1: 90.5 percent / 25percent NH4OH / dioxane / 1 h 2: 94 percent / 1) 10percent Pd/C, H2 / methanol / Ambient temperature; 1) 1 h 3: 14.7 percent / Na, liq. NH3 View Scheme

1: 90.5 percent / 25percent NH4OH / dioxane / 1 h 2: 94 percent / 1) 10percent Pd/C, H2 / methanol / Ambient temperature; 1) 1 h 3: 22 percent / Na, liq. NH3 View Scheme