1: 61 percent / 10percent H2SO4 / methanol / 24 h / Ambient temperature 2: 1) mesitol, molecular sieve, 2) K, aniline / 1) pyridine, anh. methylcyclohexane, 10 h, irradiation, 2) liq. NH3 3: 64 percent / diisobutylaluminiumhydride / toluene View Scheme

1: 61 percent / 10percent H2SO4 / methanol / 24 h / Ambient temperature 3: 77 percent / conc. HCl / pyridine / 1 h / 210 °C View Scheme

1: 61 percent / 10percent H2SO4 / methanol / 24 h / Ambient temperature 2: 1) mesitol, molecular sieve, 2) K, aniline / 1) pyridine, anh. methylcyclohexane, 10 h, irradiation, 2) liq. NH3 View Scheme

1: 61 percent / 10percent H2SO4 / methanol / 24 h / Ambient temperature View Scheme

1: 61 percent / 10percent H2SO4 / methanol / 24 h / Ambient temperature 3: 49.4 mg / Cr(VI)-oxid, 95percent acetic acid / acetic acid / 2 h / Ambient temperature View Scheme