文摘
In this report, α-isosalicin, a potent anticoagulant and skin whitening agent, was synthesized by a highly efficient chemoselective and diastereoselective reaction, catalyzed by maltase from bakers’ yeast (Saccharomyces cerevisiae). The highest yield of this one-step transglucosylation reaction was achieved with 50a0;mM of salicyl alcohol as a glucose acceptor. The key reaction factors were optimized using response surface methodology (RSM) with an enzyme concentration of 10a0;U/mL. The optimum temperature of the reaction was determined as 36.5a0;°C, the optimal maltose concentration was 40 % (w/v), the optimal pH was 6.5, and the optimal reaction time was 16a0;h. Under these conditions 75 % of α-isosalicin was obtained, with a yield of 10a0;g/L, and no by product formation was observed.