1: aq. KOH / ethanol / 3 h / Heating 2: polyphosphoric acid / toluene / 4 h / Heating 3: 62 percent / tetrabutylammonium hydrogen sulfate, aq. NaOH / CH2Cl2 / 0.5 h 4: 1.) BuLi / 1.) THF, -70 deg C, 1 h, 2.) THF, RT, 18 h 5: conc. HCl / ethanol / 1 h / Heating View Scheme

1: aq. KOH / ethanol / 3 h / Heating 2: polyphosphoric acid / toluene / 4 h / Heating 3: 57 percent / sodium, liq. NH3, ferric nitrate / tetrahydrofuran / 1 h / -30 °C 4: 82 percent / pyridine hydrochloride / 0.5 h / 210 °C 5: 62 percent / K2CO3 / acetone; dimethylformamide / 18 h / Heating 6: 1.) BuLi / 1.) THF, -70 deg C, 1 h, 2.) THF, RT, 18 h 7: conc. HCl / ethanol / 1 h / Heating View Scheme

1: LiAlH4 / diethyl ether; tetrahydrofuran / 4 h / Heating 2: thionyl chloride / toluene / 1 h / 80 °C 3: ethanol; H2O / 12 h / Heating View Scheme

1: thionyl chloride / toluene / 1 h / 80 °C 2: ethanol; H2O / 12 h / Heating View Scheme

1: K2CO3 / dimethylformamide 2: Na<AlH2(OCH2CH2OMe)2> / benzene 3: (i) SOCl2, benzene, (ii) /BRN= 4652394/, aq. EtOH View Scheme

1: K2CO3 / dimethylformamide 2: Na<AlH2(OCH2CH2OMe)2> / benzene 3: (i) SOCl2, benzene, (ii) /BRN= 4652394/, aq. EtOH View Scheme

in ethanol; water 12 h; Heating;

(i) SOCl2, benzene, (ii) /BRN= 4652394/, aq. EtOH; Multistep reaction;

potassium hydroxide in ethanol