1
|
Peñas-Sanjuán A, Chica-Armenteros JJ, Cruz-Sánchez R, García-Gallarín C, Melguizo M. Sequential Nitrile Amidination-Reduction as a Straightforward Procedure to Selective Linear Polyamine Preparation. J Org Chem 2023; 88:17274-17283. [PMID: 38006401 PMCID: PMC10729039 DOI: 10.1021/acs.joc.3c02128] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/19/2023] [Revised: 11/10/2023] [Accepted: 11/15/2023] [Indexed: 11/27/2023]
Abstract
A straightforward strategy toward the efficient synthesis of linear saturated polyamines containing 1,2-diaminoethane and/or 1,3-diaminopropane fragments has been developed. The procedure is based on the chemistry of 5- and 6-membered cyclic amidines, including their efficient synthesis from nitrile precursors and subsequent chemoselective reductive-opening by a borane-dimethyl sulfide complex. This two-step procedure provides a robust methodology for the synthesis of linear polyamine skeletons under nonharsh conditions and free of using selective protective groups or tedious workups.
Collapse
Affiliation(s)
- Antonio Peñas-Sanjuán
- Departamento de Química Inorgánica
y Orgánica. Facultad de Ciencias Experimentales, Universidad de Jaén, 23071 Jaén, Spain
| | - Jose J. Chica-Armenteros
- Departamento de Química Inorgánica
y Orgánica. Facultad de Ciencias Experimentales, Universidad de Jaén, 23071 Jaén, Spain
| | - Rubén Cruz-Sánchez
- Departamento de Química Inorgánica
y Orgánica. Facultad de Ciencias Experimentales, Universidad de Jaén, 23071 Jaén, Spain
| | - Celeste García-Gallarín
- Departamento de Química Inorgánica
y Orgánica. Facultad de Ciencias Experimentales, Universidad de Jaén, 23071 Jaén, Spain
| | - Manuel Melguizo
- Departamento de Química Inorgánica
y Orgánica. Facultad de Ciencias Experimentales, Universidad de Jaén, 23071 Jaén, Spain
| |
Collapse
|
2
|
Ingham A, Kostelnik TI, McNeil BL, Patrick BO, Choudhary N, Jaraquemada-Peláez MDG, Orvig C. Getting a lead on Pb 2+-amide chelators for 203/212Pb radiopharmaceuticals. Dalton Trans 2021; 50:11579-11595. [PMID: 34352061 DOI: 10.1039/d1dt01653a] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
Amide-based chelators DTPAm, EGTAm and ampam were synthesized to investigate which chelator most ideally coordinates [nat/203Pb]Pb2+ ions for potential radiopharmaceutical applications. 1H NMR spectroscopy was used to study each metal-ligand complex in the solution state. The 1H NMR spectrum of [Pb(DTPAm)]2+ revealed minimal isomerization and fluxional behaviour compared to [Pb(EGTAm)]2+ and [Pb(ampam)]2+, both of which showed fewer spectral changes indicative of less static behaviour. The solid-state coordination properties of each complex were also examined from single crystal structures that were studied by X-ray diffraction (XRD). In the solid-state, octadentate DTPAm coordinated Pb2+ to form an eight-coordinate hemidirected complex; octadentate EGTAm coordinated Pb2+ forming a ten-coordinate holodirected complex with a bidentate NO3- ion also coordinated to the metal centre; decadentate ampam completely encapsulated the Pb2+ ion to form a ten-coordinate holodirected complex with a C2 axis of symmetry. Potentiometric titrations were carried out to assess the thermodynamic stability of each metal-ligand complex. The pM values obtained for [Pb(DTPAm)]2+, [Pb(EGTAm)]2+ and [Pb(ampam)]2+ were 9.7, 7.2 and 10.2, respectively. The affinity of each chelator for Pb2+ ions was tested by [203Pb]Pb2+ radiolabeling studies to evaluate their prospects as chelators for [203/212Pb]Pb2+-based radiopharmaceuticals. DTPAm radiolabeled [203Pb]Pb2+ ions achieving molar activities as high as 3.5 MBq μmol-1 within 15 minutes, at 25 °C, whereas EGTAm and ampam produced lower molar activities of 0.25 MBq μmol-1 within 30 minutes, at 37 °C. EGTAm and ampam were therefore deemed unsuitable for [203/212Pb]Pb2+-based radiopharmaceutical applications, while DTPAm warrants further studies.
