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Čakić Semenčić M, Kovačević M, Barišić L. Recent Advances in the Field of Amino Acid-Conjugated Aminoferrocenes-A Personal Perspective. Int J Mol Sci 2024; 25:4810. [PMID: 38732028 PMCID: PMC11084972 DOI: 10.3390/ijms25094810] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/21/2024] [Revised: 04/19/2024] [Accepted: 04/23/2024] [Indexed: 05/13/2024] Open
Abstract
The development of turn-based inhibitors of protein-protein interactions has attracted considerable attention in medicinal chemistry. Our group has synthesized a series of peptides derived from an amino-functionalized ferrocene to investigate their potential to mimic protein turn structures. Detailed DFT and spectroscopic studies (IR, NMR, CD) have shown that, for peptides, the backbone chirality and bulkiness of the amino acid side chains determine the hydrogen-bond pattern, allowing tuning of the size of the preferred hydrogen-bonded ring in turn-folded structures. However, their biological potential is more dependent on their lipophilicity. In addition, our pioneering work on the chiroptical properties of aminoferrocene-containing peptides enables the correlation of their geometry with the sign of the CD signal in the absorption region of the ferrocene chromophore. These studies have opened up the possibility of using aminoferrocene and its derivatives as chirooptical probes for the determination of various chirality elements, such as the central chirality of amino acids and the helicity of peptide sequences.
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Affiliation(s)
| | | | - Lidija Barišić
- Department of Chemistry and Biochemistry, Faculty of Food Technology and Biotechnology, University of Zagreb, 10000 Zagreb, Croatia; (M.Č.S.); (M.K.)
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Novel ferrocene imide derivatives: synthesis, conformational analysis and X-ray structure. Heliyon 2022; 8:e09470. [PMID: 35647357 PMCID: PMC9131161 DOI: 10.1016/j.heliyon.2022.e09470] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/17/2022] [Revised: 03/22/2022] [Accepted: 05/13/2022] [Indexed: 12/02/2022] Open
Abstract
The synthesis and structural characterization of the ferrocene imide derivatives Fc−CO−NH−CO−Me (4), Fc−CO−NH−CO−Fc (7) and Fc−CO−NH−CO−Fn−CO−NH−CO−Fc (8) have been reported. The mononuclear, dinuclear and trinuclear ferrocene imides were prepared by the reaction of ferrocenecarboxamide (3), with acetyl chloride, ferrocenecarbonyl chloride (2) and ferrocene-1,1’-(dicarbonyl chloride) (6), respectively. IR spectroscopic analysis revealed the absence of intramolecular hydrogen bonds in solutions of imides 4, 7 and 8. The crystal packing of N-acetylferrocenecarboxamide (4) is characterized by N−H⋯O hydrogen bonds forming centrosymmetric dimers, while the molecules of its homologue N-methylferrocenecarboxamide (5) are self-assembled by intermolecular N−H⋯O bonds into infinite chains. A detailed conformational analysis (DFT study) suggests the cis-trans configuration of ferrocene imide derivative 7 in solution. The effect of different substituents attached to bridged imide nitrogen on conformational properties of bis-ferrocenyl imides was further investigated and results compared to the existing experimental data.
