1
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Ni Y, Wang Y, Liu J, Mao Y, Pan Y, Ni S, Yan L, Wang Y. Redox-Active α-Amino-CF 3 Reagents: Developing and Applications in Ni-Catalyzed Reductive Cross-Coupling. Org Lett 2024. [PMID: 39177147 DOI: 10.1021/acs.orglett.4c02730] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 08/24/2024]
Abstract
α-Amino-CF3 compounds are widely employed in bio- and pharmaceutical chemistry for improved stability and bioactivities. Traditional methods often face challenges with functional group tolerance and lack a general approach for late-stage functionalization. Herein, we report a new type of redox-active α-amino-CF3 reagents, easily prepared from trifluoro acetaldehyde hydrates. These α-amino-CF3 reagents can serve as versatile building blocks for coupling with alkynyl bromides, aryl bromides, and enol triflates under nickel catalysis.
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Affiliation(s)
- Yifan Ni
- State Key Laboratory of Coordination Chemistry, MOE Key Laboratory of High Performance Polymer Materials and Technology, Jiangsu Key Laboratory of Advanced Organic Materials, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210023, China
| | - Ying Wang
- School of Basic Medicine, Wannan Medical College, Wuhu 241000, China
| | - Jiyang Liu
- State Key Laboratory of Coordination Chemistry, MOE Key Laboratory of High Performance Polymer Materials and Technology, Jiangsu Key Laboratory of Advanced Organic Materials, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210023, China
| | - Yu Mao
- State Key Laboratory of Coordination Chemistry, MOE Key Laboratory of High Performance Polymer Materials and Technology, Jiangsu Key Laboratory of Advanced Organic Materials, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210023, China
| | - Yi Pan
- State Key Laboratory of Coordination Chemistry, MOE Key Laboratory of High Performance Polymer Materials and Technology, Jiangsu Key Laboratory of Advanced Organic Materials, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210023, China
| | - Shengyang Ni
- State Key Laboratory of Coordination Chemistry, MOE Key Laboratory of High Performance Polymer Materials and Technology, Jiangsu Key Laboratory of Advanced Organic Materials, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210023, China
| | - Liang Yan
- School of Basic Medicine, Wannan Medical College, Wuhu 241000, China
| | - Yi Wang
- State Key Laboratory of Coordination Chemistry, MOE Key Laboratory of High Performance Polymer Materials and Technology, Jiangsu Key Laboratory of Advanced Organic Materials, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210023, China
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2
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Manna K, Kumar R, Sundaresan A, Natarajan S. Fixing CO 2 under Atmospheric Conditions and Dual Functional Heterogeneous Catalysis Employing Cu MOFs: Polymorphism, Single-Crystal-to-Single-Crystal (SCSC) Transformation and Magnetic Studies. Inorg Chem 2023; 62:13738-13756. [PMID: 37586090 DOI: 10.1021/acs.inorgchem.3c01245] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 08/18/2023]
Abstract
New copper compounds, [Cu(C14H8O6)(C10H8N2)(H2O)] (1), [Cu(C14H8O6)(C10H8N2)(H2O)]·(C3H7ON)2 (2), [Cu(C14H8O6)(C10H8N2)(H2O)2]·(C3H7ON) (3), [Cu(C14H8O6)(C10H8N4)] (4), and [Cu(C14H8O6)(C10H8N4)]·(H2O) (5), were prepared employing 2,5-bis(prop-2-yn-1-yloxy)terephthalic acid (2,5-BPTA) as the primary ligand and 4,4'-bipyridine (1-3) and 4,4'-azopyridine (4-5) as the secondary ligands. Single-crystal studies indicated that compounds 1-4 have two-dimensional layer structures and compound 5 has a three-dimensional structure. Compounds 1-3 were isolated from the same reaction mixture but by varying the time of reaction. The framework structures of compounds 1-3 are similar and may be considered as polymorphic structures. Compounds 4 and 5 can also be considered polymorphic with a change in dimensionality of the structure. Compounds 1-3 can be formed through a single-crystal-to-single-crystal transformation under a suitable solvent mixture. The Cu center was explored for the Lewis acid-catalyzed cycloaddition reaction of epoxide and CO2 under ambient conditions in a solventless condition and also for the synthesis of propargylamine derivatives by three-component coupling reactions (A3 coupling) in a DCM medium. The Lewis basic functionality of the MOF (-N═N- group) has been explored for the Henry reaction (aldol condensation) in a solventless condition. In all of the catalytic reactions, good yields and recyclability were observed. The magnetic studies indicated that compounds 1 and 4 have antiferromagnetic interactions and compound 5 has ferromagnetic interactions. The present studies illustrated the rich diversity that the copper-containing compounds exhibit in extended framework structures.
