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Hennebelle M, Cirillo Y, Manick AD, Nuel D, Martinez A, Chatelet B. Synthesis, Resolution, and Absolute Configuration of a Phosphine-Based Hemicryptophane Cage with an Endo Phosphorus Lone Pair and Formation of the Corresponding Gold Complex. J Org Chem 2024; 89:4741-4748. [PMID: 38525898 DOI: 10.1021/acs.joc.3c02984] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/26/2024]
Abstract
The synthesis, characterization, and chiroptical properties of a new class of hemicryptophanes combining a phosphine moiety and a cyclotriveratrylene unit are reported. The synthesis was short and efficient. The racemic mixture of the cage was resolved by chiral high-performance liquid chromatography (HPLC), giving access to enantiopure molecular cages, whose absolute configurations could be assigned by electronic circular dichroism (ECD) spectroscopy. These new phosphines were then reacted with gold in order to make the corresponding enantiopure gold complexes. The X-ray structure reveals an endohedral functionalization of the cage with the gold metal entrapped in the heart of the cavity, leading to a Vbur of 58%. Moreover, the chirality of the cyclotriveratrylene unit was found to control the chiral arrangement of the aryl group linked to the phosphorus atom, located at the opposite side of the cavity.
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Affiliation(s)
- Marc Hennebelle
- Aix Marseille Univ, CNRS, Centrale Méditerranée, iSm2, Marseille 13397, France
| | - Yoann Cirillo
- Aix Marseille Univ, CNRS, Centrale Méditerranée, iSm2, Marseille 13397, France
| | | | - Didier Nuel
- Aix Marseille Univ, CNRS, Centrale Méditerranée, iSm2, Marseille 13397, France
| | - Alexandre Martinez
- Aix Marseille Univ, CNRS, Centrale Méditerranée, iSm2, Marseille 13397, France
| | - Bastien Chatelet
- Aix Marseille Univ, CNRS, Centrale Méditerranée, iSm2, Marseille 13397, France
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Diao D, Simaan AJ, Martinez A, Colomban C. Bioinspired complexes confined in well-defined capsules: getting closer to metalloenzyme functionalities. Chem Commun (Camb) 2023; 59:4288-4299. [PMID: 36946593 DOI: 10.1039/d2cc06990c] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/15/2023]
Abstract
Reproducing the key features offered by metalloprotein binding cavities is an attractive approach to overcome the main bottlenecks of current open artificial models (in terms of stability, efficiency and selectivity). In this context, this featured article brings together selected examples of recent developments in the field of confined bioinspired complexes with an emphasis on the emerging hemicryptophane caged ligands. In particular, we focused on (1) the strategies allowing the insulation and protection of complexes sharing similarities with metalloprotein active sites, (2) the confinement-induced improvement of catalytic efficiencies and selectivities and (3) very recent efforts that have been made toward the development of bioinspired complexes equipped with weakly binding artificial cavities.
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Affiliation(s)
- Donglin Diao
- Aix Marseille Univ, CNRS, Centrale Marseille, iSm2, Marseille, France.
| | - A Jalila Simaan
- Aix Marseille Univ, CNRS, Centrale Marseille, iSm2, Marseille, France.
| | | | - Cédric Colomban
- Aix Marseille Univ, CNRS, Centrale Marseille, iSm2, Marseille, France.
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Bravin C, Mazzeo G, Abbate S, Licini G, Longhi G, Zonta C. Helicity control of a perfluorinated carbon chain within a chiral supramolecular cage monitored by VCD. Chem Commun (Camb) 2022; 58:2152-2155. [PMID: 35059695 DOI: 10.1039/d1cc06861j] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
Abstract
Confinement within supramolecular systems is the leading technology to finely tune guest functional properties. In this communication we report the synthesis of a chiral supramolecular cage able to bias the helicity of a perfluorinated carbon chain hosted within the cage. We monitor the phenomenon of chiral induction by Vibrational Circular Dichroism (VCD) experiments complemented by DFT calculations over the possible conformers.
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Affiliation(s)
- Carlo Bravin
- Dipartimento di Scienze Chimiche, Università degli Studi di Padova, Padova, PD, Italy.
| | - Giuseppe Mazzeo
- Department of Molecular and Translational Medicine, Università di Brescia, Viale Europa 11, 25123 Brescia, BS, Italy.
| | - Sergio Abbate
- Department of Molecular and Translational Medicine, Università di Brescia, Viale Europa 11, 25123 Brescia, BS, Italy.
| | - Giulia Licini
- Dipartimento di Scienze Chimiche, Università degli Studi di Padova, Padova, PD, Italy.
| | - Giovanna Longhi
- Department of Molecular and Translational Medicine, Università di Brescia, Viale Europa 11, 25123 Brescia, BS, Italy.
| | - Cristiano Zonta
- Dipartimento di Scienze Chimiche, Università degli Studi di Padova, Padova, PD, Italy.
