1
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Derrien B, Leblanc K, Evanno L, Drège E. Enantioselective Total Synthesis of the Neurotoxin Caramboxin. J Org Chem 2024; 89:6489-6493. [PMID: 38607991 DOI: 10.1021/acs.joc.4c00541] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/14/2024]
Abstract
Herein, we report the first and efficient asymmetric total synthesis of the neurotoxin (-)-caramboxin. The key to success is the creation of a stereogenic center by using enantioselective catalytic phase-transfer α-alkylation of glycine imines, affording this unusual α-amino acid in good yields and up to 99% ee. This work validates the S configuration of the natural product.
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Affiliation(s)
- Benoit Derrien
- CNRS, BioCIS, Université Paris-Saclay, Orsay 91400, France
| | - Karine Leblanc
- CNRS, BioCIS, Université Paris-Saclay, Orsay 91400, France
| | - Laurent Evanno
- CNRS, BioCIS, Université Paris-Saclay, Orsay 91400, France
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2
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Ermanis K, Gibson DC, Genov GR, Phipps RJ. Interrogating the Crucial Interactions at Play in the Chiral Cation-Directed Enantioselective Borylation of Arenes. ACS Catal 2023; 13:13043-13055. [PMID: 37822864 PMCID: PMC10563137 DOI: 10.1021/acscatal.3c03384] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/24/2023] [Revised: 08/28/2023] [Indexed: 10/13/2023]
Abstract
Rendering a common ligand scaffold anionic and then pairing it with a chiral cation represents an alternative strategy for developing enantioselective versions of challenging transformations, as has been recently demonstrated in the enantioselective borylation of arenes using a quinine-derived chiral cation. A significant barrier to the further generalization of this approach is the lack of understanding of the specific interactions involved between the cation, ligand, and substrate, given the complexity of the system. We have embarked on a detailed computational study probing the mechanism, the key noncovalent interactions involved, and potential origin of selectivity for the desymmetrizing borylation of two distinct classes of substrate. We describe a deconstructive, stepwise approach to tackling this complex challenge, which involves building up a detailed understanding of the pairwise components of the nominally three component system before combining together into the full 263-atom reactive complex. This approach has revealed substantial differences in the noncovalent interactions occurring at the stereodetermining transition state for C-H oxidative addition to iridium for the two substrate classes. Each substrate engages in a unique mixture of diverse interactions, a testament to the rich and privileged structure of the cinchona alkaloid-derived chiral cations. Throughout the study, experimental support is provided, and this culminates in the discovery that prochiral phosphine oxide substrates, lacking hydrogen bond donor functionality, can also give very encouraging levels of enantioselectivity, potentially through direct interactions with the chiral cation. We envisage that the findings in this study will spur further developments in using chiral cations as controllers in asymmetric transition-metal catalysis.
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Affiliation(s)
- Kristaps Ermanis
- School
of Chemistry, University of Nottingham, University Park, Nottingham NG7 2RD, United
Kingdom
| | - David C. Gibson
- Yusuf
Hamied Department of Chemistry, University
of Cambridge, Lensfield Road, Cambridge CB2 1EW, United Kingdom
| | - Georgi R. Genov
- Yusuf
Hamied Department of Chemistry, University
of Cambridge, Lensfield Road, Cambridge CB2 1EW, United Kingdom
| | - Robert J. Phipps
- Yusuf
Hamied Department of Chemistry, University
of Cambridge, Lensfield Road, Cambridge CB2 1EW, United Kingdom
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3
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Jurczak J, Majdecki M, Niedbała P, Tyszka-Gumkowska A. Assisted by Hydrogen-Bond Donors: Cinchona Quaternary Salts as Privileged Chiral Catalysts for Phase-Transfer Reactions. SYNTHESIS-STUTTGART 2021. [DOI: 10.1055/a-1472-7999] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
Abstract
AbstractThis short review is devoted to asymmetric phase-transfer reactions that employ hybrid ammonium Cinchona catalysts supported by possessing hydrogen-bond donor groups. We present recent advances utilizing this type of catalyst in the field of biphasic reaction systems. The main emphasis is placed on the advantages of additional functional groups present in the structure of the catalyst, such as hydroxy, amide, (thio)urea or squaramide.1 Introduction2 Phase-Transfer Hybrid Cinchona Catalysts with a Free Hydroxy Group3 (Thio)urea Hybrid Cinchona Catalysts4 Hybrid Amide-Based Catalysts Bearing a Cinchona Scaffold5 Conclusions
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4
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Lodewyk MW, Tantillo DJ. Nonclassical ammonium ions as intermediates in cinchona alkaloid rearrangements? Chirality 2020; 32:484-488. [PMID: 32059066 DOI: 10.1002/chir.23188] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/26/2019] [Accepted: 01/08/2020] [Indexed: 11/11/2022]
Abstract
The classical/nonclassical nature of cationic ammonium intermediates proposed to be involved in cinchona alkaloid solvolysis and related reactions is investigated. While these intermediates are found to possess highly distorted geometries in which the central nitrogen atom and three of the attached groups are essentially coplanar, we do not find evidence of a nonclassical bonding array. Instead, we find evidence that the intermediate resembles a classical, albeit strained, aziridinium structure, which is still able to account for experimental observations.
