copper(l) iodide; caesium carbonate; N-methyl-2-(methylamino)ethylamine in tetrahydrofuran T=80°C; 16 h; Inert atmosphere;

1.1: cesium hydroxide monohydrate / N,N-dimethyl-formamide / 0 °C / |Inert atmosphere 1.2: 0 - 20 °C / |Inert atmosphere 2.1: phenyllithium / tetrahydrofuran; hexane / 1.5 h / -78 - 20 °C / |Inert atmosphere View Scheme