1
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Hodson NJ, Takano S, Fanourakis A, Phipps RJ. Enantioselective Nitrene Transfer to Hydrocinnamyl Alcohols and Allylic Alcohols Enabled by Systematic Exploration of the Structure of Ion-Paired Rhodium Catalysts. J Am Chem Soc 2024; 146:22629-22641. [PMID: 39083568 PMCID: PMC11328136 DOI: 10.1021/jacs.4c07117] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 08/02/2024]
Abstract
This work describes highly enantioselective nitrene transfer to hydrocinnamyl alcohols (benzylic C-H amination) and allylic alcohols (aziridination) using ion-paired Rh (II,II) complexes based on anionic variants of Du Bois' esp ligand that are associated with cinchona alkaloid-derived chiral cations. Directed by a substrate hydroxyl group, our previous work with these complexes had not been able to achieve high enantioselectivity on these most useful short-chain compounds, and we overcame this challenge through a combination of catalyst design and modified conditions. A hypothesis that modulation of the linker between the anionic sulfonate group and the central arene spacer might provide a better fit for shorter chain length substrates led to the development of a new biaryl-containing scaffold, which has allowed a broad scope for both substrate classes to be realized for the first time. Furthermore, we describe a systematic structural "knockout" study on the cinchona alkaloid-derived chiral cation to elucidate which features are crucial for high enantioinduction. De novo synthesis of modified scaffolds led to the surprising finding that for high ee the quinoline nitrogen of the alkaloid is crucial, although its location within the heterocycle could be varied, even leading to a superior catalyst. The free hydroxyl is also crucial and should possess the naturally occurring diastereomeric configuration of the alkaloid. These findings underline the privileged nature of the cinchona alkaloid scaffold and provide insight into how these cations might be used in other catalysis contexts.
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Affiliation(s)
- Nicholas J Hodson
- Yusuf Hamied Department of Chemistry, University of Cambridge, Lensfield Road, Cambridge CB2 1EW, United Kingdom
| | - Shotaro Takano
- Yusuf Hamied Department of Chemistry, University of Cambridge, Lensfield Road, Cambridge CB2 1EW, United Kingdom
| | - Alexander Fanourakis
- Yusuf Hamied Department of Chemistry, University of Cambridge, Lensfield Road, Cambridge CB2 1EW, United Kingdom
| | - Robert J Phipps
- Yusuf Hamied Department of Chemistry, University of Cambridge, Lensfield Road, Cambridge CB2 1EW, United Kingdom
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2
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Docherty P, Kadarauch M, Mistry N, Phipps RJ. Application of sSPhos as a Chiral Ligand for Palladium-Catalyzed Asymmetric Allylic Alkylation. Org Lett 2024; 26:2862-2866. [PMID: 38147571 PMCID: PMC11020163 DOI: 10.1021/acs.orglett.3c04025] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/29/2023] [Revised: 12/18/2023] [Accepted: 12/20/2023] [Indexed: 12/28/2023]
Abstract
Palladium-catalyzed asymmetric allylic alkylation is a versatile method for C-C bond formation. Many established classes of chiral ligands can perform allylic alkylation reactions enantioselectively, but identification of new ligand classes remains important for future development of the field. We demonstrate that enantiopure sSPhos, a bifunctional chiral monophosphine ligand, when used as its tetrabutyl ammonium salt, is a highly effective ligand for a benchmark Pd-catalyzed allylic alkylation reaction. We explore the scope and limitations and perform experiments to probe the origin of selectivity. In contrast with reactions previously explored using enantiopure sSPhos, it appears that steric bulk around the sulfonate group is responsible for the high enantioselectivity in this case, rather than attractive noncovalent interactions.
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Affiliation(s)
- Philip
J. Docherty
- Yusuf
Hamied Department of Chemistry, University
of Cambridge, Lensfield Road, Cambridge CB2 1EW, U.K.
| | - Max Kadarauch
- Yusuf
Hamied Department of Chemistry, University
of Cambridge, Lensfield Road, Cambridge CB2 1EW, U.K.
| | - Nisha Mistry
- Drug
Substance Development, GSK, Stevenage SG1 2NY, U.K.
| | - Robert J. Phipps
- Yusuf
Hamied Department of Chemistry, University
of Cambridge, Lensfield Road, Cambridge CB2 1EW, U.K.
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3
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Richard F, Clark P, Hannam A, Keenan T, Jean A, Arseniyadis S. Pd-Catalysed asymmetric allylic alkylation of heterocycles: a user's guide. Chem Soc Rev 2024; 53:1936-1983. [PMID: 38206332 DOI: 10.1039/d3cs00856h] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2024]
Abstract
This review provides an in-depth analysis of recent advances and strategies employed in the Pd-catalysed asymmetric allylic alkylation (Pd-AAA) of nucleophilic prochiral heterocycles. The review is divided into sections each focused on a specific family of heterocycle, where optimisation data and reaction scope have been carefully analysed in order to bring forward specific reactivity and selectivity trends. The review eventually opens on how computer-based technologies could be used to predict an ideally matched catalytic system for any given substrate. This user-guide targets chemists from all horizons interested in running a Pd-AAA reaction for the preparation of highly enantioenriched heterocyclic compounds.
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Affiliation(s)
- François Richard
- Queen Mary University of London, Department of Chemistry, Mile End Road, E1 4NS, London, UK.
| | - Paul Clark
- Queen Mary University of London, Department of Chemistry, Mile End Road, E1 4NS, London, UK.
| | - Al Hannam
- Queen Mary University of London, Department of Chemistry, Mile End Road, E1 4NS, London, UK.
| | - Thomas Keenan
- Queen Mary University of London, Department of Chemistry, Mile End Road, E1 4NS, London, UK.
| | - Alexandre Jean
- Industrial Research Centre, Oril Industrie, 13 rue Desgenétais, 76210, Bolbec, France
| | - Stellios Arseniyadis
- Queen Mary University of London, Department of Chemistry, Mile End Road, E1 4NS, London, UK.
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4
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Yang L, Liang X, Ding Y, Li X, Li X, Zeng Q. Transition Metal-Catalyzed Enantioselective Synthesis of Chiral Five- and Six-Membered Benzo O-heterocycles. CHEM REC 2023; 23:e202300173. [PMID: 37401804 DOI: 10.1002/tcr.202300173] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/10/2023] [Revised: 06/22/2023] [Indexed: 07/05/2023]
Abstract
Enantiomerically enriched five- and six-membered benzo oxygen heterocycles are privileged architectures in functional organic molecules. Over the last several years, many effective methods have been established to access these compounds. However, comprehensive documents cover updated methodologies still in highly demand. In this review, recent transition metal catalyzed transformations lead to chiral five- and six-membered benzo oxygen heterocycles are presented. The mechanism and chirality transfer or control processes are also discussed in details.
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Affiliation(s)
- Lu Yang
- Key Laboratory of General Chemistry of the National Ethnic Affairs Commission, Key Laboratory of Pollution Control Chemistry and Environmental Functional Materials for Qinghai-Tibet Plateau of the National Ethnic Affairs Commission, School of Chemistry and Environment, Southwest Minzu University, Chengdu, 610041, People's Republic of China
| | - Xiayu Liang
- College of Materials, Chemistry & Chemical Engineering, Chengdu, 610059, People's Republic of China
| | - Yuyang Ding
- Key Laboratory of General Chemistry of the National Ethnic Affairs Commission, Key Laboratory of Pollution Control Chemistry and Environmental Functional Materials for Qinghai-Tibet Plateau of the National Ethnic Affairs Commission, School of Chemistry and Environment, Southwest Minzu University, Chengdu, 610041, People's Republic of China
| | - Xinran Li
- Key Laboratory of General Chemistry of the National Ethnic Affairs Commission, Key Laboratory of Pollution Control Chemistry and Environmental Functional Materials for Qinghai-Tibet Plateau of the National Ethnic Affairs Commission, School of Chemistry and Environment, Southwest Minzu University, Chengdu, 610041, People's Republic of China
| | - Xuefeng Li
- Key Laboratory of General Chemistry of the National Ethnic Affairs Commission, Key Laboratory of Pollution Control Chemistry and Environmental Functional Materials for Qinghai-Tibet Plateau of the National Ethnic Affairs Commission, School of Chemistry and Environment, Southwest Minzu University, Chengdu, 610041, People's Republic of China
| | - Qingle Zeng
- College of Materials, Chemistry & Chemical Engineering, Chengdu, 610059, People's Republic of China
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5
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Ermanis K, Gibson DC, Genov GR, Phipps RJ. Interrogating the Crucial Interactions at Play in the Chiral Cation-Directed Enantioselective Borylation of Arenes. ACS Catal 2023; 13:13043-13055. [PMID: 37822864 PMCID: PMC10563137 DOI: 10.1021/acscatal.3c03384] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/24/2023] [Revised: 08/28/2023] [Indexed: 10/13/2023]
Abstract
Rendering a common ligand scaffold anionic and then pairing it with a chiral cation represents an alternative strategy for developing enantioselective versions of challenging transformations, as has been recently demonstrated in the enantioselective borylation of arenes using a quinine-derived chiral cation. A significant barrier to the further generalization of this approach is the lack of understanding of the specific interactions involved between the cation, ligand, and substrate, given the complexity of the system. We have embarked on a detailed computational study probing the mechanism, the key noncovalent interactions involved, and potential origin of selectivity for the desymmetrizing borylation of two distinct classes of substrate. We describe a deconstructive, stepwise approach to tackling this complex challenge, which involves building up a detailed understanding of the pairwise components of the nominally three component system before combining together into the full 263-atom reactive complex. This approach has revealed substantial differences in the noncovalent interactions occurring at the stereodetermining transition state for C-H oxidative addition to iridium for the two substrate classes. Each substrate engages in a unique mixture of diverse interactions, a testament to the rich and privileged structure of the cinchona alkaloid-derived chiral cations. Throughout the study, experimental support is provided, and this culminates in the discovery that prochiral phosphine oxide substrates, lacking hydrogen bond donor functionality, can also give very encouraging levels of enantioselectivity, potentially through direct interactions with the chiral cation. We envisage that the findings in this study will spur further developments in using chiral cations as controllers in asymmetric transition-metal catalysis.
