1
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Yang D, Zhang S, Zeng G, Chen ZX. Metal-free catalytic hydroboration of imine with pinacolborane using a pincer-type phosphorus compound: mechanistic insight and improvement of the reaction. Phys Chem Chem Phys 2023. [PMID: 37378853 DOI: 10.1039/d3cp01709e] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/29/2023]
Abstract
A mechanistic study of the catalytic hydroboration of imine using a pincer-type phosphorus compound 1NP was performed through the combination of DFT and DLPNO-CCSD(T) calculations. The reaction proceeds through a phosphorus-ligand cooperative catalytic cycle, where the phosphorus center and triamide ligand work in a synergistic manner. First, the pinB-H bond activation by 1NP occurs through the cooperative functions of the phosphorus center and the triamide ligand, leading to a phosphorus-hydride intermediate 2NP. This is the rate-determining step, with the Gibbs energy barrier and Gibbs reaction energy of 25.3 and -17.0 kcal mol-1, respectively. Subsequently, the hydroboration of phenylmethanimine takes place through a concerted transition state through the cooperative function of the phosphorus center and the triamide ligand. It leads to the final hydroborated product 4 with the regeneration of 1NP. Our computational results reveal that the experimentally isolated intermediate 3NP is a resting state of the reaction. It is formed through the B-N bond activation of 4 by 1NP, rather than via the insertion of the CN double bond of phenylmethanimine into the P-H bond of 2NP. However, this side reaction can be suppressed by utilizing a planar phosphorus compound AcrDipp-1NP as the catalyst, which features steric-demanding substituents on the chelated N atom of the ligand.
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Affiliation(s)
- Deshuai Yang
- Institute of Theoretical and Computational Chemistry, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210023, People's Republic of China.
- Kuang Yaming Honors School, Nanjing University, Nanjing 210023, People's Republic of China.
| | - Shuoqi Zhang
- Kuang Yaming Honors School, Nanjing University, Nanjing 210023, People's Republic of China.
| | - Guixiang Zeng
- Kuang Yaming Honors School, Nanjing University, Nanjing 210023, People's Republic of China.
| | - Zhao-Xu Chen
- Institute of Theoretical and Computational Chemistry, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210023, People's Republic of China.
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2
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Wu Z, He H, Chen M, Zhu L, Zheng W, Cao Y, Antilla JC. Asymmetric Reductive Amination with Pinacolborane Catalyzed by Chiral SPINOL Borophosphates. Org Lett 2022; 24:9436-9441. [PMID: 36519791 DOI: 10.1021/acs.orglett.2c03866] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
The catalytic asymmetric reductive amination of ketones with pinacolborane employing chiral SPINOL-derived borophosphates as catalysts has been realized. A series of chiral amine derivatives bearing multiple functional groups were obtained in good to excellent yields and enantioselectivities (up to 97% yield, 98% ee) under mild reaction conditions. Moreover, the synthetic applicability of the established method has been demonstrated by the asymmetric synthesis of (R)-Fendiline.
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Affiliation(s)
- Zhenwei Wu
- Department of Chemistry, Zhejiang Sci-Tech University, Hangzhou, Zhejiang 310018, P. R. China
| | - Hualing He
- Department of Chemistry, Zhejiang Sci-Tech University, Hangzhou, Zhejiang 310018, P. R. China
| | - Minglei Chen
- Department of Chemistry, Zhejiang Sci-Tech University, Hangzhou, Zhejiang 310018, P. R. China
| | - Linfei Zhu
- Department of Chemistry, Zhejiang Sci-Tech University, Hangzhou, Zhejiang 310018, P. R. China
| | - Weitao Zheng
- Department of Chemistry, Zhejiang Sci-Tech University, Hangzhou, Zhejiang 310018, P. R. China
| | - Yang Cao
- Jiangsu Key Laboratory of Marine Pharmaceutical Compound Screening, Jiangsu Ocean University, Lianyungang, Jiangsu222005, P. R. China
| | - Jon C Antilla
- Department of Chemistry, Zhejiang Sci-Tech University, Hangzhou, Zhejiang 310018, P. R. China
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3
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Caballero-García G, Goodman JM. N-Triflylphosphoramides: highly acidic catalysts for asymmetric transformations. Org Biomol Chem 2021; 19:9565-9618. [PMID: 34723293 DOI: 10.1039/d1ob01708j] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Abstract
N-Triflylphosphoramides (NTPA), have become increasingly popular catalysts in the development of enantioselective transformations as they are stronger Brønsted acids than the corresponding phosphoric acids (PA). Their highly acidic, asymmetric active site can activate difficult, unreactive substrates. In this review, we present an account of asymmetric transformations using this type of catalyst that have been reported in the past ten years and we classify these reactions using the enantio-determining step as the key criterion. This compendium of NTPA-catalysed reactions is organised into the following categories: (1) cycloadditions, (2) electrocyclisations, polyene and related cyclisations, (3) addition reactions to imines, (4) electrophilic aromatic substitutions, (5) addition reactions to carbocations, (6) aldol and related reactions, (7) addition reactions to double bonds, and (8) rearrangements and desymmetrisations. We highlight the use of NTPA in total synthesis and suggest mnemonics which account for their enantioselectivity.
