1: 1. 54.3percent sodium hydride in mineral oil / 1. DMSO, 40 degC, until hydrogen evolution ceased; 2. below 30 degC, 15 min. 2: phenyltrimethylammonium tribromide / tetrahydrofuran / 18 h / 35 °C View Scheme

diethylaluminium chloride in dichloromethane T=0°C; Acylation; 2 h;

diethyl ether