Asymmetric syntheses of protected (2S,3S,4S)-3-hydroxy-4-methylproline and 4′-tert-butoxyamido-2′-deoxythymidine
作者:Wei-Hua Meng、Tian-Jun Wu、Hong-Kui Zhang、Pei-Qiang Huang
DOI:10.1016/j.tetasy.2004.10.030
日期:2004.12
3S)-3-hydroxyproline 1; (iii) (2R,3S)-3-hydroxyprolinol 5, and (iv) 4′-tert-butoxyamido-2′-deoxythymidine 6b. The method features a stepwise regio- and diastereoselective reductive furylation of the protected (3S,4S)-4-methylmalimide 10, (S)-malimide 9, and a chemoselective oxidative transformation of the furyl group to the carboxyl group as the key steps.
本文描述了一种通用的方法,用于(i)(2 S,3 S,4 S)-3-羟基-4-甲基脯氨酸3,其是棘球and菌素和相关寡肽抗生素的一种成分;(ii)(2 S,3 S)-3-羟基脯氨酸1 ; (iii)(2 R,3 S)-3-羟基脯氨醇5和(iv)4'-叔-丁氧基酰胺基2'-脱氧胸苷6b。该方法的特征是受保护的(3 S,4 S)-4-甲基苹果酰亚胺10,(S)-苹果酰亚胺9的逐步区域和非对映选择性还原呋喃化,以及呋喃基向羧基的化学选择性氧化转化是关键步骤。