chimiques de Rennes) – UMR 6226, Rennes F-35000, France
| | - Ghenia Bentabed-Ababsa
- Laboratoire de Synthèse Organique Appliquée, Faculté des Sciences Exactes et Appliquées, Université Oran1 Ahmed Ben Bella, BP 1524 El M’Naouer, Oran 31000, Algeria
| | - Florence Mongin
- Univ Rennes, CNRS, ISCR (Institut des Sciences Chimiques de Rennes) – UMR 6226, Rennes F-35000, France
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6
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Evans R. The interpretation of small molecule diffusion coefficients: Quantitative use of diffusion-ordered NMR spectroscopy. PROGRESS IN NUCLEAR MAGNETIC RESONANCE SPECTROSCOPY 2020; 117:33-69. [PMID: 32471534 DOI: 10.1016/j.pnmrs.2019.11.002] [Citation(s) in RCA: 25] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/21/2019] [Revised: 11/20/2019] [Accepted: 11/20/2019] [Indexed: 06/11/2023]
Abstract
Measuring accurate molecular self-diffusion coefficients, D, by nuclear magnetic resonance (NMR) techniques has become routine as hardware, software and experimental methodologies have all improved. However, the quantitative interpretation of such data remains difficult, particularly for small molecules. This review article first provides a description of, and explanation for, the failure of the Stokes-Einstein equation to accurately predict small molecule diffusion coefficients, before moving on to three broadly complementary methods for their quantitative interpretation. Two are based on power laws, but differ in the nature of the reference molecules used. The third addresses the uncertainties in the Stokes-Einstein equation directly. For all three methods, a wide range of examples are used to show the range of chemistry to which diffusion NMR can be applied, and how best to implement the different methods to obtain quantitative information from the chemical systems studied.
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Affiliation(s)
- Robert Evans
- Aston Institute of Materials Research, School of Engineering and Applied Science, Aston University, Birmingham B4 7ET, United Kingdom.
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7
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Espinosa-Jalapa NA, Berg N, Seidl M, Shenderovich IG, Gschwind RM, Bauer JO. Complexation behaviour of LiCl and LiPF6– model studies in the solid-state and in solution using a bidentate picolyl-based ligand. Chem Commun (Camb) 2020; 56:13335-13338. [DOI: 10.1039/d0cc05682k] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
Abstract
Using a new bulky bidentate ligand and combining various structure elucidation methods, coordination modes of [ligand·LiX] (X = Cl, PF6) complexes both in solid-state and in solution have been revealed.
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Affiliation(s)
- Noel Angel Espinosa-Jalapa
- Institut für Anorganische Chemie
- Fakultät für Chemie und Pharmazie
- Universität Regensburg
- D-93053 Regensburg
- Germany
| | - Nele Berg
- Institut für Organische Chemie
- Fakultät für Chemie und Pharmazie
- Universität Regensburg
- D-93053 Regensburg
- Germany
| | - Michael Seidl
- Institut für Anorganische Chemie
- Fakultät für Chemie und Pharmazie
- Universität Regensburg
- D-93053 Regensburg
- Germany
| | - Ilya G. Shenderovich
- Institut für Organische Chemie
- Fakultät für Chemie und Pharmazie
- Universität Regensburg
- D-93053 Regensburg
- Germany
| | - Ruth M. Gschwind
- Institut für Organische Chemie
- Fakultät für Chemie und Pharmazie
- Universität Regensburg
- D-93053 Regensburg
- Germany
| | - Jonathan O. Bauer
- Institut für Anorganische Chemie
- Fakultät für Chemie und Pharmazie
- Universität Regensburg
- D-93053 Regensburg
- Germany
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8
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From Quinoxaline, Pyrido[2,3- b]pyrazine and Pyrido[3,4- b]pyrazine to Pyrazino-Fused Carbazoles and Carbolines. Molecules 2018; 23:molecules23112961. [PMID: 30428591 PMCID: PMC6278407 DOI: 10.3390/molecules23112961] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/23/2018] [Revised: 11/09/2018] [Accepted: 11/11/2018] [Indexed: 11/17/2022] Open
Abstract
2,3-Diphenylated quinoxaline, pyrido[2,3-b]pyrazine and 8-bromopyrido[3,4-b]pyrazine were halogenated in deprotometalation-trapping reactions using mixed 2,2,6,6-tetramethyl piperidino-based lithium-zinc combinations in tetrahydrofuran. The 2,3-diphenylated 5-iodo- quinoxaline, 8-iodopyrido[2,3-b]pyrazine and 8-bromo-7-iodopyrido[3,4-b]pyrazine thus obtained were subjected to palladium-catalyzed couplings with arylboronic acids or anilines, and possible subsequent cyclizations to afford the corresponding pyrazino[2,3-a]carbazole, pyrazino[2',3':5,6] pyrido[4,3-b]indole and pyrazino[2',3':4,5]pyrido[2,3-d]indole, respectively. 8-Iodopyrido[2,3-b] pyrazine was subjected either to a copper-catalyzed C-N bond formation with azoles, or to direct substitution to introduce alkylamino, benzylamino, hydrazine and aryloxy groups at the 8 position. The 8-hydrazino product was converted into aryl hydrazones. Most of the compounds were evaluated for their biological properties (antiproliferative activity in A2058 melanoma cells and disease-relevant kinase inhibition).
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9
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Akimoto G, Otsuka M, Takita R, Uchiyama M, Hedidi M, Bentabed-Ababsa G, Lassagne F, Erb W, Mongin F. Deprotonative Metalation of Methoxy-Substituted Arenes Using Lithium 2,2,6,6-Tetramethylpiperidide: Experimental and Computational Study. J Org Chem 2018; 83:13498-13506. [PMID: 30345758 DOI: 10.1021/acs.joc.8b02397] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Abstract
The reaction pathways of lithium 2,2,6,6-tetramethylpiperidide (LiTMP)-mediated deprotonative metalation of methoxy-substituted arenes were investigated. Importantly, it was experimentally observed that, whereas TMEDA has no effect on the course of the reactions, the presence of more than the stoichiometric amount of LiCl is deleterious, in particular without an in situ trap. These effects were corroborated by the DFT calculations. The reaction mechanisms, such as the structure of the active species in the deprotonation event, the reaction pathways by each postulated LiTMP complex, the stabilization effects by in situ trapping using zinc species, and some kinetic interpretation, are discussed herein.