Collapse
Affiliation(s)
- Aidan Ingham
- Medicinal Inorganic Chemistry Group, Department of Chemistry, University of British Columbia, 2036 Main Mall, Vancouver, British Columbia V6 T 1Z1, Canada.
| | | | | | | | | | | | | |
Collapse
|
3
|
Martinelli J, Remotti D, Tei L. Selective functionalization of 6-amino-6-methyl-1,4-perhydrodiazepine for the synthesis of a library of polydentate chelators. Org Biomol Chem 2020; 18:5245-5252. [PMID: 32614034 DOI: 10.1039/d0ob00980f] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Polydentate chelators are an important part of an imaging probe, which consists of an agent that usually produces signals for imaging purposes connected to a targeting moiety. The goal of this study was to set up a generic protocol to prepare a library of polydentate ligands having a 6-amino-6-methyl-1,4-perhydrodiazepine (AMPED) core and able to chelate metal ions of interest for various diagnostic imaging techniques, including Magnetic Resonance Imaging (MRI), Positron Emission Tomography (PET) and Single-Photon Emission Computed Tomography (SPECT). These ions, among which we can include Mn(ii), Cu(ii), Al(iii) or Ga(iii), require penta- or hexa-dentate chelators for this purpose, and the AMPED scaffold has considerable potential to support various pendant arms for coordination of such ions. AMPED already has three amino nitrogen donors; thus, only two or three additional arms should be introduced to obtain penta- or hexa-dentate systems. This condition implies that symmetrical or asymmetrical structures have to be developed, depending on the functionalization of cyclic and exocyclic amines. Starting from easily available materials, we have designed a convenient protocol for the preparation of multiple AMPED-based ligands endowed with different characteristics, several of which were synthesized as examples.
Collapse
Affiliation(s)
- Jonathan Martinelli
- Dipartimento di Scienze e Innovazione Tecnologica (DiSIT), Università del Piemonte Orientale "A. Avogadro", Viale Michel 11, 15121 Alessandria, Italy.
| | - Davide Remotti
- Dipartimento di Scienze e Innovazione Tecnologica (DiSIT), Università del Piemonte Orientale "A. Avogadro", Viale Michel 11, 15121 Alessandria, Italy.
| | - Lorenzo Tei
- Dipartimento di Scienze e Innovazione Tecnologica (DiSIT), Università del Piemonte Orientale "A. Avogadro", Viale Michel 11, 15121 Alessandria, Italy.
| |
Collapse
|
4
|
Smrečki N, Jović O, Kukovec BM, Šimunić E, Vuk S, Skuhala A, Babić M, Rončević T, Ilić N, Kekez I, Matković-Čalogović D, Popović Z. Copper(II) complexes with N-alkyliminodiacetamide ligands. Preparation, structural, spectroscopic and DFT studies and biological evaluation. Inorganica Chim Acta 2018. [DOI: 10.1016/j.ica.2017.11.038] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
|
5
|
Influence of the non-coordinating alkyl chain type in N -alkylated iminodiacetamides on the stability and structure of their complexes with nickel(II) and cobalt(II). Polyhedron 2017. [DOI: 10.1016/j.poly.2017.03.060] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
|
6
|
Mohamadi A, Miller LW. Efficient route to pre-organized and linear polyaminopolycarboxylates: Cy-TTHA, Cy-DTPA and mono/di- reactive, tert-butyl protected TTHA/Cy-TTHA. Tetrahedron Lett 2017; 58:1441-1444. [PMID: 29176914 PMCID: PMC5699510 DOI: 10.1016/j.tetlet.2017.02.056] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Abstract
Pre-organized polyaminopolycarboxylate chelators Cy-TTHA and Cy-DTPA were synthesized via modular five-step syntheses from commercially available starting materials in ~ 62% and 47% overall yields, respectively. Furthermore, strategies are reported for the efficient preparation of mono- and di-reactive, tert-butyl-protected TTHA/Cy-TTHA to selectively functionalize central chelators' carboxylic acids.
