1
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Wei MK, Moseley DF, Bär RM, Sempere Y, Willis MC. Palladium-Catalyzed Addition of Aryl Halides to N-Sulfinylamines for the Synthesis of Sulfinamides. J Am Chem Soc 2024; 146:19690-19695. [PMID: 38994915 PMCID: PMC11273345 DOI: 10.1021/jacs.4c06726] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/16/2024] [Revised: 07/06/2024] [Accepted: 07/08/2024] [Indexed: 07/13/2024]
Abstract
Sulfinamides are versatile, synthetically useful intermediates, and final motifs. Traditional methods to synthesize sulfinamides generally require substrates with preinstalled sulfur centers. However, these precursors have limited commercial availability, and the associated synthetic routes often require harsh reaction conditions and highly reactive reagents, thus severely limiting their application. Herein, we report the synthesis of sulfinamides from aryl and alkenyl (pseudo)halides and N-sulfinylamines, enabled by palladium catalysis. The reactions use mild conditions and are achieved without the use of highly reactive preformed organometallic reagents, resulting in transformations of broad generality and high functional group tolerance. In particular, substrates featuring protic and electrophilic functional groups can be used successfully. The modification of complex aryl cores and natural product derivatives demonstrates the utility of this method.
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Affiliation(s)
- Ming-Kai Wei
- Department
of Chemistry, University of Oxford, Mansfield Road, Oxford OX1 3TA, United Kingdom
| | - Daniel F. Moseley
- Department
of Chemistry, University of Oxford, Mansfield Road, Oxford OX1 3TA, United Kingdom
| | - Robin M. Bär
- Research
& Development, Crop Science, Bayer AG, Alfred-Nobel-Str. 50, Monheim am Rhein 40789, Germany
| | - Yeshua Sempere
- Research
& Development, Crop Science, Bayer AG, Alfred-Nobel-Str. 50, Monheim am Rhein 40789, Germany
| | - Michael C. Willis
- Department
of Chemistry, University of Oxford, Mansfield Road, Oxford OX1 3TA, United Kingdom
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2
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Zhang HN, Huang X, Jin GX. Efficient and Selective Construction of 4 1 2 Metalla-links Using Weak C-H⋅⋅⋅Halogen Interactions. Angew Chem Int Ed Engl 2024; 63:e202405399. [PMID: 38570193 DOI: 10.1002/anie.202405399] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/19/2024] [Revised: 04/02/2024] [Accepted: 04/03/2024] [Indexed: 04/05/2024]
Abstract
Through a coordination-driven self-assembly method, four4 1 2 ${4_1^2 }$ metalla-links and one tetranuclear monocycle were constructed with high selectivity and yield by adjusting the substituent species of the building blocks, as evidenced using X-ray crystallographic analysis, electrospray ionization-time-of-flight/mass spectrometry (ESI-TOF/MS), elemental analysis and detailed solution-state nuclear magnetic resonance (NMR) spectroscopy. Based on X-ray crystallographic analysis and independent gradient model analysis, a significant factor leading to the formation of4 1 2 ${4_1^2 }$ metalla-links was the introduction of F, Cl, Br and I atoms, which generated additional weak C-H⋅⋅⋅X (X=F, Cl, Br and I) interactions. Furthermore, the dynamic conversion of4 1 2 ${4_1^2 }$ metalla-links to monocyclic rings in methanol solution was systematically investigated using quantitative 1H NMR techniques.
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Affiliation(s)
- Hai-Ning Zhang
- Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials, State Key Laboratory of Molecular Engineering of Polymers, Department of Chemistry, Fudan University, 2005 Songhu Rd, 200438, Shanghai, P. R. China
| | - Xi Huang
- Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials, State Key Laboratory of Molecular Engineering of Polymers, Department of Chemistry, Fudan University, 2005 Songhu Rd, 200438, Shanghai, P. R. China
| | - Guo-Xin Jin
- Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials, State Key Laboratory of Molecular Engineering of Polymers, Department of Chemistry, Fudan University, 2005 Songhu Rd, 200438, Shanghai, P. R. China
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3
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Rufino VC, Pliego JR. Bifunctional iminophosphorane organocatalyst with additional hydrogen bonding: Calculations predict enhanced catalytic performance in a michael addition reaction. J Mol Graph Model 2024; 129:108760. [PMID: 38513601 DOI: 10.1016/j.jmgm.2024.108760] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/11/2023] [Revised: 02/29/2024] [Accepted: 03/11/2024] [Indexed: 03/23/2024]
Abstract
A new iminophosphorane-thiourea superbase was rationally designed and investigated as an organocatalyst for the enantioselective Michael addition reaction of nitromethane to 4-phenylbut-3-en-2-one. Starting from an iminophosphorane-thiourea organocatalyst structure already known, we have used theoretical calculations to determine the structures of transition states involved in the carbon-carbon bond formation step and carried out structural modifications to accelerate the reaction rate and to increase the enantioselectivity. The effective structural modification was adding a rigid hydroxyl group able to make an additional hydrogen bond to the transition state, producing a substantial decrease of the ΔG‡ by 7 kcal mol-1. The enantiomeric excess is predicted to be above of 97% using the reliable M06-2X and ωB97M - V functionals. The determination of the complete reaction mechanism and free energy profile was followed by a detailed microkinetic analysis. The present study points out a new direction for structural modifications on this kind of organocatalyst.
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Affiliation(s)
- Virginia C Rufino
- Departamento de Ciências Naturais, Universidade Federal de São João del-Rei, 36301-160, São João del-Rei, MG, Brazil
| | - Josefredo R Pliego
- Departamento de Ciências Naturais, Universidade Federal de São João del-Rei, 36301-160, São João del-Rei, MG, Brazil.
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4
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Kong X, Zhang X, Yuan B, Zhang W, Lu D, Du P. Synthesis and Photophysical Properties of a Chiral Carbon Nanoring Containing Rubicene. J Org Chem 2024. [PMID: 38771292 DOI: 10.1021/acs.joc.4c00387] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/22/2024]
Abstract
Herein we report the construction of an inherently chiral carbon nanoring, cyclo[7]paraphenylene-2,9-rubicene ([7]CPPRu2,9), by combining rubicene with a C-shaped synthon through the Suzuki-Miyaura coupling reaction. The structure was fully confirmed by high-resolution mass spectroscopies (HR-MS) and various NMR techniques. The photophysical properties were investigated by UV-vis absorption and fluorescence spectroscopy as well as the time-resolved fluorescence decay. Moreover, two enantiomers (M)/(P)-[7]CPPRu2,9 were successfully resolved by recyclable HPLC and studied by CD and CPL spectra.
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Affiliation(s)
- Xin Kong
- Hefei National Research Center for Physical Sciences at Microscale, Anhui Laboratory of Advanced Photon Science and Technology, CAS Key Laboratory of Materials for Energy Conversion, Department of Materials Science and Engineering, iChEM, University of Science and Technology of China, 96 Jinzhai Road, Hefei, Anhui Province 230026, P. R. China
| | - Xinyu Zhang
- Hefei National Research Center for Physical Sciences at Microscale, Anhui Laboratory of Advanced Photon Science and Technology, CAS Key Laboratory of Materials for Energy Conversion, Department of Materials Science and Engineering, iChEM, University of Science and Technology of China, 96 Jinzhai Road, Hefei, Anhui Province 230026, P. R. China
| | - Bing Yuan
- Hefei National Research Center for Physical Sciences at Microscale, Anhui Laboratory of Advanced Photon Science and Technology, CAS Key Laboratory of Materials for Energy Conversion, Department of Materials Science and Engineering, iChEM, University of Science and Technology of China, 96 Jinzhai Road, Hefei, Anhui Province 230026, P. R. China
| | - Wen Zhang
- Hefei National Research Center for Physical Sciences at Microscale, Anhui Laboratory of Advanced Photon Science and Technology, CAS Key Laboratory of Materials for Energy Conversion, Department of Materials Science and Engineering, iChEM, University of Science and Technology of China, 96 Jinzhai Road, Hefei, Anhui Province 230026, P. R. China
| | - Dapeng Lu
- Inflammation and Immune Mediated Diseases Laboratory of Anhui Province, Anhui Institute of Innovative Drugs, School of Pharmacy, Anhui Medical University, 81 Meishan Road, Hefei, Anhui Province 230032, P. R. China
| | - Pingwu Du
- Hefei National Research Center for Physical Sciences at Microscale, Anhui Laboratory of Advanced Photon Science and Technology, CAS Key Laboratory of Materials for Energy Conversion, Department of Materials Science and Engineering, iChEM, University of Science and Technology of China, 96 Jinzhai Road, Hefei, Anhui Province 230026, P. R. China
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5
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Albiheyri R, Ahmad V, Khan MI, Alzahrani FA, Jamal QMS. Investigating the Antiviral Properties of Nyctanthes arbor-tristis Linn against the Ebola, SARS-CoV-2, Nipah, and Chikungunya Viruses: A Computational Simulation Study. Pharmaceuticals (Basel) 2024; 17:581. [PMID: 38794151 PMCID: PMC11124395 DOI: 10.3390/ph17050581] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/06/2024] [Revised: 04/26/2024] [Accepted: 04/29/2024] [Indexed: 05/26/2024] Open
Abstract
Background: The hunt for naturally occurring antiviral compounds to combat viral infection was expedited when COVID-19 and Ebola spread rapidly. Phytochemicals from Nyctanthes arbor-tristis Linn were evaluated as significant inhibitors of these viruses. Methods: Computational tools and techniques were used to assess the binding pattern of phytochemicals from Nyctanthes arbor-tristis Linn to Ebola virus VP35, SARS-CoV-2 protease, Nipah virus glycoprotein, and chikungunya virus. Results: Virtual screening and AutoDock analysis revealed that arborside-C, beta amyrin, and beta-sitosterol exhibited a substantial binding affinity for specific viral targets. The arborside-C and beta-sitosterol molecules were shown to have binding energies of -8.65 and -9.11 kcal/mol, respectively, when interacting with the major protease. Simultaneously, the medication remdesivir exhibited a control value of -6.18 kcal/mol. The measured affinity of phytochemicals for the other investigated targets was -7.52 for beta-amyrin against Ebola and -6.33 kcal/mol for nicotiflorin against Nipah virus targets. Additional molecular dynamics simulation (MDS) conducted on the molecules with significant antiviral potential, specifically the beta-amyrin-VP35 complex showing a stable RMSD pattern, yielded encouraging outcomes. Conclusions: Arborside-C, beta-sitosterol, beta-amyrin, and nicotiflorin could be established as excellent natural antiviral compounds derived from Nyctanthes arbor-tristis Linn. The virus-suppressing phytochemicals in this plant make it a compelling target for both in vitro and in vivo research in the future.
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Affiliation(s)
- Raed Albiheyri
- Department of Biological Sciences, Faculty of Science, King Abdulaziz University, Jeddah 21589, Saudi Arabia
- Centre of Excellence in Bionanoscience Research, King Abdulaziz University, Jeddah 21589, Saudi Arabia
| | - Varish Ahmad
- Health Information Technology Department, The Applied College, King Abdulaziz University, Jeddah 21589, Saudi Arabia;
- Centre for Artificial Intelligence in Precision Medicine, King Abdulaziz University, Jeddah 21589, Saudi Arabia
| | - Mohammad Imran Khan
- Research Center, King Faisal Specialist Hospital and Research Center, Jeddah 21499, Saudi Arabia;
| | - Faisal A. Alzahrani
- Department of Biochemistry, Faculty of Science, Embryonic Stem Cell Unit, King Fahad Center for Medical Research, King Abdulaziz University, Jeddah 21589, Saudi Arabia;
| | - Qazi Mohammad Sajid Jamal
- Department of Health Informatics, College of Applied Medical Sciences, Qassim University, Buraydah 51452, Saudi Arabia
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6
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Deng C, Yang B, Liang Y, Zhao Y, Gui B, Hou C, Shang Y, Zhang J, Song T, Gong X, Chen N, Wu F, Chen R. Bipolar Polymeric Protective Layer for Dendrite-Free and Corrosion-Resistant Lithium Metal Anode in Ethylene Carbonate Electrolyte. Angew Chem Int Ed Engl 2024; 63:e202400619. [PMID: 38403860 DOI: 10.1002/anie.202400619] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/09/2024] [Revised: 02/12/2024] [Accepted: 02/22/2024] [Indexed: 02/27/2024]
Abstract
The unstable interface between Li metal and ethylene carbonate (EC)-based electrolytes triggers continuous side reactions and uncontrolled dendrite growth, significantly impacting the lifespan of Li metal batteries (LMBs). Herein, a bipolar polymeric protective layer (BPPL) is developed using cyanoethyl (-CH2CH2C≡N) and hydroxyl (-OH) polar groups, aiming to prevent EC-induced corrosion and facilitating rapid, uniform Li+ ion transport. Hydrogen-bonding interactions between -OH and EC facilitates the Li+ desolvation process and effectively traps free EC molecules, thereby eliminating parasitic reactions. Meanwhile, the -CH2CH2C≡N group anchors TFSI- anions through ion-dipole interactions, enhancing Li+ transport and eliminating concentration polarization, ultimately suppressing the growth of Li dendrite. This BPPL enabling Li|Li cell stable cycling over 750 cycles at 10 mA cm-2 for 2 mAh cm-2. The Li|LiNi0.8Mn0.1Co0.1O2 and Li|LiFePO4 full cells display superior electrochemical performance. The BPPL provides a practical strategy to enhanced stability and performance in LMBs application.
