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Haslak ZP, Agopcan Cinar S, Sarigul Ozbek S, Monard G, Dogan I, Aviyente V. Elucidation of the atroposelectivity in the synthesis of axially chiral thiohydantoin derivatives. Org Biomol Chem 2020; 18:2233-2241. [PMID: 32022073 DOI: 10.1039/c9ob02556a] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Recently, Sarigul and Dogan have synthesized a number of enantiomerically enriched axially chiral atropoisomeric 2-thiohydantoins by the reaction of l-amino acid ester salts and o-aryl isothiocyanates in the presence of triethyl amine (TEA) in dichloromethane. The non-axially chiral derivative 5-methyl-3-phenyl-2-thiohydantoin gave a racemic product whereas the axially chiral 5-methyl-3-o-bromophenyl-2-thiohydantoin was less prone to racemize at C5 of the heterocyclic ring. In this study, we present a computational study (M06-2X/6-311+G(d,p) for C, H, O, N and S; M06-2X/6-311++G(3df,3pd) for Br) in order to propose plausible mechanisms for the racemization and cyclization steps for 2-thiohydantoin derivatives. The study includes rationalization based on steric as well as the electrostatic effects to elucidate the epimerization differences at C5.
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Affiliation(s)
- Zeynep Pinar Haslak
- Department of Chemistry, Bogaziçi University, Bebek, Istanbul, 34342, Turkey. and Université de Lorraine, CNRS, LPCT, F-54000 Nancy, France and Faculty of Science and Letters, Piri Reis University, Tuzla, Istanbul, 34940, Turkey
| | - Sesil Agopcan Cinar
- Department of Chemistry, Bogaziçi University, Bebek, Istanbul, 34342, Turkey.
| | - Sevgi Sarigul Ozbek
- Faculty of Pharmacy, Acibadem Mehmet Ali Aydinlar University, Atasehir, Istanbul, 34752, Turkey
| | - Gérald Monard
- Université de Lorraine, CNRS, LPCT, F-54000 Nancy, France
| | - Ilknur Dogan
- Department of Chemistry, Bogaziçi University, Bebek, Istanbul, 34342, Turkey.
| | - Viktorya Aviyente
- Department of Chemistry, Bogaziçi University, Bebek, Istanbul, 34342, Turkey.
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Hsiao CM, Chen YF, Lin CH, Hu CH, Cai YR, Huang JH. Catalytic amination of benzyl alcohol using ruthenium cymene compounds containing bidentate N,O-donor ancillary ligands. J Organomet Chem 2018. [DOI: 10.1016/j.jorganchem.2018.02.029] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
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3
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Rushton GT, Vik EC, Burns WG, Rasberry RD, Shimizu KD. Guest control of a hydrogen bond-catalysed molecular rotor. Chem Commun (Camb) 2018; 53:12469-12472. [PMID: 29105705 DOI: 10.1039/c7cc07672j] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
Abstract
Herein, the control of a molecular rotor using hydrogen bonding guests is demonstrated. With a properly positioned phenol substituent, the N-arylimide rotors can form an intramolecular hydrogen bond that catalyses the rotational isomerization process. The addition of the guests disrupts the hydrogen bond and raises the rotational barrier, slowing the rotation by two orders of magnitude.
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Affiliation(s)
- Gregory T Rushton
- Department of Chemistry and Biochemistry, University of South Carolina, Columbia, SC 29208, USA.
