1
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Kaster SHM, Zhu L, Lyon WL, Ma R, Ammann SE, White MC. Palladium-catalyzed cross-coupling of alcohols with olefins by positional tuning of a counteranion. Science 2024; 385:1067-1076. [PMID: 39236162 DOI: 10.1126/science.ado8027] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/21/2024] [Revised: 05/31/2024] [Accepted: 07/31/2024] [Indexed: 09/07/2024]
Abstract
Transition metal-catalyzed cross-couplings have great potential to furnish complex ethers; however, challenges in the C(sp3)-O functionalization step have precluded general methods. Here, we describe computationally guided transition metal-ligand design that positions a hydrogen-bond acceptor anion at the reactive site to promote functionalization. A general cross-coupling of primary, secondary, and tertiary aliphatic alcohols with terminal olefins to furnish >130 ethers is achieved. The mild conditions tolerate functionality that is prone to substitution, elimination, and epimerization and achieve site selectivity in polyol settings. Mechanistic studies support the hypothesis that the ligand's geometry and electronics direct positioning of the phosphate anion at the π-allyl-palladium terminus, facilitating the phosphate's hydrogen-bond acceptor role toward the alcohol. Ligand-directed counteranion positioning in cationic transition metal catalysis has the potential to be a general strategy for promoting challenging bimolecular reactivity.
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Affiliation(s)
- Sven H M Kaster
- Department of Chemistry, Roger Adams Laboratory, University of Illinois, Urbana, IL, USA
| | - Lei Zhu
- Department of Chemistry, Roger Adams Laboratory, University of Illinois, Urbana, IL, USA
| | - William L Lyon
- Department of Chemistry, Roger Adams Laboratory, University of Illinois, Urbana, IL, USA
| | - Rulin Ma
- Department of Chemistry, Roger Adams Laboratory, University of Illinois, Urbana, IL, USA
| | - Stephen E Ammann
- Department of Chemistry, Roger Adams Laboratory, University of Illinois, Urbana, IL, USA
| | - M Christina White
- Department of Chemistry, Roger Adams Laboratory, University of Illinois, Urbana, IL, USA
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2
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Yin L, Zhang Z, Huang S, Wang Z, Huang C. Brønsted Acid Triggers [6/7 + 1] Cascade Cyclization by N-Alkyl Amine C(sp 3)-N Cleavage: Mild Synthesis of Benzo[1,4]oxazepane and Dihydrobenzo[1,5]oxazocine. J Org Chem 2024. [PMID: 39219061 DOI: 10.1021/acs.joc.4c01827] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 09/04/2024]
Abstract
A catalyst-free mild synthesis was reported to produce medium-ring oxazepane and oxazocine derivatives from aminomaleimides and N-alkyl amines. The substrate and acidic additives were employed to cleave the C(sp3)-N bond as a one-carbon synthon for C-C and C-O coupling, thus facilitating the [n + 1] cascade cyclization reaction, which enabled the construction of seven- and eight-membered N,O-heterocycles at room temperature. The method exhibits abroad substrate scope and remarkable tolerance toward various functional groups (seven-membered 28 examples, eight-membered 8 examples, and activated N-alkyl amine 12 examples) and utilization of natural products (2 examples).
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Affiliation(s)
- Lu Yin
- Key Laboratory of Biomass Green Chemical Conversion of Yunnan Provincial Education Department, Yunnan Key Laboratory of Chiral Functional Substance Research and Application, School of Chemistry and Environment, Yunnan Minzu University, Kunming 650504, PR China
| | - Zhou Zhang
- Key Laboratory of Biomass Green Chemical Conversion of Yunnan Provincial Education Department, Yunnan Key Laboratory of Chiral Functional Substance Research and Application, School of Chemistry and Environment, Yunnan Minzu University, Kunming 650504, PR China
| | - Shuntao Huang
- Key Laboratory of Biomass Green Chemical Conversion of Yunnan Provincial Education Department, Yunnan Key Laboratory of Chiral Functional Substance Research and Application, School of Chemistry and Environment, Yunnan Minzu University, Kunming 650504, PR China
| | - Zhuoyu Wang
- Key Laboratory of Biomass Green Chemical Conversion of Yunnan Provincial Education Department, Yunnan Key Laboratory of Chiral Functional Substance Research and Application, School of Chemistry and Environment, Yunnan Minzu University, Kunming 650504, PR China
| | - Chao Huang
- Key Laboratory of Biomass Green Chemical Conversion of Yunnan Provincial Education Department, Yunnan Key Laboratory of Chiral Functional Substance Research and Application, School of Chemistry and Environment, Yunnan Minzu University, Kunming 650504, PR China
- National and Local Joint Engineering Research Center for Green Preparation Technology of Biobased Materials, School of Chemistry and Environment, Yunnan Minzu University, Kunming 650504, PR China
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3
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Lindner H, Carreira EM. Cobalt-Catalyzed Photo-Semipinacol Rearrangement of Unactivated Allylic Alcohols. Angew Chem Int Ed Engl 2024; 63:e202407827. [PMID: 38848286 DOI: 10.1002/anie.202407827] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/24/2024] [Revised: 06/04/2024] [Accepted: 06/06/2024] [Indexed: 06/09/2024]
Abstract
We report a photochemical method for the semipinacol rearrangement of unactivated allylic alcohols. Aliphatic as well as aromatic groups participate as migrating groups, yielding a variety of α,α-disubstituted ketones. The reaction proceeds under mild conditions and is compatible with ethers, esters, halides, nitriles, carbamates, and substituted arenes. The operationally simple and fully catalytic conditions prescribe 1 mol % benzothiazinoquinoxaline as organophotocatalyst, 0.5 mol % Co-salen, and 10 mol % lutidinium triflate and, importantly, display reactivity complementary to procedures employing Brønsted acid. We showcase the utility of the protocol in late-stage drug diversifications.
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Affiliation(s)
- Henry Lindner
- Department of Chemistry and Applied Biosciences, ETH Zürich, Vladimir-Prelog-Weg 3, 8093, Zürich, Switzerland
| | - Erick M Carreira
- Department of Chemistry and Applied Biosciences, ETH Zürich, Vladimir-Prelog-Weg 3, 8093, Zürich, Switzerland
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4
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Li P, Liu Z, Huo X, Zhang W. Stereodivergent Construction of 1,5/1,7-Nonadjacent Tetrasubstituted Stereocenters Enabled by Pd/Cu-Cocatalyzed Asymmetric Heck Cascade Reaction. Angew Chem Int Ed Engl 2024; 63:e202407498. [PMID: 38752892 DOI: 10.1002/anie.202407498] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/19/2024] [Indexed: 06/28/2024]
Abstract
The construction of chiral motifs containing nonadjacent stereocenters in an enantio- and diastereoselective manner has long been a challenging task in synthetic chemistry, especially with respect to their stereodivergent synthesis. Herein, we describe a protocol that enables the enantio- and diastereoselective construction of 1,5/1,7-nonadjacent tetrasubstituted stereocenters through a Pd/Cu-cocatalyzed Heck cascade reaction. Notably, a C=C bond relay strategy involving the shift of the π-allyl palladium intermediate was successfully applied in the asymmetric construction of 1,7-nonadjacent stereocenters. The current method allows for the efficient preparation of chiral molecules bearing two privileged scaffolds, oxindoles and non-natural α-amino acids, with good functional group tolerance. The full complement of the four stereoisomers of products bearing 1,5/1,7-nonadjacent stereocenters could be readily accessed by a simple combination of two chiral metal catalysts with different enantiomers.
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Affiliation(s)
- Panpan Li
- Shanghai Key Laboratory for Molecular Engineering of Chiral Drugs, Frontiers Science Center for Transformative Molecules, School of Chemistry and Chemical Engineering, Shanghai Jiao Tong University, 800 Dongchuan Road, 200240, Shanghai, China
| | - Zijiao Liu
- Shanghai Key Laboratory for Molecular Engineering of Chiral Drugs, Frontiers Science Center for Transformative Molecules, School of Chemistry and Chemical Engineering, Shanghai Jiao Tong University, 800 Dongchuan Road, 200240, Shanghai, China
| | - Xiaohong Huo
- Shanghai Key Laboratory for Molecular Engineering of Chiral Drugs, Frontiers Science Center for Transformative Molecules, School of Chemistry and Chemical Engineering, Shanghai Jiao Tong University, 800 Dongchuan Road, 200240, Shanghai, China
| | - Wanbin Zhang
- Shanghai Key Laboratory for Molecular Engineering of Chiral Drugs, Frontiers Science Center for Transformative Molecules, School of Chemistry and Chemical Engineering, Shanghai Jiao Tong University, 800 Dongchuan Road, 200240, Shanghai, China
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5
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Lin Q, Duan Y, Li Y, Jian R, Yang K, Jia Z, Xia Y, Zhang L, Luo S. Enantioselective S N1-type reaction via electrochemically generated chiral α-Imino carbocation intermediate. Nat Commun 2024; 15:6900. [PMID: 39134515 PMCID: PMC11319787 DOI: 10.1038/s41467-024-50945-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/27/2024] [Accepted: 07/23/2024] [Indexed: 08/15/2024] Open
Abstract
Electrochemical reactions via carbocation intermediates remain fundamental transformations that build up molecular functionality and complexity in a sustainable manner. Enantioselective control of such processes is a great challenge in a highly ionic electrolyte solution. Here, we report an anodic generation of chiral α-imino carbocation intermediates by enamine catalysis. The chiral carbocation intermediates can be intercepted by a variety of nucleophiles such as alcohols, water and thiols with high stereoselectivity. The key SN1 step proceeds via a tertiary amine-mediated proton shuttle that facilitates facial selection in reacting with carbocation.
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Affiliation(s)
- Qifeng Lin
- Center of Basic Molecular Science, Department of Chemistry, Tsinghua University, Beijing, China
| | - Yingdong Duan
- Center of Basic Molecular Science, Department of Chemistry, Tsinghua University, Beijing, China
| | - Yao Li
- Center of Basic Molecular Science, Department of Chemistry, Tsinghua University, Beijing, China
| | - Ruijun Jian
- MOE Key Laboratory of Bioorganic Phosphorus Chemistry & Chemical Biology, Department of Chemistry, Tsinghua University, Beijing, China
| | - Kai Yang
- Center of Basic Molecular Science, Department of Chemistry, Tsinghua University, Beijing, China
| | - Zongbin Jia
- Center of Basic Molecular Science, Department of Chemistry, Tsinghua University, Beijing, China
| | - Yu Xia
- MOE Key Laboratory of Bioorganic Phosphorus Chemistry & Chemical Biology, Department of Chemistry, Tsinghua University, Beijing, China
| | - Long Zhang
- Center of Basic Molecular Science, Department of Chemistry, Tsinghua University, Beijing, China.
- Haihe Laboratory of Sustainable Chemical Transformations, Tianjin, China.
| | - Sanzhong Luo
- Center of Basic Molecular Science, Department of Chemistry, Tsinghua University, Beijing, China.
- Haihe Laboratory of Sustainable Chemical Transformations, Tianjin, China.
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6
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Höthker S, Plato A, Grimme S, Qu ZW, Gansäuer A. Stereoconvergent Approach to the Enantioselective Construction of α-Quaternary Alcohols by Radical Epoxide Allylation. Angew Chem Int Ed Engl 2024; 63:e202405911. [PMID: 38669602 DOI: 10.1002/anie.202405911] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/28/2024] [Revised: 04/19/2024] [Accepted: 04/19/2024] [Indexed: 04/28/2024]
Abstract
We describe a highly stereoconvergent radical epoxide allylation towards diastereomerically and enantiomerically enriched α-quaternary alcohols in two steps from olefins. Our approach combines the stereospecifity and enantioselectivity of the Shi epoxidation with the unprecedented Ti(III)-promoted intramolecular radical group transfer allylation of epoxides. A directional isomerization step via configurationally labile radical intermediates enables the selective preparation of all-carbon quaternary stereocenters in a unique fashion.
