1
|
Teli B, Wani MM, Jan S, Bhat HR, Bhat BA. Micelle-mediated synthesis of quinoxaline, 1,4-benzoxazine and 1,4-benzothiazine scaffolds from styrenes. Org Biomol Chem 2024; 22:6593-6604. [PMID: 39086328 DOI: 10.1039/d4ob00928b] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 08/02/2024]
Abstract
A range of heterocycles based on quinoxalines, 1,4-benzoxazines and 1,4-benzothiazines have been accessed from styrenes by reacting them with benzene-1,2-diamine, 2-aminophenol and 2-aminothiophenol respectively in micellar medium. This reaction occurring in a less explored cetylpyridinium bromide (CPB) micellar medium operates in the presence of NBS through a tandem hydrobromination-oxidation cascade, converting styrenes to phenacyl bromides. Its subsequent nucleophilic addition with aromatic 1,2-dinucleophiles and further transformations led to the formation of heterocyclic constructs. The locus of the reaction site was confirmed through NMR studies and the types of interactions between the CPB and solubilizates were established by DFT calculations.
Collapse
Affiliation(s)
- Bisma Teli
- CSIR-Indian Institute of Integrative Medicine, Sanatnagar, Srinagar-190005, India.
- Academy of Scientific and Innovative Research (AcSIR), Ghaziabad-201002, India
| | - Mohmad Muzafar Wani
- CSIR-Indian Institute of Integrative Medicine, Sanatnagar, Srinagar-190005, India.
- Academy of Scientific and Innovative Research (AcSIR), Ghaziabad-201002, India
| | - Shafia Jan
- CSIR-Indian Institute of Integrative Medicine, Sanatnagar, Srinagar-190005, India.
| | - Haamid Rasool Bhat
- CSIR-Indian Institute of Integrative Medicine, Sanatnagar, Srinagar-190005, India.
| | - Bilal A Bhat
- CSIR-Indian Institute of Integrative Medicine, Sanatnagar, Srinagar-190005, India.
- Academy of Scientific and Innovative Research (AcSIR), Ghaziabad-201002, India
| |
Collapse
|
2
|
Wani MM, Rashid A, Bhat BA. A micelle-mediated approach enables facile access to bridged oxabicyclo[ n.3.1]alkene scaffolds. Org Biomol Chem 2023; 21:6151-6159. [PMID: 37462511 DOI: 10.1039/d3ob00918a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 08/03/2023]
Abstract
Oxabicyclo[n.3.1]alkene scaffolds present in a diverse range of complex natural products have been accessed by reacting 2-cycloalkenones with 1,3-cycloalkadiones in a micellar medium. This reaction occurring in a micellar confinement environment operates through a Michael addition/enolization/oxygen addition cascade to furnish highly functionalized constructs using a sustainable organic synthesis protocol. NMR analysis confirms that the locus of the solubilizates is within the palisade and stern regions of the micellar cavity.
Collapse
Affiliation(s)
- Mohmad Muzafar Wani
- CSIR-Indian Institute of Integrative Medicine, Sanatnagar, Srinagar-190005, India.
- Academy of Scientific and Innovative Research (AcSIR), Ghaziabad-201002, India
| | - Auqib Rashid
- CSIR-Indian Institute of Integrative Medicine, Sanatnagar, Srinagar-190005, India.
- Academy of Scientific and Innovative Research (AcSIR), Ghaziabad-201002, India
| | - Bilal A Bhat
- CSIR-Indian Institute of Integrative Medicine, Sanatnagar, Srinagar-190005, India.
- Academy of Scientific and Innovative Research (AcSIR), Ghaziabad-201002, India
| |
Collapse
|
3
|
Mattiello S, Ghiglietti E, Zucchi A, Beverina L. Selectivity in micellar catalysed reactions. The role of interfacial dipole, compartmentalisation, and specific interactions with the surfactants. Curr Opin Colloid Interface Sci 2023. [DOI: 10.1016/j.cocis.2023.101681] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/15/2023]
|
4
|
Pious A, Kamlekar RK, Muthusamy S, Jothi A, Praneeth VK, Ramesh S, Anbazhagan V. Effectiveness of the hydrophobic core of pyridine tethered N-acyl glycine micelles in improving chromenoquinoline synthesis in water. Colloids Surf A Physicochem Eng Asp 2023. [DOI: 10.1016/j.colsurfa.2023.131129] [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]
|
5
|
Racheeti PB, Gunturu RB, Pinapati SR, Kowthalam A, Tamminana R, Rudraraju R. Hypervalent iodine(III) promoted synthesis of isothiocyanates in water. SYNTHETIC COMMUN 2022. [DOI: 10.1080/00397911.2022.2148222] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
| | - Ratna Babu Gunturu
- Department of Chemistry, Acharya Nagarjuna University, Guntur, AP, India
| | | | - Anitha Kowthalam
- Department of Chemistry, Sri Krishna Devaraya University, Ananthapur, AP, India
| | - Ramana Tamminana
- Department of Chemistry, VIT-AP University, Amaravati, AP, India
| | | |
Collapse
|
6
|
Tang C, McInnes BT. Cascade Processes with Micellar Reaction Media: Recent Advances and Future Directions. Molecules 2022; 27:molecules27175611. [PMID: 36080376 PMCID: PMC9458028 DOI: 10.3390/molecules27175611] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/18/2022] [Revised: 08/27/2022] [Accepted: 08/29/2022] [Indexed: 11/26/2022] Open
Abstract
Reducing the use of solvents is an important aim of green chemistry. Using micelles self-assembled from amphiphilic molecules dispersed in water (considered a green solvent) has facilitated reactions of organic compounds. When performing reactions in micelles, the hydrophobic effect can considerably accelerate apparent reaction rates, as well as enhance selectivity. Here, we review micellar reaction media and their potential role in sustainable chemical production. The focus of this review is applications of engineered amphiphilic systems for reactions (surface-active ionic liquids, designer surfactants, and block copolymers) as reaction media. Micelles are a versatile platform for performing a large array of organic chemistries using water as the bulk solvent. Building on this foundation, synthetic sequences combining several reaction steps in one pot have been developed. Telescoping multiple reactions can reduce solvent waste by limiting the volume of solvents, as well as eliminating purification processes. Thus, in particular, we review recent advances in “one-pot” multistep reactions achieved using micellar reaction media with potential applications in medicinal chemistry and agrochemistry. Photocatalyzed reactions in micellar reaction media are also discussed. In addition to the use of micelles, we emphasize the process (steps to isolate the product and reuse the catalyst).
