hydrogenchloride; tin(ll) chloride in methanol 3 h; Ambient temperature;

1: 14.1 g / N,N'-dicyclohexylcarbodiimide, 1-hydroxybenzotriazole / tetrahydrofuran / 3 h / Ambient temperature 2: 64 percent / SnCl2*2H2O, conc. HCl / methanol / 3 h / Ambient temperature View Scheme

1: 14.1 g / N,N'-dicyclohexylcarbodiimide, 1-hydroxybenzotriazole / tetrahydrofuran / 3 h / Ambient temperature 2: 64 percent / SnCl2*2H2O, conc. HCl / methanol / 3 h / Ambient temperature View Scheme