1
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Suresh R, Orbach N, Marek I. Stereoinvertive S N1 Through Neighboring Group Participation. Angew Chem Int Ed Engl 2024:e202407602. [PMID: 38763909 DOI: 10.1002/anie.202407602] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/22/2024] [Revised: 05/16/2024] [Accepted: 05/17/2024] [Indexed: 05/21/2024]
Abstract
Neighboring group participation, the assistance of non-conjugated electrons to a reaction center, is a fundamental phenomenon in chemistry. In the framework of nucleophilic substitution reactions, neighboring group participation is known to cause rate acceleration, first order kinetics (SN1), and retention of configuration. The latter phenomenon is a result of double inversion: the first one when the neighboring group displaces the leaving group, and the second when a nucleophile substitutes the neighboring group. This powerful control of stereoretention has been widely used in organic synthesis for more than a century. However, neighboring group participation may also lead to inversion of configuration, a phenomenon which is often overlooked. Herein, we review this unique mode of stereoinversion, dividing the relevant reactions into three classes with the aim to introduce a fresh perspective on the different modes of stereoinversion via neighboring group participation as well as the factors that control this stereochemical outcome.
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Affiliation(s)
- Rahul Suresh
- Schulich Faculty of Chemistry and the Resnick Sustainability Center for Catalysis, Technion - Israel Institute of Technology, Technion City, Haifa, 3200009, Israel
| | - Noam Orbach
- Schulich Faculty of Chemistry and the Resnick Sustainability Center for Catalysis, Technion - Israel Institute of Technology, Technion City, Haifa, 3200009, Israel
| | - Ilan Marek
- Schulich Faculty of Chemistry and the Resnick Sustainability Center for Catalysis, Technion - Israel Institute of Technology, Technion City, Haifa, 3200009, Israel
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2
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Cui DQ, Wang YQ, Zhou B, Ye LW. Brønsted-Acid-Catalyzed Enantioselective Desymmetrization of 1,3-Diols: Access to Chiral β-Amino Alcohol Derivatives. Org Lett 2023; 25:9130-9135. [PMID: 38112554 DOI: 10.1021/acs.orglett.3c03525] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2023]
Abstract
Herein, we describe a Brønsted-acid-catalyzed enantioselective desymmetrization of 1,3-diols with alkynes through a hydroalkoxylation/hydrolysis process. The reaction leads to the atom-economical synthesis of valuable chiral β-amino alcohols under mild reaction conditions. Further synthetic transformations based on the β-amino alcohol moiety provide divergent approaches toward chiral N-containing heterocycles.
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Affiliation(s)
- Da-Qiu Cui
- Key Laboratory for Chemical Biology of Fujian Province and State Key Laboratory of Physical Chemistry of Solid Surfaces, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen, Fujian 361005, People's Republic of China
| | - Yu-Qi Wang
- Key Laboratory for Chemical Biology of Fujian Province and State Key Laboratory of Physical Chemistry of Solid Surfaces, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen, Fujian 361005, People's Republic of China
| | - Bo Zhou
- Key Laboratory for Chemical Biology of Fujian Province and State Key Laboratory of Physical Chemistry of Solid Surfaces, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen, Fujian 361005, People's Republic of China
| | - Long-Wu Ye
- Key Laboratory for Chemical Biology of Fujian Province and State Key Laboratory of Physical Chemistry of Solid Surfaces, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen, Fujian 361005, People's Republic of China
- State Key Laboratory of Elemento-Organic Chemistry, Nankai University, Tianjin 300071, People's Republic of China
- State Key Laboratory of Organometallic Chemistry, Chinese Academy of Sciences, Shanghai 200032, People's Republic of China
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3
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Horwitz MA, Dürr AB, Afratis K, Chen Z, Soika J, Christensen KE, Fushimi M, Paton RS, Gouverneur V. Regiodivergent Nucleophilic Fluorination under Hydrogen Bonding Catalysis: A Computational and Experimental Study. J Am Chem Soc 2023; 145:9708-9717. [PMID: 37079853 PMCID: PMC10161234 DOI: 10.1021/jacs.3c01303] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/22/2023]
Abstract
The controlled programming of regiochemical outcomes in nucleophilic fluorination reactions with alkali metal fluoride is a problem yet to be solved. Herein, two synergistic approaches exploiting hydrogen bonding catalysis are presented. First, we demonstrate that modulating the charge density of fluoride with a hydrogen-bond donor urea catalyst directly influences the kinetic regioselectivity in the fluorination of dissymmetric aziridinium salts with aryl and ester substituents. Moreover, we report a urea-catalyzed formal dyotropic rearrangement, a thermodynamically controlled regiochemical editing process consisting of C-F bond scission followed by fluoride rebound. These findings offer a route to access enantioenriched fluoroamine regioisomers from a single chloroamine precursor, and more generally, new opportunities in regiodivergent asymmetric (bis)urea-based organocatalysis.
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Affiliation(s)
- Matthew A Horwitz
- Chemistry Research Laboratory, University of Oxford, 12 Mansfield Road, Oxford OX1 3TA, U.K
| | - Alexander B Dürr
- Chemistry Research Laboratory, University of Oxford, 12 Mansfield Road, Oxford OX1 3TA, U.K
| | - Konstantinos Afratis
- Chemistry Research Laboratory, University of Oxford, 12 Mansfield Road, Oxford OX1 3TA, U.K
| | - Zijun Chen
- Chemistry Research Laboratory, University of Oxford, 12 Mansfield Road, Oxford OX1 3TA, U.K
| | - Julia Soika
- Chemistry Research Laboratory, University of Oxford, 12 Mansfield Road, Oxford OX1 3TA, U.K
| | - Kirsten E Christensen
- Chemistry Research Laboratory, University of Oxford, 12 Mansfield Road, Oxford OX1 3TA, U.K
| | - Makoto Fushimi
- Takeda Pharmaceutical Company Limited, 26-1, Muraoka-Higashi 2-Chome, Fujisawa, Kanagawa 251-8555, Japan
| | - Robert S Paton
- Department of Chemistry, Colorado State University, Fort Collins, Colorado 80528, United States
| | - Véronique Gouverneur
- Chemistry Research Laboratory, University of Oxford, 12 Mansfield Road, Oxford OX1 3TA, U.K
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4
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Wang M, Zhang C, Ci C, Jiang H, Dixneuf PH, Zhang M. Room Temperature Construction of Vicinal Amino Alcohols via Electroreductive Cross-Coupling of N-Heteroarenes and Carbonyls. J Am Chem Soc 2023; 145:10967-10973. [PMID: 37075201 DOI: 10.1021/jacs.3c02776] [Citation(s) in RCA: 8] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/21/2023]
Abstract
Despite the widespread applications of α-hydroxyalkyl cyclic amines, direct and diverse access to such a class of unique vicinal amino alcohols still remains, to date, a challenge. Here, through a strategy of electroreductive α-hydroxyalkylation of inactive N-heteroarenes with ketones or electron-rich arylaldehydes, we describe a room temperature approach for the direct construction of α-hydroxyalkyl cyclic amines, which features a broad substrate scope, operational simplicity, high chemoselectivity, and no need for pressurized H2 gas and transition metal catalysts. The zinc ion generated from anode oxidation plays a crucial role in the activation of both reactants by decreasing their reduction potentials. The strategy of electroreduction in combination with substrate activation by Lewis acids in this work is anticipated to develop more useful transformations.
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Affiliation(s)
- Maorui Wang
- Key Lab of Functional Molecular Engineering of Guangdong Province, School of Chemistry and Chemical Engineering, South China University of Technology, Guangzhou 510641, China
| | - Chengqian Zhang
- Key Lab of Functional Molecular Engineering of Guangdong Province, School of Chemistry and Chemical Engineering, South China University of Technology, Guangzhou 510641, China
| | - Chenggang Ci
- Key Laboratory of Computational Catalytic Chemistry of Guizhou Province, Department of Chemistry and Chemical Engineering, Qiannan Normal University for Nationalities, Duyun 558000, China
| | - Huanfeng Jiang
- Key Lab of Functional Molecular Engineering of Guangdong Province, School of Chemistry and Chemical Engineering, South China University of Technology, Guangzhou 510641, China
| | | | - Min Zhang
- Key Lab of Functional Molecular Engineering of Guangdong Province, School of Chemistry and Chemical Engineering, South China University of Technology, Guangzhou 510641, China
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5
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Debbah Z, Marrot J, Auberger N, Désiré J, Blériot Y. Stereoselective Access to Iminosugar C, C-Glycosides from 6-Azidoketopyranoses. Org Lett 2022; 24:4542-4546. [PMID: 35731688 DOI: 10.1021/acs.orglett.2c01560] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
We report the synthesis of iminosugar C,C-glycosides starting from 6-azidoketopyranoses. Their Staudinger-azaWittig-mediated cyclization provided bicyclic N,O-acetals, which were stereoselectively opened with AllMgBr to afford β-hydroxyazepanes with a quaternary carbon α to the nitrogen. Their ring contraction via a β-aminoalcohol rearrangement produced the six-membered l-iminosugars with two functional handles at the pseudoanomeric position. Inversion of the free OH at the azepane level furnished the d-iminosugars.
