1
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Duan HX, Li HN, Yang Y, Wu XJ, Wang YQ. Catalytic asymmetric synthesis of carboranylated diols bearing two adjacent stereocenters located at the α,β-position of o-carborane cage carbon. Dalton Trans 2023; 52:4077-4085. [PMID: 36880957 DOI: 10.1039/d3dt00129f] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/16/2023]
Abstract
Despite the great interest in carborane-containing molecules, there is a lack of literature on the generation of central chiralities, via catalytic asymmetric transformations using prochiral carboranyl substrates. Herein, we have synthesized novel optically active icosahedral carborane-containing diols via Sharpless catalytic asymmetric dihydroxylation of carborane-derived alkenes, under mild conditions. The reaction showed a good substrate scope with 74-94% yields and 92->99% ee. This synthetic approach facilitated the creation of two adjacent stereocenters respectively located at the α,β-position of o-carborane cage carbon, with a single syn-diastereoisomer. In addition, the obtained chiral carborane-containing diol product can be transformed to cyclic sulfate and can subsequently undergo a nucleophilic substitution and reduction to obtain the unexpected nido-carboranyl derivatives of chiral amino alcohols in the form of zwitterions.
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Affiliation(s)
- Hui-Xin Duan
- Provincial Key Laboratory of Natural Medicine and Immuno-Engineering, Henan University, Kaifeng, Henan, 475004, People's Republic of China.
| | - Hao-Nan Li
- Provincial Key Laboratory of Natural Medicine and Immuno-Engineering, Henan University, Kaifeng, Henan, 475004, People's Republic of China.
| | - Yong Yang
- Zhengzhou Yuanli Biological Technology Co., Ltd., Zhengzhou, Henan, 450001, People's Republic of China
| | - Xiao-Jun Wu
- Zhengzhou Yuanli Biological Technology Co., Ltd., Zhengzhou, Henan, 450001, People's Republic of China
| | - You-Qing Wang
- Provincial Key Laboratory of Natural Medicine and Immuno-Engineering, Henan University, Kaifeng, Henan, 475004, People's Republic of China. .,Zhengzhou Yuanli Biological Technology Co., Ltd., Zhengzhou, Henan, 450001, People's Republic of China
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2
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Yuen TY, Brown CJ, Tan YS, Johannes CW. Synthesis of Chiral Alkenyl Cyclopropane Amino Acids for Incorporation into Stapled Peptides. J Org Chem 2019; 85:1556-1566. [DOI: 10.1021/acs.joc.9b02659] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
Affiliation(s)
- Tsz Ying Yuen
- Institute of Chemical and Engineering Sciences, Agency for Science, Technology and Research, 8 Biomedical Grove, #07-01, Neuros, Singapore 138665
| | - Christopher J. Brown
- P53 Laboratory, Agency for Science, Technology and Research, 8A Biomedical Grove, #06-06, Immunos, Singapore 138648
| | - Yaw Sing Tan
- Bioinformatics Institute, Agency for Science, Technology and Research, 30 Biopolis Street, #07-01, Matrix, Singapore 138671
| | - Charles W. Johannes
- P53 Laboratory, Agency for Science, Technology and Research, 8A Biomedical Grove, #06-06, Immunos, Singapore 138648
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3
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Ricci L, Sernissi L, Scarpi D, Bianchini F, Contini A, Occhiato EG. Synthesis and conformational analysis of peptides embodying 2,3-methanopipecolic acids. Org Biomol Chem 2017; 15:6826-6836. [DOI: 10.1039/c7ob01617d] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
Abstract
When 2,3-methanopipecolic acids replace a proline in peptides, a marked preference (42–92%) for thecisgeometry around the pipecolic amide bond is observed in both water and organic solvents.
