1
|
Abstract
Rhododendrol (RD) is a naturally occurring phenolic compound found in many plants. Tyrosinase (Ty) converts RD to RD-catechol and subsequently RD-quinone via two-step oxidation reactions, after which RD-melanin forms spontaneously from RD-quinone. RD is cytotoxic in melanocytes and lung cancer cells, but not in keratinocytes and fibroblasts. However, the function of RD metabolites has not been possible to investigate due to the lack of available high purity metabolites. In this study, an enzymatic strategy for RD-catechol production was devised using engineered cytochrome P450 102A1 (CYP102A1) and Ty, and the product was analyzed using high-performance liquid chromatography (HPLC), LC-MS, and NMR spectroscopy. Engineered CYP102A1 regioselectively produced RD-catechol via hydroxylation at the ortho position of RD. Although RD-quinone was subsequently formed by two step oxidation in Ty catalyzed reactions, L-ascorbic acid (LAA) inhibited RD-quinone formation and contributed to regioselective production of RD-catechol. When LAA was present, the productivity of RD-catechol by Ty was 5.3-fold higher than that by engineered CYP102A1. These results indicate that engineered CYP102A1 and Ty can be used as effective biocatalysts to produce hydroxylated products, and Ty is a more cost-effective biocatalyst for industrial applications than engineered CYP102A1.
Collapse
|
2
|
Eftekhari-Sis B, Mohajer S, Zirak M, Mahdavinia GR, Büyükgüngör O. Switching diastereoselectivity of direct Mannich-type reaction of cyclic ketones by polymeric laponite nanoclay catalyst. JOURNAL OF THE IRANIAN CHEMICAL SOCIETY 2015. [DOI: 10.1007/s13738-015-0772-z] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
|
3
|
Bai L, Zhang L, Pan J, Zhu J, Cheng Z, Zhu X. Developing a Synthetic Approach with Thermoregulated Phase-Transfer Catalysis: Facile Access to Metal-Mediated Living Radical Polymerization of Methyl Methacrylate in Aqueous/Organic Biphasic System. Macromolecules 2013. [DOI: 10.1021/ma4000489] [Citation(s) in RCA: 54] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Affiliation(s)
- Liangjiu Bai
- Jiangsu Key Laboratory of Advanced Functional Polymer
Design and Application, Department of Polymer Science and Engineering,
College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou 215123, China
| | - Lifen Zhang
- Jiangsu Key Laboratory of Advanced Functional Polymer
Design and Application, Department of Polymer Science and Engineering,
College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou 215123, China
| | - Jinlong Pan
- Jiangsu Key Laboratory of Advanced Functional Polymer
Design and Application, Department of Polymer Science and Engineering,
College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou 215123, China
| | - Jian Zhu
- Jiangsu Key Laboratory of Advanced Functional Polymer
Design and Application, Department of Polymer Science and Engineering,
College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou 215123, China
| | - Zhenping Cheng
- Jiangsu Key Laboratory of Advanced Functional Polymer
Design and Application, Department of Polymer Science and Engineering,
College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou 215123, China
| | - Xiulin Zhu
- Jiangsu Key Laboratory of Advanced Functional Polymer
Design and Application, Department of Polymer Science and Engineering,
College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou 215123, China
| |
Collapse
|
4
|
Reuss VS, Obermeier B, Dingels C, Frey H. N,N-Diallylglycidylamine: A Key Monomer for Amino-Functional Poly(ethylene glycol) Architectures. Macromolecules 2012. [DOI: 10.1021/ma300292m] [Citation(s) in RCA: 41] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Valerie S. Reuss
- Department
of Organic Chemistry, Johannes Gutenberg-Universität Mainz, Duesbergweg
10-14, 55099 Mainz, Germany
- Graduate School “Materials Science in Mainz”, Staudingerweg
9, 55099 Mainz, Germany
| | - Boris Obermeier
- Department
of Organic Chemistry, Johannes Gutenberg-Universität Mainz, Duesbergweg
10-14, 55099 Mainz, Germany
| | - Carsten Dingels
- Department
of Organic Chemistry, Johannes Gutenberg-Universität Mainz, Duesbergweg
10-14, 55099 Mainz, Germany
| | - Holger Frey
- Department
of Organic Chemistry, Johannes Gutenberg-Universität Mainz, Duesbergweg