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Affiliation(s)
- Gaku Akimoto
- Graduate School of Pharmaceutical Sciences , The University of Tokyo , 7-3-1 Hongo , Bunkyo-ku, Tokyo 113-0033 , Japan.,Advanced Elements Chemistry Research Team, RIKEN Center for Sustainable Resource Science, and Elements Chemistry Laboratory , RIKEN , 2-1 Hirosawa , Wako-shi, Saitama 351-0198 , Japan
| | - Mai Otsuka
- Graduate School of Pharmaceutical Sciences , The University of Tokyo , 7-3-1 Hongo , Bunkyo-ku, Tokyo 113-0033 , Japan.,Advanced Elements Chemistry Research Team, RIKEN Center for Sustainable Resource Science, and Elements Chemistry Laboratory , RIKEN , 2-1 Hirosawa , Wako-shi, Saitama 351-0198 , Japan
| | - Ryo Takita
- Graduate School of Pharmaceutical Sciences , The University of Tokyo , 7-3-1 Hongo , Bunkyo-ku, Tokyo 113-0033 , Japan.,Advanced Elements Chemistry Research Team, RIKEN Center for Sustainable Resource Science, and Elements Chemistry Laboratory , RIKEN , 2-1 Hirosawa , Wako-shi, Saitama 351-0198 , Japan
| | - Masanobu Uchiyama
- Graduate School of Pharmaceutical Sciences , The University of Tokyo , 7-3-1 Hongo , Bunkyo-ku, Tokyo 113-0033 , Japan.,Advanced Elements Chemistry Research Team, RIKEN Center for Sustainable Resource Science, and Elements Chemistry Laboratory , RIKEN , 2-1 Hirosawa , Wako-shi, Saitama 351-0198 , Japan
| | - Madani Hedidi
- Univ Rennes, CNRS , ISCR (Institut des Sciences Chimiques de Rennes) - UMR 6226, F-35000 Rennes , France.,Laboratoire de Synthèse Organique Appliquée, Faculté des Sciences Exactes et Appliquées , Université Oran 1 Ahmed Ben Bella , BP 1524 El M'Naouer, 31000 Oran , Algeria
| | - Ghenia Bentabed-Ababsa
- Laboratoire de Synthèse Organique Appliquée, Faculté des Sciences Exactes et Appliquées , Université Oran 1 Ahmed Ben Bella , BP 1524 El M'Naouer, 31000 Oran , Algeria
| | - Frédéric Lassagne
- Univ Rennes, CNRS , ISCR (Institut des Sciences Chimiques de Rennes) - UMR 6226, F-35000 Rennes , France
| | - William Erb
- Univ Rennes, CNRS , ISCR (Institut des Sciences Chimiques de Rennes) - UMR 6226, F-35000 Rennes , France
| | - Florence Mongin
- Univ Rennes, CNRS , ISCR (Institut des Sciences Chimiques de Rennes) - UMR 6226, F-35000 Rennes , France
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10
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Bisballe N, Hedidi M, Demmer CS, Chevallier F, Roisnel T, Dorcet V, Halauko YS, Ivashkevich OA, Matulis VE, Bentabed-Ababsa G, Bunch L, Mongin F. Functionalization of Oxazolo[4,5- b
]pyrazines by Deprotometallation. European J Org Chem 2018. [DOI: 10.1002/ejoc.201800481] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Niels Bisballe
- Univ Rennes, CNRS; ISCR (Institut des Sciences Chimiques de Rennes) - UMR 6226; 35000 Rennes France
- Department of Drug Design and Pharmacology; Faculty of Health and Medical Sciences; University of Copenhagen; Universitetsparken 2 2100 Copenhagen Denmark
| | - Madani Hedidi
- Univ Rennes, CNRS; ISCR (Institut des Sciences Chimiques de Rennes) - UMR 6226; 35000 Rennes France
- Laboratoire de Synthèse Organique Appliquée; Faculté des Sciences Exactes et Appliquées; Université d'Oran; 1 Ahmed Ben Bella 31000 Oran Algeria
| | - Charles S. Demmer
- Department of Drug Design and Pharmacology; Faculty of Health and Medical Sciences; University of Copenhagen; Universitetsparken 2 2100 Copenhagen Denmark
| | - Floris Chevallier
- Univ Rennes, CNRS; ISCR (Institut des Sciences Chimiques de Rennes) - UMR 6226; 35000 Rennes France
| | - Thierry Roisnel
- Univ Rennes, CNRS; ISCR (Institut des Sciences Chimiques de Rennes) - UMR 6226; 35000 Rennes France
| | - Vincent Dorcet
- Univ Rennes, CNRS; ISCR (Institut des Sciences Chimiques de Rennes) - UMR 6226; 35000 Rennes France
| | - Yury S. Halauko
- UNESCO Chair of Belarusian State University; 14 Leningradskaya Str. 220030 Minsk Belarus
| | - Oleg A. Ivashkevich
- UNESCO Chair of Belarusian State University; 14 Leningradskaya Str. 220030 Minsk Belarus
| | - Vadim E. Matulis
- Research Institute for Physico-Chemical Problems of Belarusian State University; 14 Leningradskaya Str. 220030 Minsk Belarus
| | - Ghenia Bentabed-Ababsa
- Laboratoire de Synthèse Organique Appliquée; Faculté des Sciences Exactes et Appliquées; Université d'Oran; 1 Ahmed Ben Bella 31000 Oran Algeria
| | - Lennart Bunch
- Department of Drug Design and Pharmacology; Faculty of Health and Medical Sciences; University of Copenhagen; Universitetsparken 2 2100 Copenhagen Denmark
| | - Florence Mongin
- Univ Rennes, CNRS; ISCR (Institut des Sciences Chimiques de Rennes) - UMR 6226; 35000 Rennes France
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11
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Hamdoun G, Guduff L, van Heijenoort C, Bour C, Gandon V, Dumez JN. Spatially encoded diffusion-ordered NMR spectroscopy of reaction mixtures in organic solvents. Analyst 2018; 143:3458-3464. [DOI: 10.1039/c8an00434j] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/16/2023]
Abstract
Using a spatial encoding of the diffusion dimension, DOSY NMR data are acquired in less than one second for reaction mixtures in organic solvents.
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Affiliation(s)
- Ghanem Hamdoun
- Institut de Chimie des Substances Naturelles
- CNRS UPR2301
- Univ. Paris Sud
- Université Paris-Saclay
- 91190 Gif-Sur-Yvette
| | - Ludmilla Guduff
- Institut de Chimie des Substances Naturelles
- CNRS UPR2301
- Univ. Paris Sud
- Université Paris-Saclay
- 91190 Gif-Sur-Yvette
| | - Carine van Heijenoort
- Institut de Chimie des Substances Naturelles
- CNRS UPR2301
- Univ. Paris Sud
- Université Paris-Saclay
- 91190 Gif-Sur-Yvette
| | - Christophe Bour
- Institut de Chimie Moléculaire et des Matériaux d'Orsay
- CNRS UMR 8182
- Univ. Paris Sud
- Université Paris-Saclay
- 91405 Orsay
| | - Vincent Gandon
- Institut de Chimie Moléculaire et des Matériaux d'Orsay
- CNRS UMR 8182
- Univ. Paris Sud
- Université Paris-Saclay
- 91405 Orsay
| | - Jean-Nicolas Dumez
- Institut de Chimie des Substances Naturelles
- CNRS UPR2301
- Univ. Paris Sud
- Université Paris-Saclay
- 91190 Gif-Sur-Yvette
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12
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Tazi M, Erb W, Halauko YS, Ivashkevich OA, Matulis VE, Roisnel T, Dorcet V, Mongin F. From 2- to 3-Substituted Ferrocene Carboxamides or How to Apply Halogen “Dance” to the Ferrocene Series. Organometallics 2017. [DOI: 10.1021/acs.organomet.7b00659] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Affiliation(s)
- Mehdi Tazi
- Equipe
