1
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Dohoda AF, Rishwain N, Tran YN, Michael FE. α'-Selective Selenium-catalyzed Allylic C-H Amination of Enol Derivatives. Angew Chem Int Ed Engl 2024; 63:e202408333. [PMID: 38977425 DOI: 10.1002/anie.202408333] [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: 05/01/2024] [Revised: 07/02/2024] [Accepted: 07/08/2024] [Indexed: 07/10/2024]
Abstract
A transition metal-free Se-catalyzed C-H amination protocol for α'-amination of enol derivatives has been developed. This reaction can be used to functionalize a wide variety of oxygen- and halogen-substituted alkenes spanning a vast range of nucleophilicities, giving α'-aminated enol derivatives with high regioselectivity. Amination of E/Z mixtures of alkenes proceeds stereoconvergently to give the (Z)-enol derivatives exclusively. Mechanistic studies revealed that the relative reactivity and α'-regioselectivity of these transformations is determined by substantial resonance donation to the heteroatom-bound carbon in the transition state. These products participate in traditional reactions of enol derivatives, allowing for efficient functionalization of both α- and α'-positions from a single enol derivative with high diastereocontrol.
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Affiliation(s)
| | - Nicole Rishwain
- Department of Chemistry, University of, Washington, Box 351700
| | - Y-Nhi Tran
- Department of Chemistry, University of, Washington, Box 351700
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2
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Zhang ZY, Zhang T, Ouyang Y, Lu P, Qiao JX, Yu JQ. Synthesis of chiral α-amino acids via Pd(ii)-catalyzed enantioselective C-H arylation of α-aminoisobutyric acid. Chem Sci 2024:d4sc05378h. [PMID: 39345777 PMCID: PMC11427991 DOI: 10.1039/d4sc05378h] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/11/2024] [Accepted: 09/16/2024] [Indexed: 10/01/2024] Open
Abstract
Non-natural chiral α,α-disubstituted α-amino acids (α,α-AAs) constitute an attractive α-aminoisobutyric acid (Aib) replacement for improving bioavailability of linear peptides as therapeutics due to the ability of these amino acids to induce the peptides to form helical structures. Enantioselective β-C(sp3)-H arylation of Aib could potentially provide a versatile one-step strategy for accessing diverse α,α-AAs, but the installation and removal of external directing groups was found in our previously reported work to reduce the efficiency of this approach. Herein we report a Pd(ii)-catalyzed enantioselective C-H arylation of N-phthalyl-protected Aib enabled by a N-2,6-difluorobenzoyl aminoethyl phenyl thioether (MPAThio) ligand, affording α,α-AAs with up to 72% yield and 98% ee. Use of this newly developed chiral catalyst has also significantly improved enantioselective C(sp3)-H arylation of cyclopropanecarboxylic acids by expanding the substrate scope to heterocyclic coupling partners and increasing enantioselectivity to 99% ee.
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Affiliation(s)
- Zi-Yu Zhang
- Department of Chemistry, The Scripps Research Institute 10550 North Torrey Pines Road, La Jolla California 92037 USA
| | - Tao Zhang
- Department of Chemistry, The Scripps Research Institute 10550 North Torrey Pines Road, La Jolla California 92037 USA
| | - Yuxin Ouyang
- Department of Chemistry, The Scripps Research Institute 10550 North Torrey Pines Road, La Jolla California 92037 USA
| | - Peng Lu
- Department of Chemistry, The Scripps Research Institute 10550 North Torrey Pines Road, La Jolla California 92037 USA
| | - Jennifer X Qiao
- Small Molecule Drug Discovery, Bristol Myers Squibb Research and Early Development Cambridge Massachusetts 02140 USA
| | - Jin-Quan Yu
- Department of Chemistry, The Scripps Research Institute 10550 North Torrey Pines Road, La Jolla California 92037 USA
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3
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Piringer M, Stockhammer L, Vogl L, Weinzierl D, Zebrowski P, Waser M. Enantioselective α-heterofunctionalization reactions of catalytically generated C1-Lewis base enolates. TETRAHEDRON CHEM 2024; 9:100063. [PMID: 38846753 PMCID: PMC7616070 DOI: 10.1016/j.tchem.2024.100063] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Indexed: 06/09/2024]
Abstract
Chiral Lewis base (LB) organocatalysis has emerged as a powerful covalent catalysis concept which allows for highly selective asymmetric C-C and C-heteroatom bond formations. Considering significant recent progress in the development of strategies to access α-heterofunctionalized carboxylic acid derivatives under chiral LB catalysis, we wish to summarize the most significant concepts and advances in this field within this mini review now.
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Affiliation(s)
| | | | | | | | | | - Mario Waser
- Institute of Organic Chemistry, Johannes Kepler University Linz, Altenbergerstr. 69, 4040 Linz, Austria
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4
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Shirisha T, Majhi S, Balasubramanian S, Kashinath D. Metal-free C(sp 3)-H functionalization (C-C and C-N bond formation) of 1,2,3,4-tetrahydroacridines using deep eutectic solvents as catalyst and reaction medium. Org Biomol Chem 2024; 22:1434-1440. [PMID: 38265125 DOI: 10.1039/d3ob01752d] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2024]
Abstract
Herein, we report a metal-free and efficient method for the C(sp3)-H functionalization of 1,2,3,4-tetrahydroacridines at the C4-position by the addition of azodicarboxylates (C-N bond) and maleimides (C-C bond) using deep eutectic solvents (DESs) at 80 °C. The C4-functionalized 1,2,3,4-tetrahydroacridines were achieved with high atom efficiency, precise regioselectivity, and yields ranging from 70-96%. The practicality of the developed method has been demonstrated through gram-scale synthesis. Also the green-metrics were calculated for the developed method and it was found that the metrics are near to the ideal values.
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Affiliation(s)
| | - Subir Majhi
- Department of Chemistry, National Institute of Technology, Warangal-506 004, India.
| | - Sridhar Balasubramanian
- Centre for X-ray Crystallography, Department of Analytical & Structural Chemistry, CSIR-Indian Institute of Chemical Technology, Tarnaka, Uppal Road, Hyderabad-500007, Telangana, India
- Academy of Scientific and Innovative Research (AcSIR), Ghaziabad-201 002, India
| | - Dhurke Kashinath
- Department of Chemistry, National Institute of Technology, Warangal-506 004, India.
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5
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Mondal BD, Gorai S, Nath R, Paul A, Guin J. Enantioselective Amination of 3-Substituted-2-benzofuranones via Non-covalent N-Heterocyclic Carbene Catalysis. Chemistry 2024; 30:e202303115. [PMID: 37997460 DOI: 10.1002/chem.202303115] [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: 09/25/2023] [Revised: 11/21/2023] [Accepted: 11/22/2023] [Indexed: 11/25/2023]
Abstract
Herein, an efficient method for asymmetric α-amination of 2-benzofuranones with N-heterocyclic carbene (NHC) catalysis is reported. The process is based on non-covalent interaction of NHC with substrate, facilitating the formation of a chiral ion-pair that encompasses enolate and azolium salt. The activated enolate adds to an electrophilic amine source with sufficient facial control to furnish an enantioenriched product having an amine substituted quaternary stereocenter. The process displays a broad substrate scope. A preparative scale synthesis has been achieved. Preliminary mechanistic investigations based on experimental and DFT studies suggest a reaction pathway that involves non-covalent substrate/NHC interactions and essentially implicate the role of π-π interaction in diastereomeric transition states for stereo-chemical discrimination.
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Affiliation(s)
- Bhaskar Deb Mondal
- School of Chemical Sciences, Indian Association for the Cultivation of Science, 2 A & 2B Raja S. C. Mullick Road, Jadavpur, Kolkata, 700032, India
| | - Sadhan Gorai
- School of Chemical Sciences, Indian Association for the Cultivation of Science, 2 A & 2B Raja S. C. Mullick Road, Jadavpur, Kolkata, 700032, India
| | - Rounak Nath
- School of Chemical Sciences, Indian Association for the Cultivation of Science, 2 A & 2B Raja S. C. Mullick Road, Jadavpur, Kolkata, 700032, India
| | - Ankan Paul
- School of Chemical Sciences, Indian Association for the Cultivation of Science, 2 A & 2B Raja S. C. Mullick Road, Jadavpur, Kolkata, 700032, India
| | - Joyram Guin
- School of Chemical Sciences, Indian Association for the Cultivation of Science, 2 A & 2B Raja S. C. Mullick Road, Jadavpur, Kolkata, 700032, India
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6
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Li HH, Chen X, Kramer S. Recent developments for intermolecular enantioselective amination of non-acidic C(sp 3)-H bonds. Chem Sci 2023; 14:13278-13289. [PMID: 38033905 PMCID: PMC10686044 DOI: 10.1039/d3sc04643e] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/04/2023] [Accepted: 11/07/2023] [Indexed: 12/02/2023] Open
Abstract
Enantioenriched chiral amines are of exceptional importance in the pharmaceutical industry. Recently, several new methods for the installation of these functional groups directly from non-acidic C(sp3)-H bonds by catalytic intermolecular enantioselective amination have been reported. These methods represent significant advances of the field and most of them display high levels of enantioselectivity, utilize the C(sp3)-H substrate as the limiting reagent, feature good functional group tolerance, and show compatibility with late-stage C(sp3)-H amination of advanced substrates. This perspective provides an overview of the recent developments in this rapidly advancing field and outlines possibilities and limitations, which will help identify unsolved challenges and guide future research efforts.
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Affiliation(s)
- Heng-Hui Li
- Department of Chemistry, Technical University of Denmark 2800 Kgs. Lyngby Denmark
| | - Xuemeng Chen
- Department of Chemistry, Technical University of Denmark 2800 Kgs. Lyngby Denmark
| | - Søren Kramer
- Department of Chemistry, Technical University of Denmark 2800 Kgs. Lyngby Denmark
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7
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Cao R, Liu Y, Shi X, Zheng J. Visible-light induced cross-electrophile coupling of imines and anhydrides to synthesize α-amino ketones. Chem Commun (Camb) 2023; 59:10668-10671. [PMID: 37581330 DOI: 10.1039/d3cc03028h] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 08/16/2023]
Abstract
α-Amino ketones are important motifs in synthetic and medicinal chemistry. Efficient methods to directly access these motifs from feasible precursors are, however, limited. Herein, a visible-light mediated reductive cross-electrophile coupling of readily available imines and anhydrides was developed. Under mild reaction conditions, the umpolung reactivity of diverse imines engaged with anhydrides gives a variety of α-amino ketones with good yields and a broad functional group compatibility. Primary mechanistic studies revealed that this transformation might proceed through a radical-radical cross coupling pathway dominantly.
