HOMO-DIELS-ALDER AND ENE REACTIONS OF PHOSPHAALKYNES

Article abstract of DOI:10.1016/S0040-4039(00)82016-X

Cycloalka-1,3-dienes 1 and 6 react with phosphaalkynes 2 to form the bicyclic systems 3 and 7 containing λ³?²-phosphorus atoms.Products 3 and 7 react with a further equivalent of 2 to furnish the tetracycles 4 and 8 by way of a previously unknown homo-Diels-Alder reaction.The ene reaction 9 + 2 - 10 defines the limits of the cycloaddition process.