Collapse
Affiliation(s)
- Christina Tang
- Chemical and Life Science Engineering Department, Virginia Commonwealth University, Richmond, VA 23284, USA
- Correspondence:
| | - Bridget T. McInnes
- Computer Science Department, Virginia Commonwealth University, Richmond, VA 23284, USA
| |
Collapse
|
7
|
Petersen H, Ballmann M, Krause N, Weberskirch R. Gold(I) NHC Catalysts Immobilized to Amphiphilic Block Copolymers: A Versatile Approach to Micellar Gold Catalysis in Water. ChemCatChem 2022. [DOI: 10.1002/cctc.202200727] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Hanne Petersen
- TU Dortmund University: Technische Universitat Dortmund Fakultät für Chemie und Chem. Biologie Otto-Hahn Str. 6 44227 Dortmund GERMANY
| | - Monika Ballmann
- Technische Universität Dortmund: Technische Universitat Dortmund Fakultät für Chemie und Chem. Biologie Otto-Hahn Str. 6 44227 Dortmund GERMANY
| | - Norbert Krause
- TU Dortmund University: Technische Universitat Dortmund Fakultät für Chemie und Chem. Biologie Otto-Hahn Str. 6 44227 Dortmund GERMANY
| | - Ralf Weberskirch
- Dortmund University of Technology Fakultät Chemie und Chem. Biologie , organic chemistry Otto-Hahn-Str. 6Room: C2-04-702 44227 Dortmund GERMANY
| |
Collapse
|
8
|
Wani MM, Dar AA, Bhat BA. Micelle-guided Morita-Baylis-Hillman reaction of ketones in water. Org Biomol Chem 2022; 20:4888-4893. [PMID: 35670447 DOI: 10.1039/d2ob00638c] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Abstract
A novel Morita-Baylis-Hillman reaction employing electron-deficient alkenes like acrylonitrile with a wide range of aryl and aliphatic ketones using cooperative catalysis in micellar media has been delineated. This transformation executed in water under mild reaction conditions in a confined environment of micelles is aligned to the ideas of sustainable and green chemistry. The site of the reaction was established by incisive proton NMR studies in the palisade region of the micellar assembly. This study is expected to encourage the use of micellar catalysis for energetically less favorable chemical reactions.
Collapse
Affiliation(s)
- Mohmad Muzafar Wani
- CSIR-Indian Institute of Integrative Medicine, Sanatnagar Srinagar-190005, India. .,Academy of Scientific and Innovative Research (AcSIR), Ghaziabad-201002, India
| | - Aijaz Ahmad Dar
- Softmatter Research Group, Department of Chemistry, University of Kashmir, Srinagar 190006, J&K, India
| | - Bilal A Bhat
- CSIR-Indian Institute of Integrative Medicine, Sanatnagar Srinagar-190005, India. .,Academy of Scientific and Innovative Research (AcSIR), Ghaziabad-201002, India
| |
Collapse
|
9
|
Rashid S, Bhat BA, Mehta G. Micelle‐Mediated Trimerization of Ynals to Orthogonally Substituted 4
H
‐Pyrans in Water: Downstream Rearrangement to Bioactive 2,8‐dioxabicyclo[3.3.1]nona‐3,6‐diene Frameworks. European J Org Chem 2021. [DOI: 10.1002/ejoc.202101122] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
Affiliation(s)
- Showkat Rashid
- Natural Products and Medicinal Chemistry CSIR-Indian Institute of Integrative Medicine Sanatnagar Srinagar 190005 India
- School of Chemistry University of Hyderabad Hyderabad 500046 India
| | - Bilal A. Bhat
- Natural Products and Medicinal Chemistry CSIR-Indian Institute of Integrative Medicine Sanatnagar Srinagar 190005 India
- Academy of Scientific and Innovative Research Ghaziabad 201002 India
| | - Goverdhan Mehta
- School of Chemistry University of Hyderabad Hyderabad 500046 India
| |
Collapse
|
10
|
Banerjee M, Panjikar PC, Bhutia ZT, Bhosle AA, Chatterjee A. Micellar nanoreactors for organic transformations with a focus on “dehydration” reactions in water: A decade update. Tetrahedron 2021. [DOI: 10.1016/j.tet.2021.132142] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
|
11
|
Nejrotti S, Prandi C. Gold Catalysis and Furans: A Powerful Match for Synthetic Connections. SYNTHESIS-STUTTGART 2020. [DOI: 10.1055/s-0040-1705996] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
Abstract
AbstractThis review summarizes the advances made on the synthesis and functionalization of furans via gold catalysis during the period between 2016 and 2020. A separate section is dedicated to the tandem gold-catalyzed synthesis and functionalization of furans.1 Introduction2 Gold-Catalyzed Synthesis of Furans2.1 Cycloisomerizations of Alkynyl and Cumulenyl Alcohols2.2 Cycloisomerizations of Alkynyl and Allenyl Ketones2.3 Reactions with External Oxidants2.4 Miscellaneous3 Gold-Catalyzed Functionalization of Furans3.1 Cycloadditions3.2 Furan Ring Decorations3.3 Reactions Involving Furan Ring Opening4 Gold-Catalyzed Tandem Synthesis and Functionalization of Furans4.1 Cycloisomerizations Followed by Gold-Catalyzed Cycloaddition4.2 Cycloisomerizations to a Gold 1,3- or 1,4-Dipole and Intermolecular Annulation4.3 Cycloisomerizations to a Gold Carbene and Intermolecular Trapping5 Conclusion
Collapse
|
12
|
Nghiem TL, Coban D, Tjaberings S, Gröschel AH. Recent Advances in the Synthesis and Application of Polymer Compartments for Catalysis. Polymers (Basel) 2020; 12:E2190. [PMID: 32987965 PMCID: PMC7600123 DOI: 10.3390/polym12102190] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/20/2020] [Revised: 09/18/2020] [Accepted: 09/22/2020] [Indexed: 12/23/2022] Open
