1
|
Tichotová M, Landovský T, Lang J, Jeziorowski S, Schmidts V, Kohout M, Babor M, Lhoták P, Thiele CM, Dvořáková H. Enantiodiscrimination of Inherently Chiral Thiacalixarenes by Residual Dipolar Couplings. J Org Chem 2024; 89:9711-9720. [PMID: 36655948 PMCID: PMC11267606 DOI: 10.1021/acs.joc.2c02594] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/27/2022] [Indexed: 01/20/2023]
Abstract
Inherently chiral compounds, such as calixarenes, are chiral due to a nonplanar three-dimensional (3D) structure. Determining their conformation is essential to understand their properties, with nuclear magnetic resonance (NMR) spectroscopy being one applicable method. Using alignment media to measure residual dipolar couplings (RDCs) to obtain structural information is advantageous when classical NMR parameters like the nuclear Overhauser effect (NOE) or J-couplings fail. Besides providing more accurate structural information, the alignment media can induce different orientations of enantiomers. In this study, we examined the ability of polyglutamates with different side-chain moieties─poly-γ-benzyl-l-glutamate (PBLG) and poly-γ-p-biphenylmethyl-l-glutamate (PBPMLG) ─to enantiodifferentiate the inherently chiral phenoxathiin-based thiacalix[4]arenes. Both media, in combination with two solvents, allowed for enantiodiscrimination, which was, to the best of our knowledge, proved for the first time on inherently chiral compounds. Moreover, using the experimental RDCs, we investigated the calix[4]arenes conformational preferences in solution, quantitatively analyzed the differences in the alignment of the enantiomers, and discussed the pitfalls of the use of the RDC analysis.
Collapse
Affiliation(s)
- Markéta Tichotová
- Laboratory
of NMR Spectroscopy, University of Chemistry
and Technology Prague (UCTP), Technická 5, 166 28Prague 6, Czech Republic
- Department
of Physical and Macromolecular Chemistry, Charles University, Hlavova 8, 128 00Prague 2, Czech Republic
- Institute
of Organic Chemistry and Biochemistry, Czech
Academy of Sciences, Flemingovo náměstí 542, 160 00Prague 6, Czech Republic
| | - Tomáš Landovský
- Department
of Organic Chemistry, University of Chemistry
and Technology Prague (UCTP), Technická 5, 166 28Prague 6, Czech Republic
| | - Jan Lang
- Faculty
of Mathematics and Physics, Charles University, Ke Karlovu 3, 121 16Prague 2, Czech Republic
| | - Sharon Jeziorowski
- Department
of Chemistry, Technical University of Darmstadt, Alarich-Weiss-Straße 16, 64287Darmstadt, Germany
| | - Volker Schmidts
- Department
of Chemistry, Technical University of Darmstadt, Alarich-Weiss-Straße 16, 64287Darmstadt, Germany
| | - Michal Kohout
- Department
of Organic Chemistry, University of Chemistry
and Technology Prague (UCTP), Technická 5, 166 28Prague 6, Czech Republic
| | - Martin Babor
- Department
of Solid State Chemistry, University of
Chemistry and Technology Prague (UCTP), Technická 5, 166 28Prague 6, Czech Republic
| | - Pavel Lhoták
- Department
of Organic Chemistry, University of Chemistry
and Technology Prague (UCTP), Technická 5, 166 28Prague 6, Czech Republic
| | - Christina M. Thiele
- Department
of Chemistry, Technical University of Darmstadt, Alarich-Weiss-Straße 16, 64287Darmstadt, Germany
| | - Hana Dvořáková
- Laboratory
of NMR Spectroscopy, University of Chemistry
and Technology Prague (UCTP), Technická 5, 166 28Prague 6, Czech Republic
| |
Collapse
|
2
|
Lhoták P. Upper rim-bridged calixarenes. RSC Adv 2024; 14:23303-23321. [PMID: 39049889 PMCID: PMC11267508 DOI: 10.1039/d4ra04663c] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/26/2024] [Accepted: 07/18/2024] [Indexed: 07/27/2024] Open
Abstract
Calix[n]arenes represent a very attractive family of macrocyclic compounds with many potential supramolecular applications. Due to their well-established chemistry and many different synthetic strategies, enabling practically any derivatization of the basic skeleton, calixarenes are among the very popular building blocks used for the design and construction of various receptors, sensors and other sophisticated supramolecular systems. Regio- and/or stereo-selective derivatization of calixarenes currently represents a very extensive set of reactions, the overview of which would fill many thick books. Therefore, this review deals with only a small part of the above-mentioned reactions, specifically describes possible ways of bridging the upper rim of calixarenes, often leading to interesting rigidified structures, and also briefly mentions the potential use of these compounds.
