Example 11
A solution of acetyl substrate was dissolved in ethyl ether (Avantor Performance Materials, Inc.; Lot No.: 0000128533) and 0.1 M pH 7.0 potassium phosphate buffer at room temperature. Lipase acrylic resin (Sigma-Aldrich, Inc.; Lot No. SLBW1544) was added into the solution. The reaction mixture was put at room temperature for 16 hours. The reaction mixture was filtered and concentrated by the rotatory evaporator to get crude. The residue was purified by column chromatography through a pad of silica gel (FUJI Silysia Chemical Ltd.; Cat No. HT80186). Eluent system with the column volume (EtOAc/Hexane=1/4 to 3/1). The collected fractions were concentrated by the rotatory evaporator and high-vacuum to afford the product. Table 14 indicated the production yield by using lipase reagent of acetyl substrates.