hydrogen; palladium on activated charcoal in methanol 2 h; Ambient temperature;

1: N-methylmorpholine / tetrahydrofuran / 0.33 h / -20 °C 2: tetrahydrofuran / 1 h / -20 °C 3: H2 / 10percent Pd/C / ethyl acetate / 16 h / 760 Torr View Scheme