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Affiliation(s)
- Luciano Ricci
- Department of Chemistry “U. Schiff”
- University of Florence
- Sesto Fiorentino
- Italy
| | - Lorenzo Sernissi
- Department of Chemistry “U. Schiff”
- University of Florence
- Sesto Fiorentino
- Italy
| | - Dina Scarpi
- Department of Chemistry “U. Schiff”
- University of Florence
- Sesto Fiorentino
- Italy
| | - Francesca Bianchini
- Department of Biomedical
- Experimental and Clinical Sciences “Mario Serio”
- University of Florence
- Florence
- Italy
| | - Alessandro Contini
- Department of Pharmaceutical Sciences
- University of Milan
- I-20133 Milan
- Italy
| | - Ernesto G. Occhiato
- Department of Chemistry “U. Schiff”
- University of Florence
- Sesto Fiorentino
- Italy
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4
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Mori Y, Okumura H. Molecular dynamics of the structural changes of helical peptides induced by pressure. Proteins 2014; 82:2970-81. [DOI: 10.1002/prot.24654] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/19/2014] [Revised: 06/24/2014] [Accepted: 07/15/2014] [Indexed: 11/05/2022]
Affiliation(s)
- Yoshiharu Mori
- Department of Theoretical and Computational Molecular Science; Institute for Molecular Science; Okazaki Aichi 444-8585 Japan
| | - Hisashi Okumura
- Department of Theoretical and Computational Molecular Science; Institute for Molecular Science; Okazaki Aichi 444-8585 Japan
- Research Center for Computational Science; Institute for Molecular Science; Okazaki Aichi 444-8585 Japan
- Department of Structural Molecular Science; The Graduate University for Advanced Studies; Okazaki Aichi 444-8585 Japan
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5
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Sernissi L, Petrović M, Scarpi D, Guarna A, Trabocchi A, Bianchini F, Occhiato EG. Cyclopropane Pipecolic Acids as Templates for Linear and Cyclic Peptidomimetics: Application in the Synthesis of an Arg-Gly-Asp (RGD)-Containing Peptide as an αvβ3Integrin Ligand. Chemistry 2014; 20:11187-203. [DOI: 10.1002/chem.201403077] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/14/2014] [Indexed: 12/26/2022]
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6
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Milanole G, Couve-Bonnaire S, Bonfanti JF, Jubault P, Pannecoucke X. Synthesis of Fluorinated Cyclopropyl Amino Acid Analogues: Toward the Synthesis of Original Fluorinated Peptidomimetics. J Org Chem 2012; 78:212-23. [DOI: 10.1021/jo302222n] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Affiliation(s)
- Gaëlle Milanole
- INSA de Rouen, UMR 6014 & FR 3038, COBRA Université de Rouen, 1 rue Tesnière, 76131 Mont-Saint-Aignan Cedex, France
| | - Samuel Couve-Bonnaire
- INSA de Rouen, UMR 6014 & FR 3038, COBRA Université de Rouen, 1 rue Tesnière, 76131 Mont-Saint-Aignan Cedex, France
| | - Jean-François Bonfanti
- Janssen Research & Development, Medicinal Chemistry Infectious Diseases, Centre de Recherche Janssen Cilag, Campus de Maigremont, BP 615, 27106 Val de Reuil Cedex, France
| | - Philippe Jubault
- INSA de Rouen, UMR 6014 & FR 3038, COBRA Université de Rouen, 1 rue Tesnière, 76131 Mont-Saint-Aignan Cedex, France
| | - Xavier Pannecoucke
- INSA de Rouen, UMR 6014 & FR 3038, COBRA Université de Rouen, 1 rue Tesnière, 76131 Mont-Saint-Aignan Cedex, France
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7
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8
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Jiménez AI, Vaquero V, Cabezas C, López JC, Cativiela C, Alonso JL. The Singular Gas-Phase Structure of 1-Aminocyclopropanecarboxylic Acid (Ac3c). J Am Chem Soc 2011; 133:10621-8. [DOI: 10.1021/ja2033603] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Ana I. Jiménez
- Departamento de Química
Orgánica, ISQCH, Universidad de Zaragoza−CSIC, 50009 Zaragoza, Spain
| | - Vanesa Vaquero
- Grupo de Espectroscopía
Molecular (GEM), Edificio Quifima, Laboratorios de Espectroscopia
y Bioespectroscopia, Parque Científico Uva, Universidad de Valladolid, 45005 Valladolid, Spain
| | - Carlos Cabezas
- Grupo de Espectroscopía
Molecular (GEM), Edificio Quifima, Laboratorios de Espectroscopia
