1: 1.) NaBH4; 2.) toluene-p-sulphonic acid / 2.) benzene 2: 92 percent / Pd-C 10percent / xylene / Heating 3: hydrolysis 5: 1.) NH3, Na; 2.) H2 / 2.) Pd-C 10percent / 1.) THF 6: 80 percent 8: trifluoroacetic acid / CH2Cl2 / -20 °C View Scheme

1: 1.) NaBH4; 2.) toluene-p-sulphonic acid / 2.) benzene 2: 92 percent / Pd-C 10percent / xylene / Heating View Scheme

1: 1.) NaBH4; 2.) toluene-p-sulphonic acid / 2.) benzene 2: 92 percent / Pd-C 10percent / xylene / Heating 3: hydrolysis View Scheme

1: 1.) NaBH4; 2.) toluene-p-sulphonic acid / 2.) benzene 2: 92 percent / Pd-C 10percent / xylene / Heating 3: hydrolysis View Scheme