10-14, 55099 Mainz, Germany
| |
Collapse
|
5
|
Abd-El-Aziz A, Dalgakiran S. Metal-Containing Macromolecules. POLYMER SCIENCE: A COMPREHENSIVE REFERENCE 2012:637-688. [DOI: 10.1016/b978-0-444-53349-4.00155-2] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 09/01/2023]
|
6
|
Affiliation(s)
- George R. Newkome
- Departments of Polymer Science and Chemistry, University of Akron, Akron, Ohio 44325-4717, and Department of Chemistry, Hiram College, Hiram, Ohio 44234
| | - Carol Shreiner
- Departments of Polymer Science and Chemistry, University of Akron, Akron, Ohio 44325-4717, and Department of Chemistry, Hiram College, Hiram, Ohio 44234
| |
Collapse
|
7
|
Che J, Lam Y. Polymer-Supported Hantzsch 1,4-Dihydropyridine Ester: An Efficient Biomimetic Hydrogen Source for the Reduction of Ketimines and Electron-Withdrawing Group Conjugated Olefins. Adv Synth Catal 2010. [DOI: 10.1002/adsc.201000093] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
|
8
|
Gupta K, Kumar Sutar A, Lin CC. Polymer-supported Schiff base complexes in oxidation reactions. Coord Chem Rev 2009. [DOI: 10.1016/j.ccr.2009.03.019] [Citation(s) in RCA: 309] [Impact Index Per Article: 20.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
|
9
|
Nunes RM, Fernandes TF, Carvalho GA, dos Santos EN, Moreno MJS, Piedade A, Pereira MM. Recyclable immobilized rhodium catalysts in the diastereoselective hydrogenation of unsaturated steroids. ACTA ACUST UNITED AC 2009. [DOI: 10.1016/j.molcata.2009.03.016] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
|
10
|
Jiang CJ, Chen ZR. Chiral cobalt salen complexes containing Lewis acid: A highly reactive and enantioselective catalyst for the hydrolytic kinetic resolution of terminal epoxides. KINETICS AND CATALYSIS 2008. [DOI: 10.1134/s0023158408040034] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
|
11
|
He R, Toy P, Lam Y. Polymer-Supported Hantzsch 1,4-Dihydropyridine Ester: An Efficient Biomimetic Hydrogen Source. Adv Synth Catal 2008. [DOI: 10.1002/adsc.200700344] [Citation(s) in RCA: 38] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
|
12
|
Effective and Reusable Pt Catalysts Supported on Periodic Mesoporous Resols for Chiral Hydrogenation. Catal Letters 2007. [DOI: 10.1007/s10562-007-9381-5] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
|
13
|
Pasini D, Filippini M, Pianetti I, Pregnolato M. Efficient Biocatalytic Cleavage and Recovery of Organic Substrates Supported on Soluble Polymers. Adv Synth Catal 2007. [DOI: 10.1002/adsc.200600376] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
|
14
|
Constable DJC, Jimenez-Gonzalez C, Henderson RK. Perspective on Solvent Use in the Pharmaceutical Industry. Org Process Res Dev 2006. [DOI: 10.1021/op060170h] [Citation(s) in RCA: 425] [Impact Index Per Article: 23.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- David J. C. Constable
- GlaxoSmithKline Pharmaceuticals, One Franklin Plaza, Philadelphia, Pennsylvania 19101, U.S.A., GlaxoSmithKline Pharmaceuticals, Five Moore Drive, Research Triangle Park, North Carolina 27709, U.S.A., and GlaxoSmithKline Pharmaceuticals, Park Road, Ware, Hertfordshire SG12 ODP, United Kingdom
| | - Conchita Jimenez-Gonzalez
- GlaxoSmithKline Pharmaceuticals, One Franklin Plaza, Philadelphia, Pennsylvania 19101, U.S.A., GlaxoSmithKline Pharmaceuticals, Five Moore Drive, Research Triangle Park, North Carolina 27709, U.S.A., and GlaxoSmithKline Pharmaceuticals, Park Road, Ware, Hertfordshire SG12 ODP, United Kingdom
| | - Richard K. Henderson
- GlaxoSmithKline Pharmaceuticals, One Franklin Plaza, Philadelphia, Pennsylvania 19101, U.S.A., GlaxoSmithKline Pharmaceuticals, Five Moore Drive, Research Triangle Park, North Carolina 27709, U.S.A., and GlaxoSmithKline Pharmaceuticals, Park Road, Ware, Hertfordshire SG12 ODP, United Kingdom
| |
Collapse
|
15
|
|
16
|
Thibaud S, Moine L, Degueil M, Maillard B. Synthesis of well-defined soluble polystyrene supports: Impact of polymer chain on grafted organotin reagent activity. Eur Polym J 2006. [DOI: 10.1016/j.eurpolymj.2005.12.023] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
|
17
|
A poly(ethylene glycol)-supported quaternary ammonium salt for highly efficient and environmentally friendly chemical fixation of CO2 with epoxides under supercritical conditions. Tetrahedron Lett 2006. [DOI: 10.1016/j.tetlet.2005.12.077] [Citation(s) in RCA: 112] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