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Affiliation(s)
| | - Dean J Tantillo
- Department of Chemistry, University of California, California, USA
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5
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Ullah MW, Thao NTP, Sugimoto T, Haraguchi N. Synthesis of core-corona polymer microsphere-supported cinchonidinium salt and its application to asymmetric synthesis. MOLECULAR CATALYSIS 2019. [DOI: 10.1016/j.mcat.2019.110392] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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6
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Woo S, Kim YG, Lim B, Oh J, Lee Y, Gwon H, Nahm K. Dimeric cinchona ammonium salts with benzophenone linkers: enantioselective phase transfer catalysts for the synthesis of α-amino acids. RSC Adv 2018; 8:2157-2160. [PMID: 35542601 PMCID: PMC9077251 DOI: 10.1039/c7ra12499f] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/16/2017] [Accepted: 12/30/2017] [Indexed: 12/02/2022] Open
Abstract
Chiral phase transfer catalysts of dimeric cinchona ammonium salts linked with a benzophenone bridge showed high enantioselectivity in the α-alkylation of a glycinate ester under mild industry-applicable conditions: 0.5 mol% PTC and near equivalents of alkyl halide. A dual function of the dimeric quinuclidiniums was proposed for the high efficiency. Novel cinchona-alkaloid derived dimeric phase transfer catalysts (PTC) with benzophenone linkers and their α-alkylation of glycinate esters has been presented.![]()
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Affiliation(s)
- Seunga Woo
- School of Chemistry and Biochemistry
- Yeungnam University
- Gyeongsan
- Republic of Korea
| | - Yong-Gyun Kim
- School of Chemistry and Biochemistry
- Yeungnam University
- Gyeongsan
- Republic of Korea
| | - Baegeun Lim
- School of Chemistry and Biochemistry
- Yeungnam University
- Gyeongsan
- Republic of Korea
| | - Jiin Oh
- School of Chemistry and Biochemistry
- Yeungnam University
- Gyeongsan
- Republic of Korea
| | - Yeonji Lee
- School of Chemistry and Biochemistry
- Yeungnam University
- Gyeongsan
- Republic of Korea
| | - Hyeri Gwon
- School of Chemistry and Biochemistry
- Yeungnam University
- Gyeongsan
- Republic of Korea
| | - Keepyung Nahm
- School of Chemistry and Biochemistry
- Yeungnam University
- Gyeongsan
- Republic of Korea
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7
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Filp U, Pekošak A, Poot AJ, Windhorst AD. Enantioselective synthesis of carbon-11 labeled l-alanine using phase transfer catalysis of Schiff bases. Tetrahedron 2016. [DOI: 10.1016/j.tet.2016.08.069] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
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8
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Schettini R, De Riccardis F, Della Sala G, Izzo I. Enantioselective Alkylation of Amino Acid Derivatives Promoted by Cyclic Peptoids under Phase-Transfer Conditions. J Org Chem 2016; 81:2494-505. [PMID: 26914694 DOI: 10.1021/acs.joc.6b00065] [Citation(s) in RCA: 43] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
The effects of substituents and cavity size on catalytic efficiency of proline-rich cyclopeptoids under phase-transfer conditions were studied. High affinity constants (Ka) for the sodium and potassium cations, comparable to those reported for crown ethers, were observed for an alternated N-benzylglycine/L-proline hexameric cyclopeptoid. This compound was found to catalyze the alkylation of N-(diphenylmethylene)glycine cumyl ester in values of enantioselectivities comparable with those reported for the Cinchona alkaloid ammonium salts derivatives (83-96% ee), and with lower catalyst loading (1-2.5% mol), in the presence of a broad range of benzyl, allyl and alkyl halides.
