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Wang X, Liu Y, Wei J, Chen L, Li Y. Asymmetric Synthesis of α‐Amino Acids Bearing a 3‐Alkyloxindole Structural Motif. ChemistrySelect 2021. [DOI: 10.1002/slct.202102857] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Xiao‐Ping Wang
- School of Chemistry and Chemical Engineering Shanghai University of Engineering Science 333 Longteng Road Shanghai 201620 China
| | - Yong‐Liang Liu
- School of Chemistry and Chemical Engineering Shanghai University of Engineering Science 333 Longteng Road Shanghai 201620 China
| | - Jie Wei
- School of Chemistry and Chemical Engineering Shanghai University of Engineering Science 333 Longteng Road Shanghai 201620 China
| | - Ling‐Yan Chen
- School of Chemistry and Chemical Engineering Shanghai University of Engineering Science 333 Longteng Road Shanghai 201620 China
| | - Ya Li
- School of Chemistry and Chemical Engineering Shanghai University of Engineering Science 333 Longteng Road Shanghai 201620 China
- Shanghai Frontiers Science Research Center for Druggability of Cardiovascular noncoding RNA Institute for Frontier Medical Technology Shanghai University of Engineering Science 333 Longteng Road Shanghai 201620 China
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2
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Meng B, Shi Q, Meng Y, Chen J, Cao W, Wu X. Asymmetric catalytic alkynylation of thiazolones and azlactones for synthesis of quaternary α-amino acid precursors. Org Biomol Chem 2021; 19:5087-5092. [PMID: 34037046 DOI: 10.1039/d1ob00582k] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
Asymmetric alkynylation of thiazolones and azlactones with alkynylbenziodoxolones as the electrophilic alkyne source catalyzed by thiourea phosphonium salt is described. By using thiazolones as nucleophiles, the desired alkyne functionalized thiazolones were obtained in 55-89% yields with 31-86% ee. Azlactones gave the desired products in comparable yields with lower enantioselectivities. Ring-opening of the alkynylation products led to α,α-disubstituted α-amino acid derivatives efficiently without loss of enantioselectivity.
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Affiliation(s)
- Beibei Meng
- Center for Supramolecular Chemistry and Catalysis and Department of Chemistry, College of Sciences, Shanghai University, 99 Shangda Lu, Shanghai 200444, People's Republic of China.
| | - Qian Shi
- Center for Supramolecular Chemistry and Catalysis and Department of Chemistry, College of Sciences, Shanghai University, 99 Shangda Lu, Shanghai 200444, People's Republic of China.
| | - Yuan Meng
- Center for Supramolecular Chemistry and Catalysis and Department of Chemistry, College of Sciences, Shanghai University, 99 Shangda Lu, Shanghai 200444, People's Republic of China.
| | - Jie Chen
- Center for Supramolecular Chemistry and Catalysis and Department of Chemistry, College of Sciences, Shanghai University, 99 Shangda Lu, Shanghai 200444, People's Republic of China.
| | - Weiguo Cao
- Center for Supramolecular Chemistry and Catalysis and Department of Chemistry, College of Sciences, Shanghai University, 99 Shangda Lu, Shanghai 200444, People's Republic of China.
| | - Xiaoyu Wu
- Center for Supramolecular Chemistry and Catalysis and Department of Chemistry, College of Sciences, Shanghai University, 99 Shangda Lu, Shanghai 200444, People's Republic of China.
