Preparative-scale Enzyme-catalyzed Synthesis of (<i>R</i>)-α-Fluorophenylacetic Acid
作者:Yasuaki FUKUYAMA、Kaori MATOISHI、Masakazu IWASAKI、Eiji TAKIZAWA、Mamoru MIYAZAKI、Hiromichi OHTA、Satoshi HANZAWA、Hitoshi KAKIDANI、Takeshi SUGAI
DOI:10.1271/bbb.63.1664
日期:1999.1
A preparative-scale asymmetric synthesis of (R)-α-fluorophenylacetic acid, a useful chiral derivatizing reagent, is described. Starting from ethyl α-bromophenylacetate, α-fluorophenylmalonic acid dipotassium salt was prepared in three steps (54% yield), including nucleophilic substitution by the fluoride ion as the keystep. Both the purified form and crude preparation of arylmalonate decarboxylase in E. coli worked well on this substrate, and (R)-α-flurophenylacetic acid (>99% e.e.) was prepared in a quantitative yield.
描述了一种制备规模的非对称合成(R)-α-氟苯乙酸,这是一种有用的手性衍生试剂。从乙基α-溴苯乙酸酯出发,经过三步合成α-氟苯马隆酸二钾盐(收率54%),其中氟离子作为关键步骤进行亲核取代。经过纯化后的和粗制的芳基马隆酸脱羧酶在大肠杆菌中对该底物均表现良好,并以定量收率制备得到了(R)-α-氟苯乙酸(对映体过量>99%)。