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Affiliation(s)
- Krishna Manna
- Framework Solids Laboratory, Solid State and Structural Chemistry Unit Indian Institute of Science, Bangalore 560012, India
| | - Rahul Kumar
- School of Advanced Materials and Chemistry and Physics of Materials Unit, Jawaharlal Nehru Centre for Advanced Scientific Research, Bangalore 560064, India
| | - Athinarayanan Sundaresan
- School of Advanced Materials and Chemistry and Physics of Materials Unit, Jawaharlal Nehru Centre for Advanced Scientific Research, Bangalore 560064, India
| | - Srinivasan Natarajan
- Framework Solids Laboratory, Solid State and Structural Chemistry Unit Indian Institute of Science, Bangalore 560012, India
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3
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Piranloo FG, Abharian MK, Kavousi F, Luque R. Copper nanoparticles decorated on boron nitride nanoflakes as an efficient catalyst for the synthesis of propargylamines under green conditions. MOLECULAR CATALYSIS 2022. [DOI: 10.1016/j.mcat.2022.112687] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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4
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Rao MN, Manne R, Tanski JM, Butcher R, Ghosh P. One pot synthesis of propargylamines by three component amine-aldehyde-acetylene (A3) coupling catalyzed by neutral Ag(I) and Au(I) and cationic Pd(II) and Ni(II) complexes of a pincer N-heterocyclic carbene. MOLECULAR CATALYSIS 2022. [DOI: 10.1016/j.mcat.2022.112515] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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5
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Highly efficient, iodide catalysed propargylamines synthesis via A3 coupling reaction. RESULTS IN CHEMISTRY 2022. [DOI: 10.1016/j.rechem.2021.100279] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
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6
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Ramirez NP, Pisella G, Waser J. Cu(I)-Catalyzed gem-Aminoalkynylation of Diazo Compounds: Synthesis of Fluorinated Propargylic Amines. J Org Chem 2021; 86:10928-10938. [PMID: 34260244 DOI: 10.1021/acs.joc.1c01423] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
The gem-aminoalkynylation of fluorinated diazo compounds catalyzed by a simple Cu(I) salt is described. This three-component reaction allows the synthesis of propargylic amines with broad functional group tolerance. Both electron-rich and electron-poor anilines can be used as nucleophiles and alkyl-, aryl-, and silyl-substituted EthynylBenziodoXoles (EBX) as electrophiles.
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Affiliation(s)
- Nieves P Ramirez
- Laboratory of Catalysis and Organic Synthesis, Institute of Chemical Sciences and Engineering, Ecole Polytechnique Fédérale de Lausanne, CH-1015 Lausanne, Switzerland
| | - Guillaume Pisella
- Laboratory of Catalysis and Organic Synthesis, Institute of Chemical Sciences and Engineering, Ecole Polytechnique Fédérale de Lausanne, CH-1015 Lausanne, Switzerland
| | - Jerome Waser
- Laboratory of Catalysis and Organic Synthesis, Institute of Chemical Sciences and Engineering, Ecole Polytechnique Fédérale de Lausanne, CH-1015 Lausanne, Switzerland
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7
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John SE, Gulati S, Shankaraiah N. Recent advances in multi-component reactions and their mechanistic insights: a triennium review. Org Chem Front 2021. [DOI: 10.1039/d0qo01480j] [Citation(s) in RCA: 49] [Impact Index Per Article: 16.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
This review summarizes the recent developments in MCRs, incorporating different strategies along with their mechanistic aspects.
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Affiliation(s)
- Stephy Elza John
- Department of Medicinal Chemistry
- National Institute of Pharmaceutical Education and Research (NIPER)
- Hyderabad – 500 037
- India
| | - Shivani Gulati
- Department of Medicinal Chemistry
- National Institute of Pharmaceutical Education and Research (NIPER)
- Hyderabad – 500 037
- India
| | - Nagula Shankaraiah
- Department of Medicinal Chemistry
- National Institute of Pharmaceutical Education and Research (NIPER)
- Hyderabad – 500 037
- India
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8
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Schneider T, Keim M, Seitz B, Maas G. Reactions of 3-aryl-1-(trifluoromethyl)prop-2-yn-1-iminium salts with 1,3-dienes and styrenes. Beilstein J Org Chem 2020; 16:2064-2072. [PMID: 32952722 PMCID: PMC7476585 DOI: 10.3762/bjoc.16.173] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/29/2020] [Accepted: 08/10/2020] [Indexed: 11/24/2022] Open
Abstract
3-Aryl-1-(trifluoromethyl)prop-2-yn-1-iminium triflate salts represent a novel, highly reactive class of acetylenic iminium salts. Herein we present several reactions which are based on the electron-poor acetylenic bond and on the high electrophilicity of the CF3-substituted iminium group. These salts were found to be highly reactive dienophiles in Diels–Alder reactions with cyclopentadiene, 2,3-dimethylbutadiene and even anthracene. At higher temperature, the cycloadducts undergo an intramolecular SE(Ar) reaction leading to condensed carbocycles incorporating a 1-(trifluoromethyl)-1-(dimethylamine)indene ring system. With styrenes and some substituted styrenes, cascade reactions take place, which likely include cyclobutene and several cationic intermediates and mainly yield 2-(1-phenylvinyl)indenes. In a similar reaction cascade, a fulvene derivative was obtained with 1,4-diphenylbutadiene as the substrate.
