1: 5.26 g / SOCl2 / 6.5 h / Heating 2: 59 percent / LiAl(OBu-t)3H / tetrahydrofuran / 1.) 0-5 deg C, 30 min, 2.) RT, 1 h 3: tetrahydrofuran; dimethylsulfoxide / 1.) 0 deg C, 30 min, 2.) from 0 deg C to RT, 1 h 4: 0.5 h / 150 °C View Scheme

1: 23.8 g / NaOH / H2O / 20 h / Heating 2: 5.26 g / SOCl2 / 6.5 h / Heating 3: 59 percent / LiAl(OBu-t)3H / tetrahydrofuran / 1.) 0-5 deg C, 30 min, 2.) RT, 1 h 4: tetrahydrofuran; dimethylsulfoxide / 1.) 0 deg C, 30 min, 2.) from 0 deg C to RT, 1 h 5: 0.5 h / 150 °C View Scheme

1: tetrahydrofuran; dimethylsulfoxide / 1.) 0 deg C, 30 min, 2.) from 0 deg C to RT, 1 h 2: 0.5 h / 150 °C View Scheme

T=150°C; 0.5 h; Yield given;