Chimie Organique et Interfaces, Institut des Sciences Chimiques de Rennes, UMR 6226 CNRS-Université de Rennes 1, Bâtiment 10A, Case
1003, Campus Scientifique de Beaulieu, 35042 Cedex Rennes, France
| | - William Erb
- Equipe
Chimie Organique et Interfaces, Institut des Sciences Chimiques de Rennes, UMR 6226 CNRS-Université de Rennes 1, Bâtiment 10A, Case
1003, Campus Scientifique de Beaulieu, 35042 Cedex Rennes, France
| | - Yury S. Halauko
- UNESCO
Chair of Belarusian State University, 14 Leningradskaya Str., Minsk 220030, Belarus
| | - Oleg A. Ivashkevich
- UNESCO
Chair of Belarusian State University, 14 Leningradskaya Str., Minsk 220030, Belarus
| | - Vadim E. Matulis
- Research
Institute for Physico-Chemical Problems of Belarusian State University, 14 Leningradskaya Str., Minsk 220030, Belarus
| | - Thierry Roisnel
- Centre
de Diffractométrie X, Institut des Sciences Chimiques de Rennes, UMR 6226 CNRS-Université de Rennes 1, Bâtiment 10B, Campus de Beaulieu, 35042 Cedex Rennes, France
| | - Vincent Dorcet
- Centre
de Diffractométrie X, Institut des Sciences Chimiques de Rennes, UMR 6226 CNRS-Université de Rennes 1, Bâtiment 10B, Campus de Beaulieu, 35042 Cedex Rennes, France
| | - Florence Mongin
- Equipe
Chimie Organique et Interfaces, Institut des Sciences Chimiques de Rennes, UMR 6226 CNRS-Université de Rennes 1, Bâtiment 10A, Case
1003, Campus Scientifique de Beaulieu, 35042 Cedex Rennes, France
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13
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Fused Systems Based on 2-Aminopyrimidines: Synthesis Combining Deprotolithiation-in situ Zincation withN-Arylation Reactions and Biological Properties. European J Org Chem 2017. [DOI: 10.1002/ejoc.201701004] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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14
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Barozzino-Consiglio G, Hamdoun G, Fressigné C, Harrison-Marchand A, Maddaluno J, Oulyadi H. A Combined 1
H/6
Li NMR DOSY Strategy Finally Uncovers the Structure of Isopropyllithium in THF. Chemistry 2017; 23:12475-12479. [DOI: 10.1002/chem.201702990] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/29/2017] [Indexed: 11/09/2022]
Affiliation(s)
| | - Ghanem Hamdoun
- Normandie Université, UNIROUEN, INSA de Rouen, CNRS; Laboratoire COBRA (UMR 6014 & FR 3038); 76000 Rouen France
| | - Catherine Fressigné
- Normandie Université, UNIROUEN, INSA de Rouen, CNRS; Laboratoire COBRA (UMR 6014 & FR 3038); 76000 Rouen France
| | - Anne Harrison-Marchand
- Normandie Université, UNIROUEN, INSA de Rouen, CNRS; Laboratoire COBRA (UMR 6014 & FR 3038); 76000 Rouen France
| | - Jacques Maddaluno
- Normandie Université, UNIROUEN, INSA de Rouen, CNRS; Laboratoire COBRA (UMR 6014 & FR 3038); 76000 Rouen France
| | - Hassan Oulyadi
- Normandie Université, UNIROUEN, INSA de Rouen, CNRS; Laboratoire COBRA (UMR 6014 & FR 3038); 76000 Rouen France
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15
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Campbell R, Kennedy AR, McLellan R, Robertson SD, Sproules S, Mulvey RE. Contrasting the group 6 metal-metal bonding in sodium dichromate(ii) and sodium dimolybdate(ii) polymethyl complexes: synthetic, X-ray crystallographic and theoretical studies. Dalton Trans 2017; 46:5650-5659. [PMID: 28145549 DOI: 10.1039/c6dt04644d] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
Extending the class of group 6 metal-metal bonded methylate compounds supported by alkali metal counter-ions, the first sodium octamethylmolybdate(ii) complex [(TMEDA)Na]4Mo2Me8 and heptamethylchromate(ii) relations [(donor)Na]3Cr2Me7 (donor is TMEDA or TMCDA) are reported. The former was made by treating [(Et2O)Li]4Mo2Me8 with four equivalents of NaOtBu/TMEDA in ether; whereas the latter resulted from introducing TMEDA or TMCDA to ether solutions of octamethyldichromate [(Et2O)Na]4Cr2Me8. X-ray crystallography revealed [(TMEDA)Na]4Mo2Me8 is dimeric with square pyramidal Mo centres [including a short Mo-Mo interaction of 2.1403(3) Å] each with four methyl groups in a mutually eclipsed conformation. In dinuclear [(TMCDA)Na]3Cr2Me7 trigonal bi-pyramidal Cr centres each bond to three terminal methyl groups and one common Me bridge, that produces a strikingly short Cr-Cr contact of 1.9136(4) Å. Broken symmetry density functional theoretical calculations expose the multiconfigurational metal-metal bonding in these compounds with a Mo-Mo bond order of 3 computed for octamethylmolybdate(ii). This is contrasted by the single Cr-Cr bond in heptamethylchromate(ii) where the singlet ground state is derived by strong antiferromagnetic coupling between adjacent metal ions.
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Affiliation(s)
- Ross Campbell
- WestCHEM, Department of Pure and Applied Chemistry, University of Strathclyde, Glasgow, G1 1XL, UK.
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16
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Morisako S, Shang R, Yamamoto Y. Synthesis of a Sterically Demanding Dispiropiperidine and Its Application in Monoamidodialkyl Zincate Complexes. Inorg Chem 2016; 55:10767-10773. [PMID: 27682309 DOI: 10.1021/acs.inorgchem.6b01965] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
The new sterically hindered piperidine analog, dispiro[cyclohexane-2,2'-piperidine-6',2″-cyclohexane] (CPC(H), 2), and its N-methylated derivative CPC(Me) (3) were synthesized from commercially available starting materials in short steps. The N-lithiated amide LiCPC (4) was also isolated from 2 as a cyclictrimer in single crystals and showed slightly larger steric hindrance than that of lithium 2,2,6,6-tetramethylpiperidide (LiTMP) in the competitive methylation reaction with methyl trifluoromethanesulfonate. In addition, the heterobimetallic heteroleptic zincate complexes [Li(μ-NR2)(μ-Et)Zn(Et)] (NR2 = CPC, 5, and NR2 = TMP, 6) were obtained as THF- and TMEDA-coordinated monomer 5·(THF)2, 6·(THF)2, 5·TMEDA, and 6·TMEDA (THF = tetrahydrofuran, TMEDA = N,N,N',N'-tetramethylethylenediamine). These molecular structures bearing different amido ligands in single crystals showed little structural differences from crystallographic studies. Diffusion-ordered spectroscopy (DOSY) revealed that the solution structures of the zincate complexes 5·(THF)2 and 6·(THF)2 only differ in the number of coordination THF molecules. In the deprotonation reactions with tert-butyl 3-bromobenzoate, the zincate complexes containing the CPC ligand [Li(μ-CPC)(μ-R)Zn(R)] (R = Et (5), tBu) showed moderately improved regioselectivity for the 6 position in comparison to those containing the TMP ligand [Li(μ-TMP)(μ-R)Zn(R)] (R = Et (6), tBu).