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Affiliation(s)
- Thomas Schneider
- Institute of Organic Chemistry I, Ulm University, Albert-Einstein-Allee 11, D-89081 Ulm, Germany
| | - Michael Keim
- Institute of Organic Chemistry I, Ulm University, Albert-Einstein-Allee 11, D-89081 Ulm, Germany
| | - Bianca Seitz
- Institute of Organic Chemistry I, Ulm University, Albert-Einstein-Allee 11, D-89081 Ulm, Germany
| | - Gerhard Maas
- Institute of Organic Chemistry I, Ulm University, Albert-Einstein-Allee 11, D-89081 Ulm, Germany
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9
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Study on the A3-coupling reaction catalyzed by readily available copper-containing minerals. Synthesis of propargylamines. Tetrahedron Lett 2020. [DOI: 10.1016/j.tetlet.2019.151544] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
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10
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Veisi H, Mohammadi L, Hemmati S, Tamoradi T, Mohammadi P. In Situ Immobilized Silver Nanoparticles on Rubia tinctorum Extract-Coated Ultrasmall Iron Oxide Nanoparticles: An Efficient Nanocatalyst with Magnetic Recyclability for Synthesis of Propargylamines by A 3 Coupling Reaction. ACS OMEGA 2019; 4:13991-14003. [PMID: 31497717 PMCID: PMC6714602 DOI: 10.1021/acsomega.9b01720] [Citation(s) in RCA: 64] [Impact Index Per Article: 12.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/11/2019] [Accepted: 08/01/2019] [Indexed: 06/05/2023]
Abstract
This research suggests a green method for synthesizing hybrid magnetic nanocomposites that can be used as a reductant and a stabilizing agent for immobilizing metal nanoparticles (NPs). The central idea is the modification of magnetic NPs using Rubia tinctorum extract, which consists of numerous carbonyl and phenolic hydroxyl functional groups to increase adsorption of metals and chelate silver ions, and decrease the adsorption of silver ions by Ag NPs, in situ. Thus, the suggested catalyst preparation process does not require toxic reagents, additional reductants, and intricate instruments. To show the effectiveness of the plant extract in reducing and immobilizing Ag NPs, the structural, morphological, and physicochemical features of the particles are studied using Fourier-transform infrared spectroscopy, inductively coupled plasma atomic emission spectroscopy, field emission scanning electron microscopy, energy-dispersive X-ray spectroscopy, high-resolution transmission electron microscopy, vibrating sample magnetometry, X-ray diffraction analysis, and X-ray photoelectron spectroscopy. One of the advantages of the suggested method is to reduce the size of the magnetic NPs from 15-20 to 2-5 nm, in the presence of the extract. Additionally, the prepared Fe3O4@R. tinctorum/Ag nanocatalyst is demonstrated to exhibit a very high activity in the catalysis of the three-component reaction of aldehydes, amines, and alkynes (A3 coupling) with good to high yields of diverse propargylamines. Moreover, the nanocatalyst can be recovered several times with no considerable leaching or loss of performance.
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Affiliation(s)
- Hojat Veisi
- Department of Chemistry, Payame
Noor University, Tehran 19395-4697, Iran
| | - Lida Mohammadi
- Department of Chemistry, Payame
Noor University, Tehran 19395-4697, Iran
| | - Saba Hemmati
- Department of Chemistry, Payame
Noor University, Tehran 19395-4697, Iran
| | - Taiebeh Tamoradi
- Department of Chemistry, Payame
Noor University, Tehran 19395-4697, Iran
| | - Pourya Mohammadi
- Department of Chemistry, Payame
Noor University, Tehran 19395-4697, Iran
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11
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Saha S, Biswas K, Ghosh P, Basu B. New 1,2-dithioether based 2D copper(I) coordination polymer: from synthesis to catalytic application in A3-coupling reaction. J COORD CHEM 2019. [DOI: 10.1080/00958972.2019.1627339] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
Affiliation(s)
- Sankar Saha
- Department of Chemistry, North Bengal University, Darjeeling, India
| | - Kinkar Biswas
- Department of Chemistry, Raiganj University, Raiganj, India
| | - Pranab Ghosh
- Department of Chemistry, North Bengal University, Darjeeling, India
| | - Basudeb Basu
- Department of Chemistry, North Bengal University, Darjeeling, India
- Department of Chemistry, Raiganj University, Raiganj, India
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12
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Hekmati M. Application of Biosynthesized CuO Nanoparticles Using Rosa canina Fruit Extract as a Recyclable and Heterogeneous Nanocatalyst for Alkyne/Aldehyde/Amine A3 Coupling Reactions. Catal Letters 2019. [DOI: 10.1007/s10562-019-02833-4] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
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13
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Jesin I, Nandi GC. Recent Advances in the A3
Coupling Reactions and their Applications. European J Org Chem 2019. [DOI: 10.1002/ejoc.201900001] [Citation(s) in RCA: 70] [Impact Index Per Article: 14.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Affiliation(s)
- Irfana Jesin
- Department of Chemistry; National Institute of Technology; Tiruchirapalli Tamilnadu India
| | - Ganesh Chandra Nandi
- Department of Chemistry; National Institute of Technology; Tiruchirapalli Tamilnadu India
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14
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Veisi H, Farokhi M, Hamelian M, Hemmati S. Green synthesis of Au nanoparticles using an aqueous extract of Stachys lavandulifolia and their catalytic performance for alkyne/aldehyde/amine A 3 coupling reactions. RSC Adv 2018; 8:38186-38195. [PMID: 35559075 PMCID: PMC9089797 DOI: 10.1039/c8ra06819d] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/14/2018] [Accepted: 10/31/2018] [Indexed: 11/21/2022] Open
Abstract
High reaction rate and easy availability make green synthesis of metal nanoparticles noticeable. In the present study, gold nanoparticles with wide applications in different fields were synthesized by an ecofriendly method at room temperature using Stachys lavandulifolia extract as the reducing agent. Properties of the synthesized gold nanoparticles (GNP) were identified by different analytical techniques including: UV-Vis absorption spectroscopy verified presence of Au NPs in the solution while functional groups of its extract and synthesized Au NPs were determined by FT-IR. Its crystalline analysis with a fcc plane was verified by X-ray diffraction (XRD) and energy dispersive spectroscopy (EDS) determined elements in the sample. Surface morphology, diverse shapes and sizes of the Au NPs were shown by scanning electron microscopy (SEM), atomic force microscopy (AFM), and transmission electron microscopy (TEM). Beginning and end destruction temperatures of the Au/S. lavandulifolia NPs were determined by thermal gravimetric analysis (TGA). The Au nanoparticles were capped with extracts, preventing them from oxidation and agglomeration and were used as an efficient heterogeneous nanocatalyst for a three-component reaction of amines, aldehydes, and alkynes (A3 coupling). A diverse range of propargylamines were obtained in good yields. Furthermore, the separation and recycling of Au/S. lavandulifolia NPs was very simple, effective, and economical.
