The synthesis of γ-fluoroglutamic acid, HOOCCHFCH2CH(NH2)COOH, was achieved by two independent methods, both of which involved the Michael reaction: (1) methyl α-fluoroacrylate and diethyl acetamidomalonate gave the transesterified intermediate, which on hydrolysis produced γ-fluoroglutamic acid (31% yield); (2) ethyl α-acetamidoacrylate and diethyl fluoromalonate reacted under mild conditions to give, after hydrolysis, the required amino acid in 56% overall yield. Of the two procedures, the second is preferable, since it is based on more readily available starting materials and gives a higher yield.
γ-氟谷氨酸的合成通过两种独立的方法实现,两种方法都涉及迈克尔反应:(1) 甲基α-氟丙烯酸酯和乙酸二乙酰乙酸酯反应形成酯交换中间体,水解后产生γ-氟谷氨酸(31%收率);(2) 乙基α-乙酰胺基丙烯酸酯和二乙基氟代丙二酸酯在温和条件下反应,在水解后以56%总产率得到所需的氨基酸。在这两种方法中,第二种更可取,因为它基于更容易获得的起始物质并且产率更高。