51
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Mills LR, Barrera Arbelaez LM, Rousseaux SAL. Electrophilic Zinc Homoenolates: Synthesis of Cyclopropylamines from Cyclopropanols and Amines. J Am Chem Soc 2017; 139:11357-11360. [DOI: 10.1021/jacs.7b07104] [Citation(s) in RCA: 35] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Affiliation(s)
- L. Reginald Mills
- Davenport Research Laboratories,
Department of Chemistry, University of Toronto, 80 St. George Street, Toronto, Ontario M5S 3H6, Canada
| | - Luis Miguel Barrera Arbelaez
- Davenport Research Laboratories,
Department of Chemistry, University of Toronto, 80 St. George Street, Toronto, Ontario M5S 3H6, Canada
| | - Sophie A. L. Rousseaux
- Davenport Research Laboratories,
Department of Chemistry, University of Toronto, 80 St. George Street, Toronto, Ontario M5S 3H6, Canada
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52
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Estarellas C, Arioli F, Pérez M, Are C, Hevia D, Molins E, Luque FJ, Bosch J, Amat M. Origin of the Base-Dependent Facial Selectivity in Annulation Reactions of Nazarov-Type Reagents with Unsaturated Indolo[2,3- a]quinolizidine Lactams. European J Org Chem 2017. [DOI: 10.1002/ejoc.201700610] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
Affiliation(s)
- Carolina Estarellas
- Department of Nutrition; Food Sciences and Gastronomy; Faculty of Pharmacy and Food Sciences, and Institute of Biomedicine (IBUB); University of Barcelona; 08921 Santa Coloma de Gramanet Spain
| | - Federica Arioli
- Laboratory of Organic Chemistry; Faculty of Pharmacy and Food Sciences, and Institute of Biomedicine (IBUB); University of Barcelona; 08028 Barcelona Spain
| | - Maria Pérez
- Department of Nutrition; Food Sciences and Gastronomy; Faculty of Pharmacy and Food Sciences, and Institute of Biomedicine (IBUB); University of Barcelona; 08921 Santa Coloma de Gramanet Spain
| | - Celeste Are
- Laboratory of Organic Chemistry; Faculty of Pharmacy and Food Sciences, and Institute of Biomedicine (IBUB); University of Barcelona; 08028 Barcelona Spain
| | - David Hevia
- Laboratory of Organic Chemistry; Faculty of Pharmacy and Food Sciences, and Institute of Biomedicine (IBUB); University of Barcelona; 08028 Barcelona Spain
| | - Elies Molins
- Institut de Ciència de Materials (CSIC); Campus UAB 08193 Cerdanyola Spain
| | - F. Javier Luque
- Department of Nutrition; Food Sciences and Gastronomy; Faculty of Pharmacy and Food Sciences, and Institute of Biomedicine (IBUB); University of Barcelona; 08921 Santa Coloma de Gramanet Spain
| | - Joan Bosch
- Laboratory of Organic Chemistry; Faculty of Pharmacy and Food Sciences, and Institute of Biomedicine (IBUB); University of Barcelona; 08028 Barcelona Spain
| | - Mercedes Amat
- Laboratory of Organic Chemistry; Faculty of Pharmacy and Food Sciences, and Institute of Biomedicine (IBUB); University of Barcelona; 08028 Barcelona Spain
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53
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Kaldas SJ, O'Keefe KTV, Mendoza-Sanchez R, Yudin AK. Amphoteric Borylketenimines: Versatile Intermediates in the Synthesis of Borylated Heterocycles. Chemistry 2017; 23:9711-9715. [DOI: 10.1002/chem.201702008] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/05/2017] [Indexed: 12/12/2022]
Affiliation(s)
- Sherif J. Kaldas
- Davenport Research Laboratories; Department of Chemistry; University of Toronto; 80 St. George St. Toronto ON M5S 3H6 Canada
| | - Kowan T. V. O'Keefe
- Davenport Research Laboratories; Department of Chemistry; University of Toronto; 80 St. George St. Toronto ON M5S 3H6 Canada
| | - Rodrigo Mendoza-Sanchez
- Davenport Research Laboratories; Department of Chemistry; University of Toronto; 80 St. George St. Toronto ON M5S 3H6 Canada
| | - Andrei K. Yudin
- Davenport Research Laboratories; Department of Chemistry; University of Toronto; 80 St. George St. Toronto ON M5S 3H6 Canada
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54
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55
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Shao W, Kaldas SJ, Yudin AK. 3-Cyanoallyl boronates are versatile building blocks in the synthesis of polysubstituted thiophenes. Chem Sci 2017; 8:4431-4436. [PMID: 28936329 PMCID: PMC5590094 DOI: 10.1039/c7sc00831g] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/22/2017] [Accepted: 04/11/2017] [Indexed: 01/08/2023] Open
Abstract
We report the preparation of hitherto unprecedented 3-cyanoallyl boronates using condensation of the parent α-boryl aldehyde and nitriles. The resulting allyl boronates have been used to generate a wide range of borylated thiophenes, which represent a valuable class of heterocycles in modern drug discovery. Subsequent Suzuki-Miyaura cross-coupling enabled the synthesis of pharmaceutically important 3,5-disubstituted aminothiophenes. Moreover, late stage functionalization gave access to borylated bromothiophene and thieno[2,3-b]pyridines.
