The catalytic asymmetric synthesis of 3-substituted benzo-fused
sultams employing the Corey-Bakshi-Shibata reduction with
catecholborane of the corresponding cyclic N-sulfonylimines is
reported. Good to excellent yields (74-95%) and
enantiomeric excesses (69-94%) are obtained.
asymmetric synthesis - imine - reduction - catalysis - sulfonamide