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Affiliation(s)
- Zakaria Debbah
- Université de Poitiers, IC2MP, UMR CNRS 7285, Equipe "OrgaSynth", Groupe Glycochimie, 4 rue Michel Brunet, 86073 Poitiers Cedex 9, France
| | - Jérôme Marrot
- Institut Lavoisier de Versailles, UMR-CNRS 8180, Université de Versailles, 5 avenue des États-Unis, 78035 Versailles Cedex, France
| | - Nicolas Auberger
- Université de Poitiers, IC2MP, UMR CNRS 7285, Equipe "OrgaSynth", Groupe Glycochimie, 4 rue Michel Brunet, 86073 Poitiers Cedex 9, France
| | - Jérôme Désiré
- Université de Poitiers, IC2MP, UMR CNRS 7285, Equipe "OrgaSynth", Groupe Glycochimie, 4 rue Michel Brunet, 86073 Poitiers Cedex 9, France
| | - Yves Blériot
- Université de Poitiers, IC2MP, UMR CNRS 7285, Equipe "OrgaSynth", Groupe Glycochimie, 4 rue Michel Brunet, 86073 Poitiers Cedex 9, France
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6
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Reissig F, Mamat C. Strained Ammonium Precursors for Radiofluorinations. Chemistry 2022; 11:e202200039. [PMID: 35736542 PMCID: PMC9220932 DOI: 10.1002/open.202200039] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/21/2022] [Revised: 05/24/2022] [Indexed: 12/11/2022]
Abstract
The increasing application of positron emission tomography (PET) in nuclear medicine has stimulated the extensive development of a multitude of novel and versatile techniques to introduce fluorine‐18, especially for the radiolabelling of biologically or pharmacologically active molecules. Taking into consideration that the introduction of fluorine‐18 (t1/2=109.8 min) mostly proceeds under harsh conditions, radiolabelling of such molecules represents a challenge and is of enormous interest. Ideally, it should proceed in a regioselective manner under mild physiological conditions, in an acceptable time span, with high yields and high specific activities. Special attention has been drawn to 2‐fluoroethyl and 3‐fluoropropyl groups, which are often the active sites of radiofluorinated compounds. Precursors containing an ammonium leaving group – such as a strained azetidinium or aziridinium moiety – can help to overcome these obstacles leading to a convenient and mild introduction of [18F]fluoride with high radiochemical yields.
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Affiliation(s)
- Falco Reissig
- Institut für Radiopharmazeutische Krebsforschung Helmholtz-Zentrum Dresden-Rossendorf, Bautzner Landstraße 400, 01328, Dresden, Germany.,Fakultät Chemie und Lebensmittelchemie, Technische Universität Dresden, 01062, Dresden, Germany
| | - Constantin Mamat
- Institut für Radiopharmazeutische Krebsforschung Helmholtz-Zentrum Dresden-Rossendorf, Bautzner Landstraße 400, 01328, Dresden, Germany.,Fakultät Chemie und Lebensmittelchemie, Technische Universität Dresden, 01062, Dresden, Germany
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7
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Helbing T, Georg M, Stöhr F, Carraro C, Becker J, Gatto B, Göttlich R. Understanding the Alkylation Mechanism of 3‐Chloropiperidines – NMR Kinetic Studies and Isolation of Bicyclic Aziridinium Ions. European J Org Chem 2021. [DOI: 10.1002/ejoc.202101072] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Tim Helbing
- Institute of Organic Chemistry Justus Liebig University Giessen Heinrich-Buff-Ring 17 35392 Giessen Germany
| | - Mats Georg
- Institute of Organic Chemistry Justus Liebig University Giessen Heinrich-Buff-Ring 17 35392 Giessen Germany
| | - Fabian Stöhr
- Institute of Organic Chemistry Justus Liebig University Giessen Heinrich-Buff-Ring 17 35392 Giessen Germany
- Institute of Inorganic and Analytical Chemistry Justus Liebig University Giessen Heinrich-Buff-Ring 17 35392 Giessen Germany
| | - Caterina Carraro
- Department of Pharmaceutical and Pharmacological Sciences University of Padova Via Francesco Marzolo 5 35131 Padova Italy
| | - Jonathan Becker
- Institute of Inorganic and Analytical Chemistry Justus Liebig University Giessen Heinrich-Buff-Ring 17 35392 Giessen Germany
| | - Barbara Gatto
- Department of Pharmaceutical and Pharmacological Sciences University of Padova Via Francesco Marzolo 5 35131 Padova Italy
| | - Richard Göttlich
- Institute of Organic Chemistry Justus Liebig University Giessen Heinrich-Buff-Ring 17 35392 Giessen Germany
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8
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Zhou XY, Chen X. ZnCl2 Catalyzed Ring-Opening Reaction of Symmetrical Epoxides with Aromatic Amines for the Synthesis of 1,2-Amino Alcohols. ORG PREP PROCED INT 2021. [DOI: 10.1080/00304948.2021.1994289] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
Affiliation(s)
- Xiao-Yu Zhou
- School of Chemistry and Materials Engineering, Liupanshui Normal University, Liupanshui, China
| | - Xia Chen
- School of Chemistry and Materials Engineering, Liupanshui Normal University, Liupanshui, China
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9
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Kaźmierczak M, Bilska‐Markowska M. Diethylaminosulfur Trifluoride (DAST) Mediated Transformations Leading to Valuable Building Blocks and Bioactive Compounds. European J Org Chem 2021. [DOI: 10.1002/ejoc.202101027] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Affiliation(s)
- Marcin Kaźmierczak
- Faculty of Chemistry Adam Mickiewicz University in Poznań Uniwersytetu Poznańskiego 8 61-614 Poznań Poland
- Centre for Advanced Technologies Adam Mickiewicz University in Poznań Uniwersytetu Poznańskiego 10 61-614 Poznań Poland
| | - Monika Bilska‐Markowska
- Faculty of Chemistry Adam Mickiewicz University in Poznań Uniwersytetu Poznańskiego 8 61-614 Poznań Poland
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10
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Li Y, Ali A, Dong J, Zhang Y, Shi L, Liu Q, Fu J. Copper-Catalyzed Diamination of Unactivated Alkenes With Electron-Rich Amino Sources. Org Lett 2021; 23:4072-4077. [PMID: 33970646 DOI: 10.1021/acs.orglett.1c01313] [Citation(s) in RCA: 15] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
The catalytic intermolecular diamination of unactivated alkenes with electron-rich amino sources is a challenge. Herein, by employing a directing-group strategy, a copper-catalyzed diamination of unactivated alkenes was realized. Symmetrical diamines were efficiently produced in a highly diastereoselective manner with readily available dialkylamines as amino sources, while a one-pot and two-step operation was necessary to produce the unsymmetrical diamines. These reactions were proposed to proceed through aziridinium intermediates.
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Affiliation(s)
- Yang Li
- Jilin Province Key Laboratory of Organic Functional Molecular Design & Synthesis, Department of Chemistry, Northeast Normal University, Changchun 130024, China
| | - Arshad Ali
- Jilin Province Key Laboratory of Organic Functional Molecular Design & Synthesis, Department of Chemistry, Northeast Normal University, Changchun 130024, China
| | - Junchao Dong
- Jilin Province Key Laboratory of Organic Functional Molecular Design & Synthesis, Department of Chemistry, Northeast Normal University, Changchun 130024, China
| | - Yu Zhang
- Jilin Province Key Laboratory of Organic Functional Molecular Design & Synthesis, Department of Chemistry, Northeast Normal University, Changchun 130024, China
| | - Lili Shi
- State Key Laboratory of Chemical Oncogenomics and Key Laboratory of Chemical Genomics, Shenzhen Graduate School, Peking University, Shenzhen 518055, China
| | - Qun Liu
- Jilin Province Key Laboratory of Organic Functional Molecular Design & Synthesis, Department of Chemistry, Northeast Normal University, Changchun 130024, China
| | - Junkai Fu
- Jilin Province Key Laboratory of Organic Functional Molecular Design & Synthesis, Department of Chemistry, Northeast Normal University, Changchun 130024, China.,State Key Laboratory of Chemical Oncogenomics and Key Laboratory of Chemical Genomics, Shenzhen Graduate School, Peking University, Shenzhen 518055, China
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11
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Synthetic Applications of Aziridinium Ions. Molecules 2021; 26:molecules26061774. [PMID: 33809951 PMCID: PMC8004105 DOI: 10.3390/molecules26061774] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/02/2021] [Revised: 03/16/2021] [Accepted: 03/17/2021] [Indexed: 11/30/2022] Open
Abstract
Nonactivated aziridine with an electron-donating group at the ring nitrogen should be activated to an aziridinium ion prior to being converted to cyclic and acyclic nitrogen-containing molecules. This review describes ways to generate aziridinium ions and their utilization for synthetic purposes. Specifically, the intra- and intermolecular formation of aziridinium ions with proper electrophiles are classified, and their regio- and stereoselective transformations with nucleophiles are described on the basis of recent developments.
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12
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Yi X, Chen Y, Huang A, Song D, He J, Ling F, Zhong W. Design of chiral ferrocenylphosphine-spiro phosphonamidite ligands for ruthenium-catalyzed highly enantioselective coupling of 1,2-diols with amines. Org Chem Front 2021. [DOI: 10.1039/d1qo01443a] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
Abstract
A series of chiral ferrocene-backbone phosphines-spiro phosphonamidite ligands was developed for ruthenium-catalyzed enantioselective access to a broad range of β-amino alcohols from 1,2-diols and amines via the borrowing-hydrogen prciniple.
