sodium amalgam; water 1.) methanol, room temperature, 9 h, 2.) reflux, 3 h; Yield given. Multistep reaction;

1: 92 percent / potassium carbonate / acetone / 24 h / Heating 2: 1.) sodium amalgam, 2.) H2O / 1.) methanol, room temperature, 9 h, 2.) reflux, 3 h View Scheme