1: With tetrabutylammomium bromide; [Me2N]3P=NP(=NEt)[NMe2]2 in dichloromethane T=-78°C; Michael addition; 0.0833333 h; 2: With lithium hydroxide in tetrahydrofuran; water T=20°C; 0.166667 h; 3: With hydrogenchloride in ethanol; water 24 h; Heating; Title compound not separated from byproducts;