y Bioespectroscopia, Parque Científico Uva, Universidad de Valladolid, 45005 Valladolid, Spain
| | - Juan C. López
- Grupo de Espectroscopía
Molecular (GEM), Edificio Quifima, Laboratorios de Espectroscopia
y Bioespectroscopia, Parque Científico Uva, Universidad de Valladolid, 45005 Valladolid, Spain
| | - Carlos Cativiela
- Departamento de Química
Orgánica, ISQCH, Universidad de Zaragoza−CSIC, 50009 Zaragoza, Spain
| | - José L. Alonso
- Grupo de Espectroscopía
Molecular (GEM), Edificio Quifima, Laboratorios de Espectroscopia
y Bioespectroscopia, Parque Científico Uva, Universidad de Valladolid, 45005 Valladolid, Spain
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9
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Engle KM, Wang DH, Yu JQ. Ligand-accelerated C-H activation reactions: evidence for a switch of mechanism. J Am Chem Soc 2010; 132:14137-51. [PMID: 20853838 PMCID: PMC2952432 DOI: 10.1021/ja105044s] [Citation(s) in RCA: 388] [Impact Index Per Article: 27.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
Initial rate studies have revealed dramatic acceleration in aerobic Pd(II)-catalyzed C-H olefination reactions of phenylacetic acids when mono-N-protected amino acids are used as ligands. In light of these findings, systematic ligand tuning was undertaken, which has resulted in drastic improvements in substrate scope, reaction rate, and catalyst turnover. We present evidence from intermolecular competition studies and kinetic isotope effect experiments that implies that the observed rate increases are a result of acceleration in the C-H cleavage step. Furthermore, these studies suggest that the origin of this phenomenon is a change in the mechanism of C-H cleavage from electrophilic palladation to proton abstraction.
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Affiliation(s)
- Keary M. Engle
- Department of Chemistry, The Scripps Research Institute, 10550 N. Torrey Pines Rd., La Jolla, California 92037
| | - Dong-Hui Wang
- Department of Chemistry, The Scripps Research Institute, 10550 N. Torrey Pines Rd., La Jolla, California 92037
| | - Jin-Quan Yu
- Department of Chemistry, The Scripps Research Institute, 10550 N. Torrey Pines Rd., La Jolla, California 92037
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10
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trans-(2R,3R)-2,3-Diphenylcyclopropane-1,1-dimethanol: a pivotal diol for the synthesis of novel C2-symmetric ligands for asymmetric transition metal catalysis. ACTA ACUST UNITED AC 2010. [DOI: 10.1016/j.tetasy.2010.08.007] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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11
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Gök Y, Noël T, Van der Eycken J. Novel C2-symmetric bisoxazolines with a chiral trans-(2R,3R)-diphenylcyclopropane backbone: preparation and application in several enantioselective catalytic reactions. ACTA ACUST UNITED AC 2010. [DOI: 10.1016/j.tetasy.2010.07.021] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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12
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Grauer AA, Cabrele C, Zabel M, König B. Stable right- and left-handed peptide helices containing C(alpha)-tetrasubstituted alpha-amino acids. J Org Chem 2009; 74:3718-26. [PMID: 19354242 DOI: 10.1021/jo900222g] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Short peptidomimetics with stable secondary structures in solution are of interest for applications in chemistry, biology, and medicine. One way to rigidify the backbone of a peptide is the use of cyclic C(alpha)-tetrasubstituted alpha-amino acids (TAAs) like compound 14. The structures resulting from the incorporation of this unnatural amino acid into peptides were investigated. In total, 13 different peptides with a length of up to eight residues and alternating sequences of TAA 14 and (S)- or (R)-valine were synthesized. Their structures were characterized by X-ray diffraction analysis and NMR and CD measurements showing that the all-S-backbone-configured peptides 5 and 6 (SS)(2-3) form right-handed 3(10)-helices, while the all-R-configured peptides 11-13 (RR)(2-4) form left-handed 3(10)-helices in the solid state and solution.