Collapse
Affiliation(s)
- Ali Mohamadi
- University of Illinois at Chicago, Department of Chemistry, 845 W. Taylor Street, MC 111, Chicago, IL 60607
| | - Lawrence W Miller
- University of Illinois at Chicago, Department of Chemistry, 845 W. Taylor Street, MC 111, Chicago, IL 60607
| |
Collapse
|
7
|
Mohamadi A, Miller LW. Brightly Luminescent and Kinetically Inert Lanthanide Bioprobes Based on Linear and Preorganized Chelators. Bioconjug Chem 2016; 27:2540-2548. [PMID: 27684450 DOI: 10.1021/acs.bioconjchem.6b00473] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
The synthesis, photophysical properties, and kinetic stability of a series of water-soluble, highly emissive Tb(III) and Eu(III) complexes featuring triethylenetetraamine hexaacetic acid (TTHA) and cyclohexyl triethylenetetraamine hexaacetic acid (cyTTHA) chelator scaffolds and carbostyril sensitizers are reported. The unique and modular design of the chelators gives rise to striking quantum yields of emission in aqueous solutions (up to 54%) as well as the characteristic lanthanides' photophysical properties (long excited-state lifetimes, large effective Stokes shifts, and narrow emission peaks). Furthermore, the preorganized chelators (L3, L4, and L6) bind metal within minutes at ambient temperature yet exhibit substantial resistance to transchelation in the presence of a challenge solution (EDTA, 1 mM). Moreover, the Eu(III) complex of L4 remains stably luminescent in HeLa cells over hours, demonstrating the suitability of these compounds for live-cell imaging applications. Representative chelators suitable for derivatization and protein bioconjugation were also prepared that were functionalized with clickable azide and alkyne moieties, biotin, and trimethoprim (TMP). With exceptional long-wavelength brightness, enhanced kinetic inertness, and an adaptable synthetic route, the reported lanthanide complexes are promising probes and labels for time-gated bioanalysis, biosensing, and optical microscopy.
Collapse
Affiliation(s)
- Ali Mohamadi
- Department of Chemistry, University of Illinois at Chicago , 845 West Taylor Street, MC 111, Chicago, Illinois 60607, United States
| | - Lawrence W Miller
- Department of Chemistry, University of Illinois at Chicago , 845 West Taylor Street, MC 111, Chicago, Illinois 60607, United States
| |
Collapse
|
8
|
|
9
|
Deslandes S, Galaup C, Poole R, Mestre-Voegtlé B, Soldevila S, Leygue N, Bazin H, Lamarque L, Picard C. Synthesis and optical properties of macrocyclic lanthanide(III) chelates as new reagents for luminescent biolabeling. Org Biomol Chem 2012; 10:8509-23. [PMID: 23011114 DOI: 10.1039/c2ob26311d] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
Abstract
The convenient and efficient synthesis of two macrocyclic ligands (15- and 18-membered) based on a dipyrido-6,7,8,9-tetrahydrophenazine (dpqc) or 2,2':6',2''-terpyridine (tpy) heterocycle and a DTTA (diethylenetriaminetriacetic acid) skeleton is described. In these ligands the DTTA skeleton contains an additional extracyclic functionality (NH(2) group) suitable for covalent attachment to bioactive molecules. These octa- and nonadentate ligands form very stable and luminescent neutral lanthanide complexes in aqueous solutions at physiological pH. The corresponding Eu(III) and Tb(III) complexes are characterized by a maximum absorption wavelength compatible with nitrogen laser excitation (337 nm) and attractive lifetimes and quantum yields. Further introduction of a maleimide bioconjugatable handle in the Eu(III) complexes was investigated and a valuable luminescence brightness above 1500 dm(3) mol(-1) cm(-1) at 337 nm was obtained with the corresponding Eu(III) tpy-derivative. Finally, these two luminescent chelates were grafted onto thiol residues of a model antibody (Mab GSS11) without loss of their luminescent properties.
