ManipulatingL-Aspartic andL-Glutamic Acids− Diastereoselective Synthesis of Enantiopureβ-Amino-γ-hydroxy Acids andγ-Amino-δ-hydroxy Acids
作者:José M. Andrés、Eva M. Muñoz、Rafael Pedrosa、Alfonso Pérez-Encabo
DOI:10.1002/ejoc.200300199
日期:2003.9
Enantiopure (3S,4R)- and (3S,4S)-3-amino-4-hydroxyhexanoic acids and (4S,5R)- and (4S,5S)-4-amino-5-hydroxyheptanoic acid derivatives have been prepared by stereodivergent synthesis from L-aspartic and L-glutamic acids, respectively. The stereochemistry at the carbon atom attached to the amino group was determined from the starting material, but the configuration at C-4 or C-5 is controlled by diastereoselective
Enantiopure (3S,4R)- 和 (3S,4S)-3-amino-4-hydroxyhexanoic 酸和 (4S,5R)- 和 (4S,5S)-4-amino-5-hydroxyheptanoic 酸衍生物已通过立体发散法制备分别由 L-天冬氨酸和 L-谷氨酸合成。与氨基相连的碳原子的立体化学由起始材料确定,但 C-4 或 C-5 的构型由二乙基锌或乙基溴化镁的非对映选择性烷基化控制。作为 OBO 原酸酯的羧基保护提高了最终产品的产率。(© Wiley-VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2003)