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Affiliation(s)
- Chenglong Deng
- Beijing Key Laboratory of Environmental Science and Engineering, School of Materials Science and Engineering, Beijing Institute of Technology, Beijing, 100081, China
- Advanced Technology Research Institute, Beijing Institute of Technology, Jinan, 250300, China
| | - Binbin Yang
- Beijing Key Laboratory of Environmental Science and Engineering, School of Materials Science and Engineering, Beijing Institute of Technology, Beijing, 100081, China
| | - Yaohui Liang
- Beijing Key Laboratory of Environmental Science and Engineering, School of Materials Science and Engineering, Beijing Institute of Technology, Beijing, 100081, China
| | - Yi Zhao
- Beijing Key Laboratory of Environmental Science and Engineering, School of Materials Science and Engineering, Beijing Institute of Technology, Beijing, 100081, China
- Advanced Technology Research Institute, Beijing Institute of Technology, Jinan, 250300, China
| | - Boshun Gui
- Beijing Key Laboratory of Environmental Science and Engineering, School of Materials Science and Engineering, Beijing Institute of Technology, Beijing, 100081, China
| | - Chuanyu Hou
- Beijing Key Laboratory of Environmental Science and Engineering, School of Materials Science and Engineering, Beijing Institute of Technology, Beijing, 100081, China
| | - Yanxin Shang
- Beijing Key Laboratory of Environmental Science and Engineering, School of Materials Science and Engineering, Beijing Institute of Technology, Beijing, 100081, China
- Advanced Technology Research Institute, Beijing Institute of Technology, Jinan, 250300, China
| | - Jinxiang Zhang
- Beijing Key Laboratory of Environmental Science and Engineering, School of Materials Science and Engineering, Beijing Institute of Technology, Beijing, 100081, China
| | - Tinglu Song
- Beijing Key Laboratory of Environmental Science and Engineering, School of Materials Science and Engineering, Beijing Institute of Technology, Beijing, 100081, China
| | - Xuzhong Gong
- School of Chemical Engineering, University of Chinese Academy of Sciences, Beijing, 100049, China
| | - Nan Chen
- Beijing Key Laboratory of Environmental Science and Engineering, School of Materials Science and Engineering, Beijing Institute of Technology, Beijing, 100081, China
- Advanced Technology Research Institute, Beijing Institute of Technology, Jinan, 250300, China
| | - Feng Wu
- Beijing Key Laboratory of Environmental Science and Engineering, School of Materials Science and Engineering, Beijing Institute of Technology, Beijing, 100081, China
- Advanced Technology Research Institute, Beijing Institute of Technology, Jinan, 250300, China
- Collaborative Innovation Center of Electric Vehicles in Beijing, Beijing, 100081, China
| | - Renjie Chen
- Beijing Key Laboratory of Environmental Science and Engineering, School of Materials Science and Engineering, Beijing Institute of Technology, Beijing, 100081, China
- Advanced Technology Research Institute, Beijing Institute of Technology, Jinan, 250300, China
- Collaborative Innovation Center of Electric Vehicles in Beijing, Beijing, 100081, China
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7
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Chetty LC, Kruger HG, Arvidsson PI, Naicker T, Govender T. Investigating the efficacy of green solvents and solvent-free conditions in hydrogen-bonding mediated organocatalyzed model reactions. RSC Adv 2024; 14:7992-7998. [PMID: 38454950 PMCID: PMC10918449 DOI: 10.1039/d4ra00679h] [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: 01/26/2024] [Accepted: 02/25/2024] [Indexed: 03/09/2024] Open
Abstract
In this study, we have delved into various reactions conducted using green solvents or under solvent-free conditions, employing hydrogen bonding organocatalysis to advance more sustainable practices in chemical synthesis. The outcomes suggest that cyclopentyl methyl ether could potentially replace non-polar organic solvents such as hexane and toluene with comparable enantioselectivity and yields. The non-polar nature of liquefied or supercritical CO2 restricts its application to reactions that require non-polar solvents. Furthermore, pursuing solvent-free conditions, even without liquid substrates, might result in similar conversion rates with reduced catalyst loading. These findings highlight the potential of exploring solvent-free conditions when enantioselectivity is not of concern. Based on the results, solvent-free conditions and bio-based solvents can serve as viable alternatives to conventional organic solvents without compromising performance. This is expected to influence the way chemists approach reaction optimisation within method development in the field, fostering a broader adoption of environmentally friendly approaches.
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Affiliation(s)
- Lloyd C Chetty
- Catalysis and Peptide Research Unit, University of KwaZulu Natal Durban 4001 South Africa
| | - Hendrik G Kruger
- Catalysis and Peptide Research Unit, University of KwaZulu Natal Durban 4001 South Africa
| | - Per I Arvidsson
- Catalysis and Peptide Research Unit, University of KwaZulu Natal Durban 4001 South Africa
- Science for Life Laboratory, Drug Discovery & Development Platform & Division of Translational Medicine and Chemical Biology, Department of Medical Biochemistry and Biophysics, Karolinska Institutet Stockholm Sweden
| | - Tricia Naicker
- Catalysis and Peptide Research Unit, University of KwaZulu Natal Durban 4001 South Africa
| | - Thavendran Govender
- Department of Chemistry, University of Zululand Private Bag X1001 KwaDlangezwa 3886 South Africa
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8
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Lee H, Nam H, Lee SY. Enantio- and Diastereoselective Variations on α-Iminonitriles: Harnessing Chiral Cyclopropenimine-Thiourea Organocatalysts. J Am Chem Soc 2024; 146:3065-3074. [PMID: 38281151 DOI: 10.1021/jacs.3c09911] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/30/2024]
Abstract
Chiral 1-pyrrolines containing a nitrile motif serve as crucial structural scaffolds in biologically active molecules and exhibit diversity as building blocks owing to their valuable functional groups; however, the asymmetric synthesis of such compounds remains largely unexplored. Herein, we present an enantio- and diastereoselective method for the synthesis of α-chiral nitrile-containing 1-pyrroline derivatives bearing vicinal stereocenters through the design and introduction of chiral cyclopropenimine-based bifunctional catalysts featuring a thiourea moiety. This synthesis entails a highly stereoselective conjugate addition of α-iminonitriles to a wide array of enones, followed by cyclocondensation, thereby affording a series of cyanopyrroline derivatives, some of which contain all-carbon quaternary centers. Moreover, we demonstrate the synthetic utility of this strategy by performing a gram-scale reaction with 1% catalyst loading, along with a variety of chemoselective transformations of the product, including the synthesis of a vildagliptin analogue. Finally, we showcase the selective synthesis of all four stereoisomers of the cyanopyrroline products through trans-to-cis isomerization, highlighting the versatility of our approach.
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Affiliation(s)
- Hooseung Lee
- Department of Chemistry, Yonsei University, Seoul 03722, Republic of Korea
| | - Hyeongwoo Nam
- Department of Chemistry, Yonsei University, Seoul 03722, Republic of Korea
| | - Sarah Yunmi Lee
- Department of Chemistry, Yonsei University, Seoul 03722, Republic of Korea
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9
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de Azevedo Santos L, van der Voort S, Burema SR, Fonseca Guerra C, Bickelhaupt FM. Blueshift in Trifurcated Hydrogen Bonds: A Tradeoff between Tetrel Bonding and Steric Repulsion. Chemphyschem 2024; 25:e202300480. [PMID: 37864778 DOI: 10.1002/cphc.202300480] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/04/2023] [Revised: 10/17/2023] [Accepted: 10/20/2023] [Indexed: 10/23/2023]
Abstract
We have quantum chemically investigated the origin of the atypical blueshift of the H-C bond stretching frequency in the hydrogen-bonded complex X- •••H3 C-Y (X, Y=F, Cl, Br, I), as compared to the corresponding redshift occurring in Cl- •••H3 N and Cl- •••H3 C-H, using relativistic density functional theory (DFT) at ZORA-BLYP-D3(BJ)/QZ4P. Previously, this blueshift was attributed, among others, to the contraction of the H-C bonds as the H3 C moiety becomes less pyramidal. Herein, we provide quantitative evidence that, instead, the blueshift arises from a direct and strong X- •••C interaction of the HOMO of A- with the backside lobe on carbon of the low-lying C-Y antibonding σ* LUMO of the H3 C-Y fragment. This X- •••C bond, in essence a tetrel bond, pushes the H atoms towards a shorter H-C distance and makes the H3 C moiety more planar. The blueshift may, therefore, serve as a diagnostic for tetrel bonding.
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Affiliation(s)
- Lucas de Azevedo Santos
- Department of Chemistry and Pharmaceutical Sciences, AIMMS, Vrije Universiteit, Amsterdam, De Boelelaan 1108, 1081 HZ Amsterdam, The Netherlands
| | - Storm van der Voort
- Department of Chemistry and Pharmaceutical Sciences, AIMMS, Vrije Universiteit, Amsterdam, De Boelelaan 1108, 1081 HZ Amsterdam, The Netherlands
| | - Shiri R Burema
- Department of Chemistry and Pharmaceutical Sciences, AIMMS, Vrije Universiteit, Amsterdam, De Boelelaan 1108, 1081 HZ Amsterdam, The Netherlands
| | - Célia Fonseca Guerra
- Department of Chemistry and Pharmaceutical Sciences, AIMMS, Vrije Universiteit, Amsterdam, De Boelelaan 1108, 1081 HZ Amsterdam, The Netherlands
| | - F Matthias Bickelhaupt
- Department of Chemistry and Pharmaceutical Sciences, AIMMS, Vrije Universiteit, Amsterdam, De Boelelaan 1108, 1081 HZ Amsterdam, The Netherlands
- Institute for Molecules and Materials, Radboud University, Heyendaalseweg 135, 6525 AJ, Nijmegen, The Netherlands
- Department of Chemical Sciences, University of Johannesburg Auckland Park, Johannesburg, 2006, South Africa
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10
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Faris A, Alnajjar R, Guo J, AL Mughram MH, Aouidate A, Asmari M, Elhallaoui M. Computational 3D Modeling-Based Identification of Inhibitors Targeting Cysteine Covalent Bond Catalysts for JAK3 and CYP3A4 Enzymes in the Treatment of Rheumatoid Arthritis. Molecules 2023; 29:23. [PMID: 38202604 PMCID: PMC10779482 DOI: 10.3390/molecules29010023] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/26/2023] [Revised: 12/08/2023] [Accepted: 12/14/2023] [Indexed: 01/12/2024] Open
Abstract
This work aimed to find new inhibitors of the CYP3A4 and JAK3 enzymes, which are significant players in autoimmune diseases such as rheumatoid arthritis. Advanced computer-aided drug design techniques, such as pharmacophore and 3D-QSAR modeling, were used. Two strong 3D-QSAR models were created, and their predictive power was validated by the strong correlation (R2 values > 80%) between the predicted and experimental activity. With an ROC value of 0.9, a pharmacophore model grounded in the DHRRR hypothesis likewise demonstrated strong predictive ability. Eight possible inhibitors were found, and six new inhibitors were designed in silico using these computational models. The pharmacokinetic and safety characteristics of these candidates were thoroughly assessed. The possible interactions between the inhibitors and the target enzymes were made clear via molecular docking. Furthermore, MM/GBSA computations and molecular dynamics simulations offered insightful information about the stability of the binding between inhibitors and CYP3A4 or JAK3. Through the integration of various computational approaches, this study successfully identified potential inhibitor candidates for additional investigation and efficiently screened compounds. The findings contribute to our knowledge of enzyme-inhibitor interactions and may help us create more effective treatments for autoimmune conditions like rheumatoid arthritis.
