1: boric acid trimethyl ester; 2-fluoro-(5-trifluoromethyl)phenyl lithium With bis[2-(N,N-dimethylamino)ethyl] ether in hexane T=-15 - 20°C; Inert atmosphere; 2: hydrogenchloride in hexane; water T=20°C; Product distribution / selectivity;

1.1: bis[2-(N,N-dimethylamino)ethyl] ether / hexane / 1.5 h / -15 - -5 °C / Inert atmosphere 2.1: bis[2-(N,N-dimethylamino)ethyl] ether / hexane / -15 - 20 °C / Inert atmosphere 2.2: 20 °C View Scheme