osmium(VIII) oxide; N,N,N',N,-tetramethylethylenediamine in dichloromethane T=-78°C;

1: 1,5-anhydro-2,3-dideoxy-D-erythro-hex-2-enitol With osmium(VIII) oxide; 4-methylmorpholine N-oxide in water; acetone 2: acetic anhydride With pyridine; 4-(N,N-dimethlyamino)pyridine T=20°C; 48 h;