Palladium-Assisted Regioselective Olefin Insertion into and β-Hydrogen Elimination of Hydrogen−Molybdenum and −Tungsten Bonds. Synthesis and Reactions of Heterodinuclear Hydrido Complexes of Palladium and Platinum with Molybdenum and Tungsten

Smooth reversible olefin insertion of ethyl acrylate, acrylonitrile, ethylene, dimethyl fumarate, and dimethyl maleate into MHCp(CO)3 (M = Mo (1a), W (1b)) has been catalyzed by Pd(PPh3)4 (4) or Pd(ethyl acrylate)(dppe) (8) at room temperature.丙烯酸乙酯、丙烯腈、乙烯、富马酸二甲酯与马来酸二甲酯向MHCp(CO)₃（M=Mo（1a）、W（1b））的平滑可逆烯烃插入反应，可在室温下由四(三苯基膦)钯(0)（Pd(PPh₃)₄，编号4）或(丙烯酸乙酯)双(二苯基膦基)乙烷合钯（Pd(ethyl acrylate)(dppe)，编号8）催化。