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Affiliation(s)
- Rosaria Schettini
- Dipartimento di Chimica e Biologia "A. Zambelli", Università degli Studi di Salerno , Via Giovanni Paolo II 132, 84084 Fisciano, SA, Italy
| | - Francesco De Riccardis
- Dipartimento di Chimica e Biologia "A. Zambelli", Università degli Studi di Salerno , Via Giovanni Paolo II 132, 84084 Fisciano, SA, Italy
| | - Giorgio Della Sala
- Dipartimento di Chimica e Biologia "A. Zambelli", Università degli Studi di Salerno , Via Giovanni Paolo II 132, 84084 Fisciano, SA, Italy
| | - Irene Izzo
- Dipartimento di Chimica e Biologia "A. Zambelli", Università degli Studi di Salerno , Via Giovanni Paolo II 132, 84084 Fisciano, SA, Italy
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9
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Allingham MT, Bennett EL, Davies DH, Harper PM, Howard-Jones A, Mehdar YT, Murphy PJ, Thomas DA, Caulkett PW, Potter D, Lam CM, O'Donoghue AC. Synthesis, applications and mechanistic investigations of C2 symmetric guanidinium salts. Tetrahedron 2016. [DOI: 10.1016/j.tet.2015.11.058] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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10
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Schettini R, Nardone B, De Riccardis F, Della Sala G, Izzo I. Cyclopeptoids as Phase-Transfer Catalysts for the Enantioselective Synthesis of α-Amino Acids. European J Org Chem 2014. [DOI: 10.1002/ejoc.201403224] [Citation(s) in RCA: 34] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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11
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Johnston HJ, McWhinnie FS, Landi F, Hulme AN. Flexible, Phase-Transfer Catalyzed Approaches to 4-Substituted Prolines. Org Lett 2014; 16:4778-81. [PMID: 25191962 DOI: 10.1021/ol502239g] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
Affiliation(s)
- Heather J. Johnston
- EaStCHEM School of Chemistry, University of Edinburgh, West Mains Road, Edinburgh, EH9 3JJ, U.K
| | - Fergus S. McWhinnie
- EaStCHEM School of Chemistry, University of Edinburgh, West Mains Road, Edinburgh, EH9 3JJ, U.K
| | - Felicetta Landi
- EaStCHEM School of Chemistry, University of Edinburgh, West Mains Road, Edinburgh, EH9 3JJ, U.K
| | - Alison N. Hulme
- EaStCHEM School of Chemistry, University of Edinburgh, West Mains Road, Edinburgh, EH9 3JJ, U.K
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12
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Marco-Martínez J, Reboredo S, Izquierdo M, Marcos V, López JL, Filippone S, Martín N. Enantioselective cycloaddition of münchnones onto [60]fullerene: organocatalysis versus metal catalysis. J Am Chem Soc 2014; 136:2897-904. [PMID: 24483247 PMCID: PMC3954715 DOI: 10.1021/ja500071k] [Citation(s) in RCA: 60] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
Abstract
![]()
Novel
chiral catalytic systems based on both organic compounds
and metal salts have been developed for the enantioselective [3 +
2] cycloaddition of münchnones onto fullerenes and olefins.
These two different approaches proved to be efficient and complementary
in the synthesis of optically active pyrrolino[3,4:1,2][60]fullerenes
with high levels of enantiomeric excess and moderate to good conversions.
Further functionalization of the pyrrolinofullerene carboxylic acid
derivatives has been carried out by esterification and amidation reactions.