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Affiliation(s)
- Renxu Cao
- Engineering Research Center of Pharmaceutical Process Chemistry, Ministry of Education, and the School of Pharmacy, East China University of Science and Technology, Shanghai 200237, P. R. China.
| | - Yu Liu
- Engineering Research Center of Pharmaceutical Process Chemistry, Ministry of Education, and the School of Pharmacy, East China University of Science and Technology, Shanghai 200237, P. R. China.
| | - Xiaoxin Shi
- Engineering Research Center of Pharmaceutical Process Chemistry, Ministry of Education, and the School of Pharmacy, East China University of Science and Technology, Shanghai 200237, P. R. China.
| | - Jun Zheng
- Engineering Research Center of Pharmaceutical Process Chemistry, Ministry of Education, and the School of Pharmacy, East China University of Science and Technology, Shanghai 200237, P. R. China.
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8
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Wang Z, Zheng Y, Feng J, Zhang W, Gao Q. Promoting Amination of Furfural to Furfurylamine by Metal-Support Interactions on Pd/MoO 3-x Catalysts. Chemistry 2023; 29:e202300947. [PMID: 37309246 DOI: 10.1002/chem.202300947] [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: 03/25/2023] [Revised: 06/01/2023] [Accepted: 06/12/2023] [Indexed: 06/14/2023]
Abstract
The reductive amination of carbonyl compounds is one of the most straightforward protocols to construct C-N bonds, but highly desires active and selective catalysts. Herein, Pd/MoO3-x catalysts are proposed for furfural amination, in which the interactions between Pd nanoparticles and MoO3-x supports can be easily ameliorated by varying the preparation temperature toward efficient catalytic turnover. Thanks to the synergistic cooperation of MoV -rich MoO3-x and highly dispersed Pd, the optimal catalysts afford the high yield of furfurylamine (84 %) at 80 °C. Thereinto, MoV species not only acts as the acidic promoter to facilitate the activation of carbonyl groups, but also interacts with Pd nanoparticles to promote the subsequent hydrogenolysis of Schiff base N-furfurylidenefurfurylamine and its germinal diamine. The good efficiency of Pd/MoO3-x within a broad substrate scope further highlights the key contribution of metal-support interactions to the refinery of biomass feedstocks.
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Affiliation(s)
- Zhiyuan Wang
- College of Chemistry and Materials Science, Guangdong Provincial Key Laboratory of Functional Supramolecular Coordination Materials and Applications, Jinan University, 510632, Guangzhou, P. R. China
| | - Yinjian Zheng
- College of Chemistry and Materials Science, Guangdong Provincial Key Laboratory of Functional Supramolecular Coordination Materials and Applications, Jinan University, 510632, Guangzhou, P. R. China
| | - Jiye Feng
- College of Chemistry and Materials Science, Guangdong Provincial Key Laboratory of Functional Supramolecular Coordination Materials and Applications, Jinan University, 510632, Guangzhou, P. R. China
| | - Wenbiao Zhang
- College of Chemistry and Materials Science, Guangdong Provincial Key Laboratory of Functional Supramolecular Coordination Materials and Applications, Jinan University, 510632, Guangzhou, P. R. China
| | - Qingsheng Gao
- College of Chemistry and Materials Science, Guangdong Provincial Key Laboratory of Functional Supramolecular Coordination Materials and Applications, Jinan University, 510632, Guangzhou, P. R. China
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9
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Feng M, Fernandes AJ, Sirvent A, Spinozzi E, Shaaban S, Maulide N. Transfer freier Aminogruppen via α-Aminierung von Carbonylen. ANGEWANDTE CHEMIE (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2023; 135:e202304990. [PMID: 38516250 PMCID: PMC10952326 DOI: 10.1002/ange.202304990] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 04/08/2023] [Indexed: 03/23/2024]
Abstract
AbstractEine Strategie zur direkten α‐Aminierung unfunktionalisierter Carbonylverbindungen wird berichtet. Unter Verwendung einer kommerziell verfügbaren Stickstoffquelle zur Übertragung der freien Aminogruppe (NH2) werden primäre α‐Aminocarbonylverbindungen unter besonders milden Bedingungen hergestellt. Die direkte Einführung einer ungeschützten, primären Aminogruppe ermöglicht in der Folge zahlreiche in situ Funktionalisierungen der erhaltenen Reaktionsprodukte, einschließlich Peptidkupplungen und Pictet–Spengler Cyclisierungen.
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Affiliation(s)
- Minghao Feng
- Institut für Organische ChemieUniversität WienWähringer Straße 381090WienÖsterreich
| | - Anthony J. Fernandes
- Institut für Organische ChemieUniversität WienWähringer Straße 381090WienÖsterreich
- Christian-Doppler Labor für Entropieorientiertes Drug DesignJosef-Holaubek-Platz 21090WienÖsterreich
| | - Ana Sirvent
- Institut für Organische ChemieUniversität WienWähringer Straße 381090WienÖsterreich
- Christian-Doppler Labor für Entropieorientiertes Drug DesignJosef-Holaubek-Platz 21090WienÖsterreich
| | - Eleonora Spinozzi
- Institut für Organische ChemieUniversität WienWähringer Straße 381090WienÖsterreich
| | - Saad Shaaban
- Institut für Organische ChemieUniversität WienWähringer Straße 381090WienÖsterreich
| | - Nuno Maulide
- Institut für Organische ChemieUniversität WienWähringer Straße 381090WienÖsterreich
- Christian-Doppler Labor für Entropieorientiertes Drug DesignJosef-Holaubek-Platz 21090WienÖsterreich
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10
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Feng M, Fernandes AJ, Sirvent A, Spinozzi E, Shaaban S, Maulide N. Free Amino Group Transfer via α-Amination of Native Carbonyls. Angew Chem Int Ed Engl 2023; 62:e202304990. [PMID: 37114555 PMCID: PMC10952782 DOI: 10.1002/anie.202304990] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/08/2023] [Revised: 04/26/2023] [Accepted: 04/28/2023] [Indexed: 04/29/2023]
Abstract
We report herein a straightforward transfer of a free amino group (NH2 ) from a commercially available nitrogen source to unfunctionalized, native carbonyls (amides and ketones) resulting in direct α-amination. Primary α-amino carbonyls are readily produced under mild conditions, further enabling diverse in situ functionalization reactions-including peptide coupling and Pictet-Spengler cyclization-that capitalize on the presence of the unprotected primary amine.
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Affiliation(s)
- Minghao Feng
- Institute of Organic ChemistryUniversity of ViennaWähringer Straße 381090ViennaAustria
| | - Anthony J. Fernandes
- Institute of Organic ChemistryUniversity of ViennaWähringer Straße 381090ViennaAustria
- Christian-Doppler Laboratory for Entropy-Oriented Drug DesignJosef-Holaubek-Platz 21090ViennaAustria
| | - Ana Sirvent
- Institute of Organic ChemistryUniversity of ViennaWähringer Straße 381090ViennaAustria
- Christian-Doppler Laboratory for Entropy-Oriented Drug DesignJosef-Holaubek-Platz 21090ViennaAustria
| | - Eleonora Spinozzi
- Institute of Organic ChemistryUniversity of ViennaWähringer Straße 381090ViennaAustria
| | - Saad Shaaban
- Institute of Organic ChemistryUniversity of ViennaWähringer Straße 381090ViennaAustria
| | - Nuno Maulide
- Institute of Organic ChemistryUniversity of ViennaWähringer Straße 381090ViennaAustria
- Christian-Doppler Laboratory for Entropy-Oriented Drug DesignJosef-Holaubek-Platz 21090ViennaAustria
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11
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Makino K, Kumagai Y, Yoshino T, Kojima M, Matsunaga S. Catalytic Enantioselective Amination of Enol Silyl Ethers Using a Chiral Paddle-Wheel Diruthenium Complex. Org Lett 2023; 25:3234-3238. [PMID: 37140361 DOI: 10.1021/acs.orglett.3c00940] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/05/2023]
Abstract
A chiral paddle-wheel dinuclear ruthenium catalyst was applied to a catalytic asymmetric nitrene-transfer reaction with enol silyl ethers. The ruthenium catalyst was applicable to aliphatic enol silyl ethers as well as aryl-containing enol silyl ethers. The substrate scope of the ruthenium catalyst was superior to that of analogous chiral paddle-wheel rhodium catalysts. α-Amino ketones derived from aliphatic substrates were obtained in up to 97% ee with the ruthenium catalyst, while analogous rhodium catalysts resulted in only moderate enantioselectivity.
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Affiliation(s)
- Kotoko Makino
- Faculty of Pharmaceutical Sciences, Hokkaido University, Sapporo 060-0812, Japan
| | - Yuhei Kumagai
- Faculty of Pharmaceutical Sciences, Hokkaido University, Sapporo 060-0812, Japan
| | - Tatsuhiko Yoshino
- Faculty of Pharmaceutical Sciences, Hokkaido University, Sapporo 060-0812, Japan
- Global Station for Biosurfaces and Drug Discovery, Hokkaido University, Sapporo 060-0812, Japan
| | - Masahiro Kojima
- Faculty of Pharmaceutical Sciences, Hokkaido University, Sapporo 060-0812, Japan
| | - Shigeki Matsunaga
- Faculty of Pharmaceutical Sciences, Hokkaido University, Sapporo 060-0812, Japan
- Global Station for Biosurfaces and Drug Discovery, Hokkaido University, Sapporo 060-0812, Japan
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12
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Liu J, Zhang W, Tao X, Wang Q, Wang X, Pan Y, Ma J, Yan L, Wang Y. Photoredox Microfluidic Synthesis of Trifluoromethylated Amino Acids. Org Lett 2023; 25:3083-3088. [PMID: 37087760 DOI: 10.1021/acs.orglett.3c00915] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/25/2023]
Abstract
Fluorinated amino acids are a class of highly valuable building blocks that are widely employed in biological science and pharmaceutical industry for improved stability, activity, and folding property of proteins. However, the synthetic approach has conventionally been constrained by harsh conditions and limited substrate range. We demonstrate a general synthetic protocol for photoinduced α-CF3 amino acids using continuous flow technology that benefits from enhanced fusion and precise control of reaction time, making it potentially useful in large-scale peptide synthesis.
