IRN-77 Amberlite in acetone 24 h; Ambient temperature;

Multi-step reaction with 3 steps 1: 1.) butyllithium / 1.) THF, hexane, 1.5 h, 20 deg C: 2.) THF, 66 deg C, 12 h2: 262 mg / tetrabutylammonium fluoride / tetrahydrofuran / 20 °C3: 1.) N-methyl piperidone; 2.) aluminium isopropoxide / 1.) toluene, boiling; 2.) toluene, 110 deg C, 5 h  

Multi-step reaction with 2 steps 1: 262 mg / tetrabutylammonium fluoride / tetrahydrofuran / 20 °C2: 1.) N-methyl piperidone; 2.) aluminium isopropoxide / 1.) toluene, boiling; 2.) toluene, 110 deg C, 5 h