Periodic Mesoporous Organosilica Containing Bridges with N-Sulfonic Acid Groups: a New Catalyst for the Efficient Formylation of Amines and Alcohols

In this study, periodic mesoporous organosilica containing bridges with N-sulfonic acid groups (SA-PMO), was easily prepared in two steps: (i) preparation of periodic mesoporous organosilica containing amine-bridges (AM-PMO) via co-condensation of bis[3-(trimethoxysilyl)propyl] amine and tetraethoxysilane and (ii) functionalization of AM-PMO with sulfonic acid. The formation and morphology of the reagent were confirmed by N2 adsorption-desorption isotherms, pH measurement, X-ray diffraction (XRD), transmission electron microscopy (TEM) and Fourier transform infrared FT-IR analysis. After identification, the catalytic ability of this reagent was investigated in the formylation of amines and alcohols using formic acid. Eco-friendly protocol, excellent yields, short reaction times, reusability of the catalyst and easy and quick isolation of the products are the main advantages of the presented method.