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Nuskol M, Šutalo P, Kodrin I, Semenčić MČ. Sensing of the Induced Helical Chirality by the Chiroptical Response of the Ferrocene Chromophore. Eur J Inorg Chem 2021. [DOI: 10.1002/ejic.202100880] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
Affiliation(s)
- Marko Nuskol
- Department of Chemistry and Biochemistry Faculty of Food Technology and Biotechnology University of Zagreb Pierottijeva 6 10000 Zagreb Croatia
| | - Petar Šutalo
- Department of Chemistry Faculty of Science University of Zagreb Horvatovac 102a 10000 Zagreb Croatia
| | - Ivan Kodrin
- Department of Chemistry Faculty of Science University of Zagreb Horvatovac 102a 10000 Zagreb Croatia
| | - Mojca Čakić Semenčić
- Department of Chemistry and Biochemistry Faculty of Food Technology and Biotechnology University of Zagreb Pierottijeva 6 10000 Zagreb Croatia
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Kovačević M, Čakić Semenčić M, Radošević K, Molčanov K, Roca S, Šimunović L, Kodrin I, Barišić L. Conformational Preferences and Antiproliferative Activity of Peptidomimetics Containing Methyl 1'-Aminoferrocene-1-carboxylate and Turn-Forming Homo- and Heterochiral Pro-Ala Motifs. Int J Mol Sci 2021; 22:ijms222413532. [PMID: 34948332 PMCID: PMC8705031 DOI: 10.3390/ijms222413532] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/24/2021] [Revised: 12/09/2021] [Accepted: 12/14/2021] [Indexed: 11/16/2022] Open
Abstract
The concept of peptidomimetics is based on structural modifications of natural peptides that aim not only to mimic their 3D shape and biological function, but also to reduce their limitations. The peptidomimetic approach is used in medicinal chemistry to develop drug-like compounds that are more active and selective than natural peptides and have fewer side effects. One of the synthetic strategies for obtaining peptidomimetics involves mimicking peptide α-helices, β-sheets or turns. Turns are usually located on the protein surface where they interact with various receptors and are therefore involved in numerous biological events. Among the various synthetic tools for turn mimetic design reported so far, our group uses an approach based on the insertion of different ferrocene templates into the peptide backbone that both induce turn formation and reduce conformational flexibility. Here, we conjugated methyl 1'-aminoferrocene-carboxylate with homo- and heterochiral Pro-Ala dipeptides to investigate the turn formation potential and antiproliferative properties of the resulting peptidomimetics 2-5. Detailed spectroscopic (IR, NMR, CD), X-ray and DFT studies showed that the heterochiral conjugates 2 and 3 were more suitable for the formation of β-turns. Cell viability study, clonogenic assay and cell death analysis showed the highest biological potential of homochiral peptide 4.
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Affiliation(s)
- Monika Kovačević
- Department of Chemistry and Biochemistry, Faculty of Food Technology and Biotechnology, University of Zagreb, 10000 Zagreb, Croatia; (M.K.); (M.Č.S.); (L.Š.)
| | - Mojca Čakić Semenčić
- Department of Chemistry and Biochemistry, Faculty of Food Technology and Biotechnology, University of Zagreb, 10000 Zagreb, Croatia; (M.K.); (M.Č.S.); (L.Š.)
| | - Kristina Radošević
- Department of Biochemical Engineering, Faculty of Food Technology and Biotechnology, University of Zagreb, 10000 Zagreb, Croatia;
| | - Krešimir Molčanov
- Division of Physical Chemistry, Ruđer Bošković Institute, 10000 Zagreb, Croatia;
| | - Sunčica Roca
- NMR Centre, Ruđer Bošković Institute, 10000 Zagreb, Croatia;
| | - Lucija Šimunović
- Department of Chemistry and Biochemistry, Faculty of Food Technology and Biotechnology, University of Zagreb, 10000 Zagreb, Croatia; (M.K.); (M.Č.S.); (L.Š.)
| | - Ivan Kodrin
- Department of Organic Chemistry, Faculty of Science, University of Zagreb, 10000 Zagreb, Croatia
- Correspondence: (I.K.); (L.B.); Tel.: +385-1-4606-403 (I.K.); +385-1-4605-069 (L.B.)
| | - Lidija Barišić
- Department of Chemistry and Biochemistry, Faculty of Food Technology and Biotechnology, University of Zagreb, 10000 Zagreb, Croatia; (M.K.); (M.Č.S.); (L.Š.)
- Correspondence: (I.K.); (L.B.); Tel.: +385-1-4606-403 (I.K.); +385-1-4605-069 (L.B.)
