hydrogen; palladium on activated charcoal in ethyl acetate P=760 Torr; 21 h; Ambient temperature;

triethylamine in water; N,N-dimethyl-formamide pH 9;

1: 51 percent / 2.5N aq. NaOH / 22.5 h / Ambient temperature 2: 100 percent / H2 / 10percent Pd/C / ethyl acetate / 21 h / 760 Torr / Ambient temperature View Scheme