Chemoselective and efficient catalytic hydrogenation of furfural by iridium and ruthenium half-sandwich complexes

Novisi K. Oklu, Banothile C.E. Makhubela

Research output: Contribution to journalArticlepeer-review

17 Citations (Scopus)

Abstract

The efficient hydrogenation reaction of furfural (FFR) to furfuryl alcohol (FFA) was achieved with new pyridyl-imine iridium(iii) and ruthenium(ii) complexes as catalyst precursors. The hydrogenation of furfural yielded furfuryl alcohol selectively with a turnover number (TON) of 2961 and turnover frequency (TOF) of 1481 h−1. The reactions were performed with formic acid as the source of hydrogen using a catalyst loading as low as 0.025 mol% and Et3N as base. The catalyst remained active for up to seven consecutive catalyst reuse cycles. Iridium outperformed the ruthenium analogues in terms of selectivity. Iridium hydride species were detected, duringin situ1H NMR spectroscopy studies, and are believed to be the active catalytic species. A mechanism of the hydrogenation reaction has hence been proposed.

Original languageEnglish
Pages (from-to)9382-9390
Number of pages9
JournalNew Journal of Chemistry
Volume44
Issue number22
DOIs
Publication statusPublished - 14 Jun 2020

ASJC Scopus subject areas

  • Catalysis
  • General Chemistry
  • Materials Chemistry

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