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Dalvano BE, Wenzel TJ. Sulfated cyclodextrins as water-soluble chiral NMR solvating agents for cationic compounds. ACTA ACUST UNITED AC 2017. [DOI: 10.1016/j.tetasy.2017.07.003] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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Puentes CM, Wenzel TJ. Phosphated cyclodextrins as water-soluble chiral NMR solvating agents for cationic compounds. Beilstein J Org Chem 2017; 13:43-53. [PMID: 28179947 PMCID: PMC5238554 DOI: 10.3762/bjoc.13.6] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2016] [Accepted: 12/22/2016] [Indexed: 11/27/2022] Open
Abstract
The utility of phosphated α-, β- and γ-cyclodextrins as water-soluble chiral NMR solvating agents for cationic substrates is described. Two sets of phosphated cyclodextrins, one with degrees of substitution in the 2–6 range, the other with degrees of substitution in the 6–10 range, are examined. Results with 33 water-soluble cationic substrates are reported. We also explored the possibility that the addition of paramagnetic lanthanide ions such as praseodymium(III) and ytterbium(III) further enhances the enantiomeric differentiation in the NMR spectra. The chiral differentiation with the phosphated cyclodextrins is compared to prior results obtained with anionic carboxymethylated cyclodextrins. There are a number of examples where a larger differentiation is observed with the phosphated cyclodextrins.
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Affiliation(s)
| | - Thomas J Wenzel
- Department of Chemistry, Bates College, Lewiston, Maine 04240 USA
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Dowey AE, Puentes CM, Carey-Hatch M, Sandridge KL, Krishna NB, Wenzel TJ. Synthesis and Utilization of Trialkylammonium-Substituted Cyclodextrins as Water-Soluble Chiral NMR Solvating Agents for Anionic Compounds. Chirality 2016; 28:299-305. [DOI: 10.1002/chir.22582] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/08/2015] [Revised: 01/04/2016] [Accepted: 01/08/2016] [Indexed: 11/10/2022]
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4
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Pal I, Chaudhari SR, Suryaprakash NR. Chiral discrimination of secondary alcohols and carboxylic acids by NMR spectroscopy. MAGNETIC RESONANCE IN CHEMISTRY : MRC 2015; 53:142-146. [PMID: 25332176 DOI: 10.1002/mrc.4167] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/18/2014] [Revised: 09/17/2014] [Accepted: 09/23/2014] [Indexed: 06/04/2023]
Abstract
The manuscript reports two novel ternary ion-pair complexes, which serve as chiral solvating agents, for enantiodiscrimination of secondary alcohols and carboxylic acids. The protocol for discrimination of secondary alcohols is designed by using one equivalent mixture each of enantiopure mandelic acid, 4-dimethylaminopyridine (DMAP) and a chiral alcohol. For discrimination of carboxylic acids, the ternary complex is obtained by one equivalent mixture each of enantiopure chiral alcohol, DMAP and a carboxylic acid. The designed protocols also permit accurate measurement of enantiomeric composition.
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Affiliation(s)
- Indrani Pal
- NMR Research Centre, Solid State and Structural Chemistry Unit, Indian Institute of Science, Bangalore, 560012, India
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Pal I, Chaudhari SR, Suryaprakash N. A versatile ternary ionic complex for chiral discrimination of molecules with diverse functionalities using 1H NMR. NEW J CHEM 2014. [DOI: 10.1039/c4nj00417e] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A novel chiral solvating agent for enantiodiscrimination by NMR spectroscopy is introduced.
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Affiliation(s)
- Indrani Pal
- NMR Research Centre
- Solid State and Structural Chemistry
- Indian Institute of Science
- Bangalore, India
| | - Sachin Rama Chaudhari
- NMR Research Centre
- Solid State and Structural Chemistry
- Indian Institute of Science
- Bangalore, India
| | - Nagarajarao Suryaprakash
- NMR Research Centre
- Solid State and Structural Chemistry
- Indian Institute of Science
- Bangalore, India
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Yang XF, Ning R, Xie LJ, Cui Y, Zhang YL, Zheng LY. Macrocyclic Compound as NMR Chiral Solvating Agent for Determination of Enantiomeric Excess of Carboxylic Acids. BULLETIN OF THE CHEMICAL SOCIETY OF JAPAN 2013. [DOI: 10.1246/bcsj.20130092] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Xiao-feng Yang
- School of Chemistry and Chemical Engineering, University of Jinan
| | - Rui Ning
- School of Chemistry and Chemical Engineering, University of Jinan
| | - Li-jun Xie
- School of Chemistry and Chemical Engineering, University of Jinan
| | - Yu Cui
- School of Chemistry and Chemical Engineering, University of Jinan
| | - Yong-ling Zhang
- School of Chemistry and Chemical Engineering, University of Jinan
| | - Lu-yi Zheng
- School of Chemistry and Chemical Engineering, University of Jinan
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Uccello-Barretta G, Balzano F. Chiral NMR Solvating Additives for Differentiation of Enantiomers. Top Curr Chem (Cham) 2013; 341:69-131. [DOI: 10.1007/128_2013_445] [Citation(s) in RCA: 42] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
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8
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Periasamy M, Dalai M, Padmaja M. Chiral trans-1,2-diaminocyclohexane derivatives as chiral solvating agents for carboxylic acids. J CHEM SCI 2011. [DOI: 10.1007/s12039-010-0090-z] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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Wenzel TJ, Chisholm CD. Using NMR spectroscopic methods to determine enantiomeric purity and assign absolute stereochemistry. PROGRESS IN NUCLEAR MAGNETIC RESONANCE SPECTROSCOPY 2011; 59:1-63. [PMID: 21600355 DOI: 10.1016/j.pnmrs.2010.07.003] [Citation(s) in RCA: 118] [Impact Index Per Article: 9.1] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/15/2010] [Accepted: 07/28/2010] [Indexed: 05/30/2023]
Affiliation(s)
- Thomas J Wenzel
- Department of Chemistry, Bates College, Lewiston, Maine 04240, USA.