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Affiliation(s)
- Shogo Morisako
- Department of Chemistry, Graduate School of Science, Hiroshima University , 1-3-1 Kagamiyama, Higashi-Hiroshima 739-8526, Japan
| | - Rong Shang
- Department of Chemistry, Graduate School of Science, Hiroshima University , 1-3-1 Kagamiyama, Higashi-Hiroshima 739-8526, Japan
| | - Yohsuke Yamamoto
- Department of Chemistry, Graduate School of Science, Hiroshima University , 1-3-1 Kagamiyama, Higashi-Hiroshima 739-8526, Japan
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17
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Fuentes MÁ, Zabala A, Kennedy AR, Mulvey RE. Structural Diversity in Alkali Metal and Alkali Metal Magnesiate Chemistry of the Bulky 2,6-Diisopropyl-N-(trimethylsilyl)anilino Ligand. Chemistry 2016; 22:14968-14978. [PMID: 27573676 PMCID: PMC5096043 DOI: 10.1002/chem.201602683] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/06/2016] [Indexed: 11/07/2022]
Abstract
Bulky amido ligands are precious in s-block chemistry, since they can implant complementary strong basic and weak nucleophilic properties within compounds. Recent work has shown the pivotal importance of the base structure with enhancement of basicity and extraordinary regioselectivities possible for cyclic alkali metal magnesiates containing mixed n-butyl/amido ligand sets. This work advances alkali metal and alkali metal magnesiate chemistry of the bulky arylsilyl amido ligand [N(SiMe3 )(Dipp)]- (Dipp=2,6-iPr2 -C6 H3 ). Infinite chain structures of the parent sodium and potassium amides are disclosed, adding to the few known crystallographically characterised unsolvated s-block metal amides. Solvation by N,N,N',N'',N''-pentamethyldiethylenetriamine (PMDETA) or N,N,N',N'-tetramethylethylenediamine (TMEDA) gives molecular variants of the lithium and sodium amides; whereas for potassium, PMDETA gives a molecular structure, TMEDA affords a novel, hemi-solvated infinite chain. Crystal structures of the first magnesiate examples of this amide in [MMg{N(SiMe3 )(Dipp)}2 (μ-nBu)]∞ (M=Na or K) are also revealed, though these breakdown to their homometallic components in donor solvents as revealed through NMR and DOSY studies.
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Affiliation(s)
- M Ángeles Fuentes
- WestCHEM, Department of Pure and Applied Chemistry, University of Strathclyde, Glasgow, G1 1XL, UK
| | - Andoni Zabala
- WestCHEM, Department of Pure and Applied Chemistry, University of Strathclyde, Glasgow, G1 1XL, UK
| | - Alan R Kennedy
- WestCHEM, Department of Pure and Applied Chemistry, University of Strathclyde, Glasgow, G1 1XL, UK
| | - Robert E Mulvey
- WestCHEM, Department of Pure and Applied Chemistry, University of Strathclyde, Glasgow, G1 1XL, UK.
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18
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Hedidi M, Erb W, Bentabed-Ababsa G, Chevallier F, Picot L, Thiéry V, Bach S, Ruchaud S, Roisnel T, Dorcet V, Mongin F. Synthesis of N-pyridyl azoles using a deprotometalation-iodolysis-N-arylation sequence and evaluation of their antiproliferative activity in melanoma cells. Tetrahedron 2016. [DOI: 10.1016/j.tet.2016.08.056] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
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19
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Schnegelsberg C, Bachmann S, Kolter M, Auth T, John M, Stalke D, Koszinowski K. Association and Dissociation of Grignard Reagents RMgCl and Their Turbo Variant RMgCl⋅LiCl. Chemistry 2016; 22:7752-62. [DOI: 10.1002/chem.201600699] [Citation(s) in RCA: 37] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/15/2016] [Indexed: 11/10/2022]
Affiliation(s)
- Christoph Schnegelsberg
- Institut für Organische und Biomolekulare Chemie; Georg-August-Universität Göttingen; Tammannstraße 2 37077 Göttingen Germany
| | - Sebastian Bachmann
- Institut für Anorganische Chemie; Georg-August-Universität Göttingen; Tammannstraße 4 37077 Göttingen Germany
| | - Marlene Kolter
- Institut für Organische und Biomolekulare Chemie; Georg-August-Universität Göttingen; Tammannstraße 2 37077 Göttingen Germany
| | - Thomas Auth
- Institut für Organische und Biomolekulare Chemie; Georg-August-Universität Göttingen; Tammannstraße 2 37077 Göttingen Germany
| | - Michael John
- Institut für Organische und Biomolekulare Chemie; Georg-August-Universität Göttingen; Tammannstraße 2 37077 Göttingen Germany
| | - Dietmar Stalke
- Institut für Anorganische Chemie; Georg-August-Universität Göttingen; Tammannstraße 4 37077 Göttingen Germany
| | - Konrad Koszinowski
- Institut für Organische und Biomolekulare Chemie; Georg-August-Universität Göttingen; Tammannstraße 2 37077 Göttingen Germany
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20
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Deprotometalation of substituted pyridines and regioselectivity-computed CH acidity relationships. Tetrahedron 2016. [DOI: 10.1016/j.tet.2016.03.022] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
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21
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Becker MR, Knochel P. High-Temperature Continuous-Flow Zincations of Functionalized Arenes and Heteroarenes Using (Cy2N)2Zn·2LiCl. Org Lett 2016; 18:1462-5. [DOI: 10.1021/acs.orglett.6b00408] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Affiliation(s)
- Matthias R. Becker
- Department
of Chemistry, Ludwig-Maximilians-Universität, Butenandtstrasse 5-13, 81377 Munich, Germany
| | - Paul Knochel
- Department
of Chemistry, Ludwig-Maximilians-Universität, Butenandtstrasse 5-13, 81377 Munich, Germany
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22
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Hedidi M, Erb W, Lassagne F, Halauko YS, Ivashkevich OA, Matulis VE, Roisnel T, Bentabed-Ababsa G, Mongin F. Functionalization of pyridyl ketones using deprotolithiation-in situ zincation. RSC Adv 2016. [DOI: 10.1039/c6ra11370b] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022] Open
Abstract
Metallation of aryl ketones was achieved by using LiTMP in the presence of ZnCl2·TMEDA, as evidenced by subsequent interception with iodine or by palladium-catalysed cross-coupling reaction.
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Affiliation(s)
- Madani Hedidi
- Chimie et Photonique Moléculaires
- Institut des Sciences Chimiques de Rennes
- UMR 6226
- Université de Rennes 1-CNRS
- 35042 Rennes
| | - William Erb
- Chimie et Photonique Moléculaires
- Institut des Sciences Chimiques de Rennes
- UMR 6226
- Université de Rennes 1-CNRS
- 35042 Rennes
| | - Frédéric Lassagne
- Chimie et Photonique Moléculaires
- Institut des Sciences Chimiques de Rennes
- UMR 6226
- Université de Rennes 1-CNRS
- 35042 Rennes
| | - Yury S. Halauko
- UNESCO Chair of Belarusian State University
- Minsk 220030
- Belarus
| | | | - Vadim E. Matulis
- Research Institute for Physico-Chemical Problems of Belarusian State University
- Minsk 220030
- Belarus
| | - Thierry Roisnel
- Centre de Diffractométrie X
- Institut des Sciences Chimiques de Rennes
- UMR 6226
- Université de Rennes 1-CNRS
- 35042 Rennes
| | - Ghenia Bentabed-Ababsa
- Laboratoire de Synthèse Organique Appliquée
- Faculté des Sciences
- Université d'Oran 1 Ahmed Ben Bella
- 31000 Oran
- Algeria
| | - Florence Mongin
- Chimie et Photonique Moléculaires
- Institut des Sciences Chimiques de Rennes
- UMR 6226
- Université de Rennes 1-CNRS
- 35042 Rennes
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23
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Becker MR, Ganiek MA, Knochel P. Practical and economic lithiations of functionalized arenes and heteroarenes using Cy 2NLi in the presence of Mg, Zn or La halides in a continuous flow. Chem Sci 2015; 6:6649-6653. [PMID: 29435214 PMCID: PMC5802273 DOI: 10.1039/c5sc02558c] [Citation(s) in RCA: 35] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/15/2015] [Accepted: 08/10/2015] [Indexed: 02/03/2023] Open
Abstract
The economic amide base lithium dicyclohexylamide (Cy2NLi) allows fast and convenient (40 s, 0 °C) in situ trapping flow metalations of a broad range of functionalized arenes, heteroarenes and acrylate derivatives in the presence of various metal salts (ZnCl2·2LiCl, MgCl2, LaCl3·2LiCl). The resulting Zn-, Mg- or La-organometallic intermediates are trapped with various electrophiles in high yields. These flow metalations are easily scaled-up without further optimization.