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Affiliation(s)
- Abdelmoujoud Faris
- LIMAS, Department of Chemical Sciences, Faculty of Sciences Dhar El Mahraz, Sidi Mohamed Ben Abdellah University, Fez 30000, Morocco;
| | - Radwan Alnajjar
- Department of Chemistry, Faculty of Science, University of Benghazi, Benghazi 16063, Libya;
- PharmD, Faculty of Pharmacy, Libyan International Medical University, Benghazi 16063, Libya
- Department of Chemistry, University of Cape Town, Rondebosch 7701, South Africa
| | - Jingjing Guo
- Centre in Artificial Intelligence-Driven Drug Discovery, Faculty of Applied Sciences, Macao Polytechnic University, Macao 999078, China;
| | - Mohammed H. AL Mughram
- Department of Pharmaceutical Chemistry, College of Pharmacy, King Khalid University, Abha 61421, Saudi Arabia; (M.H.A.M.); (M.A.)
| | - Adnane Aouidate
- Laboratory of Organic Chemistry and Physical Chemistry, Team of Molecular Modeling, Materials and Environment, Faculty of Sciences, University Ibn Zohr, Agadir 80060, Morocco;
| | - Mufarreh Asmari
- Department of Pharmaceutical Chemistry, College of Pharmacy, King Khalid University, Abha 61421, Saudi Arabia; (M.H.A.M.); (M.A.)
| | - Menana Elhallaoui
- LIMAS, Department of Chemical Sciences, Faculty of Sciences Dhar El Mahraz, Sidi Mohamed Ben Abdellah University, Fez 30000, Morocco;
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11
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Matienko LI, Mil EM, Albantova AA, Goloshchapov AN. The Role H-Bonding and Supramolecular Structures in Homogeneous and Enzymatic Catalysis. Int J Mol Sci 2023; 24:16874. [PMID: 38069195 PMCID: PMC10707003 DOI: 10.3390/ijms242316874] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/31/2023] [Revised: 11/22/2023] [Accepted: 11/23/2023] [Indexed: 12/18/2023] Open
Abstract
The article analyzes the role of hydrogen bonds and supramolecular structures in enzyme catalysis and model systems. Hydrogen bonds play a crucial role in many enzymatic reactions. However, scientists have only recently attempted to harness the power of hydrogen bonds in homogeneous catalytic systems. One of the newest directions is associated with attempts to control the properties of catalysts by influencing the "second coordination sphere" of metal complexes. The role H-bonding, and the building of stable supramolecular nanostructures due to intermolecular H-bonds, based on catalytic active heteroligand iron (Fe) or nickel (Ni) complexes formed during hydrocarbon oxidations were assessed via the AFM (Atomic-force microscopy) method, which was proposed and applied by authors of this manuscript. Th is article also discusses the roles of hydrogen bonds and supramolecular structures in oxidation reactions catalyzed by heteroligand Ni and Fe complexes, which are not only effective homogeneous catalysts but also structural and functional models of Oxygenases.
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Affiliation(s)
- Ludmila I. Matienko
- N.M. Emanuel Institution of Biochemical Physics Russian Academy of Science, 4 Kosygin Str., 119334 Moscow, Russia; (E.M.M.); (A.A.A.); (A.N.G.)
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12
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Beckmann JL, Krieft J, Vishnevskiy YV, Neumann B, Stammler HG, Mitzel NW. A Bidentate Antimony Pnictogen Bonding Host System. Angew Chem Int Ed Engl 2023; 62:e202310439. [PMID: 37773008 DOI: 10.1002/anie.202310439] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/21/2023] [Revised: 09/27/2023] [Accepted: 09/27/2023] [Indexed: 09/30/2023]
Abstract
A bidentate pnictogen bonding host-system based on 1,8-diethynylanthracene was synthesized by a selective tin-antimony exchange reaction and investigated regarding its ability to act as a Lewis acidic host component for the complexation of Lewis basic or anionic guests. In this work, the novel C≡C-Sb(C2 F5 )2 unit was established to study the potential of antimony(III) sites as representatives for the scarcely explored pnictogen bonding donors. The capability of this partly fluorinated host system was investigated towards halide anions (Cl- , Br- , I- ), dimethyl chalcogenides Me2 Y (Y=O, S, Se, Te), and nitrogen heterocycles (pyridine, pyrimidine). Insights into the adduct formation behavior as well as the bonding situation of such E⋅⋅⋅Sb-CF moieties were obtained in solution by means of NMR spectroscopy, in the solid state by X-ray diffraction, by elemental analyses, and by computational methods (DFT, QTAIM, IQA), respectively.
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Affiliation(s)
- J Louis Beckmann
- Chair of Inorganic and Structural Chemistry, Center for Molecular Materials CM2 Faculty of Chemistry, Bielefeld University, Universitätsstrasse 25, 33615, Bielefeld, Germany
| | - Jonas Krieft
- Chair of Inorganic and Structural Chemistry, Center for Molecular Materials CM2 Faculty of Chemistry, Bielefeld University, Universitätsstrasse 25, 33615, Bielefeld, Germany
| | - Yury V Vishnevskiy
- Chair of Inorganic and Structural Chemistry, Center for Molecular Materials CM2 Faculty of Chemistry, Bielefeld University, Universitätsstrasse 25, 33615, Bielefeld, Germany
| | - Beate Neumann
- Chair of Inorganic and Structural Chemistry, Center for Molecular Materials CM2 Faculty of Chemistry, Bielefeld University, Universitätsstrasse 25, 33615, Bielefeld, Germany
| | - Hans-Georg Stammler
- Chair of Inorganic and Structural Chemistry, Center for Molecular Materials CM2 Faculty of Chemistry, Bielefeld University, Universitätsstrasse 25, 33615, Bielefeld, Germany
| | - Norbert W Mitzel
- Chair of Inorganic and Structural Chemistry, Center for Molecular Materials CM2 Faculty of Chemistry, Bielefeld University, Universitätsstrasse 25, 33615, Bielefeld, Germany
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13
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Gambhir D, Singh S, Singh RP. Enamine/Iminium-based Dual Organocatalytic Systems for Asymmetric Catalysis and Synthesis. Chem Asian J 2023:e202300627. [PMID: 37910066 DOI: 10.1002/asia.202300627] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/18/2023] [Revised: 10/22/2023] [Accepted: 10/31/2023] [Indexed: 11/03/2023]
Abstract
The rational combination of two catalysts to expedite the construction of chiral complex biologically and pharmacologically relevant chiral compounds has widely gained momentum over the past decade. In particular, enamine or iminium catalysis ensuing from the activation of aldehyde or ketone by chiral amine catalysts in conjugation with other organocatalytic cycles has facilitated several asymmetric transformations to yield the enantioenriched products. Regardless of the considerable discussion on the various dual catalytic approaches, literature lacks a comprehensive review focusing on the enamine and iminium-based dual organocatalytic systems. Thus, this review article has discussed the noteworthy achievements in the field of asymmetric catalysis and synthesis catalyzed by the enamine and iminium-based dual organocatalytic systems.
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Affiliation(s)
- Diksha Gambhir
- Prof. Ravi P. Singh, Department of Chemistry, Institute of Technology Delhi, Hauz Khas, New Delhi, 110-016, India
| | - Sanjay Singh
- Prof. Ravi P. Singh, Department of Chemistry, Institute of Technology Delhi, Hauz Khas, New Delhi, 110-016, India
| | - Ravi P Singh
- Prof. Ravi P. Singh, Department of Chemistry, Institute of Technology Delhi, Hauz Khas, New Delhi, 110-016, India
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14
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Gopakumar K, Samantaray V, Prusty MK, Swain L, Ramanan R. Internal charge-transfer in a metal-catalyzed oxidative addition reaction turns an inhibitive electric field stimulus to catalytic. Chem Commun (Camb) 2023; 59:13054-13057. [PMID: 37846773 DOI: 10.1039/d3cc04283a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2023]
Abstract
In a metal-catalyzed oxidative addition, an oriented external electric field (EEF) catalyzes the reaction along one direction and inhibits it when applied in the opposite direction. Beyond a threshold value, the inhibitory direction becomes catalyzing by swapping the metal-to-ligand charge transfer (MLCT) to ligand-to-metal charge-transfer (LMCT) or vice versa. The change in direction of the charge-transfer mechanism triggers the inversion of the dipole moment along the reaction axis, that results in the resurgence of catalysis. The charge-transfer mechanism in metal-catalyzed oxidative addition is tunable by EEF.
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Affiliation(s)
- Karthik Gopakumar
- Department of Chemistry, National Institute of Technology, Rourkela, Rourkela, Odisha, 769008, India.
| | - Vivekananda Samantaray
- Department of Chemistry, National Institute of Technology, Rourkela, Rourkela, Odisha, 769008, India.
| | - Mithun Kumar Prusty
- Department of Chemistry, National Institute of Technology, Rourkela, Rourkela, Odisha, 769008, India.
| | - Lopita Swain
- Department of Chemistry, National Institute of Technology, Rourkela, Rourkela, Odisha, 769008, India.
| | - Rajeev Ramanan
- Department of Chemistry, National Institute of Technology, Rourkela, Rourkela, Odisha, 769008, India.
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15
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Zhao Y, Luo Y, Liu J, Zheng C, Zhao G. Multiple Hydrogen-Bonding Catalysts Enhance the Asymmetric Cyanation of Ketimines and Aldimines. Chemistry 2023; 29:e202302061. [PMID: 37463871 DOI: 10.1002/chem.202302061] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/28/2023] [Revised: 07/18/2023] [Accepted: 07/18/2023] [Indexed: 07/20/2023]
Abstract
A highly enantioselective cyanation of imines (up to >99 % ee) has been developed using well-designed C2 -symmetric hydrogen bonding catalysts. The catalytic strategy was characterized with low catalyst loading (0.1-1 mol %), easily accessible catalysts with diverse functional groups, and catalytic base additives. A wide range of imines, including the challenging N-Boc and N-Cbz protected ketimines and aldimines, as well as fluoroalkylated ketimines, were investigated under mild conditions to afford the products with good to excellent yields (up to 99 % yield) and high enantioselectivity (up to >99 % ee). Control experiments revealed that the multiple hydrogen bonding catalysts enhanced the reactivity and enantioselectivity of the Strecker reaction initiated by the base.
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Affiliation(s)
- Yunhui Zhao
- Hunan Provincial Key Laboratory of Controllable Preparation and Functional Application of Fine Polymers School of Chemistry and Chemical Engineering, Hunan University of Science and Technology, Xiangtan, Hunan, 411201, P. R. China
- Key Laboratory of Theoretical Organic Chemistry and Functional Molecular, Ministry of Education, Hunan University of Science and Technology, Xiangtan, Hunan, 411201, P. R. China
| | - Yueyang Luo
- Hunan Provincial Key Laboratory of Controllable Preparation and Functional Application of Fine Polymers School of Chemistry and Chemical Engineering, Hunan University of Science and Technology, Xiangtan, Hunan, 411201, P. R. China
| | - Jun Liu
- Key Laboratory of Synthetic Chemistry of Natural Substances Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, 345 Lingling Road, Shanghai, 200032, P. R. China
| | - Changwu Zheng
- School of Pharmacy, Shanghai University of Traditional Chinese Medicine, Shanghai, 201203, P. R. China
| | - Gang Zhao
- Key Laboratory of Synthetic Chemistry of Natural Substances Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, 345 Lingling Road, Shanghai, 200032, P. R. China
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16
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Karale UB, Shinde A, Gaikwad VR, Kalari S, Gourishetti K, Radhakrishnan M, Poornachandra Y, Amanchy R, Chakravarty S, Andugulapati SB, Rode HB. Iron mediated reductive cyclization/oxidation for the generation of chemically diverse scaffolds: An approach in drug discovery. Bioorg Chem 2023; 139:106698. [PMID: 37418784 DOI: 10.1016/j.bioorg.2023.106698] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/17/2023] [Revised: 06/03/2023] [Accepted: 06/20/2023] [Indexed: 07/09/2023]
Abstract
Chemically diverse scaffolds represent a main source of biologically important starting points in drug discovery. Herein, we report the development of such diverse scaffolds from nitroarene/ nitro(hetero)arenes using a key synthetic strategy. In a pilot-scale study, the synthesis of 10 diverse scaffolds was achieved. The 1,7-phenanthroline, thiazolo[5,4-f]quinoline, 2,3-dihydro-1H-pyrrolo[2,3-g]quinoline, pyrrolo[3,2-f]quinoline, 1H-[1,4]oxazino[3,2-g]quinolin-2(3H)-one, [1,2,5]oxadiazolo[3,4-h]quinoline, 7H-pyrido[2,3-c]carbazole, 3H-pyrazolo[4,3-f]quinoline, pyrido[3,2-f]quinoxaline were obtained from nitro hetero arenes in ethanol using iron-acetic acid treatment followed by reaction under oxygen atmosphere. This diverse library is compliant with the rule of five for drug-likeness. The mapping of chemical space represented by these scaffolds revealed a significant contribution to the underrepresented chemical diversity. Crucial to the development of this approach was the mapping of biological space covered by these scaffolds which revealed neurotropic and prophylactic anti-inflammatory activities. In vitro, neuro-biological assays revealed that compounds 14a and 15a showed excellent neurotropic potential and neurite growth compared to controls. Further, anti-inflammatory assays (in vitro and in vivo models) exhibited that Compound 16 showed significant anti-inflammatory activity by attenuating the LPS-induced TNF-α and CD68 levels by modulating the NFkB pathway. In addition, treatment with compound 16 significantly ameliorated the LPS-induced sepsis conditions, and pathological abnormalities (in lung and liver tissues) and improved the survival of the rats compared to LPS control. Owing to their chemical diversity along with bioactivities, it is envisaged that new quality pre-clinical candidates will be generated in the above therapeutic areas using identified leads.
