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Shakaroun RM, Dhaini A, Ligny R, Alaaeddine A, Guillaume SM, Carpentier JF. Stereo-electronic Contributions in Yttrium-Mediated Stereoselective Ring-Opening Polymerization of Functional Racemic β-Lactones: ROP of 4-Alkoxymethylene-β-Propiolactones with Bulky Exocyclic Chains. Polym Chem 2023. [DOI: 10.1039/d2py01573k] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Abstract
Stereoselective ring-opening polymerization (ROP) of cyclic esters is the privileged strategy to access to stereoregular polyesters that are widely applied in various domains, such as in particular the biomedical and...
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Zhang X, Ligny R, Chewchanwuttiwong S, Hadade R, Laurent MY, Martel A, Jacquemmoz C, Lhoste J, Bricaud S, Py S, Dujardin G. δ-Valerolactamic Quaternary Amino Acid Derivatives: Enantiodivergent Synthesis and Evidence for Stereodifferentiated β-Turn-Inducing Properties. J Org Chem 2021; 86:8041-8055. [PMID: 33960779 DOI: 10.1021/acs.joc.1c00456] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
Abstract
Enantiopure (R) and (S) cyclic α,α-disubstituted amino acid derivatives displaying a δ-valerolactam side chain were prepared from a common isoxazolidine precursor. The (R)-configured δ-valerolactam 11 was converted into diastereoisomeric pseudopeptides to investigate its ability to induce secondary structures in peptidomimetics. Conformational studies of these pseudopeptides were carried out in the solid state (X-ray diffraction), in solution (NMR analyses), and in silico (computer-aided conformational analysis), which demonstrated that such quaternary amino acids induce β-turn conformations stable enough to be retained in polar media (DMSO). Incorporation of this new type of α,α-disubstituted amino acid into a representative pseudopeptidic sequence by N- then C-elongation and N-debenzylation is also described herein and could serve for the synthesis of various structured peptidomimetics.
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Affiliation(s)
- Xiaofei Zhang
- Institut des Molécules et Matériaux du Mans (IMMM) - UMR 6283 CNRS-Le Mans Université, Equipe Méthodologie et Synthèse Organique, F-72085 Le Mans Cedex 09, France.,Univ. Grenoble Alpes, DCM, F-38000 Grenoble, France.,CNRS, DCM, F-38000 Grenoble, France
| | - Romain Ligny
- Institut des Molécules et Matériaux du Mans (IMMM) - UMR 6283 CNRS-Le Mans Université, Equipe Méthodologie et Synthèse Organique, F-72085 Le Mans Cedex 09, France
| | - Sopa Chewchanwuttiwong
- Institut des Molécules et Matériaux du Mans (IMMM) - UMR 6283 CNRS-Le Mans Université, Equipe Méthodologie et Synthèse Organique, F-72085 Le Mans Cedex 09, France.,Prince of Songkla University, Faculty of Science and Industrial Technology Surat Thani 84000, Thailand
| | - Rawan Hadade
- Institut des Molécules et Matériaux du Mans (IMMM) - UMR 6283 CNRS-Le Mans Université, Equipe Méthodologie et Synthèse Organique, F-72085 Le Mans Cedex 09, France
| | - Mathieu Y Laurent
- Institut des Molécules et Matériaux du Mans (IMMM) - UMR 6283 CNRS-Le Mans Université, Equipe Méthodologie et Synthèse Organique, F-72085 Le Mans Cedex 09, France
| | - Arnaud Martel
- Institut des Molécules et Matériaux du Mans (IMMM) - UMR 6283 CNRS-Le Mans Université, Equipe Méthodologie et Synthèse Organique, F-72085 Le Mans Cedex 09, France
| | - Corentin Jacquemmoz