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Affiliation(s)
| | - Jonathan M Goodman
- Yusuf Hamied Department of Chemistry, University of Cambridge, Lensfield Road, CB2 1EW, Cambridge, UK.
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4
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He H, Tang X, Cao Y, Antilla JC. Catalytic Asymmetric Reduction of α-Trifluoromethylated Imines with Catecholborane by BINOL-Derived Boro-phosphates. J Org Chem 2021; 86:4336-4345. [PMID: 33586987 DOI: 10.1021/acs.joc.0c03009] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
A catalytic enantioselective reduction of α-trifluoromethylated imines by a BINOL-derived boro-phosphate employing catecholborane as hydride source has been developed. This method provides an efficient route to prepare synthetically useful chiral α-trifluoromethylated amines in high yields and with excellent enantioselectivities (up to 98% yield and 96% ee) under mild conditions.
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Affiliation(s)
- Hualing He
- Institute for Molecular Design and Synthesis, School of Pharmaceutical Science and Technology, Tianjin University, Tianjin 300072, People's Republic of China
| | - Xiaoxue Tang
- Institute for Molecular Design and Synthesis, School of Pharmaceutical Science and Technology, Tianjin University, Tianjin 300072, People's Republic of China
| | - Yang Cao
- Jiangsu Key Laboratory of Marine Pharmaceutical Compound Screening, Jiangsu Ocean University, Lianyungang 222005, People's Republic of China
| | - Jon C Antilla
- Institute for Molecular Design and Synthesis, School of Pharmaceutical Science and Technology, Tianjin University, Tianjin 300072, People's Republic of China
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5
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Abstract
Diazaphospholenes have recently emerged as main-group hydride transfer catalysts. This review will briefly summarize the common structural variants of diazaphospholenes, and the properties that make them superb hydride transfer catalysts, followed by a critical examination of the various preparative routes toward diazaphospholenes. Finally, an in-depth examination of the reactivity of diazaphospholenes in contemporary catalysis, including asymmetric catalysis will be undertaken.
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Affiliation(s)
- Alexander W H Speed
- Department of Chemistry, Dalhousie University, Halifax, Nova Scotia, CanadaB3H 4R2.
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6
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Cao Y, Zhang S, Antilla JC. Catalytic Asymmetric 1,4-Reduction of α-Branched 2-Vinyl-azaarenes by a Chiral SPINOL-Derived Borophosphate. ACS Catal 2020. [DOI: 10.1021/acscatal.0c02563] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Yang Cao
- Institute for Molecular Design and Synthesis, School of Pharmaceutical Science and Technology, Tianjin University, Tianjin 300072, P. R. China
| | - Shouqi Zhang
- Institute for Molecular Design and Synthesis, School of Pharmaceutical Science and Technology, Tianjin University, Tianjin 300072, P. R. China
| | - Jon C. Antilla
- Institute for Molecular Design and Synthesis, School of Pharmaceutical Science and Technology, Tianjin University, Tianjin 300072, P. R. China
- School of Sciences, Zhejiang Sci-Tech University, Hangzhou City, Zhejiang Province 310018, P. R. China
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7
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List B, Wakchaure VN, Obradors C. Chiral Brønsted Acids Catalyze Asymmetric Additions to Substrates that Are Already Protonated: Highly Enantioselective Disulfonimide-Catalyzed Hantzsch Ester Reductions of NH–Imine Hydrochloride Salts. Synlett 2020. [DOI: 10.1055/s-0040-1706413] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
Abstract
While imines are frequently used substrates in asymmetric Brønsted acid catalysis, their corresponding salts are generally considered unsuitable reaction partners. Such processes are challenging because they require the successful competition of a catalytic amount of a chiral anion with a stoichiometric amount of an achiral one. We now show that enantiopure disulfonimides enable the asymmetric reduction of N–H imine hydrochloride salts using Hantzsch esters as hydrogen source. Our scalable reaction delivers crystalline primary amine salts in great efficiency and enantioselectivity and the discovery suggests potential of this approach in other Brønsted acid catalyzed transformations of achiral iminium salts. Kinetic studies and acidity data suggest a bifunctional catalytic activation mode.