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Affiliation(s)
- Xiao Yi
- College of Pharmaceutical Sciences, Zhejiang University of Technology, Hangzhou 310014, P. R. China
| | - Yirui Chen
- College of Pharmaceutical Sciences, Zhejiang University of Technology, Hangzhou 310014, P. R. China
| | - An Huang
- College of Pharmaceutical Sciences, Zhejiang University of Technology, Hangzhou 310014, P. R. China
| | - Dingguo Song
- College of Pharmaceutical Sciences, Zhejiang University of Technology, Hangzhou 310014, P. R. China
| | - Jiaying He
- College of Pharmaceutical Sciences, Zhejiang University of Technology, Hangzhou 310014, P. R. China
| | - Fei Ling
- College of Pharmaceutical Sciences, Zhejiang University of Technology, Hangzhou 310014, P. R. China
| | - Weihui Zhong
- College of Pharmaceutical Sciences, Zhejiang University of Technology, Hangzhou 310014, P. R. China
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13
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Blériot Y. Contributing to the Study of Enzymatic and Chemical Glycosyl Transfer Through the Observation and Mimicry of Glycosyl Cations. SYNTHESIS-STUTTGART 2020. [DOI: 10.1055/s-0040-1706073] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
Abstract
AbstractThis account describes our efforts dedicated to: 1) the design of glycomimetics aimed at targeting therapeutically relevant carbohydrate processing enzymes, and 2) the observation, characterization, and exploitation of glycosyl cations as a tool for studying the glycosylation reaction. These findings have brought important data regarding this key ionic species as well as innovative strategies to access iminosugars of interest.1 Introduction2 The Glycosyl Cation, A Central Species in Glycosciences2.1 A Selection of the Strategies Developed so far to Gain Insights into Glycosyl Cations Structure2.2 When Superacids Meet Carbohydrates3 Chemical Probes to Gain Insights into the Pseudorotational Itinerary of Glycosides During Glycosidic Bond Hydrolysis3.1 Conformationally Locked Glycosides3.1.1 The Xylopyranose Case3.1.2 The Mannopyranose Case3.2 Conformationally Flexible Iminosugars3.2.1 Nojirimycin Ring Homologues3.2.2 Noeuromycin Ring Homologues3.2.3 Seven-Membered Iminosugar C-Glycosides4 N-Acetyl-d-glucosamine Mimics5 Ring Contraction: A Useful Tool to Increase Iminosugar’s Structural Diversity6 Regioselective Deprotection of Iminosugar C-Glycosides to Introduce Diversity at C2 Position7 Conclusion
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14
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Gernet A, Ratovelomanana‐Vidal V, Pirat J, Virieux D, Ayad T. Efficient Synthesis of 2‐Amino‐1‐Arylethanols Through a Lewis Base‐Catalyzed SiCl
4
‐Mediated Asymmetric Passerini‐Type Reaction. European J Org Chem 2020. [DOI: 10.1002/ejoc.202001172] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Aurélie Gernet
- CNRS, AM2N, ENSCM Institut Charles Gerhardt UMR 5253 8 rue de l'Ecole Normale 34296 Montpellier France
| | - Virginie Ratovelomanana‐Vidal
- Institute of Chemistry for Life & Health Sciences PSL University, Chimie ParisTech‐CNRS 11 rue Pierre et Marie Curie 75005 Paris France
| | - Jean‐Luc Pirat
- CNRS, AM2N, ENSCM Institut Charles Gerhardt UMR 5253 8 rue de l'Ecole Normale 34296 Montpellier France
| | - David Virieux
- CNRS, AM2N, ENSCM Institut Charles Gerhardt UMR 5253 8 rue de l'Ecole Normale 34296 Montpellier France
| | - Tahar Ayad
- CNRS, AM2N, ENSCM Institut Charles Gerhardt UMR 5253 8 rue de l'Ecole Normale 34296 Montpellier France
- Institute of Chemistry for Life & Health Sciences PSL University, Chimie ParisTech‐CNRS 11 rue Pierre et Marie Curie 75005 Paris France
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15
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Chen S, Ruan Y, Lu JL, Hunter L, Hu XG. Diastereoselective synthesis and conformational analysis of 4,5-difluoropipecolic acids. Org Biomol Chem 2020; 18:8192-8198. [PMID: 33030197 DOI: 10.1039/d0ob01811b] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
Stereoselectively-fluorinated analogs of pipecolic acid have been investigated through a combined theoretical and experimental approach. Three of the four possible diastereoisomers of 4,5-difluoropipecolic acid were successfully synthesized via deoxyfluorination chemistry, navigating a complex reaction network that included neighboring group participation, rearrangement, and elimination pathways. A DFT-based conformational study, supported by NMR J-based analysis, revealed that the different diastereoisomers of 4,5-difluoropipecolic acid preferentially adopt different puckers of the six-membered ring. These findings could have future relevance for the conformational control of biologically active peptides.
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Affiliation(s)
- Suo Chen
- National Engineering Research Center for Carbohydrate Synthesis, Jiangxi Normal University, Nanchang 330022, P. R. China.
| | - Yao Ruan
- National Engineering Research Center for Carbohydrate Synthesis, Jiangxi Normal University, Nanchang 330022, P. R. China.
| | - Ji-Liang Lu
- National Engineering Research Center for Carbohydrate Synthesis, Jiangxi Normal University, Nanchang 330022, P. R. China.
| | - Luke Hunter
- School of Chemistry, The University of New South Wales (UNSW), Sydney 2052, Australia.
| | - Xiang-Guo Hu
- National Engineering Research Center for Carbohydrate Synthesis, Jiangxi Normal University, Nanchang 330022, P. R. China. and Key Laboratory of Small Functional Organic Molecules, Jiangxi Normal University, Nanchang, 330022, P. R. China
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16
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Govaerts S, Angelini L, Hampton C, Malet‐Sanz L, Ruffoni A, Leonori D. Photoinduced Olefin Diamination with Alkylamines. Angew Chem Int Ed Engl 2020; 59:15021-15028. [PMID: 32432808 PMCID: PMC7497254 DOI: 10.1002/anie.202005652] [Citation(s) in RCA: 54] [Impact Index Per Article: 13.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/18/2020] [Revised: 05/19/2020] [Indexed: 11/07/2022]
Abstract
Vicinal diamines are ubiquitous materials in organic and medicinal chemistry. The direct coupling of olefins and amines would be an ideal approach to construct these motifs. However, alkene diamination remains a long-standing challenge in organic synthesis, especially when using two different amine components. We report a general strategy for the direct and selective assembly of vicinal 1,2-diamines using readily available olefin and amine building blocks. This mild and straightforward approach involves in situ formation and photoinduced activation of N-chloroamines to give aminium radicals that enable efficient alkene aminochlorination. Owing to the ambiphilic nature of the β-chloroamines produced, conversion into tetra-alkyl aziridinium ions was possible, thus enabling diamination by regioselective ring-opening with primary or secondary amines. This strategy streamlines the preparation of vicinal diamines from multistep sequences to a single chemical transformation.
