作者:Won-Hyuk Jung、Cristian Harrison、Youseung Shin、Jean-Hugues Fournier、Raghavan Balachandran、Brianne S. Raccor、Rachel P. Sikorski、Andreas Vogt、Dennis P. Curran、Billy W. Day
DOI:10.1021/jm061385k
日期:2007.6.1
The structure-activity relationship of the crucial C16 region of (-)-dictyostatin was established through total synthesis of analogs followed by detailed biological characterization. A versatile synthetic strategy was used to prepare milligram quantities of 16-normethyldictyostatin, 16-epi-dictyostatin, and the C16-normethyl-C15Z isomer. Along the way, a number of other E/Z isomers and epimers were
(-)-dictyostatin关键C16区的结构活性关系是通过类似物的全合成,然后进行详细的生物学表征来建立的。一种通用的合成策略用于制备毫克量的16-正甲基顺式他汀,16-表-顺式他汀和C16-正甲基-C15Z异构体。在此过程中,还制备了许多其他的E / Z异构体和差向异构体,并发现了一种新型的内酯环收缩,可制得具有20元大内酯(而不是22元大内酯)的异-dictyostatins。16-去甲基-15,16-脱氢dictyostatin的合成是通过最大汇聚途径合成的dictyostatin中的第一个,其中三个主要片段组装在一起,背靠背连接,然后通过重新官能化和大环内酯化处理。基于细胞的和生化评估显示,新药中最有效的是16-normethyl-15,16-dehydrodictyostatin和16-normethyldictyostatin,它们的活性仅比(-)-dictyostati