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Affiliation(s)
- Wenjie Shao
- Davenport Research Laboratories , Department of Chemistry , University of Toronto , 80 St. George St. , Toronto , ON M5S 3H6 , Canada .
| | - Sherif J Kaldas
- Davenport Research Laboratories , Department of Chemistry , University of Toronto , 80 St. George St. , Toronto , ON M5S 3H6 , Canada .
| | - Andrei K Yudin
- Davenport Research Laboratories , Department of Chemistry , University of Toronto , 80 St. George St. , Toronto , ON M5S 3H6 , Canada .
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56
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Vallejos MM, Pellegrinet SC. Theoretical Study of the BF3-Promoted Rearrangement of Oxiranyl N-Methyliminodiacetic Acid Boronates. J Org Chem 2017; 82:5917-5925. [DOI: 10.1021/acs.joc.7b01096] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Affiliation(s)
- Margarita M. Vallejos
- Laboratorio
de Química Orgánica, IQUIBA-NEA, Universidad Nacional del Nordeste, CONICET, FACENA, Av. Libertad 5460, Corrientes 3400, Argentina
| | - Silvina C. Pellegrinet
- Instituto
de Química Rosario (CONICET), Facultad de Ciencias Bioquímicas
y Farmacéuticas, Universidad Nacional de Rosario, Suipacha
531, Rosario 2000, Argentina
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57
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Yang JM, Li ZQ, Li ML, He Q, Zhu SF, Zhou QL. Catalytic B-H Bond Insertion Reactions Using Alkynes as Carbene Precursors. J Am Chem Soc 2017; 139:3784-3789. [PMID: 28195708 DOI: 10.1021/jacs.6b13168] [Citation(s) in RCA: 106] [Impact Index Per Article: 15.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
Herein, we report transition-metal-catalyzed B-H bond insertion reactions between borane adducts and alkynes to afford organoboron compounds in excellent yields under mild reaction conditions. This successful use of alkynes as carbene precursors in these reactions constitutes a new route to organoboron compounds. The starting materials are safe and readily available, and the reaction exhibits 100% atom-economy. Moreover, an asymmetric version catalyzed by chiral dirhodium complexes produced chiral boranes with excellent enantioselectivity (up to 96% ee). This is the first report of highly enantioselective heteroatom-hydrogen bond insertion reactions of metal carbenes generated in situ from alkynes. The chiral products of the reaction could be easily transformed to widely used borates and diaryl methanol compounds without loss of optical purity, which demonstrates its potential utility in organic synthesis. A kinetics study indicated that the Cu-catalyzed B-H bond insertion reaction is first order with respect to the catalyst and the alkyne and zero order with respect to the borane adduct, and no kinetic isotopic effect was observed in the reaction of the adduct. These results, along with density functional theory calculations, suggest that the formation of the Cu carbene is the rate-limiting step and that the B-H bond insertion is a fast, concerted process.
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Affiliation(s)
- Ji-Min Yang
- State Key Laboratory and Institute of Elemento-Organic Chemistry, Nankai University , Tianjin 300071, China
| | - Zi-Qi Li
- State Key Laboratory and Institute of Elemento-Organic Chemistry, Nankai University , Tianjin 300071, China
| | - Mao-Lin Li
- State Key Laboratory and Institute of Elemento-Organic Chemistry, Nankai University , Tianjin 300071, China
| | - Qiao He
- State Key Laboratory and Institute of Elemento-Organic Chemistry, Nankai University , Tianjin 300071, China
| | - Shou-Fei Zhu
- State Key Laboratory and Institute of Elemento-Organic Chemistry, Nankai University , Tianjin 300071, China
| | - Qi-Lin Zhou
- State Key Laboratory and Institute of Elemento-Organic Chemistry, Nankai University , Tianjin 300071, China.,Collaborative Innovation Center of Chemical Science and Engineering (Tianjin), Nankai University , Tianjin 300071, China
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58
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Trost BM, Saget T, Hung CIJ. Efficient Access to Chiral Trisubstituted Aziridines via Catalytic Enantioselective Aza-Darzens Reactions. Angew Chem Int Ed Engl 2017; 56:2440-2444. [PMID: 28111864 PMCID: PMC5530870 DOI: 10.1002/anie.201607845] [Citation(s) in RCA: 41] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/11/2016] [Revised: 10/25/2016] [Indexed: 11/07/2022]
Abstract
Herein, we report a Zn-ProPhenol catalyzed aza-Darzens reaction using chlorinated aromatic ketones as nucleophilic partners for the efficient and enantioselective construction of complex trisubstituted aziridines. The α-chloro-β-aminoketone intermediates featuring a chlorinated tetrasubstituted stereocenter can be isolated in high yields and selectivities for further derivatization. Alternatively, they can be directly transformed to the corresponding aziridines in a one-pot fashion. Of note, the reaction can be run on gram-scale with low catalyst loading without impacting its efficiency. Moreover, this methodology was extended to α-bromoketones which are scarcely used in enantioselective catalysis because of their sensitivity and lack of accessibility.