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Affiliation(s)
- Uttam B Karale
- Department of Natural Products and Medicinal Chemistry, CSIR-Indian Institute of Chemical Technology, Tarnaka, Hyderabad 500007, India; Academy of Scientific and Innovative Research (AcSIR), Ghaziabad, Uttar Pradesh 201 002, India
| | - Akash Shinde
- Department of Natural Products and Medicinal Chemistry, CSIR-Indian Institute of Chemical Technology, Tarnaka, Hyderabad 500007, India
| | - Vikas R Gaikwad
- Department of Natural Products and Medicinal Chemistry, CSIR-Indian Institute of Chemical Technology, Tarnaka, Hyderabad 500007, India
| | - Saradhi Kalari
- Department of Natural Products and Medicinal Chemistry, CSIR-Indian Institute of Chemical Technology, Tarnaka, Hyderabad 500007, India; Academy of Scientific and Innovative Research (AcSIR), Ghaziabad, Uttar Pradesh 201 002, India
| | - Karthik Gourishetti
- Academy of Scientific and Innovative Research (AcSIR), Ghaziabad, Uttar Pradesh 201 002, India; Department of Applied Biology, CSIR-Indian Institute of Chemical Technology, Tarnaka, Hyderabad 500 007, India
| | - Mydhili Radhakrishnan
- Academy of Scientific and Innovative Research (AcSIR), Ghaziabad, Uttar Pradesh 201 002, India; Department of Applied Biology, CSIR-Indian Institute of Chemical Technology, Tarnaka, Hyderabad 500 007, India
| | - Yedla Poornachandra
- Department of Applied Biology, CSIR-Indian Institute of Chemical Technology, Tarnaka, Hyderabad 500 007, India
| | - Ramars Amanchy
- Department of Applied Biology, CSIR-Indian Institute of Chemical Technology, Tarnaka, Hyderabad 500 007, India
| | - Sumana Chakravarty
- Academy of Scientific and Innovative Research (AcSIR), Ghaziabad, Uttar Pradesh 201 002, India; Department of Applied Biology, CSIR-Indian Institute of Chemical Technology, Tarnaka, Hyderabad 500 007, India
| | - Sai Balaji Andugulapati
- Academy of Scientific and Innovative Research (AcSIR), Ghaziabad, Uttar Pradesh 201 002, India; Department of Applied Biology, CSIR-Indian Institute of Chemical Technology, Tarnaka, Hyderabad 500 007, India
| | - Haridas B Rode
- Department of Natural Products and Medicinal Chemistry, CSIR-Indian Institute of Chemical Technology, Tarnaka, Hyderabad 500007, India; Academy of Scientific and Innovative Research (AcSIR), Ghaziabad, Uttar Pradesh 201 002, India.
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17
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Thompson AL, White NG. Hydrogen atoms in supramolecular chemistry: a structural perspective. Where are they, and why does it matter? Chem Soc Rev 2023; 52:6254-6269. [PMID: 37599586 DOI: 10.1039/d3cs00516j] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 08/22/2023]
Abstract
Hydrogen bonding interactions are ubiquitous across the biochemical and chemical sciences, and are of particular interest to supramolecular chemists. They have been used to assemble hydrogen bonded polymers, cages and frameworks, and are the functional motif in many host-guest systems. Single crystal X-ray diffraction studies are often used as a key support for proposed structures, although this presents challenges as hydrogen atoms interact only weakly with X-rays. In this Tutorial Review, we discuss the information that can be gleaned about hydrogen bonding interactions through crystallographic experiments, key limitations of the data, and emerging techniques to overcome these limitations.
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Affiliation(s)
- Amber L Thompson
- Chemical Crystallography, Chemistry Research Laboratory, Mansfield Road, Oxford OX1 3TA, UK.
| | - Nicholas G White
- Research School of Chemistry, The Australian National University, Canberra 2601, ACT, Australia.
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18
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Biswas A. Aromatic C-H bond functionalization through organocatalyzed asymmetric intermolecular aza-Friedel-Crafts reaction: a recent update. Beilstein J Org Chem 2023; 19:956-981. [PMID: 37404800 PMCID: PMC10315893 DOI: 10.3762/bjoc.19.72] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/09/2023] [Accepted: 06/15/2023] [Indexed: 07/06/2023] Open
Abstract
The aza-Friedel-Crafts reaction allows an efficient coupling of electron-rich aromatic systems with imines for the facile incorporation of aminoalkyl groups into the aromatic ring. This reaction has a great scope of forming aza-stereocenters which can be tuned by different asymmetric catalysts. This review assembles recent advances in asymmetric aza-Friedel-Crafts reactions mediated by organocatalysts. The mechanistic interpretation with the origin of stereoselectivity is also explained.
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Affiliation(s)
- Anup Biswas
- Department of Chemistry, Hooghly Women’s College, Vivekananda Road, Pipulpati, Hooghly - 712103, WB, India
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19
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Hum G, Phang SJI, Ong HC, León F, Quek S, Khoo YXJ, Li C, Li Y, Clegg JK, Díaz J, Stuparu MC, García F. Main Group Molecular Switches with Swivel Bifurcated to Trifurcated Hydrogen Bond Mode of Action. J Am Chem Soc 2023. [PMID: 37267593 DOI: 10.1021/jacs.2c12713] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
Artificial molecular machines have captured the full attention of the scientific community since Jean-Pierre Sauvage, Fraser Stoddart, and Ben Feringa were awarded the 2016 Nobel Prize in Chemistry. The past and current developments in molecular machinery (rotaxanes, rotors, and switches) primarily rely on organic-based compounds as molecular building blocks for their assembly and future development. In contrast, the main group chemical space has not been traditionally part of the molecular machine domain. The oxidation states and valency ranges within the p-block provide a tremendous wealth of structures with various chemical properties. Such chemical diversity─when implemented in molecular machines─could become a transformative force in the field. Within this context, we have rationally designed a series of NH-bridged acyclic dimeric cyclodiphosphazane species, [(μ-NH){PE(μ-NtBu)2PE(NHtBu)}2] (E = O and S), bis-PV2N2, displaying bimodal bifurcated R21(8) and trifurcated R31(8,8) hydrogen bonding motifs. The reported species reversibly switch their topological arrangement in the presence and absence of anions. Our results underscore these species as versatile building blocks for molecular machines and switches, as well as supramolecular chemistry and crystal engineering based on cyclophosphazane frameworks.
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Affiliation(s)
- Gavin Hum
- School of Chemistry, Chemical Engineering & Biotechnology, Nanyang Technological University, 21 Nanyang Link, 637371 Singapore, Singapore
| | - Si Jia Isabel Phang
- School of Chemistry, Chemical Engineering & Biotechnology, Nanyang Technological University, 21 Nanyang Link, 637371 Singapore, Singapore
| | - How Chee Ong
- School of Chemistry, Chemical Engineering & Biotechnology, Nanyang Technological University, 21 Nanyang Link, 637371 Singapore, Singapore
| | - Felix León
- School of Chemistry, Chemical Engineering & Biotechnology, Nanyang Technological University, 21 Nanyang Link, 637371 Singapore, Singapore
| | - Shina Quek
- School of Chemistry, Chemical Engineering & Biotechnology, Nanyang Technological University, 21 Nanyang Link, 637371 Singapore, Singapore
| | - Yi Xin Joycelyn Khoo
- School of Chemistry, Chemical Engineering & Biotechnology, Nanyang Technological University, 21 Nanyang Link, 637371 Singapore, Singapore
| | - Chenfei Li
- School of Chemistry, Chemical Engineering & Biotechnology, Nanyang Technological University, 21 Nanyang Link, 637371 Singapore, Singapore
| | - Yongxin Li
- School of Chemistry, Chemical Engineering & Biotechnology, Nanyang Technological University, 21 Nanyang Link, 637371 Singapore, Singapore
| | - Jack K Clegg
- School of Chemistry and Molecular Biosciences, The University of Queensland, Cooper Road, St Lucia 4072, Queensland, Australia
| | - Jesús Díaz
- Departamento de Química Orgánica e Inorgánica, Facultad de Veterinaria Extremadura, Avda de la Universidad s/n, Cáceres 10003, Spain
| | - Mihaiela C Stuparu
- School of Chemistry, Chemical Engineering & Biotechnology, Nanyang Technological University, 21 Nanyang Link, 637371 Singapore, Singapore
| | - Felipe García
- Departamento de Química Orgánica e Inorgánica, Facultad de Química, Universidad de Oviedo, Julián Claveria 8, Oviedo 33006, Asturias, Spain
- School of Chemistry, Monash University, Clayton 3800, Victoria, Australia
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20
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Nakanishi T, Terada M. Computational molecular refinement to enhance enantioselectivity by reinforcing hydrogen bonding interactions in major reaction pathway. Chem Sci 2023; 14:5712-5721. [PMID: 37265716 PMCID: PMC10231322 DOI: 10.1039/d3sc01637d] [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: 03/29/2023] [Accepted: 04/29/2023] [Indexed: 06/03/2023] Open
Abstract
Computational analyses have revealed that the distortion of a catalyst and the substrates and their interactions are key to determining the stability of the transition state. Hence, two strategies "distortion strategy" and "interaction strategy" can be proposed for improving enantiomeric excess in enantioselective reactions. The "distortion strategy" is used as a conventional approach that destabilizes the TS (transition state) of the minor pathway. On the other hand, the "interaction strategy" focuses on the stabilization of the TS of the major pathway in which an enhancement of the reaction rate is expected. To realize this strategy, we envisioned the TS stabilization of the major reaction pathway by reinforcing hydrogen bonding and adopted the chiral phosphoric acid-catalysed enantioselective Diels-Alder reaction of 2-vinylquinolines with dienylcarbamates. The intended "interaction strategy" led to remarkable improvements in the enantioselectivity and reaction rate.
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Affiliation(s)
- Taishi Nakanishi
- Department of Chemistry, Graduate School of Science, Tohoku University 6-3 Aramaki Aza Aoba, Aoba-ku Sendai Miyagi 980-8578 Japan
| | - Masahiro Terada
- Department of Chemistry, Graduate School of Science, Tohoku University 6-3 Aramaki Aza Aoba, Aoba-ku Sendai Miyagi 980-8578 Japan
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21
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Fresch E, Collini E. The Role of H-Bonds in the Excited-State Properties of Multichromophoric Systems: Static and Dynamic Aspects. Molecules 2023; 28:molecules28083553. [PMID: 37110786 PMCID: PMC10141795 DOI: 10.3390/molecules28083553] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/14/2023] [Revised: 04/12/2023] [Accepted: 04/15/2023] [Indexed: 04/29/2023] Open
Abstract
Given their importance, hydrogen bonds (H-bonds) have been the subject of intense investigation since their discovery. Indeed, H-bonds play a fundamental role in determining the structure, the electronic properties, and the dynamics of complex systems, including biologically relevant materials such as DNA and proteins. While H-bonds have been largely investigated for systems in their electronic ground state, fewer studies have focused on how the presence of H-bonds could affect the static and dynamic properties of electronic excited states. This review presents an overview of the more relevant progress in studying the role of H-bond interactions in modulating excited-state features in multichromophoric biomimetic complex systems. The most promising spectroscopic techniques that can be used for investigating the H-bond effects in excited states and for characterizing the ultrafast processes associated with their dynamics are briefly summarized. Then, experimental insights into the modulation of the electronic properties resulting from the presence of H-bond interactions are provided, and the role of the H-bond in tuning the excited-state dynamics and the related photophysical processes is discussed.
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Affiliation(s)
- Elisa Fresch
- Department of Chemical Sciences, University of Padova, Via Marzolo 1, 35131 Padova, Italy
| | - Elisabetta Collini
- Department of Chemical Sciences, University of Padova, Via Marzolo 1, 35131 Padova, Italy
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22
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Yeo HM, Kim TH. Chiral Proline Amide‐Isothiouronium Salt Spaced with Diamine as an Efficient Bifunctional Organocatalyst for Enantioselective α‐Hydrazination of Aldehydes. ChemistrySelect 2023. [DOI: 10.1002/slct.202300060] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/07/2023]
Affiliation(s)
- Hyoung Min Yeo
- School of Chemical Engineering College of Engineering Chonnam National University Gwangju 61186 Republic of Korea
| | - Take Hyeon Kim
- School of Chemical Engineering College of Engineering Chonnam National University Gwangju 61186 Republic of Korea
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23
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Hayashi M, Burtoloso ACB. Organocatalytic Transformations from Sulfur Ylides. Catalysts 2023. [DOI: 10.3390/catal13040689] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/05/2023] Open
Abstract
Sulfur ylides are an important class of organic compounds due to their ability to perform many different transformations that can give diverse and interesting products with a high degree of complexity. Although metal-catalyzed transformations are frequent in this class of compounds, organocatalyzed transformations remain scarce. From initial works, this review aims to show organocatalyzed transformations from sulfur ylides, involving cyclopropanation and formal N–H, S–H, and C–H insertion reactions, including enantioselective versions. The proposed mechanisms and the modes of activation of these organocatalysts will be covered. Furthermore, advances in this area and potential challenges to be circumvented in the near future will also be discussed.