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8
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Na F, Lopez SS, Beauseigneur A, Hernandez LW, Sun Z, Antilla JC. Catalytic Asymmetric Transfer Hydrogenation of trans-Chalcone Derivatives Using BINOL-derived Boro-phosphates. Org Lett 2020; 22:5953-5957. [PMID: 32692927 DOI: 10.1021/acs.orglett.0c02042] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Chiral phosphoric-acid-catalyzed asymmetric reductions of trans-chalcones have been investigated in this work. A BINOL-derived boro-phosphate-catalyzed asymmetric transfer hydrogenation of the carbon-carbon double bond of trans-chalcone derivatives employing borane as a hydride source was realized. This methodology provides a convenient procedure to access chiral dihydrochalone derivatives in high yields and with high enantioselectivities under mild conditions.
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Affiliation(s)
- Fei Na
- Institute for Molecular Design and Synthesis, School of Pharmaceutical Science and Technology, Tianjin University, Tianjin 300072, China
| | - Susana S Lopez
- Department of Chemistry, University of South Florida, Tampa, Florida 33620, United States
| | - Alice Beauseigneur
- Department of Chemistry, University of South Florida, Tampa, Florida 33620, United States
| | - Lucas W Hernandez
- Department of Chemistry, University of South Florida, Tampa, Florida 33620, United States
| | - Zhuoxin Sun
- Institute for Molecular Design and Synthesis, School of Pharmaceutical Science and Technology, Tianjin University, Tianjin 300072, China
| | - Jon C Antilla
- Institute for Molecular Design and Synthesis, School of Pharmaceutical Science and Technology, Tianjin University, Tianjin 300072, China
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9
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Pandey VK, Donthireddy SNR, Rit A. Catalyst-Free and Solvent-Free Facile Hydroboration of Imines. Chem Asian J 2019; 14:3255-3258. [PMID: 31430049 DOI: 10.1002/asia.201901016] [Citation(s) in RCA: 28] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/25/2019] [Revised: 08/19/2019] [Indexed: 11/06/2022]
Abstract
A facile process for the catalyst-free and solvent-free hydroboration of aromatic as well as heteroaromatic imines is reported. This atom-economic methodology is scalable, compatible with sterically and electronically diverse imines, displaying excellent tolerance towards various functional groups, and works efficiently at ambient temperature in most of the cases, affording secondary amines in good to excellent yield after hydrolysis.
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Affiliation(s)
- Vipin K Pandey
- Department of Chemistry, Indian Institute of Technology Madras, Chennai-, 600036, India
| | | | - Arnab Rit
- Department of Chemistry, Indian Institute of Technology Madras, Chennai-, 600036, India
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10
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Lundrigan T, Welsh EN, Hynes T, Tien CH, Adams MR, Roy KR, Robertson KN, Speed AWH. Enantioselective Imine Reduction Catalyzed by Phosphenium Ions. J Am Chem Soc 2019; 141:14083-14088. [PMID: 31441650 DOI: 10.1021/jacs.9b07293] [Citation(s) in RCA: 49] [Impact Index Per Article: 9.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
The first use of phosphenium cations in asymmetric catalysis is reported. A diazaphosphenium triflate, prepared in two or three steps on a multigram scale from commercially available materials, catalyzes the hydroboration or hydrosilylation of cyclic imines with enantiomeric ratios of up to 97:3. Catalyst loadings are as low as 0.2 mol %. Twenty-two aryl/heteroaryl pyrrolidines and piperidines were prepared using this method. Imines containing functional groups such as thiophenes or pyridyl rings that can challenge transition-metal catalysts were reduced employing these systems.