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Affiliation(s)
- Barry M Trost
- Department of Chemistry, Stanford University, Stanford, CA, 94305-5080, USA
| | - Tanguy Saget
- Department of Chemistry, Stanford University, Stanford, CA, 94305-5080, USA
| | - Chao-I Joey Hung
- Department of Chemistry, Stanford University, Stanford, CA, 94305-5080, USA
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59
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Gálvez AO, Schaack CP, Noda H, Bode JW. Chemoselective Acylation of Primary Amines and Amides with Potassium Acyltrifluoroborates under Acidic Conditions. J Am Chem Soc 2017; 139:1826-1829. [PMID: 28118000 DOI: 10.1021/jacs.7b00059] [Citation(s) in RCA: 73] [Impact Index Per Article: 10.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
Current methods for constructing amide bonds join amines and carboxylic acids by dehydrative couplings-processes that usually require organic solvents, expensive and often dangerous coupling reagents, and masking other functional groups. Here we describe an amide formation using primary amines and potassium acyltrifluoroborates promoted by simple chlorinating agents that proceeds rapidly in water. The reaction is fast at acidic pH and tolerates alcohols, carboxylic acids, and even secondary amines in the substrates. It is applicable to the functionalization of primary amides, sulfonamides, and other N-functional groups that typically resist classical acylations and can be applied to late-stage functionalizations.
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Affiliation(s)
- Alberto Osuna Gálvez
- Laboratorium für Organische Chemie, Department of Chemistry and Applied Biosciences, ETH-Zürich , 8093 Zürich, Switzerland
| | - Cédric P Schaack
- Laboratorium für Organische Chemie, Department of Chemistry and Applied Biosciences, ETH-Zürich , 8093 Zürich, Switzerland
| | - Hidetoshi Noda
- Laboratorium für Organische Chemie, Department of Chemistry and Applied Biosciences, ETH-Zürich , 8093 Zürich, Switzerland
| | - Jeffrey W Bode
- Laboratorium für Organische Chemie, Department of Chemistry and Applied Biosciences, ETH-Zürich , 8093 Zürich, Switzerland
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60
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Trost BM, Saget T, Hung CIJ. Efficient Access to Chiral Trisubstituted Aziridines via Catalytic Enantioselective Aza-Darzens Reactions. Angew Chem Int Ed Engl 2017. [DOI: 10.1002/ange.201607845] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Affiliation(s)
- Barry M. Trost
- Department of Chemistry; Stanford University; Stanford CA 94305-5080 USA
| | - Tanguy Saget
- Department of Chemistry; Stanford University; Stanford CA 94305-5080 USA
| | - Chao-I Joey Hung
- Department of Chemistry; Stanford University; Stanford CA 94305-5080 USA
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61
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Tejo C, Tirtorahardjo D, Day DP, Ma DL, Leung CH, Chan PWH. Brønsted Base-Mediated Aziridination of 2-Alkyl-Substituted-1,3-Dicarbonyl Compounds and 2-Acyl-Substituted-1,4-Dicarbonyl Compounds by Iminoiodanes. Aust J Chem 2017. [DOI: 10.1071/ch16580] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Abstract
The synthesis of α,α-diacylaziridines and α,α,β-triacylaziridines from reaction of 2-alkyl-substituted-1,3-dicarbonyl compounds and 2-acyl-substituted-1,4-dicarbonyl compounds with arylsulfonyliminoiodinanes (ArSO2N=IPh) under Brønsted base-mediated atmospheric conditions is described. The reaction mechanism is thought to involve the formal oxidation of the substrate followed by aziridination of the ensuing α,β-unsaturated intermediate by the hypervalent iodine(iii) reagent.
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62
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Scharnagl FK, Bose SK, Marder TB. Acylboranes: synthetic strategies and applications. Org Biomol Chem 2017; 15:1738-1752. [DOI: 10.1039/c6ob02425d] [Citation(s) in RCA: 51] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
Acylboranes are an attractive class of compounds, of which the synthesis has very recently been documented as summarised in this review. Access to these compounds provides a path to study their properties and reactivity.
