1: 52 percent / sodium acetate / 8 h / 140 - 145 °C 2: 1.) KOH / 1.) EtOH, 30 min; 2.) acetone, 4 h, reflux View Scheme

1: 1.) hexamethylenetetramine; 3.) cc. HCl / 1.) CH3Cl, 2 h, reflux; 2.) AcOH, 2 h, reflux; 3.) 30 min, reflux, H2O, RT, overnight 2: 52 percent / sodium acetate / 8 h / 140 - 145 °C 3: 1.) KOH / 1.) EtOH, 30 min; 2.) acetone, 4 h, reflux View Scheme

potassium hydroxide 1.) EtOH, 30 min; 2.) acetone, 4 h, reflux; Yield given. Multistep reaction;