1: 97 percent / pyridine 2: 98 percent / LAH / tetrahydrofuran / Heating 3: 97 percent / H2O / 1 h / 90 °C 4: 1.) HCl, 2.) pyridine / 1.) MeOH, H2O, reflux 5: dehydrogenation 6: 1.) hydrolysis, 2.) irradiation View Scheme