1
|
Liu D, Fan Y, Liu M, Ge Q, Gao R, Cong H. Cucurbit[7]uril-Catalyzed Beckmann Rearrangement of Arylketoximes. Org Lett 2024; 26:3896-3900. [PMID: 38666729 DOI: 10.1021/acs.orglett.4c01061] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/12/2024]
Abstract
With the existence of cucurbit[7]uril (Q[7]), a supramolecular catalysis strategy for the Beckmann rearrangement of aryl ketoximes to N-substituted amides was successfully established. The cavity of Q[7] was found to be essential for substrate encapsulation and the rearrangement reaction through comparative experiments and studies on host-guest interactions. This supramolecular strategy provides an efficient route for the rearrangement reaction incorporating a carbonation intermediate.
Collapse
Affiliation(s)
- Dechao Liu
- Enterprise Technology Center of Guizhou Province, Guizhou University, Guiyang 550025, People's Republic of China
| | - Ying Fan
- Enterprise Technology Center of Guizhou Province, Guizhou University, Guiyang 550025, People's Republic of China
- Collaborative Innovation Center of Guizhou Province for Efficient Utilization of Phosphorus and Fluorine Resources, Guizhou University, Guiyang 550025, People's Republic of China
| | - Mao Liu
- Enterprise Technology Center of Guizhou Province, Guizhou University, Guiyang 550025, People's Republic of China
- Collaborative Innovation Center of Guizhou Province for Efficient Utilization of Phosphorus and Fluorine Resources, Guizhou University, Guiyang 550025, People's Republic of China
- Engineering Research Center for Energy Conversion and Storage Technology of Guizhou, School of Chemistry and Chemical Engineering, Guizhou University, Guiyang 550025, People's Republic of China
| | - Qingmei Ge
- Enterprise Technology Center of Guizhou Province, Guizhou University, Guiyang 550025, People's Republic of China
- Collaborative Innovation Center of Guizhou Province for Efficient Utilization of Phosphorus and Fluorine Resources, Guizhou University, Guiyang 550025, People's Republic of China
- Engineering Research Center for Energy Conversion and Storage Technology of Guizhou, School of Chemistry and Chemical Engineering, Guizhou University, Guiyang 550025, People's Republic of China
| | - Ruihan Gao
- Enterprise Technology Center of Guizhou Province, Guizhou University, Guiyang 550025, People's Republic of China
- Collaborative Innovation Center of Guizhou Province for Efficient Utilization of Phosphorus and Fluorine Resources, Guizhou University, Guiyang 550025, People's Republic of China
| | - Hang Cong
- Enterprise Technology Center of Guizhou Province, Guizhou University, Guiyang 550025, People's Republic of China
- Collaborative Innovation Center of Guizhou Province for Efficient Utilization of Phosphorus and Fluorine Resources, Guizhou University, Guiyang 550025, People's Republic of China
- Engineering Research Center for Energy Conversion and Storage Technology of Guizhou, School of Chemistry and Chemical Engineering, Guizhou University, Guiyang 550025, People's Republic of China
| |
Collapse
|
2
|
Geue N. Emerging scientists in analytical sciences: Niklas Geue. ANALYTICAL SCIENCE ADVANCES 2024; 5:2300049. [PMID: 38828083 PMCID: PMC11142393 DOI: 10.1002/ansa.202300049] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 09/21/2023] [Accepted: 10/02/2023] [Indexed: 06/05/2024]
Affiliation(s)
- Niklas Geue
- Michael Barber Centre for Collaborative Mass Spectrometry, Manchester Institute of Biotechnology, Department of ChemistryThe University of ManchesterManchesterUK
| |
Collapse
|
3
|
Zhu WS, Sun D, Yu LL, Zhi SQ, Shan YD, Lu YF, Ren HT, Wu SH, Liu Y, Han X. Selective Photooxidation of Benzyl Alcohol to Benzaldehyde via H-Abstraction by Bi 2.15WO 6 under Alkaline Conditions. Ind Eng Chem Res 2022. [DOI: 10.1021/acs.iecr.2c03361] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Affiliation(s)
- Wen-Shuang Zhu
- Key Laboratory of Indoor Air Environment Quality Control, School of Environmental Science and Engineering, Tianjin University, Tianjin300350, P. R. China
| | - Dai Sun
- Key Laboratory of Indoor Air Environment Quality Control, School of Environmental Science and Engineering, Tianjin University, Tianjin300350, P. R. China
| | - Ling-Li Yu
- State Key Laboratory of Drug Delivery Technology and Pharmacokinetics, Tianjin Institute of Pharmaceutical Research, Tianjin300301, P. R. China
- Tianjin Taipu Pharmaceutical Co., Ltd., Tianjin300462, P. R. China
| | - Shao-Qi Zhi
- Tianjin Key Laboratory of Chemical Process Safety and Equipment Technology, School of Chemical Engineering and Technology, Tianjin University, Tianjin300350, P. R. China
