sodium in methanol T=20°C; 72 h; anodic oxidation under controlled potential;

1: 1) sodium butoxide, 2) aq. H2SO4 / 1) 1-butanol, 80 deg C, 2) CH3CO2H, reflux, 6 h 2: 1) BF3-acetic acid, 2) CH3CO2Na / 1) 50 deg C, 20 h, 2) H2O, reflux, 2 h View Scheme

sodium acetate; BF3*AcOH 1) 50 deg C, 20 h, 2) H2O, reflux, 2 h; Yield given. Multistep reaction;