1: triethylamine / ethanol / Heating 2: H2 / Pd/C / ethanol 3: ethanol / Ambient temperature 4: MnO2 / acetone / Ambient temperature 5: aq. HCl; acetone 6: para-toluenesulfonic acid / toluene / Heating View Scheme

sodium hydride 1.) 1 h, rt; 2.) 90 deg C, 4 h; Yield given. Multistep reaction. Yields of byproduct given;