ammonium hydroxide; hydrogen; palladium on activated charcoal in methanol 3 h; Ambient temperature;

1: 1.) KOH / 1.) tris-<2-(2-methoxyethoxy)ethyl>amine / 1.) MeCN, room temp., 5 min, 2.) room temp., 15 min 2: 84 percent / NH3 / methanol / 24 h / Ambient temperature 3: 78 percent / pyridine, N,N-diisopropylethylamine / 3 h / Ambient temperature 4: 76 percent / 4-dimethylaminopyridine / acetonitrile / 16 h / Ambient temperature 5: 75 percent / n-Bu3SnH, 2,2'-azobis(2-methyl)propionitrile / toluene / 2 h / 75 °C 6: 67 percent / 80percent aq. AcOH / 0.5 h / Ambient temperature View Scheme

tetrabutyl ammonium fluoride in tetrahydrofuran 0.5 h; Ambient temperature;

1: 1.) KOH / 1.) tris-<2-(2-methoxyethoxy)ethyl>amine / 1.) MeCN, room temp., 5 min, 2.) room temp., 15 min 2: 84 percent / NH3 / methanol / 24 h / Ambient temperature 3: 78 percent / pyridine, N,N-diisopropylethylamine / 3 h / Ambient temperature 4: 76 percent / 4-dimethylaminopyridine / acetonitrile / 16 h / Ambient temperature 5: 75 percent / n-Bu3SnH, 2,2'-azobis(2-methyl)propionitrile / toluene / 2 h / 75 °C 6: 67 percent / 80percent aq. AcOH / 0.5 h / Ambient temperature View Scheme

tetrabutyl ammonium fluoride in tetrahydrofuran 0.5 h; Ambient temperature;

acetic acid 0.5 h; Ambient temperature;

1: 84 percent / NH3 / methanol / 24 h / Ambient temperature 2: 78 percent / pyridine, N,N-diisopropylethylamine / 3 h / Ambient temperature 3: 76 percent / 4-dimethylaminopyridine / acetonitrile / 16 h / Ambient temperature 4: 75 percent / n-Bu3SnH, 2,2'-azobis(2-methyl)propionitrile / toluene / 2 h / 75 °C 5: 67 percent / 80percent aq. AcOH / 0.5 h / Ambient temperature View Scheme

1: 46 percent / imidazole 2: 92 percent / DIBAL / 0.08 h / -78 °C 3: CCl4, tris(dimethylamino)phosphane / tetrahydrofuran / 4 h / -80 °C 4: 29 percent / KOH, tris<2-(2-methoxyethoxy)ethyl>amine / acetonitrile / 0.5 h / Ambient temperature 5: 54 percent / Bu4NF / tetrahydrofuran / 0.5 h / Ambient temperature View Scheme

1: 92 percent / DIBAL / 0.08 h / -78 °C 2: CCl4, tris(dimethylamino)phosphane / tetrahydrofuran / 4 h / -80 °C 3: 29 percent / KOH, tris<2-(2-methoxyethoxy)ethyl>amine / acetonitrile / 0.5 h / Ambient temperature 4: 54 percent / Bu4NF / tetrahydrofuran / 0.5 h / Ambient temperature View Scheme

1: 46 percent / KOH, tris<2-(2-methoxyethoxy)ethyl>amine / acetonitrile; tetrahydrofuran / 0.17 h / Ambient temperature 2: 67 percent / Bu4NF / tetrahydrofuran / 0.5 h / Ambient temperature View Scheme