L-Selectridereg; in tetrahydrofuran T=25°C;

Multi-step reaction with 4 steps 1: 98 percent / L-selectride / tetrahydrofuran / 0.5 h / Ambient temperature2: 1.) NaH, 2.) CuCl / 1.) toluene, RT, 1 h, 2.) toluene, 15 min3: toluene; CH2Cl2 / 24 h4: p-TsOH / diethyl ether / 1 h  

Multi-step reaction with 4 steps 1: 92 percent / L-selectride / tetrahydrofuran / 0.33 h / Ambient temperature2: 1.) NaH, 2.) CuCl / 1.) toluene, RT, 1 h, 2.) toluene, 15 min3: toluene; CH2Cl2 / 24 h4: p-TsOH / diethyl ether / 1 h