1: NaOH / ethanol; H2O / 1 h / Heating 2: 1.) H2 / 1.) 10percent Pd/C / 1.) ethanol, 2.) overnight 3: 90 percent / LiAlH4 / tetrahydrofuran / Ambient temperature 4: 92 percent / thionyl chloride, pyridine / benzene / Heating View Scheme

1: NaOH / ethanol; H2O / 1 h / Heating 2: 1.) H2 / 1.) 10percent Pd/C / 1.) ethanol, 2.) overnight View Scheme