1: 74 percent / 1M Dibal / hexane; CH2Cl2 / 1 h / Ambient temperature 2: 41 percent / triphenylphosphine, diethyl azodiacrboxylate / tetrahydrofuran 3: 1.) hydrazine hydrate, 2.) 18percent aq.HCl / 1.) methanol, reflux, 3 h, 2.) methanol, reflux, 30 min View Scheme

1: diisobutylaluminium hydride (DIBAL) / hexane 2: PBr3 4: NH2NH2 View Scheme