1: With 4-methyl-morpholine; 1-propanephosphonic acid cyclic anhydride in ethyl acetate; acetonitrile T=0°C; 0.25 h; 2: With hydroxylamine hydrochloride in ethyl acetate; acetonitrile Ultrasonication;

hydroxylamine hydrochloride; triethylamine in tetrahydrofuran T=20°C; 16 h;

ethanol; hydroxylamine

potassium hydroxide

4-methyl-morpholine; 1-propanephosphonic acid cyclic anhydride in tetrahydrofuran T=0°C; Lossen rearrangement; 0.5 h;