101
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Triandafillidi I, Bisticha A, Voutyritsa E, Galiatsatou G, Kokotos CG. tert-Butyl ester or benzylamide of the dipeptide Pro-Gly as organocatalysts for the asymmetric aldol reaction. Tetrahedron 2015. [DOI: 10.1016/j.tet.2014.12.078] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
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102
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103
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Huerta E, van Genabeek B, Lamers BAG, Koenigs MME, Meijer EW, Palmans ARA. Triggering activity of catalytic rod-like supramolecular polymers. Chemistry 2015; 21:3682-90. [PMID: 25614098 DOI: 10.1002/chem.201405410] [Citation(s) in RCA: 34] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/25/2014] [Indexed: 11/10/2022]
Abstract
Supramolecular polymers based on benzene-1,3,5-tricarboxamides (BTAs) functionalized with an L- or D-proline moiety display high catalytic activity towards aldol reactions in water. High turnover frequencies (TOF) of up to 27×10(-4) s(-1) and excellent stereoselectivities (up to 96% de, up to 99% ee) were observed. In addition, the catalyst could be reused and remained active at catalyst loadings and substrate concentrations as low as 0.1 mol % and 50 mM, respectively. A temperature-induced conformational change in the supramolecular polymer triggers the high activity of the catalyst. The supramolecular polymer's helical sense in combination with the configuration of the proline (L- or D-) is responsible for the observed selectivity.
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Affiliation(s)
- Elisa Huerta
- Institute for Complex Molecular Systems, Eindhoven University of Technology, P.O. Box 513, 5600 MB Eindhoven (The Netherlands)
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104
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Thankachan AP, Asha S, Sindhu KS, Anilkumar G. An overview of Zn-catalyzed enantioselective aldol type C–C bond formation. RSC Adv 2015. [DOI: 10.1039/c5ra10102f] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Enantioselective zinc-catalyzed aldol reactions provide an efficient route for the construction of a wide range of carbon–carbon bond-formation, which are described here.
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Affiliation(s)
| | - S. Asha
- School of Chemical Sciences
- Mahatma Gandhi University
- Kottayam
- India 686560
| | - K. S. Sindhu
- School of Chemical Sciences
- Mahatma Gandhi University
- Kottayam
- India 686560
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105
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Siddiqui IR, Rahila R, Rai P, Sagir H, Waseem MA. Molecular iodine catalysed domino cyclization in aqueous medium: a simple and efficient synthetic route to 1,4-dihydropyridazines. RSC Adv 2015. [DOI: 10.1039/c5ra05370f] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
An efficient protocol has been developed for the synthesis of dihydropyridazines using molecular iodine as green catalyst.
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Affiliation(s)
- I. R. Siddiqui
- Laboratory of Green Synthesis
- Department of Chemistry
- University of Allahabad
- Allahabad-211002
- India
| | - Rahila Rahila
- Laboratory of Green Synthesis
- Department of Chemistry
- University of Allahabad
- Allahabad-211002
- India
| | - Pragati Rai
- Laboratory of Green Synthesis
- Department of Chemistry
- University of Allahabad
- Allahabad-211002
- India
| | - Hozeyfa Sagir
- Laboratory of Green Synthesis
- Department of Chemistry
- University of Allahabad
- Allahabad-211002
- India
| | - Malik A. Waseem
- Laboratory of Green Synthesis
- Department of Chemistry
- University of Allahabad
- Allahabad-211002
- India
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106
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The Future of Catalysis by Chiral Lewis Acids. TOP ORGANOMETAL CHEM 2015. [DOI: 10.1007/3418_2015_141] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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107
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Neumann LN, Baker MB, Leenders CMA, Voets IK, Lafleur RPM, Palmans ARA, Meijer EW. Supramolecular polymers for organocatalysis in water. Org Biomol Chem 2015; 13:7711-9. [DOI: 10.1039/c5ob00937e] [Citation(s) in RCA: 37] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
An l-proline-functionalised benzene-1,3,5-tricarboxamide derivative self-assembles in water into well-defined, one-dimensional, helical, supramolecular polymers that efficiently catalyse aldol reactions.