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Nuskol M, Šutalo P, Đaković M, Kovačević M, Kodrin I, Čakić Semenčić M. Testing the Potential of the Ferrocene Chromophore as a Circular Dichroism Probe for the Assignment of the Screw-Sense Preference of Tripeptides. Organometallics 2021. [DOI: 10.1021/acs.organomet.1c00138] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
Affiliation(s)
- Marko Nuskol
- Department of Chemistry and Biochemistry, Faculty of Food Technology and Biotechnology, University of Zagreb, Pierottijeva 6, 10000 Zagreb, Croatia
| | - Petar Šutalo
- Department of Chemistry, Faculty of Science, University of Zagreb, Horvatovac 102a, 10000 Zagreb, Croatia
| | - Marijana Đaković
- Department of Chemistry, Faculty of Science, University of Zagreb, Horvatovac 102a, 10000 Zagreb, Croatia
| | - Monika Kovačević
- Department of Chemistry and Biochemistry, Faculty of Food Technology and Biotechnology, University of Zagreb, Pierottijeva 6, 10000 Zagreb, Croatia
| | - Ivan Kodrin
- Department of Chemistry, Faculty of Science, University of Zagreb, Horvatovac 102a, 10000 Zagreb, Croatia
| | - Mojca Čakić Semenčić
- Department of Chemistry and Biochemistry, Faculty of Food Technology and Biotechnology, University of Zagreb, Pierottijeva 6, 10000 Zagreb, Croatia
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Román T, Ramirez D, Fierro-Medina R, Santillan R, Farfán N. Ferrocene and Organotin (IV) Conjugates Containing Amino Acids and Peptides: A Promising Strategy for Searching New Therapeutic and Diagnostic Tools. CURR ORG CHEM 2020. [DOI: 10.2174/1385272824999201001154259] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
Abstract
Organometallic complexes are an important class of synthetic reagents and are of
great interest due to their versatility and wide biological application. The cationic nature of the
coordination nucleus facilitates its interaction with biological molecules such as amino acids,
proteins, and nucleic acids. The functionalization of peptides or amino acids with organometallic
motifs is a novel strategy for the design and development of molecules with greater biological
activity, stability in biological environments, and selectivity for specific targets, which
make them valuable tools for designing and obtaining molecules with therapeutic applications.
The physicochemical properties of ferrocene make it ideal for drug development, due to its
structure, stability in aqueous solutions, redox properties, and low toxicity. In the same way,
organotin (IV) derivatives have great potential for drug development because of their multiple
biological activities, wide structural versatility, high degree of stability, and low toxicity.
However, the synthesis of these drugs based on organometallic molecules containing ferrocene or organotin (IV) is
quite complex and represents a challenge nowadays; for this reason, it is necessary to design and implement procedures
to obtain molecules with a high degree of purity, in sufficient quantities, and at low cost. This review describes
the strategies of synthesis used up to now for the preparation of organometallic amino acids and peptides
containing ferrocene or organotin (IV) derivates, as well as their impact on the development of therapeutic agents.
