Expeditious Syntheses of Two Arylglycine Derivatives Corresponding to the Central Amino Acid of the Vancomycin Family of Antibiotics
作者:Anthony J. Pearson、Mariappan V. Chelliah、Gilles C. Bignan
DOI:10.1055/s-1997-1234
日期:1997.5
Two expeditious and efficient syntheses (in 7 and 4 steps, respectively) are described for the central amino acid part of the vancomycin family. The first method constitutes a concise asymmetric synthesis, starting from 4-hydroxyphenylacetic acid, of (R)-(3,5-dihydroxy-4-methoxyphenyl)glycine derivatives using Evans’ asymmetric azidation methodology. In the second approach, an efficient synthesis of a protected 3,5-dichloro-4-methoxyphenylglycine derivative is described, starting from commercially available (R)-4-hydroxyphenylglycine. These two syntheses are much shorter and operationally simpler than those previously described, and are currently employed in an effort towards the construction of the bicyclic system of vancomycin and ristocetin.
针对万古霉素家族的核心氨基酸部分,介绍了两种快速高效的合成方法(分别为 7 步和 4 步)。第一种方法是以 4- 羟基苯乙酸为起点,采用 Evans 的不对称叠氮方法,简便地不对称合成 (R)-(3,5-二羟基-4-甲氧基苯基)甘氨酸衍生物。在第二种方法中,描述了一种受保护的 3,5-二氯-4-甲氧基苯基甘氨酸衍生物的高效合成方法,该方法从市场上可买到的 (R)-4- 羟基苯基甘氨酸开始。这两种合成方法与之前描述的方法相比,时间更短,操作更简单,目前正用于构建万古霉素和利斯托霉素的双环系统。