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Affiliation(s)
- Florian Korbinian Scharnagl
- Institut für Anorganische Chemie and Institute for Sustainable Chemistry & Catalysis with Boron
- Julius-Maximilians-Universität Würzburg
- 97074 Würzburg
- Germany
| | - Shubhankar Kumar Bose
- Institut für Anorganische Chemie and Institute for Sustainable Chemistry & Catalysis with Boron
- Julius-Maximilians-Universität Würzburg
- 97074 Würzburg
- Germany
- Centre for Nano and Material Sciences (CNMS)
| | - Todd B. Marder
- Institut für Anorganische Chemie and Institute for Sustainable Chemistry & Catalysis with Boron
- Julius-Maximilians-Universität Würzburg
- 97074 Würzburg
- Germany
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63
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Diaz DB, Scully CCG, Liew SK, Adachi S, Trinchera P, St Denis JD, Yudin AK. Synthesis of Aminoboronic Acid Derivatives from Amines and Amphoteric Boryl Carbonyl Compounds. Angew Chem Int Ed Engl 2016; 55:12659-63. [PMID: 27584917 DOI: 10.1002/anie.201605754] [Citation(s) in RCA: 63] [Impact Index Per Article: 7.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/14/2016] [Indexed: 12/17/2022]
Abstract
Herein, we demonstrate the use of α-boryl aldehydes and acyl boronates in the synthesis of aminoboronic acid derivatives. This work highlights the untapped potential of boron-substituted iminium ions and offers insights into the behavior of N-methyliminodiacetyl (MIDA) boronates during condensation and tautomerization processes. The preparative value of this contribution lies in the demonstration that various amines, including linear and cyclic peptides, can be readily conjugated with boron-containing fragments. A mild deprotection of amino MIDA-boronates enables access to α- and β-aminoboronic acids in high chemical yields. This simple process should be applicable to the synthesis of a wide range of bioactive molecules as well as precursors for cross-coupling reactions.
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Affiliation(s)
- Diego B Diaz
- Davenport Research Laboratories, Department of Chemistry, University of Toronto, 80 St. George St., Toronto, ON, M5S 3H6, Canada
| | - Conor C G Scully
- Davenport Research Laboratories, Department of Chemistry, University of Toronto, 80 St. George St., Toronto, ON, M5S 3H6, Canada
| | - Sean K Liew
- Davenport Research Laboratories, Department of Chemistry, University of Toronto, 80 St. George St., Toronto, ON, M5S 3H6, Canada
| | - Shinya Adachi
- Davenport Research Laboratories, Department of Chemistry, University of Toronto, 80 St. George St., Toronto, ON, M5S 3H6, Canada
| | - Piera Trinchera
- Davenport Research Laboratories, Department of Chemistry, University of Toronto, 80 St. George St., Toronto, ON, M5S 3H6, Canada
| | - Jeffrey D St Denis
- Davenport Research Laboratories, Department of Chemistry, University of Toronto, 80 St. George St., Toronto, ON, M5S 3H6, Canada
| | - Andrei K Yudin
- Davenport Research Laboratories, Department of Chemistry, University of Toronto, 80 St. George St., Toronto, ON, M5S 3H6, Canada.
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64
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Diaz DB, Scully CCG, Liew SK, Adachi S, Trinchera P, St. Denis JD, Yudin AK. Synthesis of Aminoboronic Acid Derivatives from Amines and Amphoteric Boryl Carbonyl Compounds. Angew Chem Int Ed Engl 2016. [DOI: 10.1002/ange.201605754] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Affiliation(s)
- Diego B. Diaz
- Davenport Research Laboratories; Department of Chemistry; University of Toronto; 80 St. George St. Toronto ON M5S 3H6 Canada
| | - Conor C. G. Scully
- Davenport Research Laboratories; Department of Chemistry; University of Toronto; 80 St. George St. Toronto ON M5S 3H6 Canada
| | - Sean K. Liew
- Davenport Research Laboratories; Department of Chemistry; University of Toronto; 80 St. George St. Toronto ON M5S 3H6 Canada
| | - Shinya Adachi
- Davenport Research Laboratories; Department of Chemistry; University of Toronto; 80 St. George St. Toronto ON M5S 3H6 Canada
| | - Piera Trinchera
- Davenport Research Laboratories; Department of Chemistry; University of Toronto; 80 St. George St. Toronto ON M5S 3H6 Canada
| | - Jeffrey D. St. Denis
- Davenport Research Laboratories; Department of Chemistry; University of Toronto; 80 St. George St. Toronto ON M5S 3H6 Canada
| | - Andrei K. Yudin
- Davenport Research Laboratories; Department of Chemistry; University of Toronto; 80 St. George St. Toronto ON M5S 3H6 Canada
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65
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Lv WX, Zeng YF, Li Q, Chen Y, Tan DH, Yang L, Wang H. Oxidative Difunctionalization of Alkenyl MIDA Boronates: A Versatile Platform for Halogenated and Trifluoromethylated α-Boryl Ketones. Angew Chem Int Ed Engl 2016; 55:10069-73. [DOI: 10.1002/anie.201604898] [Citation(s) in RCA: 54] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/19/2016] [Indexed: 01/02/2023]