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Affiliation(s)
- Laura N. Neumann
- Laboratory for Macromolecular and Organic Chemistry
- Institute for Complex Molecular Sciences
- 5600 MB Eindhoven
- The Netherlands
| | - Matthew B. Baker
- Laboratory for Macromolecular and Organic Chemistry
- Institute for Complex Molecular Sciences
- 5600 MB Eindhoven
- The Netherlands
| | - Christianus M. A. Leenders
- Laboratory for Macromolecular and Organic Chemistry
- Institute for Complex Molecular Sciences
- 5600 MB Eindhoven
- The Netherlands
| | - Ilja K. Voets
- Laboratory for Macromolecular and Organic Chemistry
- Institute for Complex Molecular Sciences
- 5600 MB Eindhoven
- The Netherlands
| | - René P. M. Lafleur
- Laboratory for Macromolecular and Organic Chemistry
- Institute for Complex Molecular Sciences
- 5600 MB Eindhoven
- The Netherlands
| | - Anja R. A. Palmans
- Laboratory for Macromolecular and Organic Chemistry
- Institute for Complex Molecular Sciences
- 5600 MB Eindhoven
- The Netherlands
| | - E. W. Meijer
- Laboratory for Macromolecular and Organic Chemistry
- Institute for Complex Molecular Sciences
- 5600 MB Eindhoven
- The Netherlands
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108
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Nehlig E, Motte L, Guénin E. Magnetic nano-organocatalysts: impact of surface functionalization on catalytic activity. RSC Adv 2015. [DOI: 10.1039/c5ra20644h] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Nano-organocatalysts were synthesized using controlled click chemistry and studied in aldolization and Michael addition reactions. It was shown that small modifications of the nanosurface can have a drastic effect on the catalysis.
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Affiliation(s)
- E. Nehlig
- UFR SMBH
- Université Paris 13
- Sorbonne Paris Cité
- 93017 Bobigny Cedex
- France
| | - L. Motte
- UFR SMBH
- Université Paris 13
- Sorbonne Paris Cité
- 93017 Bobigny Cedex
- France
| | - E. Guénin
- UFR SMBH
- Université Paris 13
- Sorbonne Paris Cité
- 93017 Bobigny Cedex
- France
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109
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Hu XM, Zhang DX, Zhang SY, Wang PA. Highly modular dipeptide-like organocatalysts for direct asymmetric aldol reactions in brine. RSC Adv 2015. [DOI: 10.1039/c5ra07019h] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023] Open
Abstract
The dipeptide-like organocatalysts have been developed for asymmetric aldol reactions in brine to achieve high yields and enantioselectivities with 1 mol% catalyst-loading.
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Affiliation(s)
- Xiao-Mu Hu
- Department of Medicinal Chemistry
- School of Pharmacy
- The Fourth Military Medical University
- Xi'an
- P. R. China
| | - Dong-Xu Zhang
- Department of Medicinal Chemistry
- School of Pharmacy
- The Fourth Military Medical University
- Xi'an
- P. R. China
| | - Sheng-Yong Zhang
- Department of Medicinal Chemistry
- School of Pharmacy
- The Fourth Military Medical University
- Xi'an
- P. R. China
| | - Ping-An Wang
- Department of Medicinal Chemistry
- School of Pharmacy
- The Fourth Military Medical University
- Xi'an
- P. R. China
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110
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Valdivielso ÁM, Catot A, Alfonso I, Jimeno C. Intramolecular hydrogen bonding guides a cationic amphiphilic organocatalyst to highly stereoselective aldol reactions in water. RSC Adv 2015. [DOI: 10.1039/c5ra12135c] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
A novel amphiphilic acylguanidine organocatalyst using intramolecular hydrogen bonding as a key structural motif is efficient for asymmetric aldol reactions of ketones in water at neutral pH.
