1,2,2-trichloro-1,1,2-trichloro-ethane in tetrahydrofuran T=-40 - 23°C; 24 h;

1: With potassium tert-butylate in tetrahydrofuran T=23°C; 4 h; Inert atmosphere; 2: With 1,2,2-trichloro-1,1,2-trichloro-ethane in tetrahydrofuran T=-40 - 23°C; Inert atmosphere;

1.1: acetic acid / methanol; water / 10.25 h / 23 - 50 °C / Inert atmosphere 2.1: chloro-trimethyl-silane / ethyl acetate / 2.75 h / 70 °C / Inert atmosphere 3.1: potassium tert-butylate / tetrahydrofuran / 4 h / 23 °C / Inert atmosphere 3.2: -40 - 23 °C / Inert atmosphere View Scheme

1.1: chloro-trimethyl-silane / ethyl acetate / 2.75 h / 70 °C / Inert atmosphere 2.1: potassium tert-butylate / tetrahydrofuran / 4 h / 23 °C / Inert atmosphere 2.2: -40 - 23 °C / Inert atmosphere View Scheme

cesium fluoride in acetonitrile T=23 - 60°C; Inert atmosphere;