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Affiliation(s)
- Sebastian Höthker
- Kekulé-Institut für Organische Chemie und Biochemie, Universität Bonn, Gerhard-Domagk-Straße 1, 53121, Bonn, Germany
| | - Annika Plato
- Kekulé-Institut für Organische Chemie und Biochemie, Universität Bonn, Gerhard-Domagk-Straße 1, 53121, Bonn, Germany
| | - Stefan Grimme
- Mulliken Center for Theoretical Chemistry, Universität Bonn, Beringstraße 4, 53115, Bonn, Germany
| | - Zheng-Wang Qu
- Mulliken Center for Theoretical Chemistry, Universität Bonn, Beringstraße 4, 53115, Bonn, Germany
| | - Andreas Gansäuer
- Kekulé-Institut für Organische Chemie und Biochemie, Universität Bonn, Gerhard-Domagk-Straße 1, 53121, Bonn, Germany
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7
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Su Z, Tan B, Li Z, Huang H, Zhang Y. Palladium/Amine Dual-Catalyzed Tsuji-Trost Fluoroallylation of Aldehydes with gem-Difluorinated Cyclopropanes. Org Lett 2024; 26:5375-5379. [PMID: 38864753 DOI: 10.1021/acs.orglett.4c01882] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/13/2024]
Abstract
We herein disclose the Pd/amine dual-catalyzed ring-opening cross-coupling reaction between gem-difluorinated cyclopropanes (gem-F2CPs) with aldehydes, which enables the diversity-oriented synthesis (DOS) of 2-fluoroallylic aldehydes bearing all-carbon quaternary centers with features of broad scope and excellent functional group tolerance. The synthetic value of this Tsuji-Trost system was further demonstrated by late-stage functionalization of natural product-derived gem-F2CPs and the diverse synthesis of various fluoroallylic aldehyde derivatives, including alcohol, alkyne, alkene, and amine.
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Affiliation(s)
- Zheng Su
- College of Materials and Energy, South China Agricultural University, 510642 Guangzhou, China
| | - Binhong Tan
- College of Materials and Energy, South China Agricultural University, 510642 Guangzhou, China
| | - Zhaodong Li
- College of Materials and Energy, South China Agricultural University, 510642 Guangzhou, China
| | - Huicai Huang
- Key Laboratory of Chinese Medicinal Resource from Lingnan, Ministry of Education, School of Pharmaceutical Sciences, Guangzhou University of Chinese Medicine, 510006 Guangzhou, China
| | - Yue Zhang
- Key Laboratory of Chinese Medicinal Resource from Lingnan, Ministry of Education, School of Pharmaceutical Sciences, Guangzhou University of Chinese Medicine, 510006 Guangzhou, China
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8
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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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9
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Griffiths CM, Franckevičius V. The Catalytic Asymmetric Allylic Alkylation of Acyclic Enolates for the Construction of Quaternary and Tetrasubstituted Stereogenic Centres. Chemistry 2024; 30:e202304289. [PMID: 38284328 DOI: 10.1002/chem.202304289] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2023] [Revised: 01/26/2024] [Accepted: 01/29/2024] [Indexed: 01/30/2024]
Abstract
To facilitate the discovery and development of new pharmaceuticals, the demand for novel stereofunctionalised building blocks has never been greater. Whilst molecules bearing quaternary and tetrasubstituted stereogenic centres are ideally suited to explore untapped areas of chemical space, the asymmetric construction ofsterically congested carbon centres remains a longstanding challenge in organic synthesis. The enantioselective assembly of acyclic stereogenic centres is even more demanding due to the need to restrict a much wider range of geometries and conformations of the intermediates involved. In this context, the catalytic asymmetric allylicalkylation (AAA) of acyclic prochiral nucleophiles, namely enolates, has become an indispensable tool to access a range of linearα-quaternary andα-tetrasubstituted carbonyl compounds. However, unlike the AAA of cyclic enolates with a fixed enolate geometry, to achieve high levels of stereocontrol in the AAA of acyclic enolates, the stereoselectivity of enolisation must be considered. The aim of this review is to offer acomprehensivediscussion of catalytic AAA reactions of acyclic prochiral enolates and their analogues to generate congested quaternary and tetrasubstituted chiral centres using metal, non-metal and dual catalysis, with particular focus given to the control of enolate geometry and its impact on the stereochemical outcome of the reaction.
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10
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Zou S, Zhao Z, Huang H. Enantioselective Ring-Closing Aminomethylamination of Allylic Aminodienes with Aminals Triggered by C-N Bond Metathesis. Org Lett 2024. [PMID: 38502801 DOI: 10.1021/acs.orglett.4c00641] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/21/2024]
Abstract
A conceptually novel strategy utilizing a cyclopalladated complex as an electrophile to activate the C-N bond for the C-N bond metathesis between allylamines and aminals is developed, which enables an efficient ring-closing aminomethylamination of allylic aminodienes and aminals. The reaction proceeds under mild reaction conditions and displays a remarkable scope. Utilizing a modified Trost-type diphosphine as the ligand, this method enables the efficient synthesis of 5-10-membered aminoallylated chiral N-heterocycles in good yields with high enantiomeric excess values.
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Affiliation(s)
- Suchen Zou
- Key Laboratory of Precision and Intelligent Chemistry and Department of Chemistry, University of Science and Technology of China, Hefei, Anhui 230026, People's Republic of China
| | - Zeyu Zhao
- Key Laboratory of Precision and Intelligent Chemistry and Department of Chemistry, University of Science and Technology of China, Hefei, Anhui 230026, People's Republic of China
| | - Hanmin Huang
- Key Laboratory of Precision and Intelligent Chemistry and Department of Chemistry, University of Science and Technology of China, Hefei, Anhui 230026, People's Republic of China
- Key Laboratory of Green and Precise Synthetic Chemistry and Applications, Ministry of Education, Huaibei Normal University, Huaibei, Anhui 235000, People's Republic of China
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11
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Xu MM, Xie PP, He JX, Zhang YZ, Zheng C, Cai Q. Enantioselective Cross-[4 + 2]-Cycloaddition/Decarboxylation of 2-Pyrones by Cooperative Catalysis of the Pd(0)/NHC Complex and Chiral Phosphoric Acid. J Am Chem Soc 2024; 146:6936-6946. [PMID: 38414423 DOI: 10.1021/jacs.3c14409] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/29/2024]
Abstract
Here, we describe a cooperative Pd(0)/chiral phosphoric acid catalytic system that allows us to realize the first chemo-, regio-, and enantioselective sequential cross-[4 + 2]-cycloaddition/decarboxylation reaction between 2-pyrones and unactivated acyclic 1,3-dienes. The key to the success of this transformation is the utilization of an achiral N-heterocyclic carbene (NHC) as the ligand and a newly developed chiral phosphoric acid as the cocatalyst. Experimental investigations and computational studies support the idea that the Pd(0)/NHC complex acts as a π-Lewis base to increase the nucleophilicity of 1,3-dienes via η2 coordination, while the chiral phosphoric acid simultaneously increases the electrophilicity of 2-pyrones by hydrogen bonding. By this synergistic catalysis, the sequential cross-[4 + 2]-cycloaddition and decarboxylation reaction proceeds efficiently, enabling the preparation of a wide range of chiral vinyl-substituted 1,3-cyclohexadienes in good yields and enantioselectivities. The synthetic utility of this reaction is demonstrated by synthetic transformations of the product to various valuable chiral six-membered carbocycles.
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Affiliation(s)
- Meng-Meng Xu
- Department of Chemistry, Research Center for Molecular Recognition and Synthesis, Fudan University, Shanghai 200433, China
| | - Pei-Pei Xie
- State Key Laboratory of Organometallic Chemistry, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, Shanghai 200032, China
| | - Jun-Xiong He
- Department of Chemistry, Research Center for Molecular Recognition and Synthesis, Fudan University, Shanghai 200433, China
| | - Yu-Zhen Zhang
- Department of Chemistry, Research Center for Molecular Recognition and Synthesis, Fudan University, Shanghai 200433, China
| | - Chao Zheng
- State Key Laboratory of Organometallic Chemistry, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, Shanghai 200032, China
| | - Quan Cai
- Department of Chemistry, Research Center for Molecular Recognition and Synthesis, Fudan University, Shanghai 200433, China
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12
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Gupta A, Rahaman A, Bhadra S. Bioinspired Functionalization of Carbonyl Compounds Enabled by Metal Chelated Bifunctional Ligands. Chemistry 2024; 30:e202302812. [PMID: 37807759 DOI: 10.1002/chem.202302812] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/28/2023] [Revised: 09/29/2023] [Accepted: 10/04/2023] [Indexed: 10/10/2023]
Abstract
In Nature, enzymatic reactions proceed through exceptionally ordered transition states giving rise to extraordinary levels of stereoselection. In those reactions, the active site of the enzyme plays crucial roles - through one position, it holds the substrate in the proximity to the reaction epicentre that facilitates both the reactivity and stereoselectivity of the chemical process. Inspired by this natural phenomenon, synthetic chemists have designed bifunctional ligands that not only coordinate to a metal centre but also preassociate with an organic substrate, for example aldehyde and ketone, and exerts stereodirecting influence to accelerate the attack of the incoming reacting partner from a particular enantiotopic face. The chief goal of the current review is to give an overview of the recently developed approaches enabled by privileged bio-inspired bifunctional ligands that not only bind to the metal catalyst but also activates carbonyl substrates via organocatalysis, thereby easing in the new bond forming step. As carbonyl α-functionalizations are dominated by enamine and enolate chemistry, the current review primarily focusses on enamine- and enolate-metal catalysis by bifunctional ligands. Thus, developments based on traditional cooperative catalysis occurring through two directly coupled but independent catalytic cycles of an organocatalyst and a metal catalyst are not covered.
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Affiliation(s)
- Aniket Gupta
- Inorganic Materials and Catalysis Division, CSIR-Central Salt and Marine Chemicals Research Institute, GB Marg, 364002, Bhavnagar, India
- Academy of Scientific and Innovative Research (AcSIR), 201002, Ghaziabad, India
- Current address: School of Chemistry, The University of Birmingham, B15 2TT, Birmingham, UK
| | - Ajijur Rahaman
- Inorganic Materials and Catalysis Division, CSIR-Central Salt and Marine Chemicals Research Institute, GB Marg, 364002, Bhavnagar, India
- Academy of Scientific and Innovative Research (AcSIR), 201002, Ghaziabad, India
| | - Sukalyan Bhadra
- Inorganic Materials and Catalysis Division, CSIR-Central Salt and Marine Chemicals Research Institute, GB Marg, 364002, Bhavnagar, India
- Academy of Scientific and Innovative Research (AcSIR), 201002, Ghaziabad, India
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13
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Wang P, Zhu L, Wang J, Tao Z. Catalytic Asymmetric α-Alkylation of Ketones with Unactivated Alkyl Halides. J Am Chem Soc 2023; 145:27211-27217. [PMID: 38061195 DOI: 10.1021/jacs.3c09614] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2023]
Abstract
A catalytic, enantioselective method for direct α-alkylation of ketones with unactivated alkyl halides is realized by employing an α-enolizable ketone in a nickel-catalyzed C(sp3)-C(sp3) cross-coupling reaction. The key to the success is attributed to a unique bimetallic ligand. A variety of acyclic ketones and unactivated alkyl iodides can serve as suitable substrates under mild conditions to generate chiral ketones with α-quaternary carbon stereocenters in high yields with good enantioselectivities. A range of transformations based on the ketone moiety are also demonstrated to show the potential application of this method. Preliminary mechanistic studies support a dinickel-catalyzed cross-coupling mechanism.
