1: NH2OH*HCl, AcONa / methanol 2: CHCl3 / isomerization 3: 82 percent / NaH / dimethylformamide 4: 76 percent / KOH / dimethylsulfoxide; tetrahydrofuran 5: H2 / catalytic hydrogenation 6: HCOOH / ethanol / Heating 7: 68 percent / Na2S2 / aq. ethanol / Heating View Scheme

sodium acetate; palladium; acetic acid Hydrogenation.Reagens 4: wss. Aethanol;

1: NH2OH*HCl, AcONa / methanol 2: CHCl3 / isomerization 3: 82 percent / NaH / dimethylformamide 4: 76 percent / KOH / dimethylsulfoxide; tetrahydrofuran 5: H2 / catalytic hydrogenation 6: HCOOH / ethanol / Heating View Scheme