1: 70.8 percent / 25percent aq. ammonia / tetrahydrofuran / 2 h / Ambient temperature 2: CF3COOH / 0.25 h / Ambient temperature 3: acetonitrile / 15 h / Ambient temperature 4: CF3COOH / 0.33 h / Ambient temperature 5: acetonitrile / 15 h / Ambient temperature 6: 85.4 percent / H2, AcOH / Pd black / methanol / 3 h / Ambient temperature View Scheme

1: 70.8 percent / 25percent aq. ammonia / tetrahydrofuran / 2 h / Ambient temperature 2: CF3COOH / 0.25 h / Ambient temperature 3: acetonitrile / 15 h / Ambient temperature View Scheme

1: 70.8 percent / 25percent aq. ammonia / tetrahydrofuran / 2 h / Ambient temperature 2: CF3COOH / 0.25 h / Ambient temperature 3: acetonitrile / 15 h / Ambient temperature 4: CF3COOH / 0.33 h / Ambient temperature 5: acetonitrile / 15 h / Ambient temperature 6: 1.) H2, AcOH, 2.) H+ / 1.) Pd black / 1.) RT, 5 d View Scheme