1
|
Novikova D, Grigoreva T, Gurzhiy V, Tribulovich V. Is It Possible to Obtain a Product of the Desired Configuration from a Single Knoevenagel Condensation? Isomerization vs. Stereodefined Synthesis. Int J Mol Sci 2023; 24:11339. [PMID: 37511099 PMCID: PMC10379276 DOI: 10.3390/ijms241411339] [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: 06/09/2023] [Revised: 07/07/2023] [Accepted: 07/10/2023] [Indexed: 07/30/2023] Open
Abstract
The biological activity of compounds directly depends on the three-dimensional arrangement of affinity fragments since a high degree of pharmacophore compliance with the binding site is required. 3-Benzylidene oxindoles are privileged structures due to their wide spectrum of biological activity, synthetic availability, and ease of modification. In particular, both kinase inhibitors and kinase activators can be found among 3-benzylidene oxindoles. In this work, we studied model compounds obtained via oxindole condensation with aldehydes and alkylphenones. These condensation products can exist in the form of E- and Z-isomers and also undergo isomerization in solutions. The factors causing isomeric transformation of these compounds were established. Comparative kinetic studies to obtain quantitative characteristics of UV-driven isomerization were first performed. The results obtained indicate dramatic differences in two subclasses, which should be considered when developing biologically active molecules.
Collapse
Affiliation(s)
- Daria Novikova
- Laboratory of Molecular Pharmacology, St. Petersburg State Institute of Technology (Technical University), St. Petersburg 190013, Russia
| | - Tatyana Grigoreva
- Laboratory of Molecular Pharmacology, St. Petersburg State Institute of Technology (Technical University), St. Petersburg 190013, Russia
| | - Vladislav Gurzhiy
- Crystallography Department, Institute of Earth Sciences, St. Petersburg State University, St. Petersburg 199034, Russia
| | - Vyacheslav Tribulovich
- Laboratory of Molecular Pharmacology, St. Petersburg State Institute of Technology (Technical University), St. Petersburg 190013, Russia
| |
Collapse
|
2
|
Chitin and Silk Fibroin Biopolymers Modified by Oxone: Efficient Heterogeneous Catalysts for Knoevenagel Reaction. Catalysts 2022. [DOI: 10.3390/catal12080904] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
Abstract
New materials from silk fibroin (FS-Ox) and chitin (CT-Ox) functionalized with Oxone® salt were developed for application in the synthesis of Knoevenagel adducts. The experiments were performed using benzaldehyde derivatives, malononitrile, and a mixture of water and ethanol as green solvents. The efficiency of conventional and microwave irradiation as heating sources for this reaction was also investigated. When the reactions were performed for 60 min under optimized conditions with conventional heating, twelve Knoevenagel adducts 2a–l were obtained, with good yields for both catalysts (CT-Ox 60–98% and FS-Ox 71–98%). When microwave irradiation was used, the reaction periods were reduced twelvefold, with the same Knoevenagel adducts with good CT-Ox (39–99%) and FS-Ox (35–99%) yields obtained in most cases. The reuse of these materials as catalysts in successive reactions was also evaluated, and CT-Ox FS-Ox were successfully used for 4 and 2 cycles, respectively. The results presented prove the efficiency of the CT-OxFS-Ox catalyst as a promising low-cost and reusable material with suitable catalytic properties to be applied in the aldol condensation reaction in a sustainable way.
Collapse
|
3
|
Singh SK, Mishra N, Kumar S, Jaiswal MK, Tiwari VK. Growing Impact of Carbohydrate‐Based Organocatalysts. ChemistrySelect 2022. [DOI: 10.1002/slct.202201314] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Sumit K. Singh
- Department of Chemistry Institute of Science Banaras Hindu University Varanasi 221005 INDIA
| | - Nidhi Mishra
- Department of Chemistry Institute of Science Banaras Hindu University Varanasi 221005 INDIA
| | - Sunil Kumar
- Department of Chemistry Institute of Science Banaras Hindu University Varanasi 221005 INDIA
| | - Manoj K. Jaiswal
- Department of Chemistry Institute of Science Banaras Hindu University Varanasi 221005 INDIA
| | - Vinod K. Tiwari
- Department of Chemistry Institute of Science Banaras Hindu University Varanasi 221005 INDIA
| |
Collapse
|
4
|
Johari S, Johan MR, Khaligh NG. An Overview of Metal-free Sustainable Nitrogen-based Catalytic Knoevenagel Condensation Reaction . Org Biomol Chem 2022; 20:2164-2186. [DOI: 10.1039/d2ob00135g] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Knoevenagel condensation reaction counts as a vital condensation in organic chemistry due to the synthesis of valuable intermediates, heterocycles, and fine chemicals from commercially available reactants through forming new C=C...