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Affiliation(s)
- Kristaps Ermanis
- School
of Chemistry, University of Nottingham, University Park, Nottingham NG7 2RD, United
Kingdom
| | - David C. Gibson
- Yusuf
Hamied Department of Chemistry, University
of Cambridge, Lensfield Road, Cambridge CB2 1EW, United Kingdom
| | - Georgi R. Genov
- Yusuf
Hamied Department of Chemistry, University
of Cambridge, Lensfield Road, Cambridge CB2 1EW, United Kingdom
| | - Robert J. Phipps
- Yusuf
Hamied Department of Chemistry, University
of Cambridge, Lensfield Road, Cambridge CB2 1EW, United Kingdom
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6
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Liu M, Zhang X, Bao R, Xiao F, Cen S, Zhang Z. Axially Chiral N,N-Ligand-Promoted Pd-Catalyzed Enantioselective Allylic Amination and Alkylation. Org Lett 2023; 25:5946-5950. [PMID: 37555731 DOI: 10.1021/acs.orglett.3c01972] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 08/10/2023]
Abstract
An axially chiral N,N-ligand developed from a [1,1'-binaphthalene]-2,2'-diol (BINOL)-based skeleton and phenanthroline is found to be capable of promoting Pd-catalyzed asymmetric allylic amination and alkylation of allyl acetates. The reaction is compatible with cyclic and acyclic secondary amines, primary aliphatic amines, malononitrile, and dialkyl malonates, affording the corresponding chiral products in up to 99% yield and with up to >99% enantiomeric excess.
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Affiliation(s)
- Miaomiao Liu
- School of Chemistry and Molecular Engineering, East China University of Science & Technology; Shanghai 200237, People's Republic of China
| | - Xiaotao Zhang
- School of Chemistry and Molecular Engineering, East China University of Science & Technology; Shanghai 200237, People's Republic of China
| | - Rongrong Bao
- School of Chemistry and Molecular Engineering, East China University of Science & Technology; Shanghai 200237, People's Republic of China
| | - Fangtao Xiao
- School of Chemistry and Molecular Engineering, East China University of Science & Technology; Shanghai 200237, People's Republic of China
| | - Shouyi Cen
- School of Chemistry and Molecular Engineering, East China University of Science & Technology; Shanghai 200237, People's Republic of China
| | - Zhipeng Zhang
- Key Laboratory for Advanced Materials and Joint International Research Laboratory of Precision Chemistry and Molecular Engineering, Feringa Nobel Prize Scientist Joint Research Center, Frontiers Science Center for Materiobiology and Dynamic Chemistry, School of Chemistry and Molecular Engineering, East China University of Science & Technology, Shanghai 200237, People's Republic of China
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7
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Atroposelective desymmetrization of 2-arylresorcinols via Tsuji-Trost allylation. Commun Chem 2023; 6:42. [PMID: 36841918 PMCID: PMC9968306 DOI: 10.1038/s42004-023-00839-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/14/2022] [Accepted: 02/13/2023] [Indexed: 02/27/2023] Open
Abstract
Palladium-catalyzed asymmetric allylic alkylation has proven to be a powerful method for the preparation of a wide variety of chiral molecules. However, the catalytic and atroposelective allylic alkylation is still rare and challenging, especially for biaryl substrates. Herein, we report the palladium-catalyzed desymmetric and atroposelective allylation, in which the palladium complex with a chiral phosphoramidite ligand enables desymmetrization of nucleophilic 2-arylresorcinols in a highly enantioselective manner. With the aid of the secondary kinetic resolution effect, a wide variety of substrates containing a hydroxymethyl group at the bottom aromatic ring are able to provide O-allylated products up to 98:2 er. Computational studies show an accessible quadrant of the allylpalladium complex and provide three plausible transition states with intra- or intermolecular hydrogen bonding. The energetically favorable transition state is in good agreement with the observed enantioselectivity and suggests that the catalytic reaction would proceed with an intramolecular hydrogen bond.
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8
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Bhardwaj S, Gopalakrishnan DK, Garg D, Vaitla J. Bidirectional Iterative Approach to Sequence-Defined Unsaturated Oligoesters. JACS AU 2023; 3:252-260. [PMID: 36711094 PMCID: PMC9875252 DOI: 10.1021/jacsau.2c00641] [Citation(s) in RCA: 8] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/23/2022] [Revised: 12/22/2022] [Accepted: 12/22/2022] [Indexed: 06/18/2023]
Abstract
Herein, we describe the development of a new strategy for the synthesis of unsaturated oligoesters via sequential metal- and reagent-free insertion of vinyl sulfoxonium ylides into the O-H bond of carboxylic acid. Like two directional coupling of amino acids (N- to C-terminal and C- to N-terminal) in peptide synthesis, the present approach offers a strategy in both directions to synthesize oligoesters. The sequential addition of the vinyl sulfoxonium ylide to the carboxylic acids (acid iteration sequence) in one direction and the sequential addition of the carboxylic acids to the vinyl sulfoxonium ylide (ylide iteration sequence) in another direction yield (Z)-configured unsaturated oligoesters. To perform this iteration, we have developed a highly regioselective insertion of vinyl sulfoxonium ylide into the X-H (X = O, N, C, S, halogen) bond of acids, thiols, phenols, amines, indoles, and halogen acids under metal-free reaction conditions. The insertion reaction is applied to a broad range of substrates (>50 examples, up to 99% yield) and eight iterative sequences. Mechanistic studies suggest that the rate-limiting step depends on the type of X-H insertion.
