作者:Christoph Hermann、Chiara Giammasi、Armin Geyer、Martin E Maier
DOI:10.1016/s0040-4020(01)00903-6
日期:2001.10
The paper details the synthesis of hapalosin analogs 4 (cyclic depsipeptides) using solid-phase chemistry. Key building blocks were the Fmoc-protected γ-amino-β-hydroxy acid 11 and the THP-protected syn-β-hydroxy acids 18. The amino acid 11 was fashioned from the amine 6 which was obtained by an ADH-route. The protected amino acids 18 were prepared by Evans aldol reactions. Esterification of 18 with
该论文详细介绍了使用固相化学合成Hapalosin类似物4(环状二肽)的方法。关键的组成部分是Fmoc保护的γ-氨基-β-羟基酸11和THP保护的合成-β-羟基酸18。氨基酸11由通过ADH-途径获得的胺6形成。通过Evans aldol反应制备受保护的氨基酸18。用王氏树脂酯化18开始了二肽25的固相组装包含所有构件。氨基的最终溶液相脱保护,然后进行大内酰胺化,完成了类似物4的合成。在一种情况下(化合物4aaa),使用ROESY NMR光谱学和MD模拟研究了构象。这揭示几乎完全:对于(93 7)的偏好小号-顺-rotamer。