1: 82.4 percent / 5percent NaOH / 1 h / 55 - 60 °C 2: 69.5 percent / POCl3 / 2 h / Heating 3: 2-methyl-propan-2-ol / 3 h / Heating 4: 79.6 percent / conc. HCl / H2O / 1 h / 60 - 70 °C 5: 73.9 percent / H2 / 10percent palladium on charcoal / methanol; H2O / 65 - 70 °C / 15200 Torr View Scheme

1: 82.4 percent / 5percent NaOH / 1 h / 55 - 60 °C 2: 69.5 percent / POCl3 / 2 h / Heating 3: 2-methyl-propan-2-ol / 3 h / Heating 4: 79.6 percent / conc. HCl / H2O / 1 h / 60 - 70 °C 5: 73.9 percent / H2 / 10percent palladium on charcoal / methanol; H2O / 65 - 70 °C / 15200 Torr 6: 80.9 percent / 47percent HBr / 2.5 h / Heating 7: 83.4 percent / conc. HCl / 0.33 h / 70 - 80 °C View Scheme

sodium hydroxide T=55 - 60°C; 1 h;

1: 82.4 percent / 5percent NaOH / 1 h / 55 - 60 °C 2: 69.5 percent / POCl3 / 2 h / Heating View Scheme