1: 37 percent / diethylaminosulphur trifluoride / CH2Cl2 / 18 h / Ambient temperature 2: 44 percent / diethylaminosulphur trifluoride / CH2Cl2 / Ambient temperature 3: 1.) potassium t-butoxide / 2.) 100 deg C, 1 h View Scheme

sodium hydride in tetrahydrofuran 16 h; Heating;

N-3,5-dimethylphenylcarbamoyl-derivatized cyclofructan-6 column in ethanol; n-heptane; trifluoroacetic acid T=20°C; Resolution of racemate;