Collapse
|
5
|
Khan D, Parveen I, Shaily, Sharma S. Design, Synthesis and Characterization of Aurone Based α,β‐unsaturated Carbonyl‐Amino Ligands and their Application in Microwave Assisted Suzuki, Heck and Buchwald Reactions. ASIAN J ORG CHEM 2021. [DOI: 10.1002/ajoc.202100638] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Affiliation(s)
- Danish Khan
- Department of Chemistry Indian Institute of Technology Roorkee Roorkee 247 667 Uttarakhand India
| | - Iram Parveen
- Department of Chemistry Indian Institute of Technology Roorkee Roorkee 247 667 Uttarakhand India
| | - Shaily
- Department of Chemistry D. B. S. (P.G.) College Dehradun 248001 Uttarakhand India
| | - Saurabh Sharma
- Department of Chemistry Indian Institute of Technology Roorkee Roorkee 247 667 Uttarakhand India
| |
Collapse
|
6
|
Wojaczyńska E, Steppeler F, Iwan D, Scherrmann MC, Marra A. Synthesis and Applications of Carbohydrate-Based Organocatalysts. Molecules 2021; 26:7291. [PMID: 34885873 PMCID: PMC8659088 DOI: 10.3390/molecules26237291] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/04/2021] [Revised: 11/22/2021] [Accepted: 11/24/2021] [Indexed: 12/22/2022] Open
Abstract
Organocatalysis is a very useful tool for the asymmetric synthesis of biologically or pharmacologically active compounds because it avoids the use of noxious metals, which are difficult to eliminate from the target products. Moreover, in many cases, the organocatalysed reactions can be performed in benign solvents and do not require anhydrous conditions. It is well-known that most of the above-mentioned reactions are promoted by a simple aminoacid, l-proline, or, to a lesser extent, by the more complex cinchona alkaloids. However, during the past three decades, other enantiopure natural compounds, the carbohydrates, have been employed as organocatalysts. In the present exhaustive review, the detailed preparation of all the sugar-based organocatalysts as well as their catalytic properties are described.
Collapse
Affiliation(s)
- Elżbieta Wojaczyńska
- Faculty of Chemistry, Wrocław University of Science and Technology, Wybrzeże Wyspiańskiego 27, 50 370 Wrocław, Poland
| | - Franz Steppeler
- Faculty of Chemistry, Wrocław University of Science and Technology, Wybrzeże Wyspiańskiego 27, 50 370 Wrocław, Poland
| | - Dominika Iwan
- Faculty of Chemistry, Wrocław University of Science and Technology, Wybrzeże Wyspiańskiego 27, 50 370 Wrocław, Poland
| | - Marie-Christine Scherrmann
- Institut de Chimie Moléculaire et des Matériaux d'Orsay (ICMMO), Université Paris-Saclay, Bâtiment 420, 91405 Orsay, France
| | - Alberto Marra
- Institut des Biomolécules Max Mousseron (IBMM-UMR 5247), Université de Montpellier, Pôle Chimie Balard Recherche, 1919 Route de Mende, 34293 Montpellier, France
| |
Collapse
|
7
|
Tan Sian Hui Abdullah HS, Aqlili Riana Mohd Asseri SN, Khursyiah Wan Mohamad WN, Kan SY, Azmi AA, Yong Julius FS, Chia PW. Green synthesis, characterization and applications of silver nanoparticle mediated by the aqueous extract of red onion peel. ENVIRONMENTAL POLLUTION (BARKING, ESSEX : 1987) 2021; 271:116295. [PMID: 33383429 DOI: 10.1016/j.envpol.2020.116295] [Citation(s) in RCA: 15] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/22/2020] [Revised: 12/03/2020] [Accepted: 12/10/2020] [Indexed: 06/12/2023]
Abstract
This manuscript describes the reuse of biowaste for the biosynthesis of silver nanoparticles (AgNPs) and their applications. In particular, we hypothesized that the phytochemicals in the onion peels could act as reductant for silver nanoparticles syntheses. AgNO3 solution (1 mmol) was added dropwise to an aqueous solution of onion peel extract in 3:7 ratio. The reaction mixture was subjected to heating at 90 °C for about 30 min. During the synthesis of the AgNPs, the change of the colour of solution was observed. The AgNPs solution was centrifuged to obtain the two layers, which consists of clear solution and solid layers at 12000 rpm for 30 min. The precipitate was filtered and was re-dispersed in deionised water (25 mL). The solution was centrifuged again to obtain the purified AgNPs. Subsequently, this solution was freeze dried for 48 h to afford the powdered AgNPs. In this work, the structure of the AgNPs were synthesized in spherical shape, with an average size of 12.5 nm observed in the Transmission electron microscopy (TEM) analysis. For catalytic application, the synthesized AgNPs could be applied as green catalyst to promote Knoevenagel and Hantzsch reactions. In most cases, the desired products were obtained in satisfactory yields. In addition, the AgNPs were found to be recyclable for the subsequent reactions. After five successive runs, the average isolated yields for both transformations were recorded to be 91% (Knoevenagel condensation) and 94% (Hantzsch reaction), which indicated that the existing AgNPs could apply as green catalyst in the field of organic synthesis. Furthermore, the AgNPs also showed satisfactory result in antioxidant activity. The current results indicate that the AgNPs can act as alternative antioxidant agent and green catalyst in mediating organic transformations.
