Abstract
Methyl vinyl ketone was hydrodimerized to 2,7-octanedione in an alcoholic solution by CoX(bpy) 2 ( X = halogen, bpy = 2,2′-bipyridyl) prepared in situ from cobalt halides, 2,2′-bipyridyl, and zinc. The catalytic activity decreased in the order I > Br > Cl. The addition of alkali halides, of which sodium iodide was the most effective, gave higher yields of the hydrodimer in the presence of zinc. The cohydrodimerization between methyl vinyl ketone and excess methyl acrylate was carried out to yield methyl 6-ketoheptanoate and 2,7-octanedione in approximately equal ratio.
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