Collapse
Affiliation(s)
- Pavel Lhoták
- Department of Organic Chemistry, University of Chemistry and Technology, Prague (UCTP) Technická 5 166 28 Prague 6 Czech Republic
| |
Collapse
|
3
|
Zhang X, Tong S, Zhu J, Wang MX. Inherently chiral calixarenes by a catalytic enantioselective desymmetrizing cross-dehydrogenative coupling. Chem Sci 2023; 14:827-832. [PMID: 36755707 PMCID: PMC9890570 DOI: 10.1039/d2sc06234h] [Citation(s) in RCA: 7] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/11/2022] [Accepted: 12/05/2022] [Indexed: 12/12/2022] Open
Abstract
Under the catalysis of PdBr2 and a chiral phosphoramidite ligand, the upper-rim mono (2-bromoaroyl)-substituted calix[4]arene derivatives underwent a facile enantioselective desymmetrization reaction to afford 9H-fluorene-embedded inherently chiral calixarenes in good yields with excellent enantioselectivities. The transannular dehydrogenative arene-arene coupling reaction proceeded most probably through an oxidative addition of the Caryl-Br bond to a ligated palladium catalyst followed by a sequence of an enantioselective 1,5-palladium migration and an intramolecular C-H arylation sequence. This new family of inherently chiral calixarenes possesses unique chiroptical properties thanks to their highly rigid structure induced by the 9H-fluorene segment.
Collapse
Affiliation(s)
- Xin Zhang
- Key Laboratory of Bioorganic Phosphorus Chemistry and Chemical Biology (Ministry of Education), Department of Chemistry, Tsinghua University Beijing 100084 China http://mascl.group
| | - Shuo Tong
- Key Laboratory of Bioorganic Phosphorus Chemistry and Chemical Biology (Ministry of Education), Department of Chemistry, Tsinghua University Beijing 100084 China http://mascl.group
| | - Jieping Zhu
- Laboratory of Synthesis and Natural Products (LSPN), Institute of Chemical Sciences and Engineering, Ecole Polytechnique Fédérale de Lausanne, EPFL-SB-ISIC-LSPNBCH5304CH-1015 LausanneSwitzerland
| | - Mei-Xiang Wang
- Key Laboratory of Bioorganic Phosphorus Chemistry and Chemical Biology (Ministry of Education), Department of Chemistry, Tsinghua University Beijing 100084 China http://mascl.group
| |
Collapse
|
4
|
Zhang YZ, Xu MM, Si XG, Hou JL, Cai Q. Enantioselective Synthesis of Inherently Chiral Calix[4]arenes via Palladium-Catalyzed Asymmetric Intramolecular C–H Arylations. J Am Chem Soc 2022; 144:22858-22864. [DOI: 10.1021/jacs.2c10606] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Affiliation(s)
- Yu-Zhen Zhang
- Department of Chemistry, Fudan University, 220 Handan Road, Shanghai 200433, China
| | - Meng-Meng Xu
- Department of Chemistry, Fudan University, 220 Handan Road, Shanghai 200433, China
| | - Xu-Ge Si
- Department of Chemistry, Fudan University, 220 Handan Road, Shanghai 200433, China
| | - Jun-Li Hou
- Department of Chemistry, Fudan University, 220 Handan Road, Shanghai 200433, China
