1: 74 percent / K2CO3 / dimethylformamide / 1 h / Heating 2: 88 percent / POCl3 / CH2Cl2 / Ambient temperature 3: 90 percent / Zn-amalgam, 4 N aq. HCl / dioxane / 2 h / Heating 4: H2 / 10percent Pd/C / ethyl acetate / 0.25 h / Ambient temperature 5: pyridine / 2 h / Heating 6: 68 percent / CrO3, water / acetic acid / 4 h / Ambient temperature 7: aq. KOH / 4 h / Heating View Scheme

1: 88 percent / POCl3 / CH2Cl2 / Ambient temperature 2: 90 percent / Zn-amalgam, 4 N aq. HCl / dioxane / 2 h / Heating 3: H2 / 10percent Pd/C / ethyl acetate / 0.25 h / Ambient temperature 4: pyridine / 2 h / Heating 5: 68 percent / CrO3, water / acetic acid / 4 h / Ambient temperature 6: aq. KOH / 4 h / Heating View Scheme

1: H2 / 10percent Pd/C / ethyl acetate / 0.25 h / Ambient temperature 2: pyridine / 2 h / Heating 3: 68 percent / CrO3, water / acetic acid / 4 h / Ambient temperature 4: aq. KOH / 4 h / Heating View Scheme

1: 90 percent / Zn-amalgam, 4 N aq. HCl / dioxane / 2 h / Heating 2: H2 / 10percent Pd/C / ethyl acetate / 0.25 h / Ambient temperature 3: pyridine / 2 h / Heating 4: 68 percent / CrO3, water / acetic acid / 4 h / Ambient temperature 5: aq. KOH / 4 h / Heating View Scheme

1: pyridine / 2 h / Heating 2: 68 percent / CrO3, water / acetic acid / 4 h / Ambient temperature 3: aq. KOH / 4 h / Heating View Scheme

1: 68 percent / CrO3, water / acetic acid / 4 h / Ambient temperature 2: aq. KOH / 4 h / Heating View Scheme

potassium hydroxide 4 h; Heating;