Affiliation(s)
- Wen-Xin Lv
- School of Pharmaceutical Sciences; Sun Yat-sen University; Guangzhou 510006 China
| | - Yao-Fu Zeng
- School of Pharmaceutical Sciences; Sun Yat-sen University; Guangzhou 510006 China
| | - Qingjiang Li
- School of Pharmaceutical Sciences; Sun Yat-sen University; Guangzhou 510006 China
- Stake Key Laboratory of Natural and Biomimetic Drugs; Peking University; China
| | - Yunyun Chen
- School of Pharmaceutical Sciences; Sun Yat-sen University; Guangzhou 510006 China
| | - Dong-Hang Tan
- School of Pharmaceutical Sciences; Sun Yat-sen University; Guangzhou 510006 China
| | - Ling Yang
- School of Pharmaceutical Sciences; Sun Yat-sen University; Guangzhou 510006 China
| | - Honggen Wang
- School of Pharmaceutical Sciences; Sun Yat-sen University; Guangzhou 510006 China
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66
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Lv WX, Zeng YF, Li Q, Chen Y, Tan DH, Yang L, Wang H. Oxidative Difunctionalization of Alkenyl MIDA Boronates: A Versatile Platform for Halogenated and Trifluoromethylated α-Boryl Ketones. Angew Chem Int Ed Engl 2016. [DOI: 10.1002/ange.201604898] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Affiliation(s)
- Wen-Xin Lv
- School of Pharmaceutical Sciences; Sun Yat-sen University; Guangzhou 510006 China
| | - Yao-Fu Zeng
- School of Pharmaceutical Sciences; Sun Yat-sen University; Guangzhou 510006 China
| | - Qingjiang Li
- School of Pharmaceutical Sciences; Sun Yat-sen University; Guangzhou 510006 China
- Stake Key Laboratory of Natural and Biomimetic Drugs; Peking University; China
| | - Yunyun Chen
- School of Pharmaceutical Sciences; Sun Yat-sen University; Guangzhou 510006 China
| | - Dong-Hang Tan
- School of Pharmaceutical Sciences; Sun Yat-sen University; Guangzhou 510006 China
| | - Ling Yang
- School of Pharmaceutical Sciences; Sun Yat-sen University; Guangzhou 510006 China
| | - Honggen Wang
- School of Pharmaceutical Sciences; Sun Yat-sen University; Guangzhou 510006 China
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67
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Abstract
This review describes available methods for the preparation of α-aminoboronic acids in their racemic or in their enantiopure form. Both, highly stereoselective syntheses and asymmetric procedures leading to the stereocontrolled generation of α-aminoboronic acid derivatives are included. The preparation of acyclic, carbocyclic and azacyclic α-aminoboronic acid derivatives is covered. Within each section, the different synthetic approaches have been classified according to the key bond which is formed to complete the α-aminoboronic acid skeleton.
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Affiliation(s)
- Patricia Andrés
- Departamento de Química Orgánica, Instituto de Síntesis Química y Catálisis Homogénea (ISQCH), CSIC-Universidad de Zaragoza, 50009 Zaragoza, Spain.
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68
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Vincent-Rocan JF, Ivanovich RA, Clavette C, Leckett K, Bejjani J, Beauchemin AM. Cascade reactions of nitrogen-substituted isocyanates: a new tool in heterocyclic chemistry. Chem Sci 2016; 7:315-328. [PMID: 29861985 PMCID: PMC5952554 DOI: 10.1039/c5sc03197d] [Citation(s) in RCA: 34] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/27/2015] [Accepted: 09/22/2015] [Indexed: 11/25/2022] Open
Abstract
In contrast to normal C-substituted isocyanates, nitrogen-substituted isocyanates (N-isocyanates) are rare. Their high reactivity and amphoteric/ambident nature has prevented the scientific community from exploiting their synthetic potential. Recently, we have developed an in situ formation approach using a reversible equilibrium, which allows controlled generation and reactivity of N-isocyanates and prevents the dimerization that is typically observed with these intermediates. This blocked (masked) N-isocyanate approach enables the use of various N-isocyanate precursors to assemble heterocycles possessing the N-N-C[double bond, length as m-dash]O motif, which is often found in agrochemicals and pharmaceuticals. Cascade reactions for the rapid assembly of several valuable 5- and 6-membered heterocycles are reported, including amino-hydantoins, acyl-pyrazoles, acyl-phthalazinones and azauracils. Over 100 different compounds were synthesized using amino-, imino- and amido-substituted N-isocyanates, demonstrating their potential as powerful intermediates in heterocyclic synthesis. Their reactivity also enables access to unprecedented bicyclic derivatives and to substitution patterns of azauracils that are difficult to access using known methods, illustrating that controlled reactivity of N-isocyanates provides new disconnections, and a new tool to assemble complex N-N-C[double bond, length as m-dash]O containing motifs.