| | - Quan Cai
- Department of Chemistry, Fudan University, 220 Handan Road, Shanghai 200433, China
| |
Collapse
|
5
|
Hodson L, Visagie KJ, Smith MP, Loots L, Kuter D, Snayer TM, Arnott GE. Facile synthesis of a C4-symmetrical inherently chiral calix[4]arene. Chem Commun (Camb) 2021; 57:11045-11048. [PMID: 34617530 DOI: 10.1039/d1cc04607a] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Inherently chiral calix[4]arenes with C4-symmetry are extremely rare and difficult to synthesise, severely hampering any effort to expand on their potential as chiral supramolecular catalysts and building blocks. Herein we report a reaction of a tetracarbamate calix[4]arene with NBS which results in a high yield of an inherently chiral calix[4]arenes with C4-symmetry. Furthermore, employing a chiral N-Boc proline moiety allows for separation of the diastereomers formed, thus obtaining the pure enantiomers after hydrolysis. The enantiomers could be assigned based on the CD spectra and DFT calculated values.
Collapse
Affiliation(s)
- Luke Hodson
- Department of Chemistry and Polymer Science, Stellenbosch University, Private Bag X1, Matieland, 7602, South Africa.
| | - Kevin J Visagie
- Department of Chemistry and Polymer Science, Stellenbosch University, Private Bag X1, Matieland, 7602, South Africa.
| | - Michael-Phillip Smith
- Department of Chemistry and Polymer Science, Stellenbosch University, Private Bag X1, Matieland, 7602, South Africa.
| | - Leigh Loots
- Department of Chemistry and Polymer Science, Stellenbosch University, Private Bag X1, Matieland, 7602, South Africa.
| | - David Kuter
- Department of Chemistry and Polymer Science, Stellenbosch University, Private Bag X1, Matieland, 7602, South Africa.
| | - Trégen M Snayer
- Department of Chemistry and Polymer Science, Stellenbosch University, Private Bag X1, Matieland, 7602, South Africa.
| | - Gareth E Arnott
- Department of Chemistry and Polymer Science, Stellenbosch University, Private Bag X1, Matieland, 7602, South Africa.
| |
Collapse
|
6
|
Jurisch CD, Arnott GE. Attempted synthesis of a meta-metalated calix[4]arene. Beilstein J Org Chem 2019; 15:1996-2002. [PMID: 31501666 PMCID: PMC6719732 DOI: 10.3762/bjoc.15.195] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/25/2019] [Accepted: 08/12/2019] [Indexed: 11/23/2022] Open
Abstract
An evidence for the formation of a rare meta-metalated inherently chiral calix[4]arene is described. Our strategy involved using a mesoionic carbene to direct C–H activation, but proved to form an unexpectedly unstable intermediate that was identified through high-resolution mass spectrometry. On route to our target, a new optimized method to mononitrocalix[4]arenes was developed, including optimized and high yielding transformations to azide and 1,2,3-triazole derivatives which may have application in other areas of research.
