1: beta-CCM With sodium hydride in tetrahydrofuran; N,N-dimethyl-formamide T=20°C; 2: methyl iodide in tetrahydrofuran; N,N-dimethyl-formamide T=20°C; 5 h; 3: With hydrogenchloride; sodium hydrogencarbonate more than 3 stages;

sodium hydride in N,N-dimethyl-formamide T=20°C; 0.5 h;

sulfur in 1,4-dioxane; xylene 24 h; Heating;

1: 0.1N aq. NaOH / 48 h / 37 °C 2: HCl / 6 h / Heating 3: 60 percent / S / xylene; dioxane / 24 h / Heating View Scheme

1: HCl / 6 h / Heating 2: 60 percent / S / xylene; dioxane / 24 h / Heating View Scheme

methanol