1.1: ZnCl2 / 0.5 h / 40 °C 1.2: SOCl2 / 2 h / 50 °C 1.3: K2CO3 / acetone / 96 h / Heating 2.1: LiBr; methyltriotcylammonium chloride / 1 h / 125 °C 3.1: 2.80 g / 48 h / 95 - 100 °C View Scheme

1: LiBr; methyltriotcylammonium chloride / 1 h / 125 °C 2: 2.80 g / 48 h / 95 - 100 °C View Scheme

1.1: ZnCl2 / 0.5 h / 40 °C 1.2: SOCl2 / 2 h / 50 °C 1.3: K2CO3 / acetone / 96 h / Heating 2.1: LiBr; methyltriotcylammonium chloride / 1 h / 125 °C 3.1: 2.80 g / 48 h / 95 - 100 °C View Scheme

T=95 - 100°C; 48 h;