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Affiliation(s)
- Travis Lundrigan
- Department of Chemistry , Dalhousie University , Halifax , Nova Scotia , Canada B3H 4R2
| | - Erin N Welsh
- Department of Chemistry , Dalhousie University , Halifax , Nova Scotia , Canada B3H 4R2
| | - Toren Hynes
- Department of Chemistry , Dalhousie University , Halifax , Nova Scotia , Canada B3H 4R2
| | - Chieh-Hung Tien
- Department of Chemistry , Dalhousie University , Halifax , Nova Scotia , Canada B3H 4R2
| | - Matt R Adams
- Department of Chemistry , Dalhousie University , Halifax , Nova Scotia , Canada B3H 4R2
| | - Kayelani R Roy
- Department of Chemistry , Dalhousie University , Halifax , Nova Scotia , Canada B3H 4R2
| | - Katherine N Robertson
- Department of Chemistry , Saint Mary's University , Halifax , Nova Scotia , Canada B3H 3C3
| | - Alexander W H Speed
- Department of Chemistry , Dalhousie University , Halifax , Nova Scotia , Canada B3H 4R2
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11
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Huchenski BSN, Speed AWH. Protic additives or impurities promote imine reduction with pinacolborane. Org Biomol Chem 2019; 17:1999-2004. [PMID: 30426130 DOI: 10.1039/c8ob02330a] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
Abstract
We report here that addition of stoichiometric amounts of alcohols or water to mixtures of imines and pinacolborane promote reduction reactions. The reactions of several imines were examined, revealing that alkyl imines were reduced, while aniline derived imines were not effectively reduced. The use of binol as an additive resulted in modest enantioinduction, however other chiral additives that were screened gave negligible enantioinduction. While the reactions described herein are not competitive in conversion with established imine reduction technologies, this work reveals that the presence of protic impurities must be considered as a promoter of side reactions in catalyzed imine hydroborations. Amines also promote imine reduction in certain cases, raising the possibility of a slow autocatalytic reaction. The ability of water or other protic impurities to promote the reduction of imines with pinacolborane represents an important identification of a potential source of background reaction in catalyzed reductions of imines.
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Affiliation(s)
- Blake S N Huchenski
- Department of Chemistry, Dalhousie University, 6274 Coburg Road, Halifax, Nova Scotia, CanadaB3H 4R2.
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12
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Zhang Y, He L, Shi L. Chiral Ion-Pair Organocatalyst-Promoted Efficient Enantio-selective Reduction of α-Hydroxy Ketones. Adv Synth Catal 2018. [DOI: 10.1002/adsc.201800053] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Yiliang Zhang
- Shenzhen Graduate School; Harbin Institute of Technology; Shenzhen 518055 People's Republic of China
- MIIT Key Laboratory of Critical Materials Technology for New Energy Conversion and Storage, School of Chemistry and Chemical Engineering; Harbin Institute of Technology; Harbin 150001 People's Republic of China
| | - Li He
- Shenzhen Graduate School; Harbin Institute of Technology; Shenzhen 518055 People's Republic of China
- MIIT Key Laboratory of Critical Materials Technology for New Energy Conversion and Storage, School of Chemistry and Chemical Engineering; Harbin Institute of Technology; Harbin 150001 People's Republic of China
| | - Lei Shi
- Shenzhen Graduate School; Harbin Institute of Technology; Shenzhen 518055 People's Republic of China
- MIIT Key Laboratory of Critical Materials Technology for New Energy Conversion and Storage, School of Chemistry and Chemical Engineering; Harbin Institute of Technology; Harbin 150001 People's Republic of China
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13
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Adams MR, Tien CH, McDonald R, Speed AWH. Asymmetric Imine Hydroboration Catalyzed by Chiral Diazaphospholenes. Angew Chem Int Ed Engl 2017; 56:16660-16663. [DOI: 10.1002/anie.201709926] [Citation(s) in RCA: 50] [Impact Index Per Article: 7.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/25/2017] [Indexed: 01/03/2023]
Affiliation(s)
- Matt R. Adams
- Department of Chemistry; Dalhousie University; Halifax, Nova Scotia B3H 4R2 Canada
| | - Chieh-Hung Tien