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Affiliation(s)
- Sebastian Govaerts
- Department of ChemistryUniversity of ManchesterOxford RoadManchesterM13 9PLUK
| | - Lucrezia Angelini
- Department of ChemistryUniversity of ManchesterOxford RoadManchesterM13 9PLUK
| | - Charlotte Hampton
- Department of ChemistryUniversity of ManchesterOxford RoadManchesterM13 9PLUK
| | - Laia Malet‐Sanz
- Eli Lilly and Company LimitedErl Wood ManorWindleshamSurreyGU20 6PHUK
| | - Alessandro Ruffoni
- Department of ChemistryUniversity of ManchesterOxford RoadManchesterM13 9PLUK
| | - Daniele Leonori
- Department of ChemistryUniversity of ManchesterOxford RoadManchesterM13 9PLUK
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17
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Otevrel J, Svestka D, Bobal P. One-pot method for the synthesis of 1-aryl-2-aminoalkanol derivatives from the corresponding amides or nitriles. RSC Adv 2020; 10:25029-25045. [PMID: 35557503 PMCID: PMC9092634 DOI: 10.1039/d0ra04359a] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/15/2020] [Accepted: 06/09/2020] [Indexed: 12/15/2022] Open
Abstract
We have identified a novel one-pot method for the synthesis of β-amino alcohols, which is based on C–H bond hydroxylation at the benzylic α-carbon atom with a subsequent nitrile or amide functional group reduction. This cascade process uses molecular oxygen as an oxidant and sodium bis(2-methoxyethoxy)aluminum hydride as a reductant. The substrate scope was examined on 30 entries and, although the respective products were provided in moderate yields only, the above simple protocol may serve as a direct and powerful entry to the sterically congested 1,2-amino alcohols that are difficult to prepare by other routes. The plausible mechanistic rationale for the observed results is given and the reaction was applied to a synthesis of a potentially bioactive target. A one-pot method for β-amino alcohol synthesis based on α-hydroxylation and subsequent amide or nitrile functional group reduction has been identified and examined.![]()
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Affiliation(s)
- Jan Otevrel
- Department of Chemical Drugs, Faculty of Pharmacy, Masaryk University Palackeho 1946/1 612 42 Brno Czech Republic
| | - David Svestka
- Department of Chemical Drugs, Faculty of Pharmacy, Masaryk University Palackeho 1946/1 612 42 Brno Czech Republic
| | - Pavel Bobal
- Department of Chemical Drugs, Faculty of Pharmacy, Masaryk University Palackeho 1946/1 612 42 Brno Czech Republic
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18
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Govaerts S, Angelini L, Hampton C, Malet‐Sanz L, Ruffoni A, Leonori D. Photoinduced Olefin Diamination with Alkylamines. Angew Chem Int Ed Engl 2020. [DOI: 10.1002/ange.202005652] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Sebastian Govaerts
- Department of Chemistry University of Manchester Oxford Road Manchester M13 9PL UK
| | - Lucrezia Angelini
- Department of Chemistry University of Manchester Oxford Road Manchester M13 9PL UK
| | - Charlotte Hampton
- Department of Chemistry University of Manchester Oxford Road Manchester M13 9PL UK
| | - Laia Malet‐Sanz
- Eli Lilly and Company Limited Erl Wood Manor Windlesham Surrey GU20 6PH UK
| | - Alessandro Ruffoni
- Department of Chemistry University of Manchester Oxford Road Manchester M13 9PL UK
| | - Daniele Leonori
- Department of Chemistry University of Manchester Oxford Road Manchester M13 9PL UK
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19
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Zhu W, Doubleday PF, Catlin DS, Weerawarna PM, Butrin A, Shen S, Wawrzak Z, Kelleher NL, Liu D, Silverman RB. A Remarkable Difference That One Fluorine Atom Confers on the Mechanisms of Inactivation of Human Ornithine Aminotransferase by Two Cyclohexene Analogues of γ-Aminobutyric Acid. J Am Chem Soc 2020; 142:4892-4903. [PMID: 32114761 DOI: 10.1021/jacs.0c00193] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Abstract
Human ornithine aminotransferase (hOAT), a pyridoxal 5'-phosphate-dependent enzyme, plays a critical role in the progression of hepatocellular carcinoma (HCC). Pharmacological selective inhibition of hOAT has been shown to be a potential therapeutic approach for HCC. Inspired by the discovery of the nonselective aminotransferase inactivator (1R,3S,4S)-3-amino-4-fluoro cyclopentane-1-carboxylic acid (1), in this work, we rationally designed, synthesized, and evaluated a novel series of fluorine-substituted cyclohexene analogues, thereby identifying 8 and 9 as novel selective hOAT time-dependent inhibitors. Intact protein mass spectrometry and protein crystallography demonstrated 8 and 9 as covalent inhibitors of hOAT, which exhibit two distinct inactivation mechanisms resulting from the difference of a single fluorine atom. Interestingly, they share a similar turnover mechanism, according to the mass spectrometry-based analysis of metabolites and fluoride ion release experiments. Molecular dynamics (MD) simulations and electrostatic potential (ESP) charge calculations were conducted, which elucidated the significant influence of the one-fluorine difference on the corresponding intermediates, leading to two totally different inactivation pathways. The novel addition-aromatization inactivation mechanism for 9 contributes to its significantly enhanced potency, along with excellent selectivity over other aminotransferases.
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Affiliation(s)
- Wei Zhu
- Department of Chemistry, Chemistry of Life Processes Institute, Center for Molecular Innovation and Drug Discovery, and Center for Developmental Therapeutics, Northwestern University, Evanston, Illinois 60208, United States
| | - Peter F Doubleday
- Department of Molecular Biosciences, Northwestern University, Evanston, Illinois 60208, United States
| | - Daniel S Catlin
- Department of Chemistry and Biochemistry, Loyola University Chicago, Chicago, Illinois 60660, United States
| | - Pathum M Weerawarna
- Department of Chemistry, Chemistry of Life Processes Institute, Center for Molecular Innovation and Drug Discovery, and Center for Developmental Therapeutics, Northwestern University, Evanston, Illinois 60208, United States
| | - Arseniy Butrin
- Department of Chemistry and Biochemistry, Loyola University Chicago, Chicago, Illinois 60660, United States
| | - Sida Shen
- Department of Chemistry, Chemistry of Life Processes Institute, Center for Molecular Innovation and Drug Discovery, and Center for Developmental Therapeutics, Northwestern University, Evanston, Illinois 60208, United States
| | - Zdzislaw Wawrzak
- Synchrotron Research Center, LS-CAT, Sector 21, Northwestern University, Lemont, Illinois 60439, United States
| | - Neil L Kelleher
- Department of Chemistry, Chemistry of Life Processes Institute, Center for Molecular Innovation and Drug Discovery, and Center for Developmental Therapeutics, Northwestern University, Evanston, Illinois 60208, United States.,Department of Molecular Biosciences, Northwestern University, Evanston, Illinois 60208, United States
| | - Dali Liu
- Department of Chemistry and Biochemistry, Loyola University Chicago, Chicago, Illinois 60660, United States
| | - Richard B Silverman
- Department of Chemistry, Chemistry of Life Processes Institute, Center for Molecular Innovation and Drug Discovery, and Center for Developmental Therapeutics, Northwestern University, Evanston, Illinois 60208, United States.,Department of Molecular Biosciences, Northwestern University, Evanston, Illinois 60208, United States.,Department of Pharmacology, Northwestern University, Chicago, Illinois 60611, United States
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20
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Wosińska-Hrydczuk M, Boratyński PJ, Skarżewski J. Regioselective and Stereodivergent Synthesis of Enantiomerically Pure Vic-Diamines from Chiral β-Amino Alcohols with 2-Pyridyl and 6-(2,2'-Bipyridyl) Moieties. Molecules 2020; 25:molecules25030727. [PMID: 32046110 PMCID: PMC7037692 DOI: 10.3390/molecules25030727] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/11/2020] [Revised: 02/01/2020] [Accepted: 02/06/2020] [Indexed: 11/16/2022] Open
Abstract
In this report, we describe the synthetic elaboration of the easily available enantiomerically pure β-amino alcohols. Attempted direct substitution of the hydroxyl group by azido-functionality in the Mitsunobu reaction with hydrazoic acid was inefficient or led to a diastereomeric mixture. These outcomes resulted from the participation of aziridines. Intentionally performed internal Mitsunobu reaction of β-amino alcohols gave eight chiral aziridines in 45-82% yield. The structural and configuration identity of products was confirmed by NMR data compared to the DFT calculated GIAO values. For 1,2,3-trisubstituted aziridines slow configurational inversion at the endocyclic nitrogen atom was observed by NMR at room temperature. Moreover, when aziridine was titrated with Zn(OAc)2 under NMR control, only one of two N-epimers directly participated in complexation. The aziridines underwent ring opening with HN3 to form the corresponding azido amines as single regio- and diastereomers in 90-97% yield. Different results were obtained for 1,2-disubstituted and 1,2,3-trisubstituted aziridines. For the later aziridines ring closure and ring opening occurred at different carbon stereocenters, thus yielding products with two inverted configurations, compared to the starting amino alcohol. The 1,2-disubstituted aziridines produced azido amines of the same configuration as the starting β-amino alcohols. To obtain a complete series of diastereomeric vic-diamines, we converted the amino alcohols into cyclic sulfamidates, which reacted with sodium azide in SN2 reaction (25-58% overall yield). The azides obtained either way underwent the Staudinger reduction, giving a series of six new chiral vic-diamines of defined stereochemistries.
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21
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Narczyk A, Stecko S. An entry to non-racemic β-tertiary-β-amino alcohols, building blocks for the synthesis of aziridine, piperazine, and morpholine scaffolds. Org Biomol Chem 2020; 18:5972-5981. [DOI: 10.1039/d0ob01315c] [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
The synthesis of α-dialkyl-substituted non-racemic allyl alcohols and their transformation into enantiomerically enriched 1,1-dialkylated 1,2-aminoalcohols, aziridines, morpholines and piperazines is reported.
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Affiliation(s)
- Aleksandra Narczyk
- Institute of Organic Chemistry
- Polish Academy of Sciences
- 01-224 Warsaw
- Poland
| | - Sebastian Stecko
- Institute of Organic Chemistry
- Polish Academy of Sciences
- 01-224 Warsaw
- Poland
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22
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Zou L, Ruan Y, Jiang W, Yan N, Liu D, Yu C, Hu X. Switchable Regioselectivity in the Opening of Aziridine by Fluoride: DFT Calculation and Synthesis of Fluorinated Piperidines. ChemistrySelect 2019. [DOI: 10.1002/slct.201903403] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Liangjing Zou
- National Engineering Research Center for Carbohydrate SynthesisJiangxi Normal University, Nanchang 330022 Jiangxi China
- Key Laboratory of Small Functional Organic Molecule, Ministry of EducationJiangxi Normal University, Nanchang Jiangxi 330022 P.R. China
| | - Yao Ruan
- National Engineering Research Center for Carbohydrate SynthesisJiangxi Normal University, Nanchang 330022 Jiangxi China
- Key Laboratory of Small Functional Organic Molecule, Ministry of EducationJiangxi Normal University, Nanchang Jiangxi 330022 P.R. China
| | - Wei Jiang
- Research Center for Traditional Chinese Medicine Resources and Ethnic Minority MedicineJiangxi University of Traditional Chinese Medicine China
| | - Nan Yan
- National Engineering Research Center for Carbohydrate SynthesisJiangxi Normal University, Nanchang 330022 Jiangxi China
- Key Laboratory of Small Functional Organic Molecule, Ministry of EducationJiangxi Normal University, Nanchang Jiangxi 330022 P.R. China
| | - De‐Yong Liu
- National Engineering Research Center for Carbohydrate SynthesisJiangxi Normal University, Nanchang 330022 Jiangxi China
| | - Chu‐Yi Yu
- Beijing National Laboratory for Molecular Science (BNLMS), CAS Key Laboratory of Molecular Recognition and Function, Institute of ChemistryChinese Academy of Sciences Beijing 100190 China
| | - Xiang‐Guo Hu
- National Engineering Research Center for Carbohydrate SynthesisJiangxi Normal University, Nanchang 330022 Jiangxi China
- Key Laboratory of Small Functional Organic Molecule, Ministry of EducationJiangxi Normal University, Nanchang Jiangxi 330022 P.R. China
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23
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Abstract
Enantiopure β-amino alcohols constitute one of the most significant building blocks for the synthesis of active pharmaceutical ingredients. Despite the availability of a range of chiral β-amino alcohols from a chiral pool, there is a growing demand for new enantioselective synthetic routes to vicinal amino alcohols and their derivatives. In the present study, an asymmetric 2-step catalytic route that converts 4-anisaldehyde into a β-amino alcohol derivative, (S)-tembamide, with excellent enantiopurity (98% enantiomeric excess) has been developed. The recently published initial step consists in a concurrent biocatalytic cascade for the synthesis of (S)-4-methoxymandelonitrile benzoate. The O-benzoyl cyanohydrin is then converted to (S)-tembamide in a hydrogenation reaction catalyzed by Raney Ni. To achieve hydrogenation of the nitrile moiety with highest chemoselectivity and enantioretention, various parameters such as nature of the catalyst, reaction temperature and hydrogen pressure were studied. The reported strategy might be transferrable to the synthesis of other N-acyl-β-amino alcohols.
