1: dimethylsulfoxide; dimethylformamide / 36 h / Ambient temperature 2: LiAlH4 / diethyl ether / 1.) 0 deg C, 30 min, 2.) RT, 2 h 3: POCl3, Et3N / CHCl3 / 0.5 h / Ambient temperature 4: pyridine / 1.) CHCl3, RT, 16 h, 2.) 30 min 5: 100 percent / H2 / 20percent Pd(OH)2/C / methanol; H2O / 24 h View Scheme