1: With N-ethyl-N,N-diisopropylamine in 1,4-dioxane T=150°C; 0.0833333 h; Microwave irradiation; 2: With sodium hydroxide in diethyl ether; water T=20°C; 1 h;

1.1: lithium hexamethyldisilazane / tetrahydrofuran; toluene / 1 h / -78 - -60 °C / Inert atmosphere 1.2: 16 h / -78 - 20 °C / Inert atmosphere 2.1: hydrazine hydrate / ethanol / 24 h / Reflux; Inert atmosphere 3.1: N-ethyl-N,N-diisopropylamine / 1,4-dioxane / 0.08 h / 150 °C / Microwave irradiation 3.2: 1 h / 20 °C View Scheme

1.1: hydrazine hydrate / ethanol / 24 h / Reflux; Inert atmosphere 2.1: N-ethyl-N,N-diisopropylamine / 1,4-dioxane / 0.08 h / 150 °C / Microwave irradiation 2.2: 1 h / 20 °C View Scheme