were synthesized by oxidation and subsequent hydrolysis of DL-trans- and DL-cis-5-furyl-2-oxo-oxazolidine-4-carboxylic acids (IV and VIII) derived from threo- and erythro-β-furyl-DL-serines (III and VII) respectively.
通过 DL-trans- 和 DL-cis-5-furyl-2-oxo-oxazolidine-4-
羧酸的氧化和后续
水解合成了苏-和赤-β-羟基-D
L-天冬氨酸(VI 和 X)( IV 和 VIII) 分别源自苏式-和赤式-β-
呋喃基-
DL-丝氨酸(III 和 VII)。