| | - Yu-Dong Shan
- Tianjin Key Laboratory of Chemical Process Safety and Equipment Technology, School of Chemical Engineering and Technology, Tianjin University, Tianjin300350, P. R. China
| | - Yi-Fang Lu
- Tianjin Key Laboratory of Chemical Process Safety and Equipment Technology, School of Chemical Engineering and Technology, Tianjin University, Tianjin300350, P. R. China
| | - Hai-Tao Ren
- School of Textile Science and Engineering, Tiangong University, Tianjin300387, P. R. China
| | - Song-Hai Wu
- Tianjin Key Laboratory of Chemical Process Safety and Equipment Technology, School of Chemical Engineering and Technology, Tianjin University, Tianjin300350, P. R. China
| | - Yong Liu
- School of Chemistry and Chemical Engineering, Tianjin University of Technology, Tianjin300384, P. R. China
| | - Xu Han
- Tianjin Key Laboratory of Chemical Process Safety and Equipment Technology, School of Chemical Engineering and Technology, Tianjin University, Tianjin300350, P. R. China
| |
Collapse
|
4
|
Droguett K, Quintero GE, Santos JG, Aliaga ME. Advancement in supramolecular control of organic reactivity induced by cucurbit[n]urils. J INCL PHENOM MACRO 2022. [DOI: 10.1007/s10847-022-01172-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
|
5
|
Ibeji CU, Ukogu K, Kelani MT, Ani FE, Obasi NL, Ogundare SA, Maguire GE, Kruger HG. Synthesis, Crystal structure, photoluminescence properties and quantum mechanics studies of two schiff bases of 2-amino-p-cresol. J Mol Struct 2022. [DOI: 10.1016/j.molstruc.2022.133046] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
|
6
|
Rad N, Sashuk V. Effect of Na + and K + on the cucurbituril-mediated hydrolysis of a phenyl acetate. Chem Commun (Camb) 2022; 58:5249-5252. [PMID: 35388837 DOI: 10.1039/d2cc00772j] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The environment around the active site affects the catalytic activity of enzymes. Studying the cucurbit[7]uril-promoted acid hydrolysis of a cationic phenyl acetate derivative, we found that the hydrophobic cavity of the macrocycle screens the reaction centre from the positively charged neighbouring group. Moreover, the chelation of alkali metal cations with the cucurbit[7]uril portal and acetyl group of the substrate reduces the hydrolysis rate of the encapsulated ester in an aqueous solution. This type of inhibition corresponds to a rare uncompetitive model in contrast to the more common competitive model that relies on substrate displacement.
Collapse
Affiliation(s)
- Nazar Rad
- Institute of Physical Chemistry, Polish Academy of Sciences, Kasprzaka 44/52, 01-224 Warsaw, Poland.
| | - Volodymyr Sashuk
- Institute of Physical Chemistry, Polish Academy of Sciences, Kasprzaka 44/52, 01-224 Warsaw, Poland.
| |
Collapse
|
7
|
Alcázar JJ, Márquez E, García-Río L, Robles-Muñoz A, Fierro A, Santos JG, Aliaga ME. Changes in Protonation Sites of 3-Styryl Derivatives of 7-(dialkylamino)-aza-coumarin Dyes Induced by Cucurbit[7]uril. Front Chem 2022; 10:870137. [PMID: 35494653 PMCID: PMC9046931 DOI: 10.3389/fchem.2022.870137] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/06/2022] [Accepted: 03/03/2022] [Indexed: 11/13/2022] Open
Abstract
The incorporation of a guest, with different basic sites, into an organized system (host), such as macrocycles, could stabilize, detect, or promote the formation of a certain protomer. In this context, this work aimed to study the influence of cucurbit[7]uril (CB7) on dyes such as 7-(dimethylamino)-aza-coumarins, which have more than one basic site along their molecular structure. For this, three 3-styryl derivatives of 7-(dialkylamino)-aza-coumarin dyes (SAC1-3) were synthesized and characterized by NMR, ESI-HRMS and IR. The spectral behaviour of the SACs in the absence and presence of CB7 was studied. The results showed large shifts in the UV-vis spectrum in acid medium: a hypsochromic shift of ≈5400 cm−1 (SAC1-2) and ≈3500 cm−1 (SAC3) in the absence of CB7 and a bathochromic shift of ≈4500 cm−1 (SAC1-3) in the presence of CB7. The new absorptions at long and short wavelengths were assigned to the corresponding protomers by computational calculations at the density functional theory (DFT) level. Additionally, the binding mode was corroborated by molecular dynamics simulations. Findings revealed that in the presence of CB7 the heterocyclic nitrogen was preferably protonated instead of the dialkylamino group. Namely, CB7 induces a change in the protonation preference at the basic sites of the SACs, as consequence of the molecular recognition by the macrocycle.