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3
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Affiliation(s)
- Liang Wei
- Engineering Research Center of Organosilicon Compounds & Materials, Ministry of Education, College of Chemistry and Molecular Sciences, Wuhan University Wuhan Hubei 430072 China
| | - Chun‐Jiang Wang
- Engineering Research Center of Organosilicon Compounds & Materials, Ministry of Education, College of Chemistry and Molecular Sciences, Wuhan University Wuhan Hubei 430072 China
- State Key Laboratory of Elemento‐organic Chemistry, Nankai University Tianjin 300071 China
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4
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Chen Z, Zhang Q, Shan J, Lu Y, Liu Q. Detection of Bitter Taste Molecules Based on Odorant-Binding Protein-Modified Screen-Printed Electrodes. ACS OMEGA 2020; 5:27536-27545. [PMID: 33134717 PMCID: PMC7594143 DOI: 10.1021/acsomega.0c04089] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/24/2020] [Accepted: 09/29/2020] [Indexed: 05/08/2023]
Abstract
Bitter taste substances commonly represent a signal of toxicity. Fast and reliable detection of bitter molecules improves the safety of foods and beverages. Here, we report a biosensor using an easily accessible and cost-effective odorant-binding protein (OBP) of Drosophila melanogaster as a biosensitive material for the detection of bitter molecules. Based on the theoretical evaluation of the protein-ligand interaction, binding energies between the OBP and bitter molecules were calculated via molecular docking for the prediction and verification of binding affinities. Through one-step reduction, gold nanoparticles (AuNPs) and reduced graphene oxide (rGO) were deposited on the screen-printed electrodes for improving the electrochemical properties of electrodes. After the electrodes were immobilized with OBPs via layer-by-layer self-assembly, typical bitter molecules, such as denatonium, quinine, and berberine, were investigated through electrochemical impedance spectroscopy. The bitter molecules showed significant binding properties to the OBP with linear response concentrations ranging from 10-9 to 10-6 mg/mL. Therefore, the OBP-based biosensor offered powerful analytic techniques for the detection of bitter molecules and showed promising applications in the field of bitter taste evaluation.
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Affiliation(s)
- Zetao Chen
- Biosensor
National Special Laboratory, Key Laboratory for Biomedical Engineering
of Education Ministry, Department of Biomedical Engineering, Zhejiang University, Hangzhou 310027, P. R. China
| | - Qingqing Zhang
- Biosensor
National Special Laboratory, Key Laboratory for Biomedical Engineering
of Education Ministry, Department of Biomedical Engineering, Zhejiang University, Hangzhou 310027, P. R. China
| | - Jianzhen Shan
- The
First Affiliated Hospital of Zhejiang University School of Medicine, Hangzhou 310003, P. R. China
| | - Yanli Lu
- Biosensor
National Special Laboratory, Key Laboratory for Biomedical Engineering
of Education Ministry, Department of Biomedical Engineering, Zhejiang University, Hangzhou 310027, P. R. China
- Collaborative
Innovation Center of TCM Health Management, Fujian University of Traditional Chinese Medicine, Fuzhou 350108, P. R. China
- . Tel/Fax: +86 571 87953796
| | - Qingjun Liu
- Biosensor
National Special Laboratory, Key Laboratory for Biomedical Engineering
of Education Ministry, Department of Biomedical Engineering, Zhejiang University, Hangzhou 310027, P. R. China
- Collaborative
Innovation Center of TCM Health Management, Fujian University of Traditional Chinese Medicine, Fuzhou 350108, P. R. China
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5
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Choules MP, Bisson J, Gao W, Lankin DC, McAlpine JB, Niemitz M, Jaki BU, Franzblau SG, Pauli GF. Quality Control of Therapeutic Peptides by 1H NMR HiFSA Sequencing. J Org Chem 2019; 84:3055-3073. [PMID: 30793905 DOI: 10.1021/acs.joc.8b02704] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
Ensuring identity, purity, and reproducibility are equally essential during synthetic chemistry, drug discovery, and for pharmaceutical product safety. Many peptidic APIs are large molecules that require considerable effort for integrity assurance. This study builds on quantum mechanical 1H iterative Full Spin Analysis (HiFSA) to establish NMR peptide sequencing methodology that overcomes the intrinsic limitations of principal compendial methods in identifying small structural changes or minor impurities that affect effectiveness and safety. HiFSA sequencing yields definitive identity and purity information concurrently, allowing for API quality assurance and control (QA/QC). Achieving full peptide analysis via NMR building blocks, the process lends itself to both research and commercial applications as 1D 1H NMR (HNMR) is the most sensitive and basic NMR experiment. The generated HiFSA profiles are independent of instrument or software tools and work at any magnetic field strength. Pairing with absolute or 100% qHNMR enables quantification of mixtures and/or determination of peptide conformer populations. Demonstration of the methodology uses single amino acids (AAs) and peptides of increasing size, including the octapeptide, angiotensin II, and the nonapeptide, oxytocin. The feasibility of HiFSA coupled with automated NMR and qHNMR for use in QC/QA efforts is established through case-based examples and recommended procedures.