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9
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Qin H, Xie Q, He L. Diastereoselective synthesis of chroman bearing spirobenzofuranone scaffolds via oxa-Michael/1,6-conjugated addition of para-quinone methides with benzofuranone-type olefins. RSC Adv 2022; 12:16684-16687. [PMID: 35754894 PMCID: PMC9169491 DOI: 10.1039/d2ra03031d] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/13/2022] [Accepted: 05/29/2022] [Indexed: 12/17/2022] Open
Abstract
A simple and convenient cyclization of ortho-hydroxyphenyl-substituted para-quinone methides with benzofuran-2-one type active olefins via oxa-Michael/1,6-conjugated addition has been developed, which afforded an easy access to enriched functionalized chroman-spirobenzofuran-2-one scaffolds with good to excellent yields (up to 90%) and diastereoselectivities (up to >19 : 1 dr). This reaction provided an efficient method for constructing desired spirocyclic compounds combining both well-known heterocyclic pharmacophores chroman and benzofuran-2-one. Highly diastereoselective synthesis of spirocyclic compounds combining both well-known heterocyclic pharmacophores chroman and benzofuran-2-one.![]()
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Affiliation(s)
- Hongmei Qin
- College of Chemistry and Materials Engineering, Guiyang University, Guiyang, 550005, P. R. China
| | - Qimei Xie
- College of Chemistry and Chemical Engineering, China West Normal University, Nanchong, 637002, P. R. China
| | - Long He
- College of Chemistry and Materials Engineering, Guiyang University, Guiyang, 550005, P. R. China
- College of Chemistry and Chemical Engineering, China West Normal University, Nanchong, 637002, P. R. China
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10
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Liu LX, Huang WJ, Xie QX, Wu B, Yu CB, Zhou YG. Dynamic Kinetic Resolution of Flavonoids via Asymmetric Allylic Alkylation: Construction of Two Contiguous Stereogenic Centers on Nucleophiles. ACS Catal 2021. [DOI: 10.1021/acscatal.1c03732] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Affiliation(s)
- Li-Xia Liu
- State Key Laboratory of Catalysis, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, People’s Republic of China
- University of Chinese Academy of Sciences, Beijing 100049, People’s Republic of China
| | - Wen-Jun Huang
- State Key Laboratory of Catalysis, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, People’s Republic of China
| | - Qing-Xian Xie
- State Key Laboratory of Catalysis, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, People’s Republic of China
| | - Bo Wu
- State Key Laboratory of Catalysis, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, People’s Republic of China
| | - Chang-Bin Yu
- State Key Laboratory of Catalysis, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, People’s Republic of China
| | - Yong-Gui Zhou
- State Key Laboratory of Catalysis, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, People’s Republic of China
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11
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Qiu R, Kambe N, Tang Z, Tong Z, Yin SF. Recent Advances on Benzofuranones: Synthesis and Transformation via C–H Functionalization. SYNTHESIS-STUTTGART 2021. [DOI: 10.1055/a-1405-5761] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
Abstract
AbstractThe benzofuranone structure is important in many fields, such as natural products, pharmaceuticals, building blocks, antioxidants, and dyes. The efficient synthesis and transformation of benzofuranones have attracted great attention in organic synthesis. They can be synthesized by the Friedel–Crafts reaction and intramolecular dehydration ring-closing and transition-metal-catalyzed reactions, among others. Their direct utilization in the preparation of other functional molecules further enhance their application. Due to their low pK
a value and easy enolization, the transformation of benzofuranones via C(3)–H bond functionalization has been a hot issue since 2010. Herein, we highlight advances in the synthesis of benzofuranones and their transformation via C–H functionalization. Other transformations related to benzofuranones are also discussed.1 Introduction2 Synthesis of Benzofuranones3 C–H Functionalization of Benzofuranones4 Other Types of Reactions of Benzofuranones5 Conclusion and Outlook
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Affiliation(s)
- Renhua Qiu
- State Key Laboratory of Chemo/Biosensing and Chemometrics, Advanced Catalytic Engineering Research Center of the Ministry of Education, College of Chemistry and Chemical Engineering, Hunan University
| | - Nobuaki Kambe
- State Key Laboratory of Chemo/Biosensing and Chemometrics, Advanced Catalytic Engineering Research Center of the Ministry of Education, College of Chemistry and Chemical Engineering, Hunan University
- The Institute of Scientific and Industrial Research, Osaka University
| | - Zhi Tang
- State Key Laboratory of Chemo/Biosensing and Chemometrics, Advanced Catalytic Engineering Research Center of the Ministry of Education, College of Chemistry and Chemical Engineering, Hunan University
- Key Laboratory of Ministry of Education for Advanced Materials in Tropical Island Resources Hainan Provincial Key Lab of Fine Chem, Hainan University
| | - Zhou Tong
- State Key Laboratory of Chemo/Biosensing and Chemometrics, Advanced Catalytic Engineering Research Center of the Ministry of Education, College of Chemistry and Chemical Engineering, Hunan University
| | - Shuang-Feng Yin
- State Key Laboratory of Chemo/Biosensing and Chemometrics, Advanced Catalytic Engineering Research Center of the Ministry of Education, College of Chemistry and Chemical Engineering, Hunan University
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12
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Fanourakis A, Williams BD, Paterson KJ, Phipps RJ. Enantioselective Intermolecular C-H Amination Directed by a Chiral Cation. J Am Chem Soc 2021; 143:10070-10076. [PMID: 34181401 PMCID: PMC8283762 DOI: 10.1021/jacs.1c05206] [Citation(s) in RCA: 25] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
The enantioselective amination of C(sp3)-H bonds is a powerful synthetic transformation yet highly challenging to achieve in an intermolecular sense. We have developed a family of anionic variants of the best-in-class catalyst for Rh-catalyzed C-H amination, Rh2(esp)2, with which we have associated chiral cations derived from quaternized cinchona alkaloids. These ion-paired catalysts enable high levels of enantioselectivity to be achieved in the benzylic C-H amination of substrates bearing pendant hydroxyl groups. Additionally, the quinoline of the chiral cation appears to engage in axial ligation to the rhodium complex, providing improved yields of product versus Rh2(esp)2 and highlighting the dual role that the cation is playing. These results underline the potential of using chiral cations to control enantioselectivity in challenging transition-metal-catalyzed transformations.
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Affiliation(s)
- Alexander Fanourakis
- Yusuf Hamied Department of Chemistry, University of Cambridge, Lensfield Road, Cambridge, CB2 1EW, United Kingdom
| | - Benjamin D Williams
- Yusuf Hamied Department of Chemistry, University of Cambridge, Lensfield Road, Cambridge, CB2 1EW, United Kingdom
| | - Kieran J Paterson
- Yusuf Hamied Department of Chemistry, University of Cambridge, Lensfield Road, Cambridge, CB2 1EW, United Kingdom
| | - Robert J Phipps
- Yusuf Hamied Department of Chemistry, University of Cambridge, Lensfield Road, Cambridge, CB2 1EW, United Kingdom
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13
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Pàmies O, Margalef J, Cañellas S, James J, Judge E, Guiry PJ, Moberg C, Bäckvall JE, Pfaltz A, Pericàs MA, Diéguez M. Recent Advances in Enantioselective Pd-Catalyzed Allylic Substitution: From Design to Applications. Chem Rev 2021; 121:4373-4505. [PMID: 33739109 PMCID: PMC8576828 DOI: 10.1021/acs.chemrev.0c00736] [Citation(s) in RCA: 212] [Impact Index Per Article: 70.7] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/14/2020] [Indexed: 12/30/2022]
Abstract
This Review compiles the evolution, mechanistic understanding, and more recent advances in enantioselective Pd-catalyzed allylic substitution and decarboxylative and oxidative allylic substitutions. For each reaction, the catalytic data, as well as examples of their application to the synthesis of more complex molecules, are collected. Sections in which we discuss key mechanistic aspects for high selectivity and a comparison with other metals (with advantages and disadvantages) are also included. For Pd-catalyzed asymmetric allylic substitution, the catalytic data are grouped according to the type of nucleophile employed. Because of the prominent position of the use of stabilized carbon nucleophiles and heteronucleophiles, many chiral ligands have been developed. To better compare the results, they are presented grouped by ligand types. Pd-catalyzed asymmetric decarboxylative reactions are mainly promoted by PHOX or Trost ligands, which justifies organizing this section in chronological order. For asymmetric oxidative allylic substitution the results are grouped according to the type of nucleophile used.
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Affiliation(s)
- Oscar Pàmies
- Universitat
Rovira i Virgili, Departament de
Química Física i Inorgànica, C/Marcel·lí Domingo, 1, 43007 Tarragona, Spain
| | - Jèssica Margalef
- Universitat
Rovira i Virgili, Departament de
Química Física i Inorgànica, C/Marcel·lí Domingo, 1, 43007 Tarragona, Spain
| | - Santiago Cañellas
- Discovery
Sciences, Janssen Research and Development, Janssen-Cilag, S.A. Jarama 75A, 45007, Toledo, Spain
| | - Jinju James
- Centre
for Synthesis and Chemical Biology, School of Chemistry, University College Dublin, Belfield, Dublin 4, Ireland
| | - Eric Judge
- Centre
for Synthesis and Chemical Biology, School of Chemistry, University College Dublin, Belfield, Dublin 4, Ireland
| | - Patrick J. Guiry
- Centre
for Synthesis and Chemical Biology, School of Chemistry, University College Dublin, Belfield, Dublin 4, Ireland
| | - Christina Moberg
- KTH
Royal Institute of Technology, Department of Chemistry, Organic Chemistry, SE 100 44 Stockholm, Sweden
| | - Jan-E. Bäckvall
- Department
of Organic Chemistry, Arrhenius Laboratory, Stockholm University, SE 106 91 Stockholm, Sweden
| | - Andreas Pfaltz
- Department
of Chemistry, University of Basel. St. Johanns-Ring 19, 4056 Basel, Switzerland
| | - Miquel A. Pericàs
- Institute
of Chemical Research of Catalonia (ICIQ), The Barcelona Institute of Science and Technology, Av. Països Catalans 16, 43007 Tarragona, Spain
- Departament
de Química Inorgànica i Orgànica, Universitat de Barcelona. 08028 Barcelona, Spain
| | - Montserrat Diéguez
- Universitat
Rovira i Virgili, Departament de
Química Física i Inorgànica, C/Marcel·lí Domingo, 1, 43007 Tarragona, Spain
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14
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Liu P, Tung NT, Xu X, Yang J, Li F. N-Methylation of Amines with Methanol in the Presence of Carbonate Salt Catalyzed by a Metal-Ligand Bifunctional Ruthenium Catalyst [( p-cymene)Ru(2,2'-bpyO)(H 2O)]. J Org Chem 2021; 86:2621-2631. [PMID: 33502847 DOI: 10.1021/acs.joc.0c02685] [Citation(s) in RCA: 24] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
Abstract
A ruthenium complex [(p-cymene)Ru(2,2'-bpyO)(H2O)] was found to be a general and efficient catalyst for the N-methylation of amines with methanol in the presence of carbonate salt. Moreover, a series of sensitive substituents, such as nitro, ester, cyano, and vinyl groups, were tolerated under present conditions. It was confirmed that OH units in the ligand are crucial for the catalytic activity. Notably, this research exhibited the potential of metal-ligand bifunctional ruthenium catalysts for the hydrogen autotransfer process.