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Affiliation(s)
- Jiyang Liu
- State Key Laboratory of Coordination Chemistry, Jiangsu Key Laboratory of Advanced Organic Materials, Collaborative Innovation Center of Advanced Microstructures, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210023, China
| | - Weigang Zhang
- State Key Laboratory of Coordination Chemistry, Jiangsu Key Laboratory of Advanced Organic Materials, Collaborative Innovation Center of Advanced Microstructures, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210023, China
| | - Xiangzhang Tao
- State Key Laboratory of Coordination Chemistry, Jiangsu Key Laboratory of Advanced Organic Materials, Collaborative Innovation Center of Advanced Microstructures, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210023, China
| | - Qing Wang
- State Key Laboratory of Coordination Chemistry, Jiangsu Key Laboratory of Advanced Organic Materials, Collaborative Innovation Center of Advanced Microstructures, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210023, China
| | - Xiaochen Wang
- State Key Laboratory of Coordination Chemistry, Jiangsu Key Laboratory of Advanced Organic Materials, Collaborative Innovation Center of Advanced Microstructures, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210023, China
| | - Yi Pan
- State Key Laboratory of Coordination Chemistry, Jiangsu Key Laboratory of Advanced Organic Materials, Collaborative Innovation Center of Advanced Microstructures, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210023, China
| | - Jinzhu Ma
- School of Basic Medicine, Wannan Medical College, Wuhu 241000, China
| | - Liang Yan
- State Key Laboratory of Coordination Chemistry, Jiangsu Key Laboratory of Advanced Organic Materials, Collaborative Innovation Center of Advanced Microstructures, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210023, China
- School of Basic Medicine, Wannan Medical College, Wuhu 241000, China
| | - Yi Wang
- State Key Laboratory of Coordination Chemistry, Jiangsu Key Laboratory of Advanced Organic Materials, Collaborative Innovation Center of Advanced Microstructures, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210023, China
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13
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Okumatsu D, Kawanaka K, Kainuma S, Kiyokawa K, Minakata S. α-Amination of Carbonyl Compounds by Using Hypervalent Iodine-Based Aminating Reagents Containing a Transferable (Diarylmethylene)amino Group. Chemistry 2023; 29:e202203722. [PMID: 36604401 DOI: 10.1002/chem.202203722] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/29/2022] [Revised: 01/05/2023] [Accepted: 01/05/2023] [Indexed: 01/07/2023]
Abstract
Hypervalent iodine-based aminating reagents containing a transferable (diarylmethylene)amino group can be used for the α-amination of simple carbonyl compounds such as esters, amides, and ketones in the presence of a lithium base. The (diarylmethylene)amino groups of the products can be readily modified, thus providing access to primary amines and diarylmethylamines. The developed method features transition-metal-free conditions and a simple one-pot procedure without the need to prepare enolate equivalents separately, thus offering a general and practical approach to the synthesis of a wide variety of α-amino carbonyl compounds. Experimental mechanistic investigations indicate that this amination proceeds through a unique radical coupling of an α-carbonyl radical with an iminyl radical; they are generated through a single-electron transfer between a lithium enolate and the hypervalent iodine reagent.
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Affiliation(s)
- Daichi Okumatsu
- Department of Applied Chemistry, Graduate School of Engineering, Osaka University, Yamadaoka 2-1, Suita, Osaka, 565-0871, Japan
| | - Kazuki Kawanaka
- Department of Applied Chemistry, Graduate School of Engineering, Osaka University, Yamadaoka 2-1, Suita, Osaka, 565-0871, Japan
| | - Shunpei Kainuma
- Department of Applied Chemistry, Graduate School of Engineering, Osaka University, Yamadaoka 2-1, Suita, Osaka, 565-0871, Japan
| | - Kensuke Kiyokawa
- Department of Applied Chemistry, Graduate School of Engineering, Osaka University, Yamadaoka 2-1, Suita, Osaka, 565-0871, Japan
| | - Satoshi Minakata
- Department of Applied Chemistry, Graduate School of Engineering, Osaka University, Yamadaoka 2-1, Suita, Osaka, 565-0871, Japan
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14
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Wang S, Zhang C, Li D, Zhou Y, Su Z, Feng X, Dong S. New chiral N-heterocyclic olefin bifunctional organocatalysis in α-functionalization of β-ketoesters. Sci China Chem 2022. [DOI: 10.1007/s11426-022-1458-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
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15
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Liu H, Lau VHM, Xu P, Chan TH, Huang Z. Diverse synthesis of α-tertiary amines and tertiary alcohols via desymmetric reduction of malonic esters. Nat Commun 2022; 13:4759. [PMID: 35963867 PMCID: PMC9376102 DOI: 10.1038/s41467-022-32560-1] [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: 04/11/2022] [Accepted: 08/03/2022] [Indexed: 11/27/2022] Open
Abstract
Amines and alcohols with a fully substituted α-carbon are structures of great value in organic synthesis and drug discovery. While conventional methods towards these motifs often rely on enantioselective carbon-carbon or carbon-heteroatom bond formation reactions, a desymmetric method is developed here by selectively hydrosilylating one of the esters of easily accessible α-substituted α-amino- and -oxymalonic esters. The desymmetrization is enabled by a suite of dinuclear zinc catalysts with pipecolinol-derived tetradentate ligands and can accommodate a diverse panel of heteroatom substituents, including secondary amides, tertiary amines, and ethers of different sizes. The polyfunctionalized reduction products, in return, have provided expeditious approaches to enantioenriched nitrogen- and oxygen-containing molecules, including dipeptides, vitamin analogs, and natural metabolites. Chiral α-tertiary amines and tertiary alcohols are prevalent in bioactive molecules yet challenging targets to access. Here, the authors provide a dinuclear zinc-catalyzed desymmetric approach based on readily available malonic esters.
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Affiliation(s)
- Haichao Liu
- State Key Laboratory of Synthetic Chemistry, Department of Chemistry, The University of Hong Kong, Hong Kong, China
| | - Vincent Ho Man Lau
- State Key Laboratory of Synthetic Chemistry, Department of Chemistry, The University of Hong Kong, Hong Kong, China
| | - Pan Xu
- State Key Laboratory of Synthetic Chemistry, Department of Chemistry, The University of Hong Kong, Hong Kong, China
| | - Tsz Hin Chan
- State Key Laboratory of Synthetic Chemistry, Department of Chemistry, The University of Hong Kong, Hong Kong, China
| | - Zhongxing Huang
- State Key Laboratory of Synthetic Chemistry, Department of Chemistry, The University of Hong Kong, Hong Kong, China.
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16
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García‐Vázquez V, Carretero Cerdán A, Sanz‐Marco A, Gómez‐Bengoa E, Martín‐Matute B. An Expedient Method for the Umpolung Coupling of Enols with Heteronucleophiles**. Chemistry 2022; 28:e202201000. [PMID: 35638139 PMCID: PMC9400875 DOI: 10.1002/chem.202201000] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2022] [Indexed: 11/08/2022]
Abstract
In this paper, we present an unprecedented and general umpolung protocol that allows the functionalization of silyl enol ethers and of 1,3‐dicarbonyl compounds with a large range of heteroatom nucleophiles, including carboxylic acids, alcohols, primary and secondary amines, azide, thiols, and also anionic carbamates derived from CO2. The scope of the reaction also extends to carbon‐based nucleophiles. The reaction relies on the use of 1‐bromo‐3,3‐dimethyl‐1,3‐dihydro‐1λ3[d][1,2]iodaoxole, which provides a key α‐brominated carbonyl intermediate. The reaction mechanism has been studied experimentally and by DFT, and we propose formation of an unusual enolonium intermediate with a halogen‐bonded bromide.
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Affiliation(s)
| | - Alba Carretero Cerdán
- Department of Organic Chemistry Stockholm University Stockholm 10691 Sweden
- Departamento de Química Orgánica I Universidad Pais Vasco, UPV/EHU 20080 Donostia-San Sebastián Spain
| | - Amparo Sanz‐Marco
- Department of Organic Chemistry Stockholm University Stockholm 10691 Sweden
| | - Enrique Gómez‐Bengoa
- Departamento de Química Orgánica I Universidad Pais Vasco, UPV/EHU 20080 Donostia-San Sebastián Spain
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17
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Huang ZY, Yang H, Jiang ZY, Zhou L, Li QH, Zhao ZG. In(OTf)3 catalyzed regioselective acyloin rearrangement of 1-acyl-1-indanols. Tetrahedron Lett 2022. [DOI: 10.1016/j.tetlet.2022.153987] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
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18
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Wu Z, Krishnamurthy S, Satyanarayana Tummalapalli KS, Xu J, Yue C, Antilla JC. Enantioselective Amination of
β
‐Keto Esters Catalyzed by Chiral Calcium Phosphates. Chemistry 2022; 28:e202200907. [DOI: 10.1002/chem.202200907] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/23/2022] [Indexed: 11/10/2022]
Affiliation(s)
- Zhenwei Wu
- School of Pharmaceutical Science and Technology Institute for Molecular Design and Synthesis Tianjin University Tianjin 300072 China
| | - Suvratha Krishnamurthy
- School of Pharmaceutical Science and Technology Institute for Molecular Design and Synthesis Tianjin University Tianjin 300072 China
| | - K. S. Satyanarayana Tummalapalli
- School of Pharmaceutical Science and Technology Institute for Molecular Design and Synthesis Tianjin University Tianjin 300072 China
| | - Jun Xu
- School of Pharmaceutical Science and Technology Institute for Molecular Design and Synthesis Tianjin University Tianjin 300072 China
| | - Caizhen Yue
- School of Science Zhejiang Sci-Tech University Hangzhou City Zhejiang Province 310018 China
| | - Jon C. Antilla
- School of Pharmaceutical Science and Technology Institute for Molecular Design and Synthesis Tianjin University Tianjin 300072 China
- School of Science Zhejiang Sci-Tech University Hangzhou City Zhejiang Province 310018 China
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19
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Yu L, Li W, Tapdara A, Kyne SH, Harode M, Babaahmadi R, Ariafard A, Chan PWH. Chiral Gold Complex Catalyzed Cycloisomerization/Regio- and Enantioselective Nitroso-Diels–Alder Reaction of 1,6-Diyne Esters with Nitrosobenzenes. ACS Catal 2022. [DOI: 10.1021/acscatal.2c01680] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
Affiliation(s)
- Lei Yu
- School of Chemistry, Monash University, Clayton, Victoria 3800, Australia
| | - Wenhai Li
- School of Chemistry, Monash University, Clayton, Victoria 3800, Australia
- Department of Organic Chemistry, China Pharmaceutical University, Nanjing 210009, China
| | - Anyawan Tapdara
- School of Chemistry, Monash University, Clayton, Victoria 3800, Australia
| | - Sara Helen Kyne
- School of Chemistry, Monash University, Clayton, Victoria 3800, Australia
| | - Mandeep Harode
- School of Chemistry, Monash University, Clayton, Victoria 3800, Australia
| | - Rasool Babaahmadi
- School of Natural Sciences−Chemistry, University of Tasmania, Hobart, Tasmania 7001, Australia
| | - Alireza Ariafard
- School of Natural Sciences−Chemistry, University of Tasmania, Hobart, Tasmania 7001, Australia
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20
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Ye CX, Shen X, Chen S, Meggers E. Stereocontrolled 1,3-nitrogen migration to access chiral α-amino acids. Nat Chem 2022; 14:566-573. [PMID: 35379900 PMCID: PMC7612692 DOI: 10.1038/s41557-022-00895-3] [Citation(s) in RCA: 29] [Impact Index Per Article: 14.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/14/2021] [Accepted: 01/19/2022] [Indexed: 11/09/2022]
Abstract
α-Amino acids are essential for life as building blocks of proteins and components of diverse natural molecules. In both industry and academia, the incorporation of unnatural amino acids is often desirable for modulating chemical, physical and pharmaceutical properties. Here we report a protocol for the economical and practical synthesis of optically active α-amino acids based on an unprecedented stereocontrolled 1,3-nitrogen shift. Our method employs abundant and easily accessible carboxylic acids as starting materials, which are first connected to a nitrogenation reagent, followed by a highly regio- and enantioselective ruthenium- or iron-catalysed C(sp3)-H amination. This straightforward method displays a very broad scope, providing rapid access to optically active α-amino acids with aryl, allyl, propargyl and alkyl side chains, and also permits stereocontrolled late-stage amination of carboxylic-acid-containing drugs and natural products.