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Affiliation(s)
- Marcio Hayashi
- São Carlos Institute of Chemistry, University of São Paulo, São Carlos 13563-120, Brazil
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24
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Qiu Q, Sun Z, Joubran D, Li X, Wan J, Schmidt-Rohr K, Han GGD. Optically Controlled Recovery and Recycling of Homogeneous Organocatalysts Enabled by Photoswitches. Angew Chem Int Ed Engl 2023; 62:e202300723. [PMID: 36688731 DOI: 10.1002/anie.202300723] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/14/2023] [Revised: 01/22/2023] [Accepted: 01/23/2023] [Indexed: 01/24/2023]
Abstract
We address a critical challenge of recovering and recycling homogeneous organocatalysts by designing photoswitchable catalyst structures that display a reversible solubility change in response to light. Initially insoluble catalysts are UV-switched to a soluble isomeric state, which catalyzes the reaction, then back-isomerizes to the insoluble state upon completion of the reaction to be filtered and recycled. The molecular design principles that allow for the drastic solubility change over 10 times between the isomeric states, 87 % recovery by the light-induced precipitation, and multiple rounds of catalyst recycling are revealed. This proof of concept will open up opportunities to develop highly recyclable homogeneous catalysts that are important for the synthesis of critical compounds in various industries, which is anticipated to significantly reduce environmental impact and costs.
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Affiliation(s)
- Qianfeng Qiu
- Department of Chemistry, Brandeis University, 415 South Street, Waltham, MA 02453, USA
| | - Zhenhuan Sun
- Department of Chemistry, Brandeis University, 415 South Street, Waltham, MA 02453, USA
| | - Danielle Joubran
- Department of Chemistry, Brandeis University, 415 South Street, Waltham, MA 02453, USA
| | - Xiang Li
- Department of Chemistry, Brandeis University, 415 South Street, Waltham, MA 02453, USA
| | - Joshua Wan
- Department of Chemistry, Brandeis University, 415 South Street, Waltham, MA 02453, USA
| | - Klaus Schmidt-Rohr
- Department of Chemistry, Brandeis University, 415 South Street, Waltham, MA 02453, USA
| | - Grace G D Han
- Department of Chemistry, Brandeis University, 415 South Street, Waltham, MA 02453, USA
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25
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Busch J, Kotwica D, Al Sheakh L, Headen T, Youngs TGA, Paschek D, Ludwig R. Quantification and Distribution of Three Types of Hydrogen Bonds in Mixtures of an Ionic Liquid with the Hydrogen-Bond-Accepting Molecular Solvent DMSO Explored by Neutron Diffraction and Molecular Dynamics Simulations. J Phys Chem Lett 2023; 14:2684-2691. [PMID: 36892277 DOI: 10.1021/acs.jpclett.3c00018] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/18/2023]
Abstract
The concept of hydrogen bonding is celebrating its 100th birthday. Hydrogen bonds (H-bonds) play a key role in the structure and function of biological molecules, the strength of materials, and molecular binding. Herein, we study H-bonding in mixtures of a hydroxyl-functionalized ionic liquid with the neutral, H-bond-accepting molecular liquid dimethylsulfoxide (DMSO) using neutron diffraction experiments and molecular dynamics simulations. We report the geometry, strength, and distribution of three different types of H-bond OH···O, formed between the hydroxyl group of the cation and either the oxygen atom of another cation, the counteranion, or the neutral molecule. Such a variety of different strengths and distributions of H-bonds in one single mixture could hold the promise of providing solvents with potential applications in H-bond-related chemistry, for example, to alter the natural selectivity patterns of catalytic reactions or the conformation of catalysts.
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Affiliation(s)
- Johanna Busch
- Institut für Chemie, Abteilung Physikalische und Theoretische Chemie, Universität Rostock, Albert-Einstein-Str. 27, 18059 Rostock, Germany
| | - David Kotwica
- Institut für Chemie, Abteilung Physikalische und Theoretische Chemie, Universität Rostock, Albert-Einstein-Str. 27, 18059 Rostock, Germany
| | - Loai Al Sheakh
- Institut für Chemie, Abteilung Physikalische und Theoretische Chemie, Universität Rostock, Albert-Einstein-Str. 27, 18059 Rostock, Germany
| | - Thomas Headen
- ISIS Faculty, STFC, Rutherford Appleton Laboratory, Didcot OX11 0QX, United Kingdom
| | - Tristan G A Youngs
- ISIS Faculty, STFC, Rutherford Appleton Laboratory, Didcot OX11 0QX, United Kingdom
| | - Dietmar Paschek
- Institut für Chemie, Abteilung Physikalische und Theoretische Chemie, Universität Rostock, Albert-Einstein-Str. 27, 18059 Rostock, Germany
| | - Ralf Ludwig
- Institut für Chemie, Abteilung Physikalische und Theoretische Chemie, Universität Rostock, Albert-Einstein-Str. 27, 18059 Rostock, Germany
- Department LL&M, Universität Rostock, Albert-Einstein-Str. 25, 18059 Rostock, Germany
- Leibniz-Institut für Katalyse an der Universität Rostock e.V., Albert-Einstein-Str. 29a, 18059 Rostock, Germany
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26
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Liu H, Liu H, Wang E, Li L, Luo Z, Cao J, Chen J, Yang L, Yang X. Hydrogen Bond Assisted Three-Component Tandem Reactions to Access N-Alkyl-4-Quinolones. Molecules 2023; 28:molecules28052304. [PMID: 36903552 PMCID: PMC10005641 DOI: 10.3390/molecules28052304] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/07/2023] [Revised: 02/15/2023] [Accepted: 02/21/2023] [Indexed: 03/06/2023] Open
Abstract
Hydrogen-bonding catalytic reactions have gained great interest. Herein, a hydrogen-bond-assisted three-component tandem reaction for the efficient synthesis of N-alkyl-4-quinolones is described. This novel strategy features the first proof of polyphosphate ester (PPE) as a dual hydrogen-bonding catalyst and the use of readily available starting materials for the preparation of N-alkyl-4-quinolones. The method provides a diversity of N-alkyl-4-quinolones in moderate to good yields. The compound 4h demonstrated good neuroprotective activity against N-methyl-ᴅ-aspartate (NMDA)-induced excitotoxicity in PC12 cells.
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Affiliation(s)
- Huanhuan Liu
- State Key Laboratory of Functions and Applications of Medicinal Plants, Guizhou Medical University, Guiyang 550014, China
- The Key Laboratory of Chemistry for Natural Products of Guizhou Province and Chinese Academy of Sciences, Guiyang 550014, China
| | - Huadan Liu
- State Key Laboratory of Functions and Applications of Medicinal Plants, Guizhou Medical University, Guiyang 550014, China
- The Key Laboratory of Chemistry for Natural Products of Guizhou Province and Chinese Academy of Sciences, Guiyang 550014, China
| | - Enhua Wang
- Department of Food and Medicine, Guizhou Vocational College of Agriculture, Qingzhen 551400, China
| | - Liangqun Li
- State Key Laboratory of Functions and Applications of Medicinal Plants, Guizhou Medical University, Guiyang 550014, China
- The Key Laboratory of Chemistry for Natural Products of Guizhou Province and Chinese Academy of Sciences, Guiyang 550014, China
| | - Zhongsheng Luo
- State Key Laboratory of Functions and Applications of Medicinal Plants, Guizhou Medical University, Guiyang 550014, China
- The Key Laboratory of Chemistry for Natural Products of Guizhou Province and Chinese Academy of Sciences, Guiyang 550014, China
| | - Jiafu Cao
- State Key Laboratory of Functions and Applications of Medicinal Plants, Guizhou Medical University, Guiyang 550014, China
- The Key Laboratory of Chemistry for Natural Products of Guizhou Province and Chinese Academy of Sciences, Guiyang 550014, China
| | - Jialin Chen
- State Key Laboratory of Functions and Applications of Medicinal Plants, Guizhou Medical University, Guiyang 550014, China
- The Key Laboratory of Chemistry for Natural Products of Guizhou Province and Chinese Academy of Sciences, Guiyang 550014, China
| | - Lishou Yang
- State Key Laboratory of Functions and Applications of Medicinal Plants, Guizhou Medical University, Guiyang 550014, China
- The Key Laboratory of Chemistry for Natural Products of Guizhou Province and Chinese Academy of Sciences, Guiyang 550014, China
- Correspondence: (L.Y.); (X.Y.)
| | - Xiaosheng Yang
- State Key Laboratory of Functions and Applications of Medicinal Plants, Guizhou Medical University, Guiyang 550014, China
- The Key Laboratory of Chemistry for Natural Products of Guizhou Province and Chinese Academy of Sciences, Guiyang 550014, China
- Correspondence: (L.Y.); (X.Y.)
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27
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Mechanistic insight into the photocatalytic N-alkylation of piperazine with alcohols over TiO2 supported Pd catalysts. MOLECULAR CATALYSIS 2023. [DOI: 10.1016/j.mcat.2023.112993] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/10/2023]
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28
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Zhang J, Shao Y, Zheng H, Xue XS. Transition State Stabilization by SCF 2 -H⋅⋅⋅O Bifurcated Hydrogen Bond. Chem Asian J 2023; 18:e202201244. [PMID: 36635229 DOI: 10.1002/asia.202201244] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/14/2022] [Revised: 01/10/2023] [Accepted: 01/12/2023] [Indexed: 01/14/2023]
Abstract
The difluoromethylthio group (SCF2 H), which is generally considered a highly lipophilic weak hydrogen bonding donor, has attracted special interest from the pharmaceutical and agrochemical industry. Remarkably, there have been relatively few literature investigations of SCF2 H hydrogen bonding interactions. Here, we report the determination of the hydrogen bond acidity parameter A of the SCF2 H in the most popularly used electrophilic difluoromethylthiolating reagent. We present kinetic and computational evidence of the RSCF2 -H⋅⋅⋅O2 bifurcated hydrogen bond for stabilizing the SCF2 H-transferring transition state, which could cause a reversal of apparent electrophilic reactivity of difluoromethylthiolating and trifluoromethylthiolating reagents. Solvent effects on the RSCF2 -H⋅⋅⋅O2 bifurcated hydrogen bonds will also be discussed.
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Affiliation(s)
- Jingjing Zhang
- Center of Basic Molecular Science, Department of Chemistry, Tsinghua University, Beijing, 100084, China
| | - Yingbo Shao
- College of Chemistry, Nankai University, Tianjin, 300071, P. R. China
| | - Hanliang Zheng
- College of Chemistry, Nankai University, Tianjin, 300071, P. R. China
| | - Xiao-Song Xue
- College of Chemistry, Nankai University, Tianjin, 300071, P. R. China.,Key Laboratory of Organofluorine Chemistry, Shanghai Institute of Organic Chemistry, University of Chinese Academy of Sciences Chinese Academy of Sciences, 345 Lingling Road, Shanghai, 200032, P. R. China.,School of Chemistry and Materials Science, Hangzhou Institute for Advanced Study, University of Chinese Academy of Sciences, 1 Sub-lane Xiangshan, Hangzhou, 310024, P. R. China
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29
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Xu D, Chang Y, Liu Y, Qin W, Yan H. Mechanistic Features of Asymmetric Vinylidene ortho-Quinone Methide Construction and Subsequent Transformations. ACS Catal 2023. [DOI: 10.1021/acscatal.2c06272] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/16/2023]
Affiliation(s)
- Da Xu
- Chongqing Key Laboratory of Natural Product Synthesis and Drug Research, School of Pharmaceutical Sciences, Chongqing University, Chongqing 401331, P. R. China
| | - Yu Chang
- Chongqing Key Laboratory of Natural Product Synthesis and Drug Research, School of Pharmaceutical Sciences, Chongqing University, Chongqing 401331, P. R. China
| | - Yidong Liu
- Chongqing Key Laboratory of Natural Product Synthesis and Drug Research, School of Pharmaceutical Sciences, Chongqing University, Chongqing 401331, P. R. China
| | - Wenling Qin
- Chongqing Key Laboratory of Natural Product Synthesis and Drug Research, School of Pharmaceutical Sciences, Chongqing University, Chongqing 401331, P. R. China
| | - Hailong Yan
- Chongqing Key Laboratory of Natural Product Synthesis and Drug Research, School of Pharmaceutical Sciences, Chongqing University, Chongqing 401331, P. R. China
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30
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Lonardi G, Parolin R, Licini G, Orlandi M. Catalytic Asymmetric Conjugate Reduction. Angew Chem Int Ed Engl 2023; 62:e202216649. [PMID: 36757599 DOI: 10.1002/anie.202216649] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/11/2022] [Revised: 01/16/2023] [Accepted: 02/09/2023] [Indexed: 02/10/2023]
Abstract
Enantioselective reduction reactions are privileged transformations for the construction of trisubstituted stereogenic centers. While these include established synthetic strategies, such as asymmetric hydrogenation, methods based on the enantioselective addition of hydridic reagents to electrophilic prochiral substrates have also gained importance. In this context, the asymmetric conjugate reduction (ACR) of α,β-unsaturated compounds has become a convenient approach for the synthesis of chiral compounds with trisubstituted stereocenters in α-, β-, or γ-position to electron-withdrawing functional groups. Because such activating groups are diverse and amenable of further derivatizations, ACRs provide a general and powerful synthetic entry towards a variety of valuable chiral building blocks. This Review provides a comprehensive collection of catalytic ACR methods involving transition-metal, organic, and enzymatic catalysis since its first versions dating back to the late 1970s.