Abstract
Catalysis is one of the most important processes in nature, science, and technology, that enables the energy efficient synthesis of essential organic compounds, pharmaceutically active substances, and molecular energy sources. In nature, catalytic reactions typically occur in aqueous environments involving multiple catalytic sites. To prevent the deactivation of catalysts in water or avoid unwanted cross-reactions, catalysts are often site-isolated in nanopockets or separately stored in compartments. These concepts have inspired the design of a range of synthetic nanoreactors that allow otherwise unfeasible catalytic reactions in aqueous environments. Since the field of nanoreactors is evolving rapidly, we here summarize-from a personal perspective-prominent and recent examples for polymer nanoreactors with emphasis on their synthesis and their ability to catalyze reactions in dispersion. Examples comprise the incorporation of catalytic sites into hydrophobic nanodomains of single chain polymer nanoparticles, molecular polymer nanoparticles, and block copolymer micelles and vesicles. We focus on catalytic reactions mediated by transition metal and organocatalysts, and the separate storage of multiple catalysts for one-pot cascade reactions. Efforts devoted to the field of nanoreactors are relevant for catalytic chemistry and nanotechnology, as well as the synthesis of pharmaceutical and natural compounds. Optimized nanoreactors will aid in the development of more potent catalytic systems for green and fast reaction sequences contributing to sustainable chemistry by reducing waste of solvents, reagents, and energy.
Collapse
Affiliation(s)
| | | | | | - André H. Gröschel
- Physical Chemistry and Centre for Soft Nanoscience (SoN), University of Münster, 48149 Münster, Germany; (T.-L.N.); (D.C.); (S.T.)
| |
Collapse
|
13
|
Ceriani C, Ghiglietti E, Sassi M, Mattiello S, Beverina L. Taming Troublesome Suzuki–Miyaura Reactions in Water Solution of Surfactants by the Use of Lecithin: A Step beyond the Micellar Model. Org Process Res Dev 2020. [DOI: 10.1021/acs.oprd.0c00285] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Affiliation(s)
- Chiara Ceriani
- Department of Materials Science, University of Milano-Bicocca, Via R. Cozzi 55, Milano 20125, Italy
| | - Erika Ghiglietti
- Department of Materials Science, University of Milano-Bicocca, Via R. Cozzi 55, Milano 20125, Italy
| | - Mauro Sassi
- Department of Materials Science, University of Milano-Bicocca, Via R. Cozzi 55, Milano 20125, Italy
| | - Sara Mattiello
- Department of Materials Science, University of Milano-Bicocca, Via R. Cozzi 55, Milano 20125, Italy
| | - Luca Beverina
- Department of Materials Science, University of Milano-Bicocca and INSTM, Via R. Cozzi 55, Milano 20125, Italy
| |
Collapse
|
14
|
Accelerated Reaction Rates within Self-Assembled Polymer Nanoreactors with Tunable Hydrophobic Microenvironments. Polymers (Basel) 2020; 12:polym12081774. [PMID: 32784742 PMCID: PMC7463608 DOI: 10.3390/polym12081774] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/23/2020] [Revised: 08/04/2020] [Accepted: 08/04/2020] [Indexed: 12/04/2022] Open
Abstract
Performing reactions in the presence of self-assembled hierarchical structures of amphiphilic macromolecules can accelerate reactions while using water as the bulk solvent due to the hydrophobic effect. We leveraged non-covalent interactions to self-assemble filled-polymer micelle nanoreactors (NR) incorporating gold nanoparticle catalysts into various amphiphilic polymer nanostructures with comparable hydrodynamic nanoreactor size and gold concentration in the nanoreactor dispersion. We systematically studied the effect of the hydrophobic co-precipitant on self-assembly and catalytic performance. We observed that co-precipitants that interact with gold are beneficial for improving incorporation efficiency of the gold nanoparticles into the nanocomposite nanoreactor during self-assembly but decrease catalytic performance. Hierarchical assemblies with co-precipitants that leverage noncovalent interactions could enhance catalytic performance. For the co-precipitants that do not interact strongly with gold, the catalytic performance was strongly affected by the hydrophobic microenvironment of the co-precipitant. Specifically, the apparent reaction rate per surface area using castor oil (CO) was over 8-fold greater than polystyrene (750 g/mol, PS 750); the turnover frequency was higher than previously reported self-assembled polymer systems. The increase in apparent catalytic performance could be attributed to differences in reactant solubility rather than differences in mass transfer or intrinsic kinetics; higher reactant solubility enhances apparent reaction rates. Full conversion of 4-nitrophenol was achieved within three minutes for at least 10 sequential reactions demonstrating that the nanoreactors could be used for multiple reactions.
