1: 65 percent / hydroxylamine hydrochloride / ethanol / 1)r.t., 2 h, 2) reflux, 1 h 2: 70 percent / PCl3 / tetrahydrofuran / 0.67 h / Ambient temperature 3: 1) NaOCH3 / 1) methanol, reflux, 30 min, 2) methanol, reflux, 22 h View Scheme

ammonium hydroxide in ethanol 40 h; Ambient temperature;