Journal
APPLIED ORGANOMETALLIC CHEMISTRY
Volume 37, Issue 1, Pages -Publisher
WILEY
DOI: 10.1002/aoc.6933
Keywords
heterogeneous catalysts; multicomponent reaction; N-sulfonic acid; polystyrene; pyrroles
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An efficient acid-catalyzed synthesis of 1,5-diaryl-3-(arylamino)-1H-pyrrol-2(5H)-ones is reported using a novel polymer catalyst, which can be easily regenerated and reused. The catalyst was characterized using various analytical techniques, and it showed high product yield and a simple work-up procedure.
An efficient acid-catalyzed synthesis of 1,5-diaryl-3-(arylamino)-1H-pyrrol-2(5H)-ones is reported using novel N-sulfonic acid modified poly (styrene-diethylenetriamine) through three-component reaction between aldehyde, amine, and ethyl pyruvate in high yields and short times. This heterogeneous solid catalyst is produced by reacting amine-modified chloromethyl polystyrene with neat chlorosulfonic acid. The structure of the synthesized catalyst was examined with Fourier transform-infrared spectroscopy (FT-IR), X-ray diffraction (XRD), dynamic light scattering (DLS), thermogravimetric analysis (TGA), differential thermal analysis (DTA), scanning electron micrograph (SEM), Brunauer-Emmett-Teller (BET), energy dispersive spectroscopy (EDS), and elemental analyses. The heterogeneous catalyst has many advantages, including an easy work-up procedure, a high product yield, and the capability to be easily regenerated and reused for at least five cycles without losing its activity.
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