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Affiliation(s)
- Chen-Xi Ye
- Fachbereich Chemie, Philipps-Universität Marburg, Marburg, Germany
| | - Xiang Shen
- Fachbereich Chemie, Philipps-Universität Marburg, Marburg, Germany
| | - Shuming Chen
- Department of Chemistry and Biochemistry, Oberlin College, Oberlin, OH, USA.
| | - Eric Meggers
- Fachbereich Chemie, Philipps-Universität Marburg, Marburg, Germany.
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21
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Hwang Y, Baek SB, Kim D, Chang S. Chain Walking as a Strategy for Iridium-Catalyzed Migratory Amidation of Alkenyl Alcohols to Access α-Amino Ketones. J Am Chem Soc 2022; 144:4277-4285. [PMID: 35200026 DOI: 10.1021/jacs.2c00948] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Abstract
Catalytic carbon-nitrogen bond formation in hydrocarbons is an appealing synthetic tool to access valuable nitrogen-containing compounds. Although a number of synthetic approaches have been developed to construct a bifunctional α-amino carbonyl scaffold in this realm, installation of an amino functionality at the remote and unfunctionalized aliphatic sites remains underdeveloped. Here we present a tandem iridium catalysis that enables the redox-relay amidation of alkenyl alcohols via chain walking and metal-nitrenoid transfer, which eventually offers a new route to various α-amino ketones with excellent regioselectivity. The virtue of this transformation is that an unrefined isomeric mixture of alkenyl alcohols can be utilized as the readily available starting materials to lead to the regioconvergent amidation. Mechanistic investigations revealed that the reaction proceeds via a tandem process involving two key components of redox-relay chain walking and intermolecular nitrenoid transfer with the assistance of hydrogen bonding, thus representing the competence of Ir catalysis for the olefin migratory C-N coupling with high efficiency and exquisite selectivity.
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Affiliation(s)
- Yeongyu Hwang
- Center for Catalytic Hydrocarbon Functionalizations, Institute for Basic Science (IBS), Daejeon 34141, South Korea.,Department of Chemistry, Korea Advanced Institute of Science and Technology (KAIST), Daejeon 34141, South Korea
| | - Seung Beom Baek
- Center for Catalytic Hydrocarbon Functionalizations, Institute for Basic Science (IBS), Daejeon 34141, South Korea.,Department of Chemistry, Korea Advanced Institute of Science and Technology (KAIST), Daejeon 34141, South Korea
| | - Dongwook Kim
- Center for Catalytic Hydrocarbon Functionalizations, Institute for Basic Science (IBS), Daejeon 34141, South Korea.,Department of Chemistry, Korea Advanced Institute of Science and Technology (KAIST), Daejeon 34141, South Korea
| | - Sukbok Chang
- Center for Catalytic Hydrocarbon Functionalizations, Institute for Basic Science (IBS), Daejeon 34141, South Korea.,Department of Chemistry, Korea Advanced Institute of Science and Technology (KAIST), Daejeon 34141, South Korea
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22
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Zhang JH, Xiao TF, Ji ZQ, Chen HN, Yan PJ, Luo YC, Xu PF, Xu GQ. Organic photoredox catalytic amino-heteroarylation of unactivated olefins to access distal amino ketones. Chem Commun (Camb) 2022; 58:2882-2885. [PMID: 35133366 DOI: 10.1039/d1cc07189k] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
Here we describe a metal-free amino-heteroarylation of unactivated olefins via organic photoredox catalysis, providing a concise and efficient approach for the rapid synthesis of various δ (β, ε)-amino ketones under mild conditions. This protocol demonstrates that the new photocatalyst Cz-NI developed by our group has an excellent photoredox catalytic performance. Finally, a series of mechanistic experiments and DFT calculations indicate that this transformation undergoes a photoredox catalytic sequential radical addition/functional group migration process.
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Affiliation(s)
- Ji-Hua Zhang
- State Key Laboratory of Applied Organic Chemistry, College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou 730000, P. R. China.
| | - Teng-Fei Xiao
- State Key Laboratory of Applied Organic Chemistry, College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou 730000, P. R. China.
| | - Zi-Qin Ji
- State Key Laboratory of Applied Organic Chemistry, College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou 730000, P. R. China.
| | - Han-Nan Chen
- State Key Laboratory of Applied Organic Chemistry, College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou 730000, P. R. China.
| | - Pen-Ji Yan
- Key Laboratory of Hexi Corridor Resources Utilization of Gansu Universities, College of Chemistry and Chemical Engineering, Hexi University, Zhangye 734000, P. R. China
| | - Yong-Chun Luo
- State Key Laboratory of Applied Organic Chemistry, College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou 730000, P. R. China.
| | - Peng-Fei Xu
- State Key Laboratory of Applied Organic Chemistry, College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou 730000, P. R. China. .,State Key Laboratory of Veterinary Etiological Biology, College of Veterinary Medicine, Lanzhou University, Lanzhou 730000, P. R. China
| | - Guo-Qiang Xu
- State Key Laboratory of Applied Organic Chemistry, College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou 730000, P. R. China.
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23
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Gupta E, Vaishanv NK, Kumar S, Purshottam RK, Kant R, Mohanan K. Organocatalytic asymmetric nitroso aldol reaction of α-substituted malonamates. Beilstein J Org Chem 2022; 18:217-224. [PMID: 35280951 PMCID: PMC8895028 DOI: 10.3762/bjoc.18.25] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/12/2021] [Accepted: 02/11/2022] [Indexed: 11/23/2022] Open
Abstract
A practical enantioselective N-selective nitroso aldol reaction of α-methylmalonamates with a nitrosoarene is reported. The reaction employs the Takemoto thiourea catalyst for the induction of enantioselectivity, and the corresponding optically active oxyaminated malonamates were obtained in reasonably good yields.
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Affiliation(s)
- Ekta Gupta
- Medicinal & Process Chemistry Division, CSIR-Central Drug Research Institute, BS-10/1, Sector 10, Jankipuram extension, Sitapur Road, P.O. Box 173, Lucknow 226031, India
| | - Narendra Kumar Vaishanv
- Medicinal & Process Chemistry Division, CSIR-Central Drug Research Institute, BS-10/1, Sector 10, Jankipuram extension, Sitapur Road, P.O. Box 173, Lucknow 226031, India
| | - Sandeep Kumar
- Medicinal & Process Chemistry Division, CSIR-Central Drug Research Institute, BS-10/1, Sector 10, Jankipuram extension, Sitapur Road, P.O. Box 173, Lucknow 226031, India
| | - Raja Krishnan Purshottam
- Sophisticated Analytical Instrument Facility CSIR-Central Drug Research Institute, BS-10/1, Sector 10, Jankipuram extension, Sitapur Road, P.O. Box 173, Lucknow 226031, India
| | - Ruchir Kant
- Molecular and Structural Biology Division, CSIR-Central Drug Research Institute, BS-10/1, Sector 10, Jankipuram extension, Sitapur Road, P.O. Box 173, Lucknow 226031, India
| | - Kishor Mohanan
- Medicinal & Process Chemistry Division, CSIR-Central Drug Research Institute, BS-10/1, Sector 10, Jankipuram extension, Sitapur Road, P.O. Box 173, Lucknow 226031, India
- Academy of Scientific and Innovative Research, Ghaziabad, 201002, India
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24
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Wang X, Zhu B, Liu Y, Wang Q. Combined Photoredox and Carbene Catalysis for the Synthesis of α-Amino Ketones from Carboxylic Acids. ACS Catal 2022. [DOI: 10.1021/acscatal.1c05815] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Affiliation(s)
- Xiaochen Wang
- State Key Laboratory of Elemento-Organic Chemistry, Research Institute of Elemento-Organic Chemistry, College of Chemistry, Frontiers Science Center for New Organic Matter, Nankai University, Tianjin300071, People’s Republic of China
| | - Binbing Zhu
- State Key Laboratory of Elemento-Organic Chemistry, Research Institute of Elemento-Organic Chemistry, College of Chemistry, Frontiers Science Center for New Organic Matter, Nankai University, Tianjin300071, People’s Republic of China
| | - Yuxiu Liu
- State Key Laboratory of Elemento-Organic Chemistry, Research Institute of Elemento-Organic Chemistry, College of Chemistry, Frontiers Science Center for New Organic Matter, Nankai University, Tianjin300071, People’s Republic of China
| | - Qingmin Wang
- State Key Laboratory of Elemento-Organic Chemistry, Research Institute of Elemento-Organic Chemistry, College of Chemistry, Frontiers Science Center for New Organic Matter, Nankai University, Tianjin300071, People’s Republic of China
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25
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Wang D, Zhang W, Lu X, Zhou H, Zhong F. Cinchona Alkaloid Derived Iodide Catalyzed Enantioselective Oxidative α-Amination of Carbonyl Compounds toward the Construction of Spiroindolyloxindole. Org Lett 2022; 24:842-847. [PMID: 35025513 DOI: 10.1021/acs.orglett.1c04118] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
Novel cinchona alkaloid derived iodide catalysts were developed for the enantioselective oxidative α-amination of 2-oxindoles, providing various functionalized spiropyrrolidine oxindoles in high yields and with good enantioselectivities. This iodide/ROOH catalytic system features a one-step synthesis of a catalyst with multiple functionalities, ease of operation, and good scalability, thereby enriching the repertoire of iodide catalysis for enantioselective oxidative coupling reactions.