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6
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Wei L, Zhu Q, Xu SM, Chang X, Wang CJ. Stereodivergent Synthesis of α,α-Disubstituted α-Amino Acids via Synergistic Cu/Ir Catalysis. J Am Chem Soc 2018; 140:1508-1513. [DOI: 10.1021/jacs.7b12174] [Citation(s) in RCA: 189] [Impact Index Per Article: 31.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Affiliation(s)
- Liang Wei
- College
of Chemistry and Molecular Sciences, Wuhan University, Wuhan 430072, China
| | - Qiao Zhu
- College
of Chemistry and Molecular Sciences, Wuhan University, Wuhan 430072, China
| | - Shi-Ming Xu
- College
of Chemistry and Molecular Sciences, Wuhan University, Wuhan 430072, China
| | - Xin Chang
- College
of Chemistry and Molecular Sciences, Wuhan University, Wuhan 430072, China
| | - Chun-Jiang Wang
- College
of Chemistry and Molecular Sciences, Wuhan University, Wuhan 430072, China
- State
Key Laboratory of Elemento-organic Chemistry, Nankai University, Tianjin 300071, China
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7
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Crisma M, Toniolo C. Helical screw-sense preferences of peptides based on chiral, Cα-tetrasubstituted α-amino acids. Biopolymers 2016; 104:46-64. [PMID: 25363510 DOI: 10.1002/bip.22581] [Citation(s) in RCA: 68] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/24/2014] [Revised: 10/14/2014] [Accepted: 10/24/2014] [Indexed: 01/09/2023]
Abstract
The preferred helical screw senses of chiral α-amino acids with a C(α)-tetrasubstituted α-carbon atom, as determined in the crystal state by X-ray diffraction analyses on derivatives and peptides, are reviewed. This survey covers C(α)-methylated and C(α)-ethylated α-amino acids, as well as α-amino acids cyclized on the α-carbon, including those characterized by the combination of lack of chirality at the α-carbon with either side-chain or axial chirality. Although, in general, chiral C(α)-tetrasubstituted α-amino acids show a less pronounced bias toward a single helical screw sense than their proteinogenic (C(α)-trisubstituted) counterparts, our analysis highlights significant differences in terms of magnitude and direction of such a bias among the various sub-families of residues, and between individual amino acids within each sub-family as well. The experimental findings can be rationalized, at least in part, on the basis of steric considerations.
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Affiliation(s)
- Marco Crisma
- Institute of Biomolecular Chemistry, Padova Unit, CNR, 35131, Padova, Italy
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8
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O'Connor M, Sun C, Lee D. Synthesis of Amathaspiramides by Aminocyanation of Enoates. Angew Chem Int Ed Engl 2015; 54:9963-6. [DOI: 10.1002/anie.201503982] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/30/2015] [Indexed: 11/10/2022]
Affiliation(s)
- Matthew O'Connor
- Department of Chemistry, University of Illinois at Chicago, 845 West Taylor Street, Chicago, IL (USA)
| | - Chunrui Sun
- Merck Discovery Chemistry, 2000 Galloping Hill Road, Kenilworth, NJ 07033 (USA)
| | - Daesung Lee
- Department of Chemistry, University of Illinois at Chicago, 845 West Taylor Street, Chicago, IL (USA)
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9
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O'Connor M, Sun C, Lee D. Synthesis of Amathaspiramides by Aminocyanation of Enoates. Angew Chem Int Ed Engl 2015. [DOI: 10.1002/ange.201503982] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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10
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Li K, Tan G, Huang J, Song F, You J. Iron-Catalyzed Oxidative CH/CH Cross-Coupling: An Efficient Route to α-Quaternary α-Amino Acid Derivatives. Angew Chem Int Ed Engl 2013; 52:12942-5. [DOI: 10.1002/anie.201306181] [Citation(s) in RCA: 104] [Impact Index Per Article: 9.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/16/2013] [Indexed: 11/11/2022]
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11
