Phosphocarnitine was conveniently obtained from easily available diethyl 3-chloro-2-oxopropanephosphonates, followed by subsequent reduction, Mucor miehei lipase (IM) mediated resolution, amination and dealkylation. Candida antarctica lipase B (CALB) served as an effective biocatalyst in the resolution of several 1- or 2- hydroxyalkanephosphonates. The chlorine atom in different positions on the molecules greatly affected their enantioselectivity. CALB also showed satisfactory enantioselectivity toward those molecules bearing an azido moiety. Both enantiomers of phosphogabob and fosfomycin were also prepared via CALB-mediated resolution as the key step.
从易于获得的 3-
氯-2-氧代
丙烷膦酸二乙酯中方便地获得了
磷卡尼汀,随后进行了还原、Mucor miehei
脂肪酶(IM)介导的解析、胺化和脱烷基化。白色念珠菌
脂肪酶 B(CALB)是一种有效的
生物催化剂,可用于多种 1-或 2-羟基烷基
膦酸盐的分解。分子上不同位置的
氯原子极大地影响了它们的对映选择性。CALB 对含有
叠氮基的分子也表现出令人满意的对映选择性。
磷霉素和
磷霉素的两种对映体也都是通过 CALB 介导的解析作为关键步骤制备的。