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Affiliation(s)
- Giovanni Lonardi
- Department of Chemical Sciences, University of Padova, Via Marzolo, 1, 35131, Padova, Italy
| | - Riccardo Parolin
- Department of Chemical Sciences, University of Padova, Via Marzolo, 1, 35131, Padova, Italy
| | - Giulia Licini
- Department of Chemical Sciences, University of Padova, Via Marzolo, 1, 35131, Padova, Italy
| | - Manuel Orlandi
- Department of Chemical Sciences, University of Padova, Via Marzolo, 1, 35131, Padova, Italy
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31
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Nomura M, Begum Z, Seki C, Okuyama Y, Kwon E, Uwai K, Tokiwa M, Tokiwa S, Takeshita M, Nakano H. Thiourea fused γ-amino alcohol organocatalysts for asymmetric Mannich reaction of β-keto active methylene compounds with imines. RSC Adv 2023; 13:3715-3722. [PMID: 36756606 PMCID: PMC9891089 DOI: 10.1039/d2ra08317e] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/30/2022] [Accepted: 01/18/2023] [Indexed: 01/27/2023] Open
Abstract
Catalytic functionality of new optically active thiourea fused γ-amino alcohols was examined in the asymmetric Mannich reaction of β-keto active methylene compounds with imines to afford chiral Mannich products, β-amino keto compounds, with continuous chiral centers, that are versatile synthetic intermediates for deriving various biologically active compounds. In particular, the thiourea fused γ-amino alcohols showed satisfactory catalytic activity in this reaction and afforded chiral Mannich products in excellent chemical yield (up to 88%) and stereoselectivities (up to syn : anti/93 : 7 dr, up to 99% ee).
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Affiliation(s)
- Miku Nomura
- Division of Sustainable and Environmental Engineering, Graduate School of Engineering, Muroran Institute of Technology 27-1 Mizumoto-cho Muroran 050-8585 Japan
| | - Zubeda Begum
- Division of Sustainable and Environmental Engineering, Graduate School of Engineering, Muroran Institute of Technology 27-1 Mizumoto-cho Muroran 050-8585 Japan
| | - Chigusa Seki
- Division of Sustainable and Environmental Engineering, Graduate School of Engineering, Muroran Institute of Technology 27-1 Mizumoto-cho Muroran 050-8585 Japan
| | - Yuko Okuyama
- Division of Sustainable and Environmental Engineering, Graduate School of Engineering, Muroran Institute of Technology 27-1 Mizumoto-cho Muroran 050-8585 Japan .,Tohoku Medical and Pharmaceutical University 4-4-1 Komatsushima, Aoba-Ku Sendai 981-8558 Japan
| | - Eunsang Kwon
- Research and Analytical Center for Giant Molecules, Graduate School of Sciences, Tohoku Medical and Pharmaceutical University4-4-1 Komatsushima, Aoba-KuSendai 981-8558Japan
| | - Koji Uwai
- Division of Sustainable and Environmental Engineering, Graduate School of Engineering, Muroran Institute of Technology 27-1 Mizumoto-cho Muroran 050-8585 Japan
| | - Michio Tokiwa
- Tokiwakai Group62 Numajiri Tsuduri-Chou UchigoIwaki 973-8053Japan
| | - Suguru Tokiwa
- Tokiwakai Group62 Numajiri Tsuduri-Chou UchigoIwaki 973-8053Japan
| | | | - Hiroto Nakano
- Division of Sustainable and Environmental Engineering, Graduate School of Engineering, Muroran Institute of Technology 27-1 Mizumoto-cho Muroran 050-8585 Japan
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32
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Biswas A. Organocatalyzed Asymmetric Pictet‐Spengler Reactions. ChemistrySelect 2023. [DOI: 10.1002/slct.202203368] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
Affiliation(s)
- Anup Biswas
- Departmentof Chemistry Hooghly Women's College Vivekanada Road, Pipulpati Hooghly 712102 India
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33
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Heuer J, Kuckhoff T, Li R, Landfester K, Ferguson CTJ. Tunable Photocatalytic Selectivity by Altering the Active Center Microenvironment of an Organic Polymer Photocatalyst. ACS APPLIED MATERIALS & INTERFACES 2023; 15:2891-2900. [PMID: 36594942 PMCID: PMC9869337 DOI: 10.1021/acsami.2c17607] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 09/29/2022] [Accepted: 12/15/2022] [Indexed: 06/17/2023]
Abstract
The favored production of one product over another is a major challenge in synthetic chemistry, reducing the formation of byproducts and enhancing atom efficacy. The formation of catalytic species that have differing reactivities based on the substrate being converted, has been targeted to selectively control reactions. Here, we report the production of photocatalytic self-assembled amphiphilic polymers, with either hydrophilic or hydrophobic microenvironments at the reactive center. Benzothiadiazole-based photocatalysts were polymerized into either the hydrophilic or the hydrophobic compartment of a diblock copolymer by RAFT polymerization. The difference in the reactivity of each microenvironment was dictated by the physical properties of the substrate. Stark differences in reactivity were observed for polar substrates, where a hydrophilic microenvironment was favored. Conversely, both microenvironments performed similarly for very hydrophobic substrates, showing that reagent partitioning is not the only factor that drives photocatalytic conversion. Furthermore, the use of secondary swelling solvents allowed an additional reagent exchange between the continuous phase and the heterogeneous photocatalyst, resulting in a significant 5-fold increase in conversion for a radical carbon-carbon coupling.
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Affiliation(s)
- Julian Heuer
- Max
Planck Institute for Polymer Research, Ackermannweg 10, Mainz55128, Germany
| | - Thomas Kuckhoff
- Max
Planck Institute for Polymer Research, Ackermannweg 10, Mainz55128, Germany
| | - Rong Li
- Max
Planck Institute for Polymer Research, Ackermannweg 10, Mainz55128, Germany
| | | | - Calum T. J. Ferguson
- Max
Planck Institute for Polymer Research, Ackermannweg 10, Mainz55128, Germany
- School
of Chemistry, University of Birmingham, Edgbaston, BirminghamB15 2TT, United
Kingdom
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34
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Singh M, Neogi S. Largely Entangled Diamondoid Framework with High-Density Urea and Divergent Metal Nodes for Selective Scavenging of CO 2 and Molecular Dimension-Mediated Size-Exclusive H-Bond Donor Catalysis. Inorg Chem 2023; 62:871-884. [PMID: 36580539 DOI: 10.1021/acs.inorgchem.2c03684] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Abstract
Pore environment modulation with high-density polarizing groups in metal-organic frameworks (MOFs) can effectively accomplish selective and multicyclic carbon dioxide (CO2) adsorption, whereas the incorporation of task-specific organic sites inside these porous vessels promise to evade self-quenching, solubility, and recyclability issues in hydrogen-bond donating (HBD) catalysis. However, concurrent amalgamation of both these attributes over a single platform is rare but extremely demanding in view of sustainable applications. We designed a robust diamondoid framework CSMCRI-17 (CSMCRI = Central Salt and Marine Chemicals Research Institute) from the mixed-ligand assembly of azo group-containing dicarboxylate ligand, urea-functionalized pyridyl linker, and Zn(II) nodes with specific divergent coordination. Seven-fold interpenetration to the microporous structure largely augments N-rich functionality that facilitates high CO2 uptake in the activated form (17a) with good CO2 selectivity over N2 and CH4 that outperform many reported materials. The framework displays very strong CO2 affinity and no reduction in adsorption capacity over multiple uptake-release cycles. Benefitting from the pore-wall decoration with urea functionality from the pillaring strut, 17a further demonstrates hydrogen-bond-mediated Friedel-Crafts alkylation of indole with β-nitrostyrene under mild conditions, with multicyclic usability and excellent reactivity toward wide ranges of substituted nucleophiles and electrophiles. Interestingly, interpenetration-generated optimum-sized pores induce poor conversion to sterically encumbered substrate via molecular dimension-mediated size selectivity that is alternatively ascribed from additional control experiments and support the occurrence of HBD reaction within the MOF cavity. The catalytic path is detailed in light of the change of emission intensity of the framework by the electrophile as well as the judicious choice of the substrate, which authenticates the prime role of urea moiety-governed two-point hydrogen bonding.
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Affiliation(s)
- Manpreet Singh
- Inorganic Materials & Catalysis Division, CSIR-Central Salt and Marine Chemicals Research Institute (CSIR-CSMCRI), Bhavnagar, Gujarat 364002, India.,Academy of Scientific and Innovative Research (AcSIR), Ghaziabad-201002, India
| | - Subhadip Neogi
- Inorganic Materials & Catalysis Division, CSIR-Central Salt and Marine Chemicals Research Institute (CSIR-CSMCRI), Bhavnagar, Gujarat 364002, India.,Academy of Scientific and Innovative Research (AcSIR), Ghaziabad-201002, India
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35
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Robidas R, Reinhard DL, Huber SM, Legault CY. A Quantum-chemical Analysis on the Lewis Acidity of Diarylhalonium Ions. Chemphyschem 2023; 24:e202200634. [PMID: 36043491 PMCID: PMC10092059 DOI: 10.1002/cphc.202200634] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/24/2022] [Revised: 08/30/2022] [Indexed: 01/07/2023]
Abstract
Cyclic diaryliodonium compounds like iodolium derivatives have increasingly found use as noncovalent Lewis acids in the last years. They are more stable toward nucleophilic substitution than acyclic systems and are markedly more Lewis acidic. Herein, this higher Lewis acidity is analyzed and explained via quantum-chemical calculations and energy decomposition analyses. Its key origin is the change in energy levels and hybridization of iodine's orbitals, leading to both more favorable electrostatic interaction and better charge transfer. Both of the latter seem to contribute in similar fashion, while hydrogen bonding as well as steric repulsion with the phenyl rings play at best a minor role. In comparison to iodolium, bromolium and chlorolium are less Lewis acidic the lighter the halogen, which is predominantly based on less favorable charge-transfer interactions.
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Affiliation(s)
- Raphaël Robidas
- Department of Chemistry, Université de Sherbrooke, Centre in Green Chemistry and Catalysis, J1K 2R1, Sherbrooke, Québec, Canada
| | - Dominik L Reinhard
- Fakultät für Chemie und Biochemie, Organische Chemie I, Ruhr-Universität Bochum, Universitätsstraße 150, 44801, Bochum, Germany
| | - Stefan M Huber
- Fakultät für Chemie und Biochemie, Organische Chemie I, Ruhr-Universität Bochum, Universitätsstraße 150, 44801, Bochum, Germany
| | - Claude Y Legault
- Department of Chemistry, Université de Sherbrooke, Centre in Green Chemistry and Catalysis, J1K 2R1, Sherbrooke, Québec, Canada
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36
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Reyes E, Prieto L, Milelli A. Asymmetric Organocatalysis: A Survival Guide to Medicinal Chemists. Molecules 2022; 28:271. [PMID: 36615465 PMCID: PMC9822454 DOI: 10.3390/molecules28010271] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/22/2022] [Revised: 12/16/2022] [Accepted: 12/21/2022] [Indexed: 12/30/2022] Open
Abstract
Majority of drugs act by interacting with chiral counterparts, e.g., proteins, and we are, unfortunately, well-aware of how chirality can negatively impact the outcome of a therapeutic regime. The number of chiral, non-racemic drugs on the market is increasing, and it is becoming ever more important to prepare these compounds in a safe, economic, and environmentally sustainable fashion. Asymmetric organocatalysis has a long history, but it began its renaissance era only during the first years of the millennium. Since then, this field has reached an extraordinary level, as confirmed by the awarding of the 2021 Chemistry Nobel Prize. In the present review, we wish to highlight the application of organocatalysis in the synthesis of enantio-enriched molecules that may be of interest to the pharmaceutical industry and the medicinal chemistry community. We aim to discuss the different activation modes observed for organocatalysts, examining, for each of them, the generally accepted mechanisms and the most important and developed reactions, that may be useful to medicinal chemists. For each of these types of organocatalytic activations, select examples from academic and industrial applications will be disclosed during the synthesis of drugs and natural products.