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Li K, Tan G, Huang J, Song F, You J. Iron-Catalyzed Oxidative CH/CH Cross-Coupling: An Efficient Route to α-Quaternary α-Amino Acid Derivatives. Angew Chem Int Ed Engl 2013. [DOI: 10.1002/ange.201306181] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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12
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Dörrich S, Falgner S, Schweeberg S, Burschka C, Brodin P, Wissing BM, Basta B, Schell P, Bauer U, Tacke R. Silicon-Containing Dipeptidic Aspartame and Neotame Analogues. Organometallics 2012. [DOI: 10.1021/om300442e] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Steffen Dörrich
- Institut für Anorganische Chemie, Universität Würzburg,
Am Hubland, D-97074 Würzburg, Germany
| | - Steffen Falgner
- Institut für Anorganische Chemie, Universität Würzburg,
Am Hubland, D-97074 Würzburg, Germany
| | - Sarah Schweeberg
- Institut für Anorganische Chemie, Universität Würzburg,
Am Hubland, D-97074 Würzburg, Germany
| | - Christian Burschka
- Institut für Anorganische Chemie, Universität Würzburg,
Am Hubland, D-97074 Würzburg, Germany
| | - Peter Brodin
- AstraZeneca, R&D Mölndal, Pepparedsleden 1, S-43183 Mölndal, Sweden
| | | | - Babro Basta
- AstraZeneca, R&D Mölndal, Pepparedsleden 1, S-43183 Mölndal, Sweden
| | - Peter Schell
- AstraZeneca, R&D Mölndal, Pepparedsleden 1, S-43183 Mölndal, Sweden
| | - Udo Bauer
- AstraZeneca, R&D Mölndal, Pepparedsleden 1, S-43183 Mölndal, Sweden
| | - Reinhold Tacke
- Institut für Anorganische Chemie, Universität Würzburg,
Am Hubland, D-97074 Würzburg, Germany
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13
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Kim MR, Yukio K, Kim KM, Lee CH. Tastes and structures of bitter peptide, asparagine-alanine-leucine-proline-glutamate, and its synthetic analogues. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2008; 56:5852-5858. [PMID: 18576657 DOI: 10.1021/jf7036664] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/26/2023]
Abstract
Asn-Ala-Leu-Pro-Glu (NALPE) is a strong bitter peptide with a minimum response threshold (MRT) of 0.074 mM. To elucidate the relationship of spatial structure and bitterness on peptides, NALPE and its analogues, NALPW, NALPS, NALPL, NALPP, NALPD, and NALPR, were synthesized and sensorially evaluated. Structural analysis using computer simulation for each peptide revealed that the presence of a polar group and hydrophobic bitter amino acids, the composition of hydrophobic regions, the spatial orientation of the polar group and hydrophobic regions, and the proximity between polar groups and hydrophobic regions faced within the same plane space may be the major determinants for the taste type and intensity of peptide bitterness.
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Affiliation(s)
- Mi-Ryung Kim
- School of Life Science and Biotechnology, Korea University, Seoul 136-701, Korea [corrected]
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14
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Tanaka K, Takahashi M, Imase H, Osaka T, Noguchi K, Hirano M. Enantioselective synthesis of α,α-disubstituted α-amino acids by Rh-catalyzed [2+2+2] cycloaddition of 1,6-diynes with protected dehydroamino acid. Tetrahedron 2008. [DOI: 10.1016/j.tet.2008.04.107] [Citation(s) in RCA: 30] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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15
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Jew SS, Jeong BS, Lee JH, Yoo MS, Lee YJ, Park BS, Kim MG, Park HG. Highly enantioselective synthesis of alpha-alkyl-alanines via the catalytic phase-transfer alkylation of 2-naphthyl aldimine tert-butyl ester by using O(9)-allyl-N(1)-2',3',4'-trifluorobenzylhydrocinchonidinium bromide. J Org Chem 2003; 68:4514-6. [PMID: 12762758 DOI: 10.1021/jo034006t] [Citation(s) in RCA: 62] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Systematic investigations to develop an efficient enantioselective synthetic method for alpha-alkyl-alanine by catalytic phase-transfer alkylation were performed. The alkylation of 2-naphthyl aldimine tert-butyl ester, 1E, with RbOH and O(9)-allyl-N-2',3',4'-trifluorobenzylhydrocinchonidinium bromide, 6, at -35 degrees C showed the highest enantioselectivities, up to 96% ee.