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Affiliation(s)
- Tatiana Román
- Departamento de Farmacia, Universidad Nacional de Colombia, Carrera 45 # 26-85, Bogota D.C., Colombia
| | - David Ramirez
- Departamento de Quimica. Facultad de Ciencias, Universidad Nacional de Colombia, Carrera 45 # 26-85, Bogota D.C., Colombia
| | - Ricardo Fierro-Medina
- Departamento de Quimica. Facultad de Ciencias, Universidad Nacional de Colombia, Carrera 45 # 26-85, Bogota D.C., Colombia
| | - Rosa Santillan
- Departamento de Quimica, Centro de Investigacion y de Estudios Avanzados del IPN, Av Instituto Politecnico Nacional 2508, San Pedro Zacatenco, Gustavo A. Madero, 07360 Ciudad de Mexico, CDMX, Mexico
| | - Norberto Farfán
- Facultad de Quimica, Departamento de Quimica Organica, Universidad Nacional Autonoma de Mexico, Av. Universidad 3000, Circuito Exterior S/N Delegacion Coyoacan, C.P. 04510 Ciudad Universitaria, Ciudad de Mexico, CDMX, Mexico
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Datta D, Jana S, Tiwari O. Tubular to spherical mesoscopic self‐assembly of C‐ and N‐termini capped dileucines. Pept Sci (Hoboken) 2019. [DOI: 10.1002/pep2.24134] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Affiliation(s)
- Dhrubajyoti Datta
- Department of Chemistry, Chemical Biology Unit Indian Institute of Science Education and Research Pune India
| | - Saibal Jana
- Department of Bionano Technology Hanyang University Ansan Republic of Korea
| | - Omshanker Tiwari
- Department of Chemistry, Chemical Biology Unit Indian Institute of Science Education and Research Pune India
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Wright AJ, Hughes DL, Bulman Page PC, Stephenson GR. Induction of Planar Chirality Using Asymmetric Click Chemistry by a Novel Desymmetrisation of 1,3-Bisalkynyl Ferrocenes. European J Org Chem 2019. [DOI: 10.1002/ejoc.201901192] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Affiliation(s)
- Adam J. Wright
- School of Chemistry; University of East Anglia; Norwich Research Park NR4 7TJ Norfolk United Kingdom
| | - David L. Hughes
- School of Chemistry; University of East Anglia; Norwich Research Park NR4 7TJ Norfolk United Kingdom
| | - Phillip C. Bulman Page
- School of Chemistry; University of East Anglia; Norwich Research Park NR4 7TJ Norfolk United Kingdom
| | - G. Richard Stephenson
- School of Chemistry; University of East Anglia; Norwich Research Park NR4 7TJ Norfolk United Kingdom
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Nuskol M, Studen B, Meden A, Kodrin I, Čakić Semenčić M. Tight turn in dipeptide bridged ferrocenes: Synthesis, X-ray structural, theoretical and spectroscopic studies. Polyhedron 2019. [DOI: 10.1016/j.poly.2019.01.007] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
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Angelici G, Górecki M, Pescitelli G, Zanna N, Monari M, Tomasini C. Synthesis and structure analysis of ferrocene-containing pseudopeptides. Biopolymers 2017; 110. [PMID: 29058321 DOI: 10.1002/bip.23072] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/02/2017] [Revised: 09/11/2017] [Accepted: 09/20/2017] [Indexed: 11/06/2022]
Abstract
Ferrocene with its aromaticity and facile redox properties is an attractive moiety to be incorporated into functional moieties. Medicinal applications of ferrocene are well known and ferrocene itself shows cytotoxic and antianemic properties. In this article, we will describe the synthesis and the structure analysis of two pseudopeptides containing a ferrocene moiety as N-terminal group. After purification, Fc-l-Phe-d-Oxd-OBn [l-Phel-phenylalanine; d-Oxd(4R,5S)-4-Methyl-5-carboxy-oxazolidin-2-one] appears as bright brown solid that spontaneously forms brown needles. The X-ray diffraction of the crystals shows the presence of strong π interactions between the ferrocenyl moiety and the phenyl rings, while no NH•••OC hydrogen bonds are formed. This result is confirmed by FT-IR and 1 H NMR analysis. In contrast, both FT-IR and 1 H NMR analysis suggest that Fc-(l-Phe-d-Oxd)2 -OBn forms a turn conformation stabilized by intramolecular NH•••OC hydrogen bonds in solution. Chiroptical spectroscopies (ECD and VCD) substantially confirmed the absence of a well-defined folded structure. The presence of the Fc moiety is responsible for specific ECD signals, one of which displayed pronounced temperature dependence and is directly related with the helicity assumed by the Fc core. Solid-state ECD spectra were recorded and rationalized on the basis of the X-ray geometry and quantum-mechanical calculations.