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Affiliation(s)
- Hojat Veisi
- Department of Chemistry, Payame Noor University Tehran Iran
| | | | - Mona Hamelian
- Research Center of Oils and Fats, Kermanshah University of Medical Sciences Kermanshah Iran
| | - Saba Hemmati
- Department of Chemistry, Payame Noor University Tehran Iran
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15
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Wu M, Zhao X, Liu Y, Cao S. Synthesis of difluoromethylated enynes by the reaction of α-(trifluoromethyl)styrenes with terminal alkynes. Org Biomol Chem 2018; 16:6909-6917. [PMID: 30225511 DOI: 10.1039/c8ob02117a] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
A novel and efficient method for the synthesis of difluoromethylated enynes by the reaction of α-(trifluoromethyl)styrenes with terminal alkynes with the assistance of NaOtBu was described. The mechanism of the reaction might involve the SN2' reaction of α-(trifluoromethyl)styrenes and a subsequent 1,3-H shift. Isomerization (E → Z) of 1-difluoromethyl-1,3-enynes in the presence of ZrCl4 was also developed.
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Affiliation(s)
- Mingsheng Wu
- Shanghai Key Laboratory of Chemical Biology, School of Pharmacy, East China University of Science and Technology (ECUST), Shanghai 200237, China.
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16
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Chen MW, Yang Q, Deng Z, Zhou Y, Ding Q, Peng Y. Organocatalytic Asymmetric Reduction of Fluorinated Alkynyl Ketimines. J Org Chem 2018; 83:8688-8694. [DOI: 10.1021/acs.joc.8b00873] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Mu-Wang Chen
- Key Laboratory of Small Functional Organic Molecule, Ministry of Education and College of Chemistry, Jiangxi Normal University, Nanchang, Jiangxi 330022, China
| | - Qin Yang
- Key Laboratory of Small Functional Organic Molecule, Ministry of Education and College of Chemistry, Jiangxi Normal University, Nanchang, Jiangxi 330022, China
- Jiangxi’s Key Laboratory of Green Chemistry, Jiangxi Normal University, Nanchang, Jiangxi 330022, China
| | - Zhihong Deng
- Key Laboratory of Small Functional Organic Molecule, Ministry of Education and College of Chemistry, Jiangxi Normal University, Nanchang, Jiangxi 330022, China
| | - Yirong Zhou
- Key Laboratory of Small Functional Organic Molecule, Ministry of Education and College of Chemistry, Jiangxi Normal University, Nanchang, Jiangxi 330022, China
| | - Qiuping Ding
- Key Laboratory of Small Functional Organic Molecule, Ministry of Education and College of Chemistry, Jiangxi Normal University, Nanchang, Jiangxi 330022, China
- Jiangxi’s Key Laboratory of Green Chemistry, Jiangxi Normal University, Nanchang, Jiangxi 330022, China
| | - Yiyuan Peng
- Key Laboratory of Small Functional Organic Molecule, Ministry of Education and College of Chemistry, Jiangxi Normal University, Nanchang, Jiangxi 330022, China
- Jiangxi’s Key Laboratory of Green Chemistry, Jiangxi Normal University, Nanchang, Jiangxi 330022, China
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17
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Nasrollahzadeh M, Sajjadi M, Ghorbannezhad F, Sajadi SM. A Review on Recent Advances in the Application of Nanocatalysts in A
3
Coupling Reactions. CHEM REC 2018. [DOI: 10.1002/tcr.201700100] [Citation(s) in RCA: 48] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Affiliation(s)
| | - Mohaddeseh Sajjadi
- Department of ChemistryFaculty of Science University of Qom Qom 37185-359 Iran
| | | | - S. Mohammad Sajadi
- Department of Petroleum Geoscience, Faculty of ScienceSoran University PO Box 624 Soran, Kurdistan Regional Government Iraq
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18
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Shaabani A, Mohammadian R, Hashemzadeh A, Afshari R, Amini MM. Amine-functionalized MIL-101(Cr) embedded with Co(ii) phthalocyanine as a durable catalyst for one-pot tandem oxidative A3coupling reactions of alcohols. NEW J CHEM 2018. [DOI: 10.1039/c7nj05132h] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
In this study, we report a metal–organic framework (MIL-101(Cr)-NH2) postsynthetically modifiedviacovalent immobilization of cobalt(ii) phthalocyanine as an efficient and mild catalytic system.
