Factors screening to statistical experimental design of racemic atenolol kinetic resolution via transesterification reaction in organic solvent using free <i>Pseudomonas fluorescens</i>
lipase
作者:Joni Agustian、Azlina Harun Kamaruddin、Hassan Y. Aboul-Enein
DOI:10.1002/chir.22702
日期:2017.7
racemate via this method is limited. Screenings of enzyme, medium, and acetyl donor were conducted first to give Pseudomonas fluorescens lipase, tetrahydrofuran, and vinyl acetate. A statistical design of the experiment was then developed using Central Composite Design on some operational factors, which resulted in the conversions of 11.70–61.91% and substrate enantiomeric excess (ee) of 7.31–100%. The
由于外消旋阿替洛尔的(R)-对映异构体不具有β阻断活性且无副作用,因此从外消旋体转换为(S)-阿替洛尔更为有利。使用游离酶进行消旋阿替洛尔的酯交换反应是有限的,该酶被研究为通过该方法解决外消旋体的资源。首先进行酶,培养基和乙酰基供体的筛选,得到荧光假单胞菌脂肪酶,四氢呋喃和乙酸乙烯酯。然后使用Central Composite Design在某些操作因素上开发了实验的统计设计,其转化率为11.70–61.91%,底物对映体过量(ee)为7.31–100%。R 2可以接受二次模型95.13%(转化)和89.63%(ee)。预测值与观测值相当吻合。温度,搅拌速度和底物摩尔比因素对转化率和ee的影响很小,但是酶的负载对反应的影响很大。温度-搅拌速度和温度-底物摩尔比的相互作用对转化率有显着影响,而温度-搅拌速度,温度-底物摩尔比和搅拌速度-底物摩尔比对ee影响很大。发现在45°C,175 rpm,2000