sulfuric acid in ethylene glycol 5 h; Heating; Yield given;

1: 85 percent / K2CO3, Aliquat 336 / toluene 2: 1.) EtMgBr / 1.) Et2O, reflux, 2 h, 2.) 20-25 deg C, 16 h 3: conc. aq. H2SO4 / ethane-1,2-diol / 5 h / Heating View Scheme

1: 1.) EtMgBr / 1.) Et2O, reflux, 2 h, 2.) 20-25 deg C, 16 h 2: conc. aq. H2SO4 / ethane-1,2-diol / 5 h / Heating View Scheme