Collapse
|
10
|
Takayama Y, Yoshiura T, Nishie A, Nakayama T, Hatakenaka M, Kato N, Yoshise S, Keupp J, Burdinski D, Honda H. Ytterbium-based PARACEST agent: feasibility of CEST imaging on a clinical MR scanner. Magn Reson Med Sci 2012; 11:35-41. [PMID: 22450385 DOI: 10.2463/mrms.11.35] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022] Open
Abstract
PURPOSE We investigated the feasibility of performing chemical exchange saturation transfer (CEST) imaging using ytterbium-based paramagnetic CEST (PARACEST) agents on a clinical magnetic resonance (MR) scanner. MATERIALS AND METHODS We prepared solutions of 3 different ytterbium-based PARACEST agents at concentrations of 5, 10, 20, and 50 mM at a pH of 7.4 and at a concentration of 50 mM at pHs of 3.0, 5.0, 7.4, and 9.5. We acquired images with a turbo spin echo technique using a quadrature head coil and a clinical 3.0-tesla MR system in accordance with the safety limits of the specific absorption rate (SAR). We acquired CEST images with presaturation offset frequencies from -5,000 Hz (-39.1 ppm) to 5,000 Hz (39.1 ppm) with an interval of 500 Hz (3.9 ppm) for each condition. We repeated each scan 3 times and then calculated the mean and standard deviations of the magnitude of the CEST effect at different concentrations and pH values for each agent. We used one-way analysis of variance and Tukey's honestly significant difference post hoc test to compare mean values of the magnitude of the CEST effect obtained at different concentrations and pH values. P < 0.05 was considered significant. RESULTS PARACEST agents showed a strong CEST effect at their specific presaturation offset frequencies. For each agent, the CEST effect showed significant concentration dependency (P < 0.05), increasing with agent concentration, and significant pH dependency (P < 0.05), with strong effect near physiological pH. CONCLUSION CEST imaging using ytterbium-based PARACEST agents might be feasible on a clinical MR scanner with further modifications, such as adjustments of the presaturation radiofrequency pulse and imaging protocols.
Collapse
Affiliation(s)
- Yukihisa Takayama
- Department of Clinical Radiology, Graduate School of Medical Sciences, Kyushu University, 3-1-1 Maidashi, Higashi-ku, Fukuoka 812-8582, Japan.
| | | | | | | | | | | | | | | | | | | |
Collapse
|
11
|
Dou D, Mandadapu SR, Alliston KR, Kim Y, Chang KO, Groutas WC. Design and synthesis of inhibitors of noroviruses by scaffold hopping. Bioorg Med Chem 2011; 19:5749-55. [PMID: 21893416 DOI: 10.1016/j.bmc.2011.08.032] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/09/2011] [Revised: 08/06/2011] [Accepted: 08/15/2011] [Indexed: 11/30/2022]
Abstract
A scaffold hopping strategy was employed to identify new chemotypes that inhibit noroviruses. The replacement of the cyclosulfamide scaffold by an array of heterocyclic scaffolds lead to the identification of additional series of compounds that possessed anti-norovirus activity in a cell-based replicon system.
Collapse
Affiliation(s)
- Dengfeng Dou
- Department of Chemistry, Wichita State University, Wichita, KS 67260, United States
| | | | | | | | | | | |
Collapse
|
12
|
Bechara G, Leygue N, Galaup C, Mestre-Voegtlé B, Picard C. Polyazamacrocycles based on a tetraaminoacetate moiety and a (poly)pyridine intracyclic unit: direct synthesis and application to the photosensitization of Eu(III) and Tb(III) ions in aqueous solutions. Tetrahedron 2010. [DOI: 10.1016/j.tet.2010.09.052] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
|
13
|
Martinelli J, Balali-Mood B, Panizzo R, Lythgoe MF, White AJP, Ferretti P, Steinke JHG, Vilar R. Coordination chemistry of amide-functionalised tetraazamacrocycles: structural, relaxometric and cytotoxicity studies. Dalton Trans 2010; 39:10056-67. [PMID: 20877892 DOI: 10.1039/c0dt00815j] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
Three different tetraazamacrocyclic ligands containing four amide substituents that feature groups (namely allyl, styryl and propargyl groups) suitable for polymerisation have been synthesised. Gadolinium(III) complexes of these three ligands have been prepared as potential monomers for the synthesis of polymeric MRI contrast agents. To assess the potential of these monomers as MRI contrast agents, their relaxation enhancement properties and cytotoxicity have been determined. A europium(III) complex of one of these ligands (with propargyl substituents) is also presented together with its PARACEST properties. In addition, to gain further insight into the coordination chemistry of the tetra-propargyl substituted ligand, the corresponding zinc(II) and cadmium(II) complexes have been prepared. The X-ray crystal structures of the tetra-propargyl ligand and its corresponding gadolinium(III), zinc(II) and cadmium(II) complexes are also presented.