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Affiliation(s)
- Peigen Wang
- State Key Laboratory of Chemo/Biosensing and Chemometrics, College of Chemistry and Chemical Engineering, Hunan University, Changsha 410082, People's Republic of China
| | - Liangwei Zhu
- State Key Laboratory of Chemo/Biosensing and Chemometrics, College of Chemistry and Chemical Engineering, Hunan University, Changsha 410082, People's Republic of China
| | - Jingwen Wang
- State Key Laboratory of Chemo/Biosensing and Chemometrics, College of Chemistry and Chemical Engineering, Hunan University, Changsha 410082, People's Republic of China
| | - Zhonglin Tao
- State Key Laboratory of Chemo/Biosensing and Chemometrics, College of Chemistry and Chemical Engineering, Hunan University, Changsha 410082, People's Republic of China
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14
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Zhang M, Tang ZL, Luo H, Wang XC. β-C-H Allylation of Trialkylamines with Allenes Promoted by Synergistic Borane/Palladium Catalysis. Angew Chem Int Ed Engl 2023:e202317610. [PMID: 38095883 DOI: 10.1002/anie.202317610] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/19/2023] [Indexed: 12/29/2023]
Abstract
Functionalization of the C(sp3 )-H bonds of trialkylamines is challenging, especially for reactions at positions other than the α position. Herein, we report a method for β-C(sp3 )-H allylation of trialkylamines. In these reactions, which involve synergistic borane/palladium catalysis, an enamine intermediate is first generated from the amine via α,β-dehydrogenation promoted by B(C6 F5 )3 and a base, and then the enamine undergoes palladium-catalyzed reaction with an allene to give the allylation product. Because the hydride and the proton resulting from the initial dehydrogenation are ultimately shuttled to the product by B(C6 F5 )3 and the palladium catalyst, respectively, these reactions show excellent atom economy. The establishment of this method paves the way for future studies of C-H functionalization of trialkylamines by means of synergistic borane/transition-metal catalysis.
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Affiliation(s)
- Ming Zhang
- State Key Laboratory and Institute of Elemento-Organic Chemistry, Haihe Laboratory of Sustainable Chemical Transformations, Frontiers Science Center for New Organic Matter, College of Chemistry, Nankai University, 94 Weijin Road, Tianjin, 300071, China
| | - Zi-Lu Tang
- State Key Laboratory and Institute of Elemento-Organic Chemistry, Haihe Laboratory of Sustainable Chemical Transformations, Frontiers Science Center for New Organic Matter, College of Chemistry, Nankai University, 94 Weijin Road, Tianjin, 300071, China
| | - Heng Luo
- State Key Laboratory and Institute of Elemento-Organic Chemistry, Haihe Laboratory of Sustainable Chemical Transformations, Frontiers Science Center for New Organic Matter, College of Chemistry, Nankai University, 94 Weijin Road, Tianjin, 300071, China
| | - Xiao-Chen Wang
- State Key Laboratory and Institute of Elemento-Organic Chemistry, Haihe Laboratory of Sustainable Chemical Transformations, Frontiers Science Center for New Organic Matter, College of Chemistry, Nankai University, 94 Weijin Road, Tianjin, 300071, China
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15
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Yus M, Nájera C, Foubelo F, Sansano JM. Metal-Catalyzed Enantioconvergent Transformations. Chem Rev 2023; 123:11817-11893. [PMID: 37793021 PMCID: PMC10603790 DOI: 10.1021/acs.chemrev.3c00059] [Citation(s) in RCA: 9] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/30/2023] [Indexed: 10/06/2023]
Abstract
Enantioconvergent catalysis has expanded asymmetric synthesis to new methodologies able to convert racemic compounds into a single enantiomer. This review covers recent advances in transition-metal-catalyzed transformations, such as radical-based cross-coupling of racemic alkyl electrophiles with nucleophiles or racemic alkylmetals with electrophiles and reductive cross-coupling of two electrophiles mainly under Ni/bis(oxazoline) catalysis. C-H functionalization of racemic electrophiles or nucleophiles can be performed in an enantioconvergent manner. Hydroalkylation of alkenes, allenes, and acetylenes is an alternative to cross-coupling reactions. Hydrogen autotransfer has been applied to amination of racemic alcohols and C-C bond forming reactions (Guerbet reaction). Other metal-catalyzed reactions involve addition of racemic allylic systems to carbonyl compounds, propargylation of alcohols and phenols, amination of racemic 3-bromooxindoles, allenylation of carbonyl compounds with racemic allenolates or propargyl bromides, and hydroxylation of racemic 1,3-dicarbonyl compounds.
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Affiliation(s)
- Miguel Yus
- Centro
de Innovación en Química Avanzada (ORFEO−CINQA), Universidad de Alicante, Apdo. 99, E-03080 Alicante, Spain
| | - Carmen Nájera
- Centro
de Innovación en Química Avanzada (ORFEO−CINQA), Universidad de Alicante, Apdo. 99, E-03080 Alicante, Spain
| | - Francisco Foubelo
- Centro
de Innovación en Química Avanzada (ORFEO−CINQA), Universidad de Alicante, Apdo. 99, E-03080 Alicante, Spain
- Departamento
de Química Orgánica and Instituto de Síntesis
Orgánica (ISO), Universidad de Alicante, Apdo. 99, E-03080 Alicante, Spain
| | - José M. Sansano
- Centro
de Innovación en Química Avanzada (ORFEO−CINQA), Universidad de Alicante, Apdo. 99, E-03080 Alicante, Spain
- Departamento
de Química Orgánica and Instituto de Síntesis
Orgánica (ISO), Universidad de Alicante, Apdo. 99, E-03080 Alicante, Spain
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16
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He N, Zhang J, Miao X, Li D, Wang D. Phosphine-Catalyzed Allylic Alkylation of (Hetero)Aryl Alkynes with Pronucleophiles: Concise Total Synthesis of (±)-Esermethole. Org Lett 2023; 25:6172-6177. [PMID: 37578221 DOI: 10.1021/acs.orglett.3c02275] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 08/15/2023]
Abstract
Allylic alkylations are valuable in the construction of versatile carbon-carbon bonds, which are mostly catalyzed by noble transition metals with additional waste byproduct generation. Here, we present the first organophosphine-catalyzed allylic alkylation of (hetero)aryl alkynes with various carbo-nucleophiles. The methodology is highly atom economical and compatible with a wide substrate scope (more than 38 examples). Moreover, the reaction could be easily scaled up, and deuterium labeling experiments have been conducted to elucidate the plausible mechanism. Finally, the protocol has been utilized to achieve the concise total synthesis of natural product (±)-esermethole.
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Affiliation(s)
- Ningtao He
- Key Laboratory of Marine Drugs, Ministry of Education, School of Medicine and Pharmacy, Ocean University of China, 5 Yushan Road, Qingdao 266100, China
| | - Jilong Zhang
- Key Laboratory of Marine Drugs, Ministry of Education, School of Medicine and Pharmacy, Ocean University of China, 5 Yushan Road, Qingdao 266100, China
| | - Xiaohe Miao
- Instrumentation and Service Center for Physical Sciences, Westlake University, Hangzhou 310024, China
| | - Dehai Li
- Key Laboratory of Marine Drugs, Ministry of Education, School of Medicine and Pharmacy, Ocean University of China, 5 Yushan Road, Qingdao 266100, China
- Laboratory for Marine Drugs and Bioproducts, Qingdao National Laboratory for Marine Science and Technology, 1 Wenhai Road, Qingdao 266237, China
| | - De Wang
- Key Laboratory of Marine Drugs, Ministry of Education, School of Medicine and Pharmacy, Ocean University of China, 5 Yushan Road, Qingdao 266100, China
- Laboratory for Marine Drugs and Bioproducts, Qingdao National Laboratory for Marine Science and Technology, 1 Wenhai Road, Qingdao 266237, China
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17
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Zhou Q, Yin ZW, Wu ZL, Cai T, Wen W, Huang YM, Guo QX. Asymmetric α-Allylation of N-Unprotected Amino Acid Esters with 1,3-Disubstituted Allyl Acetates Enabled by Chiral-Aldehyde/Palladium Catalysis. Org Lett 2023; 25:5790-5794. [PMID: 37523673 DOI: 10.1021/acs.orglett.3c02027] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 08/02/2023]
Abstract
A chiral aldehyde/palladium catalysis-enabled asymmetric α-allylation of NH2-unprotected amino acid esters with 1,3-disubstituted allyl acetates is described in this work. With the utilization of different chiral phosphine ligands, both the anti- and syn-selective allylation reactions are achieved enantioselectively. A series of α,α-disubstituted amino acid esters bearing two adjacent chiral centers are produced in moderate-to-excellent yields, diastereoselectivities, and enantioselectivities.
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Affiliation(s)
- Qing Zhou
- Key Laboratory of Applied Chemistry of Chongqing Municipality, School of Chemistry and Chemical Engineering, Southwest University, Chongqing, 400715, China
| | - Zhi-Wei Yin
- Key Laboratory of Applied Chemistry of Chongqing Municipality, School of Chemistry and Chemical Engineering, Southwest University, Chongqing, 400715, China
| | - Zhu-Lian Wu
- Key Laboratory of Applied Chemistry of Chongqing Municipality, School of Chemistry and Chemical Engineering, Southwest University, Chongqing, 400715, China
| | - Tian Cai
- Key Laboratory of Applied Chemistry of Chongqing Municipality, School of Chemistry and Chemical Engineering, Southwest University, Chongqing, 400715, China
| | - Wei Wen
- Key Laboratory of Applied Chemistry of Chongqing Municipality, School of Chemistry and Chemical Engineering, Southwest University, Chongqing, 400715, China
| | - Yan-Min Huang
- Guangxi Key Laboratory of Natural Polymer Chemistry and Physics, Nanning Normal University, Nanning, 530001, China
| | - Qi-Xiang Guo
- Key Laboratory of Applied Chemistry of Chongqing Municipality, School of Chemistry and Chemical Engineering, Southwest University, Chongqing, 400715, China
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18
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Ohmura S, Katagiri K, Kato H, Horibe T, Miyakawa S, Hasegawa JY, Ishihara K. Highly Enantioselective Radical Cation [2 + 2] and [4 + 2] Cycloadditions by Chiral Iron(III) Photoredox Catalysis. J Am Chem Soc 2023. [PMID: 37406156 DOI: 10.1021/jacs.3c04010] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 07/07/2023]
Abstract
Radical cations show a unique reactivity that is fundamentally different from that of conventional cations and have thus attracted considerable attention as alternative cationic intermediates for novel types of organic reactions. However, asymmetric catalysis to promote enantioselective radical cation reactions remains a major challenge in contemporary organic synthesis. Here, we report that the judicious design of an ion pair consisting of a radical cation and a chiral counteranion induces an excellent level of enantioselectivity. This strategy was applied to enantio-, diastereo-, and regioselective [2 + 2] cycloadditions, as well as enantio-, diastereo-, and regioselective [4 + 2] cycloadditions, by using chiral iron(III) photoredox catalysis. We anticipate that this strategy has the potential to expand the use of several mature chiral anions to develop numerous unprecedented enantioselective radical cation reactions.