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Affiliation(s)
- Gaetano Angelici
- Dipartimento di Chimica e Chimica Industriale, Università di Pisa - Via Moruzzi 13, Pisa, 56124, Italy
| | - Marcin Górecki
- Dipartimento di Chimica e Chimica Industriale, Università di Pisa - Via Moruzzi 13, Pisa, 56124, Italy
- Institute of Organic Chemistry - Polish Academy of Sciences - ul. Kasprzaka 44/52, Warsaw, 01-224, Poland
| | - Gennaro Pescitelli
- Dipartimento di Chimica e Chimica Industriale, Università di Pisa - Via Moruzzi 13, Pisa, 56124, Italy
| | - Nicola Zanna
- Dipartimento di Chimica "Giacomo Ciamician", Università di Bologna - Via Selmi, 2, Bologna, 40126, Italy
| | - Magda Monari
- Dipartimento di Chimica "Giacomo Ciamician", Università di Bologna - Via Selmi, 2, Bologna, 40126, Italy
| | - Claudia Tomasini
- Dipartimento di Chimica "Giacomo Ciamician", Università di Bologna - Via Selmi, 2, Bologna, 40126, Italy
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Kovačević M, Kodrin I, Roca S, Molčanov K, Shen Y, Adhikari B, Kraatz H, Barišić L. Helically Chiral Peptides That Contain Ferrocene‐1,1′‐diamine Scaffolds as a Turn Inducer. Chemistry 2017; 23:10372-10395. [DOI: 10.1002/chem.201701602] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/10/2017] [Indexed: 01/08/2023]
Affiliation(s)
- Monika Kovačević
- Department of Chemistry and BiochemistryFaculty of Food Technology and BiotechnologyUniversity of Zagreb Pierottijeva 6 Zagreb Croatia
| | - Ivan Kodrin
- Department of ChemistryFaculty of ScienceUniversity of Zagreb Horvatovac 102a Zagreb Croatia
| | - Sunčica Roca
- NMR CentreRuđer Bošković Institute Bijenička cesta 54 Zagreb Croatia
| | - Krešimir Molčanov
- Division of Physical ChemistryRuđer Bošković Institute Bijenička cesta 54 Zagreb Croatia
| | - Yuning Shen
- Department of Physical and Environmental SciencesUniversity of Toronto 1265 Military Trail Toronto M1C 1 A4 Canada
| | - Bimalendu Adhikari
- Department of Chemical SciencesIndian Institute of Science Education and Research (IISER) Mohali, Knowledge City, Sector 81, S. A. S. Nagar, Manauli PO Punjab 140306 India
| | - Heinz‐Bernhard Kraatz
- Department of Physical and Environmental SciencesUniversity of Toronto 1265 Military Trail Toronto M1C 1 A4 Canada
- Department of ChemistryUniversity of Toronto 80 St. George Street Toronto Ontario M5S 3H6 Canada
| | - Lidija Barišić
- Department of Chemistry and BiochemistryFaculty of Food Technology and BiotechnologyUniversity of Zagreb Pierottijeva 6 Zagreb Croatia
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Affiliation(s)
- Didier Astruc
- ISM, UMR CNRS 5255; Univ. Bordeaux; 33405 Talence Cedex France
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13
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Čakić Semenčić M, Kodrin I, Barišić L, Nuskol M, Meden A. Synthesis and Conformational Study of Monosubstituted Aminoferrocene‐Based Peptides Bearing Homo‐ and Heterochiral Pro‐Ala Sequences. Eur J Inorg Chem 2016. [DOI: 10.1002/ejic.201600648] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Mojca Čakić Semenčić
- Faculty of Food Technology and BiotechnologyUniversity of ZagrebPierottijeva 610000ZagrebCroatia
| | - Ivan Kodrin
- Department of ChemistryFaculty of ScienceUniversity of ZagrebHorvatovac 102A10000ZagrebCroatia
| | - Lidija Barišić
- Faculty of Food Technology and BiotechnologyUniversity of ZagrebPierottijeva 610000ZagrebCroatia
| | - Marko Nuskol
- Faculty of Food Technology and BiotechnologyUniversity of ZagrebPierottijeva 610000ZagrebCroatia
| | - Anton Meden
- Faculty of Chemistry and Chemical TechnologyUniversity of LjubljanaVecna pot 1131000LjubljanaSlovenia