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Affiliation(s)
- Dangui Wang
- School of Pharmacy, Weifang Medical University, Weifang 261053, People's Republic of China.,Key Laboratory of Material Chemistry for Energy Conversion and Storage, Ministry of Education, Hubei Engineering Research Center for Biomaterials and Medical Protective Materials, Hubei Key Laboratory of Bioinorganic Chemistry & Materia Medica, School of Chemistry and Chemical Engineering, Huazhong University of Science and Technology (HUST), 1037 Luoyu Road, Wuhan 430074, People's Republic of China
| | - Wentao Zhang
- Key Laboratory of Material Chemistry for Energy Conversion and Storage, Ministry of Education, Hubei Engineering Research Center for Biomaterials and Medical Protective Materials, Hubei Key Laboratory of Bioinorganic Chemistry & Materia Medica, School of Chemistry and Chemical Engineering, Huazhong University of Science and Technology (HUST), 1037 Luoyu Road, Wuhan 430074, People's Republic of China
| | - Xunbo Lu
- Key Laboratory of Material Chemistry for Energy Conversion and Storage, Ministry of Education, Hubei Engineering Research Center for Biomaterials and Medical Protective Materials, Hubei Key Laboratory of Bioinorganic Chemistry & Materia Medica, School of Chemistry and Chemical Engineering, Huazhong University of Science and Technology (HUST), 1037 Luoyu Road, Wuhan 430074, People's Republic of China
| | - Hongwei Zhou
- College of Biological, Chemical Science and Engineering, Jiaxing University, 118 Jiahang Road, Jiaxing 314001, People's Republic of China
| | - Fangrui Zhong
- Key Laboratory of Material Chemistry for Energy Conversion and Storage, Ministry of Education, Hubei Engineering Research Center for Biomaterials and Medical Protective Materials, Hubei Key Laboratory of Bioinorganic Chemistry & Materia Medica, School of Chemistry and Chemical Engineering, Huazhong University of Science and Technology (HUST), 1037 Luoyu Road, Wuhan 430074, People's Republic of China
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26
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Shang W, Peng F, Feng Q, Fang F, Pan Z, Ji X, Xia C. Nitrogen-centered radical-mediated α-sulfonimidation of ketones. Org Chem Front 2022. [DOI: 10.1039/d2qo00198e] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A nitrogen-centered radical mediated α-sulfonimidation of carbonyl compounds that was initiated by a benzenesulfonimide radical generated from NFSI under the catalytic reduction of TEMPO is established.
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Affiliation(s)
- Wenbin Shang
- Key Laboratory of Medicinal Chemistry for Natural Resource, Ministry of Education, Yunnan Research & Development Center for Natural Products, School of Chemical Science and Technology, Yunnan University, Kunming 650091, China
- School of Pharmaceutical Sciences and Yunnan Key Laboratory of Pharmacology for Natural Products, Kunming Medical University, Kunming 650500, China
| | - Fengyuan Peng
- Key Laboratory of Medicinal Chemistry for Natural Resource, Ministry of Education, Yunnan Research & Development Center for Natural Products, School of Chemical Science and Technology, Yunnan University, Kunming 650091, China
| | - Qianlang Feng
- Key Laboratory of Medicinal Chemistry for Natural Resource, Ministry of Education, Yunnan Research & Development Center for Natural Products, School of Chemical Science and Technology, Yunnan University, Kunming 650091, China
| | - Fei Fang
- Key Laboratory of Medicinal Chemistry for Natural Resource, Ministry of Education, Yunnan Research & Development Center for Natural Products, School of Chemical Science and Technology, Yunnan University, Kunming 650091, China
| | - Zhiqiang Pan
- Key Laboratory of Medicinal Chemistry for Natural Resource, Ministry of Education, Yunnan Research & Development Center for Natural Products, School of Chemical Science and Technology, Yunnan University, Kunming 650091, China
| | - Xu Ji
- Key Laboratory of Medicinal Chemistry for Natural Resource, Ministry of Education, Yunnan Research & Development Center for Natural Products, School of Chemical Science and Technology, Yunnan University, Kunming 650091, China
| | - Chengfeng Xia
- Key Laboratory of Medicinal Chemistry for Natural Resource, Ministry of Education, Yunnan Research & Development Center for Natural Products, School of Chemical Science and Technology, Yunnan University, Kunming 650091, China
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27
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Henry Blackwell J, Harris GR, Smith MA, Gaunt MJ. Modular Photocatalytic Synthesis of α-Trialkyl-α-Tertiary Amines. J Am Chem Soc 2021; 143:15946-15959. [PMID: 34551248 DOI: 10.1021/jacs.1c07402] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
Molecules displaying an α-trialkyl-α-tertiary amine motif provide access to an important and versatile area of biologically relevant chemical space but are challenging to access through existing synthetic methods. Here, we report an operationally straightforward, multicomponent protocol for the synthesis of a range of functionally and structurally diverse α-trialkyl-α-tertiary amines, which makes use of three readily available components: dialkyl ketones, benzylamines, and alkenes. The strategy relies on the of use visible-light-mediated photocatalysis with readily available Ir(III) complexes to bring about single-electron reduction of an all-alkyl ketimine species to an α-amino radical intermediate; the α-amino radical undergoes Giese-type addition with a variety of alkenes to forge the α-trialkyl-α-tertiary amine center. The mechanism of this process is believed to proceed through an overall redox neutral pathway that involves photocatalytic redox-relay of the imine, generated from the starting amine-ketone condensation, through to an imine-derived product. This is possible because the presence of a benzylic amine component in the intermediate scaffold drives a 1,5-hydrogen atom transfer step after the Giese addition to form a stable benzylic α-amino radical, which is able to close the photocatalytic cycle. These studies detail the evolution of the reaction platform, an extensive investigation of the substrate scope, and preliminary investigation of some of the mechanistic features of this distinct photocatalytic process. We believe this transformation will provide convenient access to previously unexplored α-trialkyl-α-tertiary amine scaffolds that should be of considerable interest to practitioners of synthetic and medicinal chemistry in academic and industrial institutions.
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Affiliation(s)
- J Henry Blackwell
- Yusuf Hamied Department of Chemistry, University of Cambridge, Lensfield Road, Cambridge CB2 1EW, United Kingdom
| | - Georgia R Harris
- Yusuf Hamied Department of Chemistry, University of Cambridge, Lensfield Road, Cambridge CB2 1EW, United Kingdom
| | - Milo A Smith
- Yusuf Hamied Department of Chemistry, University of Cambridge, Lensfield Road, Cambridge CB2 1EW, United Kingdom
| | - Matthew J Gaunt
- Yusuf Hamied Department of Chemistry, University of Cambridge, Lensfield Road, Cambridge CB2 1EW, United Kingdom
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28
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Rezayee NM, Rusbjerg M, Marx M, Linde ST, Jørgensen KA. Metal-free, Oxidative α-Coupling of Aldehydes with Amine Nucleophiles for the Preparation of Congested C(sp 3)-N Bonds. J Org Chem 2021; 87:1756-1766. [PMID: 34610236 DOI: 10.1021/acs.joc.1c01937] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
This article discloses the direct α-amination of α-branched aldehydes applying nitrogen-based nucleophiles. Under organocatalyzed, oxidative conditions α-branched aldehydes are umpoled to their electrophilic synthons and, subsequently, displaced by a variety of nucleophilic amines to form tetrasubstituted tertiary centers. A similar strategy has been previously employed to form congested C-C, C-O, and C-S bonds; however, unsatisfactory results were received when extending the methodology to include C-N bonds. Initially, intramolecular α-amination reactions were undertaken to foster dihydroquinoxaline-type products. A solvent exchange to the polar, aprotic solvent, MeNO2, proved critical to facilitate intermolecular α-C-N bond formation with a wide range of amine coupling partners (N-heterocycles, N,N-diaryl amines, and anilines). Application of the solvent exchange to the enantioselective SN2-DKR manifold provided distinct regimes leading to refinement in yield and enantioselectivity.
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Affiliation(s)
- Nomaan M Rezayee
- Department of Chemistry, Aarhus University, DK-8000 Aarhus C, Denmark
| | - Matilde Rusbjerg
- Department of Chemistry, Aarhus University, DK-8000 Aarhus C, Denmark
| | - Maximilian Marx
- Department of Chemistry, Aarhus University, DK-8000 Aarhus C, Denmark
| | - Sif T Linde
- Department of Chemistry, Aarhus University, DK-8000 Aarhus C, Denmark
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29
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Zhao H, Hu B, Xu L, Walsh PJ. Palladium-catalyzed benzylic C(sp 3)-H carbonylative arylation of azaarylmethyl amines with aryl bromides. Chem Sci 2021; 12:10862-10870. [PMID: 34476065 PMCID: PMC8372623 DOI: 10.1039/d1sc02078a] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/14/2021] [Accepted: 07/06/2021] [Indexed: 01/08/2023] Open
Abstract
A highly selective palladium-catalyzed carbonylative arylation of weakly acidic benzylic C(sp3)-H bonds of azaarylmethylamines with aryl bromides under 1 atm of CO gas has been achieved. This work represents the first examples of use of such weakly acidic pronucleophiles in this class of transformations. In the presence of a NIXANTPHOS-based palladium catalyst, this one-pot cascade process allows a range of azaarylmethylamines containing pyridyl, quinolinyl and pyrimidyl moieties and acyclic and cyclic amines to undergo efficient reactions with aryl bromides and CO to provide α-amino aryl-azaarylmethyl ketones in moderate to high yields with a broad substrate scope and good tolerance of functional groups. This reaction proceeds via in situ reversible deprotonation of the benzylic C-H bonds to give the active carbanions, thereby avoiding prefunctionalized organometallic reagents and generation of additional waste. Importantly, the operational simplicity, scalability and diversity of the products highlight the potential applicability of this protocol.
