| Title: | Highly economic and waste valorization strategy for multicomponent and Knoevenagel reactions using water extract of tamarind seed ash |
| Author(s): | Naidu BR; Lakshmidevi J; Venkateswarlu K; Lakkaboyana SK; |
| Address: | "Laboratory for Synthetic & Natural Products Chemistry Department of Chemistry, Yogi Vemana University, Kadapa, 516005, India. Laboratory for Synthetic & Natural Products Chemistry Department of Chemistry, Yogi Vemana University, Kadapa, 516005, India. kvenkat@yogivemanauniversity.ac.in. Department of Chemistry Vel Tech Rangarajan Dr. Sagunthala R&D Institute of Science and Technology Avadi, Chennai, 600062, India" |
| Journal Title: | Environ Sci Pollut Res Int |
| DOI: | 10.1007/s11356-022-20124-1 |
| ISSN/ISBN: | 1614-7499 (Electronic) 0944-1344 (Linking) |
| Abstract: | "The application of solid organic waste-originated products in the preparation of synthetically and biologically significant compounds in aqueous media or pure water is a highly desired task in chemical synthesis that shows an effective solution to the circular economy and sustainable environment. In this article, we describe our research on the development of highly economic and sustainable protocols for the synthesis of biologically important oxygen-heterocycles (using a multicomponent reaction) and synthetically important olefins (via the Knoevenagel condensation reaction) using water extract of tamarind seed ash (WETS) as catalyst and aqueous reaction medium. The reactions are carried out at room temperature (RT) under toxic/problematic/volatile organic solvent-free conditions. Products of the current methods have been purified by using recrystallization technique. WETS was characterized from its FTIR, powder XRD, SEM, and EDAX data. Problematic and non-renewable solvents were avoided throughout the process from their synthesis to purification. The utilization of solid organic waste-originated catalyst and aqueous media, avoid of non-renewable substances as catalysts, media, separation solvents and promoters, and unobligating heating conditions can surely attract the attention of chemists towards exploring the waste-based products in chemical transformations" |
| Keywords: | *Water *Tamarindus Solvents/chemistry Catalysis Waste Products Aqueous medium Biorenewable catalyst Knoevenagel reaction Multicomponent reaction Wets Waste valorization; |
| Notes: | "MedlineNaidu, Bandameeda Ramesh Lakshmidevi, Jangam Venkateswarlu, Katta Lakkaboyana, Sivarama Krishna eng Germany 2022/04/21 Environ Sci Pollut Res Int. 2023 Jun; 30(28):71420-71429. doi: 10.1007/s11356-022-20124-1. Epub 2022 Apr 19" |