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Affiliation(s)
- Shuhei Ohmura
- Graduate School of Engineering, Nagoya University, B2-3(611) Furo-cho, Chikusa, Nagoya 464-8603, Japan
| | - Kei Katagiri
- Graduate School of Engineering, Nagoya University, B2-3(611) Furo-cho, Chikusa, Nagoya 464-8603, Japan
| | - Haruna Kato
- Graduate School of Engineering, Nagoya University, B2-3(611) Furo-cho, Chikusa, Nagoya 464-8603, Japan
| | - Takahiro Horibe
- Graduate School of Engineering, Nagoya University, B2-3(611) Furo-cho, Chikusa, Nagoya 464-8603, Japan
| | - Sho Miyakawa
- Section of Theoretical Catalytic Chemistry, Institute for Catalysis, Hokkaido University, Sapporo, Hokkaido 001-0021, Japan
| | - Jun-Ya Hasegawa
- Section of Theoretical Catalytic Chemistry, Institute for Catalysis, Hokkaido University, Sapporo, Hokkaido 001-0021, Japan
| | - Kazuaki Ishihara
- Graduate School of Engineering, Nagoya University, B2-3(611) Furo-cho, Chikusa, Nagoya 464-8603, Japan
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19
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Ovian JM, Vojáčková P, Jacobsen EN. Enantioselective transition-metal catalysis via an anion-binding approach. Nature 2023; 616:84-89. [PMID: 36787801 PMCID: PMC10388379 DOI: 10.1038/s41586-023-05804-3] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/25/2022] [Accepted: 02/06/2023] [Indexed: 02/16/2023]
Abstract
Asymmetric transition-metal catalysis represents a powerful strategy for accessing enantiomerically enriched molecules1-3. The classical strategy for inducing enantioselectivity with transition-metal catalysts relies on direct complexation of chiral ligands to produce a sterically constrained reactive metal site that allows formation of the major product enantiomer while effectively inhibiting the pathway to the minor enantiomer through steric repulsion4. The chiral-ligand strategy has proven applicable to a wide variety of highly enantioselective transition-metal-catalysed reactions, but important scenarios exist that impose limits to its successful adaptation. Here, we report a new approach for inducing enantioselectivity in transition-metal-catalysed reactions that relies on neutral hydrogen-bond donors (HBDs)5,6 that bind anions of cationic transition-metal complexes to achieve enantiocontrol and rate enhancement through ion pairing together with other non-covalent interactions7-9. A cooperative anion-binding effect of a chiral bis-thiourea HBD is demonstrated to lead to high enantioselectivity (up to 99% enantiomeric excess) in intramolecular ruthenium-catalysed propargylic substitution reactions10. Experimental and computational mechanistic studies show the attractive interactions between electron-deficient arene components of the HBD and the metal complex that underlie enantioinduction and the acceleration effect.
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Affiliation(s)
- John M Ovian
- Department of Chemistry and Chemical Biology, Harvard University, Cambridge, MA, USA
| | - Petra Vojáčková
- Department of Chemistry and Chemical Biology, Harvard University, Cambridge, MA, USA
| | - Eric N Jacobsen
- Department of Chemistry and Chemical Biology, Harvard University, Cambridge, MA, USA.
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20
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Vera S, Landa A, Mielgo A, Ganboa I, Oiarbide M, Soloshonok V. Catalytic Asymmetric α-Functionalization of α-Branched Aldehydes. Molecules 2023; 28:molecules28062694. [PMID: 36985666 PMCID: PMC10056299 DOI: 10.3390/molecules28062694] [Citation(s) in RCA: 10] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/09/2023] [Revised: 03/14/2023] [Accepted: 03/14/2023] [Indexed: 03/19/2023] Open
Abstract
Aldehydes constitute a main class of organic compounds widely applied in synthesis. As such, catalyst-controlled enantioselective α-functionalization of aldehydes has attracted great interest over the years. In this context, α-branched aldehydes are especially challenging substrates because of reactivity and selectivity issues. Firstly, the transient trisubstituted enamines and enolates resulting upon treatment with an aminocatalyst or a base, respectively, would exhibit attenuated reactivity; secondly, mixtures of E- and Z-configured enamines/enolates may be formed; and third, effective face-discrimination on such trisubstituted sp2 carbon intermediates by the incoming electrophilic reagent is not trivial. Despite these issues, in the last 15 years, several catalytic approaches for the α-functionalization of prostereogenic α-branched aldehydes that proceed in useful yields and diastereo- and enantioselectivity have been uncovered. Developments include both organocatalytic and metal-catalyzed approaches as well as dual catalysis strategies for forging new carbon–carbon and carbon–heteroatom (C-O, N, S, F, Cl, Br, …) bond formation at Cα of the starting aldehyde. In this review, some key early contributions to the field are presented, but focus is on the most recent methods, mainly covering the literature from year 2014 onward.
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Affiliation(s)
- Silvia Vera
- Department of Organic Chemistry I, University of the Basque Country UPV/EHU, Manuel Lardizabal 3, 20018 Donostia-San Sebastián, Spain
| | - Aitor Landa
- Department of Organic Chemistry I, University of the Basque Country UPV/EHU, Manuel Lardizabal 3, 20018 Donostia-San Sebastián, Spain
| | - Antonia Mielgo
- Department of Organic Chemistry I, University of the Basque Country UPV/EHU, Manuel Lardizabal 3, 20018 Donostia-San Sebastián, Spain
- Correspondence: (A.M.); (M.O.)
| | - Iñaki Ganboa
- Department of Organic Chemistry I, University of the Basque Country UPV/EHU, Manuel Lardizabal 3, 20018 Donostia-San Sebastián, Spain
| | - Mikel Oiarbide
- Department of Organic Chemistry I, University of the Basque Country UPV/EHU, Manuel Lardizabal 3, 20018 Donostia-San Sebastián, Spain
- Correspondence: (A.M.); (M.O.)
| | - Vadim Soloshonok
- Department of Organic Chemistry I, University of the Basque Country UPV/EHU, Manuel Lardizabal 3, 20018 Donostia-San Sebastián, Spain
- IKERBASQUE, Basque Foundation for Science, Plaza Euskadi 5, 48009 Bilbao, Spain
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21
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Liu H, Liu H, Wang E, Li L, Luo Z, Cao J, Chen J, Yang L, Yang X. Hydrogen Bond Assisted Three-Component Tandem Reactions to Access N-Alkyl-4-Quinolones. Molecules 2023; 28:molecules28052304. [PMID: 36903552 PMCID: PMC10005641 DOI: 10.3390/molecules28052304] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/07/2023] [Revised: 02/15/2023] [Accepted: 02/21/2023] [Indexed: 03/06/2023] Open
Abstract
Hydrogen-bonding catalytic reactions have gained great interest. Herein, a hydrogen-bond-assisted three-component tandem reaction for the efficient synthesis of N-alkyl-4-quinolones is described. This novel strategy features the first proof of polyphosphate ester (PPE) as a dual hydrogen-bonding catalyst and the use of readily available starting materials for the preparation of N-alkyl-4-quinolones. The method provides a diversity of N-alkyl-4-quinolones in moderate to good yields. The compound 4h demonstrated good neuroprotective activity against N-methyl-ᴅ-aspartate (NMDA)-induced excitotoxicity in PC12 cells.
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Affiliation(s)
- Huanhuan Liu
- State Key Laboratory of Functions and Applications of Medicinal Plants, Guizhou Medical University, Guiyang 550014, China
- The Key Laboratory of Chemistry for Natural Products of Guizhou Province and Chinese Academy of Sciences, Guiyang 550014, China
| | - Huadan Liu
- State Key Laboratory of Functions and Applications of Medicinal Plants, Guizhou Medical University, Guiyang 550014, China
- The Key Laboratory of Chemistry for Natural Products of Guizhou Province and Chinese Academy of Sciences, Guiyang 550014, China
| | - Enhua Wang
- Department of Food and Medicine, Guizhou Vocational College of Agriculture, Qingzhen 551400, China
| | - Liangqun Li
- State Key Laboratory of Functions and Applications of Medicinal Plants, Guizhou Medical University, Guiyang 550014, China
- The Key Laboratory of Chemistry for Natural Products of Guizhou Province and Chinese Academy of Sciences, Guiyang 550014, China
| | - Zhongsheng Luo
- State Key Laboratory of Functions and Applications of Medicinal Plants, Guizhou Medical University, Guiyang 550014, China
- The Key Laboratory of Chemistry for Natural Products of Guizhou Province and Chinese Academy of Sciences, Guiyang 550014, China
| | - Jiafu Cao
- State Key Laboratory of Functions and Applications of Medicinal Plants, Guizhou Medical University, Guiyang 550014, China
- The Key Laboratory of Chemistry for Natural Products of Guizhou Province and Chinese Academy of Sciences, Guiyang 550014, China
| | - Jialin Chen
- State Key Laboratory of Functions and Applications of Medicinal Plants, Guizhou Medical University, Guiyang 550014, China
- The Key Laboratory of Chemistry for Natural Products of Guizhou Province and Chinese Academy of Sciences, Guiyang 550014, China
| | - Lishou Yang
- State Key Laboratory of Functions and Applications of Medicinal Plants, Guizhou Medical University, Guiyang 550014, China
- The Key Laboratory of Chemistry for Natural Products of Guizhou Province and Chinese Academy of Sciences, Guiyang 550014, China
- Correspondence: (L.Y.); (X.Y.)
| | - Xiaosheng Yang
- State Key Laboratory of Functions and Applications of Medicinal Plants, Guizhou Medical University, Guiyang 550014, China
- The Key Laboratory of Chemistry for Natural Products of Guizhou Province and Chinese Academy of Sciences, Guiyang 550014, China
- Correspondence: (L.Y.); (X.Y.)
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22
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Labelle A, Arndtsen BA. Chiral BINOL-based borate counterions: from cautionary tale on anion stability to enantioselective Cu-catalyzed cyclopropanation. Chem Commun (Camb) 2023; 59:728-731. [PMID: 36541187 DOI: 10.1039/d2cc05924j] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
The chiral weakly coordinating (3,3'-biphenyl-BINOL)BF2 anion can be generated by the reaction of the BINOL derivative with Cu(NCMe)4BF4. Structural analysis suggest the anion is weakly coordinating to Cu+. However, its use in cyclopropanation reactions leads to the rearrangement of the anion to create a chiral 3,3'-diphenyl-BINOL ligand that coordinates to copper. The latter suggests an important feature to consider when using weakly association anions, but can also be used to design simple chiral BINOL-based ligands for asymmetric cyclopropanation.
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Affiliation(s)
- Anthony Labelle
- Department of Chemistry, McGill University, 801 Sherbrooke Street West, Montreal, QC, H3A 0B8, Canada.
| | - Bruce A Arndtsen
- Department of Chemistry, McGill University, 801 Sherbrooke Street West, Montreal, QC, H3A 0B8, Canada.
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23
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Liu WK, Wang BL, Zhou SS, Shen JH, Wang Z, Wang XW. COAP/Pd-Catalyzed Linear Asymmetric Allylic Alkylation for Optically Active 3,3-Disubstituted Oxindole Derivatives with a Four-Carbon Amino Side Chain. Org Lett 2023; 25:104-108. [PMID: 36583996 DOI: 10.1021/acs.orglett.2c03902] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
An asymmetric linear selective allylic alkylation of vinylaziridines with 3-aryl oxindoles has been developed by using a chiral oxamide-phosphine (COAP-Bn-OMe-p)/palladium complex in methanol, which furnished a wide variety of 3,3-disubstituted oxindole derivatives in good yields with excellent regio- and enantioselectivities.