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Affiliation(s)
- Matthias R Becker
- Ludwig-Maximilians-Universität München , Department Chemie , Butenandtstrasse 5-13 (Haus F) , 81377 München , Germany .
| | - Maximilian A Ganiek
- Ludwig-Maximilians-Universität München , Department Chemie , Butenandtstrasse 5-13 (Haus F) , 81377 München , Germany .
| | - Paul Knochel
- Ludwig-Maximilians-Universität München , Department Chemie , Butenandtstrasse 5-13 (Haus F) , 81377 München , Germany .
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24
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Fuentes MÁ, Kennedy AR, Mulvey RE, Parkinson JA, Rantanen T, Robertson SD, Snieckus V. Adding a Structural Context to the Deprotometalation and Trans-Metal Trapping Chemistry of Phenyl-Substituted Benzotriazole. Chemistry 2015; 21:14812-22. [DOI: 10.1002/chem.201502534] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/29/2015] [Indexed: 11/06/2022]
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25
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Deprotometalation-iodolysis and computed CH acidity of 1,2,3- and 1,2,4-triazoles. Application to the synthesis of resveratrol analogues. Bioorg Med Chem 2015; 23:6355-63. [PMID: 26344592 DOI: 10.1016/j.bmc.2015.08.031] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/03/2015] [Revised: 07/30/2015] [Accepted: 08/25/2015] [Indexed: 12/25/2022]
Abstract
1-Aryl- and 2-aryl-1,2,3-triazoles were synthesized by N-arylation of the corresponding azoles using aryl iodides. The deprotometalations of 1-phenyl-1,2,3-triazole and -1,2,4-triazole were performed using a 2,2,6,6-tetramethylpiperidino-based mixed lithium-zinc combination and occurred at the most acidic site, affording by iodolysis the 5-substituted derivatives. Dideprotonation was noted from 1-(2-thienyl)-1,2,4-triazole by increasing the amount of base. From 2-phenyl-1,2,3-triazoles, and in particular from 2-(4-trifluoromethoxy)phenyl-1,2,3-triazole, reactions at the 4 position of the triazolyl, but also ortho to the triazolyl on the phenyl group, were observed. The results were analyzed with the help of the CH acidities of the substrates, determined in THF solution using the DFT B3LYP method. 4-Iodo-2-phenyl-1,2,3-triazole and 4-iodo-2-(2-iodophenyl)-1,2,3-triazole were next involved in Suzuki coupling reactions to furnish the corresponding 4-arylated and 4,2'-diarylated derivatives. When evaluated for biological activities, the latter (which are resveratrol analogues) showed moderate antibacterial activity and promising antiproliferative effect against MDA-MB-231 cell line.
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26
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Messaoud MYA, Bentabed-Ababsa G, Hedidi M, Derdour A, Chevallier F, Halauko YS, Ivashkevich OA, Matulis VE, Picot L, Thiéry V, Roisnel T, Dorcet V, Mongin F. Deproto-metallation of N-arylated pyrroles and indoles using a mixed lithium-zinc base and regioselectivity-computed CH acidity relationship. Beilstein J Org Chem 2015; 11:1475-85. [PMID: 26425204 PMCID: PMC4578368 DOI: 10.3762/bjoc.11.160] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/21/2015] [Accepted: 07/31/2015] [Indexed: 01/23/2023] Open
Abstract
The synthesis of N-arylated pyrroles and indoles is documented, as well as their functionalization by deprotonative metallation using the base in situ prepared from LiTMP and ZnCl2·TMEDA (1/3 equiv). With N-phenylpyrrole and -indole, the reactions were carried out in hexane containing TMEDA which regioselectively afforded the 2-iodo derivatives after subsequent iodolysis. With pyrroles and indoles bearing N-substituents such as 2-thienyl, 3-pyridyl, 4-methoxyphenyl and 4-bromophenyl, the reactions all took place on the substituent, at the position either adjacent to the heteroatom (S, N) or ortho to the heteroatom-containing substituent (OMe, Br). The CH acidities of the substrates were determined in THF solution using the DFT B3LYP method in order to rationalize the experimental results.
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Affiliation(s)
- Mohamed Yacine Ameur Messaoud
- Equipe Chimie et Photonique Moléculaires, Institut des Sciences Chimiques de Rennes, UMR 6226, CNRS-Université de Rennes 1, Bâtiment 10A, Case 1003, Campus de Beaulieu, 35042 Rennes, France ; Laboratoire de Synthèse Organique Appliquée, Faculté des Sciences, Université d'Oran 1 Ahmed Ben Bella, BP 1524 El M'Naouer, 31000 Oran, Algeria
| | - Ghenia Bentabed-Ababsa
- Laboratoire de Synthèse Organique Appliquée, Faculté des Sciences, Université d'Oran 1 Ahmed Ben Bella, BP 1524 El M'Naouer, 31000 Oran, Algeria
| | - Madani Hedidi
- Equipe Chimie et Photonique Moléculaires, Institut des Sciences Chimiques de Rennes, UMR 6226, CNRS-Université de Rennes 1, Bâtiment 10A, Case 1003, Campus de Beaulieu, 35042 Rennes, France ; Laboratoire de Synthèse Organique Appliquée, Faculté des Sciences, Université d'Oran 1 Ahmed Ben Bella, BP 1524 El M'Naouer, 31000 Oran, Algeria
| | - Aïcha Derdour
- Laboratoire de Synthèse Organique Appliquée, Faculté des Sciences, Université d'Oran 1 Ahmed Ben Bella, BP 1524 El M'Naouer, 31000 Oran, Algeria
| | - Floris Chevallier
- Equipe Chimie et Photonique Moléculaires, Institut des Sciences Chimiques de Rennes, UMR 6226, CNRS-Université de Rennes 1, Bâtiment 10A, Case 1003, Campus de Beaulieu, 35042 Rennes, France
| | - Yury S Halauko
- UNESCO Chair of Belarusian State University, 14 Leningradskaya Str., Minsk, 220030, Belarus
| | - Oleg A Ivashkevich
- UNESCO Chair of Belarusian State University, 14 Leningradskaya Str., Minsk, 220030, Belarus
| | - Vadim E Matulis
- Research Institute for Physico-Chemical Problems of Belarusian State University, 14 Leningradskaya Str., Minsk, 220030, Belarus
| | - Laurent Picot
- Laboratoire Littoral Environnement et Sociétés, UMRi CNRS 7266, Université de La Rochelle, 17042 La Rochelle, France
| | - Valérie Thiéry
- Laboratoire Littoral Environnement et Sociétés, UMRi CNRS 7266, Université de La Rochelle, 17042 La Rochelle, France
| | - Thierry Roisnel
- Centre de Diffractométrie X, Institut des Sciences Chimiques de Rennes, UMR 6226, CNRS-Université de Rennes 1, Bâtiment 10B, Campus de Beaulieu, 35042 Rennes, France
| | - Vincent Dorcet
- Centre de Diffractométrie X, Institut des Sciences Chimiques de Rennes, UMR 6226, CNRS-Université de Rennes 1, Bâtiment 10B, Campus de Beaulieu, 35042 Rennes, France
| | - Florence Mongin
- Equipe Chimie et Photonique Moléculaires, Institut des Sciences Chimiques de Rennes, UMR 6226, CNRS-Université de Rennes 1, Bâtiment 10A, Case 1003, Campus de Beaulieu, 35042 Rennes, France
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27
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Neufeld R, John M, Stalke D. The Donor-Base-Free Aggregation of Lithium Diisopropyl Amide in Hydrocarbons Revealed by a DOSY Method. Angew Chem Int Ed Engl 2015; 54:6994-8. [PMID: 26014367 DOI: 10.1002/anie.201502576] [Citation(s) in RCA: 46] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/19/2015] [Indexed: 11/08/2022]
Abstract
Lithium diisopropyl amide (LDA) is a very prominent reagent that plays a key role in organic synthesis, serving as a base par excellence for a broad range of deprotonation reactions. However, the state of aggregation in solution in the absence of donor bases was unclear. In this paper we solved this problem by employing DOSY NMR experiments based on a newly elaborated external calibration curve (ECC) approach with normalized diffusion coefficients.