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Affiliation(s)
- Ahmad Shaabani
- Faculty of Chemistry
- Shahid Beheshti University
- Tehran
- Iran
| | | | | | - Ronak Afshari
- Faculty of Chemistry
- Shahid Beheshti University
- Tehran
- Iran
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19
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Wünsch M, Schröder D, Fröhr T, Teichmann L, Hedwig S, Janson N, Belu C, Simon J, Heidemeyer S, Holtkamp P, Rudlof J, Klemme L, Hinzmann A, Neumann B, Stammler HG, Sewald N. Asymmetric synthesis of propargylamines as amino acid surrogates in peptidomimetics. Beilstein J Org Chem 2017; 13:2428-2441. [PMID: 29234470 PMCID: PMC5704752 DOI: 10.3762/bjoc.13.240] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/08/2017] [Accepted: 10/19/2017] [Indexed: 12/26/2022] Open
Abstract
The amide moiety of peptides can be replaced for example by a triazole moiety, which is considered to be bioisosteric. Therefore, the carbonyl moiety of an amino acid has to be replaced by an alkyne in order to provide a precursor of such peptidomimetics. As most amino acids have a chiral center at Cα, such amide bond surrogates need a chiral moiety. Here the asymmetric synthesis of a set of 24 N-sulfinyl propargylamines is presented. The condensation of various aldehydes with Ellman's chiral sulfinamide provides chiral N-sulfinylimines, which were reacted with (trimethylsilyl)ethynyllithium to afford diastereomerically pure N-sulfinyl propargylamines. Diverse functional groups present in the propargylic position resemble the side chain present at the Cα of amino acids. Whereas propargylamines with (cyclo)alkyl substituents can be prepared in a direct manner, residues with polar functional groups require suitable protective groups. The presence of particular functional groups in the side chain in some cases leads to remarkable side reactions of the alkyne moiety. Thus, electron-withdrawing substituents in the Cα-position facilitate a base induced rearrangement to α,β-unsaturated imines, while azide-substituted propargylamines form triazoles under surprisingly mild conditions. A panel of propargylamines bearing fluoro or chloro substituents, polar functional groups, or basic and acidic functional groups is accessible for the use as precursors of peptidomimetics.
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Affiliation(s)
- Matthias Wünsch
- Organic and Bioorganic Chemistry, Department of Chemistry, Bielefeld University, Universitätsstraße 25, D-33615 Bielefeld, Germany
| | - David Schröder
- Organic and Bioorganic Chemistry, Department of Chemistry, Bielefeld University, Universitätsstraße 25, D-33615 Bielefeld, Germany
| | - Tanja Fröhr
- Organic and Bioorganic Chemistry, Department of Chemistry, Bielefeld University, Universitätsstraße 25, D-33615 Bielefeld, Germany
| | - Lisa Teichmann
- Organic and Bioorganic Chemistry, Department of Chemistry, Bielefeld University, Universitätsstraße 25, D-33615 Bielefeld, Germany
| | - Sebastian Hedwig
- Organic and Bioorganic Chemistry, Department of Chemistry, Bielefeld University, Universitätsstraße 25, D-33615 Bielefeld, Germany
| | - Nils Janson
- Organic and Bioorganic Chemistry, Department of Chemistry, Bielefeld University, Universitätsstraße 25, D-33615 Bielefeld, Germany
| | - Clara Belu
- Organic and Bioorganic Chemistry, Department of Chemistry, Bielefeld University, Universitätsstraße 25, D-33615 Bielefeld, Germany
| | - Jasmin Simon
- Organic and Bioorganic Chemistry, Department of Chemistry, Bielefeld University, Universitätsstraße 25, D-33615 Bielefeld, Germany
| | - Shari Heidemeyer
- Organic and Bioorganic Chemistry, Department of Chemistry, Bielefeld University, Universitätsstraße 25, D-33615 Bielefeld, Germany
| | - Philipp Holtkamp
- Organic and Bioorganic Chemistry, Department of Chemistry, Bielefeld University, Universitätsstraße 25, D-33615 Bielefeld, Germany
| | - Jens Rudlof
- Organic and Bioorganic Chemistry, Department of Chemistry, Bielefeld University, Universitätsstraße 25, D-33615 Bielefeld, Germany
| | - Lennard Klemme
- Organic and Bioorganic Chemistry, Department of Chemistry, Bielefeld University, Universitätsstraße 25, D-33615 Bielefeld, Germany
| | - Alessa Hinzmann
- Organic and Bioorganic Chemistry, Department of Chemistry, Bielefeld University, Universitätsstraße 25, D-33615 Bielefeld, Germany
| | - Beate Neumann
- Organic and Bioorganic Chemistry, Department of Chemistry, Bielefeld University, Universitätsstraße 25, D-33615 Bielefeld, Germany
| | - Hans-Georg Stammler
- Organic and Bioorganic Chemistry, Department of Chemistry, Bielefeld University, Universitätsstraße 25, D-33615 Bielefeld, Germany
| | - Norbert Sewald
- Organic and Bioorganic Chemistry, Department of Chemistry, Bielefeld University, Universitätsstraße 25, D-33615 Bielefeld, Germany
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20
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Single and double A3-coupling (aldehyde-amine-alkyne) reaction catalyzed by an air stable copper(I)-phosphole complex. Tetrahedron Lett 2017. [DOI: 10.1016/j.tetlet.2017.09.031] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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21
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Rosales J, Garcia JM, Ávila E, González T, Coll DS, Ocando-Mavárez E. A novel tetramer copper(I) complex containing diallylphosphine ligands: Synthesis, characterization and catalytic application in A3-coupling (Aldehyde-Amine-Alkyne) reactions. Inorganica Chim Acta 2017. [DOI: 10.1016/j.ica.2017.07.038] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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22
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Yang X, Hu F, Wang Y, Yang C, Zou X, Liu J, Zhang Q. Base-catalyzed cascade synthesis of 2,3-dihydrofuro[2,3-b]pyridines and 2,3-dihydro-1H-pyrrolo[2,3-b]pyridines from N-propargylic β-enaminones. Chem Commun (Camb) 2017. [DOI: 10.1039/c7cc03308g] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Abstract
A novel protocol to prepare dihydrofuropyridine and dihydropyrrolopyridine derivatives from KOH-catalyzed reactions between N-propargylic β-enaminones and arylaldehydes or N-sulfonyl imines has been developed.
