1: bromobenzene With magnesium 2: cyclopropane carboxylic acid cyanide in diethyl ether T=25°C; 1.58333 h; 3: With sulfuric acid in diethyl ether; water T=10 - 25°C;

hydrogen bromide; lithium bromide in water T=0°C; 2 h; Inert atmosphere;

1.1: iodine; magnesium / tetrahydrofuran / 2 h / 20 °C / Inert atmosphere 1.2: 1 h / 0 - 20 °C / Inert atmosphere 1.3: Inert atmosphere 2.1: hydrogen bromide; lithium bromide / water / 2 h / 0 °C / Inert atmosphere View Scheme

1: in tetrahydrofuran T=0°C; 2: With acetyl chloride in tetrahydrofuran T=50°C; 1 h;