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Affiliation(s)
- Efraim Reyes
- Department of Organic and Inorganic Chemistry, University of the Basque Country (UPV/EHU), 48080 Bilbao, Spain
| | - Liher Prieto
- Department of Organic and Inorganic Chemistry, University of the Basque Country (UPV/EHU), 48080 Bilbao, Spain
| | - Andrea Milelli
- Department for Life Quality Studies, Alma Mater Studiorum-University of Bologna, Corso d’Augusto 237, 47921 Rimini, Italy
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37
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Pal P, Chakraborty S, Jana B. Number of Hydrogen Bonds per Unit Solvent Accessible Surface Area: A Descriptor of Functional States of Proteins. J Phys Chem B 2022; 126:10822-10833. [PMID: 36524238 DOI: 10.1021/acs.jpcb.2c05367] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
Proteins function close to native and near-native conformations. These states are evolutionarily selected to ensure the effect of mutations is minimized. The structural organization of a protein is hierarchical and modular, which reduces the dimensionality of the configurational space of the native states. Thus, finding appropriate descriptors that define the native state among all possible states of a protein is a problem of immense interest. The present study explores the correlation between solvent accessible surface areas (SASAs) and different intraprotein as well as protein-water hydrogen bonds of 55 single-chain globular proteins from four different structural classes (all α, all β, α+β, and α/β), 16 multichain proteins, and 4 macromolecular complexes. A systematic analysis of the solvent accessible surface area and intraprotein and protein-water hydrogen bonds suggests a linear relationship between SASAs and hydrogen bonds. The number of protein-water hydrogen bonds per unit SASA ranges from 3 to 4 for all the different structural protein classes. In contrast, the number of intramolecular hydrogen bonds per unit SASA, including the mainchain-mainchain, mainchain-sidechain, and sidechain-sidechain, varies between 0.75 to 2. The solvation free energy of a protein linearly decreases with SASA. Our study also shows that the solvation free energy/SASA varies from -75 to -105 kJ mol-1 nm-2 across all the native states studied here. The number conservancy of intraprotein hydrogen bonds per unit SASA possibly imparts structural stability to the native structure. On the other hand, 3-4 protein-water hydrogen bonds per unit SASA are possibly required to maintain a balance between the solubility and functionality of the native states. This study provides a basis for synthetic biologists to design new folds with improved functionality.
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Affiliation(s)
- Prasun Pal
- School of Chemical Sciences, Indian Association for the Cultivation of Science, Jadavpur, Kolkata 700032, India
| | - Sandipan Chakraborty
- Center for Innovation in Molecular and Pharmaceutical Sciences (CIMPS), Dr. Reddy's Institute of Life Sciences, University of Hyderabad Campus, Gachibowli, Hyderabad 500046, India
| | - Biman Jana
- School of Chemical Sciences, Indian Association for the Cultivation of Science, Jadavpur, Kolkata 700032, India
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38
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Mo Y, Chen Q, Li J, Ye D, Zhou Y, Dong S, Liu X, Feng X. Asymmetric Catalytic Conjugate Addition of Cyanide to Chromones and β-Substituted Cyclohexenones. ACS Catal 2022. [DOI: 10.1021/acscatal.2c05509] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Affiliation(s)
- Yuhao Mo
- Key Laboratory of Green Chemistry & Technology, Ministry of Education, College of Chemistry, Sichuan University, Chengdu 610064, China
| | - Qiyou Chen
- Key Laboratory of Green Chemistry & Technology, Ministry of Education, College of Chemistry, Sichuan University, Chengdu 610064, China
| | - Jinzhao Li
- Key Laboratory of Green Chemistry & Technology, Ministry of Education, College of Chemistry, Sichuan University, Chengdu 610064, China
| | - Dong Ye
- Key Laboratory of Green Chemistry & Technology, Ministry of Education, College of Chemistry, Sichuan University, Chengdu 610064, China
| | - Yuqiao Zhou
- Key Laboratory of Green Chemistry & Technology, Ministry of Education, College of Chemistry, Sichuan University, Chengdu 610064, China
| | - Shunxi Dong
- Key Laboratory of Green Chemistry & Technology, Ministry of Education, College of Chemistry, Sichuan University, Chengdu 610064, China
| | - Xiaohua Liu
- Key Laboratory of Green Chemistry & Technology, Ministry of Education, College of Chemistry, Sichuan University, Chengdu 610064, China
| | - Xiaoming Feng
- Key Laboratory of Green Chemistry & Technology, Ministry of Education, College of Chemistry, Sichuan University, Chengdu 610064, China
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39
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Samha MH, Wahlman JLH, Read JA, Werth J, Jacobsen EN, Sigman MS. Exploring Structure-Function Relationships of Aryl Pyrrolidine-Based Hydrogen-Bond Donors in Asymmetric Catalysis Using Data-Driven Techniques. ACS Catal 2022; 12:14836-14845. [PMID: 36816226 PMCID: PMC9937582 DOI: 10.1021/acscatal.2c04824] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
Hydrogen bond-based organocatalysts rely on networks of attractive noncovalent interactions (NCIs) to impart enantioselectivity. As a specific example, aryl pyrrolidine substituted urea, thiourea, and squaramide organocatalysts function cooperatively through hydrogen bonding and difficult-to-predict NCIs as a function of the reaction partners. To uncover the synergistic effect of the structural components of this catalyst class, we applied data science tools to study various model reactions using a derivatized, aryl pyrrolidine-based, hydrogen-bond donor (HBD) catalyst library. Through a combination of experimentally collected data and data mined from previous reports, statistical models were constructed, illuminating the general features necessary for high enantioselectivity. A distinct dependence on the identity of the electrophilic reaction partner and HBD catalyst is observed, suggesting that a general interaction is conserved throughout the reactions analyzed. The resulting models also demonstrate predictive capability by the successful improvement of a previously reported reaction using out-of-sample reaction components. Overall, this study highlights the power of data science in exploring mechanistic hypotheses in asymmetric HBD catalysis and provides a prediction platform applicable in future reaction optimization.
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Affiliation(s)
- Mohammad H. Samha
- Department of Chemistry, University of Utah, Salt Lake City, Utah 84112, United States
| | - Julie L. H. Wahlman
- Department of Chemistry, University of Utah, Salt Lake City, Utah 84112, United States
| | - Jacquelyne A. Read
- Department of Chemistry and Chemical Biology, Harvard University, Cambridge, Massachusetts 02138, United States; Department of Chemistry, University of Utah, Salt Lake City, Utah 84112, United States
| | - Jacob Werth
- Department of Chemistry, University of Utah, Salt Lake City, Utah 84112, United States
| | - Eric N. Jacobsen
- Department of Chemistry and Chemical Biology, Harvard University, Cambridge, Massachusetts 02138, United States
| | - Matthew S. Sigman
- Department of Chemistry, University of Utah, Salt Lake City, Utah 84112, United States
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40
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Zhu X, Zhang C, Ma H, Lu F. Stereo-Recognition of Hydrogen Bond and Its Implications for Lignin Biomimetic Synthesis. Biomacromolecules 2022; 23:4985-4994. [PMID: 36332059 DOI: 10.1021/acs.biomac.2c00609] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Abstract
The hydrogen bond (H-bond) is essential to stabilizing the three-dimensional biological structure such as protein, cellulose, and lignin, which are integral parts of animal and plant cells; thus, stereo-recognition of the H-bond is extremely attractive. Herein, a methodology combining the variable-temperature 1H NMR technique with the density functional theory was established to recognize the underlying H-bonding patterns in lignin diastereomers. This method successfully classified the intramolecular and intermolecular H-bonds with slope values varying between 50.2-201.5 and 221.9-655.4, respectively, from the natural logarithm of the hydroxyl proton chemical shift versus the inverse of the temperature plot. Moreover, this slope was found to be correlated with the interaction distance between the H-bond donor and acceptor. Finally, it was proposed that the stereo-preferential formation of the β-O-4 structure (erythro vs threo form) during lignin biomimetic synthesis was probably influenced by their intramolecular H-bonding patterns, thus making it easier to reach thermodynamic equilibrium.
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Affiliation(s)
- Xuhai Zhu
- State Key Laboratory of Catalysis, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian, Liaoning110623, P. R. China
| | - Cong Zhang
- School of Chemical Engineering, Xi'an Key Laboratory of Special Energy Materials, Northwest University, Xi'an, Shanxi710069, P. R. China
| | - Haixia Ma
- School of Chemical Engineering, Xi'an Key Laboratory of Special Energy Materials, Northwest University, Xi'an, Shanxi710069, P. R. China
| | - Fang Lu
- State Key Laboratory of Catalysis, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian, Liaoning110623, P. R. China
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41
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Malakar CC, Dell'Amico L, Zhang W. Dual Catalysis in Organic Synthesis: Current Challenges and New Trends. European J Org Chem 2022. [DOI: 10.1002/ejoc.202201114] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Affiliation(s)
- Chandi C. Malakar
- Department of Chemistry National Institute of Technology Manipur Langol Imphal 795004 Manipur India
| | - Luca Dell'Amico
- Department of Chemical Sciences University of Padova Via Marzolo 1 35131 Padova Italy
| | - Wanbin Zhang
- Shanghai Key Laboratory for Molecular Engineering of Chiral Drugs School of Chemistry and Chemical Engineering Shanghai Jiao Tong University 800 Dongchuan Road Shanghai 200240 China
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42
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Shaik S, Reddy Sirigireddy RM, Godugu K, Vemula V, Kakarla RR, Balaraman E, Nallagondu CGR, Aminabhavi TM. SiO 2-supported HClO 4 catalyzed synthesis of (Z)-thiazolylhydrazonoindolin-2-ones and their electrochemical properties. CHEMOSPHERE 2022; 309:136667. [PMID: 36202369 DOI: 10.1016/j.chemosphere.2022.136667] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/18/2022] [Revised: 09/14/2022] [Accepted: 09/27/2022] [Indexed: 06/16/2023]
Abstract
In this paper, an environmentally benign silica-supported perchloric acid (HClO4-SiO2) catalyzed green FCDR strategy has been developed for the synthesis of (Z)-THIs (6) with high stereospecificity via an intramolecular hydrogen bond (IHB) directed approach, involving the reaction of methyl ketones (1), N-bromosuccinimide (NBS) (2), isatins (4) and thiosemicarbazide (5) in ethanol at reflux temperature for 45-60 min in one-pot. The reaction proceeds through the construction of C-Br (α-bromination), C-S & C-N (heterocyclization), and CN (condensation) bonds in one pot. The absolute structure of the compound (Z)-3-(2-(4-(4-bromophenyl)thiazol-2-yl)hydrazono)indolin-2-one (6e) has been confirmed by single-crystal XRD analysis. Further, the role of IHB on Z-configuration of the synthesized (Z)-THIs is proved by single-crystal XRD and 1H NMR studies. Wide substrate scope, good functional group tolerance, scalability, improved safety since the method circumvents the use of highly lachrymatric α-bromoketones as starting materials, high product yields (up to 98%), short reaction times, reusable solid Brønsted acid catalyst (HClO4-SiO2), and products that do not require column chromatography purification are all attractive features of this FCDR strategy. Electrochemical properties of THIs (6) are examined by cyclic voltammetry. The HOMO and LUMO energy level of THIs, 6a, 6c, 6d, 6j, 6o-6v, 6y, and 6aa are comparable with the reported ambipolar materials, and the HOMO levels of other THIs, 6b, 6e-6i, 6n, 6w, 6x, 6z and 6 ab-6ae are similar with the most commonly used hole transporting materials (HTMs).
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Affiliation(s)
- Sultana Shaik
- Green and Sustainable Synthetic Organic Chemistry Laboratory, Department of Chemistry, Yogi Vemana University, Kadapa, 516 005, Andhra Pradesh, India
| | - Rama Mohana Reddy Sirigireddy
- Green and Sustainable Synthetic Organic Chemistry Laboratory, Department of Chemistry, Yogi Vemana University, Kadapa, 516 005, Andhra Pradesh, India
| | - Kumar Godugu
- Green and Sustainable Synthetic Organic Chemistry Laboratory, Department of Chemistry, Yogi Vemana University, Kadapa, 516 005, Andhra Pradesh, India
| | - Venkatramu Vemula
- Department of Physics, Krishna University Dr. M. R. Appa Row College of PG Studies, Nuzvid, 521 201, Andhra Pradesh, India
| | - Raghava Reddy Kakarla
- School of Chemical and Biomolecular Engineering, The University of Sydney, NSW, 2006, Australia.
| | - Ekambaram Balaraman
- Department of Chemistry, Indian Institute of Science Education and Research (IISER) Tirupati, Tirupati, 517507, Andhra Pradesh, India
| | - Chinna Gangi Reddy Nallagondu
- Green and Sustainable Synthetic Organic Chemistry Laboratory, Department of Chemistry, Yogi Vemana University, Kadapa, 516 005, Andhra Pradesh, India.
| | - Tejraj M Aminabhavi
- School of Advanced Sciences, KLE Technological University, Hubballi, 580031, Karnataka, India.