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Affiliation(s)
- Peng Liu
- School of Chemical Engineering, Nanjing University of Science & Technology, Nanjing 210094, People's Republic of China
| | - Nguyen Thanh Tung
- School of Chemical Engineering, Nanjing University of Science & Technology, Nanjing 210094, People's Republic of China
| | - Xiangchao Xu
- School of Chemical Engineering, Nanjing University of Science & Technology, Nanjing 210094, People's Republic of China
| | - Jiazhi Yang
- School of Chemical Engineering, Nanjing University of Science & Technology, Nanjing 210094, People's Republic of China
| | - Feng Li
- School of Chemical Engineering, Nanjing University of Science & Technology, Nanjing 210094, People's Republic of China
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15
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Zheng Y, Qin T, Zi W. Enantioselective Inverse Electron Demand (3 + 2) Cycloaddition of Palladium-Oxyallyl Enabled by a Hydrogen-Bond-Donating Ligand. J Am Chem Soc 2021; 143:1038-1045. [DOI: 10.1021/jacs.0c11504] [Citation(s) in RCA: 41] [Impact Index Per Article: 13.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Affiliation(s)
- Yin Zheng
- State Key Laboratory and Institute of Elemento-Organic Chemistry, College of Chemistry, Nankai University, Tianjin 300071, China
| | - Tianzhu Qin
- State Key Laboratory and Institute of Elemento-Organic Chemistry, College of Chemistry, Nankai University, Tianjin 300071, China
| | - Weiwei Zi
- State Key Laboratory and Institute of Elemento-Organic Chemistry, College of Chemistry, Nankai University, Tianjin 300071, China
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16
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Lee YL, Lee KR, Xuan Z, Lee S. Dual Rh(
II
)/Pd(0) Relay Catalysis for
One‐Pot
Synthesis of
α‐Quaternary
Allylated Indolin‐2‐ones and Benzofuran‐2‐ones. B KOREAN CHEM SOC 2021. [DOI: 10.1002/bkcs.12211] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Affiliation(s)
- Yu Lim Lee
- Department of Chemistry and Nanoscience Ewha Womans University Seoul 03760 Korea
| | - Kyu Ree Lee
- Department of Chemistry and Nanoscience Ewha Womans University Seoul 03760 Korea
| | - Zi Xuan
- Department of Chemistry (BK21) Research Institute of Natural Science, Gyeongsang National University Jinju 52828 Korea
| | - Sang‐gi Lee
- Department of Chemistry and Nanoscience Ewha Womans University Seoul 03760 Korea
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17
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Liu R, Krishnamurthy S, Wu Z, Tummalapalli KSS, Antilla JC. Chiral Calcium Phosphate Catalyzed Enantioselective Amination of 3-Aryl-2-benzofuranones. Org Lett 2020; 22:8101-8105. [PMID: 32969228 DOI: 10.1021/acs.orglett.0c03059] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Abstract
A 4-tert-butyl-phenyl substituted (R)-[H8]-BINOL chiral calcium phosphate catalyzed enantioselective amination of 3-aryl-2-benzofuranones with dibenzyl azodicarboxylate is described. The catalyst loading of the reaction is 1 mol %. This transformation is facile and has a high degree atom economy, which gave products with good yields and high enantioselectivities (79% to 99%). This reaction has excellent ee and a broad substrate scope with mild reaction conditions.
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Affiliation(s)
- Ruihan Liu
- School of Pharmaceutical Sciences and Technology, Tianjin University, Tianjin 300072, P. R. China
| | - Suvratha Krishnamurthy
- School of Pharmaceutical Sciences and Technology, Tianjin University, Tianjin 300072, P. R. China
| | - Zhenwei Wu
- School of Pharmaceutical Sciences and Technology, Tianjin University, Tianjin 300072, P. R. China
| | | | - Jon C Antilla
- School of Pharmaceutical Sciences and Technology, Tianjin University, Tianjin 300072, P. R. China.,School of Sciences, Zhejiang Sci-Tech University, Hangzhou 310018, P. R. China
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18
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Fanourakis A, Docherty PJ, Chuentragool P, Phipps RJ. Recent Developments in Enantioselective Transition Metal Catalysis Featuring Attractive Noncovalent Interactions between Ligand and Substrate. ACS Catal 2020; 10:10672-10714. [PMID: 32983588 PMCID: PMC7507755 DOI: 10.1021/acscatal.0c02957] [Citation(s) in RCA: 96] [Impact Index Per Article: 24.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/07/2020] [Revised: 08/14/2020] [Indexed: 12/11/2022]
Abstract
Enantioselective transition metal catalysis is an area very much at the forefront of contemporary synthetic research. The development of processes that enable the efficient synthesis of enantiopure compounds is of unquestionable importance to chemists working within the many diverse fields of the central science. Traditional approaches to solving this challenge have typically relied on leveraging repulsive steric interactions between chiral ligands and substrates in order to raise the energy of one of the diastereomeric transition states over the other. By contrast, this Review examines an alternative tactic in which a set of attractive noncovalent interactions operating between transition metal ligands and substrates are used to control enantioselectivity. Examples where this creative approach has been successfully applied to render fundamental synthetic processes enantioselective are presented and discussed. In many of the cases examined, the ligand scaffold has been carefully designed to accommodate these attractive interactions, while in others, the importance of the critical interactions was only elucidated in subsequent computational and mechanistic studies. Through an exploration and discussion of recent reports encompassing a wide range of reaction classes, we hope to inspire synthetic chemists to continue to develop asymmetric transformations based on this powerful concept.
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Affiliation(s)
- Alexander Fanourakis
- Department of Chemistry, University of Cambridge, Lensfield Road, Cambridge, CB2 1EW, United Kingdom
| | - Philip J. Docherty
- Department of Chemistry, University of Cambridge, Lensfield Road, Cambridge, CB2 1EW, United Kingdom
| | - Padon Chuentragool
- Department of Chemistry, University of Cambridge, Lensfield Road, Cambridge, CB2 1EW, United Kingdom
| | - Robert J. Phipps
- Department of Chemistry, University of Cambridge, Lensfield Road, Cambridge, CB2 1EW, United Kingdom
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19
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Ohmatsu K, Matsuyama N, Nagato Y, Ooi T. Ion-paired Ligands for Palladium-catalyzed Allylic Alkylation under Base-free Conditions. CHEM LETT 2020. [DOI: 10.1246/cl.200264] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Kohsuke Ohmatsu
- Institute of Transformative Bio-Molecules (WPI-ITbM), and Department of Molecular and Macromolecular Chemistry, Graduate School of Engineering, Nagoya University, Chikusa, Nagoya, Aichi 464-8601, Japan
| | - Naho Matsuyama
- Institute of Transformative Bio-Molecules (WPI-ITbM), and Department of Molecular and Macromolecular Chemistry, Graduate School of Engineering, Nagoya University, Chikusa, Nagoya, Aichi 464-8601, Japan
| | - Yuya Nagato
- Institute of Transformative Bio-Molecules (WPI-ITbM), and Department of Molecular and Macromolecular Chemistry, Graduate School of Engineering, Nagoya University, Chikusa, Nagoya, Aichi 464-8601, Japan
| | - Takashi Ooi
- Institute of Transformative Bio-Molecules (WPI-ITbM), and Department of Molecular and Macromolecular Chemistry, Graduate School of Engineering, Nagoya University, Chikusa, Nagoya, Aichi 464-8601, Japan
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20
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Genov GR, Douthwaite JL, Lahdenperä ASK, Gibson DC, Phipps RJ. Enantioselective remote C-H activation directed by a chiral cation. Science 2020; 367:1246-1251. [PMID: 32165586 DOI: 10.1126/science.aba1120] [Citation(s) in RCA: 148] [Impact Index Per Article: 37.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/08/2019] [Accepted: 02/19/2020] [Indexed: 12/24/2022]
Abstract
Chiral cations have been used extensively as organocatalysts, but their application to rendering transition metal-catalyzed processes enantioselective remains rare. This is despite the success of the analogous charge-inverted strategy in which cationic metal complexes are paired with chiral anions. We report here a strategy to render a common bipyridine ligand anionic and pair its iridium complexes with a chiral cation derived from quinine. We have applied these ion-paired complexes to long-range asymmetric induction in the desymmetrization of the geminal diaryl motif, located on a carbon or phosphorus center, by enantioselective C-H borylation. In principle, numerous common classes of ligand could likewise be amenable to this approach.
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Affiliation(s)
- Georgi R Genov
- Department of Chemistry, University of Cambridge, Lensfield Road, Cambridge, CB2 1EW, UK
| | - James L Douthwaite
- Department of Chemistry, University of Cambridge, Lensfield Road, Cambridge, CB2 1EW, UK
| | - Antti S K Lahdenperä
- Department of Chemistry, University of Cambridge, Lensfield Road, Cambridge, CB2 1EW, UK
| | - David C Gibson
- Department of Chemistry, University of Cambridge, Lensfield Road, Cambridge, CB2 1EW, UK
| | - Robert J Phipps
- Department of Chemistry, University of Cambridge, Lensfield Road, Cambridge, CB2 1EW, UK.
