Ru(DMSO) 4 Cl 2 is catalytically active for converting aldehydes to primary amides via oxime intermediates. This catalyst is readily available, and requires no additional ligands, a great simplification compared to previous work. A Ru(II)/(IV) mechanism is proposed. ... Ru(DMSO) 4 Cl 2 , containing only DMSO and Cl ligands, is catalytically active for the conversion of aldehydes and oximes to amides, with no additives. ... Amides, which are valuable intermediates in organic ...