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Affiliation(s)
- Roman Neufeld
- Institut für Anorganische Chemie, Georg-August-Universität, Tammannstrasse 4, 37077 Göttingen (Germany)
| | - Michael John
- Institut für Anorganische Chemie, Georg-August-Universität, Tammannstrasse 4, 37077 Göttingen (Germany)
| | - Dietmar Stalke
- Institut für Anorganische Chemie, Georg-August-Universität, Tammannstrasse 4, 37077 Göttingen (Germany).
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28
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Neufeld R, John M, Stalke D. Aufklärung der donorbasenfreien Aggregation von Lithiumdiisopropylamid in Kohlenwasserstoffen mithilfe einer DOSY-Methode. Angew Chem Int Ed Engl 2015. [DOI: 10.1002/ange.201502576] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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Ludwig G, Ströhl D, Schmidt H, Steinborn D. [Li2{CH2S(O)Ph}2(TMEDA)2] – An α-sulfinyl-functionalized methyllithium carbenoid. Inorganica Chim Acta 2015. [DOI: 10.1016/j.ica.2015.01.034] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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30
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Khairallah GN, da Silva G, O'Hair RAJ. Molecular salt effects in the gas phase: tuning the kinetic basicity of [HCCLiCl]⁻ and [HCCMgCl₂]⁻ by LiCl and MgCl₂. Angew Chem Int Ed Engl 2014; 53:10979-83. [PMID: 25079912 DOI: 10.1002/anie.201404362] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/16/2014] [Revised: 06/11/2014] [Indexed: 11/09/2022]
Abstract
A combination of gas-phase ion-molecule reaction experiments and theoretical kinetic modeling is used to examine how a salt can influence the kinetic basicity of organometallates reacting with water. [HC≡CLiCl](-) reacts with water more rapidly than [HC≡CMgCl2](-), consistent with the higher reactivity of organolithium versus organomagnesium reagents. Addition of LiCl to [HC≡CLiCl](-) or [HC≡CMgCl2](-) enhances their reactivity towards water by a factor of about 2, while addition of MgCl2 to [HC≡CMgCl2](-) enhances its reactivity by a factor of about 4. Ab initio calculations coupled with master equation/RRKM theory kinetic modeling show that these reactions proceed via a mechanism involving formation of a water adduct followed by rearrangement, proton transfer, and acetylene elimination as either discrete or concerted steps. Both the energy and entropy requirements for these elementary steps need to be considered in order to explain the observed kinetics.
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Affiliation(s)
- George N Khairallah
- School of Chemistry and Bio21 Institute, University of Melbourne, Melbourne, Victoria 3010 (Australia); ARC Centre of Excellence for Free-Radical Chemistry and Biotechnology.
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Khairallah GN, da Silva G, O'Hair RAJ. Molecular Salt Effects in the Gas Phase: Tuning the Kinetic Basicity of [HCCLiCl]−and [HCCMgCl2]−by LiCl and MgCl2. Angew Chem Int Ed Engl 2014. [DOI: 10.1002/ange.201404362] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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32
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Francos J, Fleming BJ, García-Álvarez P, Kennedy AR, Reilly K, Robertson GM, Robertson SD, O'Hara CT. Complexity in seemingly simple sodium magnesiate systems. Dalton Trans 2014; 43:14424-31. [PMID: 24985749 DOI: 10.1039/c4dt00921e] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Affiliation(s)
- J Francos
- WestCHEM, Department of Pure and Applied Chemistry, University of Strathclyde, 295 Cathedral Street, Glasgow, G1 1XL, UK.
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Werner T, Bauer M, Riahi AM, Schramm H. A Catalytic System for the Activation of Diorganozinc Reagents. European J Org Chem 2014. [DOI: 10.1002/ejoc.201402138] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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34
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Frischmuth A, Fernández M, Barl NM, Achrainer F, Zipse H, Berionni G, Mayr H, Karaghiosoff K, Knochel P. In-situ-Abfangmethode zur Metallierung funktionalisierter Arene und Heteroarene mit TMPLi in Gegenwart von ZnCl2und anderen Metallsalzen. Angew Chem Int Ed Engl 2014. [DOI: 10.1002/ange.201403688] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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35
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Frischmuth A, Fernández M, Barl NM, Achrainer F, Zipse H, Berionni G, Mayr H, Karaghiosoff K, Knochel P. New In Situ Trapping Metalations of Functionalized Arenes and Heteroarenes with TMPLi in the Presence of ZnCl2and Other Metal Salts. Angew Chem Int Ed Engl 2014; 53:7928-32. [DOI: 10.1002/anie.201403688] [Citation(s) in RCA: 49] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/25/2014] [Indexed: 12/31/2022]
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36
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Hedidi M, Bentabed-Ababsa G, Derdour A, Roisnel T, Dorcet V, Chevallier F, Picot L, Thiéry V, Mongin F. Synthesis of C,N'-linked bis-heterocycles using a deprotometalation-iodination-N-arylation sequence and evaluation of their antiproliferative activity in melanoma cells. Bioorg Med Chem 2014; 22:3498-507. [PMID: 24831678 DOI: 10.1016/j.bmc.2014.04.028] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/07/2014] [Revised: 04/15/2014] [Accepted: 04/15/2014] [Indexed: 10/25/2022]
Abstract
Benzothiophene, benzofuran, benzothiazole and benzoxazole were deprotometalated using the lithium-zinc combination prepared from ZnCl2·TMEDA (TMEDA=N,N,N',N'-tetramethylethylenediamine, 1equiv) and lithium 2,2,6,6-tetramethylpiperidide (LiTMP, 3equiv). Subsequent interception of the 2-metalated derivatives using iodine as electrophile led to the iodides in 81%, 82%, 67% and 42% yields, respectively. These yields are higher (10% more) than those obtained using ZnCl2·TMEDA (0.5equiv) and LiTMP (1.5equiv), except in the case of benzoxazole (10% less). The crude iodides were involved in the N-arylation of pyrrole, indole, carbazole, pyrazole, indazole, imidazole and benzimidazole in the presence of Cu (0.2equiv) and Cs2CO3 (2equiv), and using acetonitrile as solvent (no other ligand) to provide after 24h reflux the expected N-arylated azoles in yields ranging from 33% to 81%. Using benzotriazole also led to N-arylation products, but in lower 34%, 39%, 36% and 6% yields, respectively. A further study with this azole evidenced the impact of 2,2,6,6-tetramethylpiperidine on the N-arylation yields. Most of the C,N'-linked bis-heterocycles thus synthesized (in particular those containing benzimidazole) induced a high growth inhibition of A2058 melanoma cells after a 72h treatment at 10(-5)M.
