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 View Scheme

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