Collapse
Affiliation(s)
- Christopher D Jurisch
- Department of Chemistry and Polymer Science, Stellenbosch University, Private Bag X1, Matieland, 7602, South Africa
| | - Gareth E Arnott
- Department of Chemistry and Polymer Science, Stellenbosch University, Private Bag X1, Matieland, 7602, South Africa
| |
Collapse
|
7
|
Slavík P, Krupička M, Eigner V, Vrzal L, Dvořáková H, Lhoták P. Rearrangement of meta-Bridged Calix[4]arenes Promoted by Internal Strain. J Org Chem 2019; 84:4229-4235. [PMID: 30868881 DOI: 10.1021/acs.joc.9b00107] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
The meta-bridged calixarenes possess a rigidified and highly distorted cavity, where the additional single-bond bridge imposes an extreme internal strain on the whole system. As a consequence, these compounds exhibit a reasonably amended reactivity, compared with common calix[4]arene derivatives, which is governed by the release of internal strain. This can be documented by the reaction of the bridged calix[4]arene with P2O5 or Nafion-H, leading (apart from polymers) to a macrocyclic product with a rearranged basic skeleton. The methylene bridge next to the fluorene moiety is intramolecularly shifted from position 2 to position 4 of the phenolic subunit to minimize the tension. As revealed by single-crystal X-ray analysis and by application of the residual dipolar coupling method, the rearrangement occurs without altering the original conformation.
Collapse
Affiliation(s)
- Petr Slavík
- Department of Organic Chemistry , University of Chemistry and Technology, Prague (UCTP) , Technická 5 , 166 28 Prague 6 , Czech Republic
| | - Martin Krupička
- Department of Organic Chemistry , University of Chemistry and Technology, Prague (UCTP) , Technická 5 , 166 28 Prague 6 , Czech Republic
| | - Václav Eigner
- Laboratory of Nuclear Magnetic Resonance (NMR) Spectroscopy , UCTP , 166 28 Prague 6 , Czech Republic
| | - Lukáš Vrzal
- Institute of Physics AS CR, v.v.i. , Na Slovance 2 , 182 21 Prague 8 , Czech Republic
| | - Hana Dvořáková
- Institute of Physics AS CR, v.v.i. , Na Slovance 2 , 182 21 Prague 8 , Czech Republic
| | - Pavel Lhoták
- Department of Organic Chemistry , University of Chemistry and Technology, Prague (UCTP) , Technická 5 , 166 28 Prague 6 , Czech Republic
| |
Collapse
|
8
|
Landovský T, Tichotová M, Vrzal L, Budka J, Eigner V, Dvořáková H, Lhoták P. Structure elucidation of phenoxathiin-based thiacalix[4]arene conformations using NOE and RDC data. Tetrahedron 2018. [DOI: 10.1016/j.tet.2018.01.020] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
|
9
|
Arnott GE. Inherently Chiral Calixarenes: Synthesis and Applications. Chemistry 2017; 24:1744-1754. [DOI: 10.1002/chem.201703367] [Citation(s) in RCA: 43] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/20/2017] [Indexed: 11/12/2022]
Affiliation(s)
- Gareth E. Arnott
- Department of Chemistry and Polymer Science; Stellenbosch University; Private Bag X1 Matieland South Africa
| |
Collapse
|
10
|
Castell DC, Lesotho N, Nikolayenko VI, Arnott GE. Inherently Chiral Calix[4]arenes: A Chiral Sulfoxide as an Ortholithiation Director. European J Org Chem 2017. [DOI: 10.1002/ejoc.201700701] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Dominic C. Castell
- Department of Chemistry and Polymer Science; Stellenbosch University; Private Bag X1, Matieland 7602 Stellenbosch South Africa
| | - Ntlama Lesotho
- Department of Chemistry and Polymer Science; Stellenbosch University; Private Bag X1, Matieland 7602 Stellenbosch South Africa
| | - Varvara I. Nikolayenko
- Department of Chemistry and Polymer Science; Stellenbosch University; Private Bag X1, Matieland 7602 Stellenbosch South Africa
| | - Gareth E. Arnott
- Department of Chemistry and Polymer Science; Stellenbosch University; Private Bag X1, Matieland 7602 Stellenbosch South Africa
| |
Collapse
|
11
|
Slavík P, Dvořáková H, Eigner V, Lhoták P. meta-Bridged calix[4]arenes prepared by Friedel–Crafts alkylation. NEW J CHEM 2017. [DOI: 10.1039/c7nj03394j] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
meta-Mercuration allowed the introduction of substituted hydroxymethyl groups that were intramolecularly cyclized to form a novel type of bridged calix[4]arenes.
