1: thionyl chloride / CHCl3 / 2.5 h / 65 °C 2: 2.5 M NaOH / 72 h / 20 °C 3: 1.) lithium powder, 5 molpercent 4,4'-di-tert-butylbiphenyl; 2.) H2O / 1.) THF, -15 deg C, 3 h; 2.) THF, -15 deg C to 20 deg C, 3 h View Scheme