|
18
|
Turmanova S, Vassilev K, Atanassov A. Synthesis and properties of metal complexes of radiation grafted carboxyl containing copolymers. J Appl Polym Sci 2006. [DOI: 10.1002/app.24051] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
|
19
|
Heck and Suzuki coupling reactions in water using poly(2-oxazoline)s functionalized with palladium carbene complexes as soluble, amphiphilic polymer supports. J Organomet Chem 2005. [DOI: 10.1016/j.jorganchem.2005.07.053] [Citation(s) in RCA: 87] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
|
20
|
Kureshy RI, Singh S, Khan NUH, Abdi SHR, Ahmad I, Bhatt A, Jasra RV. Improved catalytic activity of homochiral dimeric cobalt-salen complex in hydrolytic kinetic resolution of terminal racemic epoxides. Chirality 2005; 17:590-4. [PMID: 16200537 DOI: 10.1002/chir.20196] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Abstract
Enantiomerically pure epoxides (99%, ee) and diols (98%, ee) from racemic epichlorohydrin, 1,2-epoxypropane, 1,2-epoxyhexane, 1,2-epoxyoctane, and 1,2-epoxydodecane were obtained in 2-12 h by hydrolytic kinetic resolution (HKR) using the recyclable dimeric homochiral Co(III)-salen complex 1' (0.2 mol %) derived from 5,5-(2',2'-dimethylpropane)-di-[(R,R)-{N-(3-tert-butylsalicylidine)-N'-(3',5'-di-tert-butylsalicylidine)}-1,2-cyclohexanediamine] with cobalt(II) acetate. Unlike its monomeric version, the catalyst could be recycled several times without loss in performance. The use of BF(4) as counter ion in HKR reactions was also investigated.
Collapse
Affiliation(s)
- Rukhsana I Kureshy
- Silicates and Catalysis Discipline, Central Salt and Marine Chemicals Research Institute (CSMCRI), Bhavnagar, India.
| | | | | | | | | | | | | |
Collapse
|
21
|
Schönfelder D, Fischer K, Schmidt M, Nuyken O, Weberskirch R. Poly(2-oxazoline)s Functionalized with Palladium Carbene Complexes: Soluble, Amphiphilic Polymer Supports for C−C Coupling Reactions in Water. Macromolecules 2004. [DOI: 10.1021/ma048142r] [Citation(s) in RCA: 82] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Daniel Schönfelder
- TU München, Department Chemie, Lehrstuhl für Makromolekulare Stoffe, Lichtenbergstr. 4, D-85747 Garching, Germany and Johannes-Gutenberg Universität Mainz, Institut für Physikalische Chemie, D-55099 Mainz, Germany
| | - Karl Fischer
- TU München, Department Chemie, Lehrstuhl für Makromolekulare Stoffe, Lichtenbergstr. 4, D-85747 Garching, Germany and Johannes-Gutenberg Universität Mainz, Institut für Physikalische Chemie, D-55099 Mainz, Germany
| | - Manfred Schmidt
- TU München, Department Chemie, Lehrstuhl für Makromolekulare Stoffe, Lichtenbergstr. 4, D-85747 Garching, Germany and Johannes-Gutenberg Universität Mainz, Institut für Physikalische Chemie, D-55099 Mainz, Germany
| | - Oskar Nuyken
- TU München, Department Chemie, Lehrstuhl für Makromolekulare Stoffe, Lichtenbergstr. 4, D-85747 Garching, Germany and Johannes-Gutenberg Universität Mainz, Institut für Physikalische Chemie, D-55099 Mainz, Germany
| | - Ralf Weberskirch
- TU München, Department Chemie, Lehrstuhl für Makromolekulare Stoffe, Lichtenbergstr. 4, D-85747 Garching, Germany and Johannes-Gutenberg Universität Mainz, Institut für Physikalische Chemie, D-55099 Mainz, Germany
| |
Collapse
|
22
|
Roller S, Siegers C, Haag R. Dendritic polyglycerol as a high-loading support for parallel multistep synthesis of GABA lactam analogues. Tetrahedron 2004. [DOI: 10.1016/j.tet.2004.05.108] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
|
23
|
Bastin S, Eaves RJ, Edwards CW, Ichihara O, Whittaker M, Wills M. A Soluble-Polymer System for the Asymmetric Transfer Hydrogenation of Ketones. J Org Chem 2004; 69:5405-12. [PMID: 15287789 DOI: 10.1021/jo049479u] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
The appropriate combination of methacrylate polymers permits the synthesis of a soluble polymer for use in ruthenium(II)-catalyzed asymmetric transfer hydrogenation reactions. Using a 7:3 copolymer of a poly(ethylene glycol) ester and a hydroxyethyl ester, a derived ruthenium(II)/norephedrine complex catalyses reduction of acetophenone in up to 95% yield and 81% ee.