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Affiliation(s)
- Juan Marco-Martínez
- Departamento de Química Orgánica I, Facultad de Química, Universidad Complutense , E-28040 Madrid, Spain
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13
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Asymmetric Phase-Transfer Catalysis as a Powerful Tool in the Synthesis of Biologically Active Chiral Complex Natural Products. ACTA ACUST UNITED AC 2014. [DOI: 10.1016/b978-0-444-63430-6.00014-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/05/2023]
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14
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Sorochinsky AE, Aceña JL, Moriwaki H, Sato T, Soloshonok VA. Asymmetric synthesis of α-amino acids via homologation of Ni(II) complexes of glycine Schiff bases; Part 1: alkyl halide alkylations. Amino Acids 2013; 45:691-718. [DOI: 10.1007/s00726-013-1539-4] [Citation(s) in RCA: 125] [Impact Index Per Article: 11.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/16/2013] [Accepted: 06/17/2013] [Indexed: 11/24/2022]
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15
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16
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Cook TC, Andrus MB, Ess DH. Quantum Mechanical Transition-State Analysis Reveals the Precise Origin of Stereoselectivity in Chiral Quaternary Cinchonidinium Phase-Transfer Catalyzed Enolate Allylation. Org Lett 2012; 14:5836-9. [DOI: 10.1021/ol3026582] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Thomas C. Cook
- Department of Chemistry and Biochemistry, Brigham Young University, Provo, Utah, 84602, United States
| | - Merritt B. Andrus
- Department of Chemistry and Biochemistry, Brigham Young University, Provo, Utah, 84602, United States
| | - Daniel H. Ess
- Department of Chemistry and Biochemistry, Brigham Young University, Provo, Utah, 84602, United States
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17
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Parvez MM, Haraguchi N, Itsuno S. Molecular design of chiral quaternary ammonium polymers for asymmetric catalysis applications. Org Biomol Chem 2012; 10:2870-7. [PMID: 22392543 DOI: 10.1039/c2ob06909a] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Repeated reaction between a chiral quaternary ammonium dimer and disodium disulfonate gave a chiral ionic polymer, which showed excellent catalytic activity in the asymmetric benzylation of N-diphenylmethylene glycine tert-butyl ester.
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Affiliation(s)
- Md Masud Parvez
- Department of Environmental and Life Sciences, Molecular Chemistry Division, Toyohashi University of Technology, Toyohashi, 441-8580, Japan
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18
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Tarí S, Avila A, Chinchilla R, Nájera C. Enantioselective quaternization of 4-substituted oxazol-5-(4H)-ones using recoverable Cinchona-derived dimeric ammonium salts as phase-transfer organocatalysts. ACTA ACUST UNITED AC 2012. [DOI: 10.1016/j.tetasy.2012.01.012] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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19
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Using the same organocatalyst for asymmetric synthesis of both enantiomers of glutamic acid-derived Ni(II) complexes via 1,4-additions of achiral glycine and dehydroalanine Schiff base Ni(II) complexes. Amino Acids 2011; 43:299-308. [DOI: 10.1007/s00726-011-1076-y] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/27/2011] [Accepted: 09/02/2011] [Indexed: 11/26/2022]
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20
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Palladium catalysed asymmetric alkylation of benzophenone Schiff base glycine esters in ionic liquids. J CHEM SCI 2011. [DOI: 10.1007/s12039-011-0093-4] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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21
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Denmark SE, Gould ND, Wolf LM. A systematic investigation of quaternary ammonium ions as asymmetric phase-transfer catalysts. Synthesis of catalyst libraries and evaluation of catalyst activity. J Org Chem 2011; 76:4260-336. [PMID: 21446721 PMCID: PMC3107728 DOI: 10.1021/jo2005445] [Citation(s) in RCA: 92] [Impact Index Per Article: 7.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Despite over three decades of research into asymmetric phase-transfer catalysis (APTC), a fundamental understanding of the factors that affect the rate and stereoselectivity of this important process are still obscure. This paper describes the initial stages of a long-term program aimed at elucidating the physical organic foundations of APTC employing a chemoinformatic analysis of the alkylation of a protected glycine imine with libraries of enantiomerically enriched quaternary ammonium ions. The synthesis of the quaternary ammonium ions follows a diversity-oriented approach wherein the tandem inter[4 + 2]/intra[3 + 2] cycloaddition of nitroalkenes serves as the key transformation. A two-part synthetic strategy comprised of (1) preparation of enantioenriched scaffolds and (2) development of parallel synthesis procedures is described. The strategy allows for the facile introduction of four variable groups in the vicinity of a stereogenic quaternary ammonium ion. The quaternary ammonium ions exhibited a wide range of activity and to a lesser degree enantioselectivity. Catalyst activity and selectivity are rationalized in a qualitative way on the basis of the effective positive potential of the ammonium ion.
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Affiliation(s)
- Scott E Denmark
- Roger Adams Laboratory, Department of Chemistry, University of Illinois , Urbana, Illinois 61801, United States.
