A novel stereoselective approach to the ring system of the mitomycins is de
scribed. The synthesis was based on a convergent strategy involving a stere
ocontrolled addition of a beta -phenyl silyl enol ether to a pyrroline N-ac
yliminium ion followed by an intramolecular palladium-catalyzed aryl trifla
te amination to afford the (9R*,9aR*)-tetrahydropyrrolo[1,2-a]indole ring s
ystem.