1: Et3N / toluene / 3 h / Heating 2: NaH / dimethylformamide 3: B(OH)3, (EtO)3B / Heating 4: 1.) Et3N, 2.) Et3N, water / 1.) diethyl ether, RT, 5 h, 2.) diethyl ether, reflux, 2 h 5: CHCl3; propan-2-ol; dimethylformamide / 12 h / 50 °C 6: H2 / 10percent Pd/C / ethanol / 12 h / 40 °C / 1034.3 Torr View Scheme

Multi-step reaction with 4 steps 1: Et3N / toluene / 3 h / Heating2: NaH / dimethylformamide3: B(OH)3, (EtO)3B / Heating4: 1.) Et3N, 2.) Et3N, water / 1.) diethyl ether, RT, 5 h, 2.) diethyl ether, reflux, 2 h  

Multi-step reaction with 3 steps 1: Et3N / toluene / 3 h / Heating2: NaH / dimethylformamide3: B(OH)3, (EtO)3B / Heating