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Affiliation(s)
- Wen-Kai Liu
- Key Laboratory of Organic Synthesis of Jiangsu Province, College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou 215123, P. R. China
| | - Bai-Lin Wang
- Key Laboratory of Organic Synthesis of Jiangsu Province, College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou 215123, P. R. China
| | - Sheng-Suo Zhou
- Key Laboratory of Organic Synthesis of Jiangsu Province, College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou 215123, P. R. China
| | - Jun-Hao Shen
- Key Laboratory of Organic Synthesis of Jiangsu Province, College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou 215123, P. R. China
| | - Zheng Wang
- State Key Laboratory of Organometallic Chemistry, Center for Excellence in Molecular Synthesis, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, Shanghai 200032, P. R. China
| | - Xing-Wang Wang
- Key Laboratory of Organic Synthesis of Jiangsu Province, College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou 215123, P. R. China
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24
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Chen YY, Zhou CD, Li XT, Yang TY, Han WY, Wan NW, Chen YZ, Cui BD. Cooperative Tertiary Amine/Palladium-Catalyzed Sequential [4 + 3] Cyclization/[1,3]-Rearrangement for Stereoselective Synthesis of Spiro [Methylenecyclopentane-1,3'-oxindolines]. J Org Chem 2023; 88:371-383. [PMID: 36563325 DOI: 10.1021/acs.joc.2c02393] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
A cooperative tertiary amine/palladium-catalyzed sequential reaction process, proceeding via a [4 + 3] cyclization of isatin-derived Morita-Baylis-Hillman Expansion (MBH) carbonates and tert-butyl 2-(hydroxymethyl)allyl carbonates followed by a [1,3]-rearrangement, has been found and developed. A range of structurally diverse spiro[methylene cyclopentane-1,3'-oxindolines] bearing two adjacent β,γ-acyl quaternary carbon stereocenters, which are difficult to obtain by conventional strategies, were obtained in good yields. Further synthetic utility of this protocol is highlighted by its excellent regio- and stereocontrol as well as the large-scale synthesis and diverse functional transformations of the synthetic compounds. Moreover, the control experiments probably established the plausible mechanism for this sequential [4 + 3] cyclization/[1,3]-rearrangement process.
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Affiliation(s)
- Yue-You Chen
- Key Laboratory of Biocatalysis & Chiral Drug Synthesis of Guizhou Province, School of Pharmacy, Zunyi Medical University, Zunyi 563000, China.,Key Laboratory of Basic Pharmacology of Ministry of Education and Joint International Research Laboratory of Ethnomedicine of Ministry of Education, Zunyi Medical University, Zunyi 563000, China
| | - Chen-Dong Zhou
- Key Laboratory of Biocatalysis & Chiral Drug Synthesis of Guizhou Province, School of Pharmacy, Zunyi Medical University, Zunyi 563000, China.,Key Laboratory of Basic Pharmacology of Ministry of Education and Joint International Research Laboratory of Ethnomedicine of Ministry of Education, Zunyi Medical University, Zunyi 563000, China
| | - Xing-Tong Li
- Key Laboratory of Biocatalysis & Chiral Drug Synthesis of Guizhou Province, School of Pharmacy, Zunyi Medical University, Zunyi 563000, China.,Key Laboratory of Basic Pharmacology of Ministry of Education and Joint International Research Laboratory of Ethnomedicine of Ministry of Education, Zunyi Medical University, Zunyi 563000, China
| | - Ting-You Yang
- Key Laboratory of Biocatalysis & Chiral Drug Synthesis of Guizhou Province, School of Pharmacy, Zunyi Medical University, Zunyi 563000, China.,Key Laboratory of Basic Pharmacology of Ministry of Education and Joint International Research Laboratory of Ethnomedicine of Ministry of Education, Zunyi Medical University, Zunyi 563000, China
| | - Wen-Yong Han
- Key Laboratory of Biocatalysis & Chiral Drug Synthesis of Guizhou Province, School of Pharmacy, Zunyi Medical University, Zunyi 563000, China.,Key Laboratory of Basic Pharmacology of Ministry of Education and Joint International Research Laboratory of Ethnomedicine of Ministry of Education, Zunyi Medical University, Zunyi 563000, China
| | - Nan-Wei Wan
- Key Laboratory of Biocatalysis & Chiral Drug Synthesis of Guizhou Province, School of Pharmacy, Zunyi Medical University, Zunyi 563000, China.,Key Laboratory of Basic Pharmacology of Ministry of Education and Joint International Research Laboratory of Ethnomedicine of Ministry of Education, Zunyi Medical University, Zunyi 563000, China
| | - Yong-Zheng Chen
- Key Laboratory of Biocatalysis & Chiral Drug Synthesis of Guizhou Province, School of Pharmacy, Zunyi Medical University, Zunyi 563000, China.,Key Laboratory of Basic Pharmacology of Ministry of Education and Joint International Research Laboratory of Ethnomedicine of Ministry of Education, Zunyi Medical University, Zunyi 563000, China
| | - Bao-Dong Cui
- Key Laboratory of Biocatalysis & Chiral Drug Synthesis of Guizhou Province, School of Pharmacy, Zunyi Medical University, Zunyi 563000, China.,Key Laboratory of Basic Pharmacology of Ministry of Education and Joint International Research Laboratory of Ethnomedicine of Ministry of Education, Zunyi Medical University, Zunyi 563000, China
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25
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García Mancheño O, Waser M. Recent Developments and Trends in Asymmetric Organocatalysis. European J Org Chem 2023; 26:e202200950. [PMID: 37065706 PMCID: PMC10091998 DOI: 10.1002/ejoc.202200950] [Citation(s) in RCA: 15] [Impact Index Per Article: 15.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/11/2022] [Revised: 09/13/2022] [Indexed: 11/11/2022]
Abstract
Asymmetric organocatalysis has experienced a long and spectacular way since the early reports over a century ago by von Liebig, Knoevenagel and Bredig, showing that small (chiral) organic molecules can catalyze (asymmetric) reactions. This was followed by impressive first highly enantioselective reports in the second half of the last century, until the hype initiated in 2000 by the milestone publications of MacMillan and List, which finally culminated in the 2021 Nobel Prize in Chemistry. This short Perspective aims at providing a brief introduction to the field by first looking on the historical development and the more classical methods and concepts, followed by discussing selected advanced recent examples that opened new directions and diversity within this still growing field.
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Affiliation(s)
- Olga García Mancheño
- Organic Chemistry InstituteUniversity of MünsterCorrensstrasse 3648149MünsterGermany
| | - Mario Waser
- Institute of Organic ChemistryJohannes Kepler University LinzAltenbergerstrasse 694040LinzAustria
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26
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Xiang X, He Z, Dong X. Recent Advances of Efficient Synthesis of Chiral Molecules Promoted by Pd/Chiral Phosphoric Acid Synergistic Catalysis. CHINESE J ORG CHEM 2023. [DOI: 10.6023/cjoc202211043] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/22/2023]
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27
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Hua RY, Yu SF, Jie XT, Qiu H, Hu WH. Multicomponent Assembly of Complex Oxindoles by Enantioselective Cooperative Catalysis. Angew Chem Int Ed Engl 2022; 61:e202213407. [PMID: 36266979 DOI: 10.1002/anie.202213407] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/11/2022] [Indexed: 11/22/2022]
Abstract
Chiral oxindoles are important chemical scaffolds found in many natural products, and their enantioselective synthesis thus attracts considerable attention. Highly diastereo- and enantioselective synthetic methods for constructing C3 quaternary oxindoles have been well-developed. However, the efficient synthesis of chiral 3-substituted tertiary oxindoles has been rarely reported due to the ease of racemization of the tertiary stereocenter via enolization. Therefore, we herein report on the multicomponent assembly (from N-aryl diazoamides, aldehydes, and enamines/indoles) of complex oxindoles by enantioselective cooperative catalysis. These reactions proceed under mild conditions and show broad substrate scope, affording the desired coupling products (>90 examples) with good to excellent stereocontrol. Additionally, this research also demonstrates the synthetic potential of this annulation by constructing the 6,6,5-tricyclic lactone core structure of Speradine A.
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Affiliation(s)
- Ru-Yu Hua
- Guangdong Provincial Key Laboratory of Chiral Molecule and Drug Discovery, School of Pharmaceutical Sciences, Sun Yat-sen University, Guangzhou, 510006, P. R. China
| | - Si-Fan Yu
- Guangdong Provincial Key Laboratory of Chiral Molecule and Drug Discovery, School of Pharmaceutical Sciences, Sun Yat-sen University, Guangzhou, 510006, P. R. China
| | - Xiao-Ting Jie
- Guangdong Provincial Key Laboratory of Chiral Molecule and Drug Discovery, School of Pharmaceutical Sciences, Sun Yat-sen University, Guangzhou, 510006, P. R. China
| | - Huang Qiu
- Guangdong Provincial Key Laboratory of Chiral Molecule and Drug Discovery, School of Pharmaceutical Sciences, Sun Yat-sen University, Guangzhou, 510006, P. R. China
| | - Wen-Hao Hu
- Guangdong Provincial Key Laboratory of Chiral Molecule and Drug Discovery, School of Pharmaceutical Sciences, Sun Yat-sen University, Guangzhou, 510006, P. R. China
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28
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Zhu CL, Yao Y, Lu CD. Stereocontrolled α-Allylation of α-Branched N- tert-Butanesulfinyl Ketimines via a Michael-Wittig Cascade for the Construction of Acyclic Quaternary Stereocenters. Org Lett 2022; 24:8925-8929. [PMID: 36445047 DOI: 10.1021/acs.orglett.2c03801] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/03/2022]
Abstract
A single-flask cascade of Michael addition and Wittig olefination was developed to allow the stereoselective α-allylic alkylation of α-branched N-tert-butanesulfinyl ketimines for the construction of acyclic quaternary stereocenters bearing two sterically and electronically similar substituents. In this process, tBuOK-promoted stereoselective α-deprotonation gives fully substituted aza-enolates with a stereodefined geometry, Michael addition with α,β-unsaturated phosphonates generates C-C bonds with exceptional stereocontrol, and finally paraformaldehyde trapping of the conjugate addition intermediate generates functionalized α-allylated imines.
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Affiliation(s)
- Chong-Lin Zhu
- School of Chemical Science and Technology, Yunnan University, Kunming, Yunnan 650091, China
- Southwest United Graduate School, Kunming, Yunnan 650092, China
| | - Yun Yao
- School of Chemical Science and Technology, Yunnan University, Kunming, Yunnan 650091, China
| | - Chong-Dao Lu
- School of Chemical Science and Technology, Yunnan University, Kunming, Yunnan 650091, China
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29
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Biphenyl aldehyde-based ternary catalytic system catalyzed Tsuji–Trost allylation of N-unprotected amino acid esters. Tetrahedron 2022. [DOI: 10.1016/j.tet.2022.133235] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
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30
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Zhu F, Li CX, Wu ZL, Cai T, Wen W, Guo QX. Chiral aldehyde-nickel dual catalysis enables asymmetric α-propargylation of amino acids and stereodivergent synthesis of NP25302. Nat Commun 2022; 13:7290. [PMID: 36435942 PMCID: PMC9701212 DOI: 10.1038/s41467-022-35062-2] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/10/2022] [Accepted: 11/16/2022] [Indexed: 11/28/2022] Open
Abstract
The combined catalytic systems derived from organocatalysts and transition metals exhibit powerful activation and stereoselective-control abilities in asymmetric catalysis. This work describes a highly efficient chiral aldehyde-nickel dual catalytic system and its application for the direct asymmetric α-propargylation reaction of amino acid esters with propargylic alcohol derivatives. Various structural diversity α,α-disubstituted non-proteinogenic α-amino acid esters are produced in good-to-excellent yields and enantioselectivities. Furthermore, a stereodivergent synthesis of natural product NP25302 is achieved, and a reasonable reaction mechanism is proposed to illustrate the observed stereoselectivity based on the results of control experiments, nonlinear effect investigation, and HRMS detection.
