Glutamic acid derivatives, in particular monatin, may be conveniently prepared by alkylating a 4-protected hydroxyl pyroglutamic acid derivative with an alkylating agent to prepare a 4-protected hydroxyl-4-alkylglutamic acid derivative, followed by the steps of hydrolysis and deprotection. The 4-protected hydroxyl pyroglutamic acid derivative is easy to produce from hydroxyproline. The 4-protected hydroxyl pyroglutamic acid derivative is particularly suitable for use in the efficient manufacture of monatin of high optical purity, since it can be alkylated selectively at the 4-position and stereoselectively and after its alkylation, it can easily be converted to a glutamic acid derivative.
谷
氨酸衍
生物,尤其是莫纳汀,可以通过用烷基化剂烷基化4-保护羟基
吡咯酰基谷
氨酸衍
生物来方便地制备,以制备4-保护羟基-4-烷基谷
氨酸衍
生物,然后进行
水解和去保护步骤。4-保护羟基
吡咯酰基谷
氨酸衍
生物可以从羟基脯
氨酸轻松制备。4-保护羟基
吡咯酰基谷
氨酸衍
生物特别适用于高光学纯度莫纳汀的高效制造,因为它可以在4位选择性地烷基化和立体选择性地烷基化,烷基化后可以轻松转化为谷
氨酸衍
生物。