Collapse
Affiliation(s)
- Stephanie Bastin
- Department of Chemistry, University of Warwick, Coventry CV4 7AL, U.K
| | | | | | | | | | | |
Collapse
|
24
|
Datta A, Ebert K, Plenio H. Nanofiltration for Homogeneous Catalysis Separation: Soluble Polymer-Supported Palladium Catalysts for Heck, Sonogashira, and Suzuki Coupling of Aryl Halides. Organometallics 2003. [DOI: 10.1021/om0303754] [Citation(s) in RCA: 132] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Anupama Datta
- Institut für Anorganische und Physikalische Chemie, Technische Universität Darmstadt, Petersenstrasse 18, 64287 Darmstadt, Germany, and GKSS Forschungszentrum Geesthacht GmbH, Institut für Chemie, Max-Planck-Strasse 1, 21502 Geesthacht, Germany
| | - Katrin Ebert
- Institut für Anorganische und Physikalische Chemie, Technische Universität Darmstadt, Petersenstrasse 18, 64287 Darmstadt, Germany, and GKSS Forschungszentrum Geesthacht GmbH, Institut für Chemie, Max-Planck-Strasse 1, 21502 Geesthacht, Germany
| | - Herbert Plenio
- Institut für Anorganische und Physikalische Chemie, Technische Universität Darmstadt, Petersenstrasse 18, 64287 Darmstadt, Germany, and GKSS Forschungszentrum Geesthacht GmbH, Institut für Chemie, Max-Planck-Strasse 1, 21502 Geesthacht, Germany
| |
Collapse
|
25
|
Highly enantioselective resolution of terminal epoxides with cross-linked polymeric salen–Co(III) complexes. Tetrahedron Lett 2003. [DOI: 10.1016/s0040-4039(03)01786-6] [Citation(s) in RCA: 30] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
|
26
|
Remmele H, Köllhofer A, Plenio H. Recyclable Catalyst with Cationic Phase Tags for the Sonogashira Coupling of Aryl Bromides and Aryl Chlorides. Organometallics 2003. [DOI: 10.1021/om030450a] [Citation(s) in RCA: 51] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Harry Remmele
- Institut für Anorganische und Physikalische Chemie, Technische Universität Darmstadt, Petersenstr. 18, 64287 Darmstadt, Germany
| | - Axel Köllhofer
- Institut für Anorganische und Physikalische Chemie, Technische Universität Darmstadt, Petersenstr. 18, 64287 Darmstadt, Germany
| | - Herbert Plenio
- Institut für Anorganische und Physikalische Chemie, Technische Universität Darmstadt, Petersenstr. 18, 64287 Darmstadt, Germany
| |
Collapse
|
27
|
Anyanwu UK, Venkataraman D. Effect of spacers on the activity of soluble polymer supported catalysts for the asymmetric addition of diethylzinc to aldehydes. Tetrahedron Lett 2003. [DOI: 10.1016/s0040-4039(03)01588-0] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
|
28
|
Bergbreiter DE, Hughes R, Besinaiz J, Li C, Osburn PL. Phase-selective solubility of poly(N-alkylacrylamide)s. J Am Chem Soc 2003; 125:8244-9. [PMID: 12837095 DOI: 10.1021/ja0349498] [Citation(s) in RCA: 50] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
The extent of the phase-selective solubility of poly(N-alkylacrylamide)s was studied by UV-vis and fluorescence spectroscopy using poly(N-isopropylacrylamide) and poly(N-octadecylacrylamide) as representative polar and nonpolar poly(N-alkylacrylamide)s in a mixture of polar and nonpolar thermomorphic solvents. Phase-selective solubilities of greater than 10000:1 were seen with each labeled polymer in polar and nonpolar solvents such as heptane and DMF or heptane and 90% EtOH-H(2)O. Using a poly(N-acryloxysuccinimide) as a common precursor, a pool-split synthesis was devised to prepare a library of poly(N-alkylacrylamide)s whose members varied only in the size of their N-alkyl substituent. The solubilities of these library members were measured in both the polar and nonpolar phases of a thermomorphic heptane/90% EtOH-H(2)O mixture at 25 degrees C. Such solvent mixtures are miscible hot (70 degrees C) and biphasic cold (25 degrees C). The results show that poly(N-pentylacrylamide) is selectively soluble (>99.5%) in the polar EtOH-rich phase at rest. Poly(N-alkylacrylamide)s with larger N-alkyl groups are predominantly (C(6), 85%; C(7), 95%) or exclusively (>C(8), >99.5%) in the heptane-rich phase at rest.
