1: 54 percent / H2 / palladium on charcoal (10percent) 2: 99 percent / thionyl chloride, N,N-dimethylformamide / 2.5 h / Heating 3: 67 percent / 2.5 h / Ambient temperature View Scheme

1: 54 percent / H2 / palladium on charcoal (10percent) 2: 99 percent / thionyl chloride, N,N-dimethylformamide / 2.5 h / Heating 3: 57 percent / tetrahydrofuran; H2O / 0.5 h View Scheme

1: 54 percent / H2 / palladium on charcoal (10percent) 2: 99 percent / thionyl chloride, N,N-dimethylformamide / 2.5 h / Heating 3: 42 percent / tetrahydrofuran; H2O / 0.5 h View Scheme