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Affiliation(s)
- Madani Hedidi
- Chimie et Photonique Moléculaires, Institut des Sciences Chimiques de Rennes, UMR 6226, CNRS-Université de Rennes 1, Bâtiment 10A, Case 1003, Campus de Beaulieu, 35042 Rennes, France; Laboratoire de Synthèse Organique Appliquée, Faculté des Sciences, Université d'Oran, BP 1524 El M'Naouer, 31000 Oran, Algeria
| | - Ghenia Bentabed-Ababsa
- Laboratoire de Synthèse Organique Appliquée, Faculté des Sciences, Université d'Oran, BP 1524 El M'Naouer, 31000 Oran, Algeria.
| | - Aïcha Derdour
- Laboratoire de Synthèse Organique Appliquée, Faculté des Sciences, Université d'Oran, BP 1524 El M'Naouer, 31000 Oran, Algeria
| | - Thierry Roisnel
- Centre de Diffractométrie X, Institut des Sciences Chimiques de Rennes, UMR 6226, CNRS-Université de Rennes 1, Bâtiment 10B, Campus de Beaulieu, 35042 Rennes Cedex, France
| | - Vincent Dorcet
- Centre de Diffractométrie X, Institut des Sciences Chimiques de Rennes, UMR 6226, CNRS-Université de Rennes 1, Bâtiment 10B, Campus de Beaulieu, 35042 Rennes Cedex, France
| | - Floris Chevallier
- Chimie et Photonique Moléculaires, Institut des Sciences Chimiques de Rennes, UMR 6226, CNRS-Université de Rennes 1, Bâtiment 10A, Case 1003, Campus de Beaulieu, 35042 Rennes, France
| | - Laurent Picot
- Laboratoire Littoral Environnement et Sociétés, UMRi CNRS 7266, Université de La Rochelle, 17042 La Rochelle, France
| | - Valérie Thiéry
- Laboratoire Littoral Environnement et Sociétés, UMRi CNRS 7266, Université de La Rochelle, 17042 La Rochelle, France.
| | - Florence Mongin
- Chimie et Photonique Moléculaires, Institut des Sciences Chimiques de Rennes, UMR 6226, CNRS-Université de Rennes 1, Bâtiment 10A, Case 1003, Campus de Beaulieu, 35042 Rennes, France.
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37
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Kleeberg C, Grunenberg J, Xie X. K–H3C and K–Sn Interactions in Potassium Trimethylstannyl Complexes: A Structural, Mechanochemical, and NMR Study. Inorg Chem 2014; 53:4400-10. [DOI: 10.1021/ic500065s] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
Affiliation(s)
- Christian Kleeberg
- Institut für Anorganische und Analytische Chemie, Technische Universität Carolo-Wilhelmina zu Braunschweig , Hagenring 30, 38106 Braunschweig, Germany
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38
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Diastereoselective deprotonative metalation of chiral ferrocene derived acetals and esters using mixed lithium–cadmium and lithium–zinc combinations. Tetrahedron 2014. [DOI: 10.1016/j.tet.2014.02.010] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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39
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Kennedy AR, Klett J, McGrath G, Mulvey RE, Robertson GM, Robertson SD, O’Hara CT. Synthesis of an alkylmagnesium amide and interception of a ring-opened isomer of the important utility amide 2,2,6,6-tetramethylpiperidide (TMP). Inorganica Chim Acta 2014. [DOI: 10.1016/j.ica.2013.11.015] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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40
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Tilly D, Dayaker G, Bachu P. Cobalt mediated C–H bond functionalization: emerging tools for organic synthesis. Catal Sci Technol 2014. [DOI: 10.1039/c4cy00053f] [Citation(s) in RCA: 49] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
This review provides a perspective on C–H bond functionalization mediated by cobalt complexes used in either stoichiometric or catalytic amounts, without the contribution of any other transition metal, for organic synthesis applications.
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Affiliation(s)
- David Tilly
- UMR CNRS 6226 Université de Rennes 1
- 35000 Rennes, France
| | - Gandrath Dayaker
- Institut des biomolécules Max Mousseron
- Faculté de Pharmacie Av. Charles Flahault
- 34093 Montpellier, France
| | - Prabhakar Bachu
- Institute for Molecular Bioscience
- The University of Queensland
- Brisbane, Australia
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41
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Armstrong DR, Crosbie E, Hevia E, Mulvey RE, Ramsay DL, Robertson SD. TMP (2,2,6,6-tetramethylpiperidide)-aluminate bases: lithium-mediated alumination or lithiation–alkylaluminium-trapping reagents? Chem Sci 2014. [DOI: 10.1039/c4sc01108b] [Citation(s) in RCA: 58] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/30/2023] Open
Abstract
Surprisingly lithium TMP-aluminate reagents are not capable of directly aluminating anisole as previously thought but operateviasequential lithiation–alkylaluminium trapping.
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Affiliation(s)
- David R. Armstrong
- WestCHEM
- Department of Pure and Applied Chemistry
- University of Strathclyde
- Glasgow, UK
| | - Elaine Crosbie
- WestCHEM
- Department of Pure and Applied Chemistry
- University of Strathclyde
- Glasgow, UK
| | - Eva Hevia
- WestCHEM
- Department of Pure and Applied Chemistry
- University of Strathclyde
- Glasgow, UK
| | - Robert E. Mulvey
- WestCHEM
- Department of Pure and Applied Chemistry
- University of Strathclyde
- Glasgow, UK
| | - Donna L. Ramsay
- WestCHEM
- Department of Pure and Applied Chemistry
- University of Strathclyde
- Glasgow, UK
| | - Stuart D. Robertson
- WestCHEM
- Department of Pure and Applied Chemistry
- University of Strathclyde
- Glasgow, UK
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42
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Marquise N, Bretel G, Lassagne F, Chevallier F, Roisnel T, Dorcet V, Halauko YS, Ivashkevich OA, Matulis VE, Gros PC, Mongin F. Deproto-metallation using mixed lithium–zinc and lithium–copper bases and computed CH acidity of 2-substituted quinolines. RSC Adv 2014. [DOI: 10.1039/c4ra02583k] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023] Open
Abstract
The metallated quinolines were functionalized by iodolysis or aroylation.
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Affiliation(s)
- Nada Marquise
- Chimie et Photonique Moléculaires
- Institut des Sciences Chimiques de Rennes
- UMR 6226 Université de Rennes 1
- CNRS
- Bâtiment 10A, Case 1003
| | - Guillaume Bretel
- Chimie et Photonique Moléculaires
- Institut des Sciences Chimiques de Rennes
- UMR 6226 Université de Rennes 1
- CNRS
- Bâtiment 10A, Case 1003
| | - Frédéric Lassagne
- Chimie et Photonique Moléculaires
- Institut des Sciences Chimiques de Rennes
- UMR 6226 Université de Rennes 1
- CNRS
- Bâtiment 10A, Case 1003
| | - Floris Chevallier
- Chimie et Photonique Moléculaires
- Institut des Sciences Chimiques de Rennes
- UMR 6226 Université de Rennes 1
- CNRS
- Bâtiment 10A, Case 1003
| | - Thierry Roisnel
- Centre de DIFfractométrie X
- Institut des Sciences Chimiques de Rennes
- UMR 6226 Université de Rennes 1
- CNRS
- 35042 Rennes, France
| | - Vincent Dorcet
- Centre de DIFfractométrie X
- Institut des Sciences Chimiques de Rennes
- UMR 6226 Université de Rennes 1
- CNRS
- 35042 Rennes, France
| | | | | | - Vadim E. Matulis
- Research Institute for Physico-Chemical Problems of Belarusian State University
- Minsk, Belarus
| | - Philippe C. Gros
- HECRIN
- SRSMC
- Université de Lorraine-CNRS
- Vandoeuvre-Lès-Nancy, France
| | - Florence Mongin
- Chimie et Photonique Moléculaires
- Institut des Sciences Chimiques de Rennes
- UMR 6226 Université de Rennes 1
- CNRS
- Bâtiment 10A, Case 1003
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Martínez-Martínez AJ, Armstrong DR, Conway B, Fleming BJ, Klett J, Kennedy AR, Mulvey RE, Robertson SD, O'Hara CT. Pre-inverse-crowns: synthetic, structural and reactivity studies of alkali metal magnesiates primed for inverse crown formation. Chem Sci 2014. [DOI: 10.1039/c3sc52816b] [Citation(s) in RCA: 52] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022] Open
Abstract
The synthesis, structure and reactivity of donor-free sodium and potassium magnesiates are assessed culminating in the unique 1,4-dimetallation of naphthalene.
