1: With 1-hydroxy-3H-benz[d][1,2]iodoxole-1,3-dione in dimethyl sulfoxide T=20°C; 2 h; 2: With (S)-(-)-α,α-diphenyl-2-pyrrolidinemethanol; 1-hydroxy-3H-benz[d][1,2]iodoxole-1,3-dione in dimethyl sulfoxide; acetonitrile T=20°C; 8 h; optical yield given as percent destereoselective reaction;