1: 85 percent / HCl (gas) / Heating 2: 29 percent / K2CO3 / acetone / Heating 3: 81.7 percent / N-methylpyrrolidinone / 7 h / Heating 4: 90percent aq. HCOOH / 3 h / Heating 5: NaOH / H2O / 3 h / Heating 6: SOCl2 / 3 h / Heating View Scheme

1: 29 percent / K2CO3 / acetone / Heating 2: 81.7 percent / N-methylpyrrolidinone / 7 h / Heating 3: 90percent aq. HCOOH / 3 h / Heating 4: NaOH / H2O / 3 h / Heating 5: SOCl2 / 3 h / Heating View Scheme

1: 90percent aq. HCOOH / 3 h / Heating 2: NaOH / H2O / 3 h / Heating 3: SOCl2 / 3 h / Heating View Scheme

1: 81.7 percent / N-methylpyrrolidinone / 7 h / Heating 2: 90percent aq. HCOOH / 3 h / Heating 3: NaOH / H2O / 3 h / Heating 4: SOCl2 / 3 h / Heating View Scheme

thionyl chloride 3 h; Heating;

in toluene Heating; Title compound not separated from byproducts;