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Affiliation(s)
- Jean-François Vincent-Rocan
- Centre for Catalysis Research and Innovation , Department of Chemistry and Biomolecular Sciences , University of Ottawa , 10 Marie-Curie , Ottawa , ON K1N 6N5 , Canada .
| | - Ryan A Ivanovich
- Centre for Catalysis Research and Innovation , Department of Chemistry and Biomolecular Sciences , University of Ottawa , 10 Marie-Curie , Ottawa , ON K1N 6N5 , Canada .
| | - Christian Clavette
- Centre for Catalysis Research and Innovation , Department of Chemistry and Biomolecular Sciences , University of Ottawa , 10 Marie-Curie , Ottawa , ON K1N 6N5 , Canada .
| | - Kyle Leckett
- Centre for Catalysis Research and Innovation , Department of Chemistry and Biomolecular Sciences , University of Ottawa , 10 Marie-Curie , Ottawa , ON K1N 6N5 , Canada .
| | - Julien Bejjani
- Centre for Catalysis Research and Innovation , Department of Chemistry and Biomolecular Sciences , University of Ottawa , 10 Marie-Curie , Ottawa , ON K1N 6N5 , Canada .
| | - André M Beauchemin
- Centre for Catalysis Research and Innovation , Department of Chemistry and Biomolecular Sciences , University of Ottawa , 10 Marie-Curie , Ottawa , ON K1N 6N5 , Canada .
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69
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Andreini M, Chapellas F, Diab S, Pasturaud K, Piettre SR, Legros J, Chataigner I. Addition of 4-(cyclohex-1-en-1-yl)morpholine on 3-nitroindole: an unprecedented dearomatizing process. Org Biomol Chem 2016; 14:2833-9. [DOI: 10.1039/c5ob02595h] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Nucleophilic enamine2aadd spontaneously on nitroindole1to form a dearomatized formal ene adduct3a.
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Affiliation(s)
| | | | - Sonia Diab
- Normandie Univ
- COBRA
- UMR 6014 et FR 3038
- Univ Rouen
- CNRS
| | | | | | - Julien Legros
- Normandie Univ
- COBRA
- UMR 6014 et FR 3038
- Univ Rouen
- CNRS
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70
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Loh J, Asad N, Samarakoon TB, Hanson PR. Modular, One-Pot, Sequential Aziridine Ring Opening-S(N)Ar Strategy to 7-, 10-, and 11-Membered Benzo-Fused Sultams. J Org Chem 2015; 80:9926-41. [PMID: 26446396 PMCID: PMC4943336 DOI: 10.1021/acs.joc.5b01429] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/23/2015] [Indexed: 12/12/2022]
Abstract
The generation of common and stereochemically rich medium-sized benzo-fused sultams via complementary pairing of heretofore-unknown (o-fluoroaryl)sulfonyl aziridine building blocks with an array of amino alcohols/amines in a modular one-pot, sequential protocol using an aziridine ring opening and intramolecular nucleophilic aromatic substitution is reported. The strategy employs a variety of amino alcohols/amines and proceeds with 6 + 4/6 + 5 and 6 + 1 cycloetherification pathways in a highly chemo- and regioselective fashion to obtain skeletally and structurally diverse, polycyclic, 10- to 11- and 7-membered benzo-fused sultams for broad-scale screening.
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Affiliation(s)
- Joanna
K. Loh
- Department of Chemistry, University
of Kansas, 1251 Wescoe
Hall Drive, Lawrence, Kansas 66045, United
States
- Center
for Chemical Methodologies
and Library Development (KU-CMLD), Delbert M. Shankel Structural Biology
Center, The University of Kansas, 2034 Becker Drive, Lawrence, Kansas 66047, United States
| | - Naeem Asad
- Department of Chemistry, University
of Kansas, 1251 Wescoe
Hall Drive, Lawrence, Kansas 66045, United
States
- Center
for Chemical Methodologies
and Library Development (KU-CMLD), Delbert M. Shankel Structural Biology
Center, The University of Kansas, 2034 Becker Drive, Lawrence, Kansas 66047, United States
| | - Thiwanka B. Samarakoon
- Department of Chemistry, University
of Kansas, 1251 Wescoe
Hall Drive, Lawrence, Kansas 66045, United
States
- Center
for Chemical Methodologies
and Library Development (KU-CMLD), Delbert M. Shankel Structural Biology
Center, The University of Kansas, 2034 Becker Drive, Lawrence, Kansas 66047, United States
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71
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St. Denis JD, He Z, Yudin AK. Amphoteric α-Boryl Aldehyde Linchpins in the Synthesis of Heterocycles. ACS Catal 2015. [DOI: 10.1021/acscatal.5b00790] [Citation(s) in RCA: 53] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Affiliation(s)
- Jeffrey D. St. Denis
- Davenport Research Laboratories,
Department of Chemistry, University of Toronto, 80 St. George Street, Toronto, Ontario, Canada M5S 3H6
| | - Zhi He
- Davenport Research Laboratories,
Department of Chemistry, University of Toronto, 80 St. George Street, Toronto, Ontario, Canada M5S 3H6
| | - Andrei K. Yudin
- Davenport Research Laboratories,
Department of Chemistry, University of Toronto, 80 St. George Street, Toronto, Ontario, Canada M5S 3H6
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72
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Zaretsky S, Hickey JL, Tan J, Pichugin D, St Denis MA, Ler S, Chung BKW, Scully CCG, Yudin AK. Mechanistic investigation of aziridine aldehyde-driven peptide macrocyclization: the imidoanhydride pathway. Chem Sci 2015; 6:5446-5455. [PMID: 29861887 PMCID: PMC5949604 DOI: 10.1039/c5sc01958c] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/01/2015] [Accepted: 07/07/2015] [Indexed: 01/30/2023] Open
Abstract
Aziridine aldehydes participate in a multicomponent reaction with α-amino amides and isocyanides to generate reactive imidoanhydride intermediates.
