ENDO-SELECTIVE ASYMMETRIC INVERSE ELECTRON-DEMAND 1,3-DIPOLAR CYCLOADDITION REACTION OF NITRONES

摘要

In the presence of a catalytic amount of the optically active cobalt(III) hexafluoroantimonate,the inverse electron-demand 1,3-dipolar cycloaddition reaction of dihydrofuran with nitrones bearing an electron-withdrawing group effectively proceeded to afford the corresponding adducts with excellent endo-selectivity.