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Nimkar A, Maity S, Hoz S. Coordination of tridentate ligands to SmI 2: cooperativity and incremental effect on reduction potential and on reactivity. PURE APPL CHEM 2020. [DOI: 10.1515/pac-2019-0213] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Abstract
Abstract
The effect of coordination of a series of tridentate ligands (TDLs) on various features of SmI2 was determined. The TDLs used in this study were diethylene glycol (OOO), diethanolamine (ONO), 2-(2-Aminoethoxy) ethanol (OON), N-(2-Hydroxyethyl) ethylene diamine (ONN) and glycerol (GLY). Of special interest is the effect of these additives on the reduction potential of SmI2. The cyclic voltammograms of the TDLs with nitrogen at the binding sites display simultaneously several peaks, each corresponding to a different coordination level of SmI2, enabling determination of three equilibrium constants. The results are in concert with electronic spectra of SmI2 complexes with these ligands. The second and third equilibrium constants were found to be larger than the first, demonstrating the cooperativity effect. Moreover, the incremental effect of each moiety on the reduction potential of SmI2 was determined. Regarding reactivity of SmI2, excessive coordination of some ligands is shown to have an adverse effect.
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Affiliation(s)
- Amey Nimkar
- Department of Chemistry , Bar-Ilan University , Ramat Gan 5290002 , Israel
| | - Sandeepan Maity
- Department of Chemistry , Bar-Ilan University , Ramat Gan 5290002 , Israel
| | - Shmaryahu Hoz
- Department of Chemistry , Bar-Ilan University , Ramat Gan 5290002 , Israel
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2
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SmI2-promoted cross coupling reaction of N-2-bromoethylphthalimide and carbonyl compounds: Synthesis of α-aryl-α′-hydroxy ketones. Tetrahedron 2020. [DOI: 10.1016/j.tet.2019.130839] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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3
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Soto M, Soengas RG, Silva AMS, Gotor-Fernández V, Rodríguez-Solla H. Temperature-Controlled Stereodivergent Synthesis of 2,2'-Biflavanones Promoted by Samarium Diiodide. Chemistry 2019; 25:13104-13108. [PMID: 31361369 DOI: 10.1002/chem.201902927] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/26/2019] [Revised: 07/29/2019] [Indexed: 12/11/2022]
Abstract
In this work, the first example of a radical stereodivergent reaction directed towards the stereoselective synthesis of both (R*,R*)- and (R*,S*)-2,2'-biflavanones promoted by samarium diiodide is reported. Control experiments showed that the selectivity of this reaction was exclusively controlled by the temperature. It was possible to generate a variety of 2,2'-biflavanones bearing different substitution patterns at the aromatic ring in good-to-quantitative yields, being both stereoisomers of the desired compounds obtained with total or high control of selectivity. A mechanism that explains both the generation of the corresponding 2,2'-biflavanones and the selectivity is also discussed. The structure and stereochemistry determination of each isomer was unequivocally elucidated by single-crystal X-ray diffraction experiments.
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Affiliation(s)
- Martín Soto
- Department of Organic and Inorganic Chemistry, University of Oviedo, Avenida Julián Clavería 8, 33006, Oviedo, Spain
| | - Raquel G Soengas
- Research Centre CIAIMBITAL, University of Almería, Carretera de Sacramento s/n, 04120, Almería, Spain
| | - Artur M S Silva
- Department of Chemistry & QOPNA, University of Aveiro, 3810-193, Aveiro, Portugal
| | - Vicente Gotor-Fernández
- Department of Organic and Inorganic Chemistry, University of Oviedo, Avenida Julián Clavería 8, 33006, Oviedo, Spain
| | - Humberto Rodríguez-Solla
- Department of Organic and Inorganic Chemistry, University of Oviedo, Avenida Julián Clavería 8, 33006, Oviedo, Spain
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Abstract
Ligation plays a multifaceted role in the chemistry of SmI2. Depending on the ligand, two of its major effects are increasing the reduction potential of SmI2, and in the case of a ligand, which is also a proton donor, it may also enhance the reaction by protonation of the radical anion generated in the preceding step. It turns out that the number of ligand molecules that are needed to maximize the reduction potential of SmI2 is significantly smaller than the number of ligand molecules needed for a maximal enhancement of the protonation rate. In addition to the economical use of the ligand, this information can also be utilized as a diagnostic tool for the reaction mechanism in differentiating between single and multistep processes. The possible pitfalls in applying this diagnostic tool to PCET and cyclization reactions are discussed.
