Synthesis of environmentally friendly, magnetic acid-type calix[4]arene catalyst for obtaining Biginelli adducts
Carregando...
Data
Título da Revista
ISSN da Revista
Título de Volume
Editor
Universidade Federal de Minas Gerais
Descrição
Tipo
Artigo de periódico
Título alternativo
Primeiro orientador
Membros da banca
Resumo
An immobilized p-sulfonic acid calix[4]arene was synthesized on the surface of silica-coated Fe3O4 nanoparticles. Due to the combination of the magnetic recovery and the acid properties, it acted as a robust, safe and environmentally friendly catalyst for the one-pot synthesis of Biginelli adducts under microwave irradiation and solvent-free conditions. A series of Biginelli adducts were obtained in moderate to excellent yields, and most importantly, the catalyst could be easily recovered by an external magnet and reused five times without significant loss of catalytic activity (ca. 80% yield for all reuses using 0.64 mol% of the catalyst).
Abstract
Assunto
Nanopartículas, Calixarenos, Óxidos de ferro, Catalisadores, Catálise, Sílica, Precipitação (Química)
Palavras-chave
Fe3O4 nanoparticles, P-sulfonic acid calix[4]arene, Magnetic acid catalyst, Biginelli adducts
Citação
Departamento
Curso
Endereço externo
https://www.sciencedirect.com/science/article/pii/S1319610319300523