sodium hydride in dimethyl sulfoxide 1 h; Ambient temperature;

1: 91 percent / dimethylsulfoxide; 1,2-dimethoxy-ethane 2: 89 percent / NaH View Scheme

1: 91 percent / dimethylsulfoxide; 1,2-dimethoxy-ethane 2: 89 percent / NaH View Scheme

1: 91 percent / 1.) sodium hydride / dimethylsulfoxide; 1,2-dimethoxy-ethane / 65 °C / 1.) 1 h; 2.) 1.5 h 2: 89 percent / sodium hydride / dimethylsulfoxide / 1 h / Ambient temperature View Scheme

BF3*AcOH in dichloromethane T=0°C; 0.333333 h;