Catalytic asymmetric cyclopropanation with diazooxindole

Abstract

The first catalytic asymmetric cyclopropanation using styrene and diazooxindole was achieved with Rh2(S-PTTL)4. The reaction proceeded smoothly with 1 mol% catalyst loading to provide a good yield of the biologically important spiro-cyclopropyloxindole product with moderate to good enantioselectivity and excellent diastereoselectivity. © Georg Thieme Verlag Stuttgart · New York.