aluminium amalgam in ethanol T=30°C; 8 h;

1: 1,8-diazabicyclo<5.4.0>undec-7-ene (DBU), Pd(dibenzylideneacetone)2 <Pd(dba)2>, 1,2-bisdiphenylphosphinoethane (dppe) / acetonitrile / 10 h / 25 °C 2: H2 / 10percent Pd/C / methanol / 3102.9 Torr View Scheme