S. Torii et al., CARBONYLATIVE [2-LACTAM SKELETON WITH PALLADIUM CATALYST(2] CYCLOADDITION FOR THE CONSTRUCTION OF BETA), Tetrahedron letters, 34(41), 1993, pp. 6553-6556
Palladium-catalyzed carbonylation of allyl diethyl phosphate in the pr
esence of imines under CO pressure (30 Kgcm-2) gave highly stereoselec
tively either cis- or trans-3-vinyl-beta-lactam compounds, depending o
n the nature of the imines employed, in high yields.