Collapse
|
15
|
Sak H, Mawick M, Krause N. Sustainable Gold Catalysis in Water Using Cyclodextrin‐tagged NHC‐Gold Complexes. ChemCatChem 2019. [DOI: 10.1002/cctc.201901658] [Citation(s) in RCA: 21] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
Affiliation(s)
- Hülya Sak
- Organic ChemistryDortmund University of Technology Otto-Hahn-Strasse 6 Dortmund D-44227 Germany
| | - Matthias Mawick
- Organic ChemistryDortmund University of Technology Otto-Hahn-Strasse 6 Dortmund D-44227 Germany
| | - Norbert Krause
- Organic ChemistryDortmund University of Technology Otto-Hahn-Strasse 6 Dortmund D-44227 Germany
| |
Collapse
|
16
|
The pivotal role of the counterion in gold catalyzed hydration and alkoxylation of alkynes. Coord Chem Rev 2019. [DOI: 10.1016/j.ccr.2019.06.007] [Citation(s) in RCA: 31] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
|
17
|
Ansari TN, Taussat A, Clark AH, Nachtegaal M, Plummer S, Gallou F, Handa S. Insights on Bimetallic Micellar Nanocatalysis for Buchwald–Hartwig Aminations. ACS Catal 2019. [DOI: 10.1021/acscatal.9b02622] [Citation(s) in RCA: 34] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Affiliation(s)
- Tharique N. Ansari
- Department of Chemistry, University of Louisville, Louisville, Kentucky 40292, United States
| | - Armand Taussat
- Department of Chemistry, University of Louisville, Louisville, Kentucky 40292, United States
| | - Adam H. Clark
- Paul Scherrer Institute, Forschungsstrasse 111, 5232 Villigen, Switzerland
| | - Maarten Nachtegaal
- Paul Scherrer Institute, Forschungsstrasse 111, 5232 Villigen, Switzerland
| | - Scott Plummer
- Novartis Institutes for Biomedical Research, 250 Massachusetts Ave, Cambridge, Massachusetts 02139, United States
| | | | - Sachin Handa
- Department of Chemistry, University of Louisville, Louisville, Kentucky 40292, United States
| |
Collapse
|
18
|
Srisa J, Tankam T, Sukwattanasinitt M, Wacharasindhu S. Micelle-Enabled One-Pot Guanidine Synthesis in Water Directly from Isothiocyanate using Hypervalent Iodine(III) Reagents under Mild Conditions. Chem Asian J 2019; 14:3335-3343. [PMID: 31397526 DOI: 10.1002/asia.201900982] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/19/2019] [Indexed: 02/06/2023]
Abstract
In this work, we developed a one-pot synthesis of guanidine directly from isothiocyanate using DIB (diacetoxyiodobenzene) as a desulfurizing agent under micellar conditions in water. Our optimization study revealed that the use of 1 % TPGS-750-M as a surfactant with NaOH as an additive base at room temperature can convert a variety of isothiocyanates and amines into corresponding guanidines in excellent yields (69-95 %). This synthetic process in water can be applied to prepare guanidine at gram-scale quantity. Our aqueous micellar medium also demonstrated high reusability as the reaction can be performed for several cycles without losing its efficiency. The reaction is metal-free, utilizes water as solvent and practical (room temperature and open flask).
Collapse
Affiliation(s)
- Jakkrit Srisa
- Department of Chemistry, Faculty of Science, Chulalongkorn University, Bangkok, 10330, Thailand.,Center of Excellence on Petrochemical and Materials Technology, Chulalongkorn University, Bangkok, Thailand
| | - Theeranon Tankam
- Department of Chemistry, Faculty of Science, Chulalongkorn University, Bangkok, 10330, Thailand
| | - Mongkol Sukwattanasinitt
- Department of Chemistry, Faculty of Science, Chulalongkorn University, Bangkok, 10330, Thailand.,Nanotec-CU Center of Excellence on Food and Agriculture, Department of Chemistry, Faculty of Science, Chulalongkorn University, Bangkok, 10330, Thailand
| | - Sumrit Wacharasindhu
- Center of Excellence on Petrochemical and Materials Technology, Chulalongkorn University, Bangkok, Thailand.,Nanotec-CU Center of Excellence on Food and Agriculture, Department of Chemistry, Faculty of Science, Chulalongkorn University, Bangkok, 10330, Thailand
| |
Collapse
|
19
|
Bora PP, Bihani M, Plummer S, Gallou F, Handa S. Shielding Effect of Micelle for Highly Effective and Selective Monofluorination of Indoles in Water. CHEMSUSCHEM 2019; 12:3037-3042. [PMID: 30834700 DOI: 10.1002/cssc.201900316] [Citation(s) in RCA: 25] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/30/2019] [Revised: 02/28/2019] [Indexed: 05/12/2023]
Abstract
Highly selective direct monofluorination of indoles and arenes was developed through an approach that allows site-specific solubility of substrate and fluorine source in the micelle. This approach was highly selective for a broad range of substrates with excellent functional group tolerance. Differences in binding constant and solubility of indoles and arenes in the micelle allowed the fine-tuning of selectivity. Control experiments suggested a radical pathway and provided insight into the role of micelles of the environmentally benign amphiphile PS-750-M. Dynamic light scattering experiments strongly indicated the site-specific solubility of the substrate and fluorine source. The methodology was successfully adapted to gram scale, and the E-factor established from a recycle study indicated that the process is environmentally responsible and sustainable.