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Affiliation(s)
- Xiaobing Yang
- State Key Laboratory and Institute of Elemento-Organic Chemistry
- Nankai University
- Tianjin 300071
- China
- Department of Chemistry
| | - Fangzhong Hu
- State Key Laboratory and Institute of Elemento-Organic Chemistry
- Nankai University
- Tianjin 300071
- China
| | - Yang Wang
- State Key Laboratory and Institute of Elemento-Organic Chemistry
- Nankai University
- Tianjin 300071
- China
| | - Chiming Yang
- State Key Laboratory and Institute of Elemento-Organic Chemistry
- Nankai University
- Tianjin 300071
- China
- Department of Chemistry
| | - Xiaomao Zou
- State Key Laboratory and Institute of Elemento-Organic Chemistry
- Nankai University
- Tianjin 300071
- China
| | - Jiahui Liu
- State Key Laboratory and Institute of Elemento-Organic Chemistry
- Nankai University
- Tianjin 300071
- China
| | - Qichun Zhang
- School of Materials Science Engineering
- Nanyang Technological University
- Singapore
- Division of Chemistry and Biological Chemistry
- School of Physical and Mathematical Sciences
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23
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24
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Bosica G, Gabarretta J. Unprecedented one-pot multicomponent synthesis of propargylamines using Amberlyst A-21 supported CuI under solvent-free conditions. RSC Adv 2015. [DOI: 10.1039/c5ra05546f] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023] Open
Abstract
An environmentally benign, one-pot, A3-coupling reaction of various aldehydes, amines and terminal alkynes for the synthesis of propargylamine was catalysed by Amberlyst A-21 supported CuI, under heterogeneous and solvent-free conditions.
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Affiliation(s)
- Giovanna Bosica
- Department of Chemistry
- University of Malta
- Msida MSD2080
- Malta
| | - John Gabarretta
- Department of Chemistry
- University of Malta
- Msida MSD2080
- Malta
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25
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Stecko S, Furman B, Chmielewski M. Kinugasa reaction: an ‘ugly duckling’ of β-lactam chemistry. Tetrahedron 2014. [DOI: 10.1016/j.tet.2014.06.024] [Citation(s) in RCA: 48] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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26
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Lu H, Li C, Jiang H, Lizardi CL, Zhang XP. Chemoselective Amination of Propargylic C(sp3)H Bonds by Cobalt(II)-Based Metalloradical Catalysis. Angew Chem Int Ed Engl 2014. [DOI: 10.1002/ange.201400557] [Citation(s) in RCA: 44] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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27
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Lu H, Li C, Jiang H, Lizardi CL, Zhang XP. Chemoselective amination of propargylic C(sp³)-H bonds by cobalt(II)-based metalloradical catalysis. Angew Chem Int Ed Engl 2014; 53:7028-32. [PMID: 24840605 DOI: 10.1002/anie.201400557] [Citation(s) in RCA: 134] [Impact Index Per Article: 13.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/18/2014] [Revised: 03/16/2014] [Indexed: 11/05/2022]
Abstract
Highly chemoselective intramolecular amination of propargylic C(sp(3))-H bonds has been demonstrated for N-bishomopropargylic sulfamoyl azides through cobalt(II)-based metalloradical catalysis. Supported by D(2h)-symmetric amidoporphyrin ligand 3,5-Di(t)Bu-IbuPhyrin, the cobalt(II)-catalyzed C-H amination proceeds effectively under neutral and nonoxidative conditions without the need of any additives, and generates N2 as the only byproduct. The metalloradical amination is suitable for both secondary and tertiary propargylic C-H substrates with an unusually high degree of functional-group tolerance, thus providing a direct method for high-yielding synthesis of functionalized propargylamine derivatives.
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Affiliation(s)
- Hongjian Lu
- Department of Chemistry, University of South Florida, Tampa, FL 33620-5250 (USA); Institute of Chemistry and BioMedical Sciences, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing, 210093 (China).
