1: SOCl2 / 1 h / Heating 2: aq. NaN3 / acetone / 1 h / below 25 deg C 3: aq. AcOH / 0.17 h / Heating 4: aq. KOH / Heating 5: 1.) cupric acetate, 2.) aq. Na2S, concd. HCl / 1.) H2O, MeOH, reflux, 2.) EtOH View Scheme

1: aq. NaN3 / acetone / 1 h / below 25 deg C 2: aq. AcOH / 0.17 h / Heating 3: aq. KOH / Heating 4: 1.) cupric acetate, 2.) aq. Na2S, concd. HCl / 1.) H2O, MeOH, reflux, 2.) EtOH View Scheme

1: aq. KOH / Heating 2: 1.) cupric acetate, 2.) aq. Na2S, concd. HCl / 1.) H2O, MeOH, reflux, 2.) EtOH View Scheme

1: aq. AcOH / 0.17 h / Heating 2: aq. KOH / Heating 3: 1.) cupric acetate, 2.) aq. Na2S, concd. HCl / 1.) H2O, MeOH, reflux, 2.) EtOH View Scheme

hydrogenchloride; sodium sulfide; copper diacetate 1.) H2O, MeOH, reflux, 2.) EtOH; Multistep reaction;