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Affiliation(s)
- Andreas A Grauer
- Institute for Organic Chemistry, University of Regensburg, D-93040 Regensburg, Germany
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13
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Fan R, Ye Y, Li W, Wang L. Efficient Stereoselective Synthesis of Nitrocyclopropanes by the Oxidative Cyclization of Michael Adducts of Nitroolefins with Activated Methylene Compounds. Adv Synth Catal 2008. [DOI: 10.1002/adsc.200800452] [Citation(s) in RCA: 53] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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14
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Maity P, König B. Enantio- and diastereoselective syntheses of cyclic Cα-tetrasubstituted α-amino acids and their use to induce stable conformations in short peptides. Biopolymers 2007; 90:8-27. [DOI: 10.1002/bip.20902] [Citation(s) in RCA: 65] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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15
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Brackmann F, de Meijere A. Natural Occurrence, Syntheses, and Applications of Cyclopropyl-Group-Containing α-Amino Acids. 1. 1-Aminocyclopropanecarboxylic Acid and Other 2,3-Methanoamino Acids. Chem Rev 2007; 107:4493-537. [DOI: 10.1021/cr078376j] [Citation(s) in RCA: 208] [Impact Index Per Article: 12.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Farina Brackmann
- Institut für Organische und Biomolekulare Chemie der Georg-August-Universität Göttingen, Tammannstrasse 2, 37077 Göttingen, Germany
| | - Armin de Meijere
- Institut für Organische und Biomolekulare Chemie der Georg-August-Universität Göttingen, Tammannstrasse 2, 37077 Göttingen, Germany
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16
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Casanovas J, Jiménez AI, Cativiela C, Pérez JJ, Aleman C. Conformational analysis of a cyclopropane analogue of phenylalanine with two geminal phenyl substituents. J Phys Chem B 2007; 110:5762-6. [PMID: 16539522 DOI: 10.1021/jp0542569] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Quantum mechanical methods have been used to investigate the intrinsic conformational preferences of 1-amino-2,2-diphenylcyclopropanecarboxylic acid (c(3)Dip), a cyclopropane analogue of phenylalanine bearing two phenyl substituents on the same beta-carbon. Geometries, energies, and frequencies were calculated on the N-acetyl-N'-methylamide derivative at the HF and B3LYP levels using the 6-31G(d), 6-311G(d), and 6-31+G(d,p) basis sets. Four minimum energy conformations were characterized: axial C(7), equatorial C(7), right-handed helix, and polyproline II. Analysis of the whole results, which are fully consistent with available experimental data, indicates that c(3)Dip tends to promote gamma-turn conformations.
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Affiliation(s)
- Jordi Casanovas
- Departament de Química, Escola Politècnica Superior, Universitat de Lleida, c/Jaume II N 69, 25001 Lleida, Spain.
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17
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Crisma M, De Borggraeve WM, Peggion C, Formaggio F, Royo S, Jiménez AI, Cativiela C, Toniolo C. Preferred 3D-structure of peptides rich in a severely conformationally restricted cyclopropane analogue of phenylalanine. Chemistry 2007; 12:251-60. [PMID: 16281320 DOI: 10.1002/chem.200500865] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
Terminally blocked, homo-peptide amides of (R,R)-1-amino-2,3-diphenylcyclopropane-1-carboxylic acid (c3diPhe), a chiral member of the family of Calpha-tetrasubstituted alpha-amino acids, from the dimer to the tetramer, and diastereomeric co-oligopeptides of (R,R)- or (S,S)-c3diPhe with (S)-alanine residues to the trimer level were prepared in solution and fully characterized. The synthetic effort was extended to terminally protected co-oligopeptide esters to the hexamer, where c3diPhe residues are combined with achiral alpha-aminoisobutyric acid residues. The preferred conformations of the peptides were assessed in solution by FT-IR absorption, NMR, and CD techniques, and for seven oligomers in the crystal state (by X-ray diffraction) as well. This study clearly indicates that c3diPhe, a sterically demanding cyclopropane analogue of phenylalanine, tends to fold peptides into beta-turn and 3(10)-helix conformations. However, when c3diPhe is in combination with other chiral residues, the conformation preferred by the resulting peptides is also dictated by the chiral sequence of the amino acid building blocks. The (S,S)-enantiomer of this alpha-amino acid, unusually lacking asymmetry in the main chain, strongly favors the left-handedness of the turn/helical peptides formed.
