ChemInform Abstract: Synthetic Potential of the Reaction of Allylic Phosphonium Ylides with α,β-Unsaturated Carbonyl Compounds

The reaction of triphenylphosphonium-2-propenylide (14) with mesityl oxide (9) is shown to proceed via initial Michael addition followed by trans ylidation and an intramolecular Wittig condensation to yield 1, 5, 5-trimethyl-1, 3-cyclohexadiene (10) as the reaction product.