Collapse
Affiliation(s)
- Pranjal P Bora
- Department of Chemistry, University of Louisville, 2320 S. Brook St., Louisville, KY, 40292, USA
| | - Manisha Bihani
- Department of Chemistry, University of Louisville, 2320 S. Brook St., Louisville, KY, 40292, USA
| | - Scott Plummer
- Novartis Institutes for BioMedical Research, 250 Massachusetts Ave, Cambridge, MA, 02139, USA
| | | | - Sachin Handa
- Department of Chemistry, University of Louisville, 2320 S. Brook St., Louisville, KY, 40292, USA
| |
Collapse
|
20
|
Abstract
Furans are five-membered aromatic heterocycles containing one oxygen atom that are important
building blocks in organic chemistry, but also as natural products found in various natural
sources, mostly in plants, algae and microorganisms. In this review, we discussed recent advances in the
synthesis of furan compounds. Some classical methods have been modified and improved, while other
new methods have been developed. A vast variety of catalysts was used for these transformations. In
many studies, furan synthesis reaction mechanisms were also investigated and proposed.
Collapse
Affiliation(s)
- Dau Xuan Duc
- Department of Chemistry, Vinh University, Vinh City, Vietnam
| |
Collapse
|
21
|
Harrison A, Vuong TT, Zeevi MP, Hittel BJ, Wi S, Tang C. Rapid Self-Assembly of Metal/Polymer Nanocomposite Particles as Nanoreactors and Their Kinetic Characterization. NANOMATERIALS (BASEL, SWITZERLAND) 2019; 9:E318. [PMID: 30823357 PMCID: PMC6473589 DOI: 10.3390/nano9030318] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/24/2019] [Revised: 02/14/2019] [Accepted: 02/18/2019] [Indexed: 01/11/2023]
Abstract
Self-assembled metal nanoparticle-polymer nanocomposite particles as nanoreactors are a promising approach for performing liquid phase reactions using water as a bulk solvent. In this work, we demonstrate rapid, scalable self-assembly of metal nanoparticle catalyst-polymer nanocomposite particles via Flash NanoPrecipitation. The catalyst loading and size of the nanocomposite particles can be tuned independently. Using nanocomposite particles as nanoreactors and the reduction of 4-nitrophenol as a model reaction, we study the fundamental interplay of reaction and diffusion. The induction time is affected by the sequence of reagent addition, time between additions, and reagent concentration. Combined, our experiments indicate the induction time is most influenced by diffusion of sodium borohydride. Following the induction time, scaling analysis and effective diffusivity measured using NMR indicate that the observed reaction rate are reaction- rather than diffusion-limited. Furthermore, the intrinsic kinetics are comparable to ligand-free gold nanoparticles. This result indicates that the polymer microenvironment does not de-activate or block the catalyst active sites.
Collapse
Affiliation(s)
- Andrew Harrison
- Department of Chemical and Life Sciences Engineering, Virginia Commonwealth University, Richmond, VA 23284-3028, USA.
| | - Tien T Vuong
- Department of Chemical and Life Sciences Engineering, Virginia Commonwealth University, Richmond, VA 23284-3028, USA.
| | - Michael P Zeevi
- Department of Chemical and Life Sciences Engineering, Virginia Commonwealth University, Richmond, VA 23284-3028, USA.
| | - Benjamin J Hittel
- Department of Chemical and Life Sciences Engineering, Virginia Commonwealth University, Richmond, VA 23284-3028, USA.
| | - Sungsool Wi
- The National High Magnetic Field Laboratory, Florida State University, Tallahassee, FL 32310, USA.
| | - Christina Tang
- Department of Chemical and Life Sciences Engineering, Virginia Commonwealth University, Richmond, VA 23284-3028, USA.
| |
Collapse
|
22
|
Rösler T, Faßbach TA, Schrimpf M, Vorholt AJ, Leitner W. Toward Water-Based Recycling Techniques: Methodologies for Homogeneous Catalyst Recycling in Liquid/Liquid Multiphase Media and Their Implementation in Continuous Processes. Ind Eng Chem Res 2018. [DOI: 10.1021/acs.iecr.8b04295] [Citation(s) in RCA: 20] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- T. Rösler
- Max-Planck-Institute for Chemical Energy Conversion, Stiftstraße 34, 45470 Mülheim an der Ruhr, Germany
| | - T. A. Faßbach
- Max-Planck-Institute for Chemical Energy Conversion, Stiftstraße 34, 45470 Mülheim an der Ruhr, Germany
| | - M. Schrimpf
- Max-Planck-Institute for Chemical Energy Conversion, Stiftstraße 34, 45470 Mülheim an der Ruhr, Germany
| | - A. J. Vorholt
- Max-Planck-Institute for Chemical Energy Conversion, Stiftstraße 34, 45470 Mülheim an der Ruhr, Germany
| | - W. Leitner
- Max-Planck-Institute for Chemical Energy Conversion, Stiftstraße 34, 45470 Mülheim an der Ruhr, Germany
| |
Collapse
|
23
|
Lipshutz BH, Ghorai S, Cortes-Clerget M. The Hydrophobic Effect Applied to Organic Synthesis: Recent Synthetic Chemistry "in Water". Chemistry 2018; 24:6672-6695. [PMID: 29465785 DOI: 10.1002/chem.201705499] [Citation(s) in RCA: 185] [Impact Index Per Article: 30.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/19/2017] [Indexed: 12/19/2022]
Abstract
Recent developments over the past few years in aqueous micellar catalysis are discussed. Applications to problems in synthesis are highlighted, enabled by the use of surfactants that self-aggregate in water into micelles as nanoreactors. These include amphiphiles that have been available for some time, as well as those that have been newly designed. Reactions catalyzed by transition metals, including Pd, Cu, Rh, and Au, are of particular focus.