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Affiliation(s)
- Marco Crisma
- Institute of Biomolecular Chemistry, CNR, Department of Chemistry, University of Padova via Marzolo 1, 35131 Padova, Italy
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18
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Roussel C, Vanthuyne N, Jobert JL, Loas AI, Tanase AE, Gherase D. HPLC on chiral support with polarimetric detection: Application to conglomerate discovery. Chirality 2007; 19:497-502. [PMID: 17437264 DOI: 10.1002/chir.20405] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Abstract
In conglomerates, each single crystal contains only one of the two possible enantiomeric forms--either dextrorotatory or levorotatory. The analysis of a single crystal by liquid chromatography on chiral support associated with chiroptical detection is a very efficient tool to reveal the occurrence of a conglomerate. In terms of rapidity and easiness, this method compares favorably with the classical methods used to show this occurrence. Two examples are provided.
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Affiliation(s)
- Christian Roussel
- UMR Chirotechnologies, Catalyse et Biocatalyse, Université Paul Cézanne, 13397 Marseille Cedex 20, France.
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19
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Abstract
[structure: see text] Cyclic semipeptoids 1 and 2 represent constrained, secondary structure mimics where the R(1) and R(2) side chains correspond to those of amino acids. Solid-phase syntheses and conformational analyses of these compounds are described.
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Affiliation(s)
- Ernest Nnanabu
- Texas A&M University, Chemistry Department, P.O. Box 30012, College Station, Texas 77842, USA
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20
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Alemán C, Zanuy D, Jiménez AI, Cativiela C, Haspel N, Zheng J, Casanovas J, Wolfson H, Nussinov R. Concepts and schemes for the re-engineering of physical protein modules: generating nanodevices via targeted replacements with constrained amino acids. Phys Biol 2006; 3:S54-62. [PMID: 16582465 DOI: 10.1088/1478-3975/3/1/s06] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Abstract
Physically building complex multi-molecular structures from naturally occurring biological macromolecules has aroused a great deal of interest. Here we focus on nanostructures composed of re-engineered, natural 'foldamer' building blocks. Our aim is to provide some of the underlying concepts and schemes for crafting structures utilizing such conformationally relatively stable molecular components. We describe how, via chemical biology strategies, it is further possible to chemically manipulate the foldamer building blocks toward specific shape-driven structures, which in turn could be used toward potential-designed functions. We outline the criteria in choosing candidate foldamers from the vast biological repertoire, and how to enhance their stability through selected targeted replacements by non-proteinogenic conformationally constrained amino acids. These approaches combine bioinformatics, high performance computations and mathematics with synthetic organic chemistry. The resulting artificially engineered self-organizing molecular scale structures take advantage of nature's nanobiology toolkit and at the same time improve on it, since their new targeted function differs from that optimized by evolution. The major challenge facing nanobiology is to be able to exercise fine control over the performance of these target-specific molecular machines.
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Affiliation(s)
- Carlos Alemán
- Departament d'Enginyeria Química, ETS d'Enginyeria Industrial de Barcelona, Universitat Politècnica de Catalunya, Diagonal 647, Barcelona E-08028, Spain.
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21
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Improved preparation of β-hydroxy-α-amino acids: direct formation of sulfates by sulfuryl chloride. ACTA ACUST UNITED AC 2005. [DOI: 10.1016/j.tetasy.2005.10.013] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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22
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Lin W, Charette A. Rhodium-Catalyzed Asymmetric Intramolecular Cyclopropanation of Substituted Allylic Cyanodiazoacetates. Adv Synth Catal 2005. [DOI: 10.1002/adsc.200505187] [Citation(s) in RCA: 50] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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23
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Royo S, De Borggraeve WM, Peggion C, Formaggio F, Crisma M, Jiménez AI, Cativiela C, Toniolo C. Turn and helical peptide handedness governed exclusively by side-chain chiral centers. J Am Chem Soc 2005; 127:2036-7. [PMID: 15713068 DOI: 10.1021/ja043116u] [Citation(s) in RCA: 56] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
We have examined the preferred 3D structure of homopeptides based on an alpha-amino acid lacking the asymmetry at the alpha-carbon but exhibiting chirality in the side chains (at the two beta-carbons). These joint stereochemical properties are remarkably unusual for an alpha-amino acid. To this end, we carried out an experimental investigation by X-ray diffraction and NMR spectrometry. The results point to a well-defined relationship between screw sense of the turn and helix structures formed and side-chain configurations.