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24
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Yuan J, Deng B, Liang Y, Rao CB, Zhang R, Zhao Y, Dong D. PIFA/TEMPO‐Mediated Oxidative Cascade Cyclization of
α
‐[(
β
‐Amino)propenoyl]‐Alkylamides: Access to Polysubstituted 3,7‐Dihydrooxazolo[4,5‐
c
]pyridine‐2,4,6(5
H
)‐triones. Adv Synth Catal 2019. [DOI: 10.1002/adsc.201900741] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
Affiliation(s)
- Jingwen Yuan
- Key Laboratory of High-Performance Synthetic Rubber and its Composites, Changchun Institute of Applied ChemistryChinese Academy of Sciences Changchun 130022 People's Republic of China
| | - Bicheng Deng
- Key Laboratory of Preparation and Application of Environmental Friendly Materials of the Ministry of EducationJilin Normal University Changchun 130103 People's Republic of China
- Key Laboratory of High-Performance Synthetic Rubber and its Composites, Changchun Institute of Applied ChemistryChinese Academy of Sciences Changchun 130022 People's Republic of China
| | - Yongjiu Liang
- Key Laboratory of High-Performance Synthetic Rubber and its Composites, Changchun Institute of Applied ChemistryChinese Academy of Sciences Changchun 130022 People's Republic of China
| | - Chitturi Bhujanga Rao
- Key Laboratory of High-Performance Synthetic Rubber and its Composites, Changchun Institute of Applied ChemistryChinese Academy of Sciences Changchun 130022 People's Republic of China
| | - Rui Zhang
- Key Laboratory of High-Performance Synthetic Rubber and its Composites, Changchun Institute of Applied ChemistryChinese Academy of Sciences Changchun 130022 People's Republic of China
| | - Yanning Zhao
- Key Laboratory of Preparation and Application of Environmental Friendly Materials of the Ministry of EducationJilin Normal University Changchun 130103 People's Republic of China
| | - Dewen Dong
- Key Laboratory of Preparation and Application of Environmental Friendly Materials of the Ministry of EducationJilin Normal University Changchun 130103 People's Republic of China
- Key Laboratory of High-Performance Synthetic Rubber and its Composites, Changchun Institute of Applied ChemistryChinese Academy of Sciences Changchun 130022 People's Republic of China
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25
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Morlot M, Gourand F, Perrio C. Deoxyradiofluorination Reaction from β-Hydroxy-α-aminoesters: an Entry to [ 18
F]Fluoroaminoesters under Mild Conditions. European J Org Chem 2019. [DOI: 10.1002/ejoc.201900300] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Marine Morlot
- Normandie Univ, UNICAEN, CEA, CNRS, FRE2001-ISTCT, LDM-TEP, Cyceron; Boulevard Henri Becquerel 14000 Caen France
| | - Fabienne Gourand
- Normandie Univ, UNICAEN, CEA, CNRS, FRE2001-ISTCT, LDM-TEP, Cyceron; Boulevard Henri Becquerel 14000 Caen France
| | - Cécile Perrio
- Normandie Univ, UNICAEN, CEA, CNRS, FRE2001-ISTCT, LDM-TEP, Cyceron; Boulevard Henri Becquerel 14000 Caen France
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26
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Reddy MB, Anandhan R. Synthesis of (R)-2-benzylmorpholine employing catalytic stereospecific rearrangement of L-Phenylalaninol. LETT ORG CHEM 2019. [DOI: 10.2174/1570178615666181105110940] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
An efficient synthesis of (R)-2-benzylmorpholine has been accomplished starting from
L-phenylalaninol by employing stereospecific rearrangement of β-amino alcohol using catalytic
amount of (CF3CO)2O as a key step.
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Affiliation(s)
- Mandapati Bhargava Reddy
- Department of Organic Chemistry, University of Madras, Guindy campus, Chennai-600 025, Tamil Nadu, India
| | - Ramasamy Anandhan
- Department of Organic Chemistry, University of Madras, Guindy campus, Chennai-600 025, Tamil Nadu, India
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27
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Chen TT, Wang AE, Huang PQ. Chemoselective Synthesis of α-Amino-α-cyanophosphonates by Reductive Gem-Cyanation-Phosphonylation of Secondary Amides. Org Lett 2019; 21:3808-3812. [PMID: 31059269 DOI: 10.1021/acs.orglett.9b01257] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Abstract
A novel approach to α-amino-α-cyanophosphonates has been developed. The method features a Tf2O-mediated reductive geminal cyanation/phosphonylation of secondary amides. Mild reaction conditions, high bond-forming efficiency, inexpensive readily available starting materials, and good to excellent yields with wide functional group compatibility constitute the main advantages of this method. The protocol can be run on a gram scale.
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Affiliation(s)
| | - Ai-E Wang
- Department of Chemistry and Fujian Provincial Key Laboratory of Chemical Biology, College of Chemistry and Chemical Engineering , Xiamen University , Xiamen 361005 , Fujian , China.,State Key Laboratory of Applied Organic Chemistry Lanzhou University , Lanzhou 730000 , China
| | - Pei-Qiang Huang
- Department of Chemistry and Fujian Provincial Key Laboratory of Chemical Biology, College of Chemistry and Chemical Engineering , Xiamen University , Xiamen 361005 , Fujian , China.,State Key Laboratory of Applied Organic Chemistry Lanzhou University , Lanzhou 730000 , China
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28
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Lu Z, Bajwa BS, Okoromoba OE, Hammond GB, Xu B. Multifaceted Ion Exchange Resin-Supported Hydrogen Fluoride: A Path to Flow Hydrofluorination. GREEN CHEMISTRY : AN INTERNATIONAL JOURNAL AND GREEN CHEMISTRY RESOURCE : GC 2019; 21:2224-2228. [PMID: 31402845 PMCID: PMC6688644 DOI: 10.1039/c8gc03166e] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/24/2023]
Abstract
A solid anhydrous hydrogen fluoride equivalent was prepared by mixing HF gas with an inexpensive anion exchange resin (A26-HF, HF content 30% wt/wt).
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Affiliation(s)
- Zhichao Lu
- Dr. Z. Lu, Dr. O. E. Okoromoba, Prof. Gerald B. Hammond, Department of Chemistry, University of Louisville, Louisville, Kentucky 40292, USA
| | - Bhvandip S. Bajwa
- Mr. B. S. Bajwa Department of Chemistry, California State University, Fresno, California 93740, USA
| | - Otome E. Okoromoba
- Dr. Z. Lu, Dr. O. E. Okoromoba, Prof. Gerald B. Hammond, Department of Chemistry, University of Louisville, Louisville, Kentucky 40292, USA
| | - Gerald B. Hammond
- Dr. Z. Lu, Dr. O. E. Okoromoba, Prof. Gerald B. Hammond, Department of Chemistry, University of Louisville, Louisville, Kentucky 40292, USA
| | - Bo Xu
- Prof. Bo Xu, Key Laboratory of Science and Technology of Eco-Textiles, Ministry of Education, College of Chemistry, Chemical Engineering and Biotechnology, Donghua University, Shanghai 201620, China
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29
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Boydas EB, Tanriver G, D'hooghe M, Ha HJ, Van Speybroeck V, Catak S. Theoretical insight into the regioselective ring-expansions of bicyclic aziridinium ions. Org Biomol Chem 2019; 16:796-806. [PMID: 29323389 DOI: 10.1039/c7ob02253k] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
Abstract
Transient bicyclic aziridinium ions are known to undergo ring-expansion reactions, paving the way to functionalized nitrogen-containing heterocycles. In this study, the regioselectivity observed in the ring-expansion reactions of 1-azoniabicyclo[n.1.0]alkanes was investigated from a computational viewpoint to study the ring-expansion pathways of two bicyclic systems with different ring sizes. Moreover, several nucleophiles leading to different experimental results were investigated. The effect of solvation was taken into account using both explicit and implicit solvent models. This theoretical rationalization provides valuable insight into the observed regioselectivity and may be used as a predictive tool in future studies.
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Affiliation(s)
- Esma B Boydas
- Bogazici University, Department of Chemistry, Bebek, 34342 Istanbul, Turkey.