Collapse
Affiliation(s)
- Bruce H Lipshutz
- Department of Chemistry & Biochemistry, University of California, Santa Barbara, CA, 93106, USA
| | - Subir Ghorai
- Chemistry Research & Development, MilliporeSigma, 6000 N. Teutonia Avenue, Milwaukee, WI, 53209, USA
| | - Margery Cortes-Clerget
- Department of Chemistry & Biochemistry, University of California, Santa Barbara, CA, 93106, USA
| |
Collapse
|
24
|
Blanc A, Bénéteau V, Weibel JM, Pale P. Silver & gold-catalyzed routes to furans and benzofurans. Org Biomol Chem 2018; 14:9184-9205. [PMID: 27722719 DOI: 10.1039/c6ob01468b] [Citation(s) in RCA: 80] [Impact Index Per Article: 13.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Silver and gold have become incredibly versatile and mild catalysts for numerous transformations, especially in heterocycle synthesis. For the most prominent of them, i.e. furans, silver and gold, with their unique reactivity and mildness, allow numerous possible routes to highly substituted and/or functionalized furans from a large variety of starting materials. Silver and gold catalysis provide thus the most flexible way to this important family of compounds. The present review describes these silver and gold-catalyzed routes, with some emphasis on mechanistic aspects, and proposes a comparison of both the silver and the gold-catalyzed syntheses of furans.
Collapse
Affiliation(s)
- Aurélien Blanc
- Laboratoire de Synthèse, Réactivité Organiques et Catalyse, Institut de Chimie (UMR CNRS 7177), Université de Strasbourg, 4 rue Blaise Pascal, 67070 Strasbourg, France.
| | - Valérie Bénéteau
- Laboratoire de Synthèse, Réactivité Organiques et Catalyse, Institut de Chimie (UMR CNRS 7177), Université de Strasbourg, 4 rue Blaise Pascal, 67070 Strasbourg, France.
| | - Jean-Marc Weibel
- Laboratoire de Synthèse, Réactivité Organiques et Catalyse, Institut de Chimie (UMR CNRS 7177), Université de Strasbourg, 4 rue Blaise Pascal, 67070 Strasbourg, France.
| | - Patrick Pale
- Laboratoire de Synthèse, Réactivité Organiques et Catalyse, Institut de Chimie (UMR CNRS 7177), Université de Strasbourg, 4 rue Blaise Pascal, 67070 Strasbourg, France.
| |
Collapse
|
25
|
Ding A, Xu J, Gu G, Lu G, Huang X. PHEA-g-PMMA Well-Defined Graft Copolymer: ATRP Synthesis, Self-Assembly, and Synchronous Encapsulation of Both Hydrophobic and Hydrophilic Guest Molecules. Sci Rep 2017; 7:12601. [PMID: 28974694 PMCID: PMC5626726 DOI: 10.1038/s41598-017-12710-y] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/12/2017] [Accepted: 09/18/2017] [Indexed: 02/03/2023] Open
Abstract
A series of well-defined amphiphilic graft copolymer bearing a hydrophilic poly(2-hydroxyethyl acrylate) (PHEA) backbone and hydrophobic poly(methyl methacrylate) (PMMA) side chains was synthesized by successive reversible addition-fragmentation chain transfer (RAFT) polymerization and atom transfer radical polymerization (ATRP) through the grafting-from strategy. A well-defined PHEA-based backbone with Cl-containing ATRP initiating group in every repeated unit (Mw/Mn = 1.08), poly(2-hydroxyethyl 2-((2-chloropropanoyloxy)methyl)acrylate) (PHECPMA), was first prepared by RAFT homopolymerization of 2-hydroxyethyl 2-((2-chloropropanoyloxy)methyl)acrylate (HECPMA), a Cl-containing trifunctional acrylate. ATRP of methyl methacrylate was subsequently initiated by PHECPMA homopolymer to afford the target well-defined poly(2-hydroxyethyl acrylate)-graft-poly(methyl methacrylate) (PHEA-g-PMMA) graft copolymers (Mw/Mn ≤ 1.36) with 34 PMMA side chains and 34 pendant hydroxyls in PHEA backbone using CuCl/dHbpy as catalytic system. The critical micelle concentration (cmc) of the obtained graft copolymer was determined by fluorescence spectroscopy using N-phenyl-1-naphthylamine as probe while micellar morphologies in aqueous media were visualized by transmission electron microscopy. Interestingly, PHEA-g-PMMA graft copolymer could self-assemble into large compound micelles rather than common spherical micelles, which can encapsulate hydrophilic rhodamine 6 G and hydrophobic pyrene separately or simultaneously.