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Affiliation(s)
- Sandeepan Maity
- Department of Chemistry , Bar-Ilan University , Ramat Gan 5290002 , Israel
| | - Amey Nimkar
- Department of Chemistry , Bar-Ilan University , Ramat Gan 5290002 , Israel
| | - Shmaryahu Hoz
- Department of Chemistry , Bar-Ilan University , Ramat Gan 5290002 , Israel
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5
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Szostak M, Spain M, Sautier B, Procter DJ. Switching between Reaction Pathways by an Alcohol Cosolvent Effect: SmI2–Ethylene Glycol vs SmI2–H2O Mediated Synthesis of Uracils. Org Lett 2014; 16:5694-7. [DOI: 10.1021/ol502775w] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Affiliation(s)
- Michal Szostak
- Department
of Chemistry, Rutgers University, 73 Warren Street, Newark, New Jersey 07102, United States
| | - Malcolm Spain
- School
of Chemistry, University of Manchester, Oxford Road, Manchester, M13 9PL, United Kingdom
| | - Brice Sautier
- School
of Chemistry, University of Manchester, Oxford Road, Manchester, M13 9PL, United Kingdom
| | - David J. Procter
- School
of Chemistry, University of Manchester, Oxford Road, Manchester, M13 9PL, United Kingdom
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6
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Szostak M, Spain M, Procter DJ. Selective Synthesis of α,α-Dideuterio Alcohols by the Reduction of Carboxylic Acids Using SmI2 and D2O as Deuterium Source under SET Conditions. Org Lett 2014; 16:5052-5. [DOI: 10.1021/ol502404e] [Citation(s) in RCA: 42] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Affiliation(s)
- Michal Szostak
- Department
of Chemistry, Rutgers University, 73 Warren Street, Newark, New Jersey 07102, United States
| | - Malcolm Spain
- School
of Chemistry, University of Manchester, Oxford Road, Manchester M13 9PL, United Kingdom
| | - David J. Procter
- School
of Chemistry, University of Manchester, Oxford Road, Manchester M13 9PL, United Kingdom
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7
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Szostak M, Fazakerley NJ, Parmar D, Procter DJ. Cross-Coupling Reactions Using Samarium(II) Iodide. Chem Rev 2014; 114:5959-6039. [DOI: 10.1021/cr400685r] [Citation(s) in RCA: 290] [Impact Index Per Article: 29.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Affiliation(s)
- Michal Szostak
- School
of Chemistry, University of Manchester, Oxford Road, Manchester, M13 9PL, United Kingdom
| | - Neal J. Fazakerley
- School
of Chemistry, University of Manchester, Oxford Road, Manchester, M13 9PL, United Kingdom
| | - Dixit Parmar
- School
of Chemistry, University of Manchester, Oxford Road, Manchester, M13 9PL, United Kingdom
| | - David J. Procter
- School
of Chemistry, University of Manchester, Oxford Road, Manchester, M13 9PL, United Kingdom
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8
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Gopalaiah K, Kagan HB. Recent Developments in Samarium Diiodide Promoted Organic Reactions. CHEM REC 2013; 13:187-208. [DOI: 10.1002/tcr.201200028] [Citation(s) in RCA: 35] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/07/2012] [Indexed: 11/10/2022]
Affiliation(s)
- Kovuru Gopalaiah
- Department of Chemistry; University of Delhi; Delhi; 110007; India
| | - Henri B. Kagan
- ICMMO (UMR CNRS 8182); Laboratoire de Catalyse Moléculaire; Université Paris-Sud; 91405; Orsay; France
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9
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Szostak M, Spain M, Procter DJ. Recent advances in the chemoselective reduction of functional groups mediated by samarium(ii) iodide: a single electron transfer approach. Chem Soc Rev 2013; 42:9155-83. [DOI: 10.1039/c3cs60223k] [Citation(s) in RCA: 164] [Impact Index Per Article: 14.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
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10
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Rodríguez-Solla H, Concellón C, Tuya P, García-Granda S, Díaz MR. Samarium-Promoted Asymmetric Aldol-Tishchenko Reaction: Synthesis of Amino Acid-Derived 4-Amino-1,3-diols. Adv Synth Catal 2012. [DOI: 10.1002/adsc.201100952] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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11
