jones reagent in acetone T=20°C; 3 h;

1: 676 mg / 110 °C 2: 100 percent / HF*pyridine / tetrahydrofuran / 6 h / 20 °C 3: 83 percent / Jones reagent / acetone / 3 h / 20 °C View Scheme

1: Et3N; diphenylphosphoryl azide / toluene / 2 h / Heating 2: 676 mg / 110 °C 3: 100 percent / HF*pyridine / tetrahydrofuran / 6 h / 20 °C 4: 83 percent / Jones reagent / acetone / 3 h / 20 °C View Scheme

chloro-trimethyl-silane; N-ethyl-N,N-diisopropylamine 1.) CH2Cl2, 60 deg C, 1 h, 2.) CH2Cl2, 50 deg C, 2 h; Multistep reaction;