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Affiliation(s)
- Soledad Royo
- Department of Organic Chemistry, ICMA, University of Zaragoza-CSIC, 50009 Zaragoza, Spain
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24
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Casanovas J, Jiménez AI, Cativiela C, Pérez JJ, Alemán C. N-acetyl-N'-methylamide derivative of (2S,3S)-1-amino-2,3-diphenylcyclopropanecarboxylic acid: theoretical analysis of the conformational impact produced by the incorporation of the second phenyl group to the cyclopropane analogue of phenylalanine. J Org Chem 2003; 68:7088-91. [PMID: 12946154 DOI: 10.1021/jo034720a] [Citation(s) in RCA: 28] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
The intrinsic conformational preferences of (2S,3S)-1-amino-2,3-diphenylcyclopropanecarboxylic acid, a phenylalanine cyclopropane analogue bearing two phenyl substituents, have been examined theoretically. For this purpose, its N-acetyl-N'-methylamide derivative, Ac-(2S,3S)c(3)diPhe-NHMe, has been investigated by using ab initio HF and DFT methods. Results have been compared with those previously reported for other cyclopropane analogues of phenylalanine, and with experimental data available for c(3)diPhe-containing peptides.
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Affiliation(s)
- Jordi Casanovas
- Departament de Química, Escola Universitària Politècnica, Universitat de Lleida, c/Jaume II No. 69, 25001 Lleida, Spain.
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25
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Buñuel E, Bull SD, Davies SG, Garner AC, Savory ED, Smith AD, Vickers RJ, Watkin DJ. Asymmetric synthesis of substituted 1-aminocyclopropane-1-carboxylic acids via diketopiperazine methodology. Org Biomol Chem 2003; 1:2531-42. [PMID: 12956073 DOI: 10.1039/b303348a] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Diketopiperazinespirocyclopropane 12 is prepared in > 98% d.e. via the conjugate addition of a phosphorus ylide to (6S)-N,N'-bis(p-methoxybenzyl)-3-methylenepiperazine-2,5-dione 2. Deprotection and hydrolysis of adduct 12 and subsequent peptide coupling demonstrate the applicability of this methodology to the asymmetric synthesis of 1-aminocyclopropane-1-carboxylic acids for incorporation into novel peptides. A model for the high level of diastereofacial selectivity observed in the cyclopropanation reaction is presented. A highly selective asymmetric approach (> 98% d.e.) to (S)-[2,2-(2)H2]-1-aminocyclopropane-1-carboxylic acid 29 is also reported via a deuterated sulfur ylide addition to acceptor 2.
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Affiliation(s)
- Elena Buñuel
- Dyson Perrins Laboratory, University of Oxford, South Parks Road, Oxford, UK OX1 3QY
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26
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Jiménez AI, Marraud M, Cativiela C. Cyclopropane analogue of valine: influence of side chain orientation on peptide folding. Tetrahedron Lett 2003. [DOI: 10.1016/s0040-4039(03)00514-8] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Lebel H, Marcoux JF, Molinaro C, Charette AB. Stereoselective cyclopropanation reactions. Chem Rev 2003; 103:977-1050. [PMID: 12683775 DOI: 10.1021/cr010007e] [Citation(s) in RCA: 1428] [Impact Index Per Article: 68.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Hélène Lebel
- Département de Chimie, Université de Montréal, Montréal, Québec, Canada H3C 3J7
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Su G, Mu H, Za D, Zeng L, Cativiela C, Hammer RP, Yu K. Stereospecific Synthesis oftrans-2,3-Diaryl Substituted 1-Aminocyclopropanecarboxylic Acid Derivatives. SYNTHETIC COMMUN 2003. [DOI: 10.1081/scc-120022177] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
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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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Jiménez AI, López P, Oliveros L, Cativiela C. Facile synthesis and highly efficient resolution of a constrained cyclopropane analogue of phenylalanine. Tetrahedron 2001. [DOI: 10.1016/s0040-4020(01)00530-0] [Citation(s) in RCA: 29] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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Jiménez AI, Cativiela C, Marraud M. A γ-turn induced by a highly constrained cyclopropane analogue of phenylalanine (c3diPhe) in the solid state. Tetrahedron Lett 2000. [DOI: 10.1016/s0040-4039(00)00841-8] [Citation(s) in RCA: 37] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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