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Affiliation(s)
- Ángel M. Valdivielso
- Department of Biological Chemistry and Molecular Modelling
- Institute of Advanced Chemistry of Catalonia (IQAC-CSIC)
- E08034 Barcelona
- Spain
| | - Alba Catot
- Department of Biological Chemistry and Molecular Modelling
- Institute of Advanced Chemistry of Catalonia (IQAC-CSIC)
- E08034 Barcelona
- Spain
| | - Ignacio Alfonso
- Department of Biological Chemistry and Molecular Modelling
- Institute of Advanced Chemistry of Catalonia (IQAC-CSIC)
- E08034 Barcelona
- Spain
| | - Ciril Jimeno
- Department of Biological Chemistry and Molecular Modelling
- Institute of Advanced Chemistry of Catalonia (IQAC-CSIC)
- E08034 Barcelona
- Spain
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111
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Hazra S, Karmakar A, Guedes da Silva MDFC, Dlháň L, Boča R, Pombeiro AJL. Sulfonated Schiff base dinuclear and polymeric copper(ii) complexes: crystal structures, magnetic properties and catalytic application in Henry reaction. NEW J CHEM 2015. [DOI: 10.1039/c5nj00330j] [Citation(s) in RCA: 46] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
Aqueous medium syntheses and nitroaldol catalytic studies of three pseudohalide bridged copper(ii) complexes characterized by single crystal X-ray structure analysis and variable temperature magnetic studies are reported.
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Affiliation(s)
- Susanta Hazra
- Centro de Química Estrutural
- Complexo I, Instituto Superior Técnico
- Universidade de Lisboa
- Lisbon
- Portugal
| | - Anirban Karmakar
- Centro de Química Estrutural
- Complexo I, Instituto Superior Técnico
- Universidade de Lisboa
- Lisbon
- Portugal
| | | | - L'ubor Dlháň
- Institute of Inorganic Chemistry
- FCHPT
- Slovak University of Technology
- Bratislava
- Slovakia
| | - Roman Boča
- Department of Chemistry
- FPV
- University of SS Cyril and Methodius
- Trnava
- Slovakia
| | - Armando J. L. Pombeiro
- Centro de Química Estrutural
- Complexo I, Instituto Superior Técnico
- Universidade de Lisboa
- Lisbon
- Portugal
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112
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Nakashima K, Hirashima SI, Akutsu H, Koseki Y, Tada N, Itoh A, Miura T. Pyrrolidine–diaminomethylenemalononitrile organocatalyst for solvent-free asymmetric direct aldol reactions. Tetrahedron Lett 2015. [DOI: 10.1016/j.tetlet.2014.11.117] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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113
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Lu A, Moatsou D, Hands-Portman I, Longbottom DA, O’Reilly RK. Recyclable l-Proline Functional Nanoreactors with Temperature-Tuned Activity Based on Core-Shell Nanogels. ACS Macro Lett 2014; 3:1235-1239. [PMID: 35610832 DOI: 10.1021/mz500704y] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
Recyclable core-shell (CS) nanogels based on l-proline-containing hydrophobic cores with a thermoresponsive poly(N-isopropylacrylamide) (PNIPAM) shell have been synthesized via a seeded precipitation polymerization process. Dynamic light scattering (DLS) and transmission electron microscopy (TEM) were used to verify the successful addition of the shell and investigate the thermoresponsive properties of the nanostructures. The catalytic activity of the nanogels was assessed in a model asymmetric aldol reaction, where an enhancement was observed with increasing temperature, attributed to the hydrophobic nature of the PNIPAM shell. However, when a nanogel was synthesized with core-shell morphology based on a gradient of cross-linking density in the corona (GS), a dramatic drop in activity was observed at elevated temperatures: the collapse of the outer, lightly cross-linked, "corona" polymer chains appears to block access to the catalytic core. High activity and enantioselectivity were maintained in a number of recovery and reuse cycles, highlighting the recycling potential of these catalytic nanostructures.