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Affiliation(s)
- Sang-sup Jew
- Research Institute of Pharmaceutical Science and College of Pharmacy, Seoul National University, Korea.
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16
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Toniolo C, Crisma M, Formaggio F, Peggion C. Control of peptide conformation by the Thorpe-Ingold effect (C alpha-tetrasubstitution). Biopolymers 2002; 60:396-419. [PMID: 12209474 DOI: 10.1002/1097-0282(2001)60:6<396::aid-bip10184>3.0.co;2-7] [Citation(s) in RCA: 576] [Impact Index Per Article: 26.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
The preferred conformations of peptides heavily based on the currently extensively exploited achiral and chiral alpha-amino acids with a quaternary alpha-carbon atom, as determined by conformational energy computations, crystal-state (x-ray diffraction) analyses, and solution ((1)H-NMR and spectroscopic) investigations, are reviewed. It is concluded that 3(10)/alpha-helical structures and the fully extended (C(5)) conformation are preferentially adopted by peptide sequences characterized by this family of amino acids, depending upon overall bulkiness and nature (e.g., whether acyclic or C(alpha) (i) <--> C(alpha) (i) cyclized) of their side chains. The intriguing relationship between alpha-carbon chirality and bend/helix handedness is also illustrated. gamma-Bends and semiextended conformations are rarely observed. Formation of beta-sheet structures is prevented.
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Affiliation(s)
- C Toniolo
- Department of Organic Chemistry, University of Padova, Institute of Biomolecular Chemistry, CNR, 35131 Padova, Italy.
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17
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Royo S, López P, Jiménez AI, Oliveros L, Cativiela C. First synthesis of the two enantiomers of alpha-methyldiphenylalanine [(alphaMe)Dip] by HPLC resolution. Chirality 2002; 14:39-46. [PMID: 11748799 DOI: 10.1002/chir.10036] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
A strategy for the preparation of enantiomerically pure (R)- and (S)-alpha-methyldiphenylalanine, constrained phenylalanine analogs, is described. A racemic precursor was prepared in high yield from easily available starting products and subjected to HPLC resolution on a noncommercial chiral stationary phase. More than 600 mg of each enantiomer was isolated in optically pure form by using a 150 x 20 mm ID column containing mixed 10-undecenoate/3,5-dimethylphenylcarbamate of cellulose covalently bonded to allylsilica gel and a mixture of n-hexane/2-propanol/acetone as the mobile phase.
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Affiliation(s)
- Soledad Royo
- Departamento de Química Orgánica, ICMA, Universidad de Zaragoza-CSIC, 50009 Zaragoza, Spain
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18
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Maruoka K. Design of new, chiral phase-transfer catalysts for practical, catalytic asymmetric synthesis. J Fluor Chem 2001. [DOI: 10.1016/s0022-1139(01)00472-9] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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19
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Garbow JR, Likos JJ, Schroeder SA. Structure, dynamics, and stability of beta-cyclodextrin inclusion complexes of aspartame and neotame. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2001; 49:2053-2060. [PMID: 11308366 DOI: 10.1021/jf001122d] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
Abstract
Studies of the high-intensity sweetener aspartame show that its stability is significantly enhanced in the presence of beta-cyclodextrin (beta-CyD). At a 5:1 beta-CyD/aspartame molar ratio, the stability of aspartame is 42% greater in 4 mM phosphate buffer (pH 3.1) compared to solutions prepared without beta-CyD. Solution-state (1)H NMR experiments demonstrate the formation of 1:1 beta-CyD/aspartame complexes, stabilized by the interaction of the phenyl-ring protons of aspartame with the H3 and H5 protons of beta-CyD. Inclusion complex formation clearly accounts for the observed stability enhancement of aspartame in solution. The formation of inclusion complexes in solution is also demonstrated for beta-CyD and neotame, a structural derivative of aspartame containing an N-substituted 3,3-dimethylbutyl group. These complexes are stabilized by the interaction of beta-CyD with both phenyl-ring and dimethylbutyl protons. Solid-state NMR experiments provide additional characterization, clearly demonstrating the formation of inclusion complexes in lyophilized solids prepared from solutions of beta-CyD and either aspartame or neotame.