- Institut des Molécules et Matériaux du Mans (IMMM) - UMR 6283 CNRS-Le Mans Université, Equipe Méthodologie et Synthèse Organique, F-72085 Le Mans Cedex 09, France
| | - Jérôme Lhoste
- Institut des Molécules et Matériaux du Mans (IMMM) - UMR 6283 CNRS-Le Mans Université, Equipe Méthodologie et Synthèse Organique, F-72085 Le Mans Cedex 09, France
| | - Sullivan Bricaud
- Institut des Molécules et Matériaux du Mans (IMMM) - UMR 6283 CNRS-Le Mans Université, Equipe Méthodologie et Synthèse Organique, F-72085 Le Mans Cedex 09, France
| | - Sandrine Py
- Univ. Grenoble Alpes, DCM, F-38000 Grenoble, France.,CNRS, DCM, F-38000 Grenoble, France
| | - Gilles Dujardin
- Institut des Molécules et Matériaux du Mans (IMMM) - UMR 6283 CNRS-Le Mans Université, Equipe Méthodologie et Synthèse Organique, F-72085 Le Mans Cedex 09, France
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Ligny R, Guillaume SM, Carpentier JF. Yttrium-Mediated Ring-Opening Copolymerization of Oppositely Configurated 4-Alkoxymethylene-β-Propiolactones: Effective Access to Highly Alternated Isotactic Functional PHAs. Chemistry 2019; 25:6412-6424. [PMID: 30779394 DOI: 10.1002/chem.201900413] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/26/2019] [Revised: 02/18/2019] [Indexed: 01/04/2023]
Abstract
The ring-opening copolymerization (ROCOP) of functional 4-alkoxymethylene-β-propiolactones (BPLOR s) by yttrium-bisphenolate complexes was investigated. The ROCOP of equimolar mixtures of BPLOR s of opposite configurations, namely (R)-BPLOR1 /(S)-BPLOR2 [R1 , R2 =OMe, OAllyl, OCH2 Ph (=OBn), OSiMe2 tBu (=OTBDMS)], by the syndioselective Y{ONOOcum }/iPrOH catalyst/initiator system affords P(HBOR1 -alt-HBOR2 ) copolymers with high alternation degrees (altern.=89-94 %), as determined by comprehensive kinetic, 13 C{1 H} NMR spectroscopy, MALDI-ToF MS and ESI MS/MS fragmentation studies. The ROCOP of the (R)-BPLOMe /(S)-BPLOTBDMS combination, featuring a large difference in the substituents' bulkiness, constitutes the only observed exception to this trend (altern.=64 %). On the other hand, the isoselectivity of the Y{ONNOCl }/iPrOH catalyst/initiator system has been exploited to generate, in a one-pot/one-step procedure, original mixtures of isotactic poly(hydroxyalkanoate)s (PHAs). This system efficiently transforms equimolar mixtures of (R)-BPLOAll /(S)-BPLOMe into a 1:1 mixture of the corresponding isotactic iso-(R)-PHBOAll and iso-(S)-PHBOMe homopolymers; almost no copolymerization defects are observed. This new approach has been extended successfully to the ROCOP of equimolar mixtures of racemic monomers, rac-BPLOAll /rac-BPLOMe .
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Affiliation(s)
- Romain Ligny
- Univ. Rennes, CNRS, Institut des Sciences Chimiques de Rennes, UMR 6226, 35042, Rennes, France
| | - Sophie M Guillaume
- Univ. Rennes, CNRS, Institut des Sciences Chimiques de Rennes, UMR 6226, 35042, Rennes, France
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Kerisit N, Ligny R, Gauthier ES, Guégan J, Toupet L, Guillemin J, Trolez Y. Synthesis and Reactivity of 5‐Bromopenta‐2,4‐diynenitrile (BrC 5N): an Access to π‐Conjugated Scaffolds. Helv Chim Acta 2019. [DOI: 10.1002/hlca.201800232] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Nicolas Kerisit
- Univ RennesEcole Nationale Supérieure de Chimie de RennesCNRSISCR – UMR6226 FR-35000 Rennes France
| | - Romain Ligny
- Univ RennesEcole Nationale Supérieure de Chimie de RennesCNRSISCR – UMR6226 FR-35000 Rennes France
| | - Etienne S. Gauthier
