Artículos de revistas
Ketalization of ketones to 1,3-dioxolanes and concurring self-aldolization catalyzed by an amorphous, hydrophilic SiO2-SO3H catalyst under microwave irradiation
Fecha
2018-08-01Registro en:
Journal of the Brazilian Chemical Society, v. 29, n. 8, p. 1663-1671, 2018.
1678-4790
0103-5053
10.21577/0103-5053.20180039
S0103-50532018000801663
2-s2.0-85049001344
S0103-50532018000801663.pdf
Autor
Universidade Federal de Viçosa (UFV)
Universidade de São Paulo (USP)
Universidade Estadual Paulista (Unesp)
Institución
Resumen
The amorphous, mesoporous SiO2-SO3H catalyst with a surface area of 115 m2 g-1 and 1.32 mmol H+ per g was very efficient for the protonation of ketones on a 10% (m/m) basis, and the catalyst-bound intermediates can be trapped by polyalcohols to produce ketals in high yields or suffer aldol condensations within minutes under low-power microwave irradiation. The same catalyst can easily reverse the ketalization reaction. Printed in Brazil-