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28
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A novel atom-economic synthesis of functionalized imidazolidines through copper(I)-catalyzed domino three-component coupling and cyclization reactions. Tetrahedron 2014. [DOI: 10.1016/j.tet.2014.03.063] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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29
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Facile synthesis of α-difluoromethyl α-propargylamines from CF2H-substituted N-tert-butanesulfinyl ketimines. CHINESE CHEM LETT 2012. [DOI: 10.1016/j.cclet.2011.11.016] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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30
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Peshkov VA, Pereshivko OP, Van der Eycken EV. A walk around the A3-coupling. Chem Soc Rev 2012; 41:3790-807. [DOI: 10.1039/c2cs15356d] [Citation(s) in RCA: 542] [Impact Index Per Article: 45.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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31
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Liu J, Hu J. Highly diastereoselective synthesis of α-difluoromethyl amines from N-tert-butylsulfinyl ketimines and difluoromethyl phenyl sulfone. Chemistry 2010; 16:11443-54. [PMID: 20725920 DOI: 10.1002/chem.201000893] [Citation(s) in RCA: 46] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Abstract
The first highly efficient and stereoselective difluoromethylation of structurally diverse N-tert-butylsulfinyl ketimines has been achieved with an in situ generated PhSO(2)CF(2)(-) anion, which provides a powerful synthetic method for the preparation of a variety of structurally diverse homochiral α-difluoromethyl tertiary carbinamines, including α-difluoromethyl allylic amines and α-difluoromethyl propargylamines. The stereocontrol mode of the present diastereoselective difluoromethylation of ketimines was found to be different from that of other known fluoroalkylations of N-tert-butylsulfinyl aldimines, which suggests that a cyclic six-membered transition state may be involved in the reaction.
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Affiliation(s)
- Jun Liu
- Key Laboratory of Organofluorine Chemistry, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, 345 Ling-Ling Road, Shanghai 200032, China
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32
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Xiao H, Huang Y, Qing FL. Highly diastereoselective synthesis of α-trifluoromethylated α-propargylamines by acetylide addition to chiral CF3-substituted N-tert-butanesulfinyl ketimines. ACTA ACUST UNITED AC 2010. [DOI: 10.1016/j.tetasy.2010.11.028] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
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33
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Nie J, Guo HC, Cahard D, Ma JA. Asymmetric construction of stereogenic carbon centers featuring a trifluoromethyl group from prochiral trifluoromethylated substrates. Chem Rev 2010; 111:455-529. [PMID: 21117644 DOI: 10.1021/cr100166a] [Citation(s) in RCA: 876] [Impact Index Per Article: 62.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Jing Nie
- Department of Chemistry, Tianjin University, China
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34
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Konev AS, Abbaspour Tehrani K, Khlebnikov AF, Novikov MS, Magull J. Monofluorinated aziridines in asymmetric synthesis of chiral fluorinated prop-2-yn-1-amines. RUSSIAN JOURNAL OF ORGANIC CHEMISTRY 2010. [DOI: 10.1134/s1070428010070043] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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35
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Trifluoroacetaldehyde: A useful industrial bulk material for the synthesis of trifluoromethylated amino compounds. J Fluor Chem 2010. [DOI: 10.1016/j.jfluchem.2009.12.023] [Citation(s) in RCA: 65] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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36
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Hachiya I, Shimizu M. New Synthetic Reactions Using Conjugate Addition Reactions of Nucleophiles to .ALPHA.,.BETA.-Unsaturated Imines. J SYN ORG CHEM JPN 2010. [DOI: 10.5059/yukigoseikyokaishi.68.1006] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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37
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Synthesis and reactivity of alkenyl- and alkynyl-substituted β,β-dihalo-and β,β,β-trichloroamines. Tetrahedron 2009. [DOI: 10.1016/j.tet.2009.01.034] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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38
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Likhar PR, Subhas MS, Roy S, Kantam ML, Sridhar B, Seth RK, Biswas S. Synthesis of highly substituted 2-perfluoroalkyl quinolines by electrophilic iodocyclization of perfluoroalkyl propargyl imines/amines. Org Biomol Chem 2009; 7:85-93. [DOI: 10.1039/b815398a] [Citation(s) in RCA: 60] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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39
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Formicola L, Maréchal X, Basse N, Bouvier-Durand M, Bonnet-Delpon D, Milcent T, Reboud-Ravaux M, Ongeri S. Novel fluorinated pseudopeptides as proteasome inhibitors. Bioorg Med Chem Lett 2009; 19:83-6. [PMID: 19041239 DOI: 10.1016/j.bmcl.2008.11.012] [Citation(s) in RCA: 29] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/03/2008] [Revised: 11/02/2008] [Accepted: 11/04/2008] [Indexed: 01/08/2023]
Affiliation(s)
- Lucia Formicola
- Faculté de Pharmacie, Université Paris-Sud 11, UMR-CNRS 8076, Molécules Fluorées et Chimie Médicinale, IFR 141, Châtenay-Malabry cedex, France
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40
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Chen M, Zhang Q, Zhang X, Zhong P, Hu M. A convenient synthesis of CF3-containing alkynyl imines by a copper-free Sonogashira coupling of imidoyl chlorides with terminal alkynes. JOURNAL OF CHEMICAL RESEARCH 2008. [DOI: 10.3184/030823408x374224] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
A series of N-aryltrifluoroacetimidoyl chlorides and 1-alkynes were converted into α-imino alkynes by a Sonogashira reaction using Pd(PPh3)4/DABCO as the catalyst. The reaction proceeded smoothly to give the coupled products in good to excellent yields.
