Rutheniumcluster als Katalysatoren für die Carbonylierung von cyclischen Aminen

Abstract

The tri- and tetra-nuclear ruthenium clusters Ru 3(CO) 12, [HRu 3(CO) 11] − and [H 3Ru 4(CO) 12] − have been found to catalyse the carbonylation of cyclic amines such as piperidine, 3-methylpiperidine, pyrrolidine, heptamethylene imine, morpholine and piperazine to give the corresponding formamides. The catalytic reaction works with only carbon monoxide or a mixture of carbon dioxide and hydrogen. In the case of the neutral catalyst precursor, carbamoyl clusters of the type (μ 2-H)Ru 3(CO) 10(μ 2,η 2-OCNR 2) have been isolated from the reaction mixture.