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Belot V, Farran D, Jean M, Albalat M, Vanthuyne N, Roussel C. Steric Scale of Common Substituents from Rotational Barriers of N-(o-Substituted aryl)thiazoline-2-thione Atropisomers. J Org Chem 2017; 82:10188-10200. [DOI: 10.1021/acs.joc.7b01698] [Citation(s) in RCA: 39] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Vincent Belot
- Aix Marseille Univ, CNRS, Centrale Marseille,
iSm2, Marseille, France
| | - Daniel Farran
- Aix Marseille Univ, CNRS, Centrale Marseille,
iSm2, Marseille, France
| | - Marion Jean
- Aix Marseille Univ, CNRS, Centrale Marseille,
iSm2, Marseille, France
| | - Muriel Albalat
- Aix Marseille Univ, CNRS, Centrale Marseille,
iSm2, Marseille, France
| | - Nicolas Vanthuyne
- Aix Marseille Univ, CNRS, Centrale Marseille,
iSm2, Marseille, France
| | - Christian Roussel
- Aix Marseille Univ, CNRS, Centrale Marseille,
iSm2, Marseille, France
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Al-Sehemi AG, Al-Amri RSA, Irfan A. Synthesis, characterization and density functional theory investigations of the N,N-diacylaniline derivatives. ARAB J CHEM 2017. [DOI: 10.1016/j.arabjc.2013.07.011] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022] Open
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Yildirim A, Konuklar FAS, Catak S, Van Speybroeck V, Waroquier M, Dogan I, Aviyente V. Solvent-catalyzed ring-chain-ring tautomerization in axially chiral compounds. Chemistry 2012; 18:12725-32. [PMID: 22976311 DOI: 10.1002/chem.201200363] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/02/2012] [Revised: 06/11/2012] [Indexed: 11/05/2022]
Abstract
The mechanism of ring-chain-ring tautomerization and the prominent effect of the solvent environment have been computationally investigated in an effort to explain the enantiomeric interconversion observed in 2-oxazolidinone derivatives, heterocyclic analogues of biphenyl atropisomers, which were isolated as single stable enantiomers and have the potential to be used as axially chiral catalysts. This study has shed light on the identity of the intermediate species involved in the ring-chain-ring tautomerization process as well as the catalytic effect of polar protic solvents. These mechanistic details will prove very useful in predicting and understanding ring-chain tautomeric equilibria in similar heterocyclic systems and will further enable experimentalists to devise appropriate experimental conditions in which axially chiral catalysts remain stable as single enantiomers.
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Affiliation(s)
- Asli Yildirim
- Department of Chemistry, Boğaziçi University, Bebek, Istanbul, Turkey
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Schwarzer A, Böhme U, Kroke E. Use of Melem as a Nucleophilic Reagent to Form the Triphthalimide C6N7(phthal)3-New Targets and Prospects. Chemistry 2012; 18:12052-8. [DOI: 10.1002/chem.201200723] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/04/2012] [Revised: 06/01/2012] [Indexed: 11/09/2022]
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Yılmaz EM, Doğan İ. Axially chiral N-(o-aryl)-2-thioxo-oxazolidine-4-one and rhodanine derivatives: enantiomeric separation and determination of racemization barriers. ACTA ACUST UNITED AC 2008. [DOI: 10.1016/j.tetasy.2008.09.001] [Citation(s) in RCA: 28] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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9
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Erol S, Dogan I. Axially Chiral 2-Arylimino-3-aryl-thiazolidine-4-one Derivatives: Enantiomeric Separation and Determination of Racemization Barriers by Chiral HPLC. J Org Chem 2007; 72:2494-500. [PMID: 17343419 DOI: 10.1021/jo0625554] [Citation(s) in RCA: 36] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Axially chiral 2-arylimino-3-aryl-thiazolidine-4-ones have been synthesized as racemic mixtures, and each mixture with the exception of 2-(o-chlorophenyl)imino-3-(o-chlorophenyl)-thiazolidine-4-one has been converted to the corresponding 5-benzylidene-2-arylimino-3-aryl-thiazolidine-4-one racemates by reaction with benzaldehyde. The thermally interconvertible enantiomers of each compound have been obtained by enantioselective HPLC separation on columns Chiralpak AD-H and Chiralcel OD-H, and the barriers to racemization have been found to be 98.1-114.1 kJ/mol. The barriers determined were compared to those of structurally related compounds to provide evidence for the stereochemistry of the aryl imino bond.
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Affiliation(s)
- Sule Erol
- Chemistry Department, Bogaziçi University, Bebek 34342, Istanbul, Turkey
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Marten J, Seichter W, Weber E, Böhme U. Synthesis and structural study of 2′- and 2′,6′-positioned methyl- and nitro-substituted 3-(arylhydrazono)pentane-2,4-diones. J PHYS ORG CHEM 2007. [DOI: 10.1002/poc.1225] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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