Racemic 1-acyloxy(aryl)methyl- and 1-acyloxy(heteroaryl)methylphosphonates (±)-4 are prepared and tested for kinetic resolution by lipases AP 6 and FAP 15. Both enzymes proved to be useful in terms of broadness of application, reaction rate and enantiomeric excess. In general, reaction rates are higher with lipase AP 6 than with FAP 15. (S)-α-Hydroxyphosphonates (-)-3 are formed on enzymatic hydrolysis of α-acyloxyphosphonates (±)-4. Lipase FAP 15 gives products with higher enantiomeric excesses. 1-Acetoxy-(2-methoxyphenyl)methylphosphonates are either not kinetically resolved or are saponified with very low enantioselectivity.
制备了外消旋 1-乙酰氧基(芳基)
甲基膦酸盐和 1-乙酰氧基(杂芳基)
甲基膦酸盐 (±)-4,并通过
脂肪酶 AP 6 和 FAP 15 进行了动力学解析测试。事实证明,这两种酶在应用范围、反应速率和对映体过量方面都很有用。(S)-δ-羟基
膦酸盐(-)-3 是在δ-乙酰氧基
膦酸盐(±)-4 的酶
水解作用下生成的。
脂肪酶 FAP 15 可生成对映体过量率更高的产品。1-乙酰氧基-(2-
甲氧基苯基)
甲基膦酸盐要么无法进行动力学解析,要么以极低的对映选择性进行皂化。