Aziridine aldehyde dimers, peptides, and isocyanides participate in a multicomponent reaction to yield peptide macrocycles. We have investigated the selectivity and kinetics of this process and performed a detailed analysis of its chemoselectivity. While the reactants encompass all of the elements of the traditional Ugi four-component condensation, there is a significant deviation from the previously proposed mechanism. Our results provide evidence for an imidoanhydride pathway in peptide macrocyclization and lend justification for the diastereoselectivity and high effective molarity observed in the reaction.
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Affiliation(s)
- Serge Zaretsky
- Davenport Research Laboratories , Department of Chemistry , University of Toronto , 80 St. George Street , Toronto , Ontario M5S 3H6 , Canada .
| | - Jennifer L Hickey
- Davenport Research Laboratories , Department of Chemistry , University of Toronto , 80 St. George Street , Toronto , Ontario M5S 3H6 , Canada . .,Encycle Therapeutics Inc. , 101 College Street, Suite 314 , Toronto , Ontario M5G 1L7 , Canada
| | - Joanne Tan
- Davenport Research Laboratories , Department of Chemistry , University of Toronto , 80 St. George Street , Toronto , Ontario M5S 3H6 , Canada .
| | - Dmitry Pichugin
- Center for Structural Investigations of Complex Organic Molecules and Polymers , Department of Chemistry , University of Toronto , 80 St. George Street , Toronto , Ontario M5S 3H6 , Canada
| | - Megan A St Denis
- Davenport Research Laboratories , Department of Chemistry , University of Toronto , 80 St. George Street , Toronto , Ontario M5S 3H6 , Canada . .,Encycle Therapeutics Inc. , 101 College Street, Suite 314 , Toronto , Ontario M5G 1L7 , Canada
| | - Spencer Ler
- Davenport Research Laboratories , Department of Chemistry , University of Toronto , 80 St. George Street , Toronto , Ontario M5S 3H6 , Canada .
| | - Benjamin K W Chung
- Davenport Research Laboratories , Department of Chemistry , University of Toronto , 80 St. George Street , Toronto , Ontario M5S 3H6 , Canada .
| | - Conor C G Scully
- Davenport Research Laboratories , Department of Chemistry , University of Toronto , 80 St. George Street , Toronto , Ontario M5S 3H6 , Canada .
| | - Andrei K Yudin
- Davenport Research Laboratories , Department of Chemistry , University of Toronto , 80 St. George Street , Toronto , Ontario M5S 3H6 , Canada .
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73
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Eberlin L, Carboni B, Whiting A. Regioisomeric and Substituent Effects upon the Outcome of the Reaction of 1-Borodienes with Nitrosoarene Compounds. J Org Chem 2015; 80:6574-83. [PMID: 26039269 DOI: 10.1021/acs.joc.5b00593] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
A study of the reactivity of 1-borodienes with nitrosoarene compounds has been carried out showing an outcome that differs according to the hybridization state of the boron moiety. Using an sp(2) boron substituent, a one-pot hetero-Diels-Alder/ring contraction cascade occurred to afford N-arylpyrroles with low to good yields depending on the electronic properties of the substituents on the borodiene, whereas an sp(3) boron substituent led to the formation of stable boro-oxazines with high regioselectivity in most of the cases, in moderate to good yields. (1)H and (11)B NMR studies on two boro-oxazine regioisomers showed that selective deprotection can be performed. Formation of either the pyrrole or the furan derivative is pH- and regioisomer-structure-dependent. The results obtained, together with previous B3LYP calculations, support mechanistic proposals which suggest that pyrrole, or furan, formation proceeds via oxazine formation, followed by a boryl rearrangement and an intramolecular addition-elimination sequence.