Collapse
|
14
|
Burdinski D, Pikkemaat JA, Lub J, de Peinder P, Nieto Garrido L, Weyhermüller T. Lanthanide complexes of triethylenetetramine tetra-, penta-, and hexaacetamide ligands as paramagnetic chemical exchange-dependent saturation transfer contrast agents for magnetic resonance imaging: nona- versus decadentate coordination. Inorg Chem 2010; 48:6692-712. [PMID: 19507818 DOI: 10.1021/ic900652y] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
The solid state and solution structure of a series of lanthanide complexes of the decadentate ligand triethylenetetramine-N,N,N',N'',N''',N'''-hexaacetamide, (ttham), its two decadentate derivatives di-tert-butyl N,N,N''',N'''-tetra(carbamoylmethyl)-triethylenetetramine-N',N''-diacetate (Bu(2)ttha-tm) and N,N,N''',N'''-tetra(carbamoylmethyl)-triethylenetetramine-N',N''-diacetic acid (H(2)ttha-tm), and its two nonadentate derivatives N-benzyl-triethylenetetramine-N,N',N'',N''',N'''-pentaacetamide (1bttpam) and N'-benzyl-triethylenetetramine-N,N,N'',N''',N'''-pentaacetamide (4bttpam) have been investigated by infrared and Raman spectroscopy, X-ray crystallography, cyclovoltammetry, and NMR spectroscopy. In these mononuclear lanthanide complexes, the first coordination sphere is generally saturated by four amine nitrogens of the triethylenetetramine ligand backbone and five or six carbonyl oxygen atoms of the pendent amide or acetate donor groups. In the [Ln(ttham)](3+) complex series, a switch from a decadentate to a nonadentate coordination occurs between [Er(ttham)](3+) and [Tm(ttham)](3+). This switch in coordination mode, which is caused by decreasing metal ion radii going from lanthanum to lutetium (lanthanide contraction), has no significant effect on the T(1)-relaxivity of these complexes. It is shown that the T(1)-relaxivity is dominated by second coordination sphere interactions, with an ascendant contribution of the classical dipolar relaxation mechanism for the earlier (Ce-Sm) and very late (Tm, Yb) lanthanides, and a prevailing Curie relaxation mechanism for most of the remaining paramagnetic lanthanide ions. In chemical exchange-dependent saturation transfer (CEST) (1)H NMR experiments, most of the above complexes exhibit multiple strong CEST peaks of the paramagnetically shifted amide protons spread over a >100 ppm chemical shift range. The effective CEST effect of the studied thulium complexes strongly depends on temperature and pH. The pH at which the CEST effect maximizes (generally between pH 7 and 8) is determined by the overall charge of the complex. Depending on the used saturation frequency offset, the temperature-dependence varies between the extremes of strongly linearly dependent and fully independent in the case of [Tm(ttham)](3+). In combination with the strong pH-dependence of the CEST effect at the latter frequency offset, this complex is highly suitable for simultaneous temperature and pH mapping using magnetic resonance imaging.
Collapse
Affiliation(s)
- Dirk Burdinski
- Department of Biomolecular Engineering, Philips Research Europe, High Tech Campus 11, 5656 AE Eindhoven, The Netherlands.
| | | | | | | | | | | |
Collapse
|