Reaction of triphenylbismuthonium 2-oxoalkylides with benzils. A novel one-pot conversion of symmetrical 1,2-diketones into O-aroyl enolates of unsymmetrical 1,3-diketones
Abstract
Triphenylbismuthonium 2-oxoalkylide 1, generated in situ from the corresponding onium salt 2 and base in THF at low temperatures, reacts with benzils 3 to give O-aroyl enolates of unsymmetrical 1,3-diketones 4 in moderate to good yields.