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Mottalib MA, Haukka M, Nordlander E. Chiral diphosphine derivatives of alkylidyne tricobalt carbonyl clusters – A comparative study of different cobalt carbonyl (pre)catalysts for (asymmetric) intermolecular Pauson–Khand reactions. Polyhedron 2016. [DOI: 10.1016/j.poly.2015.04.021] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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Kendhale AM, Gonnade RG, Sanjayan GJ. Di- tert-butyl N, N′-(octahydropentalene-2,5-diyl)dicarbamate. Acta Crystallogr Sect E Struct Rep Online 2008; 64:o1149. [PMID: 21202657 PMCID: PMC2961559 DOI: 10.1107/s1600536808014876] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/08/2008] [Accepted: 05/16/2008] [Indexed: 11/28/2022]
Abstract
In the molecule of the title compound, C18H32N2O4, the central bicyclo[3.3.0]octane (octahydropentalene) has a rigid ring junction. Both rings of the bicyclo[3.3.0]octane unit adopt an envelope conformation, and the flexible tert-butylcarbamoyl side chains each have an extended conformation. Such a constrained bicyclo[3.3.0]octane aliphatic template is of interest with respect to the design of novel self-assembling motifs. Molecules related by c-glide symmetry are linked via intermolecular N—H⋯O hydrogen bonds, forming a two-dimensional layer structure. Neighboring layers are weakly associated along the a axis due to the close approach of the tert-butylcarbamoyl groups (2.55 Å).
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Paolillo R, Gallo V, Mastrorilli P, Nobile CF, Rosé J, Braunstein P. Tri- and Tetranuclear Homo- and Heterometallic Clusters as Precatalysts for the Pauson−Khand Reaction. Organometallics 2008. [DOI: 10.1021/om7010112] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Rossella Paolillo
- Department of Water Engineering and of Chemistry, Polytechnic of Bari, Via Orabona, 4 I-70125 Bari, Italy, and Laboratoire de Chimie de Coordination, Institut de Chimie (UMR 7177 CNRS), Université Louis Pasteur, 4 Rue Blaise Pascal, F-67070 Strasbourg, France
| | - Vito Gallo
- Department of Water Engineering and of Chemistry, Polytechnic of Bari, Via Orabona, 4 I-70125 Bari, Italy, and Laboratoire de Chimie de Coordination, Institut de Chimie (UMR 7177 CNRS), Université Louis Pasteur, 4 Rue Blaise Pascal, F-67070 Strasbourg, France
| | - Piero Mastrorilli
- Department of Water Engineering and of Chemistry, Polytechnic of Bari, Via Orabona, 4 I-70125 Bari, Italy, and Laboratoire de Chimie de Coordination, Institut de Chimie (UMR 7177 CNRS), Université Louis Pasteur, 4 Rue Blaise Pascal, F-67070 Strasbourg, France
| | - Cosimo F. Nobile
- Department of Water Engineering and of Chemistry, Polytechnic of Bari, Via Orabona, 4 I-70125 Bari, Italy, and Laboratoire de Chimie de Coordination, Institut de Chimie (UMR 7177 CNRS), Université Louis Pasteur, 4 Rue Blaise Pascal, F-67070 Strasbourg, France
| | - Jacky Rosé
- Department of Water Engineering and of Chemistry, Polytechnic of Bari, Via Orabona, 4 I-70125 Bari, Italy, and Laboratoire de Chimie de Coordination, Institut de Chimie (UMR 7177 CNRS), Université Louis Pasteur, 4 Rue Blaise Pascal, F-67070 Strasbourg, France
| | - Pierre Braunstein
- Department of Water Engineering and of Chemistry, Polytechnic of Bari, Via Orabona, 4 I-70125 Bari, Italy, and Laboratoire de Chimie de Coordination, Institut de Chimie (UMR 7177 CNRS), Université Louis Pasteur, 4 Rue Blaise Pascal, F-67070 Strasbourg, France
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Trabocchi A, Scarpi D, Guarna A. Structural diversity of bicyclic amino acids. Amino Acids 2007; 34:1-24. [PMID: 17701095 DOI: 10.1007/s00726-007-0588-y] [Citation(s) in RCA: 53] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/22/2007] [Accepted: 07/12/2007] [Indexed: 10/23/2022]
Abstract
Over the years biomedical research has been constantly oriented towards the development of new therapeutics based on bioactive peptides and their analogues. In particular, the generation of compounds having structures and functions similar to bioactive peptides, named "peptidomimetics", raised much interest among organic and medicinal chemists due to the possibility by using such compounds to improve both potency and stability of peptidic lead compounds. In the context of this research area, unnatural amino acids are of great interest in drug discovery, and their use as new building blocks for the development of peptidomimetics with high diversity level and possessing high-ordered structures is of special interest. In particular, medicinal chemistry has taken advantage of the use of amino acid homologues and of cyclic and polycyclic templates to introduce elements of diversity for the generation of new molecules as drug candidates. Bicyclic amino acids have been developed as reverse turn mimetics and dipeptide isosteres, and the constraint imposed by their structures has been reported as a tool for controlling the conformational preferences of modified peptides. Moreover, synthetic efforts have been driven to the generation of diverse structures based on the modulation of ring size and scaffold decoration by suitable functional groups. Herein is reported an overview of different classes of bicyclic amino acids, taking into account the strategies to achieve structurally diverse templates, and some implications in medicinal chemistry are also disclosed.
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Affiliation(s)
- A Trabocchi
- Dipartimento di Chimica Organica Ugo Schiff, Università degli Studi di Firenze, Polo Scientifico e Tecnologico, Sesto Fiorentino, Firenze, Italy.
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Gredicak M, Kolonić A, Jerić I. Novel chloroenyne-modified amino acid derivatives. Amino Acids 2007; 35:185-94. [PMID: 17619116 DOI: 10.1007/s00726-007-0572-6] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/12/2007] [Accepted: 06/15/2007] [Indexed: 10/23/2022]
Abstract
Three groups of chloroenyne-modified amino acids were synthesized. Chloroenyne moiety was attached at the N- or C-terminal amino acid (Tyr, Phe, Val, Gly, Lys) position carrying different protecting groups. Prepared derivatives will be used as building blocks in the synthesis of enediyne-peptide conjugates. Furthermore, reactivity of modified amino acids in the peptide bond formation reaction was tested.
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Affiliation(s)
- M Gredicak
- Division of Organic Chemistry and Biochemistry, Ruder Bos ković Institute, Zagreb, Croatia
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