water; potassium; magnesium chloride 1.) MgCl2, potassium, THF reflux, 24 h; 2.) from -70 deg C to room temperature; Yield given. Multistep reaction;

water; potassium; magnesium chloride 1.) MgCl2, potassium, THF reflux, 24 h; 2.) from -70 deg C to room temperature; Yield given. Multistep reaction;