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30
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Cherni E, Essalah K, Besbes N, Abderrabba M, Ayadi S. Theoretical investigation of the regioselective ring opening of 2-methylaziridine. Lewis acid effect. J Mol Model 2018; 24:309. [PMID: 30302573 DOI: 10.1007/s00894-018-3833-2] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/16/2018] [Accepted: 09/14/2018] [Indexed: 02/07/2023]
Abstract
The formation of substituted 1,2-diamines via the regiospecific nucleophilic ring opening of 2-methylaziridine with methylamine was performed by nucleophilic attack at aziridine carbon atoms. A detailed theoretical study was investigated by density functional theory (DFT) at the B3LYP level and second order Moller Plesset perturbation theory (MP2) by using the 6-311G(d,p) basis set. The third Grimme correction term (D3) was used to take into account weak interactions. Solvent effects were computed in methanol and dimethylsulfoxide using the polarizable continuum model (PCM). Emphasis was placed on the ring opening mechanisms of neutral aziridines and aziridinium ions obtained through N-complexation with the BF3 Lewis acid. Moreover, the effect of substituent groups on the regioselectivity of the ring opening was investigated. The nucleophilic attack was carried out via two pathways (frontside attack M1 and backside attack M2) where activation barriers proved the preference for ring opening through the backside attack at the C3 aziridine carbon atom. The obtained results showed that the frontside attack with methylamine takes place along a concerted mechanism that leads to formation of products through one transition state. However, the backside attack is carried via a stepwise process in which the methylamine attack takes place in an SN2 fashion where the leaving group is the ring nitrogen. It first conduces a ring opening considered as the rate-determining step followed by formation of a zwitterionic intermediate. This latter undergoes a rotation to allow the proton transfer step and finally leads to formation of the thermodynamic products.
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Affiliation(s)
- Emna Cherni
- Université de Tunis El Manar, Faculté des Sciences de Tunis, Campus Universitaire Farhat Hached d'El Manar - B.P. 94 Cité Rommana, 1068, Tunis, Tunisie. .,Université de Carthage, LR11ES22, Laboratoire Matériaux Molécules et Applications (LMMA), IPEST, BP51, La Marsa, 2070, Tunisie.
| | - Khaled Essalah
- Université de Tunis El Manar, Unité de Recherche en Sciences Fondamentales et Didactiques- Equipe de chimie théorique et réactivité, (UR14ES10) IPEI El Manar, Tunis, Tunisie
| | - Néji Besbes
- Laboratoire Matériaux Composites et Minéraux Argileux - Groupe de Chimie Organique Verte et Appliquée (LMCMA), Centre National de Recherches en Sciences des Matériaux, Technopole Borj Cédria, Soliman, 8027, Tunisie
| | - Manef Abderrabba
- Université de Carthage, LR11ES22, Laboratoire Matériaux Molécules et Applications (LMMA), IPEST, BP51, La Marsa, 2070, Tunisie
| | - Sameh Ayadi
- Université de Carthage, LR11ES22, Laboratoire Matériaux Molécules et Applications (LMMA), IPEST, BP51, La Marsa, 2070, Tunisie.,Institut National des Sciences et Technologies de la Mer (INSTM), Laboratoire Milieu Marin, Centre la Goulette, La Goulette, Tunisie
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31
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Neouchy Z, Gomez Pardo D, Cossy J. Synthesis of Optically Active α-Trifluoromethylamines by Rearrangement of β-Amino-α-trifluoromethyl Alcohols. Org Lett 2018; 20:6017-6021. [PMID: 30216084 DOI: 10.1021/acs.orglett.8b02353] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
The synthesis of various optically active α-trifluoromethylamines has been realized from β-amino-α-trifluoromethyl alcohols via an aziridinium ion intermediate under kinetic conditions.
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Affiliation(s)
- Zeina Neouchy
- Laboratoire de Chimie Organique, Institute of Chemistry, Biology and Innovation (CBI) , ESPCI Paris/CNRS/PSL University , 10 rue Vauquelin , 75231 Cedex 05 Paris , France
| | - Domingo Gomez Pardo
- Laboratoire de Chimie Organique, Institute of Chemistry, Biology and Innovation (CBI) , ESPCI Paris/CNRS/PSL University , 10 rue Vauquelin , 75231 Cedex 05 Paris , France
| | - Janine Cossy
- Laboratoire de Chimie Organique, Institute of Chemistry, Biology and Innovation (CBI) , ESPCI Paris/CNRS/PSL University , 10 rue Vauquelin , 75231 Cedex 05 Paris , France
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32
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Kalshetti MG, Argade NP. Regioselective and Stereoselective Reductive Aziridinium Ring Cleavage Leading to Azabicyclodecane Architecture: Enantioselective Synthesis of (+)-Subincanadine F. J Org Chem 2018; 83:12164-12170. [DOI: 10.1021/acs.joc.8b02113] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Affiliation(s)
- Manojkumar G. Kalshetti
- Division of Organic Chemistry, National Chemical Laboratory (CSIR), Pune 411 008, India
- Academy of Scientific and Innovative Research (AcSIR), New Delhi 110 025, India
| | - Narshinha P. Argade
- Division of Organic Chemistry, National Chemical Laboratory (CSIR), Pune 411 008, India
- Academy of Scientific and Innovative Research (AcSIR), New Delhi 110 025, India
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33
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Yadav NN, Ha HJ. Preparation of Stable Bicyclic Aziridinium Ions and Their Ring-Opening for the Synthesis of Azaheterocycles. J Vis Exp 2018. [PMID: 30199042 DOI: 10.3791/57572] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/31/2022] Open
Abstract
Bicyclic aziridinium ions were generated by the removal of an appropriate leaving group through internal nucleophilic attack by nitrogen atom in the aziridine ring. The utility of bicyclic aziridinium ions, specifically 1-azoniabicyclo[3.1.0]hexane and 1-azoniabicyclo[4.1.0]heptane tosylate highlighted in the aziridine ring openings by the nucleophile with the release of the ring strain to yield the corresponding ring-expanded azaheterocycles such as pyrrolidine, piperidine and azepane with diverse substituents on the ring in regio- and stereospecific manner. Herein, we report a simple and convenient method for the preparation of the stable 1-azabicyclo[4.1.0]heptane tosylate followed by selective ring opening via a nucleophilic attack either at the bridge or at the bridgehead carbon to yield piperidine and azepane rings, respectively. This synthetic strategy allowed us to prepare biologically active natural products containing piperidine and azepane motif including sedamine, allosedamine, fagomine and balanol in highly efficient manner.
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Affiliation(s)
- Nagendra Nath Yadav
- Department of Chemistry, North Eastern Regional Institute of Science and Technology
| | - Hyun-Joon Ha
- Department of Chemistry, Hankuk University of Foreign Studies;
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34
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Fontelle N, Yamamoto A, Arda A, Jiménez-Barbero J, Kato A, Désiré J, Blériot Y. 2-Acetamido-2-deoxy-l-iminosugarC-Alkyl andC-Aryl Glycosides: Synthesis and Glycosidase Inhibition. European J Org Chem 2018. [DOI: 10.1002/ejoc.201800678] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
Affiliation(s)
- Nathalie Fontelle
- IC2MP-UMR CNRS 7285; Université de Poitiers; Equipe “Synthèse Organique”; Université de Poitiers; 4 rue Michel Brunet 86073 Poitiers cedex 9 France
| | - Arisa Yamamoto
- Department of Hospital Pharmacy; University of Toyama; 2630 Sugitani 930-0194 Toyama Japan
| | - Ana Arda
- Parque Tecnológico de Bizkaia; CIC bioGUNE; Edif. 801A-1° 48160 Derio-Bizkaia Spain
| | | | - Atsushi Kato
- Department of Hospital Pharmacy; University of Toyama; 2630 Sugitani 930-0194 Toyama Japan
| | - Jérôme Désiré
- IC2MP-UMR CNRS 7285; Université de Poitiers; Equipe “Synthèse Organique”; Université de Poitiers; 4 rue Michel Brunet 86073 Poitiers cedex 9 France
| | - Yves Blériot
- IC2MP-UMR CNRS 7285; Université de Poitiers; Equipe “Synthèse Organique”; Université de Poitiers; 4 rue Michel Brunet 86073 Poitiers cedex 9 France
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35
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Powell WC, Walczak MA. Asymmetric Synthesis of Chiral 1,2-Amino Alcohols and Morpholin-2-ones from Arylglyoxals. J Org Chem 2018; 83:10487-10500. [PMID: 30039699 DOI: 10.1021/acs.joc.8b01516] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
Chiral 1,2-amino alcohols are privileged scaffolds with important applications as drug candidates and chiral ligands. Although various methods for the preparation of this structural motif have been reported, these methods are limited because of the use of precious metals and ligands. Here, we report a practical and high yielding synthesis of chiral 1,2-amino alcohols using arylglyoxals and pseudoephedrine auxiliary. This reaction is catalyzed by a Brønsted acid and provides morpholinone products in high yields and selectivities. The morpholine ring was converted into 1,2-amino alcohols in a two-step protocol.