Collapse
Affiliation(s)
- David E Bergbreiter
- Department of Chemistry, Texas A&M University, P.O. Box 30012, College Station, TX 77842-3012, USA.
| | | | | | | | | |
Collapse
|
29
|
Edwards CW, Haddleton DM, Morsley D, Shipton MR, Wills M. Synthesis and preliminary studies on a novel class of soluble amino alcohol reagents based on methacrylate copolymers. Tetrahedron 2003. [DOI: 10.1016/s0040-4020(03)00975-x] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
|
30
|
Sljivancanin Z, Gothelf KV, Hammer B. Density functional theory study of enantiospecific adsorption at chiral surfaces. J Am Chem Soc 2002; 124:14789-94. [PMID: 12465992 DOI: 10.1021/ja027239v] [Citation(s) in RCA: 59] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Density functional theory calculations are carried out for the adsorption of a chiral molecule, (S)- and (R)-HSCH(2)CHNH(2)CH(2)P(CH(3))(2), on a chiral surface, Au(17 11 9)(S)(). The S-enantiomer is found to bind more strongly than the R-enantiomer by 8.8 kJ/mol, evidencing that the chiral nature of the kink sites at the Au(17 11 9) surface leads to enantiospecific binding. The adsorption of two related chiral molecules, HSCH(2)CHNH(2)COOH ("cysteine") and HSCH(2)CHNH(2)CH(2)NH(2), does not, however, lead to enantiospecific binding. The results of the density functional calculations are broken down into a local binding model in which each of the chiral molecule's three contact points with the surface provides a contribution to the overall adsorption bond strength. The enantiospecific binding is demonstrated to originate from the simultaneous optimization of these three local bonds. In the model, the deformation energy costs of both the molecule and the surface are further included. The model reveals that the molecule may undergo large deformations in the attempt to optimize the three bonds, while the surface deforms to a lesser extent. The most favorable binding configurations of each enantiomer are, however, characterized by small deformation energies only, justifying a local binding picture.
Collapse
Affiliation(s)
- Zeljko Sljivancanin
- Interdisciplinary Nanoscience Center (iNANO), Institute of Physics and Astronomy, and Center for Catalysis, Department of Chemistry, University of Aarhus, DK-8000 Aarhus C, Denmark
| | | | | |
Collapse
|
31
|
Affiliation(s)
- David E Bergbreiter
- Department of Chemistry, Texas A&M University, P.O. Box 30012, College Station, Texas 77842-3012, USA.
| |
Collapse
|
32
|
Affiliation(s)
- Jun-Ichi Yoshida
- Department of Synthetic Chemistry and Biological Chemistry, Graduate School of Engineering, Kyoto University, Yoshida, Kyoto 606-8501, Japan.
| | | |
Collapse
|
33
|
Song Y, Yao X, Chen H, Bai C, Hu X, Zheng Z. Highly enantioselective resolution of terminal epoxides using polymeric catalysts. Tetrahedron Lett 2002. [DOI: 10.1016/s0040-4039(02)01446-6] [Citation(s) in RCA: 45] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
|
34
|
A soluble polymer-bound Evans’ chiral auxiliary: synthesis, characterization and use in cycloaddition reactions. ACTA ACUST UNITED AC 2002. [DOI: 10.1016/s0957-4166(02)00117-9] [Citation(s) in RCA: 31] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
|