Collapse
Affiliation(s)
- Aishun Ding
- Department of Materials Science, Fudan University, 220 Handan Road, Shanghai, 200433, People's Republic of China.,Key Laboratory of Synthetic and Self-Assembly Chemistry for Organic Functional Molecules, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, 345 Lingling Road, Shanghai, 200032, People's Republic of China
| | - Jie Xu
- Department of Materials Science, Fudan University, 220 Handan Road, Shanghai, 200433, People's Republic of China
| | - Guangxin Gu
- Department of Materials Science, Fudan University, 220 Handan Road, Shanghai, 200433, People's Republic of China.
| | - Guolin Lu
- Key Laboratory of Synthetic and Self-Assembly Chemistry for Organic Functional Molecules, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, 345 Lingling Road, Shanghai, 200032, People's Republic of China
| | - Xiaoyu Huang
- Key Laboratory of Synthetic and Self-Assembly Chemistry for Organic Functional Molecules, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, 345 Lingling Road, Shanghai, 200032, People's Republic of China.
| |
Collapse
|
26
|
Brals J, Smith JD, Ibrahim F, Gallou F, Handa S. Micelle-Enabled Palladium Catalysis for Convenient sp2-sp3 Coupling of Nitroalkanes with Aryl Bromides in Water Under Mild Conditions. ACS Catal 2017. [DOI: 10.1021/acscatal.7b02663] [Citation(s) in RCA: 60] [Impact Index Per Article: 8.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
Affiliation(s)
- Jeremy Brals
- Department
of Chemistry, University of Louisville, 2320 S. Brook Street, Louisville, Kentucky 40292, United States
| | - Justin D. Smith
- Department
of Chemistry, University of Louisville, 2320 S. Brook Street, Louisville, Kentucky 40292, United States
| | - Faisal Ibrahim
- Department
of Chemistry, University of Louisville, 2320 S. Brook Street, Louisville, Kentucky 40292, United States
| | | | - Sachin Handa
- Department
of Chemistry, University of Louisville, 2320 S. Brook Street, Louisville, Kentucky 40292, United States
| |
Collapse
|
27
|
Lübtow MM, Hahn L, Haider MS, Luxenhofer R. Drug Specificity, Synergy and Antagonism in Ultrahigh Capacity Poly(2-oxazoline)/Poly(2-oxazine) based Formulations. J Am Chem Soc 2017; 139:10980-10983. [PMID: 28750162 DOI: 10.1021/jacs.7b05376] [Citation(s) in RCA: 69] [Impact Index Per Article: 9.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
Abstract
Polymer micelles offer the possibility to create a nanoscopic environment that is distinct from the bulk phase. They find applications in catalysis, drug delivery, cleaning, etc. Often, one simply distinguishes between hydrophilic and hydrophobic, but fine-tuning of the microenvironment is possible by adjusting the structure of the polymer amphiphile. Here, we investigated a small library of structurally similar amphiphiles based on poly(2-oxazoline)s and poly(2-oxazine)s with respect to their solubilization capacity for two extremely water insoluble drugs, curcumin and paclitaxel. We found very significant and orthogonal specificities even if only one methylene group is exchanged between the polymer backbone and side chain. More strikingly, we observed profound synergistic and antagonistic solubilization patterns for the coformulation of the two drugs. Our findings shed new light on host-guest interaction in polymer micelles and such pronounced host-guest specificities in polymer micelles may not only be interesting in drug delivery but also for applications such as micellar catalysis.
Collapse
Affiliation(s)
- Michael M Lübtow
- Functional Polymer Materials, Chair for Chemical Technology of Material Synthesis and the Bavarian Polymer Institute, University of Würzburg , Röntgenring 11, 97070 Würzburg, Germany
| | - Lukas Hahn
- Functional Polymer Materials, Chair for Chemical Technology of Material Synthesis and the Bavarian Polymer Institute, University of Würzburg , Röntgenring 11, 97070 Würzburg, Germany
| | - Malik Salman Haider
- Functional Polymer Materials, Chair for Chemical Technology of Material Synthesis and the Bavarian Polymer Institute, University of Würzburg , Röntgenring 11, 97070 Würzburg, Germany
| | - Robert Luxenhofer
- Functional Polymer Materials, Chair for Chemical Technology of Material Synthesis and the Bavarian Polymer Institute, University of Würzburg , Röntgenring 11, 97070 Würzburg, Germany
| |
Collapse
|
28
|
Sand H, Weberskirch R. Chemoenzymatic one-pot reaction of noncompatible catalysts: combining enzymatic ester hydrolysis with Cu(i)/bipyridine catalyzed oxidation in aqueous medium. RSC Adv 2017. [DOI: 10.1039/c7ra05451c] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023] Open
Abstract
Combination of a lipase (CALB) with a Cu/bipyridine catalyst for environmentally benign synthesis of aldehydes from their corresponding esters.
Collapse
Affiliation(s)
- Henning Sand
- Faculty of Chemistry and Chemical Biology
- TU Dortmund
- D 44227 Dortmund
- Germany
| | - Ralf Weberskirch
- Faculty of Chemistry and Chemical Biology
- TU Dortmund
- D 44227 Dortmund
- Germany
| |
Collapse
|
29
|
Sun F, Lu G, Feng C, Li Y, Huang X. A PHEA-g-PEO well-defined graft copolymer exhibiting the synchronous encapsulation of both hydrophobic pyrene and hydrophilic Rhodamine 6G. Polym Chem 2017. [DOI: 10.1039/c6py01595f] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
This article reports the synthesis of a well-defined PHEA-g-PEO graft copolymer by the combination of RAFT polymerization, Cu(i)-mediated ATNRC, and the grafting-onto strategy, which could encapsulate hydrophilic R6G and hydrophobic pyrene simultaneously.