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Kovačević M, Kodrin I, Cetina M, Kmetič I, Murati T, Semenčić MČ, Roca S, Barišić L. The conjugates of ferrocene-1,1'-diamine and amino acids. A novel synthetic approach and conformational analysis. Dalton Trans 2016; 44:16405-20. [PMID: 26308626 DOI: 10.1039/c5dt01610j] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A novel synthetic approach toward a poorly explored bioorganometallic consisting of ferrocene-1,1'-diamine bearing structurally and chirally diverse amino acid sequences is reported. Until now, ferrocene-1,1'-diamine was suitable for accommodating only identical amino acid sequences at its N-termini, leading to the symmetrically disubstituted homochiral products stabilized through a 14-membered intramolecular hydrogen-bonded ring as is seen in antiparallel β-sheet peptides. The key step of the novel synthetic pathway is the transformation of Ac-Ala-NH-Fn-COOH (5) (Fn = 1,1'-ferrocenylene) to orthogonally protected Ac-Ala-NH-Fn-NHBoc (7). The spectroscopic analysis (IR, NMR, CD) of the novel compounds, corroborated with DFT studies, suggests the interesting feature of the ferrocene-1,1'-diamine scaffold. The same hydrogen-bonding pattern, i.e. a 14-membered hydrogen-bonded ring, was determined both in solution and in the solid state, thus making them promising, yet simple scaffolds capable of mimicking β-sheet peptides. In vitro screening of potential anticancer activity in Hep G2 human liver carcinoma cells and Hs 578 T human breast cancer cells revealed a cytotoxic pattern for novel compounds (150-500 μM) with significantly decreased cell proliferation.
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Affiliation(s)
- Monika Kovačević
- Department of Chemistry and Biochemistry, Faculty of Food Technology and Biotechnology, University of Zagreb, Pierottijeva 6, Zagreb, Croatia.
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Semenčić MČ, Kovač V, Kodrin I, Barišić L, Rapić V. Synthesis and Conformational Study of Bioconjugates Derived from 1-Acetyl-1′-aminoferrocene and α-Amino Acids. Eur J Inorg Chem 2014. [DOI: 10.1002/ejic.201402837] [Citation(s) in RCA: 7] [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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16
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Conjugates of 1'-aminoferrocene-1-carboxylic acid and proline: synthesis, conformational analysis and biological evaluation. Molecules 2014; 19:12852-80. [PMID: 25153883 PMCID: PMC6271532 DOI: 10.3390/molecules190812852] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/01/2014] [Revised: 08/12/2014] [Accepted: 08/13/2014] [Indexed: 11/29/2022] Open
Abstract
Our previous studies showed that alteration of dipeptides Y-Fca-Ala-OMe (III) into Y-Ala-Fca-OMe (IV) (Y = Ac, Boc; Fca = 1'-aminoferrocene-1-carboxylic acid) significantly influenced their conformational space. The novel bioconjugates Y-Fca-Pro-OMe (1, Y = Ac; 2, Y = Boc) and Y-Pro-Fca-OMe (3, Y = Boc; 4, Y = Ac) have been prepared in order to investigate the influence of proline, a well-known turn-inducer, on the conformational properties of small organometallic peptides with an exchanged constituent amino acid sequences. For this purpose, peptides 1–4 were subjected to detailed spectroscopic analysis (IR, NMR, CD spectroscopy) in solution. The conformation of peptide 3 in the solid state was determined. Furthermore, the ability of the prepared conjugates to inhibit the growth of estrogen receptor-responsive MCF-7 mammary carcinoma cells and HeLa cervical carcinoma cells was tested.
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17
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1′-Acetylferrocene amino acid esters and amides. A simple model for parallel β-helical peptides. Tetrahedron 2014. [DOI: 10.1016/j.tet.2014.02.047] [Citation(s) in RCA: 6] [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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