Collapse
Affiliation(s)
- P. Slavík
- Department of Organic Chemistry
- University of Chemistry and Technology
- Prague (UCTP)
- 166 28 Prague 6
- Czech Republic
| | - H. Dvořáková
- Laboratory of NMR Spectroscopy
- UCTP
- 166 28 Prague 6
- Czech Republic
| | - V. Eigner
- Institute of Physics AS CR v.v.i
- 182 21 Prague 8
- Czech Republic
| | - P. Lhoták
- Department of Organic Chemistry
- University of Chemistry and Technology
- Prague (UCTP)
- 166 28 Prague 6
- Czech Republic
| |
Collapse
|
12
|
Ozyilmaz E, Sayin S. Utilization of Catalytic Properties of the Encapsulated Lipase with Calix[4]arene-Adorned Sporopollenin. Polycycl Aromat Compd 2016. [DOI: 10.1080/10406638.2016.1200638] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
Affiliation(s)
- Elif Ozyilmaz
- Department of Biochemistry, Selcuk University, Konya, Turkey
| | - Serkan Sayin
- Department of Environmental Engineering, Faculty of Engineering, Giresun University, Giresun, Turkey
| |
Collapse
|
13
|
Synthesis and investigation of catalytic affinities of water-soluble amphiphilic calix[n]arene surfactants in the coupling reaction of some heteroaromatic compounds. Tetrahedron 2016. [DOI: 10.1016/j.tet.2016.08.066] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
|
14
|
Pulis AP, Procter DJ. C-H Coupling Reactions Directed by Sulfoxides: Teaching an Old Functional Group New Tricks. Angew Chem Int Ed Engl 2016; 55:9842-60. [PMID: 27409984 DOI: 10.1002/anie.201601540] [Citation(s) in RCA: 190] [Impact Index Per Article: 23.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/12/2016] [Indexed: 01/16/2023]
Abstract
Sulfoxides are classical functional groups for directing the stoichiometric metalation and functionalization of C-H bonds. In recent times, sulfoxides have been given a new lease on life owing to the development of modern synthetic methods that have arisen because of their unique reactivity. They have recently been used in catalytic C-H activation proceeding via coordination of an internal sulfoxide to a metal or through the action of an external sulfoxide ligand. Furthermore, sulfoxides are able to capture nucleophiles and electrophiles to give sulfonium salts, which subsequently enable the formation of C-C bonds at the expense of C-H bonds. This Review summarizes a renaissance period in the application of sulfoxides arising from their versatility in directing C-H functionalization.
Collapse
Affiliation(s)
- Alexander P Pulis
- School of Chemistry, University of Manchester, Oxford Road, Manchester, M13 9PL, UK.
| | - David J Procter
- School of Chemistry, University of Manchester, Oxford Road, Manchester, M13 9PL, UK.
