中文名称 | 英文名称 | CAS号 | 化学式 | 分子量 |
---|---|---|---|---|
(4S)-4-氟-D-谷氨酸 | (-)-D-erythro-4-fluoroglutamic acid | 132746-47-5 | C5H8FNO4 | 165.121 |
—— | D-threo-4-fluoroglutamic acid | —— | C5H8FNO4 | 165.121 |
L-erythro-4-氟谷氨酸 | (2S,4R)-L-erythro-4-fluoroglutamic acid | 32563-24-9 | C5H8FNO4 | 165.121 |
—— | (2S,4S)-L-threo-4-fluoroglutamic acid | 32563-25-0 | C5H8FNO4 | 165.121 |
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.