Article ID Journal Published Year Pages File Type
1409140 Journal of Molecular Structure 2012 6 Pages PDF
Abstract

A series of Brønsted acids (HA) were immobilized on superparamagnetic γ-Fe2O3@SiO2. The synthesized [γ-Fe2O3@SiO2–HA] nanocrystallites were fully characterized by spectroscopic techniques (FT-IR, XRD, SEM, EDX) and used as solid acid catalysts in the synthesis of biologically important formamidines. The results were excellent in yield and time of reaction. Activity of various Brønsted acids on superparamagnetic support as catalyst were also evaluated and among them immobilized HBF4 showed the best catalytic properties.

► Magnetically recoverable catalyst afforded in enhancement simplicity. ► Product’s purity enhanced by efficient magnetic recovery. ► Green Brønsted acid catalyst. ► Mild, cost-effective and applicable efficient reusable heterogeneous catalyst. ► Environmentally benign method for synthesis of formamidines.

Related Topics
Physical Sciences and Engineering Chemistry Organic Chemistry
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