Mo(CO)3(CN-t-Bu)3; tetrabutyl ammonium fluoride; hydroquinone in tetrahydrofuran T=60 - 65°C; 3 h; Inert atmosphere; Overall yield = 90 percent; Overall yield = 312 mg;

catalyst: azobis(isobutyronitrile) in neat (no solvent) catalyst addn. to mixt. of Bu3SnH and propargyl acolhol under argon, stirring (2 h, 80°C); flash chromy. (silica gel column, ethyl acetate/hexane);

tetrakis(triphenylphosphine) palladium(0) in benzene hydrostannylation, at room temperature, mixture was stood for 10 minutes; removal of solvent (vacuo), flash chromy. (silica gel, dichloromethane);