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22
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Optimization of the Selective Monohydrolysis of Diethyl 4-Aryl-4H-pyran-3,5-dicarboxylates. Molecules 2011; 16:3845-54. [PMID: 21552186 PMCID: PMC6263326 DOI: 10.3390/molecules16053845] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/05/2011] [Revised: 04/15/2011] [Accepted: 04/18/2011] [Indexed: 12/01/2022] Open
Abstract
A simple, efficient and eco-friendly procedure for the selective monohydrolysis of diethyl 2,6-dimethyl-4-aryl-4H-pyran-3,5-dicarboxylates under quaternary ammonium salt catalysis conditions is presented. The catalytic activities of various quaternary ammonium salts were investigated using different molar ratios of NaOH and water-organic solvent mixtures. The results indicate that the combination of 1.0 equivalent of tetraethyl-ammonium bromide (TEAB) with 1.2 equivalents of NaOH in a 10% water-ethanol media at 40 °C displays remarkable selectivity for the monohydrolysis of diethyl 2,6-dimethyl-4-aryl-4H-pyran-3,5-dicarboxylates. The utility of this process is demonstrated by the monohydrolysis of a series of 4-aryl-4H-pyran-3,5-dicarboxylate esters to afford the corresponding monoesters in 20–80% yields under the optimized conditions.
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23
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Wang Y, Yu J, Miao Z, Chen R. Bifunctional primary amine-thiourea–TfOH (BPAT·TfOH) as a chiral phase-transfer catalyst: the asymmetric synthesis of dihydropyrimidines. Org Biomol Chem 2011; 9:3050-4. [PMID: 21394354 DOI: 10.1039/c0ob01268h] [Citation(s) in RCA: 36] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Affiliation(s)
- Yangyun Wang
- State Key Laboratory and Institute of Elemento-Organic Chemistry, Nankai University, Tianjin, 300071, China
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24
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Kim DH, Im JK, Kim DW, Lee H, Kim H, Kim HS, Cheong M, Mukherjee DK. Orthopalladated complexes as phase-transfer catalysts for asymmetric alkylation of achiral Schiff base esters. TRANSIT METAL CHEM 2010. [DOI: 10.1007/s11243-010-9416-4] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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25
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Jew SS, Park HG. Cinchona-based phase-transfer catalysts for asymmetric synthesis. Chem Commun (Camb) 2009:7090-103. [PMID: 19920996 DOI: 10.1039/b914028j] [Citation(s) in RCA: 263] [Impact Index Per Article: 17.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Phase-transfer catalysis is one of the most useful methodologies for practical syntheses given its operational simplicity and mild reaction conditions that enable its application in industrial processes. Cinchona alkaloids have been a popular, natural source of practical organocatalysts due largely to their excellent commercial availability and low cost. Since the first Cinchona alkaloid-derived phase-transfer catalysts was disclosed in 1981, diverse generations of Cinchona-derived phase-transfer catalysts have been developed and successfully applied to various asymmetric syntheses. In this feature article, we describe the generation of Cinchona-derived chiral phase-transfer catalysts according to the development stages and our efforts toward the design of polymeric Cinchona phase-transfer catalysts, the effects of the electronic functional group incorporated in the catalysts, and their application in asymmetric organic reactions.
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Affiliation(s)
- Sang-sup Jew
- College of Pharmacy, Seoul National University, Seoul 151-742, Korea.
