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(Reference retrieved automatically from SciELO through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Valorization of Hesperidin from Citrus Residues: Evaluation of Microwave-Assisted Synthesis of Hesperidin-Mg Complex and Their Insecticidal Activity

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Author(s):
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Danielle F. da Silva [1] ; João P. A. Bomfim [2] ; Rafael C. Marchi [3] ; Jéssica C. Amaral [4] ; Luciano S. Pinto [5] ; Rose M. Carlos [6] ; Antonio G. Ferreira [7] ; Moacir R. Forim [8] ; João B. Fernandes [9] ; Maria F. G. F. da Silva [10] ; Regiane C. de Oliveira [11] ; David Buss [12] ; William D. J. Kirk [13] ; Toby J. A. Bruce [14]
Total Authors: 14
Affiliation:
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[1] Universidade Federal de São Carlos. Departamento de Química - Brasil
[2] Universidade Estadual Paulista Júlio de Mesquita Filho. Faculdade de Ciências Agronômicas de Botucatu - Brasil
[3] Universidade Federal de São Carlos. Departamento de Química - Brasil
[4] Universidade Federal de São Carlos. Departamento de Química - Brasil
[5] Universidade Federal de São Carlos. Departamento de Química - Brasil
[6] Universidade Federal de São Carlos. Departamento de Química - Brasil
[7] Universidade Federal de São Carlos. Departamento de Química - Brasil
[8] Universidade Federal de São Carlos. Departamento de Química - Brasil
[9] Universidade Federal de São Carlos. Departamento de Química - Brasil
[10] Universidade Federal de São Carlos. Departamento de Química - Brasil
[11] Universidade Estadual Paulista Júlio de Mesquita Filho. Faculdade de Ciências Agronômicas de Botucatu - Brasil
[12] Keele University. School of Life Sciences - Ucrânia
[13] Keele University. School of Life Sciences - Ucrânia
[14] Keele University. School of Life Sciences - Ucrânia
Total Affiliations: 14
Document type: Journal article
Source: Journal of the Brazilian Chemical Society; v. 33, n. 7, p. 772-782, 2022-06-17.
Abstract

The aim of the current study was the valorization of hesperidin, the dominant flavonoid in citrus processing waste, by microwave-assisted synthesis of hesperidin-Mg complex, improving its antioxidant activity and insecticidal potential. Here we show, for the first time, that microwave-assisted synthesis of [Mg(hesp)2(phen)]OAc (1) (hesp: hesperidin, phen: phenanthroline) improve the reaction rate and yield. The nuclear magnetic resonance (NMR) experiments proved to be powerful tools for the identification of three isomers in metal complexes. Moreover, we explore the insecticidal potential of 1 and [Mg(phen)2(Isov)]OAc (2) (Isov : isovanillic acid) complexes against three insects. Complex 1 killed 80% of adults whitefly at 0.14 μmol L-1, and 2 76% at 0.36 μmol L-1. There was a total mortality of Spodoptera frugiperda with 2 at 0.39 μmol L-1, and 83% with 1 at 0.14 μmol L-1. Both have similar activity, and represent a novel group of insecticide for Bemisia tabaci and S. frugiperda; nevertheless, the benefits of both as Myzus persicae repellent require further evaluation. (AU)

FAPESP's process: 14/50249-8 - Green chemistry: sustainable synthetic methods employing benign solvents, safer reagents, and bio-renewable feedstock
Grantee:Arlene Gonçalves Corrêa
Support Opportunities: Research Grants - Research Centers in Engineering Program
FAPESP's process: 18/21201-8 - Novel delivery of phytochemicals for sustainable crop protection
Grantee:Maria Fátima das Graças Fernandes da Silva
Support Opportunities: Regular Research Grants