作者:Srinivas Tekkam、Joseph L. Johnson、Subash C. Jonnalagadda、Venkatram R. Mereddy
DOI:10.1002/jhet.1097
日期:2013.7
A novel methodology for the efficient synthesis of [2.2.1] heterobicyclic pyroglutamates has been described. The key synthetic steps involve alkylation of amino acid‐derived iminoesters with Baylis‐Hillman bromide, RhCl3‐catalyzed exocyclic olefin isomerization, diastereoselective dihydroxylation, and regioselective lactonization. All the compounds were evaluated for their cytotoxicity using multiple
已经描述了有效合成[2.2.1]杂双环焦谷氨酸的新颖方法。关键的合成步骤包括用Baylis-Hillman溴化物对氨基酸衍生的亚氨基酯进行烷基化,RhCl 3催化的环外烯烃异构化,非对映选择性二羟基化和区域选择性内酯化。使用多发性骨髓瘤癌细胞系RPMI 8226对所有化合物的细胞毒性进行了评估。