Collapse
Affiliation(s)
| | | | | | - Su-Yin Kan
- Faculty of Health Sciences, Universiti Sultan Zainal Abidin, Terengganu, Malaysia
| | - Alyza Azzura Azmi
- Faculty of Science and Marine Environment, Universiti Malaysia Terengganu, Terengganu, Malaysia
| | - Fu Siong Yong Julius
- Institute of Marine Biotechnology, Universiti Malaysia Terengganu, Terengganu, Malaysia
| | - Poh Wai Chia
- Faculty of Science and Marine Environment, Universiti Malaysia Terengganu, Terengganu, Malaysia; Institute of Marine Biotechnology, Universiti Malaysia Terengganu, Terengganu, Malaysia; Eco-Innovation Research Interest Group, Faculty Science and Marine Environment, Universiti Malaysia Terengganu, Terengganu, Malaysia.
| |
Collapse
|
8
|
Nomaki H, Chen C, Oda K, Tsuchiya M, Tame A, Uematsu K, Isobe N. Abundant Chitinous Structures in Chilostomella (Foraminifera, Rhizaria) and Their Potential Functions. J Eukaryot Microbiol 2021; 68:e12828. [PMID: 33128276 PMCID: PMC7894498 DOI: 10.1111/jeu.12828] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/14/2020] [Revised: 08/28/2020] [Accepted: 10/20/2020] [Indexed: 12/01/2022]
Abstract
Benthic foraminifera, members of Rhizaria, inhabit a broad range of marine environments and are particularly common in hypoxic sediments. The biology of benthic foraminifera is key to understanding benthic ecosystems and relevant biogeochemical cycles, especially in hypoxic environments. Chilostomella is a foraminiferal genus commonly found in hypoxic deep-sea sediments and has poorly understood ecological characteristics. For example, the carbon isotopic compositions of their lipids are substantially different from other co-occurring genera, probably reflecting unique features of its metabolism. Here, we investigated the cytoplasmic and ultrastructural features of Chilostomella ovoidea from bathyal sediments of Sagami Bay, Japan, based on serial semi-thin sections examined using an optical microscope followed by a three-dimensional reconstruction, combined with TEM observations of ultra-thin sections. Observations by TEM revealed the presence of abundant electron-dense structures dividing the cytoplasm. Based on histochemical staining, these structures are shown to be composed of chitin. Our 3D reconstruction revealed chitinous structures in the final seven chambers. These exhibited a plate-like morphology in the final chambers but became rolled up in earlier chambers (toward the proloculus). These chitinous, plate-like structures may function to partition the cytoplasm in a chamber to increase the surface/volume ratio and/or act as a reactive site for some metabolic functions.
Collapse
Affiliation(s)
- Hidetaka Nomaki
- SUGAR, X‐starJapan Agency for Marine‐Earth Science and Technology (JAMSTEC)2‐15 Natsushima‐choYokosukaKanagawa237‐0061Japan
| | - Chong Chen
- SUGAR, X‐starJapan Agency for Marine‐Earth Science and Technology (JAMSTEC)2‐15 Natsushima‐choYokosukaKanagawa237‐0061Japan
| | - Kaya Oda
- SUGAR, X‐starJapan Agency for Marine‐Earth Science and Technology (JAMSTEC)2‐15 Natsushima‐choYokosukaKanagawa237‐0061Japan
| | - Masashi Tsuchiya
- Research Institute for Global Change (RIGC)Japan Agency for Marine‐Earth Science and Technology (JAMSTEC)YokosukaKanagawa
237‐0061Japan
| | - Akihiro Tame
- Marine Works Japan Ltd.3‐54‐1 Oppamahigashi‐choYokosukaKanagawa237‐0063Japan
| | - Katsuyuki Uematsu
- Marine Works Japan Ltd.3‐54‐1 Oppamahigashi‐choYokosukaKanagawa237‐0063Japan
| | - Noriyuki Isobe
- Research Institute for Marine Resources Utilization (MRU)Japan Agency for Marine‐Earth Science and Technology (JAMSTEC)YokosukaKanagawa237‐0061Japan
| |
Collapse
|