| |
Collapse
|
15
|
Pulis AP, Procter DJ. Sulfoxid-gelenkte C-H-Kupplungsreaktionen: Eine alte funktionelle Gruppe lernt neue Tricks. Angew Chem Int Ed Engl 2016. [DOI: 10.1002/ange.201601540] [Citation(s) in RCA: 70] [Impact Index Per Article: 8.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Affiliation(s)
- Alexander P. Pulis
- School of Chemistry; University of Manchester; Oxford Road Manchester M13 9PL UK
| | - David J. Procter
- School of Chemistry; University of Manchester; Oxford Road Manchester M13 9PL UK
| |
Collapse
|
16
|
|
17
|
Lavendomme R, Zahim S, De Leener G, Inthasot A, Mattiuzzi A, Luhmer M, Reinaud O, Jabin I. Rational Strategies for the Selective Functionalization of Calixarenes. ASIAN J ORG CHEM 2015. [DOI: 10.1002/ajoc.201500178] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Roy Lavendomme
- Laboratoire de Chimie Organique; Université libre de Bruxelles (ULB); Avenue F.D. Roosevelt 50, CP160/06 1050 Brussels Belgium
- Laboratoire de Résonance Magnétique Nucléaire Haute Résolution; Université libre de Bruxelles (ULB); Avenue F.D. Roosevelt 50, CP160/08 1050 Brussels Belgium
| | - Sara Zahim
- Laboratoire de Chimie Organique; Université libre de Bruxelles (ULB); Avenue F.D. Roosevelt 50, CP160/06 1050 Brussels Belgium
| | - Gaël De Leener
- Laboratoire de Chimie Organique; Université libre de Bruxelles (ULB); Avenue F.D. Roosevelt 50, CP160/06 1050 Brussels Belgium
- Laboratoire de Chimie et de Biochimie Pharmacologiques et Toxicologiques; Université Paris Descartes, Sorbonne Paris Cité, CNRS UMR 8601; 45 rue des Saints Pères 75006 Paris France
| | - Alex Inthasot
- Laboratoire de Chimie Organique; Université libre de Bruxelles (ULB); Avenue F.D. Roosevelt 50, CP160/06 1050 Brussels Belgium
- Laboratoire de Résonance Magnétique Nucléaire Haute Résolution; Université libre de Bruxelles (ULB); Avenue F.D. Roosevelt 50, CP160/08 1050 Brussels Belgium
- Laboratoire de Chimie et de Biochimie Pharmacologiques et Toxicologiques; Université Paris Descartes, Sorbonne Paris Cité, CNRS UMR 8601; 45 rue des Saints Pères 75006 Paris France
| | - Alice Mattiuzzi
- Laboratoire de Chimie Organique; Université libre de Bruxelles (ULB); Avenue F.D. Roosevelt 50, CP160/06 1050 Brussels Belgium
| | - Michel Luhmer
- Laboratoire de Résonance Magnétique Nucléaire Haute Résolution; Université libre de Bruxelles (ULB); Avenue F.D. Roosevelt 50, CP160/08 1050 Brussels Belgium
| | - Olivia Reinaud
- Laboratoire de Chimie et de Biochimie Pharmacologiques et Toxicologiques; Université Paris Descartes, Sorbonne Paris Cité, CNRS UMR 8601; 45 rue des Saints Pères 75006 Paris France
| | - Ivan Jabin
- Laboratoire de Chimie Organique; Université libre de Bruxelles (ULB); Avenue F.D. Roosevelt 50, CP160/06 1050 Brussels Belgium
| |
Collapse
|
18
|
Li-Yuan Bao R, Zhao R, Shi L. Progress and developments in the turbo Grignard reagent i-PrMgCl·LiCl: a ten-year journey. Chem Commun (Camb) 2015; 51:6884-900. [DOI: 10.1039/c4cc10194d] [Citation(s) in RCA: 104] [Impact Index Per Article: 11.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
The structural and kinetic perspectives of i-PrMgCl·LiCl help to rationalize the trends of its unique reactivity and selectivity.
Collapse
Affiliation(s)
- Robert Li-Yuan Bao
- Institute of Organic Chemistry
- The Academy of Fundamental and Interdisciplinary Science
- Harbin Institute of Technology
- Harbin 150080
- P. R. China
| | - Rong Zhao
- Institute of Organic Chemistry
- The Academy of Fundamental and Interdisciplinary Science
- Harbin Institute of Technology
- Harbin 150080
- P. R. China
| | - Lei Shi
- Institute of Organic Chemistry
- The Academy of Fundamental and Interdisciplinary Science
- Harbin Institute of Technology
- Harbin 150080
- P. R. China
| |
Collapse
|
19
|
Vrzal L, Kratochvílová-Šimánová M, Landovský T, Polívková K, Budka J, Dvořáková H, Lhoták P. Application of RDC enhanced NMR spectroscopy in structural analysis of thiacalix[4]arene derivatives. Org Biomol Chem 2015; 13:9610-8. [DOI: 10.1039/c5ob01424g] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
Abstract
The conformational behaviour of novel phenoxathiin-based skeletons was studied using the Residual Dipolar Coupling constant (RDC) method.
