Preparation of Tricyclic Lactam Model Compounds of Renieramycin and Saframycin Anticancer Natural Products from Common Intermediate
作者:Keiyo Nakai、Masashi Yokoya、Naoki Saito
DOI:10.1248/cpb.c13-00361
日期:——
Tricyclic lactam model compounds of the left half (ABC ring) of renieramycin and saframycin anticancer natural products were prepared from common intermediate 6a. Readily available alcohol 6a was converted into enamide 8, and this was followed by transformation into 6b through a hydrobromination reaction in a stereoselective manner. Some diastereomers at C-6 to C-11a of the tricyclic lactam model compounds
肾上腺素和沙弗霉素抗癌天然产物的左半部分(ABC环)的三环内酰胺模型化合物由常见的中间体6a制备。将现成的醇6a转化为酰胺8,然后通过立体选择性方式的氢溴化反应将其转化为6b。由6a或6b以良好的产率制备了在C-6具有多个官能团的三环内酰胺模型化合物的C-6至C-11a的一些非对映异构体。我们还提出了对苯醌的意外还原性乙酰化反应,以产生相应的3,4-脱氢衍生物。