1: With 1,8-diazabicyclo[5.4.0]undec-7-ene in methanol T=0°C; 0.5 h; 2: With acetic anhydride; acetic acid; sodium nitrite T=0 - 20°C; 18 h; 3: With water; dihydrogen peroxide; lithium hydroxide hydrate in tetrahydrofuran T=0°C; 4 h; optical yield given as percent ee;