1: cis-β-Carboline Acid With sodium hydride in N,N-dimethyl-formamide; paraffin oil T=0 - 20°C; Inert atmosphere; 2: methyl iodide in N,N-dimethyl-formamide; paraffin oil T=-10 - 20°C; 12 h; 3: With hydrogenchloride in water

1.1: palladium 10 on activated carbon / 1.5 h / |Inert atmosphere; |Reflux 2.1: sodium hydride / N,N-dimethyl-formamide; paraffin oil / 0 - 20 °C / |Inert atmosphere 2.2: 12 h / -10 - 20 °C View Scheme