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Affiliation(s)
- J R Garbow
- Analytical Sciences Center, Pharmacia Corporation, 800 North Lindbergh Boulevard, St. Louis, Missouri 63167, USA.
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21
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Jiménez AI, Cativiela C, Gómez-Catalán J, Pérez JJ, Aubry A, París M, Marraud M. Influence of Side Chain Restriction and NH···π Interaction on the β-Turn Folding Modes of Dipeptides Incorporating Phenylalanine Cyclohexane Derivatives. J Am Chem Soc 2000. [DOI: 10.1021/ja993568k] [Citation(s) in RCA: 55] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Ana I. Jiménez
- Contribution from the Department of Organic Chemistry, ICMA, CSIC−University of Zaragoza, 50009 Zaragoza, Spain, Department of Chemical Engineering, Technical University of Catalonia, 08028 Barcelona, Spain, Laboratory of Crystallography and Modeling of Mineral and Biological Materials, ESA-7036, University Henri Poincaré of Nancy, BP 236, 54509 Vandoeuvre, France, and Laboratory of Macromolecular Physical Chemistry, UMR-7568 CNRS-INPL, ENSIC, BP 451, 54001 Nancy, France
| | - Carlos Cativiela
- Contribution from the Department of Organic Chemistry, ICMA, CSIC−University of Zaragoza, 50009 Zaragoza, Spain, Department of Chemical Engineering, Technical University of Catalonia, 08028 Barcelona, Spain, Laboratory of Crystallography and Modeling of Mineral and Biological Materials, ESA-7036, University Henri Poincaré of Nancy, BP 236, 54509 Vandoeuvre, France, and Laboratory of Macromolecular Physical Chemistry, UMR-7568 CNRS-INPL, ENSIC, BP 451, 54001 Nancy, France
| | - Jesús Gómez-Catalán
- Contribution from the Department of Organic Chemistry, ICMA, CSIC−University of Zaragoza, 50009 Zaragoza, Spain, Department of Chemical Engineering, Technical University of Catalonia, 08028 Barcelona, Spain, Laboratory of Crystallography and Modeling of Mineral and Biological Materials, ESA-7036, University Henri Poincaré of Nancy, BP 236, 54509 Vandoeuvre, France, and Laboratory of Macromolecular Physical Chemistry, UMR-7568 CNRS-INPL, ENSIC, BP 451, 54001 Nancy, France
| | - Juan J. Pérez
- Contribution from the Department of Organic Chemistry, ICMA, CSIC−University of Zaragoza, 50009 Zaragoza, Spain, Department of Chemical Engineering, Technical University of Catalonia, 08028 Barcelona, Spain, Laboratory of Crystallography and Modeling of Mineral and Biological Materials, ESA-7036, University Henri Poincaré of Nancy, BP 236, 54509 Vandoeuvre, France, and Laboratory of Macromolecular Physical Chemistry, UMR-7568 CNRS-INPL, ENSIC, BP 451, 54001 Nancy, France
| | - André Aubry
- Contribution from the Department of Organic Chemistry, ICMA, CSIC−University of Zaragoza, 50009 Zaragoza, Spain, Department of Chemical Engineering, Technical University of Catalonia, 08028 Barcelona, Spain, Laboratory of Crystallography and Modeling of Mineral and Biological Materials, ESA-7036, University Henri Poincaré of Nancy, BP 236, 54509 Vandoeuvre, France, and Laboratory of Macromolecular Physical Chemistry, UMR-7568 CNRS-INPL, ENSIC, BP 451, 54001 Nancy, France
| | - Miguel París
- Contribution from the Department of Organic Chemistry, ICMA, CSIC−University of Zaragoza, 50009 Zaragoza, Spain, Department of Chemical Engineering, Technical University of Catalonia, 08028 Barcelona, Spain, Laboratory of Crystallography and Modeling of Mineral and Biological Materials, ESA-7036, University Henri Poincaré of Nancy, BP 236, 54509 Vandoeuvre, France, and Laboratory of Macromolecular Physical Chemistry, UMR-7568 CNRS-INPL, ENSIC, BP 451, 54001 Nancy, France
| | - Michel Marraud