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Affiliation(s)
- Annhelen Lu
- Department
of Chemistry, University of Warwick, Gibbet Hill Road, Coventry CV4 7AL, United Kingdom
| | - Dafni Moatsou
- Department
of Chemistry, University of Warwick, Gibbet Hill Road, Coventry CV4 7AL, United Kingdom
| | - Ian Hands-Portman
- School
of Life Sciences, University of Warwick, Gibbet Hill Road, Coventry CV4 7AL, United Kingdom
| | - Deborah A. Longbottom
- Department
of Chemistry, University of Cambridge, Lensfield Road, Cambridge CB2 1EW, United Kingdom
| | - Rachel K. O’Reilly
- Department
of Chemistry, University of Warwick, Gibbet Hill Road, Coventry CV4 7AL, United Kingdom
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114
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Huang XR, Liu Q, Wang J, Xiao JA, Yang H. Solvent-effects tuning the catalytic reactivity of prolinamides in asymmetric aldol reactions. ACTA ACUST UNITED AC 2014. [DOI: 10.1016/j.tetasy.2014.10.019] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
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115
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Szcześniak P, Październiok-Holewa A, Klimczak U, Stecko S. Synthesis of β- and γ-Hydroxy α-Amino Acids via Enzymatic Kinetic Resolution and Cyanate-to-Isocyanate Rearrangement. J Org Chem 2014; 79:11700-13. [DOI: 10.1021/jo502026a] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
Affiliation(s)
- Piotr Szcześniak
- Institute
of Organic Chemistry, Polish Academy of Sciences, Kasprzaka 44/52, 01-224 Warsaw, Poland
| | - Agnieszka Październiok-Holewa
- Department
of Organic Chemistry, Bioorganic Chemistry and Biotechnology, Silesian University of Technology, Krzywoustego 4, 44-100 Gliwice, Poland
| | - Urszula Klimczak
- Institute
of Organic Chemistry, Polish Academy of Sciences, Kasprzaka 44/52, 01-224 Warsaw, Poland
| | - Sebastian Stecko
- Institute
of Organic Chemistry, Polish Academy of Sciences, Kasprzaka 44/52, 01-224 Warsaw, Poland
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116
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Yu L, Yang Q, Li P. Phase-Transfer-Catalyst-Mediated Domino Reaction of γ-Nitro Ketones with Chalcones: Approach to Functionalized Six-Membered-Ring Carbocycles. European J Org Chem 2014. [DOI: 10.1002/ejoc.201403075] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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117
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Fan X, Rodríguez-Escrich C, Wang S, Sayalero S, Pericàs MA. Highly enantioselective cross-aldol reactions of acetaldehyde mediated by a dual catalytic system operating under site isolation. Chemistry 2014; 20:13089-93. [PMID: 25168085 DOI: 10.1002/chem.201404215] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/02/2014] [Indexed: 11/07/2022]
Abstract
Polystyrene-supported (PS) diarylprolinol catalysts 1 a (Ar = phenyl) and 1 b (Ar = 3,5-bis(trifluoromethyl)phenyl) have been developed. Operating under site-isolation conditions, PS-1 a/1 b worked compatibly with PS-bound sulfonic acid catalyst 2 to promote deoligomerization of paraldehyde and subsequent cross-aldol reactions of the resulting acetaldehyde in one pot, affording aldol products in high yields with excellent enantioselectivities. The effect of water on the performance of the catalytic system has been studied and its optimal amount (0.5 equiv) has been determined. The dual catalytic system (1/2) allows repeated recycling and reuse (10 cycles). The potential of this methodology is demonstrated by a two-step synthesis of a phenoperidine analogue (68% overall yield; 98% ee) and by the preparation of highly enantioenriched 1,3-diols 4 and 3-methylamino-1-arylpropanols 5, key intermediates in the synthesis of a variety of druglike structures.
