potassium hydride in ethylene glycol dimethyl ether 24 h; Ambient temperature;

1: 1-Bromonaphthalene With magnesium in diethyl ether; ethylene dibromide Inert atmosphereReflux; 2: chloro(1-naphthyl)silane in diethyl ether T=0 - 20°C; 3 h; Inert atmosphere;

in not given

1.1: magnesium / diethyl ether; ethylene dibromide / 2 h / Inert atmosphere; Reflux 1.2: 1 h / 20 °C / Inert atmosphere 1.3: 2 h / -78 - 20 °C / Inert atmosphere 2.1: boron trichloride / hexane; 4-(dicyanomethylene)-2-methyl-6-(4-dimethylaminostyryl)-4H-pyran / 18 h / Inert atmosphere 3.1: magnesium / diethyl ether; ethylene dibromide / Inert atmosphere; Reflux 3.2: 3 h / 0 - 20 °C / Inert atmosphere View Scheme

potassium-sodium in diethyl ether; Petroleum ether 24 h; Ambient temperature;

dichloromonosilane