1: lithium tert-butylate; methanol / tetrahydrofuran; N,N-dimethyl-formamide / 2 h / 0 °C 2: palladium 10 on activated carbon; hydrogen / ethanol / 20 °C / 3000.3 - 3750.38 Torr / |Autoclave 3: triethylamine / dichloromethane / 18 h / 0 - 20 °C 4: 5 h / 70 °C 5: pyridine / 1 h / 0 - 20 °C 6: palladium 10 on activated carbon; hydrogen / ethanol / 18 h / 50 - 55 °C / 3000.3 - 3750.38 Torr View Scheme