Chemoselective Hydrogenation of Nitroarenes Catalyzed by Molybdenum Sulphide Clusters

Elena Pedrajas, Iván Sorribes, Artem L. Gushchin, Yuliya A. Laricheva, Kathrin Junge, Matthias Beller, Rosa Llusar

Research output: Contribution to journalArticlepeer-review

25 Citations (Scopus)

Abstract

Herein, we describe an atom efficient and general protocol for the chemoselective hydrogenation of nitroarenes to anilines catalyzed by well-defined diimino and diamino cubane-type Mo3S4 clusters. The novel diimino [Mo3S4Cl3(dnbpy)3]+ ([5]+) (dnbpy=4,4′-dinonyl-2,2′-dipyridyl, L1) trinuclear complex was synthesized in high yields by simple ligand substitution reactions starting from the thiourea (tu) [Mo3S4(tu)8(H2O)]Cl4⋅4 H2O (3) precursor. This strategy has also been successfully adapted for the isolation of the diamino [Mo3S4Cl3(dmen)3](BF4) ([6](BF4)), (dmen=N,N′-dimethylethylenediamine) salt. Applying these catalysts, high selectivity in the hydrogenation of functionalized nitroarenes has been accomplished. Over thirty anilines bearing synthetically functional groups have been synthesized in 70 to 99 % yield. Notably, the integrity of the cluster core is preserved during catalysis. Based on kinetic studies on the hydrogenation of nitrobenzene and other potential reaction intermediates, the direct reduction to aniline is the preferential route.

Original languageEnglish
Pages (from-to)1128-1134
Number of pages7
JournalChemCatChem
Volume9
Issue number6
DOIs
Publication statusPublished - 20 Mar 2017

Keywords

  • anilines
  • clusters
  • hydrogenation
  • molybdenum
  • nitroarenes
  • sulfides
  • COMPLEXES
  • IRON
  • DISULFIDE
  • HOMOGENEOUS HYDROGENATION
  • MILD
  • NANOPARTICLES
  • SELECTIVE HYDROGENATION
  • REDUCTION
  • NITRO-COMPOUNDS
  • METAL

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