Synthesis and hydroboration of lipophilic hydroxypyridinones and their complexes with molybdenum(VI)

We have prepared four potentially lipophilic N-substituted hydroxypyridinon es containing unsaturated hydrocarbon groups. The propyl vinyl ether deriva tive (3) has been characterized by an X-ray diffraction study. Complexes of the type cis-MoO2L2, where L represents the hydroxypyridinonato ligands, h ave also been prepared. The pyridinone ligands are bound to molybdenum in a cis bidentate fashion via the deprotonated hydroxy groups and the ketone m oieties. Initial investigations into the hydroboration of the alkene groups in the pyridinone ligands and corresponding metal complexes is presented. Crystals of (3) are monoclinic, with a 10.466(1), b 13.388(1), c 15.386(2) Angstrom, beta 102.343(8)degrees, Z 8, space group P2(1)/n.