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26
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Lygo B, Beynon C, Lumley C, McLeod MC, Wade CE. Co-catalyst enhancement of enantioselective PTC Michael additions involving glycine imines. Tetrahedron Lett 2009. [DOI: 10.1016/j.tetlet.2009.02.123] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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27
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Champeil E, Crean C, Larraya C, Pescitelli G, Proni G, Ghosez L. Functionalization of C60 via organometallic reagents. Tetrahedron 2008. [DOI: 10.1016/j.tet.2008.08.017] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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28
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Arakawa Y, Haraguchi N, Itsuno S. An Immobilization Method of Chiral Quaternary Ammonium Salts onto Polymer Supports. Angew Chem Int Ed Engl 2008. [DOI: 10.1002/ange.200802800] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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29
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Arakawa Y, Haraguchi N, Itsuno S. An Immobilization Method of Chiral Quaternary Ammonium Salts onto Polymer Supports. Angew Chem Int Ed Engl 2008; 47:8232-5. [DOI: 10.1002/anie.200802800] [Citation(s) in RCA: 66] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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30
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Affiliation(s)
- Keiji Maruoka
- Department of Chemistry, Graduate School of Science, Kyoto University, Sakyo, Kyoto, 606-8502 Japan
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31
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Li Q, Li L, Pei W, Wang S, Zhang Z. Synthesis of the Novel Chiral Catalysts by Click Chemistry and Their Application. SYNTHETIC COMMUN 2008. [DOI: 10.1080/00397910801914020] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
Affiliation(s)
- Qian Li
- a Key Laboratory of Functional Polymer Materials, Ministry of Education, Institute of Polymer Chemistry, Nankai University , Tianjin , China
| | - Le Li
- a Key Laboratory of Functional Polymer Materials, Ministry of Education, Institute of Polymer Chemistry, Nankai University , Tianjin , China
| | - Wenbo Pei
- a Key Laboratory of Functional Polymer Materials, Ministry of Education, Institute of Polymer Chemistry, Nankai University , Tianjin , China
| | - Shanwei Wang
- a Key Laboratory of Functional Polymer Materials, Ministry of Education, Institute of Polymer Chemistry, Nankai University , Tianjin , China
| | - Zhengpu Zhang
- a Key Laboratory of Functional Polymer Materials, Ministry of Education, Institute of Polymer Chemistry, Nankai University , Tianjin , China
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32
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Hashimoto T, Maruoka K. Recent Development and Application of Chiral Phase-Transfer Catalysts. Chem Rev 2007; 107:5656-82. [DOI: 10.1021/cr068368n] [Citation(s) in RCA: 652] [Impact Index Per Article: 38.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Takuya Hashimoto
- Department of Chemistry, Graduate School of Science, Kyoto University, Sakyo, Kyoto, 606-8502 Japan
| | - Keiji Maruoka
- Department of Chemistry, Graduate School of Science, Kyoto University, Sakyo, Kyoto, 606-8502 Japan
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Lv J, Zhang L, Liu L, Wang Y. A New Class of Acetophenone-based Cinchona Alkaloids as Phase-transfer Catalysts: Application to the Enantioselective Synthesis of α-Amino Acids. CHEM LETT 2007. [DOI: 10.1246/cl.2007.1354] [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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Shirakawa S, Ueda M, Tanaka Y, Hashimoto T, Maruoka K. Design of Binaphthyl-Modified Symmetrical Chiral Phase-Transfer Catalysts: Substituent Effect of 4,4′,6,6′-Positions of Binaphthyl Rings in the Asymmetric Alkylation of a Glycine Derivative. Chem Asian J 2007; 2:1276-81. [PMID: 17705320 DOI: 10.1002/asia.200700117] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Abstract
A series of symmetrical chiral phase-transfer catalysts with 4,4',6,6'-tetrasubstituted binaphthyl units have been designed, and these aryl- and trialkylsilyl-substituted phase-transfer catalysts, which included a highly fluorinated catalyst, were prepared. The chiral efficiency of these chiral phase-transfer catalysts was investigated in the asymmetric alkylation of tert-butylglycinate-benzophenone Schiff base under mild phase-transfer conditions, and the eminent substituent effect of the 4,4',6,6'-positions of the binaphthyl units on enantioselection was observed. In particular, the OctMe2Si-substituted catalyst was found to be highly efficient for the phase-transfer alkylation of tert-butylglycinate-benzophenone Schiff base with various alkyl halides, including sec-alkyl halides. The highly fluorinated catalyst was also utilized as a recyclable chiral phase-transfer catalyst by simple extraction with fluorous solvents.
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Affiliation(s)
- Seiji Shirakawa
- Department of Chemistry, Graduate School of Science, Kyoto University, Kyoto 606-8502, Japan
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Abstract
The use of chiral nonracemic onium salts and crown ethers as effective phase-transfer catalysts have been studied intensively primarily for enantioselective carbon-carbon or carbon-heteroatom bond-forming reactions under mild biphasic conditions. An essential issue for optimal asymmetric catalysis is the rational design of catalysts for targeted reaction, which allows generation of a well-defined chiral ion pair that reacts with electrophiles in a highly efficient and stereoselective manner. This concept, together with the synthetic versatility of phase-transfer catalysis, provides a reliable and general strategy for the practical asymmetric synthesis of highly valuable organic compounds.
