Atropselective Macrocyclization of Diaryl Ether Ring Systems: Application to the Synthesis of Vancomycin Model Systems
作者:K. C. Nicolaou、Christopher N. C. Boddy
DOI:10.1021/ja020736r
日期:2002.9.1
Vancomycin is the last line of defense available in the clinic for treating multidrug-resistant bacterial infections. Vancomycin contains two 16-membered diaryl ether macrocycles, each of which contains a stereogenic axis across the diaryl ether linkage. Since an effective total synthesis of vancomycin requires that these stereogenic axes be formed in a stereoselective manner, we have developed an
万古霉素是临床上治疗耐多药细菌感染的最后一道防线。万古霉素包含两个 16 元二芳基醚大环,每个大环都包含一个穿过二芳基醚键的立体轴。由于万古霉素的有效全合成需要以立体选择性方式形成这些立体轴,因此我们开发了三氮烯介导的二芳基醚形成反应的 atropselective 变化。这种变化在不需要的阻转异构体的过渡态中引入了能量惩罚。该反应用于合成万古霉素中发现的 COD 二芳基醚大环,具有高非对映选择性(de > 90%),提供天然存在的阻转异构构型。