1: 73 percent / 10percent aq. NaOH / dimethylformamide / 2 h / Ambient temperature 2: 1.) thionyl chloride, 2.) NaOAc / 1.) RT, 16 h, 2.) ethanol, reflux, 0.5 h View Scheme

1: 19 percent / Ca(OH)2, Na2CO3 / H2O / 16 h / 65 °C 2: 73 percent / 10percent aq. NaOH / dimethylformamide / 2 h / Ambient temperature 3: 1.) thionyl chloride, 2.) NaOAc / 1.) RT, 16 h, 2.) ethanol, reflux, 0.5 h View Scheme

thionyl chloride; sodium acetate 1.) RT, 16 h, 2.) ethanol, reflux, 0.5 h; Yield given. Multistep reaction;