1.1: cellulose tris(3,5-dimethylphenylcarbamate) on silica / ethanol / |Resolution of racemate; |Large scale 2.1: acetic acid; hydrogen bromide / water / 6.92 h / 60 - 125 °C 3.1: sodium carbonate / water; o-xylene / 70 - 80 °C 3.2: |Reflux View Scheme