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Affiliation(s)
- Fang Zhu
- Key Laboratory of Applied Chemistry of Chongqing Municipality, and Chongqing Key Laboratory of Soft-Matter Material Chemistry and Function Manufacturing, School of Chemistry and Chemical Engineering, Southwest University, Chongqing, 400715, China
| | - Chao-Xing Li
- Key Laboratory of Applied Chemistry of Chongqing Municipality, and Chongqing Key Laboratory of Soft-Matter Material Chemistry and Function Manufacturing, School of Chemistry and Chemical Engineering, Southwest University, Chongqing, 400715, China
| | - Zhu-Lian Wu
- Key Laboratory of Applied Chemistry of Chongqing Municipality, and Chongqing Key Laboratory of Soft-Matter Material Chemistry and Function Manufacturing, School of Chemistry and Chemical Engineering, Southwest University, Chongqing, 400715, China
| | - Tian Cai
- Key Laboratory of Applied Chemistry of Chongqing Municipality, and Chongqing Key Laboratory of Soft-Matter Material Chemistry and Function Manufacturing, School of Chemistry and Chemical Engineering, Southwest University, Chongqing, 400715, China
| | - Wei Wen
- Key Laboratory of Applied Chemistry of Chongqing Municipality, and Chongqing Key Laboratory of Soft-Matter Material Chemistry and Function Manufacturing, School of Chemistry and Chemical Engineering, Southwest University, Chongqing, 400715, China.
| | - Qi-Xiang Guo
- Key Laboratory of Applied Chemistry of Chongqing Municipality, and Chongqing Key Laboratory of Soft-Matter Material Chemistry and Function Manufacturing, School of Chemistry and Chemical Engineering, Southwest University, Chongqing, 400715, China.
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31
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Qiu ZW, Long L, Zhu ZQ, Liu HF, Pan HP, Ma AJ, Peng JB, Wang YH, Gao H, Zhang XZ. Asymmetric Three-Component Reaction to Assemble the Acyclic All-Carbon Quaternary Stereocenter via Visible Light and Phosphoric Acid Catalysis. ACS Catal 2022. [DOI: 10.1021/acscatal.2c03879] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Zong-Wang Qiu
- School of Biotechnology and Health Sciences, Wuyi University, Jiangmen 529020, Guangdong, China
| | - Liang Long
- Institute of Traditional Chinese Medicine & Natural Products, College of Pharmacy/Guangdong Province Key Laboratory of Pharmacodynamic Constituents of TCM and New Drugs Research/International Cooperative Laboratory of Traditional Chinese Medicine Modernization and Innovative Drug Development of Chinese Ministry of Education of China (MOE), Jinan University, Guangzhou 510632, China
| | - Zhi-Qiang Zhu
- School of Biotechnology and Health Sciences, Wuyi University, Jiangmen 529020, Guangdong, China
| | - Hong-Fu Liu
- School of Biotechnology and Health Sciences, Wuyi University, Jiangmen 529020, Guangdong, China
| | - Han-Peng Pan
- School of Biotechnology and Health Sciences, Wuyi University, Jiangmen 529020, Guangdong, China
| | - Ai-Jun Ma
- School of Biotechnology and Health Sciences, Wuyi University, Jiangmen 529020, Guangdong, China
| | - Jin-Bao Peng
- School of Biotechnology and Health Sciences, Wuyi University, Jiangmen 529020, Guangdong, China
| | - Yong-Heng Wang
- Institute of Traditional Chinese Medicine & Natural Products, College of Pharmacy/Guangdong Province Key Laboratory of Pharmacodynamic Constituents of TCM and New Drugs Research/International Cooperative Laboratory of Traditional Chinese Medicine Modernization and Innovative Drug Development of Chinese Ministry of Education of China (MOE), Jinan University, Guangzhou 510632, China
| | - Hao Gao
- Institute of Traditional Chinese Medicine & Natural Products, College of Pharmacy/Guangdong Province Key Laboratory of Pharmacodynamic Constituents of TCM and New Drugs Research/International Cooperative Laboratory of Traditional Chinese Medicine Modernization and Innovative Drug Development of Chinese Ministry of Education of China (MOE), Jinan University, Guangzhou 510632, China
| | - Xiang-Zhi Zhang
- School of Biotechnology and Health Sciences, Wuyi University, Jiangmen 529020, Guangdong, China
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32
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Martí À, Montesinos‐Magraner M, Echavarren AM, Franchino A. H-Bonded Counterion-Directed Catalysis: Enantioselective Gold(I)-Catalyzed Addition to 2-Alkynyl Enones as a Case Study. European J Org Chem 2022; 2022:e202200518. [PMID: 36590458 PMCID: PMC9796400 DOI: 10.1002/ejoc.202200518] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/04/2022] [Revised: 06/13/2022] [Indexed: 01/04/2023]
Abstract
H-bonded counterion-directed catalysis (HCDC) is a strategy wherein a chiral anion that is hydrogen-bonded to the achiral ligand of a metal complex is responsible for enantioinduction. In this article we present the application of H-bonded counterion-directed catalysis to the Au(I)-catalyzed enantioselective tandem cycloisomerization-addition reaction of 2-alkynyl enones. Following the addition of C-, N- or O-centered nucleophiles, bicyclic furans were obtained in moderate to excellent yield and enantioselectivity (28 examples, 59-96 % yield, 62 : 38 to 95 : 5 er). The optimal catalytic system, comprising a phosphinosquaramide Au(I) chloride complex and a BINOL-derived phosphoramidate Ag(I) salt, was selected in a combinatorial fashion from a larger library with the help of high-throughput screening. An enantioselectivity switch of ca. 120 Δee% was observed upon addition of the achiral Au(I) component to the Ag(I) salt.
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Affiliation(s)
- Àlex Martí
- Institute of Chemical Research of Catalonia (ICIQ)Barcelona Institute of Science and Technology (BIST) Av. PaïsosCatalans 1643007TarragonaSpain
- Departament de Química Orgànica i AnalíticaUniversitat Rovira i Virgili (URV) C/ Marcel⋅lí Domingo s/n43007TarragonaSpain
| | - Marc Montesinos‐Magraner
- Institute of Chemical Research of Catalonia (ICIQ)Barcelona Institute of Science and Technology (BIST) Av. PaïsosCatalans 1643007TarragonaSpain
| | - Antonio M. Echavarren
- Institute of Chemical Research of Catalonia (ICIQ)Barcelona Institute of Science and Technology (BIST) Av. PaïsosCatalans 1643007TarragonaSpain
- Departament de Química Orgànica i AnalíticaUniversitat Rovira i Virgili (URV) C/ Marcel⋅lí Domingo s/n43007TarragonaSpain
| | - Allegra Franchino
- Institute of Chemical Research of Catalonia (ICIQ)Barcelona Institute of Science and Technology (BIST) Av. PaïsosCatalans 1643007TarragonaSpain
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33
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Gillespie J, Fanourakis A, Phipps RJ. Strategies That Utilize Ion Pairing Interactions to Exert Selectivity Control in the Functionalization of C-H Bonds. J Am Chem Soc 2022; 144:18195-18211. [PMID: 36178308 PMCID: PMC9562467 DOI: 10.1021/jacs.2c08752] [Citation(s) in RCA: 17] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/17/2022] [Indexed: 11/30/2022]
Abstract
Electrostatic attraction between two groups of opposite charge, typically known as ion-pairing, offers unique opportunities for the design of systems to enable selectivity control in chemical reactions. Catalysis using noncovalent interactions is an established and vibrant research area, but it is noticeable that hydrogen bonding interactions are still the main interaction of choice in system design. Opposite charges experience the powerful force of Coulombic attraction and have the ability to exert fundamental influence on the outcome of reactions that involve charged reagents, intermediates or catalysts. In this Perspective, we will examine how ion-pairing interactions have been used to control selectivity in C-H bond functionalization processes. This broad class of reactions provides an interesting and thought-provoking lens through which to examine the application of ion-pairing design strategies because it is one that encompasses great mechanistic diversity, poses significant selectivity challenges, and perhaps most importantly is of immense interest to synthetic chemists in both industry and academia. We survey reactions that proceed via radical and ionic mechanisms alongside those that involve transition metal catalysis and will deal with control of site-selectivity and enantioselectivity. We anticipate that as this emerging area develops, it will become an ever-more important design strategy for selectivity control.
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Affiliation(s)
| | | | - Robert J. Phipps
- Yusuf Hamied Department of Chemistry, University of Cambridge, Lensfield Road, Cambridge CB2 1EW, U.K.
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34
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Yu H, Zhang Q, Zi W. Enantioselective Three‐Component Photochemical 1,4‐Bisalkylation of 1,3‐Butadiene with Pd/Cu Catalysis. Angew Chem Int Ed Engl 2022; 61:e202208411. [DOI: 10.1002/anie.202208411] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/08/2022] [Indexed: 12/26/2022]
Affiliation(s)
- Huimin Yu
- State Key Laboratory and Institute of Elemento-Organic Chemistry College of Chemistry Nankai University Tianjin 300071 China
| | - Qinglong Zhang
- State Key Laboratory and Institute of Elemento-Organic Chemistry College of Chemistry Nankai University Tianjin 300071 China
- Haihe Laboratory of Sustainable Chemical Transformations Tianjin 300071 China
| | - Weiwei Zi
- State Key Laboratory and Institute of Elemento-Organic Chemistry College of Chemistry Nankai University Tianjin 300071 China
- Haihe Laboratory of Sustainable Chemical Transformations Tianjin 300071 China
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35
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Chen X, Gilissen PJ, Tinnemans P, Vanthuyne N, Rutjes FPJT, Feringa BL, Elemans JAAW, Nolte RJM. Enantiodivergent epoxidation of alkenes with a photoswitchable phosphate manganese-salen complex. NATURE SYNTHESIS 2022; 1:873-882. [PMID: 36353682 PMCID: PMC7613796 DOI: 10.1038/s44160-022-00157-7] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
The development of enantiodivergent catalysts capable of preparing both enantiomeric products from one substrate in a controlled fashion is challenging. Introducing a switching function into the catalyst can address this challenge, allowing the chiral reaction environment to reversibly change during catalysis. Here we report a photoswitchable phosphate ligand, derived from 2,2'-biphenol, which axially coordinates as the counter ion to an achiral manganese(III) salen catalyst, providing the latter with the ability to switch stereoselectivity in the epoxidation of alkenes. The enantiomers of the chiral ligand exist as a pair of pseudo-enantiomers, which can be interconverted by irradiation with light of different wavelengths. The opposite axial chirality of these pseudo-enantiomers is efficiently transferred to the manganese(III) salen catalyst. With this switchable supramolecular catalyst, the enantioselectivity of the epoxidation of a variety of alkenes can be controlled, resulting in opposite enantiomeric excesses of the epoxide products. This transfer of chirality from a photoswitchable anionic ligand to a metal complex broadens the scope of supramolecular catalysts.