- Department of Chemistry; Dalhousie University; Halifax, Nova Scotia B3H 4R2 Canada
| | - Robert McDonald
- X-ray Crystallography Laboratory; Department of Chemistry; University of Alberta; Edmonton Alberta T6G 2G2 Canada
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14
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Adams MR, Tien CH, McDonald R, Speed AWH. Asymmetric Imine Hydroboration Catalyzed by Chiral Diazaphospholenes. Angew Chem Int Ed Engl 2017. [DOI: 10.1002/ange.201709926] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Affiliation(s)
- Matt R. Adams
- Department of Chemistry; Dalhousie University; Halifax, Nova Scotia B3H 4R2 Canada
| | - Chieh-Hung Tien
- Department of Chemistry; Dalhousie University; Halifax, Nova Scotia B3H 4R2 Canada
| | - Robert McDonald
- X-ray Crystallography Laboratory; Department of Chemistry; University of Alberta; Edmonton Alberta T6G 2G2 Canada
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15
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Tien CH, Adams MR, Ferguson MJ, Johnson ER, Speed AWH. Hydroboration Catalyzed by 1,2,4,3-Triazaphospholenes. Org Lett 2017; 19:5565-5568. [DOI: 10.1021/acs.orglett.7b02695] [Citation(s) in RCA: 38] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Chieh-Hung Tien
- Department
of Chemistry, Dalhousie University, 6274 Coburg Road, P.O. Box 15000, Halifax, Nova Scotia, Canada B3H 4R2
| | - Matt R. Adams
- Department
of Chemistry, Dalhousie University, 6274 Coburg Road, P.O. Box 15000, Halifax, Nova Scotia, Canada B3H 4R2
| | - Michael J. Ferguson
- X-ray
Crystallography Laboratory, Department of Chemistry, University of Alberta, Edmonton, Alberta, Canada T6G 2G2
| | - Erin R. Johnson
- Department
of Chemistry, Dalhousie University, 6274 Coburg Road, P.O. Box 15000, Halifax, Nova Scotia, Canada B3H 4R2
| | - Alexander W. H. Speed
- Department
of Chemistry, Dalhousie University, 6274 Coburg Road, P.O. Box 15000, Halifax, Nova Scotia, Canada B3H 4R2
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16
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Parmar D, Sugiono E, Raja S, Rueping M. Addition and Correction to Complete Field Guide to Asymmetric BINOL-Phosphate Derived Brønsted Acid and Metal Catalysis: History and Classification by Mode of Activation; Brønsted Acidity, Hydrogen Bonding, Ion Pairing, and Metal Phosphates. Chem Rev 2017; 117:10608-10620. [DOI: 10.1021/acs.chemrev.7b00197] [Citation(s) in RCA: 107] [Impact Index Per Article: 15.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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17
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Wang Q, Huang F, Jiang L, Sun C, Liu J, Chen D. A Mechanistic Insight into the Ligand-Controlled Asymmetric Arylation of Aliphatic α-Amino Anion Equivalents: Origin of Regio- and Enantioselectivities. Inorg Chem 2017; 56:5984-5992. [DOI: 10.1021/acs.inorgchem.7b00739] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Affiliation(s)
- Qiong Wang
- College of Chemistry, Chemical Engineering
and Materials Science, Collaborative Innovation Center of Functionalized
Probes for Chemical Imaging in Universities of Shandong, Key Laboratory
of Molecular and Nano Probes, Ministry of Education, Shandong Provincial
Key Laboratory of Clean Production of Fine Chemicals, Shandong Normal University, Jinan 250014, P. R. China
| | - Fang Huang
- College of Chemistry, Chemical Engineering
and Materials Science, Collaborative Innovation Center of Functionalized
Probes for Chemical Imaging in Universities of Shandong, Key Laboratory
of Molecular and Nano Probes, Ministry of Education, Shandong Provincial
Key Laboratory of Clean Production of Fine Chemicals, Shandong Normal University, Jinan 250014, P. R. China
| | - Langhuan Jiang
- College of Chemistry, Chemical Engineering
and Materials Science, Collaborative Innovation Center of Functionalized
Probes for Chemical Imaging in Universities of Shandong, Key Laboratory
of Molecular and Nano Probes, Ministry of Education, Shandong Provincial
Key Laboratory of Clean Production of Fine Chemicals, Shandong Normal University, Jinan 250014, P. R. China
| | - Chuanzhi Sun
- College of Chemistry, Chemical Engineering
and Materials Science, Collaborative Innovation Center of Functionalized
Probes for Chemical Imaging in Universities of Shandong, Key Laboratory
of Molecular and Nano Probes, Ministry of Education, Shandong Provincial
Key Laboratory of Clean Production of Fine Chemicals, Shandong Normal University, Jinan 250014, P. R. China