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Affiliation(s)
- Muwang Chen
- College of Chemistry and Materials Engineering, Wenzhou University, Wenzhou 325027, P.R. China
| | - Qiaochu Zhang
- College of Chemistry and Biological Engineering, Yichun University, Yichun 336000, P.R. China
| | - Xingguo Zhang
- College of Chemistry and Materials Engineering, Wenzhou University, Wenzhou 325027, P.R. China
| | - Ping Zhong
- College of Chemistry and Materials Engineering, Wenzhou University, Wenzhou 325027, P.R. China
| | - Maolin Hu
- College of Chemistry and Materials Engineering, Wenzhou University, Wenzhou 325027, P.R. China
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41
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Olier C, Azzi N, Gil G, Gastaldi S, Bertrand MP. Dicobalt hexacarbonyl complexes of alkynyl imines in a sequential Staudinger/Pauson-Khand process. A route to new fused tricyclic beta-lactams. J Org Chem 2008; 73:8469-73. [PMID: 18844409 DOI: 10.1021/jo801668b] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Dicobalt hexacarbonyl complexes of alkynyl imines were allowed to react with ketenes via Staudinger reaction. Sequential [2 + 2] cycloaddition/Pauson-Khand reaction led to structurally new fused-tricyclic beta-lactams and fused-azabicyclic cyclopentenones. Chemoselectivity, scope, and limitation of the process were investigated.
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Affiliation(s)
- Clarisse Olier
- Laboratoire de Chimie Moléculaire Organique, LCP UMR 6264, boite 562, Université Paul Cézanne, Faculté des Sciences St. Jérôme, Avenue Escadrille Normandie-Niemen, 13397 Marseille Cedex 20, France
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42
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Martinelli M, Milcent T, Ongeri S, Crousse B. Synthesis of new triazole-based trifluoromethyl scaffolds. Beilstein J Org Chem 2008; 4:19. [PMID: 18941482 PMCID: PMC2486457 DOI: 10.3762/bjoc.4.19] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/25/2008] [Accepted: 05/27/2008] [Indexed: 11/23/2022] Open
Abstract
Trifluoromethyl propargylamines react with various azide derivatives to afford 1,4-disubstituted 1,2,3-triazoles through a Huisgen 1,3-dipolar cycloaddition. The reaction is catalyzed by a Cu(I) species in acetonitrile, and the corresponding products are obtained in good yields. This process thus offers an entry to new trifluoromethyl peptidomimetics as interesting scaffolds.
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Affiliation(s)
- Michela Martinelli
- Laboratoire BioCIS-CNRS, Faculté de Pharmacie, Univ. Paris-Sud, rue J. B. Clément, F-92296 Châtenay-Malabry, France.
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43
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New method of preparation of C2F5Li and its reactions with cyclic imines and lactims: Synthesis of α-pentafluoroethyl proline. J Fluor Chem 2008. [DOI: 10.1016/j.jfluchem.2008.01.013] [Citation(s) in RCA: 54] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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44
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Magueur G, Crousse B, Bonnet-Delpon D. Stereoselective Access to Substituted [(E)- or (Z)-1-(Trifluoromethyl)allyl]amines. European J Org Chem 2008. [DOI: 10.1002/ejoc.200701090] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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45
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Konev AS, Stas S, Novikov MS, Khlebnikov AF, Abbaspour Tehrani K. Fluoroaziridines as novel substrates in the modified Petasis reaction: synthesis of monofluorinated propargyl amines. Tetrahedron 2008. [DOI: 10.1016/j.tet.2007.10.067] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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46
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47
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Mangelinckx S, Rooryck S, Jacobs J, De Kimpe N. Straightforward synthesis of alkynyl imines via 1,2-elimination of α,α-dichloroketimines. Tetrahedron Lett 2007. [DOI: 10.1016/j.tetlet.2007.07.047] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
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48
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Díez R, Badorrey R, Díaz-de-Villegas MD, Gálvez JA. Highly Stereoselective Synthesis of Stereochemically Defined Polyhydroxylated Propargylamines by Alkynylation ofN-Benzylimines Derived from (R)-Glyceraldehyde. European J Org Chem 2007. [DOI: 10.1002/ejoc.200601011] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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49
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Fustero S, Sanchez-Roselló M, Rodrigo V, del Pozo C, Sanz-Cervera JF, Simón A, Ramírez de Arellano C. Asymmetric Synthesis of New β,β-Difluorinated Cyclic Quaternary α-Amino Acid Derivatives. Org Lett 2006; 8:4129-32. [PMID: 16928091 DOI: 10.1021/ol061733c] [Citation(s) in RCA: 40] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
The synthesis of new beta,beta-difluorinated cyclic quaternary alpha-amino acid derivatives 1 in which a ring-closing metathesis reaction (RCM) constitutes the key step is described. The approach employs imidoyl chlorides 3 as fluorinated building blocks, and the overall process involves the stereoselective creation of a quaternary stereocenter. Complete selectivity was achieved when (R)-phenylglycinol methyl ether was used as chiral auxiliary, allowing for the preparation of new six-membered cyclic fluorinated alpha-amino acids as single enantiomers.
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Affiliation(s)
- Santos Fustero
- Departamento de Química Organica, Universidad de Valencia, E-46100 Burjassot, Spain.
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50
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