trifluorormethanesulfonic acid; 4 A molecular sieve in 1,4-dioxane T=20°C; 0.0833333 h;

1: 1-O-methyl-α,β-D-arabinofuranoside With pyridine; p-toluenesulfonyl chloride T=20°C; 48 h; 2: 2,2,2-trichloro-1-(phenylmethoxy)ethanimine With trifluorormethanesulfonic acid in 1,4-dioxane T=20°C; 3: With sodium iodide in ethylene glycol dimethyl ether T=90°C; 48 h;

1.1: hydrogenchloride / water / 12 h 1.2: 20 °C 2.1: pyridine; p-toluenesulfonyl chloride / 48 h / 20 °C 2.2: 20 °C 2.3: 48 h / 90 °C View Scheme