1: trifluoroacetic acid / 1 h / Ambient temperature 2: KOH / acetone / 8 h / Heating 3: 75 percent / 1.) H2 (50 psi), 2.) conc. HCl / 5percent Pd on carbon / methanol / 1.5 h 4: 4 N HCl / 4 h / Heating View Scheme

1: KOH / acetone / 8 h / Heating 2: 75 percent / 1.) H2 (50 psi), 2.) conc. HCl / 5percent Pd on carbon / methanol / 1.5 h 3: 4 N HCl / 4 h / Heating View Scheme

1: 75 percent / 1.) H2 (50 psi), 2.) conc. HCl / 5percent Pd on carbon / methanol / 1.5 h 2: 4 N HCl / 4 h / Heating View Scheme

hydrogenchloride 4 h; Heating;