Collapse
Affiliation(s)
- Fangxu Sun
- Key Laboratory of Synthetic and Self-Assembly Chemistry for Organic Functional Molecules
- Shanghai Institute of Organic Chemistry
- Chinese Academy of Sciences
- Shanghai 200032
- People's Republic of China
| | - Guolin Lu
- Key Laboratory of Synthetic and Self-Assembly Chemistry for Organic Functional Molecules
- Shanghai Institute of Organic Chemistry
- Chinese Academy of Sciences
- Shanghai 200032
- People's Republic of China
| | - Chun Feng
- Key Laboratory of Synthetic and Self-Assembly Chemistry for Organic Functional Molecules
- Shanghai Institute of Organic Chemistry
- Chinese Academy of Sciences
- Shanghai 200032
- People's Republic of China
| | - Yongjun Li
- Key Laboratory of Synthetic and Self-Assembly Chemistry for Organic Functional Molecules
- Shanghai Institute of Organic Chemistry
- Chinese Academy of Sciences
- Shanghai 200032
- People's Republic of China
| | - Xiaoyu Huang
- Key Laboratory of Synthetic and Self-Assembly Chemistry for Organic Functional Molecules
- Shanghai Institute of Organic Chemistry
- Chinese Academy of Sciences
- Shanghai 200032
- People's Republic of China
| |
Collapse
|
30
|
Hosseyni S, Smith CA, Shi X. Gold-Catalyzed Vinyl Ether Hydroalkynylation: An Alternative Pathway for the Gold-Catalyzed Intermolecular Reaction of Alkenes and Alkynes. Org Lett 2016; 18:6336-6339. [PMID: 27978688 PMCID: PMC6430632 DOI: 10.1021/acs.orglett.6b03228] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Abstract
In this report, the gold-catalyzed intermolecular reaction of vinyl ethers and terminal alkynes is investigated. Utilizing a triazole gold catalyst lessens gold decomposition in the presence of the vinyl ether and affords an alkynylation product instead of the [2 + 2] product. This protocol has been expanded to include glycal substrates, which undergo a one-pot alkynylation-Ferrier reaction to produce functionalized sugars in moderate to excellent yields with high diastereoselectivity.
Collapse
Affiliation(s)
- Seyedmorteza Hosseyni
- The Department of Chemistry, University of South Florida, 4202 East Fowler Avenue, Tampa, Florida 33620, United States
| | - Courtney A. Smith
- The Department of Chemistry, University of South Florida, 4202 East Fowler Avenue, Tampa, Florida 33620, United States
| | - Xiaodong Shi
- The Department of Chemistry, University of South Florida, 4202 East Fowler Avenue, Tampa, Florida 33620, United States
| |
Collapse
|
31
|
Wagner B, Belger K, Minkler S, Belting V, Krause N. Sustainable gold catalysis: synthesis of new spiroacetals. PURE APPL CHEM 2016. [DOI: 10.1515/pac-2016-0406] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Abstract
AbstractVarious [O,O]- and [N,O]-spiroacetals were synthesized by gold-catalyzed spirocyclization of suitable functionalized alkynes. Whereas simple spiroacetals with two heteroatoms were readily obtained by regioselective cyclization of acetylenic diols or aminoalcohols, hitherto unknown spirocyclic isoxazolidines and pyrazolidines bearing three heteroatoms were formed by three-component coupling of alkynols, aldehydes, and protected hydroxylamine or hydrazine derivatives. The sustainability of these spirocyclizations was improved by using recyclable gold catalysts in water or nanomicelles as reaction medium.
Collapse
Affiliation(s)
- Bernd Wagner
- 1Organic Chemistry, Dortmund University of Technology, Otto-Hahn-Strasse 6, D-44227 Dortmund, Germany
| | - Katrin Belger
- 1Organic Chemistry, Dortmund University of Technology, Otto-Hahn-Strasse 6, D-44227 Dortmund, Germany
| | - Stefan Minkler
- 1Organic Chemistry, Dortmund University of Technology, Otto-Hahn-Strasse 6, D-44227 Dortmund, Germany
| | - Volker Belting
- 1Organic Chemistry, Dortmund University of Technology, Otto-Hahn-Strasse 6, D-44227 Dortmund, Germany
| | - Norbert Krause
- 1Organic Chemistry, Dortmund University of Technology, Otto-Hahn-Strasse 6, D-44227 Dortmund, Germany
| |
Collapse
|
32
|
Lempke L, Sak H, Kubicki M, Krause N. Gold-catalyzed cycloisomerization of trifluoromethylated allenols: sustainability and mechanistic studies. Org Chem Front 2016. [DOI: 10.1039/c6qo00423g] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
Trifluoromethyl-substituted α-allenols are cyclized to the corresponding 2,5-dihydrofurans in the presence of neutral or cationic gold catalysts.
Collapse
Affiliation(s)
- Linda Lempke
- Dortmund University of Technology
- Organic Chemistry
- D-44227 Dortmund
- Germany
| | - Hülya Sak
- Dortmund University of Technology
- Organic Chemistry
- D-44227 Dortmund
- Germany
| | - Michael Kubicki
- Dortmund University of Technology
- Organic Chemistry
- D-44227 Dortmund
- Germany
| | - Norbert Krause
- Dortmund University of Technology
- Organic Chemistry
- D-44227 Dortmund
- Germany
| |
Collapse
|