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Affiliation(s)
- Wyatt C Powell
- Department of Chemistry and Biochemistry , University of Colorado , Boulder , Colorado 80309 , United States
| | - Maciej A Walczak
- Department of Chemistry and Biochemistry , University of Colorado , Boulder , Colorado 80309 , United States
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36
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Kaczmarek P, Rapp M, Koroniak H. Pyrrolidine and oxazolidine ring transformations in proline and serine derivatives of α-hydroxyphosphonates induced by deoxyfluorinating reagents. RSC Adv 2018; 8:24444-24457. [PMID: 35539185 PMCID: PMC9082089 DOI: 10.1039/c8ra05186k] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/16/2018] [Accepted: 06/30/2018] [Indexed: 11/21/2022] Open
Abstract
Transformations of α-hydroxyphosphonates derived from proline or serine by treatment with different deoxyfluorinating reagents (DAST, Deoxofluor, PyFluor) are reported. Depending on the applied reagent, as well as the protecting group used (N-Cbz, N-Boc, N-Bn) different types of products are observed. The reaction of N-Cbz or N-Boc prolinols with DAST or Deoxofluor due to aziridinium intermediate participation gave fluorinated amino phosphonates such as piperidine and pyrrolidine derivatives and/or oxazolidine-2-ones. Similarly, the analogous reaction of N-Cbz or N-Boc protected serinol yielded oxazolidine-2-ones or its fluorinated analogues. As the second type of product formed by DAST-induced reaction of serine derivatives, aziridines were obtained. Only in the case of deoxyfluorination of N-benzyl prolinols were both diastereoisomers of β-fluoropiperidine-α-phosphonates formed, while the reaction of protected N-benzyl serinols gave fluorinated oxazolidines. Moreover, application of PyFluor gave sulfonate derivatives. Diastereoselective reactions of hydroxyphosphonates from proline or serine with fluorinating agents yielding piperidine-, oxazolidine-, aziridine- or sulfonate phosphonates were reported.![]()
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Affiliation(s)
- Patrycja Kaczmarek
- Faculty of Chemistry, Adam Mickiewicz University in Poznań Umultowska 89b 61-614 Poznań Poland
| | - Magdalena Rapp
- Faculty of Chemistry, Adam Mickiewicz University in Poznań Umultowska 89b 61-614 Poznań Poland
| | - Henryk Koroniak
- Faculty of Chemistry, Adam Mickiewicz University in Poznań Umultowska 89b 61-614 Poznań Poland
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37
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Kaźmierczak M, Kubicki M, Koroniak H. Regioselective Fluorination of α-Hydroxy-β-aminophosphonates by Using PyFluor. European J Org Chem 2018. [DOI: 10.1002/ejoc.201800631] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
Affiliation(s)
- Marcin Kaźmierczak
- Faculty of Chemistry; Adam Mickiewicz University in Poznań; Umultowska 89b 61-614 Poznań Poland
- Centre for Advanced Technologies; Adam Mickiewicz University in Poznań; Umultowska 89c 61-614 Poznań Poland
| | - Maciej Kubicki
- Faculty of Chemistry; Adam Mickiewicz University in Poznań; Umultowska 89b 61-614 Poznań Poland
| | - Henryk Koroniak
- Faculty of Chemistry; Adam Mickiewicz University in Poznań; Umultowska 89b 61-614 Poznań Poland
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38
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Xia Q, Tian H, Dong J, Qu Y, Li L, Song H, Liu Y, Wang Q. N
-Arylamines Coupled with Aldehydes, Ketones, and Imines by Means of Photocatalytic Proton-Coupled Electron Transfer. Chemistry 2018; 24:9269-9273. [DOI: 10.1002/chem.201801886] [Citation(s) in RCA: 26] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/17/2018] [Revised: 05/14/2018] [Indexed: 12/15/2022]
Affiliation(s)
- Qing Xia
- State Key Laboratory of Elemento-Organic Chemistry; Research Institute of Elemento-Organic Chemistry; College of Chemistry; Nankai University; Tianjin 300071 P. R. China
| | - Hao Tian
- State Key Laboratory of Elemento-Organic Chemistry; Research Institute of Elemento-Organic Chemistry; College of Chemistry; Nankai University; Tianjin 300071 P. R. China
| | - Jianyang Dong
- State Key Laboratory of Elemento-Organic Chemistry; Research Institute of Elemento-Organic Chemistry; College of Chemistry; Nankai University; Tianjin 300071 P. R. China
| | - Yi Qu
- State Key Laboratory of Elemento-Organic Chemistry; Research Institute of Elemento-Organic Chemistry; College of Chemistry; Nankai University; Tianjin 300071 P. R. China
| | - Lili Li
- State Key Laboratory of Elemento-Organic Chemistry; Research Institute of Elemento-Organic Chemistry; College of Chemistry; Nankai University; Tianjin 300071 P. R. China
| | - Hongjian Song
- State Key Laboratory of Elemento-Organic Chemistry; Research Institute of Elemento-Organic Chemistry; College of Chemistry; Nankai University; Tianjin 300071 P. R. China
| | - Yuxiu Liu
- State Key Laboratory of Elemento-Organic Chemistry; Research Institute of Elemento-Organic Chemistry; College of Chemistry; Nankai University; Tianjin 300071 P. R. China
| | - Qingmin Wang
- State Key Laboratory of Elemento-Organic Chemistry; Research Institute of Elemento-Organic Chemistry; College of Chemistry; Nankai University; Tianjin 300071 P. R. China
- Collaborative Innovation Center of Chemical Science and Engineering; Tianjin 300071 P. R. China
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39
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Wang T, Daniliuc CG, Mück-Lichtenfeld C, Kehr G, Erker G. Formation of Reactive π-Conjugated Frustrated N/B Pairs by Borane-Induced Propargyl Amine Rearrangement. J Am Chem Soc 2018; 140:3635-3643. [PMID: 29444567 DOI: 10.1021/jacs.7b11958] [Citation(s) in RCA: 25] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
N-Propargyltetramethylpiperidine reacts with a series of trans-alkenyl-B(C6F5)2 compounds to give the substituted alkenyl-bridged frustrated N/B Lewis pairs 5. Their structures and spectroscopic features indicate a pronounced participation of the mesomeric s-trans-iminium/borata-alkene resonance form. The compounds are thought to be formed in a stepwise addition/rearrangement process which is initiated by a trans-1,2-amine/borane FLP addition to the carbon-carbon triple bond to generate a reactive zwitterionic aziridinium/alkenylborate intermediate. Subsequent alkenylborate attack leads to opening of the activated three-membered heterocycle with clean formation of the products 5a-c. Treatment of the propargyl-TMP substrate with B(C6F5)3 gave a stable example of such an aziridinium/borate betaine, which was isolated and amply characterized. The products 5a-c are active N/B FLPs. They split dihydrogen heterolytically under mild conditions to give the respective NH+/BH- products 9a-c. These contain Z-configurated core C═C double bonds, which indicates rotational equilibration around the central C-C bond of 5a-c during this reaction. Structural and chemical features of the 5c system were analyzed by DFT calculations.
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Affiliation(s)
- Tongdao Wang
- Organisch-Chemisches Institut , Westfälische Wilhelms-Universität Münster , Corrensstraße 40 , 48149 Münster , Germany
| | - Constantin G Daniliuc
- Organisch-Chemisches Institut , Westfälische Wilhelms-Universität Münster , Corrensstraße 40 , 48149 Münster , Germany
| | - Christian Mück-Lichtenfeld
- Organisch-Chemisches Institut , Westfälische Wilhelms-Universität Münster , Corrensstraße 40 , 48149 Münster , Germany
| | - Gerald Kehr
- Organisch-Chemisches Institut , Westfälische Wilhelms-Universität Münster , Corrensstraße 40 , 48149 Münster , Germany
| | - Gerhard Erker
- Organisch-Chemisches Institut , Westfälische Wilhelms-Universität Münster , Corrensstraße 40 , 48149 Münster , Germany
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40
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Dual catalysis for enantioselective convergent synthesis of enantiopure vicinal amino alcohols. Nat Commun 2018; 9:410. [PMID: 29379007 PMCID: PMC5789022 DOI: 10.1038/s41467-017-02698-4] [Citation(s) in RCA: 74] [Impact Index Per Article: 12.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/20/2017] [Accepted: 12/13/2017] [Indexed: 12/13/2022] Open
Abstract
Enantiopure vicinal amino alcohols and derivatives are essential structural motifs in natural products and pharmaceutically active molecules, and serve as main chiral sources in asymmetric synthesis. Currently known asymmetric catalytic protocols for this class of compounds are still rare and often suffer from limited scope of substrates, relatively low regio- or stereoselectivities, thus prompting the development of more effective methodologies. Herein we report a dual catalytic strategy for the convergent enantioselective synthesis of vicinal amino alcohols. The method features a radical-type Zimmerman–Traxler transition state formed from a rare earth metal with a nitrone and an aromatic ketyl radical in the presence of chiral N,N′-dioxide ligands. In addition to high level of enantio- and diastereoselectivities, our synthetic protocol affords advantages of simple operation, mild conditions, high-yielding, and a broad scope of substrates. Furthermore, this protocol has been successfully applied to the concise synthesis of pharmaceutically valuable compounds (e.g., ephedrine and selegiline). Chiral vicinal amino alcohols are found in many bioactive compounds and may serve as chiral ligands. Here, the authors report a photocatalytic enantioselective cross-coupling of nitrones with aromatic aldehydes with a chiral ligand-coordinated rare earth ion synergistically producing enantiopure vicinal amino alcohols.