- Univ RennesEcole Nationale Supérieure de Chimie de RennesCNRSISCR – UMR6226 FR-35000 Rennes France
| | - Jean‐Paul Guégan
- Univ RennesEcole Nationale Supérieure de Chimie de RennesCNRSISCR – UMR6226 FR-35000 Rennes France
| | - Loïc Toupet
- Univ RennesCNRSIPR – UMR6251 FR-35000 Rennes France
| | - Jean‐Claude Guillemin
- Univ RennesEcole Nationale Supérieure de Chimie de RennesCNRSISCR – UMR6226 FR-35000 Rennes France
| | - Yann Trolez
- Univ RennesEcole Nationale Supérieure de Chimie de RennesCNRSISCR – UMR6226 FR-35000 Rennes France
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Caytan E, Ligny R, Carpentier JF, Guillaume SM. Evaluation of Band-Selective HSQC and HMBC: Methodological Validation on the Cyclosporin Cyclic Peptide and Application for Poly(3-hydroxyalkanoate)s Stereoregularity Determination. Polymers (Basel) 2018; 10:E533. [PMID: 30966567 PMCID: PMC6415406 DOI: 10.3390/polym10050533] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/19/2018] [Revised: 05/09/2018] [Accepted: 05/15/2018] [Indexed: 01/20/2023] Open
Abstract
Band-selective (bs) HSQC, improving spectral resolution by restriction of the heteronuclear dimension without inducing spectral folding, has been recently used for polymer tacticity determination. Herein is reported an evaluation of various bs-HSQC and bs-HMBC sequences, first from a methodological point of view (selectivity, dependence to INEPT interpulse delay or relaxation delay), using the cyclic peptide cyclosporin selected as a model compound, and then from an applicative approach, comparing tacticity determined from bs-HSQC and bs-HMBC experiments to the one obtained from 1D 13C{¹H} on poly(3-hydroxyalkanoate)s samples. For HSQC sequences, the 13C selectivity scheme consisting in substituting a 13C broadband refocalization by a selective one revealed itself problematic, with unwanted aliased signals, whereas the insertion of double pulsed field gradients spin-echo (DPFGSE) or the use of opposite sign gradients bracketing a selective refocalization gave satisfactory results. Determination of the probability of syndiotactic enchainments, Ps, by bs-HSQC is fully consistent and no precision loss was observed when decreasing acquisition time (37 min vs. 106 min for 1D 13C{¹H}). Bs-HMBC, although not straightforwardly applicable for tacticity determination, could provide (after a calibration step) an alternative for compounds of which only 13C carbonyl signals are resolved enough for discriminating between syndiotactic and isotactic configurations.
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Affiliation(s)
- Elsa Caytan
- Univ Rennes, CNRS, Institut des Sciences Chimiques de Rennes-UMR6226, F-35000 Rennes, France.
| | - Romain Ligny
- Univ Rennes, CNRS, Institut des Sciences Chimiques de Rennes-UMR6226, F-35000 Rennes, France.
| | | | - Sophie M Guillaume
- Univ Rennes, CNRS, Institut des Sciences Chimiques de Rennes-UMR6226, F-35000 Rennes, France.
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Ligny R, Hänninen MM, Guillaume SM, Carpentier JF. Steric vs. electronic stereocontrol in syndio- or iso-selective ROP of functional chiral β-lactones mediated by achiral yttrium-bisphenolate complexes. Chem Commun (Camb) 2018; 54:8024-8031. [DOI: 10.1039/c8cc03842b] [Citation(s) in RCA: 51] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
Electronic vs. steric effects of ligand ortho-substituents in (bis)phenolate yttrium-based complexes for preparation of a large scope of stereoregular poly(3-hydroxyalkanoate)s.
