Preparation method for a compound as shown in formula (I) and levo-praziquantel. A racemate of ester of the compound of formula (I) is used as a substrate, and reaction is performed under the catalysis of immobilized lipase to produce the compound of formula (I); a circulating fluidized bed reactor is used, the circulating fluidized bed reactor includes an external circulation system and a reaction column, the immobilized lipase is arranged in the reaction column, the substrate solution is circulated many times between the external circulation system and the reaction column, the reaction is performed in the reaction column. The preparation of levo-praziquantel includes the described preparation steps of the formula (I). The preparation method of formula (I) can significantly improve the utilization rate of enzyme and reduce the use ratio of enzyme/substrate, and has mild reaction conditions, strong stereoselectivity, high reaction efficiency.
以下是公式(I)所示化合物和左旋普
萘虫素的制备方法。使用公式(I)化合物的酯的外消旋体作为底物,在固定化
脂肪酶的催化下进行反应,产生公式(I)化合物;使用循环流化床反应器,循环流化床反应器包括外部循环系统和反应柱,固定化
脂肪酶排列在反应柱中,底物溶液在外部循环系统和反应柱之间循环多次,反应在反应柱中进行。左旋普
萘虫素的制备包括公式(I)的描述制备步骤。公式(I)的制备方法可以显著提高酶的利用率,减少酶/底物使用比率,并具有温和的反应条件,强的立体选择性和高的反应效率。