1: dimethyl sulfoxide / 6 h / 180 °C 2: diborane / tetrahydrofuran / a) 0 deg C, 15 min, b) 20 deg C, 45 min View Scheme

1: diphenyl phosphoryl azide; 1,8-diazabicyclo[5.4.0]undec-7-ene / tetrahydrofuran / 14 h / 0 - 25 °C / |Inert atmosphere 2: palladium on activated charcoal; hydrogen / methanol; chloroform / 20 h / 25 °C View Scheme