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21
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Tran VT, Nimmagadda SK, Liu M, Engle KM. Recent applications of chiral phosphoric acids in palladium catalysis. Org Biomol Chem 2020; 18:618-637. [PMID: 31907504 DOI: 10.1039/c9ob02205h] [Citation(s) in RCA: 26] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Through the combined action of palladium catalysts and chiral phosphoric acids (CPAs) a variety of catalytic asymmetric reactions have been realized during the past decade, including allylation, alkene functionalization, and C-H activation. This review surveys key examples across these various reaction types and examines the different mechanisms by which CPAs can affect stereoinduction in these reaction systems.
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Affiliation(s)
- Van T Tran
- Department of Chemistry, The Scripps Research Institute, 10550 N. Torrey Pines Road, BCC-169, La Jolla, CA 92037, USA.
| | - Sri Krishna Nimmagadda
- Department of Chemistry, The Scripps Research Institute, 10550 N. Torrey Pines Road, BCC-169, La Jolla, CA 92037, USA.
| | - Mingyu Liu
- Department of Chemistry, The Scripps Research Institute, 10550 N. Torrey Pines Road, BCC-169, La Jolla, CA 92037, USA.
| | - Keary M Engle
- Department of Chemistry, The Scripps Research Institute, 10550 N. Torrey Pines Road, BCC-169, La Jolla, CA 92037, USA.
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22
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Ohmatsu K, Ooi T. Cationic Organic Catalysts or Ligands in Concert with Metal Catalysts. Top Curr Chem (Cham) 2019; 377:31. [DOI: 10.1007/s41061-019-0256-1] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/16/2019] [Accepted: 10/09/2019] [Indexed: 11/25/2022]
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23
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Tang X, He H, Fang X, Chang Z, Antilla JC. Design and synthesis of new alkyl-based chiral phosphoric acid catalysts. Chirality 2019; 31:592-602. [PMID: 31197898 DOI: 10.1002/chir.23101] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/05/2019] [Revised: 04/25/2019] [Accepted: 05/04/2019] [Indexed: 11/06/2022]
Abstract
Using chiral BINOL-derived phosphoric acids (PA's) to activate substrates for enhanced reactivity is now regarded as a powerful strategy to control enantioselectivity in asymmetric synthesis. Generally, most substituents at the 3,3'-positions of BINOL PA's are aryl derivatives. These derivatives are pivotal in attaining high selectivity. PA's with alkyl substituents in these positions have rarely been reported. Herein, we introduced alkyl-based substituents at the 3,3'-position of PA's. These new potential catalysts, if applied in reactions, may allow altered noncovalent interactions (as opposed to the typical aryl substituents in these positions) with substrates used in chiral PA-catalyzed chemistry in the future.
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Affiliation(s)
- Xiaoxue Tang
- Institute for Molecular Design and Synthesis, School of Pharmaceutical Science and Technology, Health Science Platform, Tianjin University, Tianjin, China
| | - Hualing He
- Institute for Molecular Design and Synthesis, School of Pharmaceutical Science and Technology, Health Science Platform, Tianjin University, Tianjin, China
| | - Xiantao Fang
- Institute for Molecular Design and Synthesis, School of Pharmaceutical Science and Technology, Health Science Platform, Tianjin University, Tianjin, China
| | - Zexu Chang
- Institute for Molecular Design and Synthesis, School of Pharmaceutical Science and Technology, Health Science Platform, Tianjin University, Tianjin, China
| | - Jon C Antilla
- Institute for Molecular Design and Synthesis, School of Pharmaceutical Science and Technology, Health Science Platform, Tianjin University, Tianjin, China
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24
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Ran G, Yang X, Yue J, Du W, Chen Y. Asymmetric Allylic Alkylation with Deconjugated Carbonyl Compounds: Direct Vinylogous Umpolung Strategy. Angew Chem Int Ed Engl 2019. [DOI: 10.1002/ange.201903478] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Guang‐Yao Ran
- Key Laboratory of Drug-Targeting and Drug Delivery System of the Ministry of Education and Sichuan Research Center for Drug Precision Industrial TechnologyWest China School of PharmacySichuan University Chengdu 610041 China
| | - Xing‐Xing Yang
- Key Laboratory of Drug-Targeting and Drug Delivery System of the Ministry of Education and Sichuan Research Center for Drug Precision Industrial TechnologyWest China School of PharmacySichuan University Chengdu 610041 China
| | - Jing‐Fei Yue
- Key Laboratory of Drug-Targeting and Drug Delivery System of the Ministry of Education and Sichuan Research Center for Drug Precision Industrial TechnologyWest China School of PharmacySichuan University Chengdu 610041 China
| | - Wei Du
- Key Laboratory of Drug-Targeting and Drug Delivery System of the Ministry of Education and Sichuan Research Center for Drug Precision Industrial TechnologyWest China School of PharmacySichuan University Chengdu 610041 China
| | - Ying‐Chun Chen
- Key Laboratory of Drug-Targeting and Drug Delivery System of the Ministry of Education and Sichuan Research Center for Drug Precision Industrial TechnologyWest China School of PharmacySichuan University Chengdu 610041 China
- College of PharmacyThird Military Medical University Chongqing 400038 China
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25
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Ran G, Yang X, Yue J, Du W, Chen Y. Asymmetric Allylic Alkylation with Deconjugated Carbonyl Compounds: Direct Vinylogous Umpolung Strategy. Angew Chem Int Ed Engl 2019; 58:9210-9214. [DOI: 10.1002/anie.201903478] [Citation(s) in RCA: 33] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/21/2019] [Revised: 04/18/2019] [Indexed: 02/02/2023]
Affiliation(s)
- Guang‐Yao Ran
- Key Laboratory of Drug-Targeting and Drug Delivery System of the Ministry of Education and Sichuan Research Center for Drug Precision Industrial TechnologyWest China School of PharmacySichuan University Chengdu 610041 China
| | - Xing‐Xing Yang
- Key Laboratory of Drug-Targeting and Drug Delivery System of the Ministry of Education and Sichuan Research Center for Drug Precision Industrial TechnologyWest China School of PharmacySichuan University Chengdu 610041 China
| | - Jing‐Fei Yue
- Key Laboratory of Drug-Targeting and Drug Delivery System of the Ministry of Education and Sichuan Research Center for Drug Precision Industrial TechnologyWest China School of PharmacySichuan University Chengdu 610041 China
| | - Wei Du
- Key Laboratory of Drug-Targeting and Drug Delivery System of the Ministry of Education and Sichuan Research Center for Drug Precision Industrial TechnologyWest China School of PharmacySichuan University Chengdu 610041 China
| | - Ying‐Chun Chen
- Key Laboratory of Drug-Targeting and Drug Delivery System of the Ministry of Education and Sichuan Research Center for Drug Precision Industrial TechnologyWest China School of PharmacySichuan University Chengdu 610041 China
- College of PharmacyThird Military Medical University Chongqing 400038 China
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26
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Xu B, Tambar UK. Remote Allylation of Unactivated C(sp 3)-H Bonds Triggered by Photogenerated Amidyl Radicals. ACS Catal 2019; 9:4627-4631. [PMID: 34109055 DOI: 10.1021/acscatal.9b00563] [Citation(s) in RCA: 38] [Impact Index Per Article: 7.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
The allylation reaction is a highly versatile transformation in chemical synthesis. While many elegant direct C(sp2)-H allylation reactions have been developed, the direct allylation of unactivated C(sp3)-H bonds is underdeveloped. By applying photoredox catalysis and a [1,5]-HAT process, herein we report a direct allylation of unactivated C(sp3)‒H bonds. This photocatalyzed transformation is tolerant of several functional groups in the amide and allylic chloride substrates. Various allyl-substituted amide products were obtained with good yields and high δ-selectivity.
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Affiliation(s)
- Bin Xu
- Department of Biochemistry, The University of Texas Southwestern Medical Center, 5323 Harry Hines Boulevard, Dallas, Texas 75390-9038, United States
| | - Uttam K. Tambar
- Department of Biochemistry, The University of Texas Southwestern Medical Center, 5323 Harry Hines Boulevard, Dallas, Texas 75390-9038, United States
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27
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Qian D, Sun J. Recent Progress in Asymmetric Ion‐Pairing Catalysis with Ammonium Salts. Chemistry 2019; 25:3740-3751. [DOI: 10.1002/chem.201803752] [Citation(s) in RCA: 48] [Impact Index Per Article: 9.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/22/2018] [Indexed: 12/29/2022]
Affiliation(s)
- Deyun Qian
- Department of ChemistryThe Hong Kong University of Science and Technology Clear Water Bay Kowloon, Hong Kong P. R. China
| | - Jianwei Sun
- Department of ChemistryThe Hong Kong University of Science and Technology Clear Water Bay Kowloon, Hong Kong P. R. China
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28
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Du T, Li Z, Zheng C, Fang G, Yu L, Liu J, Zhao G. Highly enantioselective 1,3-dipolar cycloaddition of imino esters with benzofuranone derivatives catalyzed by thiourea−quaternary ammonium salt. Tetrahedron 2018. [DOI: 10.1016/j.tet.2018.11.025] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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29
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He ZT, Hartwig JF. Enantioselective α-functionalizations of ketones via allylic substitution of silyl enol ethers. Nat Chem 2018; 11:177-183. [PMID: 30455430 PMCID: PMC6347495 DOI: 10.1038/s41557-018-0165-x] [Citation(s) in RCA: 27] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/11/2018] [Accepted: 10/01/2018] [Indexed: 11/25/2022]
Abstract
The enantioselective construction of carbon–heteroatom and carbon–carbon bonds alpha to ketones forms substructures that are ubiquitous in natural products, pharmaceuticals and agrochemicals. Traditional methods to form such bonds have relied on combining ketone enolates with electrophiles. Reactions with heteroatom-based electrophiles require special reagents in which the heteroatom, which is typically nucleophilic, has been rendered electrophilic by changes to the oxidation state. The resulting products usually require post-synthetic transformations to unveil the functional group in the final desired products. Moreover, different catalytic systems are typically required for the reaction of different electrophiles. Here, we report a strategy for the formal enantioselective α-functionalization of ketones to form products containing a diverse array of substituents at the alpha position with a single catalyst. This strategy involves an unusual reversal of the role of the nucleophile and electrophile to form C–N, C–O, C–S, and C–C bonds from a series of masked ketone electrophiles and a wide range of conventional heteroatom and carbon nucleophiles catalyzed by a metallacyclic iridium catalyst.