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Affiliation(s)
- Ludovic Eberlin
- †Institut des Sciences Chimiques de Rennes, UMR 6226 CNRS-Université de Rennes 1, Campus de Beaulieu, CS 74205, 35042 Rennes Cedex, France.,‡Centre for Sustainable Chemical Processes, Department of Chemistry, Durham University, South Road, Durham DH1 3LE, U. K
| | - Bertrand Carboni
- †Institut des Sciences Chimiques de Rennes, UMR 6226 CNRS-Université de Rennes 1, Campus de Beaulieu, CS 74205, 35042 Rennes Cedex, France
| | - Andrew Whiting
- ‡Centre for Sustainable Chemical Processes, Department of Chemistry, Durham University, South Road, Durham DH1 3LE, U. K
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74
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Trinchera P, Corless VB, Yudin AK. Synthesis of Previously Inaccessible Borylated Heterocycle Motifs Using Novel Boron-Containing Amphoteric Molecules. Angew Chem Int Ed Engl 2015; 54:9038-41. [DOI: 10.1002/anie.201504271] [Citation(s) in RCA: 34] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/10/2015] [Indexed: 01/05/2023]
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75
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Trinchera P, Corless VB, Yudin AK. Synthesis of Previously Inaccessible Borylated Heterocycle Motifs Using Novel Boron-Containing Amphoteric Molecules. Angew Chem Int Ed Engl 2015. [DOI: 10.1002/ange.201504271] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
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76
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Quiclet-Sire B, Zard SZ. Radical Instability in Aid of Efficiency: A Powerful Route to Highly Functional MIDA Boronates. J Am Chem Soc 2015; 137:6762-5. [DOI: 10.1021/jacs.5b03893] [Citation(s) in RCA: 68] [Impact Index Per Article: 7.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Affiliation(s)
- Béatrice Quiclet-Sire
- Laboratoire de Synthèse
Organique, CNRS UMR 7652, Ecole Polytechnique, 91128 Palaiseau
Cedex, France
| | - Samir Z. Zard
- Laboratoire de Synthèse
Organique, CNRS UMR 7652, Ecole Polytechnique, 91128 Palaiseau
Cedex, France
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78
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79
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St Denis JD, Zajdlik A, Tan J, Trinchera P, Lee CF, He Z, Adachi S, Yudin AK. Boron-containing enamine and enamide linchpins in the synthesis of nitrogen heterocycles. J Am Chem Soc 2014; 136:17669-73. [PMID: 25422871 DOI: 10.1021/ja510963k] [Citation(s) in RCA: 60] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Abstract
The use of α-boryl enamine and enamide linchpins in the synthesis of nitrogen heterocycles has been demonstrated. Boryl enamines provide ready access to the corresponding α-halo aldehydes, which undergo regioselective annulation to form borylated thiazoles. A condensation/amidation sequence converts α-boryl aldehydes into stable α-boryl enamides without concomitant C → N migration. We also show that palladium-catalyzed cyclization of α-boryl enamides leads to synthetically versatile isoindolones. These molecules can be subsequently used to access polycyclic scaffolds.
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Affiliation(s)
- Jeffrey D St Denis
- Davenport Research Laboratories, Department of Chemistry, University of Toronto , 80 St. George Street, Toronto, Ontario, Canada M5S 3H6
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80
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Erős G, Kushida Y, Bode JW. A Reagent for the One-Step Preparation of Potassium Acyltrifluoroborates (KATs) from Aryl- and Heteroarylhalides. Angew Chem Int Ed Engl 2014; 53:7604-7. [DOI: 10.1002/anie.201403931] [Citation(s) in RCA: 59] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/02/2014] [Indexed: 01/22/2023]
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81
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Erős G, Kushida Y, Bode JW. A Reagent for the One-Step Preparation of Potassium Acyltrifluoroborates (KATs) from Aryl- and Heteroarylhalides. Angew Chem Int Ed Engl 2014. [DOI: 10.1002/ange.201403931] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
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82
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He Z, Zajdlik A, Yudin AK. α-Borylcarbonyl compounds: from transient intermediates to robust building blocks. Dalton Trans 2014; 43:11434-51. [DOI: 10.1039/c4dt00817k] [Citation(s) in RCA: 48] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
Various aspects of α-borylcarbonyl chemistry are discussed including transient intermediate detection, stable molecule preparation, and their applications in organic synthesis.
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Affiliation(s)
- Zhi He
- Davenport Research Laboratories
- Department of Chemistry
- University of Toronto
- Toronto M5S 3H6, Canada
| | - Adam Zajdlik
- Davenport Research Laboratories
- Department of Chemistry
- University of Toronto
- Toronto M5S 3H6, Canada
| | - Andrei K. Yudin
- Davenport Research Laboratories
- Department of Chemistry
- University of Toronto
- Toronto M5S 3H6, Canada
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