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43
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Han Y, Wei B, Guo X, Jiao T. Improved hydroxyl radical production by electric-field-induced catalysis in O3/H2O2 process: A Reactive Molecular Dynamics Perspective. J Mol Liq 2022. [DOI: 10.1016/j.molliq.2022.120966] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/03/2022]
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44
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Anizadeh MR, Torabi M, Zolfigol MA, Yarie M. Catalytic application Fe3O4@SiO2@(CH2)3-urea-dithiocarbamic acid for the synthesis of triazole-linked pyridone derivatives. J Mol Struct 2022. [DOI: 10.1016/j.molstruc.2022.134885] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
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45
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Ji P, Liu X, Xu J, Zhang X, Guo J, Chen W, Zhao B. Direct Asymmetric α‐C−H Addition of N‐unprotected Propargylic Amines to Trifluoromethyl Ketones by Carbonyl Catalysis. Angew Chem Int Ed Engl 2022; 61:e202206111. [DOI: 10.1002/anie.202206111] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/26/2022] [Indexed: 11/05/2022]
Affiliation(s)
- Pengwei Ji
- The Education Ministry Key Lab of Resource Chemistry Shanghai Key Laboratory of Rare Earth Functional Materials Shanghai Frontiers Science Center of Biomimetic Catalysis Shanghai Normal University Shanghai 200234 China
| | - Xiaopei Liu
- The Education Ministry Key Lab of Resource Chemistry Shanghai Key Laboratory of Rare Earth Functional Materials Shanghai Frontiers Science Center of Biomimetic Catalysis Shanghai Normal University Shanghai 200234 China
| | - Jiwei Xu
- The Education Ministry Key Lab of Resource Chemistry Shanghai Key Laboratory of Rare Earth Functional Materials Shanghai Frontiers Science Center of Biomimetic Catalysis Shanghai Normal University Shanghai 200234 China
| | - Xu Zhang
- The Education Ministry Key Lab of Resource Chemistry Shanghai Key Laboratory of Rare Earth Functional Materials Shanghai Frontiers Science Center of Biomimetic Catalysis Shanghai Normal University Shanghai 200234 China
| | - Jianhua Guo
- The Education Ministry Key Lab of Resource Chemistry Shanghai Key Laboratory of Rare Earth Functional Materials Shanghai Frontiers Science Center of Biomimetic Catalysis Shanghai Normal University Shanghai 200234 China
| | - Wen‐Wen Chen
- The Education Ministry Key Lab of Resource Chemistry Shanghai Key Laboratory of Rare Earth Functional Materials Shanghai Frontiers Science Center of Biomimetic Catalysis Shanghai Normal University Shanghai 200234 China
| | - Baoguo Zhao
- The Education Ministry Key Lab of Resource Chemistry Shanghai Key Laboratory of Rare Earth Functional Materials Shanghai Frontiers Science Center of Biomimetic Catalysis Shanghai Normal University Shanghai 200234 China
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46
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Ji P, Liu X, Xu J, Zhang X, Guo J, Chen W, Zhao B. Direct Asymmetric α‐C−H Addition of N‐unprotected Propargylic Amines to Trifluoromethyl Ketones by Carbonyl Catalysis. Angew Chem Int Ed Engl 2022. [DOI: 10.1002/ange.202206111] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Pengwei Ji
- The Education Ministry Key Lab of Resource Chemistry Shanghai Key Laboratory of Rare Earth Functional Materials Shanghai Frontiers Science Center of Biomimetic Catalysis Shanghai Normal University Shanghai 200234 China
| | - Xiaopei Liu
- The Education Ministry Key Lab of Resource Chemistry Shanghai Key Laboratory of Rare Earth Functional Materials Shanghai Frontiers Science Center of Biomimetic Catalysis Shanghai Normal University Shanghai 200234 China
| | - Jiwei Xu
- The Education Ministry Key Lab of Resource Chemistry Shanghai Key Laboratory of Rare Earth Functional Materials Shanghai Frontiers Science Center of Biomimetic Catalysis Shanghai Normal University Shanghai 200234 China
| | - Xu Zhang
- The Education Ministry Key Lab of Resource Chemistry Shanghai Key Laboratory of Rare Earth Functional Materials Shanghai Frontiers Science Center of Biomimetic Catalysis Shanghai Normal University Shanghai 200234 China
| | - Jianhua Guo
- The Education Ministry Key Lab of Resource Chemistry Shanghai Key Laboratory of Rare Earth Functional Materials Shanghai Frontiers Science Center of Biomimetic Catalysis Shanghai Normal University Shanghai 200234 China
| | - Wen‐Wen Chen
- The Education Ministry Key Lab of Resource Chemistry Shanghai Key Laboratory of Rare Earth Functional Materials Shanghai Frontiers Science Center of Biomimetic Catalysis Shanghai Normal University Shanghai 200234 China
| | - Baoguo Zhao
- The Education Ministry Key Lab of Resource Chemistry Shanghai Key Laboratory of Rare Earth Functional Materials Shanghai Frontiers Science Center of Biomimetic Catalysis Shanghai Normal University Shanghai 200234 China
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47
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A novel synthesis of functionalized sulfonamide derivatives using the reaction of substituted thiourea or oxime derivatives with N-(2,3-dibromopropyl)-aryl(alkyl)sulfonamides. MONATSHEFTE FUR CHEMIE 2022. [DOI: 10.1007/s00706-022-02991-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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48
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Sahoo J, Panda J, Sahoo G. Unravelling the Development of Non-Covalent Organocatalysis in India. Synlett 2022. [DOI: 10.1055/s-0042-1751370] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
Abstract
AbstractThis review is devoted to underpinning the contributions of Indian researchers towards asymmetric organocatalysis. More specifically, a comprehensive compilation of reactions mediated by a wide range of non-covalent catalysis is illustrated. A detailed overview of vividly catalogued asymmetric organic transformations promoted by hydrogen bonding and Brønsted acid catalysis, alongside an assortment of catalysts is provided. Although asymmetric organocatalysis has etched itself in history, we aim to showcase the scientific metamorphosis of Indian research from baby steps to large strides within this field. 1 Introduction2 Non-Covalent Catalysis and Its Various Activation Modes3 Hydrogen-Bonding Catalysis3.1 Urea- and Thiourea-Derived Organocatalysts3.1.1 Thiourea-Derived Organocatalysts3.1.2 Urea-Derived Organocatalysts3.2 Squaramide-Derived Organocatalysts3.2.1 Michael Reactions3.2.2 C-Alkylation Reactions3.2.3 Mannich Reactions3.2.4 [3+2] Cycloaddition Reactions3.3 Cinchona-Alkaloid-Derived Organocatalysts3.3.1 Michael Reactions3.3.2 Aldol Reactions3.3.3 Friedel–Crafts Reactions3.3.4 Vinylogous Alkylation of 4-Methylcoumarins3.3.5 C-Sulfenylation Reactions3.3.6 Peroxyhemiacetalisation of Isochromans3.3.7 Diels–Alder Reactions3.3.8 Cycloaddition Reactions3.3.9 Morita–Baylis–Hilman Reactions4 Brønsted Acid Derived Organocatalysts4.1 Chiral Phosphoric Acid Catalysis4.1.1 Diels–Alder Reactions4.1.2 Addition of Ketimines4.1.3 Annulation of Acyclic Enecarbamates5 Conclusion
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49
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Trevisan L, Bond AD, Hunter CA. Quantitative Measurement of Cooperativity in H-Bonded Networks. J Am Chem Soc 2022; 144:19499-19507. [PMID: 36223562 PMCID: PMC9619404 DOI: 10.1021/jacs.2c08120] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
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Cooperative H-bonding
interactions are a feature of supramolecular
networks involving alcohols. A family of phenol oligomers, in which
the hydroxyl groups form intramolecular H-bonds, was used to investigate
this phenomenon. Chains of intramolecular H-bonds were characterized
using nuclear magnetic resonance (NMR) spectroscopy in solution and
X-ray crystallography in the solid state. The phenol oligomers were
used to make quantitative measurements of the effects of the intramolecular
interactions on the strengths of intermolecular H-bonding interactions
between the H-bond donor on the end of the chain and a series of H-bond
acceptors. Intramolecular H-bonding interactions in the chain increase
the strength of a single intermolecular H-bond between the terminal
phenol and quinuclidine by up to 14 kJ mol–1 in
the n-octane solution. Although the magnitude of
the effect increases with the length of the H-bonded chain, the first
intramolecular H-bond has a much larger effect than subsequent interactions.
H-bond cooperativity is dominated by pairwise interactions between
nearest neighbors, and longer range effects are negligible. The results
were used to develop a simple model for cooperativity in H-bond networks
using an empirical parameter κ to quantify the sensitivity of
the H-bond properties of a functional group to polarization. The value
of κ measured in these systems was 0.33, which means that formation
of the first H-bond increases the polarity of the next H-bond donor
in the chain by 33%. The cumulative cooperative effect in longer H-bonded
chains reaches an asymptotic value, which corresponds to a maximum
increase in the polarity of the terminal H-bond donor of 50%.
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Affiliation(s)
- Lucia Trevisan
- Yusuf Hamied Department of Chemistry, University of Cambridge, Lensfield Road, CambridgeCB2 1 EW, U.K
| | - Andrew D Bond
- Yusuf Hamied Department of Chemistry, University of Cambridge, Lensfield Road, CambridgeCB2 1 EW, U.K
| | - Christopher A Hunter
- Yusuf Hamied Department of Chemistry, University of Cambridge, Lensfield Road, CambridgeCB2 1 EW, U.K
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50
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Ehrhard AA, Gunkel L, Jäger S, Sell AC, Nagata Y, Hunger J. Elucidating Conformation and Hydrogen-Bonding Motifs of Reactive Thiourea Intermediates. ACS Catal 2022; 12:12689-12700. [PMID: 36313523 PMCID: PMC9594049 DOI: 10.1021/acscatal.2c03382] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/13/2022] [Revised: 09/19/2022] [Indexed: 11/29/2022]
Abstract
![]()
Substituted diphenylthioureas (DPTUs) are efficient hydrogen-bonding
organo-catalysts, and substitution of DPTUs has been shown to greatly
affect catalytic activity. Yet, both the conformation of DPTUs in
solution and the conformation and hydrogen-bonded motifs within catalytically
active intermediates, pertinent to their mode of activation, have
remained elusive. By combining linear and ultrafast vibrational spectroscopy
with spectroscopic simulations and calculations, we show that different
conformational states of thioureas give rise to distinctively different
N–H stretching bands in the infrared spectra. In the absence
of hydrogen-bond-accepting substrates, we show that vibrational structure
and dynamics are highly sensitive to the substitution of DPTUs with
CF3 groups and to the interaction with the solvent environment,
allowing for disentangling the different conformational states. In
contrast to bare diphenylthiourea (0CF-DPTU), we find the catalytically
superior CF3-substituted DPTU (4CF-DPTU) to favor the trans–trans conformation in solution,
allowing for donating two hydrogen bonds to the reactive substrate.
In the presence of a prototypical substrate, DPTUs in trans–trans conformation hydrogen bond to the
substrate’s C=O group, as evidenced by a red-shift of
the N–H vibration. Yet, our time-resolved infrared experiments
indicate that only one N–H group forms a strong hydrogen bond
to the carbonyl moiety, while thiourea’s second N–H
group only weakly interacts with the substrate. Our data indicate
that hydrogen-bond exchange between these N–H groups occurs
on the timescale of a few picoseconds for 0CF-DPTU and is significantly
accelerated upon CF3 substitution. Our results highlight
the subtle interplay between conformational equilibria, bonding states,
and bonding lifetimes in reactive intermediates in thiourea catalysis,
which help rationalize their catalytic activity.
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Affiliation(s)
- Amelie A. Ehrhard
- Max-Planck Institute for Polymer Research, Ackermannweg 10, 55128 Mainz, Germany
| | - Lucas Gunkel
- Max-Planck Institute for Polymer Research, Ackermannweg 10, 55128 Mainz, Germany
| | - Sebastian Jäger
- Max-Planck Institute for Polymer Research, Ackermannweg 10, 55128 Mainz, Germany
| | - Arne C. Sell
- Max-Planck Institute for Polymer Research, Ackermannweg 10, 55128 Mainz, Germany
| | - Yuki Nagata
- Max-Planck Institute for Polymer Research, Ackermannweg 10, 55128 Mainz, Germany
| | - Johannes Hunger
- Max-Planck Institute for Polymer Research, Ackermannweg 10, 55128 Mainz, Germany
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