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Affiliation(s)
- Zhi-Tao He
- Department of Chemistry, University of California, Berkeley, CA, USA
| | - John F Hartwig
- Department of Chemistry, University of California, Berkeley, CA, USA.
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30
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Zhu D, Lv L, Li CC, Ung S, Gao J, Li CJ. Umpolung of Carbonyl Groups as Alkyl Organometallic Reagent Surrogates for Palladium-Catalyzed Allylic Alkylation. Angew Chem Int Ed Engl 2018; 57:16520-16524. [DOI: 10.1002/anie.201809112] [Citation(s) in RCA: 42] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/07/2018] [Revised: 10/17/2018] [Indexed: 01/06/2023]
Affiliation(s)
- Dianhu Zhu
- Department of Chemistry and FRQNT Center for, Green Chemistry and Catalysis; McGill University; Montreal QC H3A 0B8 Canada
| | - Leiyang Lv
- Department of Chemistry and FRQNT Center for, Green Chemistry and Catalysis; McGill University; Montreal QC H3A 0B8 Canada
| | - Chen-Chen Li
- Department of Chemistry and FRQNT Center for, Green Chemistry and Catalysis; McGill University; Montreal QC H3A 0B8 Canada
| | - Sosthene Ung
- Department of Chemistry and FRQNT Center for, Green Chemistry and Catalysis; McGill University; Montreal QC H3A 0B8 Canada
| | - Jian Gao
- Department of Chemistry and FRQNT Center for, Green Chemistry and Catalysis; McGill University; Montreal QC H3A 0B8 Canada
| | - Chao-Jun Li
- Department of Chemistry and FRQNT Center for, Green Chemistry and Catalysis; McGill University; Montreal QC H3A 0B8 Canada
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31
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Zhu D, Lv L, Li CC, Ung S, Gao J, Li CJ. Umpolung of Carbonyl Groups as Alkyl Organometallic Reagent Surrogates for Palladium-Catalyzed Allylic Alkylation. Angew Chem Int Ed Engl 2018. [DOI: 10.1002/ange.201809112] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Affiliation(s)
- Dianhu Zhu
- Department of Chemistry and FRQNT Center for, Green Chemistry and Catalysis; McGill University; Montreal QC H3A 0B8 Canada
| | - Leiyang Lv
- Department of Chemistry and FRQNT Center for, Green Chemistry and Catalysis; McGill University; Montreal QC H3A 0B8 Canada
| | - Chen-Chen Li
- Department of Chemistry and FRQNT Center for, Green Chemistry and Catalysis; McGill University; Montreal QC H3A 0B8 Canada
| | - Sosthene Ung
- Department of Chemistry and FRQNT Center for, Green Chemistry and Catalysis; McGill University; Montreal QC H3A 0B8 Canada
| | - Jian Gao
- Department of Chemistry and FRQNT Center for, Green Chemistry and Catalysis; McGill University; Montreal QC H3A 0B8 Canada
| | - Chao-Jun Li
- Department of Chemistry and FRQNT Center for, Green Chemistry and Catalysis; McGill University; Montreal QC H3A 0B8 Canada
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32
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Pan JL, Xie P, Chen C, Hao Y, Liu C, Bai HY, Ding J, Wang LR, Xia Y, Zhang SY. Rhodium(III)-Catalyzed Redox-Neutral Cascade [3 + 2] Annulation of N-Phenoxyacetamides with Propiolates via C–H Functionalization/Isomerization/Lactonization. Org Lett 2018; 20:7131-7136. [DOI: 10.1021/acs.orglett.8b03082] [Citation(s) in RCA: 39] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
| | - Peipei Xie
- College of Chemistry and Materials Engineering, Wenzhou University, Wenzhou 325035, P. R. China
| | | | | | | | | | | | | | - Yuanzhi Xia
- College of Chemistry and Materials Engineering, Wenzhou University, Wenzhou 325035, P. R. China
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33
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Hutchings-Goetz L, Yang C, Snaddon TN. Enantioselective α-Allylation of Aryl Acetic Acid Esters via C1-Ammonium Enolate Nucleophiles: Identification of a Broadly Effective Palladium Catalyst for Electron-Deficient Electrophiles. ACS Catal 2018; 8:10537-10544. [PMID: 31105986 DOI: 10.1021/acscatal.8b03507] [Citation(s) in RCA: 48] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
We have identified a generally effective Pd catalyst for the highly enantioselective cooperative Lewis base/Pd-catalyzed α-allylation of aryl acetic esters using electron-deficient electrophiles. Changing between aldehyde, ketone, ester, and amide substituents at the terminus of intermediate cationic π-(allyl)Pd species affects both the efficiency of the reaction and, in the case of amides, control over the stereochemistry of the product alkene, as a function of the ligand. Tris[tri(2-thienyl)phosphino]Pd(0) serves as a broadly effective catalyst and overcomes these challenges to provide a general, high-yielding, and operationally simple C(sp3)-C(sp3) bond-forming method that gives products with high levels of enantioselectivity.
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Affiliation(s)
- Luke Hutchings-Goetz
- Department of Chemistry, Indiana University, 800 E. Kirkwood Ave., Bloomington, Indiana 47405, United States
| | - Chao Yang
- Department of Chemistry, Indiana University, 800 E. Kirkwood Ave., Bloomington, Indiana 47405, United States
| | - Thomas. N. Snaddon
- Department of Chemistry, Indiana University, 800 E. Kirkwood Ave., Bloomington, Indiana 47405, United States
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34
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Dhotare BB, Kumar M, Nayak SK. Catalytic Oxidation of 3-Arylbenzofuran-2(3H)-ones with PCC-H5IO6: Syntheses of 3-Aryl-3-hydroxy/3-amido-3-arylbenzofuran-2(3H)-ones. J Org Chem 2018; 83:10089-10096. [DOI: 10.1021/acs.joc.8b01395] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
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35
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Ohta H, Xue Q, Hayashi M. Pd-Catalyzed P-C Cross-Coupling of Aryl Bromides and Triflates with Hydroxymethylphosphine Sulfide Derivatives. European J Org Chem 2018. [DOI: 10.1002/ejoc.201701706] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Affiliation(s)
- Hidetoshi Ohta
- Department of Materials Science and Biotechnology; Graduate School of Science and Engineering; Ehime University; 3 Bunkyo-cho 790-8577 Matsuyama Japan
| | - Qian Xue
- Department of Materials Science and Biotechnology; Graduate School of Science and Engineering; Ehime University; 3 Bunkyo-cho 790-8577 Matsuyama Japan
| | - Minoru Hayashi
- Department of Materials Science and Biotechnology; Graduate School of Science and Engineering; Ehime University; 3 Bunkyo-cho 790-8577 Matsuyama Japan
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36
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Chang S, Wang L, Lin X. Synthesis and application of a new hexamethyl-1,1′-spirobiindane-based chiral bisphosphine (HMSI-PHOS) ligand in asymmetric allylic alkylation. Org Biomol Chem 2018. [DOI: 10.1039/c8ob00279g] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A new class of hexamethyl-1,1′-spirobiindane-based chiral bisphosphine ligand was synthesized and used in Pd-catalyzed asymmetric allylic alkylation reactions.
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Affiliation(s)
- Shirui Chang
- Laboratory of Asymmetric Catalysis and Synthesis
- Department of Chemistry
- Zhejiang University
- Hangzhou 310027
- China
| | - Lei Wang
- Laboratory of Asymmetric Catalysis and Synthesis
- Department of Chemistry
- Zhejiang University
- Hangzhou 310027
- China
| | - Xufeng Lin
- Laboratory of Asymmetric Catalysis and Synthesis
- Department of Chemistry
- Zhejiang University
- Hangzhou 310027
- China
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37
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Aebly AH, Rainey TJ. Pd(II)-catalyzed enantioselective intramolecular oxidative amination utilizing (+)-camphorsulfonic acid. Tetrahedron Lett 2017. [DOI: 10.1016/j.tetlet.2017.07.090] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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38
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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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39
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Li S, Zhang E, Feng J, Li X. An enantioselective conjugate addition reaction of 3-substituted benzothiophen-2-ones and 2-phthalimidoacrylates. Org Chem Front 2017. [DOI: 10.1039/c7qo00531h] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Abstract
A highly enantioselective conjugate addition reaction of 3-substituted benzothiophen-2-ones to 2-phthalimidoacrylates has been developed using a bifunctional tertiary-amine thiourea catalyst.