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Affiliation(s)
- Takashi Ooi
- Department of Chemistry, Graduate School of Science, Kyoto University, Sakyo, Kyoto 606-8502, Japan
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Polymeric chiral phase-transfer catalysts derived from cinchona alkaloids for enantioselective synthesis of α-amino acids. Tetrahedron 2007. [DOI: 10.1016/j.tet.2007.05.076] [Citation(s) in RCA: 54] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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Fournier Dit Chabert J, Marquez B, Neville L, Joucla L, Broussous S, Bouhours P, David E, Pellet-Rostaing S, Marquet B, Moreau N, Lemaire M. Synthesis and evaluation of new arylbenzo[b]thiophene and diarylthiophene derivatives as inhibitors of the NorA multidrug transporter of Staphylococcus aureus. Bioorg Med Chem 2007; 15:4482-97. [PMID: 17498961 DOI: 10.1016/j.bmc.2007.04.023] [Citation(s) in RCA: 79] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2007] [Revised: 04/07/2007] [Accepted: 04/13/2007] [Indexed: 11/30/2022]
Abstract
The synthesis based on palladium catalytic coupling of 38 new-arylated benzo[b]thiophenes or thiophenes is described in a few steps. We also report the direct arylation of the position 3 of the benzo[b]thiophenic structure, a 'one pot' 2,5-heterodiarylation of thiophenes as well as the synthesis of precursors of amino-acids with a 2-arylated benzo[b]thiophene core. These compounds were evaluated on bacteria strains: most of them did not exhibit any antibiotic activity but were found to selectively inhibit the NorA multidrug transporter of Staphylococcus aureus. As such, they restored the activity of the NorA substrates ciprofloxacin against a resistant S. aureus strain in which this efflux pump is over-expressed.
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Affiliation(s)
- Jérémie Fournier Dit Chabert
- ICBMS, Institut de chimie et BiochimieMoléculaire et Supramoléculaire, UMR-CNRS 5246, Université de Lyon, Université Claude Bernard Lyon 1, CPE Lyon, 43 Bd du 11 Novembre 1918, 69622 Villeurbanne Cedex, France
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Chinchilla R, Nájera C, Ortega FJ. Improved conditions for the asymmetric synthesis of α-amino acids using Cinchona-derived anthracenylmethyl ammonium salts as chiral phase-transfer organocatalysts. ACTA ACUST UNITED AC 2006. [DOI: 10.1016/j.tetasy.2006.12.004] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Hyett DJ, Didonè M, Milcent TJ, Broxterman QB, Kaptein B. A new method for the preparation of functionalized unnatural α-H-α-amino acid derivatives. Tetrahedron Lett 2006. [DOI: 10.1016/j.tetlet.2006.08.096] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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The counterion effect in the phase-transfer catalyzed asymmetric synthesis of α-amino acids promoted by anthryl-derived dimeric Cinchona ammonium salts. ACTA ACUST UNITED AC 2004. [DOI: 10.1016/j.tetasy.2004.07.025] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Achard T, Belokon' YN, Fuentes JA, North M, Parsons T. Influence of aromatic substituents on metal(II)salen catalysed, asymmetric synthesis of α-methyl α-amino acids. Tetrahedron 2004. [DOI: 10.1016/j.tet.2004.05.023] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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Belokon YN, Fuentes J, North M, Steed JW. Influence of the metal and chiral diamine on metal(II)salen catalysed, asymmetric synthesis of α-methyl α-amino acids. Tetrahedron 2004. [DOI: 10.1016/j.tet.2004.02.025] [Citation(s) in RCA: 45] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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Maruoka K, Ooi T. Enantioselective amino acid synthesis by chiral phase-transfer catalysis. Chem Rev 2003; 103:3013-28. [PMID: 12914490 DOI: 10.1021/cr020020e] [Citation(s) in RCA: 713] [Impact Index Per Article: 34.0] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Keiji Maruoka
- Department of Chemistry, Graduate School of Science, Kyoto University, Sakyo, Kyoto 606-8502, Japan
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Identification of a highly effective asymmetric phase-transfer catalyst derived from α-methylnaphthylamine. Tetrahedron Lett 2003. [DOI: 10.1016/s0040-4039(03)01352-2] [Citation(s) in RCA: 82] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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