Preparation and biological evaluation of novel leucomycin analogs derived from nitroso Diels–Alder reactions
作者:Baiyuan Yang、Tina Zöllner、Peter Gebhardt、Ute Möllmann、Marvin J. Miller
DOI:10.1039/b922450e
日期:——
A series of 10,13-disubstituted 16-membered macrolides was synthesized using nitroso DielsâAlder reactions of leucomycin A7. Despite the extensive constituent functionalities in leucomycin, the hetero cycloaddition reactions proceeded in a highly regio- and stereoselective fashion. Subsequent chemical modifications of the nitroso cycloadducts, including NâO bond reduction, were also conducted. Most leucomycin derivatives retained antibiotic profiles similar to leucomycin A7, and, in contrast to leucomycin itself, several exhibited moderate antiproliferative and cytotoxic activity.
利用白霉素 A7 的亚硝基 DielsâAlder 反应合成了一系列 10,13-二取代 16 元大环内酯类化合物。尽管白霉素中含有大量的组成官能团,但杂环加成反应仍以高度区域和立体选择性的方式进行。随后还对亚硝基环加成物进行了化学修饰,包括 NâO 键还原。大多数白霉素衍生物保留了与白霉素 A7 相似的抗生素特性,与白霉素本身不同的是,其中几种衍生物表现出适度的抗增殖和细胞毒性活性。