1: triethylamine / water; acetonitrile / 20 °C 2: N-ethyl-N,N-diisopropylamine / acetonitrile / 12 h / 20 °C 3: 10 palladium on activated charcoal; hydrogen / methanol / 4 h 4: N-ethyl-N,N-diisopropylamine / water; acetonitrile / 12 h / 20 °C 5: 10 palladium on activated charcoal; hydrogen / methanol / 4 h 6: piperidine / N,N-dimethyl-formamide / 1 h / 50 °C / Microwave irradiation View Scheme

sodium tetrahydroborate in methanol T=20°C;

triethylamine in water; acetonitrile

triethylamine in water; acetonitrile T=20°C;

triethylamine in water; acetonitrile T=20°C;

triethylamine in water; acetonitrile T=50°C; 0.166667 h; Microwave irradiation;

triethylamine in water; acetonitrile T=20°C;