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Affiliation(s)
- Haoqiang Zhao
- Roy and Diana Vagelos Laboratories, Penn/Merck Laboratory for High-Throughput Experimentation, Department of Chemistry, University of Pennsylvania 231 South 34th Street Philadelphia Pennsylvania 19104-6323 USA
- Department of Chemistry, Renmin University of China Beijing 100872 China
| | - Bowen Hu
- Roy and Diana Vagelos Laboratories, Penn/Merck Laboratory for High-Throughput Experimentation, Department of Chemistry, University of Pennsylvania 231 South 34th Street Philadelphia Pennsylvania 19104-6323 USA
| | - Lijin Xu
- Department of Chemistry, Renmin University of China Beijing 100872 China
| | - Patrick J Walsh
- Roy and Diana Vagelos Laboratories, Penn/Merck Laboratory for High-Throughput Experimentation, Department of Chemistry, University of Pennsylvania 231 South 34th Street Philadelphia Pennsylvania 19104-6323 USA
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30
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Rahmati M, Ghafuri H. Catalytic Strecker reaction: g-C3N4-anchored sulfonic acid organocatalyst for the synthesis of α-aminonitriles. RESEARCH ON CHEMICAL INTERMEDIATES 2021. [DOI: 10.1007/s11164-020-04370-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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31
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Xu GQ, Xiao TF, Feng GX, Liu C, Zhang B, Xu PF. Metal-Free α-C(sp3)–H Aroylation of Amines via a Photoredox Catalytic Radical–Radical Cross-Coupling Process. Org Lett 2021; 23:2846-2852. [DOI: 10.1021/acs.orglett.1c00226] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Affiliation(s)
- Guo-Qiang Xu
- State Key Laboratory of Applied Organic Chemistry, College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou 730000, P. R. China
| | - Teng-Fei Xiao
- State Key Laboratory of Applied Organic Chemistry, College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou 730000, P. R. China
| | - Guo-Xuan Feng
- State Key Laboratory of Applied Organic Chemistry, College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou 730000, P. R. China
| | - Chen Liu
- State Key Laboratory of Applied Organic Chemistry, College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou 730000, P. R. China
| | - Baoxin Zhang
- State Key Laboratory of Applied Organic Chemistry, College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou 730000, P. R. China
| | - Peng-Fei Xu
- State Key Laboratory of Applied Organic Chemistry, College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou 730000, P. R. China
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32
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Organocatalytic Amination of Pyrazolones with Azodicarboxylates: Scope and Limitations. European J Org Chem 2021. [DOI: 10.1002/ejoc.202100167] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
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33
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Zhou Y, Ping Y, Xu Z, Che C. Iron(III)‐BPsalan Complex Catalyzed Highly Enantioselective Dearomative Chlorination of 2‐Hydroxy‐1‐naphthoates. ASIAN J ORG CHEM 2021. [DOI: 10.1002/ajoc.202100002] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Yi‐Ming Zhou
- Shanghai-Hong Kong Joint Laboratory in Chemical Synthesis Shanghai Institute of Organic Chemistry 345 Fenglin Road Shanghai P. R. China
- The Education Ministry Key Lab of Resource Chemistry and Shanghai Key Laboratory of Rare Earth Functional Materials Shanghai Normal University Shanghai 200234 P. R. China
| | - Yuan‐Ji Ping
- Shanghai-Hong Kong Joint Laboratory in Chemical Synthesis Shanghai Institute of Organic Chemistry 345 Fenglin Road Shanghai P. R. China
| | - Zhen‐Jiang Xu
- Shanghai-Hong Kong Joint Laboratory in Chemical Synthesis Shanghai Institute of Organic Chemistry 345 Fenglin Road Shanghai P. R. China
| | - Chi‐Ming Che
- Shanghai-Hong Kong Joint Laboratory in Chemical Synthesis Shanghai Institute of Organic Chemistry 345 Fenglin Road Shanghai P. R. China
- State Key Laboratory of Synthetic Chemistry Department of Chemistry The University of Hong Kong Pokfulam Road Hong Kong SAR P. R. China
- HKU Shenzhen Institute of Research and Innovation Shenzhen Guangdong 518057 P. R. China
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34
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Allen LAT, Raclea RC, Natho P, Parsons PJ. Recent advances in the synthesis of α-amino ketones. Org Biomol Chem 2021; 19:498-513. [PMID: 33325975 DOI: 10.1039/d0ob02098b] [Citation(s) in RCA: 31] [Impact Index Per Article: 10.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Abstract
Due to the importance of the amino ketone motif in synthetic and medicinal chemistry, the number of protocols developed in recent years has considerably increased. This review serves to collate and critically evaluate novel methodologies published since 2011 towards this high value synthon. The chapters are divided by the requisite functionality in the starting material, and an emphasis is placed on discussing functional group compatibility and resultant product substitution patterns. Throughout, applications to medicinal targets are highlighted and mechanistic details are presented, and we further provide a short outlook for future development and emerging potential within this area.
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Affiliation(s)
- Lewis A T Allen
- Department of Chemistry, Imperial College London, Molecular Sciences Research Hub, W12 0BZ, London, UK.
| | - Robert-Cristian Raclea
- Massachusetts Institute of Technology, Department of Chemistry, 77, Massachusetts Avenue, Cambridge, MA 02139-4307, USA
| | - Philipp Natho
- Department of Chemistry, Imperial College London, Molecular Sciences Research Hub, W12 0BZ, London, UK.
| | - Philip J Parsons
- Department of Chemistry, Imperial College London, Molecular Sciences Research Hub, W12 0BZ, London, UK.
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35
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Cheng N, Cui SQ, Ma QQ, Wei ZL, Liao WW. α-Iminol Rearrangement Triggered by Pd-Catalyzed C-H Addition to Nitriles Sequences: Synthesis of Functionalized α-Amino Cyclopentanones. Org Lett 2021; 23:1021-1025. [PMID: 33496596 DOI: 10.1021/acs.orglett.0c04214] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
Abstract
A α-iminol rearrangement triggered by Pd-catalyzed C-H addition of electronic-rich heteroarenes to cyclobutanone-derived O-acyl cyanohydrins was described, which provided a practical and efficient protocol for the preparation of functionalized α-amino cyclopentanones in an atom- and step-economic fashion. In addition, further synthetic transformations of products have also been demonstrated.
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Affiliation(s)
- Na Cheng
- Department of Organic Chemistry, College of Chemistry, Jilin University, 2699 Qianjin Street, Changchun 130012, P.R. China
| | - Shu-Qiang Cui
- Department of Organic Chemistry, College of Chemistry, Jilin University, 2699 Qianjin Street, Changchun 130012, P.R. China
| | - Qian-Qian Ma
- Department of Organic Chemistry, College of Chemistry, Jilin University, 2699 Qianjin Street, Changchun 130012, P.R. China
| | - Zhong-Lin Wei
- Department of Organic Chemistry, College of Chemistry, Jilin University, 2699 Qianjin Street, Changchun 130012, P.R. China
| | - Wei-Wei Liao
- Department of Organic Chemistry, College of Chemistry, Jilin University, 2699 Qianjin Street, Changchun 130012, P.R. China.,State Key Laboratory of Organometallic Chemistry, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, Shanghai 200032, P.R. China
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36
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Blackwell JH, Kumar R, Gaunt MJ. Visible-Light-Mediated Carbonyl Alkylative Amination to All-Alkyl α-Tertiary Amino Acid Derivatives. J Am Chem Soc 2021; 143:1598-1609. [PMID: 33428383 DOI: 10.1021/jacs.0c12162] [Citation(s) in RCA: 37] [Impact Index Per Article: 12.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
The all-alkyl α-tertiary amino acid scaffold represents an important structural feature in many biologically and pharmaceutically relevant molecules. Syntheses of this class of molecule, however, often involve multiple steps and require activating auxiliary groups on the nitrogen atom or tailored building blocks. Here, we report a straightforward, single-step, and modular methodology for the synthesis of all-alkyl α-tertiary amino esters. This new strategy uses visible light and a silane reductant to bring about a carbonyl alkylative amination reaction that combines a wide range of primary amines, α-ketoesters, and alkyl iodides to form functionally diverse all-alkyl α-tertiary amino esters. Brønsted acid-mediated in situ condensation of primary amine and α-ketoester delivers the corresponding ketiminium species, which undergoes rapid 1,2-addition of an alkyl radical (generated from an alkyl iodide by the action of visible light and silane reductant) to form an aminium radical cation. Upon a polarity-matched and irreversible hydrogen atom transfer from electron rich silane, the electrophilic aminium radical cation is converted to an all-alkyl α-tertiary amino ester product. The benign nature of this process allows for broad scope in all three components and generates structurally and functionally diverse suite of α-tertiary amino esters that will likely have widespread use in academic and industrial settings.
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Affiliation(s)
- J Henry Blackwell
- Department of Chemistry, University of Cambridge, Lensfield Road, Cambridge CB2 1EW, United Kingdom
| | - Roopender Kumar
- Department of Chemistry, University of Cambridge, Lensfield Road, Cambridge CB2 1EW, United Kingdom
| | - Matthew J Gaunt
- Department of Chemistry, University of Cambridge, Lensfield Road, Cambridge CB2 1EW, United Kingdom
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37
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He F, Wang J, Zhou F, Tao H, Yang X. Regio- and enantioselective amination of acyclic branched α-alkynyl ketones: asymmetric construction of N-containing quaternary stereocenters. Org Chem Front 2021. [DOI: 10.1039/d1qo00720c] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Abstract
Direct regio- and enantioselective amination of acyclic α-branched ketones enabled by the α-alkynyl group.
