Catalysis and reaction mechanisms of N-formylation of amines using Fe(III)-exchanged sepiolite

Eren B., Aydin R., Eren E.

Chemical Papers, vol.68, no.5, pp.584-590, 2014 (SCI-Expanded, Scopus) identifier

  • Publication Type: Article / Article
  • Volume: 68 Issue: 5
  • Publication Date: 2014
  • Doi Number: 10.2478/s11696-013-0484-8
  • Journal Name: Chemical Papers
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Page Numbers: pp.584-590
  • Keywords: Catalysis, Formic acid, Ion-exchanged, N-formylation, Sepiolite
  • Bilecik Şeyh Edebali University Affiliated: Yes

Abstract

This study presents a rapid, economical and "green" N-formylation of anilines with formic acid (FA) using Fe(III)-exchanged sepiolite (IES) as a catalyst. The IES exhibited excellent catalytic properties and the reactions were complete within 20-90 min to afford products with high yields. The adsorption mechanism of FA on the IES sample was studied by infrared (IR) spectroscopy at a temperature range of 120-400°C. The thermal desorption of pyridine was detected by the IR technique to estimate the acidity of IES. Lewis acid-bound pyridine bands at 1618-1631 cm-1 and 1443-1445 cm -1 were observed even after the IES sample was heated above 400°C. © 2013 Institute of Chemistry, Slovak Academy of Sciences.