Collapse
Affiliation(s)
- Jackson J. Alcázar
- Facultad de Química y de Farmacia, Pontificia Universidad Católica de Chile, Santiago, Chile
| | - Edgar Márquez
- Departamento de Química y Biología, Facultad de Ciencias Exactas, Grupo de Investigaciones en Química y Biología, Universidad Del Norte, Barranquilla, Colombia
| | - Luis García-Río
- Departamento de Química Física, Centro de Investigación en Química Biológica y Materiales Moleculares (CIQUS), Universidad de Santiago, Santiago, Spain
| | - Agustín Robles-Muñoz
- Facultad de Química y de Farmacia, Pontificia Universidad Católica de Chile, Santiago, Chile
| | - Angélica Fierro
- Facultad de Química y de Farmacia, Pontificia Universidad Católica de Chile, Santiago, Chile
| | - José G. Santos
- Facultad de Química y de Farmacia, Pontificia Universidad Católica de Chile, Santiago, Chile
- *Correspondence: José G. Santos, ; Margarita E. Aliaga,
| | - Margarita E. Aliaga
- Facultad de Química y de Farmacia, Pontificia Universidad Católica de Chile, Santiago, Chile
- *Correspondence: José G. Santos, ; Margarita E. Aliaga,
| |
Collapse
|
8
|
Jin Y, Li M, Liu M, Ge Q, Cong H, Tao Z. Cucurbit[7]uril‐Catalyzed Controllable Pinacol Rearrangement with Activated Hydride Migration. European J Org Chem 2022. [DOI: 10.1002/ejoc.202101446] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Ye Jin
- Guizhou University Enterprise Technology Center of Guizhou Province CHINA
| | - Min Li
- Guizhou University Enterprise Technology Center of Guizhou Province CHINA
| | - Mao Liu
- Guizhou University Enterprise Technology Center of Guizhou Province CHINA
| | - Qingmei Ge
- Guizhou University Enterprise Technology Center of Guizhou Province Huaxi district 550025 Guiyang CHINA
| | - Hang Cong
- Guizhou University Enterprise Technology Center of Guizhou Province CHINA
| | - Zhu Tao
- Guizhou University Key Laboratory of Macrocyclic and Supramolecular Chemistry of Guizhou Province CHINA
| |
Collapse
|
9
|
Geue N, Winpenny REP, Barran PE. Structural characterisation methods for supramolecular chemistry that go beyond crystallography. Chem Soc Rev 2021; 51:8-27. [PMID: 34817479 DOI: 10.1039/d0cs01550d] [Citation(s) in RCA: 16] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
Supramolecular chemistry has grown rapidly over the past three decades, yet synthetic supramolecular chemists still face several challenges when it comes to characterising their compounds. In this review, we present an introduction to structural characterisation techniques commonly used for non-crystalline supramolecular molecules, e.g. nuclear magnetic and electron paramagnetic resonance spectroscopy (NMR and EPR), mass spectrometry (MS), ion mobility mass spectrometry (IM-MS), small-angle neutron and X-ray scattering (SANS and SAXS) as well as cryogenic transmission electron microscopy (cryo-TEM). We provide an overview of their fundamental concepts based on case studies from different fields of supramolecular chemistry, e.g. interlocked structures, molecular self-assembly and host-guest chemistry, while focussing on particular strengths and weaknesses of the discussed methods. Additionally, three multi-technique case studies are examined in detail to illustrate the benefits of using complementary techniques simultaneously.
Collapse
Affiliation(s)
- Niklas Geue
- Michael Barber Centre for Collaborative Mass Spectrometry, Manchester Institute of Biotechnology, 131 Princess Street, Manchester, M1 7DN, UK.
| | - Richard E P Winpenny
- Department of Chemistry, The University of Manchester, Oxford Road, Manchester, M13 9PL, UK
| | - Perdita E Barran
- Michael Barber Centre for Collaborative Mass Spectrometry, Manchester Institute of Biotechnology, 131 Princess Street, Manchester, M1 7DN, UK.
| |
Collapse
|