ethanol; sodium 18 h; Heating;

1.1: 81 percent / LiI / dimethylformamide / 12 h / Heating 2.1: ozone; oxygen; acetic acid / CH2Cl2 / -4 - -2 °C 2.2: 98 percent / sodium triacetoxyborohydride / CH2Cl2 / 3 h / 20 °C View Scheme

lithium iodide in N,N-dimethyl-formamide 12 h; Heating;