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Qiu G, Diao D, Chaussy L, Chevallier-Michaud S, Simaan AJ, Nava P, Martinez A, Colomban C. A caged tris(2-pyridylmethyl)amine ligand equipped with a C triazole-H hydrogen bonding cavity. Dalton Trans 2022; 51:10702-10706. [DOI: 10.1039/d2dt00607c] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A capped bioinspired ligand built from a tris(2-pyridyl-methyl)amine (TPA) unit and surmounted by a triazole-based intramolecular H-bonding secondary sphere, was prepared. The resulting cage structure describes a well-defined cavity combining...
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Qiu G, Khatmi DE, Martinez A, Nava P. Rationalization of chirality transfer and fast conformational changes in a tris(2-pyridylmethyl)amine-based cage. RSC Adv 2021; 11:13763-13768. [PMID: 35423903 PMCID: PMC8697529 DOI: 10.1039/d1ra01761f] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/05/2021] [Accepted: 04/01/2021] [Indexed: 11/22/2022] Open
Abstract
The key features that govern the chirality transfer in a structurally contracted covalent cage, consisting of a northern chiral cyclotriveratrylene (CTV) connected to a southern tris(2-pyridyl-methyl)amine (TPA) unit by three methyl bridges, are described. The preferential orientation of the propeller arrangement of TPA is dictated by its compact structure, with an arm of the TPA unit pointing inside the cage, together with the relative positioning of the three pyridines regarding the chiral CTV cap. The diastereomers with P/P (or M/M) configurations for the CTV and TPA units adopt eclipsed structures and were found to be more stable by 40 kJ mol-1 than the P/M (or M/P) diastereomer which displays a staggered arrangement. The existence of isomerization pathways between isomers of the cage with low energy barriers (38 kJ mol-1) accounts for the 1H-NMR signal, which is consistent with an averaged C 3 structure.
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Affiliation(s)
- Gege Qiu
- Aix Marseille Univ., CNRS, Centrale Marseille, iSm2 Marseille France
| | - Djamel Eddine Khatmi
- Aix Marseille Univ., CNRS, Centrale Marseille, iSm2 Marseille France
- Laboratory of Computational Chemistry and Nanostructures, University of 08 May 45 Guelma Algeria
| | | | - Paola Nava
- Aix Marseille Univ., CNRS, Centrale Marseille, iSm2 Marseille France
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Qiu G, Nava P, Martinez A, Colomban C. A tris(benzyltriazolemethyl)amine-based cage as a CuAAC ligand tolerant to exogeneous bulky nucleophiles. Chem Commun (Camb) 2021; 57:2281-2284. [DOI: 10.1039/d0cc08005e] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The canonical CuAAC–ligand TBTA was capped with a bowl-shaped unit yielding the cage Hm-TBTA. The shielded structure does not suffer from product inhibition effect and is remarkably tolerant to the biological CuAAC-inhibitor Glutathione.
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Affiliation(s)
- Gege Qiu
- Aix Marseille Univ
- CNRS
- Centrale Marseille
- iSm2
- Marseille
| | - Paola Nava
- Aix Marseille Univ
- CNRS
- Centrale Marseille
- iSm2
- Marseille
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Bravin C, Badetti E, Licini G, Zonta C. Tris(2-pyridylmethyl)amines as emerging scaffold in supramolecular chemistry. Coord Chem Rev 2021. [DOI: 10.1016/j.ccr.2020.213558] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
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Qiu G, Nava P, Colomban C, Martinez A. Control and Transfer of Chirality Within Well-Defined Tripodal Supramolecular Cages. Front Chem 2020; 8:599893. [PMID: 33240860 PMCID: PMC7670063 DOI: 10.3389/fchem.2020.599893] [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: 08/28/2020] [Accepted: 09/29/2020] [Indexed: 11/13/2022] Open
Abstract
The development of new strategies to turn achiral artificial hosts into highly desirable chiral receptors is a crucial challenge in order to advance the fields of asymmetric transformations and enantioselective sensing. Over the past few years, C3 symmetrical cages have emerged as interesting class of supramolecular hosts that have been reported as efficient scaffolds for chirality dynamics (such as generation, control, and transfer). On this basis, this mini review, which summarizes the existing examples of chirality control and propagation in tripodal supramolecular cages, aims at discussing the benefits and perspectives of this approach.
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Affiliation(s)
- Gege Qiu
- Aix Marseille Univ, CNRS, Centrale Marseille, iSm2, Marseille, France
| | - Paola Nava
- Aix Marseille Univ, CNRS, Centrale Marseille, iSm2, Marseille, France
| | - Cédric Colomban
- Aix Marseille Univ, CNRS, Centrale Marseille, iSm2, Marseille, France
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