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Affiliation(s)
- Xiaofei Chen
- Institute for Molecules and Materials, Radboud University, Heyendaalseweg 135, 6525 AJ Nijmegen, The Netherlands
| | - Pieter J Gilissen
- Institute for Molecules and Materials, Radboud University, Heyendaalseweg 135, 6525 AJ Nijmegen, The Netherlands
| | - Paul Tinnemans
- Institute for Molecules and Materials, Radboud University, Heyendaalseweg 135, 6525 AJ Nijmegen, The Netherlands
| | - Nicolas Vanthuyne
- Aix Marseille Univ, CNRS, Centrale Marseille, iSm2, Marseille, France
| | - Floris P J T Rutjes
- Institute for Molecules and Materials, Radboud University, Heyendaalseweg 135, 6525 AJ Nijmegen, The Netherlands
| | - Ben L Feringa
- Stratingh Institute for Chemistry, University of Groningen, Nijenborgh 4, 9747 AG Groningen, The Netherlands
| | - Johannes A A W Elemans
- Institute for Molecules and Materials, Radboud University, Heyendaalseweg 135, 6525 AJ Nijmegen, The Netherlands
| | - Roeland J M Nolte
- Institute for Molecules and Materials, Radboud University, Heyendaalseweg 135, 6525 AJ Nijmegen, The Netherlands
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36
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Del Vecchio A, Sinibaldi A, Nori V, Giorgianni G, Di Carmine G, Pesciaioli F. Synergistic Strategies in Aminocatalysis. Chemistry 2022; 28:e202200818. [PMID: 35666172 PMCID: PMC9539941 DOI: 10.1002/chem.202200818] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/15/2022] [Indexed: 12/20/2022]
Abstract
Synergistic catalysis offers the unique possibility of simultaneous activation of both the nucleophile and the electrophile in a reaction. A requirement for this strategy is the stability of the active species towards the reaction conditions and the two concerted catalytic cycles. Since the beginning of the century, aminocatalysis has been established as a platform for the stereoselective activation of carbonyl compounds through HOMO-raising or LUMO-lowering. The burgeoning era of aminocatalysis has been driven by a deep understanding of these activation and stereoinduction modes, thanks to the introduction of versatile and privileged chiral amines. The aim of this review is to cover recent developments in synergistic strategies involving aminocatalysis in combination with organo-, metal-, photo-, and electro-catalysis, focusing on the evolution of privileged aminocatalysts architectures.
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Affiliation(s)
- Antonio Del Vecchio
- Department of Physical and Chemical Sciences Università degli Studidell'Aquilavia Vetoio67100L'AquilaItaly
| | - Arianna Sinibaldi
- Department of Physical and Chemical Sciences Università degli Studidell'Aquilavia Vetoio67100L'AquilaItaly
| | - Valeria Nori
- Department of Physical and Chemical Sciences Università degli Studidell'Aquilavia Vetoio67100L'AquilaItaly
| | - Giuliana Giorgianni
- Department of Physical and Chemical Sciences Università degli Studidell'Aquilavia Vetoio67100L'AquilaItaly
| | - Graziano Di Carmine
- Department of Chemical, Pharmaceutical and Agricultural Sciences Università degli Studi di FerraraVia Fossato di Mortara 1744121FerraraItaly
| | - Fabio Pesciaioli
- Department of Physical and Chemical Sciences Università degli Studidell'Aquilavia Vetoio67100L'AquilaItaly
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37
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Gupta A, Saha A, Rahaman A, Kumar J, Suresh E, Ganguly B, Bhadra S. Cooperativity between the Substrate and Ligand in Palladium-Catalyzed Allylic Alkylation Using 1-Aryl-1-propynes. J Org Chem 2022; 87:10366-10371. [DOI: 10.1021/acs.joc.2c00592] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Aniket Gupta
- Academy of Scientific and Innovative Research (AcSIR), Ghaziabad 201002, India
| | - Anusuya Saha
- Academy of Scientific and Innovative Research (AcSIR), Ghaziabad 201002, India
| | - Ajijur Rahaman
- Academy of Scientific and Innovative Research (AcSIR), Ghaziabad 201002, India
| | - Jogendra Kumar
- Academy of Scientific and Innovative Research (AcSIR), Ghaziabad 201002, India
| | - Eringathodi Suresh
- Academy of Scientific and Innovative Research (AcSIR), Ghaziabad 201002, India
| | - Bishwajit Ganguly
- Academy of Scientific and Innovative Research (AcSIR), Ghaziabad 201002, India
| | - Sukalyan Bhadra
- Academy of Scientific and Innovative Research (AcSIR), Ghaziabad 201002, India
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38
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Yoshino T. Enantioselective C–H Functionalization Using High-Valent Group 9 Metal Catalysts. BULLETIN OF THE CHEMICAL SOCIETY OF JAPAN 2022. [DOI: 10.1246/bcsj.20220168] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Tatsuhiko Yoshino
- Faculty of Pharmaceutical Sciences, Hokkaido University, Kita-12 Nishi-6, Kita-ku, Sapporo 060-0812
- Global Station for Biosurfaces and Drug Discovery, Hokkaido University, Kita-12 Nishi-6, Kita-ku, Sapporo 060-0812
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39
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Mondal P, Pal R, Pal AK, Das S, Misra A, Datta A. Understanding the Regioselectivity of Ion-Pair-Assisted Meta-Selective C(sp 2)-H Activation in Conformationally Flexible Arylammonium Salts. J Org Chem 2022; 87:9222-9231. [PMID: 35771188 DOI: 10.1021/acs.joc.2c00957] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
The lack of directionality and the long-range nature of Coulomb interactions have been a bottleneck to achieve chemically precise C-H activation using ion-pairs. Recent report by Phipps and co-workers of the ion-pair-directed regioselective Iridium-catalyzed borylation opens a new direction toward harnessing noncovalent interactions for C-H activation. In this article, the mechanism and specific role of ion-pairing are investigated using density functional theory (DFT). Computational studies reveal that meta C-H activation is kinetically more favorable than the para analogue due to stronger electrostatic interactions between the ion-pairs in closer proximity [d(NMe3+···SO3-)TSP1m = 3.93 Å versus d(NMe3+···SO3-)TSP1p = 4.30 Å]. The electrostatic interactions overwhelm the Pauli repulsion and distortion interactions incurred in bringing the oppositely charged ions in close contact for the rate-limiting meta transition state (TSP1m). Multiple linear regression shows that the free energies of activation correlate well with descriptors like the charge densities on the meta carbon and Ir atom along with that on the cation and anion with R2 = 0.74. Tuned range-separated DFT calculations demonstrate accurately the localization of charge separation in the reactant complex and transition state for the meta selectivity.
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Affiliation(s)
- Partha Mondal
- School of Chemical Sciences, Indian Association for the Cultivation of Science, Jadavpur, Kolkata 700032, West Bengal, India
| | - Rapti Pal
- Department of Chemistry, Indian Institute of Science Education and Research (IISER), Pune 411008, India
| | - Arun K Pal
- School of Chemical Sciences, Indian Association for the Cultivation of Science, Jadavpur, Kolkata 700032, West Bengal, India
| | - Soumik Das
- Department of Chemistry, University of North Bengal, Dist-Darjeeling 734013, India
| | - Anirban Misra
- Department of Chemistry, University of North Bengal, Dist-Darjeeling 734013, India
| | - Ayan Datta
- School of Chemical Sciences, Indian Association for the Cultivation of Science, Jadavpur, Kolkata 700032, West Bengal, India
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40
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Yu H, Zhang Q, Zi W. Enantioselective Three‐Component Photochemical 1,4‐Bisalkylation of 1,3‐Butadiene with Pd/Cu Catalysis. Angew Chem Int Ed Engl 2022. [DOI: 10.1002/ange.202208411] [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)
- Huimin Yu
- Nankai University College of Chemistry State Key Laboratory and Institute of Elemento-Organic Chemistry CHINA
| | - Qinglong Zhang
- Nankai University College of Chemistry State Key Laboratory and Institute of Elemento-Organic Chemistry CHINA
| | - Weiwei Zi
- State Key Laboratory and Institute of Elemento-Organic Chemistry Chemistry Department of Nankai University 94 Weijin Rd. 300071 Tianjin CHINA
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41
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Jia L, Zhao J, Hu X. Molecular Iodine-Catalyzed N-Benzylic Sulfonamides C-N Bond Cleavage for the Decarboxylative Substitution of β-Keto Acids. LETT ORG CHEM 2022. [DOI: 10.2174/1570178619666220516124320] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Abstract:
A molecular iodine-catalyzed system for the decarboxylative substitution reactions of β-keto acids with N-benzylic sulfonamides via sp3 C-N bond cleavage has been disclosed. This procedure provides a series of α-functionalized ketones in good to excellent yields. Furthermore, the practicability of this method could be manifested efficiently in a gram-scale synthesis.
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Affiliation(s)
- Lina Jia
- College of Chemistry and Chemical Engineering, Qiqihar University, Qiqihar 161006, China
- Heilongjiang Provincial Key Laboratory of Catalytic Synthesis for Fine Chemicals, Qiqihar 161006, China
| | - Jinyu Zhao
- Heilongjiang Provincial Key Laboratory of Catalytic Synthesis for Fine Chemicals, Qiqihar 161006, China
| | - Xiangping Hu
- Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, China
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42
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Kon Y, Tsurumi S, Yamada S, Yokoi T, Fujitani T. Selective monoallylation of anilines to N-allyl anilines using reusable zirconium dioxide supported tungsten oxide solid catalyst. RSC Adv 2022; 12:11877-11884. [PMID: 35481092 PMCID: PMC9016830 DOI: 10.1039/d2ra00198e] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/11/2022] [Accepted: 03/30/2022] [Indexed: 11/21/2022] Open
Abstract
The monoallylation of aniline to give N-allyl aniline is a fundamental transformation process that results in various kinds of valuable building block allyl compounds, which can be used in the production of pharmaceuticals and electronic materials. For decades, sustainable syntheses have been gaining much attention, and the employment of allyl alcohol as an allyl source can follow the sustainability due to the formation of only water as a coproduct through dehydrative monoallylation. Although the use of homogeneous metal complex catalysts is a straightforward choice for the acceleration of dehydrative monoallylation, the use of soluble catalysts tends to contaminate products. We herein present a 10 wt% WO3/ZrO2 catalyzed monoallylation process of aniline to give N-allyl anilines in good yields with excellent selectivity, which enables the continuous selective flow syntheses of N-allyl aniline with 97-99% selectivity. The performed detailed study about the catalytic mechanism suggests that the dispersed WO3 with the preservation of the W(vi) oxidation state of 10 wt% WO3/ZrO2 with appropriate acidity and basicity is crucial for the monoallylation. The inhibition of the over allylation of the N-allyl anilines is explained by the unwilling contact of the N-allyl aniline with the active sites of WO3/ZrO2 due to the steric hindrance.
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Affiliation(s)
- Yoshihiro Kon
- Interdisciplinary Research Center for Catalytic Chemistry, National Institute of Advanced Industrial Science and Technology (AIST) 1-1-1 Higashi Tsukuba Ibaraki 305-8565 Japan
| | - Shota Tsurumi
- Interdisciplinary Research Center for Catalytic Chemistry, National Institute of Advanced Industrial Science and Technology (AIST) 1-1-1 Higashi Tsukuba Ibaraki 305-8565 Japan
| | - Shunsuke Yamada
- Nanospace Catalysis Unit, Institute of Innovative Research, Tokyo Institute of Technology 4259 Nagatsuta Midori-ku Yokohama 226-8503 Japan
| | - Toshiyuki Yokoi
- Nanospace Catalysis Unit, Institute of Innovative Research, Tokyo Institute of Technology 4259 Nagatsuta Midori-ku Yokohama 226-8503 Japan
| | - Tadahiro Fujitani
- Interdisciplinary Research Center for Catalytic Chemistry, National Institute of Advanced Industrial Science and Technology (AIST) 1-1-1 Higashi Tsukuba Ibaraki 305-8565 Japan
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43
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Wang H, Xu Y, Zhang F, Liu Y, Feng X. Bimetallic Palladium/Cobalt Catalysis for Enantioselective Allylic C-H Alkylation via a Transient Chiral Nucleophile Strategy. Angew Chem Int Ed Engl 2022; 61:e202115715. [PMID: 35040550 DOI: 10.1002/anie.202115715] [Citation(s) in RCA: 17] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/18/2021] [Indexed: 01/08/2023]
Abstract
An asymmetric allylic C-H functionalization has been developed by making use of transient chiral nucleophiles, as well as bimetallic synergistic catalysis with an achiral Pd0 catalyst and a chiral N,N'-dioxide-CoII complex. A variety of β-ketoesters and N-Boc oxindoles coupled with allylbenzenes and aliphatic terminal alkenes were well tolerated, furnishing the desired allylic alkylation products in high yields (up to 99 %) with excellent regioselectivities and enantioselectivities (up to 99 % ee).
