1.1: Mg / diethyl ether / 20 °C 1.2: diethyl ether; tetrahydrofuran / 2 h / 20 °C 2.1: Zn; aq. AcOH / 3 h / 20 °C / sonication View Scheme

chloro-trimethyl-silane in dichloromethane 17 h; Ambient temperature;