For the purpose of carrying out smoothly enzymatic reaction of water-insoluble substrates in organic solvents, a new type of immobilized enzyme, a lipid-lipase aggregate, was developed. In order to prepare various kinds of lipid-lipase aggregates, 27 kinds of dialkyl ether-type phospholipid analogues were newly synthesized and used for the preparation of aggregates with lipase. Thus obtained lipid-lipase aggregates were found to catalyze the enantioselective hydrolysis of the (±)-α-acyloxy ester 2 much more efficiently than lipase immobilized with synthetic prepolymer (ENTP-4000) in water-saturated isopropyl ether. Namely. the reaction time became much shorter (2 to 3d for completion as compared with 21 d) and the chemical and optical yields of the reaction products were found to be high.
为了顺利进行
水不溶性底物在有机溶剂中的酶促反应,开发了一种新型的固定化酶——脂质-
脂肪酶聚集体。为了制备各种脂质-
脂肪酶聚集体,新合成了27种二烷基醚型
磷脂类似物,并用于制备与
脂肪酶的聚集体。所得的脂质-
脂肪酶聚集体被发现能够比在
水分饱和的
异丙醚中通过合成预聚物(ENTP-4000)固定的
脂肪酶更有效地催化(±)-α-酰氧基酯2的对映选择性
水解。即,反应时间大大缩短(完成需要2至3天,而之前需要21天),并且反应产物的
化学和光学产率都很高。