1: indole-2,3-dione With potassium carbonate; potassium iodide in acetonitrile T=45°C; Inert atmosphere; 2: 1-bromo-2-(bromomethyl)benzene in acetonitrile 17 h; Inert atmosphere;

1: With sodium hydride in tetrahydrofuran; hexane; N,N-dimethyl-formamide T=0°C; 0.5 h; 2: in tetrahydrofuran; hexane; N,N-dimethyl-formamide T=0 - 20°C;