1: 2.) p-toluenesulfonic acid / 1.) toluene, ref;ux, 30 min, 2.) toluene, reflux, 3 h 2: 41 percent / O2, cupric chloride, dimethylamine / dimethylformamide; H2O View Scheme

1.1: 64 percent / morpholine / toluene / 3 h / Heating 2.1: [(CH3)3Si]2NLi / tetrahydrofuran / 0.5 h / -78 °C 2.2: 53 percent / (2R,8aS)-(+)-(camphorylsulfonyl)oxaziridine / tetrahydrofuran / 3 h / -78 °C View Scheme