Efficient esterification of eugenol using a microwave-activated waste kaolin

Abstract: Eugenyl acetate has been investigated because of its beneficial bioactive antioxidant, antimicrobial and potential properties against the development of Aedes aegypti larvae. Here, we report, for the first time, the use of a catalyst prepared from flint kaolin with microwave irradiation for the acetylation of eugenol. A few kinetic parameters were evaluated in the experiments used for eugenol ester synthesis. High conversions (98%) were obtained after 1 h of reaction. The prepared material shows good activity (over 90%) even after 4 cycles of use. Therefore, the use of microwave radiation made it possible to prepare a catalyst in a very short time using a low-cost industrial by-product as a raw material that proved to be highly active, in addition to the additional advantage of being reusable, which would reduce possible environmental impacts caused by its disposal in the environment. Graphic abstract: [Figure not available: see fulltext.]. © 2020, Akadémiai Kiadó, Budapest, Hungary.

De Oliveira A.N. , De Oliveira D.T. , Angélica R.S.5 , Andrade E.H.A.1, 6 , Da Silva J.K.R. , Rocha Filho G.N. , Coral N.7 , Pires L.H.O.7 , Luque R. 8, 9 , Do Nascimento L.A.S.
Springer Netherlands
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  • 1 Graduation Program in Chemistry, Universidade Federal do Pará, Augusto Corrêa Street, Guamá, Belém, PA 66075-110, Brazil
  • 2 Laboratory of Oils of the Amazon, Universidade Federal do Pará, Perimetral Avenue, Guamá, Belém, PA 66075-750, Brazil
  • 3 Department of Exact and Technologic Sciences, Universidade Federal do Amapá, Rod. Juscelino Kubitschek, km 02-Jardim Marco Zero, Macapá, AP 68903-419, Brazil
  • 4 Graduation Program in Biotechnology, Universidade Federal do Pará, Augusto Corrêa Street, Guamá, Belém, PA 66075-110, Brazil
  • 5 Laboratory of X-Ray Diffraction, Universidade Federal Do Pará, Augusto Corrêa Street, Guamá, Belém, PA 66075-110, Brazil
  • 6 Adolpho Ducke Laboratory, Botany Coordinating, Museu Paraense Emílio Goeldi, Perimetral Avenue, Terra Firme, Belém, PA 66077-830, Brazil
  • 7 High School of Application, Universidade Federal do Pará, Belém, Pará CEP 66095-780, Brazil
  • 8 Faculty of Sciences, Research Institute of Chemistry, Peoples Friendship University of Russia, RUDN University), 6 Miklukho Maklaya str., Moscow, 117198, Russian Federation
  • 9 Department of Organic Chemistry, Universidad de Córdoba, Ctra Nnal IV-A, Km 396, Córdoba, 14014, Spain
Ключевые слова
Esterification; Eugenol; Eugenyl acetate; Flint kaolin; Heterogeneous catalysis; Microwaves
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