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Affiliation(s)
| | - D. R. Armstrong
- WestCHEM
- Department of Pure and Applied Chemistry
- University of Strathclyde
- Glasgow, UK
| | - B. Conway
- WestCHEM
- Department of Pure and Applied Chemistry
- University of Strathclyde
- Glasgow, UK
| | - B. J. Fleming
- WestCHEM
- Department of Pure and Applied Chemistry
- University of Strathclyde
- Glasgow, UK
| | - J. Klett
- WestCHEM
- Department of Pure and Applied Chemistry
- University of Strathclyde
- Glasgow, UK
| | - A. R. Kennedy
- WestCHEM
- Department of Pure and Applied Chemistry
- University of Strathclyde
- Glasgow, UK
| | - R. E. Mulvey
- WestCHEM
- Department of Pure and Applied Chemistry
- University of Strathclyde
- Glasgow, UK
| | - S. D. Robertson
- WestCHEM
- Department of Pure and Applied Chemistry
- University of Strathclyde
- Glasgow, UK
| | - C. T. O'Hara
- WestCHEM
- Department of Pure and Applied Chemistry
- University of Strathclyde
- Glasgow, UK
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44
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Uchiyama M, Wang C. New Formulas for Zincate Chemistry: Synergistic Effect and Synthetic Applications of Hetero-bimetal Ate Complexes. TOP ORGANOMETAL CHEM 2014. [DOI: 10.1007/3418_2013_72] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
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45
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Nagaradja E, Chevallier F, Roisnel T, Dorcet V, Halauko YS, Ivashkevich OA, Matulis VE, Mongin F. Deproto-metallation using a mixed lithium–zinc base and computed CH acidity of 1-aryl 1H-benzotriazoles and 1-aryl 1H-indazoles. Org Biomol Chem 2014; 12:1475-87. [DOI: 10.1039/c3ob42380h] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
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46
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Hevia E, Kennedy AR, Mulvey RE, Ramsay DL, Robertson SD. Concealed Cyclotrimeric Polymorph of Lithium 2,2,6,6-Tetramethylpiperidide Unconcealed: X-Ray Crystallographic and NMR Spectroscopic Studies. Chemistry 2013; 19:14069-75. [DOI: 10.1002/chem.201302709] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/11/2013] [Indexed: 11/06/2022]
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Armstrong DR, Garden JA, Kennedy AR, Leenhouts SM, Mulvey RE, O'Keefe P, O'Hara CT, Steven A. Evaluating cis-2,6-dimethylpiperidide (cis-DMP) as a base component in lithium-mediated zincation chemistry. Chemistry 2013; 19:13492-503. [PMID: 23955639 PMCID: PMC4517102 DOI: 10.1002/chem.201301180] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/27/2013] [Indexed: 11/14/2022]
Abstract
Most recent advances in metallation chemistry have centred on the bulky secondary amide 2,2,6,6-tetramethylpiperidide (TMP) within mixed metal, often ate, compositions. However, the precursor amine TMP(H) is rather expensive so a cheaper substitute would be welcome. Thus this study was aimed towards developing cheaper non-TMP based mixed-metal bases and, as cis-2,6-dimethylpiperidide (cis-DMP) was chosen as the alternative amide, developing cis-DMP zincate chemistry which has received meagre attention compared to that of its methyl-rich counterpart TMP. A new lithium diethylzincate, [(TMEDA)LiZn(cis-DMP)Et2] (TMEDA=N,N,N′,N′-tetramethylethylenediamine) has been synthesised by co-complexation of Li(cis-DMP), Et2Zn and TMEDA, and characterised by NMR (including DOSY) spectroscopy and X-ray crystallography, which revealed a dinuclear contact ion pair arrangement. By using N,N-diisopropylbenzamide as a test aromatic substrate, the deprotonative reactivity of [(TMEDA)LiZn(cis-DMP)Et2] has been probed and contrasted with that of the known but previously uninvestigated di-tert-butylzincate, [(TMEDA)LiZn(cis-DMP)tBu2]. The former was found to be the superior base (for example, producing the ortho-deuteriated product in respective yields of 78 % and 48 % following D2O quenching of zincated benzamide intermediates). An 88 % yield of 2-iodo-N,N-diisopropylbenzamide was obtained on reaction of two equivalents of the diethylzincate with the benzamide followed by iodination. Comparisons are also drawn using 1,1,1,3,3,3-hexamethyldisilazide (HMDS), diisopropylamide and TMP as the amide component in the lithium amide, Et2Zn and TMEDA system. Under certain conditions, the cis-DMP base system was found to give improved results in comparison to HMDS and diisopropylamide (DA), and comparable results to a TMP system. Two novel complexes isolated from reactions of the di-tert-butylzincate and crystallographically characterised, namely the pre-metallation complex [{(iPr)2N(Ph)C=O}LiZn(cis-DMP)tBu2] and the post-metallation complex [(TMEDA)Li(cis-DMP){2-[1-C(=O)N(iPr)2]C6H4}Zn(tBu)], shed valuable light on the structures and mechanisms involved in these alkali-metal-mediated zincation reactions. Aspects of these reactions are also modelled by DFT calculations.
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Affiliation(s)
- David R Armstrong
- WestCHEM, Department of Pure and Applied Chemistry, University of Strathclyde, Glasgow, G1 1XL (UK)
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48
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Kadiyala RR, Tilly D, Nagaradja E, Roisnel T, Matulis VE, Ivashkevich OA, Halauko YS, Chevallier F, Gros PC, Mongin F. Computed CH Acidity of Biaryl Compounds and Their Deprotonative Metalation by Using a Mixed Lithium/Zinc-TMP Base. Chemistry 2013; 19:7944-60. [DOI: 10.1002/chem.201300552] [Citation(s) in RCA: 44] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/12/2013] [Indexed: 11/06/2022]
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49
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Khairallah GN, Thum CCL, Lesage D, Tabet JC, O’Hair RAJ. Gas-Phase Formation and Fragmentation Reactions of the Organomagnesates [RMgX2]−. Organometallics 2013. [DOI: 10.1021/om3011917] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
| | | | - Denis Lesage
- Institut Parisien de Chimie Moléculaire, Université Pierre et Marie Curie-Paris 6 (UPMC), UMR 7201- FR2769, Place Jussieu, 75252 Paris Cedex 05, France
| | - Jean-Claude Tabet
- Institut Parisien de Chimie Moléculaire, Université Pierre et Marie Curie-Paris 6 (UPMC), UMR 7201- FR2769, Place Jussieu, 75252 Paris Cedex 05, France
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50
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Unsinn A, Wunderlich SH, Knochel P. Accelerated Zincations for an Efficient and Mild Functionalization of Aromatics and Heterocycles. Adv Synth Catal 2013. [DOI: 10.1002/adsc.201300049] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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