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Affiliation(s)
- Romain Ligny
- Univ. Rennes
- CNRS
- Institut des Sciences Chimiques de Rennes
- UMR 6226
- F-35042 Rennes
| | | | - Sophie M. Guillaume
- Univ. Rennes
- CNRS
- Institut des Sciences Chimiques de Rennes
- UMR 6226
- F-35042 Rennes
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Ligny R, Hänninen MM, Guillaume SM, Carpentier JF. Highly Syndiotactic or Isotactic Polyhydroxyalkanoates by Ligand-Controlled Yttrium-Catalyzed Stereoselective Ring-Opening Polymerization of Functional Racemic β-Lactones. Angew Chem Int Ed Engl 2017; 56:10388-10393. [PMID: 28666071 DOI: 10.1002/anie.201704283] [Citation(s) in RCA: 39] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/25/2017] [Revised: 06/06/2017] [Indexed: 01/19/2023]
Abstract
Reported herein is the first stereoselective controlled ROP of a specific family of racemic functional β-lactones, namely 4-alkoxymethylene-β-propiolactones (BPLOR s). This process is catalyzed by an yttrium complex stabilized by a nonchiral tetradentate amino alkoxy bisphenolate ligand {ONOOR'2 }2- , which features both a good activity and a high degree of control over the molar masses of the resulting functional poly(3-hydroxyalkanoate)s. A simple modification of the R' substituents in ortho and para position on the ligand platform allows for a complete reversal from virtually pure syndioselectivity (Ps up to 0.91 with R'=cumyl) to very high isoselectivity (Pi up to 0.93 with R'=Cl), as supported by DFT insights. This is the first example of a highly isoselective ROP of a racemic chiral β-lactone.
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Affiliation(s)
- Romain Ligny
- Institut des Sciences Chimiques de Rennes, UMR 6226 CNRS, Université de Rennes 1, 35042, Rennes, France
| | - Mikko M Hänninen
- Department of Chemistry, University of Jyväskylä, Jyväskylä, P.O. Box 35, 40014, Finland
| | - Sophie M Guillaume
- Institut des Sciences Chimiques de Rennes, UMR 6226 CNRS, Université de Rennes 1, 35042, Rennes, France
| | - Jean-François Carpentier
- Institut des Sciences Chimiques de Rennes, UMR 6226 CNRS, Université de Rennes 1, 35042, Rennes, France
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Ligny R, Hänninen MM, Guillaume SM, Carpentier JF. Highly Syndiotactic or Isotactic Polyhydroxyalkanoates by Ligand-Controlled Yttrium-Catalyzed Stereoselective Ring-Opening Polymerization of Functional Racemic β-Lactones. Angew Chem Int Ed Engl 2017. [DOI: 10.1002/ange.201704283] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Affiliation(s)
- Romain Ligny
- Institut des Sciences Chimiques de Rennes, UMR 6226 CNRS; Université de Rennes 1; 35042 Rennes France
| | - Mikko M. Hänninen
- Department of Chemistry; University of Jyväskylä; Jyväskylä P.O. Box 35 40014 Finland
| | - Sophie M. Guillaume
- Institut des Sciences Chimiques de Rennes, UMR 6226 CNRS; Université de Rennes 1; 35042 Rennes France
| | - Jean-François Carpentier
- Institut des Sciences Chimiques de Rennes, UMR 6226 CNRS; Université de Rennes 1; 35042 Rennes France
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Ligny R, Gauthier ES, Yáñez M, Roisnel T, Guillemin JC, Trolez Y. One-step synthesis of conjugated enynenitriles from bromocyanoacetylene. Org Biomol Chem 2017; 15:6050-6056. [DOI: 10.1039/c6ob02590k] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Bromocyanoacetylene is able to provide conjugated enynenitriles stereoselectively in one step from alkynes, secondary amines and co-catalysts.
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Affiliation(s)
- Romain Ligny
- Ecole Nationale Supérieure de Chimie de Rennes
- UMR 6226
- CNRS
- 35708 Rennes Cedex 7
- France
| | - Etienne S. Gauthier
- Ecole Nationale Supérieure de Chimie de Rennes
- UMR 6226
- CNRS
- 35708 Rennes Cedex 7
- France
| | | | - Thierry Roisnel
- Centre de Diffractométrie X
- Institut des Sciences Chimiques de Rennes
- CNRS (UMR 6226)
- Université de Rennes 1
- 35042 Rennes Cedex
| | - Jean-Claude Guillemin
- Ecole Nationale Supérieure de Chimie de Rennes
- UMR 6226
- CNRS
- 35708 Rennes Cedex 7
- France
| | - Yann Trolez
- Ecole Nationale Supérieure de Chimie de Rennes
- UMR 6226
- CNRS
- 35708 Rennes Cedex 7
- France
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