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41
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Okoromoba OE, Li Z, Robertson N, Mashuta MS, Couto UR, Tormena CF, Xu B, Hammond GB. Achieving regio- and stereo-control in the fluorination of aziridines under acidic conditions. Chem Commun (Camb) 2018; 52:13353-13356. [PMID: 27782265 DOI: 10.1039/c6cc07855a] [Citation(s) in RCA: 33] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
We developed an efficient fluorination protocol that converts easily accessible aziridines into β-fluoroamines, which are important motifs in biologically active molecules. In contrast with traditional fluorination approaches, DMPU-HF has shown both higher reactivity and regioselectivity and good functional group tolerance; thus, a wide scope of β-fluoroamines can now be accessed conveniently. The stereochemical behavior of the ring opening depends on the substitution pattern of the aziridine substrate.
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Affiliation(s)
- Otome E Okoromoba
- Department of Chemistry, University of Louisville, Louisville, KY 40292, USA.
| | - Zhou Li
- Department of Chemistry, University of Louisville, Louisville, KY 40292, USA.
| | - Nicole Robertson
- Department of Chemistry, University of Louisville, Louisville, KY 40292, USA.
| | - Mark S Mashuta
- Department of Chemistry, University of Louisville, Louisville, KY 40292, USA.
| | - Uenifer R Couto
- Institute of Chemistry, University of Campinas, São Paulo 13083-970, Brazil.
| | - Cláudio F Tormena
- Institute of Chemistry, University of Campinas, São Paulo 13083-970, Brazil.
| | - Bo Xu
- College of Chemistry, Chemical Engineering and Biotechnology, Donghua University, 2999 North Renmin Lu, Shanghai 201620, China.
| | - Gerald B Hammond
- Department of Chemistry, University of Louisville, Louisville, KY 40292, USA.
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42
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R. Juárez J, Hernández U, Velasco M, Vázquez J, L. Terán J, Gnecco D, L. Orea M, M. Aparicio D. Highly Regioselective Ring Opening of a Common N,N-Dialkylaziridinium Ion by Carboxylic Acids. HETEROCYCLES 2018. [DOI: 10.3987/com-17-13770] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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43
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Aricò F, Aldoshin AS, Musolino M, Crisma M, Tundo P. β-Aminocarbonates in Regioselective and Ring Expansion Reactions. J Org Chem 2017; 83:236-243. [PMID: 29172495 DOI: 10.1021/acs.joc.7b02609] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
The reactivity of β-aminocarbonates as anisotropic electrophiles has been investigated with several phenols. Products distribution shows that the regioselectivity of the anchimerically driven alkylation reaction depends on the nucleophiles. The results suggest that in the presence of nucleophiles that are also good leaving groups, the reaction takes place under thermodynamic control favoring the attack on the most sterically hindered carbon of the cyclic aziridinium intermediate. Furthermore, when an enantiomerically pure pyrrolidine-based carbonate was used, the reaction with phenols proceeds via a bicyclic aziridinium intermediate leading to the stereoselective synthesis of optically active 3-substituted piperidines via ring expansion reaction. These results were confirmed both by NMR spectroscopy and X-ray diffraction analysis.
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Affiliation(s)
- Fabio Aricò
- Department of Environmental Sciences, Informatics and Statistics, Ca' Foscari University , Scientific Campus Via Torino 155, 30170 Venezia Mestre, Italy
| | - Alexander S Aldoshin
- Department of Environmental Sciences, Informatics and Statistics, Ca' Foscari University , Scientific Campus Via Torino 155, 30170 Venezia Mestre, Italy
| | - Manuele Musolino
- Department of Environmental Sciences, Informatics and Statistics, Ca' Foscari University , Scientific Campus Via Torino 155, 30170 Venezia Mestre, Italy
| | - Marco Crisma
- Institute of Biomolecular Chemistry , Padova Unit, CNR, 35131 Padova, Italy
| | - Pietro Tundo
- Department of Environmental Sciences, Informatics and Statistics, Ca' Foscari University , Scientific Campus Via Torino 155, 30170 Venezia Mestre, Italy
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44
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Yadav N, Jeong H, Ha HJ. Atom-Economical and Metal-Free Synthesis of Multisubstituted Furans from Intramolecular Aziridine Ring Opening. ACS OMEGA 2017; 2:7525-7531. [PMID: 31457314 PMCID: PMC6645301 DOI: 10.1021/acsomega.7b01542] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 10/13/2017] [Accepted: 10/24/2017] [Indexed: 06/10/2023]
Abstract
Multisubstituted furans were prepared from dialkyl 2-(aziridin-2-ylmethylene)malonate and/or 1,3-dione through aziridine ring opening by the internal carbonyl oxygen with the assistance of BF3·OEt2, followed by aromatization. This synthetic method is free from any metal and is atom-economical with all of the atoms in the starting material retained in the final product.
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Affiliation(s)
- Nagendra
Nath Yadav
- Department
of Chemistry, North Eastern Regional Institute
of Science and Technology, Nirjuli, Arunachal Pradesh 791109, India
| | - Hyeonsu Jeong
- Department
of Chemistry, Hankuk University of Foreign
Studies, Yongin 17035, Korea
| | - Hyun-Joon Ha
- Department
of Chemistry, Hankuk University of Foreign
Studies, Yongin 17035, Korea
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45
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Piperidines from acid-catalysed cyclisations: Pitfalls, solutions and a new ring contraction to pyrrolidines. Tetrahedron Lett 2017. [DOI: 10.1016/j.tetlet.2017.07.058] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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46
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Fedoseev SV, Belikov MY, Ershov OV, Tafeenko VA. Iminothiolactone-thiolactam rearrangement in the synthesis of 4-amino-6-thioxo-3,7,9-triazatricyclo-[6.2.1.01,5]undec-4-ene-2,10-diones. Chem Heterocycl Compd (N Y) 2017. [DOI: 10.1007/s10593-017-2167-9] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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47
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Choi J, Yadav NN, Ha HJ. Preparation of a Stable Bicyclic Aziridinium Ion and Its Ring Expansion toward Piperidines and Azepanes. ASIAN J ORG CHEM 2017. [DOI: 10.1002/ajoc.201700080] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Jieun Choi
- Department of Chemistry; Hankuk University of Foreign Studies; Yongin 17035 Korea
| | - Nagendra Nath Yadav
- Department of Chemistry; North Eastern Regional Institute of Science and Technology, Nirjuli; Arunachal Pradesh 791109 India
| | - Hyun-Joon Ha
- Department of Chemistry; Hankuk University of Foreign Studies; Yongin 17035 Korea
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48
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Chang L, Guo T, Wang Z, Wang S, Yao ZJ. Azepinoindole Synthesis via a N-Bromosuccinimide-Induced Cycloisomerization of Enaminoester/Enaminone. J Org Chem 2017; 82:1567-1574. [DOI: 10.1021/acs.joc.6b02760] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
Affiliation(s)
- Lina Chang
- State
Key Laboratory of Coordination Chemistry, School of Chemistry and
Chemical Engineering, Nanjing University, Nanjing 210023, People’s Republic of China
| | - Tao Guo
- State
Key Laboratory of Coordination Chemistry, School of Chemistry and
Chemical Engineering, Nanjing University, Nanjing 210023, People’s Republic of China
| | - Ziyi Wang
- Nanjing Foreign Language School, Nanjing 210008, People’s Republic of China
| | - Shaozhong Wang
- State
Key Laboratory of Coordination Chemistry, School of Chemistry and
Chemical Engineering, Nanjing University, Nanjing 210023, People’s Republic of China
| | - Zhu-Jun Yao
- State
Key Laboratory of Coordination Chemistry, School of Chemistry and
Chemical Engineering, Nanjing University, Nanjing 210023, People’s Republic of China
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49
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Chinthapally K, Karthik R, Senthilkumar S, Baskaran S. A Short and Efficient Synthesis of Iminosugar 2-Acyl Indolizidine. Chemistry 2016; 23:533-536. [DOI: 10.1002/chem.201604376] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/15/2016] [Indexed: 12/24/2022]
Affiliation(s)
- Kiran Chinthapally
- Department of Chemistry; Indian Institute of Technology Madras; Chennai 600036 India
| | - Reshamina Karthik
- Department of Chemistry; Indian Institute of Technology Madras; Chennai 600036 India
| | | | - Sundarababu Baskaran
- Department of Chemistry; Indian Institute of Technology Madras; Chennai 600036 India
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50
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Dolfen J, Yadav NN, De Kimpe N, D'hooghe M, Ha HJ. Bicyclic Aziridinium Ions in Azaheterocyclic Chemistry - Preparation and Synthetic Application of 1-Azoniabicyclo[n.1.0]alkanes. Adv Synth Catal 2016. [DOI: 10.1002/adsc.201600750] [Citation(s) in RCA: 35] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Jeroen Dolfen
- SynBioC Research Group, Department of Sustainable Organic Chemistry and Technology, Faculty of Bioscience Engineering; Ghent University; Coupure Links 653 B-9000 Ghent Belgium
| | - Nagendra Nath Yadav
- Department of Chemistry; Hankuk University of Foreign Studies; Yongin 449-791 Korea
| | - Norbert De Kimpe
- SynBioC Research Group, Department of Sustainable Organic Chemistry and Technology, Faculty of Bioscience Engineering; Ghent University; Coupure Links 653 B-9000 Ghent Belgium
| | - Matthias D'hooghe
- SynBioC Research Group, Department of Sustainable Organic Chemistry and Technology, Faculty of Bioscience Engineering; Ghent University; Coupure Links 653 B-9000 Ghent Belgium
| | - Hyun-Joon Ha
- Department of Chemistry; Hankuk University of Foreign Studies; Yongin 449-791 Korea
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