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Szostak M, Spain M, Parmar D, Procter DJ. Selective reductive transformations using samarium diiodide-water. Chem Commun (Camb) 2012; 48:330-46. [DOI: 10.1039/c1cc14252f] [Citation(s) in RCA: 106] [Impact Index Per Article: 8.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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12
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Concellón JM, Rodríguez-Solla H, Concellón C, Simal C, Alvaredo N. Sequential Synthesis of (E)-α,β-Unsaturated Primary Amides with Complete Stereoselectivity. J Org Chem 2010; 75:3451-3. [DOI: 10.1021/jo100320j] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- José M. Concellón
- Departamento de Química Orgánica e Inorgánica, Facultad de Química, Universidad de Oviedo, Julián Clavería 8, 33071 Oviedo, Spain
| | - Humberto Rodríguez-Solla
- Departamento de Química Orgánica e Inorgánica, Facultad de Química, Universidad de Oviedo, Julián Clavería 8, 33071 Oviedo, Spain
| | - Carmen Concellón
- Departamento de Química Orgánica e Inorgánica, Facultad de Química, Universidad de Oviedo, Julián Clavería 8, 33071 Oviedo, Spain
| | - Carmen Simal
- Departamento de Química Orgánica e Inorgánica, Facultad de Química, Universidad de Oviedo, Julián Clavería 8, 33071 Oviedo, Spain
| | - Noemí Alvaredo
- Departamento de Química Orgánica e Inorgánica, Facultad de Química, Universidad de Oviedo, Julián Clavería 8, 33071 Oviedo, Spain
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13
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Concellón JM, Rodríguez-Solla H, Concellón C, del Amo V. Stereospecific and highly stereoselective cyclopropanation reactions promoted by samarium. Chem Soc Rev 2010; 39:4103-13. [DOI: 10.1039/b915662c] [Citation(s) in RCA: 68] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
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14
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Xu Q, Cheng B, Ye X, Zhai H. SmI2-Mediated Carbon−Carbon Bond Fragmentation in α-Aminomethyl Malonates. Org Lett 2009; 11:4136-8. [DOI: 10.1021/ol901608k] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Qiongfeng Xu
- The State Key Laboratory of Natural and Biomimetic Drugs, School of Pharmaceutical Sciences, Peking University, 38 Xue Yuan Road, Beijing 100083, China, The Key Laboratory of Synthetic Chemistry of Natural Substances and the State Key Laboratory of Bioorganic and Natural Products Chemistry, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, Shanghai 200032, China, and Hefei National Laboratory for Physical Science at Microscale and Department of Chemistry, University of Science and
| | - Bin Cheng
- The State Key Laboratory of Natural and Biomimetic Drugs, School of Pharmaceutical Sciences, Peking University, 38 Xue Yuan Road, Beijing 100083, China, The Key Laboratory of Synthetic Chemistry of Natural Substances and the State Key Laboratory of Bioorganic and Natural Products Chemistry, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, Shanghai 200032, China, and Hefei National Laboratory for Physical Science at Microscale and Department of Chemistry, University of Science and
| | - Xinshan Ye
- The State Key Laboratory of Natural and Biomimetic Drugs, School of Pharmaceutical Sciences, Peking University, 38 Xue Yuan Road, Beijing 100083, China, The Key Laboratory of Synthetic Chemistry of Natural Substances and the State Key Laboratory of Bioorganic and Natural Products Chemistry, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, Shanghai 200032, China, and Hefei National Laboratory for Physical Science at Microscale and Department of Chemistry, University of Science and
| | - Hongbin Zhai
- The State Key Laboratory of Natural and Biomimetic Drugs, School of Pharmaceutical Sciences, Peking University, 38 Xue Yuan Road, Beijing 100083, China, The Key Laboratory of Synthetic Chemistry of Natural Substances and the State Key Laboratory of Bioorganic and Natural Products Chemistry, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, Shanghai 200032, China, and Hefei National Laboratory for Physical Science at Microscale and Department of Chemistry, University of Science and
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