Collapse
Affiliation(s)
- L. Vrzal
- Laboratory of NMR Spectroscopy
- University of Chemistry and Technology
- 166 28 Prague 6
- Czech Republic
| | | | - T. Landovský
- Department of Organic Chemistry
- University of Chemistry and Technology
- 166 28 Prague 6
- Czech Republic
| | - K. Polívková
- Department of Organic Chemistry
- University of Chemistry and Technology
- 166 28 Prague 6
- Czech Republic
| | - J. Budka
- Department of Organic Chemistry
- University of Chemistry and Technology
- 166 28 Prague 6
- Czech Republic
| | - H. Dvořáková
- Laboratory of NMR Spectroscopy
- University of Chemistry and Technology
- 166 28 Prague 6
- Czech Republic
| | - P. Lhoták
- Department of Organic Chemistry
- University of Chemistry and Technology
- 166 28 Prague 6
- Czech Republic
| |
Collapse
|
20
|
Sayin S, Ozbek C, Okur S, Yilmaz M. Preparation of the ferrocene-substituted 1,3-distal p-tert-butylcalix[4]arene based QCM sensors array and utilization of its gas-sensing affinities. J Organomet Chem 2014. [DOI: 10.1016/j.jorganchem.2014.06.004] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
|
21
|
Slavík P, Dvořáková H, Eigner V, Lhoták P. Regioselective alkylation of a methylene group via meta-bridging of calix[4]arenes. Chem Commun (Camb) 2014; 50:10112-4. [PMID: 25050988 DOI: 10.1039/c4cc04356a] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The meta-iodo derivative, fixed in the cone conformation, enables the gram-scale preparation of a meta-bridged calix[4]arene. This intermediate, possessing a fluorene moiety within the macrocyclic skeleton, can be regioselectively alkylated on the corresponding methylene bridge to form a unique substitution pattern in classical calixarene chemistry.
Collapse
Affiliation(s)
- Petr Slavík
- Department of Organic Chemistry, Institute of Chemical Technology Prague (ICTP), Technicka 5, 166 28, Prague 6, Czech Republic.
| | | | | | | |
Collapse
|
22
|
Sayin S, Yilmaz M. Brønsted acidic magnetic nano-Fe3O4-adorned calix[n]arene sulfonic acids: synthesis and application in the nucleophilic substitution of alcohols. Tetrahedron 2014. [DOI: 10.1016/j.tet.2014.06.034] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
|
23
|
Vrzal L, Flídrová K, Tobrman T, Dvořáková H, Lhoták P. Use of residual dipolar couplings in conformational analysis of meta-disubstituted calix[4]arenes. Chem Commun (Camb) 2014; 50:7590-2. [PMID: 24820209 DOI: 10.1039/c4cc02274b] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Dimercuration of tetrapropoxy calix[4]arene followed by a reaction with isoamyl nitrite afforded dinitroso regioisomers with unique substitution patterns. The unusual conformational behaviour of these inherently chiral systems was revealed by the combination of dynamic NMR and residual dipolar coupling (RDC) techniques.
Collapse
Affiliation(s)
- Lukáš Vrzal
- Laboratory of NMR Spectroscopy, Institute of Chemical Technology Prague (ICTP), Technická 5, 166 28, Prague 6, Czech Republic.
| | | | | | | | | |
Collapse
|
24
|
Flídrová K, Slavík P, Eigner V, Dvořáková H, Lhoták P. meta-Bridged calix[4]arenes: a straightforward synthesis via organomercurial chemistry. Chem Commun (Camb) 2013; 49:6749-51. [DOI: 10.1039/c3cc43284j] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
|