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Affiliation(s)
- Xinyuan Fan
- Institute of Chemical Research of Catalonia (ICIQ), Avinguda Països Catalans 16, 43007, Tarragona (Spain), Fax: (+34) 977-920-243
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118
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Faísca Phillips AM. Applications of Carbohydrate-Based Organocatalysts in Enantioselective Synthesis. European J Org Chem 2014. [DOI: 10.1002/ejoc.201402689] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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119
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Bhowmick S, Kunte SS, Bhowmick KC. A new organocatalyst derived from abietic acid and 4-hydroxy-l-proline for direct asymmetric aldol reactions in aqueous media. ACTA ACUST UNITED AC 2014. [DOI: 10.1016/j.tetasy.2014.07.012] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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120
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Abbasov ME, Romo D. The ever-expanding role of asymmetric covalent organocatalysis in scalable, natural product synthesis. Nat Prod Rep 2014; 31:1318-27. [PMID: 25042097 PMCID: PMC5470744 DOI: 10.1039/c4np00025k] [Citation(s) in RCA: 68] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
Following the turn of the millennium, the role of asymmetric covalent organocatalysis has developed into a scalable, synthetic paradigm galvanizing the synthetic community toward utilization of these methods toward more practical, metal-free syntheses of natural products. A myriad of reports on asymmetric organocatalytic modes of substrate activation relying on small, exclusively organic molecules are delineating what has now become the multifaceted field of organocatalysis. In covalent catalysis, the catalyst and substrate combine to first form a covalent, activated intermediate that enters the catalytic cycle. Following asymmetric bond formation, the chiral catalyst is recycled through hydrolysis or displacement by a pendant group on the newly formed product. Amine- and phosphine-based organocatalysts are the most common examples that have led to a vast array of reaction types. This Highlight provides a brief overview of covalent modes of organocatalysis and applications of scalable versions of these methods applied to the total synthesis of natural products including examples from our own laboratory.
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Affiliation(s)
- Mikail E Abbasov
- Department of Chemistry, Texas A&M University, P.O. Box 30012, College Station, Texas, United States.
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121
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Rodríguez-Gimeno A, Cuenca AB, Gil-Tomás J, Medio-Simón M, Olmos A, Asensio G. FeCl3·6H2O-Catalyzed Mukaiyama-Aldol Type Reactions of Enolizable Aldehydes and Acetals. J Org Chem 2014; 79:8263-70. [DOI: 10.1021/jo501498a] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
Affiliation(s)
- Alejandra Rodríguez-Gimeno
- Departamento
de Química Orgánica, Universidad de Valencia, Avda. Vicente Andrés
Estellés, s/n 46100 Burjassot, Valencia, Spain
| | - Ana B. Cuenca
- Departamento
de Química Orgánica, Universidad de Valencia, Avda. Vicente Andrés
Estellés, s/n 46100 Burjassot, Valencia, Spain
| | - Jesús Gil-Tomás
- Departamento
de Química Orgánica, Universidad de Valencia, Avda. Vicente Andrés
Estellés, s/n 46100 Burjassot, Valencia, Spain
| | - Mercedes Medio-Simón
- Departamento
de Química Orgánica, Universidad de Valencia, Avda. Vicente Andrés
Estellés, s/n 46100 Burjassot, Valencia, Spain
| | - Andrea Olmos
- Laboratorio
de Catálisis Homogénea, Unidad Asociada al CSIC, CIQSO-Centro
de Investigación en Química Sostenible, Universidad de Huelva, Campus El Carmen, 21007 Huelva, Spain
| | - Gregorio Asensio
- Departamento
de Química Orgánica, Universidad de Valencia, Avda. Vicente Andrés
Estellés, s/n 46100 Burjassot, Valencia, Spain
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122
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Karmakar A, Hazra S, Guedes da Silva MFC, Pombeiro AJL. Synthesis, structure and catalytic applications of amidoterephthalate copper complexes in the diastereoselective Henry reaction in aqueous medium. NEW J CHEM 2014. [DOI: 10.1039/c4nj00878b] [Citation(s) in RCA: 44] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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123
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Bai L, Zhang X, Ma N. Water-Promoted Ring-Opening Reactions ofN-Substituted Saccharins and Phthalimides by Amines. CHINESE J CHEM 2014. [DOI: 10.1002/cjoc.201400253] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
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124
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Lafantaisie M, Mirabaud A, Plancq B, Ollevier T. Iron(II)-Derived Lewis Acid/Surfactant Combined Catalysis for the Enantioselective Mukaiyama Aldol Reaction in Pure Water. ChemCatChem 2014. [DOI: 10.1002/cctc.201402029] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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125
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Nodzewska A, Bokina A, Romanowska K, Lazny R. Environmentally benign diastereoselective synthesis of granatane and tropane aldol derivatives. RSC Adv 2014. [DOI: 10.1039/c4ra02834a] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
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126
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Popik O, Pasternak-Suder M, Leśniak K, Jawiczuk M, Górecki M, Frelek J, Mlynarski J. Amine-catalyzed direct aldol reactions of hydroxy- and dihydroxyacetone: biomimetic synthesis of carbohydrates. J Org Chem 2014; 79:5728-39. [PMID: 24837738 DOI: 10.1021/jo500860g] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
This article presents comprehensive studies on the application of primary, secondary, and tertiary amines as efficient organocatalysts for the de novo synthesis of ketoses and deoxyketoses. Mimicking the actions of aldolase enzymes, the synthesis of selected carbohydrates was accomplished in aqueous media by using proline- and serine-based organocatalysts. The presented methodology also provides direct access to unnatural L-carbohydrates from the (S)-glyceraldehyde precursor. Determination of the absolute configuration of all obtained sugars was feasible using a methodology consisting of concerted ECD and VCD spectroscopy.
