lithium; ethylamine T=19°C; 0.5 h;

1.1: lead(IV) tetraacetate / dichloromethane / 1 h / -5 - 0 °C / Inert atmosphere 1.2: Inert atmosphere 2.1: pyridine; oxygen; ozone / dichloromethane / 3 h / -78 °C 2.2: 0.5 h / -78 °C 3.1: lithium aluminium tetrahydride / tetrahydrofuran / 2.5 h / 0 - 45 °C / Inert atmosphere 4.1: 4-(N,N-dimethlyamino)pyridine / dichloromethane / 3.5 h / 0 °C / Inert atmosphere 5.1: magnesium / tetrahydrofuran / 0.17 h / 50 °C / Inert atmosphere 5.2: 1 h / 0 - 20 °C / Inert atmosphere 6.1: tetrabutyl ammonium fluoride / tetrahydrofuran / 10 h / 0 - 20 °C / Inert atmosphere 7.1: 1,4-dioxane / Irradiation 7.2: 100 °C View Scheme

pyridine; 1H-imidazole T=25°C; Etherification; 2 h;