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Affiliation(s)
- Shoulei Li
- State Key Laboratory of Elemento-organic Chemistry
- College of Chemistry
- Collaborative Innovation Center of Chemical Science and Engineering
- Nankai University
- Tianjin 300071
| | - Enge Zhang
- State Key Laboratory of Elemento-organic Chemistry
- College of Chemistry
- Collaborative Innovation Center of Chemical Science and Engineering
- Nankai University
- Tianjin 300071
| | - Junjun Feng
- State Key Laboratory of Elemento-organic Chemistry
- College of Chemistry
- Collaborative Innovation Center of Chemical Science and Engineering
- Nankai University
- Tianjin 300071
| | - Xin Li
- State Key Laboratory of Elemento-organic Chemistry
- College of Chemistry
- Collaborative Innovation Center of Chemical Science and Engineering
- Nankai University
- Tianjin 300071
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40
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Abstract
In α-cationic phosphines, at least one of the three substituents on phosphorus corresponds to a cationic (normally, but not always heteroaromatic) group, which is attached without any spacer to the phosphorus atom by a relatively inert P-C bond. This unique architecture confers to the resulting ligand strong acceptor properties, which frequently surpass those of traditional acceptor ligands such as phosphites or polyfluorinated phosphines. In addition, the fine-tuning of the stereoelectronic properties of α-cationic phosphines is also possible by judicious selection of the number and nature of the cationic groups. The opportunities offered in catalysis by α-cationic ligands arise from this ability to deplete electron density from the metals they coordinate. Thus, if in a hypothetical catalytic cycle the step that determines the rate is facilitated by an increase of the Lewis acidity at the metal center, then an acceleration of the whole process is expected by their use as ancillary ligands. Interestingly, this situation is found more frequently than one might think; many common elementary steps involved in catalytic cycles, such as reductive eliminations, coordination of substrates to metals, or attack of nucleophiles to coordinated substrates, belong to this category and are often fostered by electron poor metal centers. In this regard, our group has observed remarkable ligand acceleration effects by the employment of α-cationic phosphines in Au(I)- and Pt(II)-promoted hydroarylation and cycloisomerization reactions. These results seem to be general in π-acid catalysis when the nucleophile used is not especially electron rich because then their attack to the activated alkene or alkyne is normally rate determining. On the other hand, the use of cationic phosphines also presents drawbacks that limit their range of application. As a general rule, the reduced σ-donation from the phosphine is not compensated by the increased π-back-donation from the metal making the resulting phosphorus-metal bond weaker, and the corresponding catalysts more prone to decomposition. This can be critical when di- or tricationic ancillary ligands are used. In addition, the positively charged groups occasionally participate in undesired side reactions, with either the metal or the substrate, which are not present when their neutral congeners are used. Stimulated by both the fundamental questions regarding bonding and their valuable applications in catalysis, the chemistry of α-cationic phosphines has experienced an enormous growth during the last years. This Account describes our group's efforts and those of others to understand their coordination behavior, study their reactivity, and further develop their range of applications in catalysis.
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Affiliation(s)
- Manuel Alcarazo
- Institut für Organische
und Biomolekulare Chemie, Georg-August-Universität Göttingen, Tammannstraße
2, 37077 Göttingen, Germany
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41
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1,3-Dipolar Cycloaddition of Benzofuranone Derivatives and Azomethine Ylides Promoted by Simple Functional Ionic Liquids: Direct Access to Highly Substituted Pyrrolidine and Spirocyclic Benzofuranone. ChemistrySelect 2016. [DOI: 10.1002/slct.201600951] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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42
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Dhotare BB, Choudhary MK, Nayak SK. SbCl3-catalyzed solvent-free Friedel–Crafts reaction of phenols with mandelic acids to 3-aryl benzofuran-2(3H)-ones: Synthesis of spirocyclic 2,3-dihydrobenzofuran-2-ones. SYNTHETIC COMMUN 2016. [DOI: 10.1080/00397911.2016.1226341] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
Affiliation(s)
- Bhaskar B. Dhotare
- Bio-organic Division, Bhabha Atomic Research Centre, Trombay, Mumbai, India
| | - Manoj K. Choudhary
- Bio-organic Division, Bhabha Atomic Research Centre, Trombay, Mumbai, India
| | - Sandip K. Nayak
- Bio-organic Division, Bhabha Atomic Research Centre, Trombay, Mumbai, India
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43
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Kisan HK, Sunoj RB. Asymmetric Cooperative Catalysis in a Three-Component Reaction: Mechanism and Origin of Enantio- and Diastereoselectivities. Org Lett 2016; 18:3746-9. [PMID: 27447290 DOI: 10.1021/acs.orglett.6b01765] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Mechanistic insights gained through density functional theory (DFT M06 and B3LYP) computations on a three-component cooperative asymmetric catalytic reaction between a diazo ester, a carbamate, and an imine, catalyzed by dirhodium acetate and chiral phosphoric acid (Brønsted acid), are presented. The addition of the dirhodium-bound enol to the imine yielding an α,β-diamino ester is energetically more preferred over a potentially competitive protonation of the same enol leading to an α-amino ester.
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Affiliation(s)
- Hemanta K Kisan
- Department of Chemistry, Indian Institute of Technology Bombay , Powai, Mumbai 400076, India
| | - Raghavan B Sunoj
- Department of Chemistry, Indian Institute of Technology Bombay , Powai, Mumbai 400076, India
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44
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Pignataro L, Gennari C. Riding the Wave of Monodentate Ligand Revival: From the A/B Concept to Noncovalent Interactions. CHEM REC 2016; 16:2544-2560. [PMID: 27424817 DOI: 10.1002/tcr.201600087] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/28/2016] [Indexed: 12/19/2022]
Abstract
The rediscovery of chiral monodentate ligands made in the period 1999-2003 had important consequences in enantioselective transition-metal catalysis, such as the introduction of the A/B concept (i.e., use of monodentate ligand mixtures) and, later, a renewed interest in supramolecular ligands capable of ligand-ligand and ligand-substrate interactions. This Personal Account summarizes the contributions made by our research group in this area in the period 2004-2015, which reflect the abovementioned developments. Within this area, we introduced some original concepts, such as 1) the use of chiral tropos ligand mixtures; 2) the development of new strategies to maximize heterocomplex formation from combinations of simple monodentate ligands; 3) the investigation of new ligand-ligand interactions to achieve selective heterocomplex formation; and 4) the development of highly efficient and synthetically accessible supramolecular ligands.
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Affiliation(s)
- Luca Pignataro
- Università degli Studi di Milano, Dipartimento di Chimica, Via C. Golgi, 19, I-20133, Milan, Italy
| | - Cesare Gennari
- Università degli Studi di Milano, Dipartimento di Chimica, Via C. Golgi, 19, I-20133, Milan, Italy
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45
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Imagawa N, Nagato Y, Ohmatsu K, Ooi T. Multiple Absolute Stereocontrol in Pd-Catalyzed [3+2] Cycloaddition of Oxazolidinones and Trisubstituted Alkenes Using Chiral Ammonium–Phosphine Hybrid Ligands. BULLETIN OF THE CHEMICAL SOCIETY OF JAPAN 2016. [DOI: 10.1246/bcsj.20160053] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Naomichi Imagawa
- Institute of Transformative Bio-Molecules (WPI-ITbM), and Graduate School of Engineering, Nagoya University
| | - Yuya Nagato
- Institute of Transformative Bio-Molecules (WPI-ITbM), and Graduate School of Engineering, Nagoya University
| | - Kohsuke Ohmatsu
- Institute of Transformative Bio-Molecules (WPI-ITbM), and Graduate School of Engineering, Nagoya University
| | - Takashi Ooi
- Institute of Transformative Bio-Molecules (WPI-ITbM), and Graduate School of Engineering, Nagoya University
- CREST, Japan Science and Technology Agency (JST)
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46
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Barbazanges M, Caytan E, Lesage D, Aubert C, Fensterbank L, Gandon V, Ollivier C. Chiral Phosphate in Rhodium-Catalyzed Asymmetric [2+2+2] Cycloaddition: Ligand, Counterion, or Both? Chemistry 2016; 22:8553-8. [PMID: 27167983 DOI: 10.1002/chem.201601188] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/12/2016] [Indexed: 11/08/2022]
Abstract
Investigations based on NMR spectroscopy, mass spectrometry, and DFT calculations shed light on the metallic species generated in the rhodium-catalyzed asymmetric [2+2+2] cycloaddition reaction between diynes and isocyanates with the chiral phosphate TRIP. The catalytic mixture comprising [{Rh(cod)Cl}2 ], 1,4-diphenylphosphinobutane (dppb), and Ag(S)-TRIP actually gives rise to two species, both having an effect on the stereoselectivity. One is a rhodium(I) complex in which TRIP is a weakly coordinating counterion, whereas the other is a bimetallic Rh/Ag complex in which TRIP is a strongly coordinating X-type ligand.
