1: 96 percent / NBS / CHCl3; ethanol / 8 h / Ambient temperature 2: 98 percent / 2 M HCl / methanol / 0.5 h / Ambient temperature 3: 80 percent / tributyltin hydride, AIBN / toluene; methanol / 1 h / Heating 4: 1.) hydrazine hydrate, 2.) conc. HCl / 1.) 95 percent ethanol, reflux, 2 h, 2.) room temperature View Scheme

1: 57 percent / diethyl azodicarboxylate, PPh3 / tetrahydrofuran / 0.25 h / Ambient temperature; reactions of cyclohex-2-enol with diacylamines under Mitsunobu reaction conditions, stereocontrolled preparation of cyclohexane amino alcohols 2: 96 percent / NBS / CHCl3; ethanol / 8 h / Ambient temperature 3: 98 percent / 2 M HCl / methanol / 0.5 h / Ambient temperature 4: 80 percent / tributyltin hydride, AIBN / toluene; methanol / 1 h / Heating 5: 1.) hydrazine hydrate, 2.) conc. HCl / 1.) 95 percent ethanol, reflux, 2 h, 2.) room temperature View Scheme

hydrogenchloride; hydrazine hydrate 1.) 95 percent ethanol, reflux, 2 h, 2.) room temperature; Multistep reaction;