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10
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Enantiomeric discrimination of aromatic-containing anionic substrates using cationic cyclodextrins. ACTA ACUST UNITED AC 2011. [DOI: 10.1016/j.tetasy.2010.12.001] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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11
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Chiral bis(amino amides) as chiral solvating agents for enantiomeric excess determination of α-hydroxy and arylpropionic acids. ACTA ACUST UNITED AC 2010. [DOI: 10.1016/j.tetasy.2010.05.010] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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12
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Uccello-Barretta G, Vanni L, Balzano F. Nuclear magnetic resonance approaches to the rationalization of chromatographic enantiorecognition processes. J Chromatogr A 2010; 1217:928-40. [DOI: 10.1016/j.chroma.2009.10.070] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/10/2009] [Revised: 09/30/2009] [Accepted: 10/23/2009] [Indexed: 10/20/2022]
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13
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Synthesis of new chiral imidazolium salts derived from amino acids: their evaluation in chiral molecular recognition. ACTA ACUST UNITED AC 2009. [DOI: 10.1016/j.tetasy.2009.03.028] [Citation(s) in RCA: 37] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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14
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Cycloalkane-1,2-diamine derivatives as chiral solvating agents. Study of the structural variables controlling the NMR enantiodiscrimination of chiral carboxylic acids. Tetrahedron 2008. [DOI: 10.1016/j.tet.2008.06.031] [Citation(s) in RCA: 33] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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15
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Uccello-Barretta G, Balzano F, Pertici F, Jicsinszky L, Sicoli G, Schurig V. External vs. Internal Interactions in the Enantiodiscrimination of Fluorinated α-Amino Acid Derivatives by Heptakis[2,3-di-O-acetyl-6-O-(tert-butyldimethylsilyl)]-β-cyclodextrin, a Powerful Chiral Solvating Agent for NMR Spectroscopy. European J Org Chem 2008. [DOI: 10.1002/ejoc.200701113] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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16
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New pincer-like receptor derived from trans-cyclopentane-1,2-diamine as a chiral shift reagent for carboxylic acids. ACTA ACUST UNITED AC 2007. [DOI: 10.1016/j.tetasy.2007.08.021] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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17
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Uccello-Barretta G, Nazzi S, Balzano F, Levkin PA, Schurig V, Salvadori P. Heptakis[2,3-di-O-methyl-6-O-(L-valine-tert-butylamide-Nα-ylcarbonylmethyl)]-β-cyclodextrin: a New Multifunctional Cyclodextrin CSA for the NMR Enantiodiscrimination of Polar and Apolar Substrates. European J Org Chem 2007. [DOI: 10.1002/ejoc.200700018] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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18
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Sicoli G, Pertici F, Jiang Z, Jicsinszky L, Schurig V. Gas-chromatographic approach to probe the absence of molecular inclusion in enantioseparations by carbohydrates. Investigation of linear dextrins (“acyclodextrins”) as novel chiral stationary phases. Chirality 2007; 19:391-400. [PMID: 17387752 DOI: 10.1002/chir.20383] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
Acetylated/silylated maltooligosaccharides with different degrees of oligomerization have been tested as chiral stationary phases for enantioselective gas chromatography. The acyclic dextrin derivatives carrying tert-butyldimethylsilyl groups at the primary hydroxyl sites and acetyl groups at the secondary hydroxyl sites showed an unexpected ability for the enantioseparation of alpha-amino acid derivatives and halogenated compounds, in addition to some underivatized chiral compounds. Some examples of an improved enantioselectivity invoked by the linear CSPs as compared to that of cyclic oligosaccharides are demonstrated in this work. The results highlight the role of the polar external surface of the selector in lieu of the well-established inclusion mechanism of enantiorecognition by cyclic dextrins. Thus, the enantioseparation of chiral compounds on linear dextrin derivatives--devoid of a molecular cavity--sheds a new light on the mechanisms of enantiorecognition by cyclodextrin derivatives. In contrast to cyclodextrins, linear dextrins are readily accessible in both enantiomeric forms.
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Affiliation(s)
- Giuseppe Sicoli
- Institut für Organische Chemie, Universität Tübingen, Auf der Morgenstelle 18, Tübingen, Germany
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Highly efficient NMR enantiodiscrimination of 1,1,1,3,3-pentafluoro-2-(fluoromethoxy)-3-methoxypropane, a chiral degradation product of sevoflurane, by heptakis(2,3-di-O-acetyl-6-O-tert-butyldimethylsilyl)-β-cyclodextrin. ACTA ACUST UNITED AC 2006. [DOI: 10.1016/j.tetasy.2006.09.019] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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20
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González-Álvarez A, Alfonso I, Gotor V. An azamacrocyclic receptor as efficient polytopic chiral solvating agent for carboxylic acids. Tetrahedron Lett 2006. [DOI: 10.1016/j.tetlet.2006.06.154] [Citation(s) in RCA: 38] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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