hydrogen; palladium on activated charcoal in ethanol P=760 Torr; 2 h;

1: 1.) Buli, 2.) TsN3 / 1.) THF, -75 deg C, 10 min, 2.) THF, -75 deg C, 2 h 2: 100 percent / H2 / 10percent Pd/C / ethanol / 2 h / 760 Torr View Scheme