The present invention is directed to a method for purifying pyruvic acid compounds, which method comprises reacting a pyruvic acid compound of general formula (I):
wherein R1 is an optionally substituted lower alkyl group, a lower alkenyl group, a lower alkynyl group, a cycloalkyl group, an aryl group, or a heterocyclic group, and R2 is a lower alkyl group, with a bisulfite of general formula (II):
MHSO3 (II)
wherein M is NH4 or an alkali metal, to give a bisulfite adduct of the pyruvic acid compound and then decomposing the adduct with an acid. According to the present invention, pyruvic acid compounds can be purified by simple and easy procedures without using purification techniques such as distillation or column chromatography, and the above method is advantageous as a process for the production on an industrial scale.
本发明涉及一种纯化丙酮酸化合物的方法,该方法包括使通式(I)的丙酮酸化合物反应:
其中 R1 是任选取代的低级烷基、低级烯基、低级炔基、环烷基、芳基或杂环基,R2 是低级烷基,与通式(II)的亚硫酸氢盐反应:
MHSO3 (II)
其中 M 为 NH4 或碱金属,以得到丙酮酸化合物的亚硫酸氢盐加合物,然后用酸分解该加合物。根据本发明,丙酮酸化合物可以通过简单易行的程序进行纯化,而无需使用蒸馏或柱层析等纯化技术,上述方法作为一种工业规模的生产工艺是非常有利的。
Wislicenus; Schultz, Justus Liebigs Annalen der Chemie, 1924, vol. 436, p. 60
作者:Wislicenus、Schultz
DOI:——
日期:——
Structure and Tautomerism of the Esters of Several β-Substituted Pyruvic Acids<sup>1</sup>
作者:ALBERT M. STOCK、W. E. DONAHUE、E. D. AMSTUTZ
DOI:10.1021/jo01106a006
日期:1958.12
US6348617B1
申请人:——
公开号:US6348617B1
公开(公告)日:2002-02-19
Synthesis and aldose reductase-inhibitory activities of structural analogues of WF-3681, a novel aldose reductase inhibitor.
Various analogues of WF-3681 (1a), a novel aldose reductase inhibitor, were synthesized and examined for aldose reductase-inhibitory activity. It was found that the carboxylic acid function is necessary and the side-chain length is important for the activity. Furthermore, the lipophilicities of the benzene ring and the enol ether group are significant for increasing the activity.