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Affiliation(s)
- Marion Barbazanges
- Sorbonne Universités, UPMC Univ. Paris 06, Institut Parisien de Chimie Moléculaire (UMR CNRS 8232), Case Courrier 229, 4 place Jussieu, 75252, Paris Cedex 05, France.
| | - Elsa Caytan
- Institut des Sciences Chimiques de Rennes, Université de Rennes 1, Campus de Beaulieu, 35042, Rennes Cedex, France
| | - Denis Lesage
- Sorbonne Universités, UPMC Univ. Paris 06, Institut Parisien de Chimie Moléculaire (UMR CNRS 8232), Case Courrier 229, 4 place Jussieu, 75252, Paris Cedex 05, France
| | - Corinne Aubert
- Sorbonne Universités, UPMC Univ. Paris 06, Institut Parisien de Chimie Moléculaire (UMR CNRS 8232), Case Courrier 229, 4 place Jussieu, 75252, Paris Cedex 05, France.
| | - Louis Fensterbank
- Sorbonne Universités, UPMC Univ. Paris 06, Institut Parisien de Chimie Moléculaire (UMR CNRS 8232), Case Courrier 229, 4 place Jussieu, 75252, Paris Cedex 05, France.
| | - Vincent Gandon
- ICMMO, Univ. Paris-Sud, CNRS UMR 8182, Université Paris-Saclay, 91405, Orsay cedex, France.,ICSN, CNRS UPR 2301, Univ. Paris-Sud, Université Paris-Saclay, 91198, Gif-sur-Yvette, France
| | - Cyril Ollivier
- Sorbonne Universités, UPMC Univ. Paris 06, Institut Parisien de Chimie Moléculaire (UMR CNRS 8232), Case Courrier 229, 4 place Jussieu, 75252, Paris Cedex 05, France
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47
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Hara Y, Kusano Y, Ohmatsu K, Ooi T. Palladium-catalyzed Branch-selective Decarboxylative Allylation Using Ion-paired Ligands. CHEM LETT 2016. [DOI: 10.1246/cl.160158] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Yoshiyuki Hara
- Institute of Transformative Bio-Molecules (WPI-ITbM), and Department of Applied Chemistry, Graduate School of Engineering, Nagoya University
| | - Yuya Kusano
- Institute of Transformative Bio-Molecules (WPI-ITbM), and Department of Applied Chemistry, Graduate School of Engineering, Nagoya University
| | - Kohsuke Ohmatsu
- Institute of Transformative Bio-Molecules (WPI-ITbM), and Department of Applied Chemistry, Graduate School of Engineering, Nagoya University
| | - Takashi Ooi
- Institute of Transformative Bio-Molecules (WPI-ITbM), and Department of Applied Chemistry, Graduate School of Engineering, Nagoya University
- CREST, Japan Science and Technology Agency (JST)
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48
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Yang C, Zhang EG, Li X, Cheng JP. Asymmetric Conjugate Addition of Benzofuran-2-ones to Alkyl 2-Phthalimidoacrylates: Modeling Structure-Stereoselectivity Relationships with Steric and Electronic Parameters. Angew Chem Int Ed Engl 2016; 55:6506-10. [DOI: 10.1002/anie.201601028] [Citation(s) in RCA: 40] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/29/2016] [Revised: 02/29/2016] [Indexed: 11/08/2022]
Affiliation(s)
- Chen Yang
- State Key Laboratory of Elemento-organic Chemistry, Department of Chemistry; Nankai University, and Collaborative Innovation Center of Chemical Science and Engineering; Tianjin 300071 China
| | - En-Ge Zhang
- State Key Laboratory of Elemento-organic Chemistry, Department of Chemistry; Nankai University, and Collaborative Innovation Center of Chemical Science and Engineering; Tianjin 300071 China
| | - Xin Li
- State Key Laboratory of Elemento-organic Chemistry, Department of Chemistry; Nankai University, and Collaborative Innovation Center of Chemical Science and Engineering; Tianjin 300071 China
| | - Jin-Pei Cheng
- State Key Laboratory of Elemento-organic Chemistry, Department of Chemistry; Nankai University, and Collaborative Innovation Center of Chemical Science and Engineering; Tianjin 300071 China
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49
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Yang C, Zhang EG, Li X, Cheng JP. Asymmetric Conjugate Addition of Benzofuran-2-ones to Alkyl 2-Phthalimidoacrylates: Modeling Structure-Stereoselectivity Relationships with Steric and Electronic Parameters. Angew Chem Int Ed Engl 2016. [DOI: 10.1002/ange.201601028] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Affiliation(s)
- Chen Yang
- State Key Laboratory of Elemento-organic Chemistry, Department of Chemistry; Nankai University, and Collaborative Innovation Center of Chemical Science and Engineering; Tianjin 300071 China
| | - En-Ge Zhang
- State Key Laboratory of Elemento-organic Chemistry, Department of Chemistry; Nankai University, and Collaborative Innovation Center of Chemical Science and Engineering; Tianjin 300071 China
| | - Xin Li
- State Key Laboratory of Elemento-organic Chemistry, Department of Chemistry; Nankai University, and Collaborative Innovation Center of Chemical Science and Engineering; Tianjin 300071 China
| | - Jin-Pei Cheng
- State Key Laboratory of Elemento-organic Chemistry, Department of Chemistry; Nankai University, and Collaborative Innovation Center of Chemical Science and Engineering; Tianjin 300071 China
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50
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Desmarchelier A, Caumes X, Raynal M, Vidal-Ferran A, van Leeuwen PWNM, Bouteiller L. Correlation between the Selectivity and the Structure of an Asymmetric Catalyst Built on a Chirally Amplified Supramolecular Helical Scaffold. J Am Chem Soc 2016; 138:4908-16. [PMID: 26998637 DOI: 10.1021/jacs.6b01306] [Citation(s) in RCA: 79] [Impact Index Per Article: 9.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
For the first time, supramolecular helical rods composed of an achiral metal complex and a complementary enantiopure monomer provided a good level of enantioinduction in asymmetric catalysis. Mixtures containing an achiral ligand monomer (BTA(PPh2), 2 mol %) and an enantiopure ligand-free comonomer (ester BTA, 2.5 mol %), both possessing a complementary benzene-1,3,5-tricarboxamide (BTA) central unit, were investigated in combination with [Rh(cod)2]BArF (1 mol %) in the asymmetric hydrogenation of dimethyl itaconate. Notably, efficient chirality transfer occurs within the hydrogen-bonded coassemblies formed by BTA Ile and the intrinsically achiral catalytic rhodium catalyst, providing the hydrogenation product with up to 85% ee. The effect of the relative content of BTA Ile as compared to the ligand was investigated. The amount of chiral comonomer can be decreased down to one-fourth of that of the ligand without deteriorating the enantioselectivity of the reaction, while the enantioselectivity decreases for mixtures containing high amounts of BTA Ile. The nonlinear relationship between the amount of chiral comonomer and the enantioselectivity indicates that chirality amplification effects are at work in this catalytic system. Also, right-handed helical rods are formed upon co-assembly of the achiral rhodium complex of BTA(PPh2) and the enantiopure comonomer BTA Ile as confirmed by various spectroscopic and scattering techniques. Remarkably, the major enantiomer and the selectivity of the catalytic reaction are related to the handedness and the net helicity of the coassemblies, respectively. Further development of this class of catalysts built on chirally amplified helical scaffolds should contribute to the design of asymmetric catalysts operating with low amounts of chiral entities.
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Affiliation(s)
- Alaric Desmarchelier
- Sorbonne Universités, UPMC Univ Paris 06, CNRS, Institut Parisien de Chimie Moléculaire, Equipe Chimie des Polymères , 4 Place Jussieu, F-75005 Paris, France
| | - Xavier Caumes
- Sorbonne Universités, UPMC Univ Paris 06, CNRS, Institut Parisien de Chimie Moléculaire, Equipe Chimie des Polymères , 4 Place Jussieu, F-75005 Paris, France
| | - Matthieu Raynal
- Sorbonne Universités, UPMC Univ Paris 06, CNRS, Institut Parisien de Chimie Moléculaire, Equipe Chimie des Polymères , 4 Place Jussieu, F-75005 Paris, France
| | - Anton Vidal-Ferran
- Institute of Chemical Research of Catalonia (ICIQ) , Avgda. Països Catalans 16, 43007 Tarragona, Spain.,Catalan Institution for Research and Advanced Studies (ICREA) , Passeig Lluís Companys 23, 08010 Barcelona, Spain
| | | | - Laurent Bouteiller
- Sorbonne Universités, UPMC Univ Paris 06, CNRS, Institut Parisien de Chimie Moléculaire, Equipe Chimie des Polymères , 4 Place Jussieu, F-75005 Paris, France
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