- Contribution from the Department of Organic Chemistry, ICMA, CSIC−University of Zaragoza, 50009 Zaragoza, Spain, Department of Chemical Engineering, Technical University of Catalonia, 08028 Barcelona, Spain, Laboratory of Crystallography and Modeling of Mineral and Biological Materials, ESA-7036, University Henri Poincaré of Nancy, BP 236, 54509 Vandoeuvre, France, and Laboratory of Macromolecular Physical Chemistry, UMR-7568 CNRS-INPL, ENSIC, BP 451, 54001 Nancy, France
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22
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Ooi T, Takeuchi M, Kameda M, Maruoka K. Practical Catalytic Enantioselective Synthesis of α,α-Dialkyl-α-amino Acids by Chiral Phase-Transfer Catalysis. J Am Chem Soc 2000. [DOI: 10.1021/ja0007051] [Citation(s) in RCA: 276] [Impact Index Per Article: 11.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Takashi Ooi
- Department of Chemistry, Graduate School of Science Hokkaido University, Sapporo 060-0810, Japan Department of Chemistry, Graduate School of Science Kyoto University, Sakyo, Kyoto 606-8502, Japan
| | - Mifune Takeuchi
- Department of Chemistry, Graduate School of Science Hokkaido University, Sapporo 060-0810, Japan Department of Chemistry, Graduate School of Science Kyoto University, Sakyo, Kyoto 606-8502, Japan
| | - Minoru Kameda
- Department of Chemistry, Graduate School of Science Hokkaido University, Sapporo 060-0810, Japan Department of Chemistry, Graduate School of Science Kyoto University, Sakyo, Kyoto 606-8502, Japan
| | - Keiji Maruoka
- Department of Chemistry, Graduate School of Science Hokkaido University, Sapporo 060-0810, Japan Department of Chemistry, Graduate School of Science Kyoto University, Sakyo, Kyoto 606-8502, Japan
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Ming D, Ninomiya Y, Margolskee RF. Blocking taste receptor activation of gustducin inhibits gustatory responses to bitter compounds. Proc Natl Acad Sci U S A 1999; 96:9903-8. [PMID: 10449792 PMCID: PMC22308 DOI: 10.1073/pnas.96.17.9903] [Citation(s) in RCA: 53] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
Gustducin, a transducin-like guanine nucleotide-binding regulatory protein (G protein), and transducin are expressed in taste receptor cells where they are thought to mediate taste transduction. Gustducin and transducin are activated in the presence of bovine taste membranes by several compounds that humans perceive to be bitter. We have monitored this activation with an in vitro assay to identify compounds that inhibited taste receptor activation of transducin by bitter tastants: AMP and chemically related compounds inhibited in vitro responses to several bitter compounds (e.g., denatonium, quinine, strychnine, and atropine). AMP also inhibited behavioral and electrophysiological responses of mice to bitter tastants, but not to NaCl, HCl, or sucrose. GMP, although chemically similar to AMP, inhibited neither the bitter-responsive taste receptor activation of transducin nor the gustatory responses of mice to bitter compounds. AMP and certain related compounds may bind to bitter-responsive taste receptors or interfere with receptor-G protein coupling to serve as naturally occurring taste modifiers.
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Affiliation(s)
- D Ming
- Department of Physiology and Biophysics, The Mount Sinai School of Medicine, Box 1677, One Gustave L. Levy Place, New York, NY 10029, USA
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Mossel E, Formaggio F, Crisma M, Toniolo C, Broxterman QB, Boesten WH, Kamphuis J, Quaedflieg PJ, Temussi P. Aspartame dipeptide analogues: effect of number of side-chain methylene group spacers and Cα-methylation in the second position. ACTA ACUST UNITED AC 1997. [DOI: 10.1016/s0957-4166(97)00127-4] [Citation(s) in RCA: 35] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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