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Affiliation(s)
- Faqian He
- School of Physical Science and Technology, ShanghaiTech University, Shanghai 201210, China
- University of Chinese Academy of Sciences, Beijing 100049, China
- Shanghai Institute of Organic Chemistry, Shanghai 200032, China
| | - Jiawen Wang
- School of Physical Science and Technology, ShanghaiTech University, Shanghai 201210, China
| | - Fang Zhou
- iHuman Institute, ShanghaiTech University, Shanghai 201210, China
| | - Houchao Tao
- iHuman Institute, ShanghaiTech University, Shanghai 201210, China
| | - Xiaoyu Yang
- School of Physical Science and Technology, ShanghaiTech University, Shanghai 201210, China
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38
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Varlet T, Masson G. Enamides and dienamides in phosphoric acid-catalysed enantioselective cycloadditions for the synthesis of chiral amines. Chem Commun (Camb) 2021; 57:4089-4105. [DOI: 10.1039/d1cc00590a] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Abstract
This feature article describes how enamides and dienamides can participate in chiral phosphoric acid catalyzed enantioselective cycloadditions to prepare a wide range of cyclic amines.
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Affiliation(s)
- Thomas Varlet
- Université Paris-Saclay
- Institut de Chimie des Substances Naturelles
- ICSN-CNRS UPR 2301
- 91198 Gif-sur-Yvette
- France
| | - Géraldine Masson
- Université Paris-Saclay
- Institut de Chimie des Substances Naturelles
- ICSN-CNRS UPR 2301
- 91198 Gif-sur-Yvette
- France
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39
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Fu X, Hao Y, Bai HY, Duan A, Zhang SY. Co-Catalyzed Direct Regio- and Enantioselective Intermolecular γ-Amination of N-Acylpyrazoles. Org Lett 2020; 23:25-30. [DOI: 10.1021/acs.orglett.0c03522] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Affiliation(s)
- Xin Fu
- Key Laboratory for Thin Film and Microfabrication Technology of Ministry of Education, School of Chemistry and Chemical Engineering, and Shanghai Key Laboratory for Molecular Engineering of Chiral Drugs, Shanghai Jiao Tong University, Shanghai 200240, China
- College of Environmental Science & Technology, Hunan University, Changsha 410082, China
| | - Yu Hao
- Key Laboratory for Thin Film and Microfabrication Technology of Ministry of Education, School of Chemistry and Chemical Engineering, and Shanghai Key Laboratory for Molecular Engineering of Chiral Drugs, Shanghai Jiao Tong University, Shanghai 200240, China
| | - He-Yuan Bai
- Key Laboratory for Thin Film and Microfabrication Technology of Ministry of Education, School of Chemistry and Chemical Engineering, and Shanghai Key Laboratory for Molecular Engineering of Chiral Drugs, Shanghai Jiao Tong University, Shanghai 200240, China
| | - Abing Duan
- College of Environmental Science & Technology, Hunan University, Changsha 410082, China
| | - Shu-Yu Zhang
- Key Laboratory for Thin Film and Microfabrication Technology of Ministry of Education, School of Chemistry and Chemical Engineering, and Shanghai Key Laboratory for Molecular Engineering of Chiral Drugs, Shanghai Jiao Tong University, Shanghai 200240, China
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40
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Kumar J, Suresh E, Bhadra S. Catalytic Direct α-Amination of Arylacetic Acid Synthons with Anilines. J Org Chem 2020; 85:13363-13374. [PMID: 32998508 DOI: 10.1021/acs.joc.0c02122] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
A unique α-amination approach using various anilines has been developed for arylacetic acids via adaptation as benzazoles. The reaction proceeds through a single electron transfer mechanism utilizing an iron-based catalyst system to access α-(N-arylamino)acetic acid equivalents. Modification of approved drugs, facile cleavage of the benzazole auxiliary, and tolerance of amide linkage forming conditions constitute the potential applicability of this strategy.
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Affiliation(s)
- Jogendra Kumar
- Academy of Scientific and Innovative Research (AcSIR), Ghaziabad 201002, India
| | - Eringathodi Suresh
- 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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41
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Eder I, Haider V, Zebrowski P, Waser M. Recent Progress in the Asymmetric Syntheses of α‐Heterofunctionalized (Masked) α‐ and β‐Amino Acid Derivatives. European J Org Chem 2020. [DOI: 10.1002/ejoc.202001077] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Affiliation(s)
- Isabella Eder
- Institute of Organic Chemistry Johannes Kepler University Linz Altenbergerstr. 69 4040 Linz Austria
| | - Victoria Haider
- Institute of Organic Chemistry Johannes Kepler University Linz Altenbergerstr. 69 4040 Linz Austria
| | - Paul Zebrowski
- Institute of Organic Chemistry Johannes Kepler University Linz Altenbergerstr. 69 4040 Linz Austria
| | - Mario Waser
- Institute of Organic Chemistry Johannes Kepler University Linz Altenbergerstr. 69 4040 Linz Austria
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42
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Lin X, Fang F, Lin W, Liu Z, Chang X, Li P, Li W. Organocatalytic Enantioselective α‐Amination by Conjugate Addition of 5
H
‐Thiazol‐4‐ones to Arylazocarboxylates: Access to Chiral
N
,
S
‐acetals. ASIAN J ORG CHEM 2020. [DOI: 10.1002/ajoc.202000355] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Affiliation(s)
- Xiao Lin
- Department of Medicinal ChemistrySchool of PharmacyQingdao University Qingdao Shandong 266021 China
| | - Fang Fang
- Department of ChemistryCollege of ScienceSouthern University of Science and Technology (SUSTech) Shenzhen Guangdong 518055 China
| | - Wei Lin
- Department of Medicinal ChemistrySchool of PharmacyQingdao University Qingdao Shandong 266021 China
| | - Zhantao Liu
- Department of Medicinal ChemistrySchool of PharmacyQingdao University Qingdao Shandong 266021 China
| | - Xiaoyong Chang
- Department of ChemistryCollege of ScienceSouthern University of Science and Technology (SUSTech) Shenzhen Guangdong 518055 China
| | - Pengfei Li
- Department of ChemistryCollege of ScienceSouthern University of Science and Technology (SUSTech) Shenzhen Guangdong 518055 China
- Guangdong Provincial Key Laboratory of CatalysisSouthern University of Science and Technology (SUSTech) Shenzhen Guangdong 518055 China
| | - Wenjun Li
- Department of Medicinal ChemistrySchool of PharmacyQingdao University Qingdao Shandong 266021 China
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43
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Lee M, Jung H, Kim D, Park JW, Chang S. Modular Tuning of Electrophilic Reactivity of Iridium Nitrenoids for the Intermolecular Selective α-Amidation of β-Keto Esters. J Am Chem Soc 2020; 142:11999-12004. [DOI: 10.1021/jacs.0c04344] [Citation(s) in RCA: 22] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Affiliation(s)
- Minhan Lee
- Department of Chemistry, Korea Advanced Institute of Science and Technology (KAIST), Daejeon 34141, Korea
- Center for Catalytic Hydrocarbon Functionalization, Institute for Basic Science (IBS), Daejeon 34141, Korea
| | - Hoimin Jung
- Department of Chemistry, Korea Advanced Institute of Science and Technology (KAIST), Daejeon 34141, Korea
- Center for Catalytic Hydrocarbon Functionalization, Institute for Basic Science (IBS), Daejeon 34141, Korea
| | - Dongwook Kim
- Department of Chemistry, Korea Advanced Institute of Science and Technology (KAIST), Daejeon 34141, Korea
- Center for Catalytic Hydrocarbon Functionalization, Institute for Basic Science (IBS), Daejeon 34141, Korea
| | - Jung-Woo Park
- Department of Chemistry, Korea Advanced Institute of Science and Technology (KAIST), Daejeon 34141, Korea
- Center for Catalytic Hydrocarbon Functionalization, Institute for Basic Science (IBS), Daejeon 34141, Korea
| | - Sukbok Chang
- Department of Chemistry, Korea Advanced Institute of Science and Technology (KAIST), Daejeon 34141, Korea
- Center for Catalytic Hydrocarbon Functionalization, Institute for Basic Science (IBS), Daejeon 34141, Korea
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44
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Raclea RC, Natho P, Allen LAT, White AJP, Parsons PJ. Oxidative Deconstruction of Azetidinols to α-Amino Ketones. J Org Chem 2020; 85:9375-9385. [PMID: 32543189 DOI: 10.1021/acs.joc.0c00986] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
A silver-mediated synthesis of α-amino ketones via the oxidative deconstruction of azetidinols has been developed using a readily scalable protocol with isolated yields up to 80%. The azetidinols are easily synthesized in one step and can act as protecting groups for these pharmaceutically relevant synthons. Furthermore, mechanistic insights are presented and these data have revealed that the transformation is likely to proceed through the β-scission of an alkoxy radical, followed by oxidation and C-N cleavage of the resulting α-amido radical.
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Affiliation(s)
- Robert-Cristian Raclea
- Department of Chemistry, Imperial College London, Molecular Sciences Research Hub, W12 0BZ, London, U.K
| | - Philipp Natho
- Department of Chemistry, Imperial College London, Molecular Sciences Research Hub, W12 0BZ, London, U.K
| | - Lewis A T Allen
- Department of Chemistry, Imperial College London, Molecular Sciences Research Hub, W12 0BZ, London, U.K
| | - Andrew J P White
- Department of Chemistry, Imperial College London, Molecular Sciences Research Hub, W12 0BZ, London, U.K
| | - Philip J Parsons
- Department of Chemistry, Imperial College London, Molecular Sciences Research Hub, W12 0BZ, London, U.K
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45
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Dai L, Li X, Zeng Z, Dong S, Zhou Y, Liu X, Feng X. Catalytic Asymmetric Acyloin Rearrangements of α-Ketols, α-Hydroxy Aldehydes, and α-Iminols by N, N'-Dioxide-Metal Complexes. Org Lett 2020; 22:5041-5045. [PMID: 32610927 DOI: 10.1021/acs.orglett.0c01626] [Citation(s) in RCA: 17] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
Abstract
A highly enantioselective acyloin rearrangement of cyclic α-ketols has been developed with a chiral Al(III)-N,N'-dioxide complex as catalyst. This strategy provided an array of optically active 2-acyl-2-hydroxy cyclohexanones in moderate to good yields with high enantioselectivities. The asymmetric isomerizations of acyclic α-hydroxy aldehydes and α-iminols were achieved as well under modified conditions, affording the corresponding chiral α-hydroxy ketones and α-amino ketones in moderate results. Moreover, further transformations of product to enantioenriched diols were carried out.