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Affiliation(s)
- Oskar Popik
- Institute of Organic Chemistry, Polish Academy of Sciences , Kasprzaka 44/52, 01-224 Warsaw, Poland
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127
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Carneros H, Sánchez D, Vilarrasa J. Transfer of 1-Alkenyl Groups between Secondary Amines. Relative Stability and Reactivity of Enamines from Popular Organocatalysts. Org Lett 2014; 16:2900-3. [DOI: 10.1021/ol501044u] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Affiliation(s)
- Héctor Carneros
- Departament
de Química
Orgànica, Facultat de Química, Universitat de Barcelona, Diagonal 645, 08028 Barcelona, Catalonia, Spain
| | - Dani Sánchez
- Departament
de Química
Orgànica, Facultat de Química, Universitat de Barcelona, Diagonal 645, 08028 Barcelona, Catalonia, Spain
| | - Jaume Vilarrasa
- Departament
de Química
Orgànica, Facultat de Química, Universitat de Barcelona, Diagonal 645, 08028 Barcelona, Catalonia, Spain
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128
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Rogozińska-Szymczak M, Mlynarski J. Asymmetric synthesis of warfarin and its analogues on water. ACTA ACUST UNITED AC 2014. [DOI: 10.1016/j.tetasy.2014.04.008] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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129
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Curvey N, Widaman AK, Rath NP, Bauer EB. Ruthenium complexes of the general formula [RuCl2(PHOX)2] and their catalytic activity in the Mukaiyama aldol reaction. Tetrahedron Lett 2014. [DOI: 10.1016/j.tetlet.2014.03.111] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
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130
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Design and synthesis of chiral Zn2+ complexes mimicking natural aldolases for catalytic C-C bond forming reactions in aqueous solution. Int J Mol Sci 2014; 15:2087-118. [PMID: 24481060 PMCID: PMC3958839 DOI: 10.3390/ijms15022087] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/29/2013] [Revised: 01/15/2014] [Accepted: 01/16/2014] [Indexed: 01/05/2023] Open
Abstract
Extending carbon frameworks via a series of C-C bond forming reactions is essential for the synthesis of natural products, pharmaceutically active compounds, active agrochemical ingredients, and a variety of functional materials. The application of stereoselective C-C bond forming reactions to the one-pot synthesis of biorelevant compounds is now emerging as a challenging and powerful strategy for improving the efficiency of a chemical reaction, in which some of the reactants are subjected to successive chemical reactions in just one reactor. However, organic reactions are generally conducted in organic solvents, as many organic molecules, reagents, and intermediates are not stable or soluble in water. In contrast, enzymatic reactions in living systems proceed in aqueous solvents, as most of enzymes generally function only within a narrow range of temperature and pH and are not so stable in less polar organic environments, which makes it difficult to conduct chemoenzymatic reactions in organic solvents. In this review, we describe the design and synthesis of chiral metal complexes with Zn2+ ions as a catalytic factor that mimic aldolases in stereoselective C-C bond forming reactions, especially for enantioselective aldol reactions. Their application to chemoenzymatic reactions in aqueous solution is also presented.
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Hayashi Y. The Asymmetric Catalytic Mannich Reaction Catalyzed by Organocatalyst ^|^mdash; A Personal Account ^|^mdash;. J SYN ORG CHEM JPN 2014. [DOI: 10.5059/yukigoseikyokaishi.72.1228] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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