hydrogen; palladium on activated charcoal in methanol Ambient temperature;

1: 55 percent / K2CO3 / acetone / 1 h 2: 97 percent / K2CO3 / dimethylformamide / 0.42 h / Heating 3: 89 percent / 10percent HCl / methanol / 0.67 h / Heating 4: 96 percent / K2CO3 / acetone / 0.17 h / Heating 5: 51 percent / K2CO3 / dimethylformamide / 0.33 h / Heating 6: 93 percent / LiAlH4 / diethyl ether / 1 h / Ambient temperature 7: 75 percent / BF3-etherate / dioxane / 1 h / Ambient temperature 8: 76 percent / H2 / 10percent Pd-C / methanol / Ambient temperature View Scheme

1: 96 percent / K2CO3 / acetone / 0.17 h / Heating 2: 51 percent / K2CO3 / dimethylformamide / 0.33 h / Heating 3: 93 percent / LiAlH4 / diethyl ether / 1 h / Ambient temperature 4: 75 percent / BF3-etherate / dioxane / 1 h / Ambient temperature 5: 76 percent / H2 / 10percent Pd-C / methanol / Ambient temperature View Scheme

1: 97 percent / K2CO3 / dimethylformamide / 0.42 h / Heating 2: 89 percent / 10percent HCl / methanol / 0.67 h / Heating 3: 96 percent / K2CO3 / acetone / 0.17 h / Heating 4: 51 percent / K2CO3 / dimethylformamide / 0.33 h / Heating 5: 93 percent / LiAlH4 / diethyl ether / 1 h / Ambient temperature 6: 75 percent / BF3-etherate / dioxane / 1 h / Ambient temperature 7: 76 percent / H2 / 10percent Pd-C / methanol / Ambient temperature View Scheme

1: 51 percent / K2CO3 / dimethylformamide / 0.33 h / Heating 2: 93 percent / LiAlH4 / diethyl ether / 1 h / Ambient temperature 3: 75 percent / BF3-etherate / dioxane / 1 h / Ambient temperature 4: 76 percent / H2 / 10percent Pd-C / methanol / Ambient temperature View Scheme

1: 93 percent / LiAlH4 / diethyl ether / 1 h / Ambient temperature 2: 75 percent / BF3-etherate / dioxane / 1 h / Ambient temperature 3: 76 percent / H2 / 10percent Pd-C / methanol / Ambient temperature View Scheme

1: 75 percent / BF3-etherate / dioxane / 1 h / Ambient temperature 2: 76 percent / H2 / 10percent Pd-C / methanol / Ambient temperature View Scheme

1: 89 percent / 10percent HCl / methanol / 0.67 h / Heating 2: 96 percent / K2CO3 / acetone / 0.17 h / Heating 3: 51 percent / K2CO3 / dimethylformamide / 0.33 h / Heating 4: 93 percent / LiAlH4 / diethyl ether / 1 h / Ambient temperature 5: 75 percent / BF3-etherate / dioxane / 1 h / Ambient temperature 6: 76 percent / H2 / 10percent Pd-C / methanol / Ambient temperature View Scheme

1: 29 percent / AlCl3 / acetonitrile / 0.25 h / Heating 2: 76 percent / H2 / 10percent Pd-C / methanol / Ambient temperature View Scheme

1: 65 percent / KOH / ethanol; H2O / 24 h / Ambient temperature 2: 83 percent / BF3-etherate / dioxane / 0.5 h / Ambient temperature 3: 29 percent / AlCl3 / acetonitrile / 0.25 h / Heating 4: 76 percent / H2 / 10percent Pd-C / methanol / Ambient temperature View Scheme