hydrogen; palladium on activated charcoal in ethanol P=2327.2 Torr; 3 h;

1: 70 percent / 20percent (w/v) K2CO3 / tetrahydrofuran / 12 h / Heating 2: 80 percent / H2 / 5percent Pd/C / ethanol / 3 h / 2327.2 Torr View Scheme

1: [O-(benzotriazol-1-yl)-N,N,N',N'-tetramethyluronium]*BF4; N,N-diisopropylethylamine / CH2Cl2; H2O / 20 °C 2: trifluoroacetic acid; triisopropylsilane / 3 h / 20 °C View Scheme