| | - Jianbiao Liu
- College of Chemistry, Chemical Engineering
and Materials Science, Collaborative Innovation Center of Functionalized
Probes for Chemical Imaging in Universities of Shandong, Key Laboratory
of Molecular and Nano Probes, Ministry of Education, Shandong Provincial
Key Laboratory of Clean Production of Fine Chemicals, Shandong Normal University, Jinan 250014, P. R. China
| | - Dezhan Chen
- College of Chemistry, Chemical Engineering
and Materials Science, Collaborative Innovation Center of Functionalized
Probes for Chemical Imaging in Universities of Shandong, Key Laboratory
of Molecular and Nano Probes, Ministry of Education, Shandong Provincial
Key Laboratory of Clean Production of Fine Chemicals, Shandong Normal University, Jinan 250014, P. R. China
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18
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Adams MR, Tien CH, Huchenski BSN, Ferguson MJ, Speed AWH. Diazaphospholene Precatalysts for Imine and Conjugate Reductions. Angew Chem Int Ed Engl 2017. [DOI: 10.1002/ange.201611570] [Citation(s) in RCA: 32] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Affiliation(s)
- Matt R. Adams
- Department of Chemistry; Dalhousie University; Halifax Nova Scotia B3H 4R2 Canada
| | - Chieh-Hung Tien
- Department of Chemistry; Dalhousie University; Halifax Nova Scotia B3H 4R2 Canada
| | | | - Michael J. Ferguson
- X-ray Crystallography Laboratory; Department of Chemistry, University of Alberta; Edmonton Alberta T6G 2G2 Canada
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19
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Diazaphospholene Precatalysts for Imine and Conjugate Reductions. Angew Chem Int Ed Engl 2017; 56:6268-6271. [DOI: 10.1002/anie.201611570] [Citation(s) in RCA: 77] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/27/2016] [Indexed: 01/03/2023]
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20
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Oroujzadeh N, Gholivand K, Jamalabadi NR. New carbacylamidophosphates containing nicotinamide: Synthesis, crystallography and antibacterial activity. Polyhedron 2017. [DOI: 10.1016/j.poly.2016.10.024] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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21
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Carlone A, Bernardi L. Diverse exploitation of Brønsted acid catalysts – paving the way for simple access to enantioenriched amines. Org Chem Front 2017. [DOI: 10.1039/c7qo00187h] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Brønsted acid catalysis provided access to enantioenriched primary and secondary amines, paving the way to advancements in the area.
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Affiliation(s)
| | - Luca Bernardi
- Department of Industrial Chemistry “Toso Montanari” and INSTM RU Bologna
- Alma Mater Studiorum – University of Bologna
- 40136 Bologna
- Italy
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22
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Wakchaure VN, List B. Katalytische asymmetrische reduktive Kondensation von N-H-Iminen: Synthese vonC2-symmetrischen sekundären Aminen. Angew Chem Int Ed Engl 2016. [DOI: 10.1002/ange.201608329] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Affiliation(s)
- Vijay N. Wakchaure
- Max-Planck-Institut für Kohlenforschung; Kaiser-Wilhelm-Platz 1 45470 Mülheim an der Ruhr Deutschland
| | - Benjamin List
- Max-Planck-Institut für Kohlenforschung; Kaiser-Wilhelm-Platz 1 45470 Mülheim an der Ruhr Deutschland
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23
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Wakchaure VN, List B. Catalytic Asymmetric Reductive Condensation of N-H Imines: Synthesis ofC2-Symmetric Secondary Amines. Angew Chem Int Ed Engl 2016; 55:15775-15778. [DOI: 10.1002/anie.201608329] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/25/2016] [Indexed: 12/29/2022]
Affiliation(s)
- Vijay N. Wakchaure
- Max-Planck-Institut für Kohlenforschung; Kaiser -Wilhelm-Platz 1 45470 Mülheim an der Ruhr Germany
| | - Benjamin List
- Max-Planck-Institut für Kohlenforschung; Kaiser -Wilhelm-Platz 1 45470 Mülheim an der Ruhr Germany
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24
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Graphene-supported NiPd alloy nanoparticles: A novel and highly efficient heterogeneous catalyst system for the reductive amination of aldehydes. ACTA ACUST UNITED AC 2015. [DOI: 10.1016/j.molcata.2015.08.022] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