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Affiliation(s)
- Li Dai
- Key Laboratory of Green Chemistry &Technology, Ministry of Education, College of Chemistry, Sichuan University, Chengdu 610064, China
| | - Xiangqiang Li
- Key Laboratory of Green Chemistry &Technology, Ministry of Education, College of Chemistry, Sichuan University, Chengdu 610064, China
| | - Zi Zeng
- Key Laboratory of Green Chemistry &Technology, Ministry of Education, College of Chemistry, Sichuan University, Chengdu 610064, China
| | - Shunxi Dong
- Key Laboratory of Green Chemistry &Technology, Ministry of Education, College of Chemistry, Sichuan University, Chengdu 610064, China
| | - Yuqiao Zhou
- Key Laboratory of Green Chemistry &Technology, Ministry of Education, College of Chemistry, Sichuan University, Chengdu 610064, China
| | - Xiaohua Liu
- Key Laboratory of Green Chemistry &Technology, Ministry of Education, College of Chemistry, Sichuan University, Chengdu 610064, China
| | - Xiaoming Feng
- Key Laboratory of Green Chemistry &Technology, Ministry of Education, College of Chemistry, Sichuan University, Chengdu 610064, China
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46
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Tanaka T, Yazaki R, Ohshima T. Chemoselective Catalytic α-Oxidation of Carboxylic Acids: Iron/Alkali Metal Cooperative Redox Active Catalysis. J Am Chem Soc 2020; 142:4517-4524. [DOI: 10.1021/jacs.0c00727] [Citation(s) in RCA: 21] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Affiliation(s)
- Tsukushi Tanaka
- Graduate School of Pharmaceutical Sciences, Kyushu University, Maidashi, Higashi-ku, Fukuoka 812-8582, Japan
| | - Ryo Yazaki
- Graduate School of Pharmaceutical Sciences, Kyushu University, Maidashi, Higashi-ku, Fukuoka 812-8582, Japan
| | - Takashi Ohshima
- Graduate School of Pharmaceutical Sciences, Kyushu University, Maidashi, Higashi-ku, Fukuoka 812-8582, Japan
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47
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Liu J, Vasamsetty L, Anwar M, Yang S, Xu W, Liu J, Nagaraju S, Fang X. Organocatalyzed Kinetic Resolution of α-Functionalized Ketones: The Malonate Unit Leads the Way. ACS Catal 2020. [DOI: 10.1021/acscatal.9b05608] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
Affiliation(s)
- Jian Liu
- State Key Laboratory of Structural Chemistry, University of Chinese Academy of Sciences, Fuzhou 350100, China
| | - Laxmaiah Vasamsetty
- State Key Laboratory of Structural Chemistry, University of Chinese Academy of Sciences, Fuzhou 350100, China
| | - Muhammad Anwar
- State Key Laboratory of Structural Chemistry, University of Chinese Academy of Sciences, Fuzhou 350100, China
| | - Shuang Yang
- State Key Laboratory of Structural Chemistry, University of Chinese Academy of Sciences, Fuzhou 350100, China
- Key Laboratory of Synthetic Chemistry of Natural Substances, Shanghai Institute of Organic Chemistry, Shanghai 200032, China
| | - Weici Xu
- State Key Laboratory of Structural Chemistry, University of Chinese Academy of Sciences, Fuzhou 350100, China
| | - Jinggong Liu
- Orthopedics Department, Guangdong Provincial Hospital of Traditional Chinese Medicine, No. 111 Dade Road, Guangzhou 510120, China
| | - Sakkani Nagaraju
- State Key Laboratory of Structural Chemistry, University of Chinese Academy of Sciences, Fuzhou 350100, China
| | - Xinqiang Fang
- State Key Laboratory of Structural Chemistry, University of Chinese Academy of Sciences, Fuzhou 350100, China
- Key Laboratory of Coal to Ethylene Glycol and Its Related Technology, Center for Excellence in Molecular Synthesis, Fujian Institute of Research on the Structure of Matter, University of Chinese Academy of Sciences, Fuzhou 350100, China
- Key Laboratory of Synthetic Chemistry of Natural Substances, Shanghai Institute of Organic Chemistry, Shanghai 200032, China
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48
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Santra S, Maji U, Guin J. Enantioselective α-Amination of Acyclic 1,3-Dicarbonyls Catalyzed by N-Heterocyclic Carbene. Org Lett 2020; 22:468-473. [PMID: 31913633 DOI: 10.1021/acs.orglett.9b04232] [Citation(s) in RCA: 20] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
Herein, we describe a method for the catalytic enantioselective α-amination of α-substituted acyclic 1,3-ketoamides and 1,3-amidoesters that affords the products possessing N-substituted quaternary stereocenters with a chiral N-heterocyclic carbene (NHC). The reaction is based on the utilization of an intrinsic Brønsted base characteristic of NHC that enables the catalytic formation of a chiral ion pair comprising the enolate and the azolium ion. A series of challenging open-chain α-substituted 1,3-dicarbonyls are aminated via this method with ee's of ≤99%.
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Affiliation(s)
- Surojit Santra
- School of Chemical Sciences , Indian Association for the Cultivation of Science , 2A & 2B Raja S. C. Mullick Road , Jadavpur , Kolkata 700032 , India
| | - Ujjwal Maji
- School of Chemical Sciences , Indian Association for the Cultivation of Science , 2A & 2B Raja S. C. Mullick Road , Jadavpur , Kolkata 700032 , India
| | - Joyram Guin
- School of Chemical Sciences , Indian Association for the Cultivation of Science , 2A & 2B Raja S. C. Mullick Road , Jadavpur , Kolkata 700032 , India
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49
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Velasco-Rubio Á, Alexy EJ, Yoritate M, Wright AC, Stoltz BM. Stereospecific Overman Rearrangement of Substituted Cyclic Vinyl Bromides: Access to Fully Substituted α-Amino Ketones. Org Lett 2019; 21:8962-8965. [PMID: 31663754 DOI: 10.1021/acs.orglett.9b03347] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
A versatile thermal Overman rearrangement of enantioenriched, cyclic allylic alcohols providing tertiary allylic amines has been developed. The vinyl bromide used to control enantioselectivity in a preceding CBS reduction is utilized as a synthetic handle for the preparation of tertiary α-amino ketones and related derivatives in an asymmetric fashion.
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Affiliation(s)
- Álvaro Velasco-Rubio
- Warren and Katharine Schlinger Laboratory of Chemistry and Chemical Engineering, Division of Chemistry and Chemical Engineering , California Institute of Technology , Pasadena , California 91125 , United States
| | - Eric J Alexy
- Warren and Katharine Schlinger Laboratory of Chemistry and Chemical Engineering, Division of Chemistry and Chemical Engineering , California Institute of Technology , Pasadena , California 91125 , United States
| | - Makoto Yoritate
- Warren and Katharine Schlinger Laboratory of Chemistry and Chemical Engineering, Division of Chemistry and Chemical Engineering , California Institute of Technology , Pasadena , California 91125 , United States
| | - Austin C Wright
- Warren and Katharine Schlinger Laboratory of Chemistry and Chemical Engineering, Division of Chemistry and Chemical Engineering , California Institute of Technology , Pasadena , California 91125 , United States
| | - Brian M Stoltz
- Warren and Katharine Schlinger Laboratory of Chemistry and Chemical Engineering, Division of Chemistry and Chemical Engineering , California Institute of Technology , Pasadena , California 91125 , United States
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50
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Cheng C, Li Y, Zhang J, Zhao Y, Zhang L, Li C, Yang Y, Tang L, Yang Y. Organo‐Catalyzed Asymmetric Amination of 4‐Arylisoquinoline‐1,3(2
H
,4
H
)‐dione Derivatives in the Construction of Quaternary Stereocenters. Adv Synth Catal 2019. [DOI: 10.1002/adsc.201900980] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Affiliation(s)
- Cheng Cheng
- State Key Laboratory of Functions and Applications of Medicinal Plants, Guizhou Provincial Engineering Technology Research Center for Chemical Drug R&D, School of PharmacyGuizhou Medical University Guiyang 550014 People's Republic of China
| | - Ying‐Xian Li
- State Key Laboratory of Functions and Applications of Medicinal Plants, Guizhou Provincial Engineering Technology Research Center for Chemical Drug R&D, School of PharmacyGuizhou Medical University Guiyang 550014 People's Republic of China
| | - Ji‐Quan Zhang
- State Key Laboratory of Functions and Applications of Medicinal Plants, Guizhou Provincial Engineering Technology Research Center for Chemical Drug R&D, School of PharmacyGuizhou Medical University Guiyang 550014 People's Republic of China
| | - Yong‐Long Zhao
- State Key Laboratory of Functions and Applications of Medicinal Plants, Guizhou Provincial Engineering Technology Research Center for Chemical Drug R&D, School of PharmacyGuizhou Medical University Guiyang 550014 People's Republic of China
| | - Lin Zhang
- State Key Laboratory of Functions and Applications of Medicinal Plants, Guizhou Provincial Engineering Technology Research Center for Chemical Drug R&D, School of PharmacyGuizhou Medical University Guiyang 550014 People's Republic of China
| | - Chun Li
- State Key Laboratory of Functions and Applications of Medicinal Plants, Guizhou Provincial Engineering Technology Research Center for Chemical Drug R&D, School of PharmacyGuizhou Medical University Guiyang 550014 People's Republic of China
| | - Yu‐she Yang
- State Key Laboratory of Drug Research, Shanghai Institute of Materia MedicaChinese Academy of Sciences Shanghai 201203 People's Republic of China
| | - Lei Tang
- State Key Laboratory of Functions and Applications of Medicinal Plants, Guizhou Provincial Engineering Technology Research Center for Chemical Drug R&D, School of PharmacyGuizhou Medical University Guiyang 550014 People's Republic of China
| | - Yuan‐Yong Yang
- State Key Laboratory of Functions and Applications of Medicinal Plants, Guizhou Provincial Engineering Technology Research Center for Chemical Drug R&D, School of PharmacyGuizhou Medical University Guiyang 550014 People's Republic of China
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