hydrogen; palladium on activated charcoal in methanol T=20°C; P=760 Torr; 2 h;

1: With palladium on activated charcoal in methanol T=20°C; 6 h; 2: With trifluoroacetic acid in dichloromethane 5 h;

hydrogen; palladium on activated charcoal in ethanol T=20°C; 5 h;

triphenylphosphine in tetrahydrofuran; water T=20°C; Reduction; Staudinger reaction; 12 h;

1: With acetic anhydride; sodium carbonate in water; acetone T=0 - 20°C; 3 h; 2: With thionyl chloride in chloroform T=0 - 20°C; 3 h; 3: With hydrogenchloride in water 1 h; RefluxEnzymatic reaction;

1: 98 percent / H2 / Pd/C / methanol / 2 h / 20 °C / 760 Torr View Scheme

1: 96 percent / sodium azide; ammonium chloride / dimethylformamide; H2O / 3 h / Heating 2: pyridine / 1 h / 0 °C 3: 18-crown-6 / toluene / 2 h / Heating 4: NaOMe / methanol / 2 h / 20 °C 5: lipase AK fron Pseudomonas sp. / 10 h / 40 °C 6: 79 percent / triphenylphosphine / tetrahydrofuran; H2O / 12 h / 20 °C View Scheme

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