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25
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Wakchaure VN, Kaib PSJ, Leutzsch M, List B. Disulfonimide‐Catalyzed Asymmetric Reduction of
N
‐Alkyl Imines. Angew Chem Int Ed Engl 2015; 54:11852-6. [DOI: 10.1002/anie.201504052] [Citation(s) in RCA: 76] [Impact Index Per Article: 8.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/04/2015] [Indexed: 12/22/2022]
Affiliation(s)
- Vijay N. Wakchaure
- Max‐Planck‐Institut für Kohlenforschung, Kaiser ‐Wilhelm‐Platz 1, 45470 Mülheim an der Ruhr (Germany)
| | - Philip S. J. Kaib
- Max‐Planck‐Institut für Kohlenforschung, Kaiser ‐Wilhelm‐Platz 1, 45470 Mülheim an der Ruhr (Germany)
| | - Markus Leutzsch
- Max‐Planck‐Institut für Kohlenforschung, Kaiser ‐Wilhelm‐Platz 1, 45470 Mülheim an der Ruhr (Germany)
| | - Benjamin List
- Max‐Planck‐Institut für Kohlenforschung, Kaiser ‐Wilhelm‐Platz 1, 45470 Mülheim an der Ruhr (Germany)
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26
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Wakchaure VN, Kaib PSJ, Leutzsch M, List B. Disulfonimid-katalysierte asymmetrische Reduktion vonN-Alkyliminen. Angew Chem Int Ed Engl 2015. [DOI: 10.1002/ange.201504052] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
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27
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Barrulas PC, Genoni A, Benaglia M, Burke AJ. Cinchona-Derived Picolinamides: Effective Organocatalysts for Stereoselective Imine Hydrosilylation. European J Org Chem 2014. [DOI: 10.1002/ejoc.201403180] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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28
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Parmar D, Sugiono E, Raja S, Rueping M. Complete field guide to asymmetric BINOL-phosphate derived Brønsted acid and metal catalysis: history and classification by mode of activation; Brønsted acidity, hydrogen bonding, ion pairing, and metal phosphates. Chem Rev 2014; 114:9047-153. [PMID: 25203602 DOI: 10.1021/cr5001496] [Citation(s) in RCA: 1519] [Impact Index Per Article: 151.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
Affiliation(s)
- Dixit Parmar
- Institute of Organic Chemistry, RWTH Aachen University , Landoltweg 1, 52074 Aachen, Germany
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29
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Rossi S, Benaglia M, Massolo E, Raimondi L. Organocatalytic strategies for enantioselective metal-free reductions. Catal Sci Technol 2014. [DOI: 10.1039/c4cy00033a] [Citation(s) in RCA: 64] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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30
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Enders D, Stöckel BA, Rembiak A. Enantio- and chemoselective Brønsted-acid/Mg(nBu)2 catalysed reduction of α-keto esters with catecholborane. Chem Commun (Camb) 2014; 50:4489-91. [DOI: 10.1039/c4cc00427b] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The first enantio- and chemoselective Brønsted-acid catalysed reduction of α-keto esters with catecholborane has been developed.
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Affiliation(s)
- Dieter Enders
- Institute of Organic Chemistry
- RWTH Aachen University
- 52074 Aachen, Germany
| | - Bianca A. Stöckel
- Institute of Organic Chemistry
- RWTH Aachen University
- 52074 Aachen, Germany
| | - Andreas Rembiak
- Institute of Organic Chemistry
- RWTH Aachen University
- 52074 Aachen, Germany
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31
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Wang XB, Li TZ, Sha F, Wu XY. Enantioselective Squaramide-Catalysed Domino Mannich-Cyclization Reaction of Isatin Imines. European J Org Chem 2013. [DOI: 10.1002/ejoc.201301350] [Citation(s) in RCA: 54] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/30/2023]
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32
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Enders D, Rembiak A, Stöckel BA. Chemo- and Enantioselective Brønsted Acid-Catalyzed Reduction of α-Imino Esters with Catecholborane. Adv Synth Catal 2013. [DOI: 10.1002/adsc.201300352] [Citation(s) in RCA: 29] [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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