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Affiliation(s)
- Hongkai Wang
- Key Laboratory of Chemical Genomics, School of Chemical Biology and Biotechnology, Peking University, Shenzhen Graduate School, Shenzhen, 518055, China.,Shenzhen Bay Laboratory, Shenzhen, 518055, China
| | - Yang Xu
- Shenzhen Bay Laboratory, Shenzhen, 518055, China
| | - Fangqing Zhang
- Key Laboratory of Chemical Genomics, School of Chemical Biology and Biotechnology, Peking University, Shenzhen Graduate School, Shenzhen, 518055, China
| | - Yangbin Liu
- Shenzhen Bay Laboratory, Shenzhen, 518055, China
| | - Xiaoming Feng
- Shenzhen Bay Laboratory, Shenzhen, 518055, China.,Key Laboratory of Green Chemistry & Technology, Ministry of Education, College of Chemistry, Sichuan University, Chengdu, 610064, China
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44
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Zhao J, Jia L, Yuan C, Li L, Hu M, Han F, Hu X. Molecular Iodine‐Catalyzed Sulfonyl‐Activated sp
3
C−N Bond Cleavage for the C3‐Alkylation of 4‐Hydroxycoumarins. ChemistrySelect 2022. [DOI: 10.1002/slct.202103318] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Affiliation(s)
- Jinyu Zhao
- College of Chemistry and Chemical Engineering Qiqihar University Qiqihar 161006 China
| | - Lina Jia
- College of Chemistry and Chemical Engineering Qiqihar University Qiqihar 161006 China
- Heilongjiang Provincial Key Laboratory of Catalytic Synthesis for Fine Chemicals Qiqihar 161006 China
| | - Changping Yuan
- College of Chemistry and Chemical Engineering Qiqihar University Qiqihar 161006 China
| | - Linlin Li
- College of Chemistry and Chemical Engineering Qiqihar University Qiqihar 161006 China
| | - Minggang Hu
- College of Chemistry and Chemical Engineering Qiqihar University Qiqihar 161006 China
| | - Fuzhong Han
- College of Chemistry and Chemical Engineering Qiqihar University Qiqihar 161006 China
- Heilongjiang Provincial Key Laboratory of Catalytic Synthesis for Fine Chemicals Qiqihar 161006 China
| | - Xiangping Hu
- Dalian Institute of Chemical Physics Chinese Academy of Sciences Dalian 116023 China
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45
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Dyadyuk A, Vershinin V, Shalit H, Shalev H, More NY, Pappo D. A Chiral Iron Disulfonate Catalyst for the Enantioselective Synthesis of 2-Amino-2'-hydroxy-1,1'-binaphthyls (NOBINs). J Am Chem Soc 2022; 144:3676-3684. [PMID: 35167756 DOI: 10.1021/jacs.1c13020] [Citation(s) in RCA: 15] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
A novel type of chiral redox disulfonate iron complex for asymmetric catalysis is reported. The [Fe((Ra)-BINSate)]+ (BINSate = 1,1'-binaphthalene-2,2'-disulfonate) complex effectively promotes the enantioselective oxidative cross-coupling between 2-naphthols (1) and 2-aminonaphthalene derivatives (2), affording optically enriched (Ra)-2-amino-2'-hydroxy-1,1'-binaphthyls (NOBINs) with exceptional yields and enantioselective ratios (up to 99% yield and 96:4 er). The [Fe((Ra)-BINSate)]+ catalyst was designed as a chiral version of FeCl3 with multicoordination sites available for binding the two coupling partners 1 and 2 as well as the oxidant. Our structure-selectivity and activity study, which covered most of the important positions in the NOBIN scaffold, revealed the effect of different substitution patterns on the coupling efficiency and stereoselectivity.
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Affiliation(s)
- Alina Dyadyuk
- Department of Chemistry, Ben-Gurion University of the Negev, Beer-Sheva 84105, Israel
| | - Vlada Vershinin
- Department of Chemistry, Ben-Gurion University of the Negev, Beer-Sheva 84105, Israel
| | - Hadas Shalit
- Department of Chemistry, Ben-Gurion University of the Negev, Beer-Sheva 84105, Israel
| | - Hen Shalev
- Department of Chemistry, Ben-Gurion University of the Negev, Beer-Sheva 84105, Israel
| | - Nagnath Yadav More
- Department of Chemistry, Ben-Gurion University of the Negev, Beer-Sheva 84105, Israel
| | - Doron Pappo
- Department of Chemistry, Ben-Gurion University of the Negev, Beer-Sheva 84105, Israel
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46
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Franchino A, Martí À, Echavarren AM. H-Bonded Counterion-Directed Enantioselective Au(I) Catalysis. J Am Chem Soc 2022; 144:3497-3509. [PMID: 35138843 PMCID: PMC8895408 DOI: 10.1021/jacs.1c11978] [Citation(s) in RCA: 22] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
![]()
A new strategy for
enantioselective transition-metal catalysis
is presented, wherein a H-bond donor placed on the ligand of a cationic
complex allows precise positioning of the chiral counteranion responsible
for asymmetric induction. The successful implementation of this paradigm
is demonstrated in 5-exo-dig and 6-endo-dig cyclizations of 1,6-enynes, combining an achiral phosphinourea
Au(I) chloride complex with a BINOL-derived phosphoramidate Ag(I)
salt and thus allowing the first general use of chiral anions in Au(I)-catalyzed
reactions of challenging alkyne substrates. Experiments with modified
complexes and anions, 1H NMR titrations, kinetic data,
and studies of solvent and nonlinear effects substantiate the key
H-bonding interaction at the heart of the catalytic system. This conceptually
novel approach, which lies at the intersection of metal catalysis,
H-bond organocatalysis, and asymmetric counterion-directed catalysis,
provides a blueprint for the development of supramolecularly assembled
chiral ligands for metal complexes.
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Affiliation(s)
- Allegra Franchino
- Institute of Chemical Research of Catalonia (ICIQ), Barcelona Institute of Science and Technology, Av. Països Catalans 16, 43007 Tarragona, Spain
| | - Àlex Martí
- Institute of Chemical Research of Catalonia (ICIQ), Barcelona Institute of Science and Technology, Av. Països Catalans 16, 43007 Tarragona, Spain.,Departament de Química Orgànica i Analítica, Universitat Rovira i Virgili, C/Marcel·lí Domingo s/n, 43007 Tarragona, Spain
| | - Antonio M Echavarren
- Institute of Chemical Research of Catalonia (ICIQ), Barcelona Institute of Science and Technology, Av. Països Catalans 16, 43007 Tarragona, Spain.,Departament de Química Orgànica i Analítica, Universitat Rovira i Virgili, C/Marcel·lí Domingo s/n, 43007 Tarragona, Spain
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47
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Chen DF, Gong LZ. Organo/Transition-Metal Combined Catalysis Rejuvenates Both in Asymmetric Synthesis. J Am Chem Soc 2022; 144:2415-2437. [DOI: 10.1021/jacs.1c11408] [Citation(s) in RCA: 28] [Impact Index Per Article: 14.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Affiliation(s)
- Dian-Feng Chen
- Hefei National Laboratory for Physical Sciences at the Microscale and Department of Chemistry, University of Science and Technology of China, Hefei 230026, China
| | - Liu-Zhu Gong
- Hefei National Laboratory for Physical Sciences at the Microscale and Department of Chemistry, University of Science and Technology of China, Hefei 230026, China
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48
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Wang H, Xu Y, Zhang F, Liu Y, Feng X. Bimetallic Palladium/Cobalt Catalysis for Enantioselective Allylic C−H Alkylation via Transient Chiral Nucleophile Strategy. Angew Chem Int Ed Engl 2022. [DOI: 10.1002/ange.202115715] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Affiliation(s)
- Hongkai Wang
- Peking University Shenzhen Graduate School School of Chemical Biology and Biotechnology CHINA
| | - Yang Xu
- Shenzhen Bay Laboratory Chemical Biology CHINA
| | - Fangqing Zhang
- Peking University Shenzhen Graduate School School of Chemical Biology and Biotechnology CHINA
| | - Yangbin Liu
- Shenzhen Bay Laboratory Chemical Biology CHINA
| | - Xiaoming Feng
- Sichuan University College of Chemistry 29 Wangjiang Road, Jiuyan Bridge 610064 Chengdu CHINA
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49
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Cooperative Catalytic Asymmetric Three-Component Allylic Alkylation Enabled by Ternary Catalyst System. CHINESE J ORG CHEM 2022. [DOI: 10.6023/cjoc202200008] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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50
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Fu Y, Li Y, Luo D, Lu Y, Huang J, Yang Z, Lu J, Jiang YY, Lu JY. Palladium-Catalyzed Regioselective B(3,4)-H Acyloxylation of o-Carboranes. Inorg Chem 2021; 61:911-922. [PMID: 34964616 DOI: 10.1021/acs.inorgchem.1c02758] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
We disclose herein an efficient regioselective B(3,4)-H activation via a ligand strategy, affording B(3)-monoacyloxylated and B(3,4)-diacyloxylated o-carboranes. The identification of amino acid and phosphoric acid ligands is crucial for the success of B(3)-mono- and B(3,4)-diacyloxylation, respectively. This ligand approach is compatible with a broad range of carboxylic acids. The functionalization of complex drug molecules is demonstrated. Other acyloxyl sources, including sodium benzoate, benzoic anhydride, and iodobenzene diacetate, are also tolerated.
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Affiliation(s)
- Yatong Fu
- Key Laboratory of Ministry of Education for Advanced Materials in Tropical Island Resources, School of Science, Hainan University, 58 Renmin Road, Haikou 570228, People's Republic of China
| | - Yu Li
- School of Chemistry and Chemical Engineering, Qufu Normal University, Qufu 273165, People's Republic of China
| | - Donghong Luo
- Key Laboratory of Ministry of Education for Advanced Materials in Tropical Island Resources, School of Science, Hainan University, 58 Renmin Road, Haikou 570228, People's Republic of China
| | - Yibo Lu
- Key Laboratory of Ministry of Education for Advanced Materials in Tropical Island Resources, School of Science, Hainan University, 58 Renmin Road, Haikou 570228, People's Republic of China
| | - Jiajun Huang
- Key Laboratory of Ministry of Education for Advanced Materials in Tropical Island Resources, School of Science, Hainan University, 58 Renmin Road, Haikou 570228, People's Republic of China
| | - Ziyi Yang
- Key Laboratory of Ministry of Education for Advanced Materials in Tropical Island Resources, School of Science, Hainan University, 58 Renmin Road, Haikou 570228, People's Republic of China
| | - Jian Lu
- State Key Laboratory of Fluorine & Nitrogen Chemicals, Xi'an Modern Chemistry Research Institute, Xi'an 710065, People's Republic of China
| | - Yuan-Ye Jiang
- School of Chemistry and Chemical Engineering, Qufu Normal University, Qufu 273165, People's Republic of China
| | - Ju-You Lu
- Key Laboratory of Ministry of Education for Advanced Materials in Tropical Island Resources, School of Science, Hainan University, 58 Renmin Road, Haikou 570228, People's Republic of China
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